Merge branch 'master' into T1312-MG-Cache-vertex-reads-on-disk

Co-authored-by: Andi <andi8647@gmail.com>

.githooks/pre-commit

@@ -33,4 +33,4 @@ for file in $modified_files; do
   fi
 done;
 
-return ${FAIL}
+exit ${FAIL}

.github/workflows/daily_benchmark.yaml

@@ -67,7 +67,11 @@ jobs:
       - name: Run mgbench
         run: |
           cd tests/mgbench
-          ./benchmark.py vendor-native --num-workers-for-benchmark 12 --export-results benchmark_result.json pokec/medium/*/*
+          ./benchmark.py vendor-native --num-workers-for-benchmark 12 --export-results benchmark_pokec.json pokec/medium/*/*
+
+          ./benchmark.py vendor-native --num-workers-for-benchmark 1 --export-results benchmark_supernode.json supernode
+
+          ./benchmark.py vendor-native --num-workers-for-benchmark 1 --export-results benchmark_high_write_set_property.json high_write_set_property
 
       - name: Upload mgbench results
         run: |
@@ -76,7 +80,19 @@ jobs:
           source ve3/bin/activate
           pip install -r requirements.txt
           ./main.py --benchmark-name "mgbench" \
-                    --benchmark-results-path "../../tests/mgbench/benchmark_result.json" \
+                    --benchmark-results-path "../../tests/mgbench/benchmark_pokec.json" \
+                    --github-run-id "${{ github.run_id }}" \
+                    --github-run-number "${{ github.run_number }}" \
+                    --head-branch-name "${{ env.BRANCH_NAME }}"
+
+          ./main.py --benchmark-name "supernode" \
+                    --benchmark-results-path "../../tests/mgbench/benchmark_supernode.json" \
+                    --github-run-id "${{ github.run_id }}" \
+                    --github-run-number "${{ github.run_number }}" \
+                    --head-branch-name "${{ env.BRANCH_NAME }}"
+
+          ./main.py --benchmark-name "high_write_set_property" \
+                    --benchmark-results-path "../../tests/mgbench/benchmark_high_write_set_property.json" \
                     --github-run-id "${{ github.run_id }}" \
                     --github-run-number "${{ github.run_number }}" \
                     --head-branch-name "${{ env.BRANCH_NAME }}"

.github/workflows/diff.yaml

@@ -43,7 +43,7 @@ jobs:
 
           # Build community binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release -DMG_ENTERPRISE=OFF ..
+          cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DMG_ENTERPRISE=OFF ..
           make -j$THREADS
 
       - name: Run unit tests
@@ -101,7 +101,7 @@ jobs:
             echo ${file}
             if [[ ${file} == *.py ]]; then
               python3 -m black --check --diff ${file}
-              python3 -m isort --check-only --diff ${file}
+              python3 -m isort --profile black --check-only --diff ${file}
             fi
           done
 
@@ -229,6 +229,11 @@ jobs:
           # branches and tags. (default: 1)
           fetch-depth: 0
 
+      - name: Check e2e service dependencies
+        run: |
+          cd tests/e2e
+          ./dependency_check.sh
+
       - name: Build release binaries
         run: |
           # Activate toolchain.
@@ -239,12 +244,14 @@ jobs:
 
           # Build release binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release ..
+          cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
           make -j$THREADS
 
       - name: Run GQL Behave tests
         run: |
-          cd tests/gql_behave
+          cd tests
+          ./setup.sh /opt/toolchain-v4/activate
+          cd gql_behave
           ./continuous_integration
 
       - name: Save quality assurance status
@@ -275,11 +282,13 @@ jobs:
       - name: Run stress test (plain)
         run: |
           cd tests/stress
+          source ve3/bin/activate
           ./continuous_integration
 
       - name: Run stress test (SSL)
         run: |
           cd tests/stress
+          source ve3/bin/activate
           ./continuous_integration --use-ssl
 
       - name: Run durability test
@@ -342,7 +351,7 @@ jobs:
           ./init
           # Build only memgraph release binarie.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release ..
+          cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
           make -j$THREADS memgraph
 
       - name: Run Jepsen tests
@@ -410,11 +419,12 @@ jobs:
           source ve3/bin/activate
           pip install -r requirements.txt
           ./main.py --benchmark-name "macro_benchmark" \
-                    --benchmark-results-path "../../tests/macro_benchmark/.harness_summary" \
+                    --benchmark-results "../../tests/macro_benchmark/.harness_summary" \
                     --github-run-id "${{ github.run_id }}" \
                     --github-run-number "${{ github.run_number }}" \
                     --head-branch-name "${{ env.BRANCH_NAME }}"
 
+      # TODO (andi) No need for path flags and for --disk-storage and --in-memory-analytical
       - name: Run mgbench
         run: |
           cd tests/mgbench
@@ -427,7 +437,7 @@ jobs:
           source ve3/bin/activate
           pip install -r requirements.txt
           ./main.py --benchmark-name "mgbench" \
-                    --benchmark-results-path "../../tests/mgbench/benchmark_result.json" \
+                    --benchmark-results "../../tests/mgbench/benchmark_result.json" \
                     --github-run-id "${{ github.run_id }}" \
                     --github-run-number "${{ github.run_number }}" \
                     --head-branch-name "${{ env.BRANCH_NAME }}"

.github/workflows/package_all.yaml

@@ -8,6 +8,13 @@ on:
       memgraph_version:
         description: "Memgraph version to upload as. If empty upload is skipped. Format: 'X.Y.Z'"
         required: false
+      build_type:
+        type: choice
+        description: "Memgraph Build type. Default value is Release."
+        default: 'Release'
+        options:
+          - Release
+          - RelWithDebInfo
 
 jobs:
   centos-7:
@@ -20,7 +27,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package centos-7
+          ./release/package/run.sh package centos-7 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -37,7 +44,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package centos-9
+          ./release/package/run.sh package centos-9 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -54,7 +61,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package debian-10
+          ./release/package/run.sh package debian-10 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -71,7 +78,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package debian-11
+          ./release/package/run.sh package debian-11 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -89,7 +96,7 @@ jobs:
       - name: "Build package"
         run: |
           cd release/package
-          ./run.sh package debian-11 --for-docker
+          ./run.sh package debian-11 ${{ github.event.inputs.build_type }} --for-docker
           ./run.sh docker
       - name: "Upload package"
         uses: actions/upload-artifact@v3
@@ -107,7 +114,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package ubuntu-18.04
+          ./release/package/run.sh package ubuntu-18.04 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -124,7 +131,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package ubuntu-20.04
+          ./release/package/run.sh package ubuntu-20.04 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -141,7 +148,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package ubuntu-22.04
+          ./release/package/run.sh package ubuntu-22.04 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -158,7 +165,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package debian-11 --for-platform
+          ./release/package/run.sh package debian-11 ${{ github.event.inputs.build_type }} --for-platform
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -175,7 +182,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package fedora-36
+          ./release/package/run.sh package fedora-36 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -192,7 +199,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package amzn-2
+          ./release/package/run.sh package amzn-2 ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -209,7 +216,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package debian-11-arm
+          ./release/package/run.sh package debian-11-arm ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:
@@ -226,7 +233,7 @@ jobs:
           fetch-depth: 0 # Required because of release/get_version.py
       - name: "Build package"
         run: |
-          ./release/package/run.sh package ubuntu-22.04-arm
+          ./release/package/run.sh package ubuntu-22.04-arm ${{ github.event.inputs.build_type }}
       - name: "Upload package"
         uses: actions/upload-artifact@v3
         with:

.github/workflows/performance_benchmarks.yaml

@@ -0,0 +1,77 @@
+name: Run performance benchmarks manually
+
+on:
+  workflow_dispatch:
+
+jobs:
+  performance_benchmarks:
+    name: "Performance benchmarks"
+    runs-on: [self-hosted, Linux, X64, Diff, Gen7]
+    env:
+      THREADS: 24
+      MEMGRAPH_ENTERPRISE_LICENSE: ${{ secrets.MEMGRAPH_ENTERPRISE_LICENSE }}
+      MEMGRAPH_ORGANIZATION_NAME: ${{ secrets.MEMGRAPH_ORGANIZATION_NAME }}
+
+    steps:
+      - name: Set up repository
+        uses: actions/checkout@v3
+        with:
+          # Number of commits to fetch. `0` indicates all history for all
+          # branches and tags. (default: 1)
+          fetch-depth: 0
+
+      - name: Build release binaries
+        run: |
+          # Activate toolchain.
+          source /opt/toolchain-v4/activate
+
+          # Initialize dependencies.
+          ./init
+
+          # Build only memgraph release binaries.
+          cd build
+          cmake -DCMAKE_BUILD_TYPE=release ..
+          make -j$THREADS
+
+      - name: Get branch name (merge)
+        if: github.event_name != 'pull_request'
+        shell: bash
+        run: echo "BRANCH_NAME=$(echo ${GITHUB_REF#refs/heads/} | tr / -)" >> $GITHUB_ENV
+
+      - name: Get branch name (pull request)
+        if: github.event_name == 'pull_request'
+        shell: bash
+        run: echo "BRANCH_NAME=$(echo ${GITHUB_HEAD_REF} | tr / -)" >> $GITHUB_ENV
+
+      - name: Run benchmarks
+        run: |
+          cd tests/mgbench
+          ./benchmark.py vendor-native --num-workers-for-benchmark 12 --export-results benchmark_result.json pokec/medium/*/*
+
+          ./benchmark.py vendor-native --num-workers-for-benchmark 1 --export-results benchmark_supernode.json supernode
+
+          ./benchmark.py vendor-native --num-workers-for-benchmark 1 --export-results benchmark_high_write_set_property.json high_write_set_property
+
+      - name: Upload benchmark results
+        run: |
+          cd tools/bench-graph-client
+          virtualenv -p python3 ve3
+          source ve3/bin/activate
+          pip install -r requirements.txt
+          ./main.py --benchmark-name "mgbench" \
+                    --benchmark-results-path "../../tests/mgbench/benchmark_result.json" \
+                    --github-run-id "${{ github.run_id }}" \
+                    --github-run-number "${{ github.run_number }}" \
+                    --head-branch-name "${{ env.BRANCH_NAME }}"
+
+          ./main.py --benchmark-name "supernode" \
+                    --benchmark-results-path "../../tests/mgbench/benchmark_supernode.json" \
+                    --github-run-id "${{ github.run_id }}" \
+                    --github-run-number "${{ github.run_number }}" \
+                    --head-branch-name "${{ env.BRANCH_NAME }}"
+
+          ./main.py --benchmark-name "high_write_set_property" \
+                    --benchmark-results-path "../../tests/mgbench/benchmark_high_write_set_property.json" \
+                    --github-run-id "${{ github.run_id }}" \
+                    --github-run-number "${{ github.run_number }}" \
+                    --head-branch-name "${{ env.BRANCH_NAME }}"

.github/workflows/release_centos8.yaml

@@ -2,6 +2,15 @@ name: Release CentOS 8
 
 on:
   workflow_dispatch:
+    inputs:
+      build_type:
+        type: choice
+        description: "Memgraph Build type. Default value is Release."
+        default: 'Release'
+        options:
+          - Release
+          - RelWithDebInfo
+
   schedule:
     - cron: "0 22 * * *"
 
@@ -33,7 +42,7 @@ jobs:
 
           # Build community binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release -DMG_ENTERPRISE=OFF ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} -DMG_ENTERPRISE=OFF ..
           make -j$THREADS
 
       - name: Run unit tests
@@ -190,7 +199,7 @@ jobs:
 
           # Build release binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} ..
           make -j$THREADS
 
       - name: Create enterprise RPM package

.github/workflows/release_debian10.yaml

@@ -2,6 +2,15 @@ name: Release Debian 10
 
 on:
   workflow_dispatch:
+    inputs:
+      build_type:
+        type: choice
+        description: "Memgraph Build type. Default value is Release."
+        default: 'Release'
+        options:
+          - Release
+          - RelWithDebInfo
+
   schedule:
     - cron: "0 22 * * *"
 
@@ -33,7 +42,7 @@ jobs:
 
           # Build community binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release -DMG_ENTERPRISE=OFF ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} -DMG_ENTERPRISE=OFF ..
           make -j$THREADS
 
       - name: Run unit tests
@@ -190,7 +199,7 @@ jobs:
 
           # Build release binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} ..
           make -j$THREADS
 
       - name: Create enterprise DEB package
@@ -322,7 +331,7 @@ jobs:
           ./init
           # Build only memgraph release binary.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} ..
           make -j$THREADS memgraph
 
       - name: Run Jepsen tests

.github/workflows/release_ubuntu2004.yaml

@@ -2,6 +2,15 @@ name: Release Ubuntu 20.04
 
 on:
   workflow_dispatch:
+    inputs:
+      build_type:
+        type: choice
+        description: "Memgraph Build type. Default value is Release."
+        default: 'Release'
+        options:
+          - Release
+          - RelWithDebInfo
+
   schedule:
     - cron: "0 22 * * *"
 
@@ -33,7 +42,7 @@ jobs:
 
           # Build community binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release -DMG_ENTERPRISE=OFF ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} -DMG_ENTERPRISE=OFF ..
           make -j$THREADS
 
       - name: Run unit tests
@@ -190,7 +199,7 @@ jobs:
 
           # Build release binaries.
           cd build
-          cmake -DCMAKE_BUILD_TYPE=release ..
+          cmake -DCMAKE_BUILD_TYPE=${{ github.event.inputs.build_type }} ..
           make -j$THREADS
 
       - name: Create enterprise DEB package

.gitignore

@@ -16,8 +16,7 @@
 .ycm_extra_conf.pyc
 .temp/
 Testing/
-build
-build/
+/build*/
 release/examples/build
 cmake-build-*
 cmake/DownloadProject/

.pre-commit-config.yaml

@@ -15,7 +15,21 @@ repos:
     hooks:
       - id: isort
         name: isort (python)
+        args: ["--profile", "black"]
   - repo: https://github.com/pre-commit/mirrors-clang-format
     rev: v13.0.0
     hooks:
       - id: clang-format
+#  - repo: local
+#    hooks:
+#      - id: clang-tidy
+#        name: clang-tidy
+#        description: Runs clang-tidy and checks for errors
+#        entry: python ./tools/pre-commit/clang-tidy.py
+#        language: python
+#        files: ^src/
+#        types: [c++, text]
+#        fail_fast: true
+#        require_serial: true
+#        args: [--compile_commands_path=build]
+#        pass_filenames: false

CMakeLists.txt

@@ -42,6 +42,10 @@ endif()
 
 project(memgraph LANGUAGES C CXX)
 
+# NOTE: once in a while this needs to be toggled to check headers are
+#       correct and PCH isn't masking any include issues
+set(CMAKE_DISABLE_PRECOMPILE_HEADERS OFF)
+
 #TODO: upgrade to cmake 3.24 + CheckIPOSupported
 #cmake_policy(SET CMP0138 NEW)
 #include(CheckIPOSupported)
@@ -211,8 +215,8 @@ set(CMAKE_CXX_FLAGS_RELWITHDEBINFO
 # ** Static linking is allowed only for executables! **
 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
 
-# Use gold linker to speedup build
-set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=gold")
+# Use lld linker to speedup build
+add_link_options(-fuse-ld=lld) # TODO: use mold linker
 
 # release flags
 set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG")

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-<img width="400px" src="https://uploads-ssl.webflow.com/5e7ceb09657a69bdab054b3a/5e7ceb09657a6937ab054bba_Black_Original%20_Logo.png">
+<img src="https://public-assets.memgraph.com/github-readme-images/github-memgraph-repo-banner.png">
 </p>
 
 ---

config/flags.yaml

@@ -99,6 +99,10 @@ modifications:
     value: "SNAPSHOT_ISOLATION"
     override: true
 
+  - name: "storage_mode"
+    value: "IN_MEMORY_TRANSACTIONAL"
+    override: true
+
   - name: "allow_load_csv"
     value: "true"
     override: false
@@ -107,6 +111,10 @@ modifications:
     value: "false"
     override: true
 
+  - name: "query_callable_mappings_path"
+    value: "/etc/memgraph/apoc_compatibility_mappings.json"
+    override: true
+
 undocumented:
   - "flag_file"
   - "also_log_to_stderr"

config/mappings.json

@@ -0,0 +1,27 @@
+{
+    "dbms.components": "mgps.components",
+    "apoc.util.validate": "mgps.validate",
+    "db.schema.nodeTypeProperties":"schema.node_type_properties",
+    "db.schema.relTypeProperties":"schema.rel_type_properties",
+    "apoc.coll.contains": "collections.contains",
+    "apoc.coll.partition": "collections.partition",
+    "apoc.coll.toSet": "collections.to_set",
+    "apoc.coll.unionAll": "collections.unionAll",
+    "apoc.coll.removeAll": "collections.remove_all",
+    "apoc.coll.union": "collections.union",
+    "apoc.coll.sum": "collections.sum",
+    "apoc.coll.pairs": "collections.pairs",
+    "apoc.map.fromLists": "map.from_lists",
+    "apoc.map.removeKeys": "map.remove_keys",
+    "apoc.map.merge": "map.merge",
+    "apoc.create.nodes": "create.nodes",
+    "apoc.create.removeProperties": "create.remove_properties",
+    "apoc.create.node": "create.node",
+    "apoc.create.removeLabel": "create.remove_label",
+    "apoc.refactor.invert": "refactor.invert",
+    "apoc.refactor.cloneNode": "refactor.clone_node",
+    "apoc.refactor.cloneSubgraph": "refactor.clone_subgraph",
+    "apoc.refactor.cloneSubgraphFromPath": "refactor.clone_subgraph_from_path",
+    "apoc.label.exists": "label.exists"
+
+}

environment/.gitignore

@@ -1,2 +0,0 @@
-archives
-build

environment/README.md

@@ -1,5 +1,10 @@
 # Memgraph Operating Environments
 
+## Issues related to build toolchain
+
+* GCC 11.2 (toolchain-v4) doesn't compile on Fedora 38, multiple definitions of enum issue
+* spdlog 1.10/11 doesn't work with fmt 10.0.0
+
 ## os
 
 Under the `os` directory, you can find scripts to install all required system

environment/os/amzn-2.sh

@@ -18,7 +18,7 @@ TOOLCHAIN_BUILD_DEPS=(
     curl libcurl-devel # for cmake
     readline-devel # for cmake and llvm
     libffi-devel libxml2-devel # for llvm
-    libedit-devel pcre-devel automake bison # for swig
+    libedit-devel pcre-devel pcre2-devel automake bison # for swig
     file
     openssl-devel
     gmp-devel

environment/os/centos-7.sh

@@ -20,7 +20,7 @@ TOOLCHAIN_BUILD_DEPS=(
     curl # snappy
     readline-devel # cmake and llvm
     libffi-devel libxml2-devel perl-Digest-MD5 # llvm
-    libedit-devel pcre-devel automake bison # swig
+    libedit-devel pcre-devel pcre2-devel automake bison # swig
     file
     openssl-devel
     gmp-devel

environment/os/centos-9.sh

@@ -17,7 +17,7 @@ TOOLCHAIN_BUILD_DEPS=(
     expat-devel xz-devel python3-devel texinfo libbabeltrace-devel # for gdb
     readline-devel # for cmake and llvm
     libffi-devel libxml2-devel # for llvm
-    libedit-devel pcre-devel automake bison # for swig
+    libedit-devel pcre-devel pcre2-devel automake bison # for swig
     file
     openssl-devel
     gmp-devel

environment/os/debian-10.sh

@@ -24,7 +24,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libgmp-dev # for gdb
     gperf # for proxygen
     git # for fbthrift
-    libedit-dev libpcre3-dev automake bison # for swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # for swig
 )
 
 TOOLCHAIN_RUN_DEPS=(

environment/os/debian-11-arm.sh

@@ -18,7 +18,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libcurl4-openssl-dev # for cmake
     libreadline-dev # for cmake and llvm
     libffi-dev libxml2-dev # for llvm
-    libedit-dev libpcre3-dev automake bison # for swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # for swig
     curl # snappy
     file # for libunwind
     libssl-dev # for libevent

environment/os/debian-11.sh

@@ -18,7 +18,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libcurl4-openssl-dev # for cmake
     libreadline-dev # for cmake and llvm
     libffi-dev libxml2-dev # for llvm
-    libedit-dev libpcre3-dev automake bison # for swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # for swig
     curl # snappy
     file # for libunwind
     libssl-dev # for libevent

environment/os/fedora-36.sh

@@ -18,7 +18,7 @@ TOOLCHAIN_BUILD_DEPS=(
     curl libcurl-devel # for cmake
     readline-devel # for cmake and llvm
     libffi-devel libxml2-devel # for llvm
-    libedit-devel pcre-devel automake bison # for swig
+    libedit-devel pcre-devel pcre2-devel automake bison # for swig
     file
     openssl-devel
     gmp-devel

environment/os/fedora-38.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+
+set -Eeuo pipefail
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+source "$DIR/../util.sh"
+
+check_operating_system "fedora-38"
+check_architecture "x86_64"
+
+TOOLCHAIN_BUILD_DEPS=(
+    coreutils-common gcc gcc-c++ make # generic build tools
+    wget # used for archive download
+    gnupg2 # used for archive signature verification
+    tar gzip bzip2 xz unzip # used for archive unpacking
+    zlib-devel # zlib library used for all builds
+    expat-devel xz-devel python3-devel texinfo libbabeltrace-devel # for gdb
+    curl libcurl-devel # for cmake
+    readline-devel # for cmake and llvm
+    libffi-devel libxml2-devel # for llvm
+    libedit-devel pcre-devel pcre2-devel automake bison # for swig
+    file
+    openssl-devel
+    gmp-devel
+    gperf
+    diffutils
+    libipt libipt-devel # intel
+    patch
+    perl # for openssl
+)
+
+TOOLCHAIN_RUN_DEPS=(
+    make # generic build tools
+    tar gzip bzip2 xz # used for archive unpacking
+    zlib # zlib library used for all builds
+    expat xz-libs python3 # for gdb
+    readline # for cmake and llvm
+    libffi libxml2 # for llvm
+    openssl-devel
+)
+
+MEMGRAPH_BUILD_DEPS=(
+    git # source code control
+    make pkgconf-pkg-config # build system
+    wget # for downloading libs
+    libuuid-devel java-11-openjdk # required by antlr
+    readline-devel # for memgraph console
+    python3-devel # for query modules
+    openssl-devel
+    libseccomp-devel
+    python3 python3-pip python3-virtualenv python3-virtualenvwrapper python3-pyyaml nmap-ncat # for tests
+    libcurl-devel # mg-requests
+    rpm-build rpmlint # for RPM package building
+    doxygen graphviz # source documentation generators
+    which nodejs golang zip unzip java-11-openjdk-devel # for driver tests
+    sbcl # for custom Lisp C++ preprocessing
+    autoconf # for jemalloc code generation
+    libtool  # for protobuf code generation
+)
+
+list() {
+    echo "$1"
+}
+
+check() {
+    if [ -v LD_LIBRARY_PATH ]; then
+      # On Fedora 38 yum/dnf and python11 use newer glibc which is not compatible
+      # with ours, so we need to momentarely disable env
+      local OLD_LD_LIBRARY_PATH=${LD_LIBRARY_PATH}
+      LD_LIBRARY_PATH=""
+    fi
+    local missing=""
+    for pkg in $1; do
+        if ! dnf list installed "$pkg" >/dev/null 2>/dev/null; then
+            missing="$pkg $missing"
+        fi
+    done
+    if [ "$missing" != "" ]; then
+        echo "MISSING PACKAGES: $missing"
+        exit 1
+    fi
+    if [ -v OLD_LD_LIBRARY_PATH ]; then
+      echo "Restoring LD_LIBRARY_PATH..."
+      LD_LIBRARY_PATH=${OLD_LD_LIBRARY_PATH}
+    fi
+}
+
+install() {
+    cd "$DIR"
+    if [ "$EUID" -ne 0 ]; then
+        echo "Please run as root."
+        exit 1
+    fi
+    # If GitHub Actions runner is installed, append LANG to the environment.
+    # Python related tests don't work without the LANG export.
+    if [ -d "/home/gh/actions-runner" ]; then
+        echo "LANG=en_US.utf8" >> /home/gh/actions-runner/.env
+    else
+        echo "NOTE: export LANG=en_US.utf8"
+    fi
+    dnf update -y
+    for pkg in $1; do
+        dnf install -y "$pkg"
+    done
+}
+
+deps=$2"[*]"
+"$1" "${!deps}"

environment/os/ubuntu-18.04.sh

@@ -25,7 +25,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libgmp-dev # for gdb
     gperf # for proxygen
     libssl-dev
-    libedit-dev libpcre3-dev automake bison # swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # swig
 )
 
 TOOLCHAIN_RUN_DEPS=(

environment/os/ubuntu-20.04.sh

@@ -24,7 +24,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libgmp-dev # for gdb
     gperf # for proxygen
     libssl-dev
-    libedit-dev libpcre3-dev automake bison # for swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # for swig
 )
 
 TOOLCHAIN_RUN_DEPS=(

environment/os/ubuntu-22.04-arm.sh

@@ -24,7 +24,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libgmp-dev # for gdb
     gperf # for proxygen
     libssl-dev
-    libedit-dev libpcre3-dev automake bison # for swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # for swig
 )
 
 TOOLCHAIN_RUN_DEPS=(

environment/os/ubuntu-22.04.sh

@@ -24,7 +24,7 @@ TOOLCHAIN_BUILD_DEPS=(
     libgmp-dev # for gdb
     gperf # for proxygen
     libssl-dev
-    libedit-dev libpcre3-dev automake bison # for swig
+    libedit-dev libpcre2-dev libpcre3-dev automake bison # for swig
 )
 
 TOOLCHAIN_RUN_DEPS=(

environment/toolchain/.gitignore

@@ -1 +1,4 @@
+archives
+build
+output
 *.tar.gz

environment/toolchain/v2/build.sh

@@ -7,7 +7,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 CPUS=$( grep -c processor < /proc/cpuinfo )
 cd "$DIR"
 
-source "$DIR/../util.sh"
+source "$DIR/../../util.sh"
 DISTRO="$(operating_system)"
 
 # toolchain version
@@ -30,10 +30,10 @@ LLVM_VERSION=11.0.0
 SWIG_VERSION=4.0.2 # used only for LLVM compilation
 
 # Check for the dependencies.
-echo "ALL BUILD PACKAGES: $($DIR/../os/$DISTRO.sh list TOOLCHAIN_BUILD_DEPS)"
-$DIR/../os/$DISTRO.sh check TOOLCHAIN_BUILD_DEPS
-echo "ALL RUN PACKAGES: $($DIR/../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)"
-$DIR/../os/$DISTRO.sh check TOOLCHAIN_RUN_DEPS
+echo "ALL BUILD PACKAGES: $($DIR/../../os/$DISTRO.sh list TOOLCHAIN_BUILD_DEPS)"
+$DIR/../../os/$DISTRO.sh check TOOLCHAIN_BUILD_DEPS
+echo "ALL RUN PACKAGES: $($DIR/../../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)"
+$DIR/../../os/$DISTRO.sh check TOOLCHAIN_RUN_DEPS
 
 # check installation directory
 NAME=toolchain-v$TOOLCHAIN_VERSION
@@ -442,7 +442,7 @@ In order to be able to run all of these tools you should install the following
 packages:
 
 \`\`\`
-$($DIR/../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)
+$($DIR/../../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)
 \`\`\`
 
 ## Usage

environment/toolchain/v3/build.sh

@@ -7,7 +7,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 CPUS=$( grep -c processor < /proc/cpuinfo )
 cd "$DIR"
 
-source "$DIR/../util.sh"
+source "$DIR/../../util.sh"
 DISTRO="$(operating_system)"
 
 # toolchain version
@@ -31,10 +31,10 @@ LLVM_VERSION_LONG=12.0.1-rc4
 SWIG_VERSION=4.0.2 # used only for LLVM compilation
 
 # Check for the dependencies.
-echo "ALL BUILD PACKAGES: $($DIR/../os/$DISTRO.sh list TOOLCHAIN_BUILD_DEPS)"
-$DIR/../os/$DISTRO.sh check TOOLCHAIN_BUILD_DEPS
-echo "ALL RUN PACKAGES: $($DIR/../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)"
-$DIR/../os/$DISTRO.sh check TOOLCHAIN_RUN_DEPS
+echo "ALL BUILD PACKAGES: $($DIR/../../os/$DISTRO.sh list TOOLCHAIN_BUILD_DEPS)"
+$DIR/../../os/$DISTRO.sh check TOOLCHAIN_BUILD_DEPS
+echo "ALL RUN PACKAGES: $($DIR/../../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)"
+$DIR/../../os/$DISTRO.sh check TOOLCHAIN_RUN_DEPS
 
 # check installation directory
 NAME=toolchain-v$TOOLCHAIN_VERSION
@@ -452,7 +452,7 @@ In order to be able to run all of these tools you should install the following
 packages:
 
 \`\`\`
-$($DIR/../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)
+$($DIR/../../os/$DISTRO.sh list TOOLCHAIN_RUN_DEPS)
 \`\`\`
 
 ## Usage

environment/toolchain/v4/build.sh

@@ -7,7 +7,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 CPUS=$( grep -c processor < /proc/cpuinfo )
 cd "$DIR"
 
-source "$DIR/../util.sh"
+source "$DIR/../../util.sh"
 DISTRO="$(operating_system)"
 
 function log_tool_name () {
@@ -51,17 +51,13 @@ CPPCHECK_VERSION=2.6
 LLVM_VERSION=13.0.0
 SWIG_VERSION=4.0.2 # used only for LLVM compilation
 
-# Set the right env script
-ENV_SCRIPT="$DIR/../os/$DISTRO.sh"
+# Set the right operating system setup script.
+ENV_SCRIPT="$DIR/../../os/$DISTRO.sh"
 if [[ "$for_arm" = true ]]; then
-    ENV_SCRIPT="$DIR/../os/$DISTRO-arm.sh"
+    ENV_SCRIPT="$DIR/../../os/$DISTRO-arm.sh"
 fi
-
-# Check for the toolchain build dependencies.
 echo "ALL BUILD PACKAGES: $(${ENV_SCRIPT} list TOOLCHAIN_BUILD_DEPS)"
 ${ENV_SCRIPT} check TOOLCHAIN_BUILD_DEPS
-
-# Check for the toolchain run dependencies.
 echo "ALL RUN PACKAGES: $(${ENV_SCRIPT} list TOOLCHAIN_RUN_DEPS)"
 ${ENV_SCRIPT} check TOOLCHAIN_RUN_DEPS
 
@@ -658,7 +654,7 @@ In order to be able to run all of these tools you should install the following
 packages:
 
 \`\`\`
-$($DIR/../os/$ENV_SCRIPT.sh list TOOLCHAIN_RUN_DEPS)
+$($DIR/../../os/$ENV_SCRIPT.sh list TOOLCHAIN_RUN_DEPS)
 \`\`\`
 
 ## Usage

environment/toolchain/v4/snappy.patch

@@ -4,7 +4,7 @@ diff -ur a/CMakeLists.txt b/CMakeLists.txt
 @@ -52,9 +52,9 @@
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
    add_definitions(-D_HAS_EXCEPTIONS=0)
- 
+
 -  # Disable RTTI.
 -  string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 -  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
@@ -17,7 +17,7 @@ diff -ur a/CMakeLists.txt b/CMakeLists.txt
 @@ -77,9 +77,9 @@
    string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
- 
+
 -  # Disable RTTI.
 -  string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 -  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
@@ -25,5 +25,5 @@ diff -ur a/CMakeLists.txt b/CMakeLists.txt
 +  # string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 +  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
  endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
- 
+
  # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make

environment/toolchain/v5/clean.sh

@@ -0,0 +1,42 @@
+#!/bin/bash -ex
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+PREFIX=/opt/toolchain-v5
+
+# NOTE: Often times when versions in the build script are changes, something
+# doesn't work. To avoid rebuild of the whole toolchain but rebuild specific
+# lib from 0, just comment specific line under this cript and run it. Don't
+# forget to comment back to avoid unnecessary deletes next time your run this
+# cript.
+
+# rm -rf "$DIR/build"
+# rm -rf "$DIR/output"
+
+# rm -rf "$PREFIX/bin/gcc"
+# rm -rf "$PREFIX/bin/ld.gold"
+# rm -rf "$PREFIX/bin/gdb"
+# rm -rf "$PREFIX/bin/cmake"
+# rm -rf "$PREFIX/bin/clang"
+# rm -rf "$PREFIX/include/bzlib.h"
+# rm -rf "$PREFIX/include/fmt"
+# rm -rf "$PREFIX/include/lz4.h"
+# rm -rf "$PREFIX/include/lzma.h"
+# rm -rf "$PREFIX/include/zlib.h"
+# rm -rf "$PREFIX/include/zstd.h"
+# rm -rf "$PREFIX/include/jemalloc"
+# rm -rf "$PREFIX/include/boost"
+# rm -rf "$PREFIX/include/double-conversion"
+# rm -rf "$PREFIX/include/gflags"
+# rm -rf "$PREFIX/include/libunwind.h"
+# rm -rf "$PREFIX/include/glog"
+# rm -rf "$PREFIX/include/event2"
+# rm -rf "$PREFIX/include/sodium.h"
+# rm -rf "$PREFIX/include/libaio.h"
+# rm -rf "$PREFIX/include/FlexLexer.h"
+# rm -rf "$PREFIX/include/snappy.h"
+# rm -rf "$PREFIX/include/fizz"
+# rm -rf "$PREFIX/include/folly"
+# rm -rf "$PREFIX/include/proxygen"
+# rm -rf "$PREFIX/include/wangle"
+# rm -rf "$PREFIX/include/thrift"
+
+# rm -rf "$PREFIX"

environment/toolchain/v5/folly-2022.01.31.00.patch

@@ -0,0 +1,41 @@
+diff -ur a/folly/CMakeLists.txt b/folly/CMakeLists.txt
+--- a/folly/CMakeLists.txt	2021-12-12 23:10:42.000000000 +0100
++++ b/folly/CMakeLists.txt	2022-02-03 15:19:41.349693134 +0100
+@@ -28,7 +28,6 @@
+ )
+
+ add_subdirectory(experimental/exception_tracer)
+-add_subdirectory(logging/example)
+
+ if (PYTHON_EXTENSIONS)
+   # Create tree of symbolic links in structure required for successful
+diff -ur a/folly/experimental/exception_tracer/ExceptionTracerLib.cpp b/folly/experimental/exception_tracer/ExceptionTracerLib.cpp
+--- a/folly/experimental/exception_tracer/ExceptionTracerLib.cpp	2021-12-12 23:10:42.000000000 +0100
++++ b/folly/experimental/exception_tracer/ExceptionTracerLib.cpp	2022-02-03 15:19:11.003368891 +0100
+@@ -96,6 +96,7 @@
+ #define __builtin_unreachable()
+ #endif
+
++#if 0
+ namespace __cxxabiv1 {
+
+ void __cxa_throw(
+@@ -154,5 +155,5 @@
+ }
+
+ } // namespace std
+-
++#endif
+ #endif // defined(__GLIBCXX__)
+diff -ur a/folly/Portability.h b/folly/Portability.h
+--- a/folly/Portability.h	2021-12-12 23:10:42.000000000 +0100
++++ b/folly/Portability.h	2022-02-03 15:19:11.003368891 +0100
+@@ -566,7 +566,7 @@
+ #define FOLLY_HAS_COROUTINES 0
+ #elif (__cpp_coroutines >= 201703L || __cpp_impl_coroutine >= 201902L) && \
+     (__has_include(<coroutine>) || __has_include(<experimental/coroutine>))
+-#define FOLLY_HAS_COROUTINES 1
++#define FOLLY_HAS_COROUTINES 0
+ // This is mainly to workaround bugs triggered by LTO, when stack allocated
+ // variables in await_suspend end up on a coroutine frame.
+ #define FOLLY_CORO_AWAIT_SUSPEND_NONTRIVIAL_ATTRIBUTES FOLLY_NOINLINE

environment/toolchain/v5/folly-2023.09.25.00.patch

@@ -0,0 +1,26 @@
+diff --git a/folly/CMakeLists.txt b/folly/CMakeLists.txt
+index e0e16df..471131e 100644
+--- a/folly/CMakeLists.txt
++++ b/folly/CMakeLists.txt
+@@ -28,7 +28,7 @@ install(
+ )
+ 
+ add_subdirectory(experimental/exception_tracer)
+-add_subdirectory(logging/example)
++# add_subdirectory(logging/example)
+ 
+ if (PYTHON_EXTENSIONS)
+   # Create tree of symbolic links in structure required for successful
+diff --git a/folly/Portability.h b/folly/Portability.h
+index 365ef1b..42d24b8 100644
+--- a/folly/Portability.h
++++ b/folly/Portability.h
+@@ -560,7 +560,7 @@ constexpr auto kCpplibVer = 0;
+     (defined(__cpp_coroutines) && __cpp_coroutines >= 201703L) ||          \
+     (defined(__cpp_impl_coroutine) && __cpp_impl_coroutine >= 201902L)) && \
+     (__has_include(<coroutine>) || __has_include(<experimental/coroutine>))
+-#define FOLLY_HAS_COROUTINES 1
++#define FOLLY_HAS_COROUTINES 0
+ // This is mainly to workaround bugs triggered by LTO, when stack allocated
+ // variables in await_suspend end up on a coroutine frame.
+ #define FOLLY_CORO_AWAIT_SUSPEND_NONTRIVIAL_ATTRIBUTES FOLLY_NOINLINE

environment/toolchain/v5/snappy.patch

@@ -0,0 +1,29 @@
+diff -ur a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2021-05-05 00:53:34.000000000 +0200
++++ b/CMakeLists.txt	2022-01-27 17:18:34.758302398 +0100
+@@ -52,9 +52,9 @@
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
+   add_definitions(-D_HAS_EXCEPTIONS=0)
+
+-  # Disable RTTI.
+-  string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
++  # # Disable RTTI.
++  # string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
++  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
+ else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+   # Use -Wall for clang and gcc.
+   if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
+@@ -77,9 +77,9 @@
+   string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
+
+-  # Disable RTTI.
+-  string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
++  # # Disable RTTI.
++  # string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
++  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
+ endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+
+ # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make

environment/toolchain/v5/xz_pgp.txt

@@ -0,0 +1,75 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mQINBEzEOZIBEACxg/IuXERlDB48JBWmF4NxNUuuup1IhJAJyFGFSKh3OGAO2Ard
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+sNUMM02CphABzl/LCLnumr0eyQQ/weV4twEhLwSDmqLYHL0EdYW0Y3CnnU9vmYxQ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+=asTC
+-----END PGP PUBLIC KEY BLOCK-----

include/_mgp.hpp

@@ -255,6 +255,16 @@ inline mgp_edge *graph_create_edge(mgp_graph *graph, mgp_vertex *from, mgp_verte
   return MgInvoke<mgp_edge *>(mgp_graph_create_edge, graph, from, to, type, memory);
 }
 
+inline mgp_edge *graph_edge_set_from(struct mgp_graph *graph, struct mgp_edge *e, struct mgp_vertex *new_from,
+                                     mgp_memory *memory) {
+  return MgInvoke<mgp_edge *>(mgp_graph_edge_set_from, graph, e, new_from, memory);
+}
+
+inline mgp_edge *graph_edge_set_to(struct mgp_graph *graph, struct mgp_edge *e, struct mgp_vertex *new_to,
+                                   mgp_memory *memory) {
+  return MgInvoke<mgp_edge *>(mgp_graph_edge_set_to, graph, e, new_to, memory);
+}
+
 inline void graph_delete_edge(mgp_graph *graph, mgp_edge *edge) { MgInvokeVoid(mgp_graph_delete_edge, graph, edge); }
 
 inline mgp_vertex *graph_get_vertex_by_id(mgp_graph *g, mgp_vertex_id id, mgp_memory *memory) {
@@ -367,6 +377,10 @@ inline mgp_map_item *map_items_iterator_next(mgp_map_items_iterator *it) {
 
 inline mgp_vertex_id vertex_get_id(mgp_vertex *v) { return MgInvoke<mgp_vertex_id>(mgp_vertex_get_id, v); }
 
+inline size_t vertex_get_in_degree(mgp_vertex *v) { return MgInvoke<size_t>(mgp_vertex_get_in_degree, v); }
+
+inline size_t vertex_get_out_degree(mgp_vertex *v) { return MgInvoke<size_t>(mgp_vertex_get_out_degree, v); }
+
 inline mgp_vertex *vertex_copy(mgp_vertex *v, mgp_memory *memory) {
   return MgInvoke<mgp_vertex *>(mgp_vertex_copy, v, memory);
 }
@@ -401,6 +415,10 @@ inline void vertex_set_property(mgp_vertex *v, const char *property_name, mgp_va
   MgInvokeVoid(mgp_vertex_set_property, v, property_name, property_value);
 }
 
+inline void vertex_set_properties(mgp_vertex *v, struct mgp_map *properties) {
+  MgInvokeVoid(mgp_vertex_set_properties, v, properties);
+}
+
 inline mgp_properties_iterator *vertex_iter_properties(mgp_vertex *v, mgp_memory *memory) {
   return MgInvoke<mgp_properties_iterator *>(mgp_vertex_iter_properties, v, memory);
 }
@@ -437,6 +455,10 @@ inline void edge_set_property(mgp_edge *e, const char *property_name, mgp_value
   MgInvokeVoid(mgp_edge_set_property, e, property_name, property_value);
 }
 
+inline void edge_set_properties(mgp_edge *e, struct mgp_map *properties) {
+  MgInvokeVoid(mgp_edge_set_properties, e, properties);
+}
+
 inline mgp_properties_iterator *edge_iter_properties(mgp_edge *e, mgp_memory *memory) {
   return MgInvoke<mgp_properties_iterator *>(mgp_edge_iter_properties, e, memory);
 }
@@ -455,6 +477,8 @@ inline void path_destroy(mgp_path *path) { mgp_path_destroy(path); }
 
 inline void path_expand(mgp_path *path, mgp_edge *edge) { MgInvokeVoid(mgp_path_expand, path, edge); }
 
+inline void path_pop(mgp_path *path) { MgInvokeVoid(mgp_path_pop, path); }
+
 inline size_t path_size(mgp_path *path) { return MgInvoke<size_t>(mgp_path_size, path); }
 
 inline mgp_vertex *path_vertex_at(mgp_path *path, size_t index) {

include/_mgp_mock.py

@@ -333,6 +333,13 @@ class Path:
         self._vertices.append(edge.end_id)
         self._edges.append((edge.start_id, edge.end_id, edge.id))
 
+    def pop(self):
+        if not self._edges:
+            raise IndexError("Path contains no relationships.")
+
+        self._vertices.pop()
+        self._edges.pop()
+
     def vertex_at(self, index: int) -> Vertex:
         return Vertex(self._vertices[index], self._graph)
 

include/mg_procedure.h

@@ -543,6 +543,10 @@ void mgp_path_destroy(struct mgp_path *path);
 /// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if unable to allocate memory for path extension.
 enum mgp_error mgp_path_expand(struct mgp_path *path, struct mgp_edge *edge);
 
+/// Remove the last node and the last relationship from the path.
+/// Return mgp_error::MGP_ERROR_OUT_OF_RANGE if the path contains no relationships.
+enum mgp_error mgp_path_pop(struct mgp_path *path);
+
 /// Get the number of edges in a mgp_path.
 /// Current implementation always returns without errors.
 enum mgp_error mgp_path_size(struct mgp_path *path, size_t *result);
@@ -647,6 +651,12 @@ struct mgp_vertex_id {
 /// Get the ID of given vertex.
 enum mgp_error mgp_vertex_get_id(struct mgp_vertex *v, struct mgp_vertex_id *result);
 
+/// Get the in degree of given vertex.
+enum mgp_error mgp_vertex_get_in_degree(struct mgp_vertex *v, size_t *result);
+
+/// Get the out degree of given vertex.
+enum mgp_error mgp_vertex_get_out_degree(struct mgp_vertex *v, size_t *result);
+
 /// Result is non-zero if the vertex can be modified.
 /// The mutability of the vertex is the same as the graph which it is part of. If a vertex is immutable, then edges
 /// cannot be created or deleted, properties and labels cannot be set or removed and all of the returned edges will be
@@ -664,6 +674,15 @@ enum mgp_error mgp_vertex_underlying_graph_is_mutable(struct mgp_vertex *v, int
 enum mgp_error mgp_vertex_set_property(struct mgp_vertex *v, const char *property_name,
                                        struct mgp_value *property_value);
 
+/// Set the value of properties on a vertex.
+/// When the value is `null`, then the property is removed from the vertex.
+/// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if unable to allocate memory for storing the property.
+/// Return mgp_error::MGP_ERROR_IMMUTABLE_OBJECT if `v` is immutable.
+/// Return mgp_error::MGP_ERROR_DELETED_OBJECT if `v` has been deleted.
+/// Return mgp_error::MGP_ERROR_SERIALIZATION_ERROR if `v` has been modified by another transaction.
+/// Return mgp_error::MGP_ERROR_VALUE_CONVERSION if `property_value` is vertex, edge or path.
+enum mgp_error mgp_vertex_set_properties(struct mgp_vertex *v, struct mgp_map *properties);
+
 /// Add the label to the vertex.
 /// If the vertex already has the label, this function does nothing.
 /// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if unable to allocate memory for storing the label.
@@ -814,6 +833,15 @@ enum mgp_error mgp_edge_get_property(struct mgp_edge *e, const char *property_na
 /// Return mgp_error::MGP_ERROR_VALUE_CONVERSION if `property_value` is vertex, edge or path.
 enum mgp_error mgp_edge_set_property(struct mgp_edge *e, const char *property_name, struct mgp_value *property_value);
 
+/// Set the value of properties on a vertex.
+/// When the value is `null`, then the property is removed from the vertex.
+/// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if unable to allocate memory for storing the property.
+/// Return mgp_error::MGP_ERROR_IMMUTABLE_OBJECT if `v` is immutable.
+/// Return mgp_error::MGP_ERROR_DELETED_OBJECT if `v` has been deleted.
+/// Return mgp_error::MGP_ERROR_SERIALIZATION_ERROR if `v` has been modified by another transaction.
+/// Return mgp_error::MGP_ERROR_VALUE_CONVERSION if `property_value` is vertex, edge or path.
+enum mgp_error mgp_edge_set_properties(struct mgp_edge *e, struct mgp_map *properties);
+
 /// Start iterating over properties stored in the given edge.
 /// The properties of the edge are copied when the iterator is created, therefore later changes won't affect them.
 /// Resulting mgp_properties_iterator needs to be deallocated with
@@ -864,6 +892,22 @@ enum mgp_error mgp_graph_detach_delete_vertex(struct mgp_graph *graph, struct mg
 enum mgp_error mgp_graph_create_edge(struct mgp_graph *graph, struct mgp_vertex *from, struct mgp_vertex *to,
                                      struct mgp_edge_type type, struct mgp_memory *memory, struct mgp_edge **result);
 
+/// Change edge from vertex
+/// Return mgp_error::MGP_ERROR_IMMUTABLE_OBJECT if `graph` is immutable.
+/// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if unable to allocate a mgp_edge.
+/// Return mgp_error::MGP_ERROR_DELETED_OBJECT if `from` or `to` has been deleted.
+/// Return mgp_error::MGP_ERROR_SERIALIZATION_ERROR if `from` or `to` has been modified by another transaction.
+enum mgp_error mgp_graph_edge_set_from(struct mgp_graph *graph, struct mgp_edge *e, struct mgp_vertex *new_from,
+                                       struct mgp_memory *memory, struct mgp_edge **result);
+
+/// Change edge to vertex
+/// Return mgp_error::MGP_ERROR_IMMUTABLE_OBJECT if `graph` is immutable.
+/// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if unable to allocate a mgp_edge.
+/// Return mgp_error::MGP_ERROR_DELETED_OBJECT if `from` or `to` has been deleted.
+/// Return mgp_error::MGP_ERROR_SERIALIZATION_ERROR if `from` or `to` has been modified by another transaction.
+enum mgp_error mgp_graph_edge_set_to(struct mgp_graph *graph, struct mgp_edge *e, struct mgp_vertex *new_to,
+                                     struct mgp_memory *memory, struct mgp_edge **result);
+
 /// Delete an edge from the graph.
 /// Return mgp_error::MGP_ERROR_IMMUTABLE_OBJECT if `graph` is immutable.
 /// Return mgp_error::MGP_ERROR_SERIALIZATION_ERROR if `edge`, its source or destination vertex has been modified by

include/mgp.py

@@ -479,6 +479,12 @@ class Properties:
         except KeyError:
             return False
 
+    def set_properties(self, properties: dict) -> None:
+        if not self._vertex_or_edge.is_valid():
+            raise InvalidContextError()
+
+        self._vertex_or_edge.set_properties(properties)
+
 
 class EdgeType:
     """Type of an Edge."""
@@ -977,6 +983,24 @@ class Path:
         self._vertices = None
         self._edges = None
 
+    def pop(self):
+        """
+        Remove the last node and the last relationship from the path.
+
+        Raises:
+            InvalidContextError: If using an invalid `Path` instance
+            OutOfRangeError: If the path contains no relationships.
+
+        Examples:
+            ```path.pop()```
+        """
+        if not self.is_valid():
+            raise InvalidContextError()
+        self._path.pop()
+        # Invalidate our cached tuples
+        self._vertices = None
+        self._edges = None
+
     @property
     def vertices(self) -> typing.Tuple[Vertex, ...]:
         """
@@ -1017,6 +1041,10 @@ class Path:
             self._edges = tuple(Edge(self._path.edge_at(i)) for i in range(num_edges))
         return self._edges
 
+    @property
+    def length(self) -> int:
+        return self._path.size()
+
 
 class Record:
     """Represents a record of resulting field values."""

include/mgp_mock.py

@@ -929,6 +929,25 @@ class Path:
         self._vertices = None
         self._edges = None
 
+    def pop(self):
+        """
+        Remove the last node and the last relationship from the path.
+
+        Raises:
+            InvalidContextError: If using an invalid `Path` instance
+            OutOfRangeError: If the path contains no relationships.
+
+        Examples:
+            ```path.pop()```
+        """
+        if not self.is_valid():
+            raise InvalidContextError()
+        self._path.pop()
+
+        # Invalidate cached tuples
+        self._vertices = None
+        self._edges = None
+
     @property
     def vertices(self) -> typing.Tuple[Vertex, ...]:
         """

libs/CMakeLists.txt

@@ -261,3 +261,7 @@ import_external_library(librdtsc STATIC
 
 # setup ctre
 import_header_library(ctre ${CMAKE_CURRENT_SOURCE_DIR})
+
+# setup absl (cmake sub_directory tolerant)
+set(ABSL_PROPAGATE_CXX_STD ON)
+add_subdirectory(absl EXCLUDE_FROM_ALL)

libs/setup.sh

@@ -123,6 +123,7 @@ declare -A primary_urls=(
   ["pulsar"]="http://$local_cache_host/git/pulsar.git"
   ["librdtsc"]="http://$local_cache_host/git/librdtsc.git"
   ["ctre"]="http://$local_cache_host/file/hanickadot/compile-time-regular-expressions/v3.7.2/single-header/ctre.hpp"
+  ["absl"]="https://$local_cache_host/git/abseil-cpp.git"
 )
 
 # The goal of secondary urls is to have links to the "source of truth" of
@@ -140,7 +141,7 @@ declare -A secondary_urls=(
   ["rocksdb"]="https://github.com/facebook/rocksdb.git"
   ["mgclient"]="https://github.com/memgraph/mgclient.git"
   ["pymgclient"]="https://github.com/memgraph/pymgclient.git"
-  ["mgconsole"]="http://github.com/memgraph/mgconsole.git"
+  ["mgconsole"]="https://github.com/memgraph/mgconsole.git"
   ["spdlog"]="https://github.com/gabime/spdlog"
   ["nlohmann"]="https://raw.githubusercontent.com/nlohmann/json/4f8fba14066156b73f1189a2b8bd568bde5284c5/single_include/nlohmann/json.hpp"
   ["neo4j"]="https://dist.neo4j.org/neo4j-community-5.6.0-unix.tar.gz"
@@ -149,6 +150,7 @@ declare -A secondary_urls=(
   ["pulsar"]="https://github.com/apache/pulsar.git"
   ["librdtsc"]="https://github.com/gabrieleara/librdtsc.git"
   ["ctre"]="https://raw.githubusercontent.com/hanickadot/compile-time-regular-expressions/v3.7.2/single-header/ctre.hpp"
+  ["absl"]="https://github.com/abseil/abseil-cpp.git"
 )
 
 # antlr
@@ -246,3 +248,7 @@ mkdir -p ctre
 cd ctre
 file_get_try_double "${primary_urls[ctre]}" "${secondary_urls[ctre]}"
 cd ..
+
+# abseil 20230125.3
+absl_ref="20230125.3"
+repo_clone_try_double "${primary_urls[absl]}" "${secondary_urls[absl]}" "absl" "$absl_ref"

licenses/BSL.txt

@@ -36,7 +36,7 @@ ADDITIONAL USE GRANT:   You may use the Licensed Work in accordance with the
                         3. using the Licensed Work to create a work or solution
                         which competes (or might reasonably be expected to
                         compete) with the Licensed Work.
-CHANGE DATE:            2027-02-08
+CHANGE DATE:            2027-13-09
 CHANGE LICENSE:         Apache License, Version 2.0
 
 For information about alternative licensing arrangements, please visit: https://memgraph.com/legal.

licenses/third-party/abseil-cpp/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        https://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
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+
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+          that You distribute, all copyright, patent, trademark, and
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+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       https://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

licenses/third-party/compile-time-regular-expressions/LICENSE

@@ -0,0 +1,218 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+    1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+    2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+    3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+    4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+    5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+    6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+    7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+    8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+    9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+    END OF TERMS AND CONDITIONS
+
+    APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+    Copyright [yyyy] [name of copyright owner]
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+
+--- LLVM Exceptions to the Apache 2.0 License ----
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into an Object form of such source code, you
+may redistribute such embedded portions in such Object form without complying
+with the conditions of Sections 4(a), 4(b) and 4(d) of the License.
+
+In addition, if you combine or link compiled forms of this Software with
+software that is licensed under the GPLv2 ("Combined Software") and if a
+court of competent jurisdiction determines that the patent provision (Section
+3), the indemnity provision (Section 9) or other Section of the License
+conflicts with the conditions of the GPLv2, you may retroactively and
+prospectively choose to deem waived or otherwise exclude such Section(s) of
+the License, but only in their entirety and only with respect to the Combined
+Software.

query_modules/example.cpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -18,7 +18,11 @@ void ProcImpl(std::vector<mgp::Value> arguments, mgp::Graph graph, mgp::RecordFa
 
 void SampleReadProc(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory) {
   try {
-    mgp::memory = memory;
+    // The outcommented way of assigning the memory pointer is still
+    // working, but it is deprecated because of certain concurrency
+    // issues. Please use the guard instead.
+    // mgp::memory = memory;
+    mgp::MemoryDispatcherGuard guard(memory);
 
     std::vector<mgp::Value> arguments;
     for (size_t i = 0; i < mgp::list_size(args); i++) {
@@ -34,7 +38,11 @@ void SampleReadProc(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *resul
 }
 
 void AddXNodes(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory) {
-  mgp::memory = memory;
+  // The outcommented way of assigning the memory pointer is still
+  // working, but it is deprecated because of certain concurrency
+  // issues. Please use the guard instead.
+  // mgp::memory = memory;
+  mgp::MemoryDispatcherGuard guard(memory);
   auto graph = mgp::Graph(memgraph_graph);
 
   std::vector<mgp::Value> arguments;
@@ -49,7 +57,11 @@ void AddXNodes(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mg
 }
 
 void Multiply(mgp_list *args, mgp_func_context *ctx, mgp_func_result *res, mgp_memory *memory) {
-  mgp::memory = memory;
+  // The outcommented way of assigning the memory pointer is still
+  // working, but it is deprecated because of certain concurrency
+  // issues. Please use the guard instead.
+  // mgp::memory = memory;
+  mgp::MemoryDispatcherGuard guard(memory);
 
   std::vector<mgp::Value> arguments;
   for (size_t i = 0; i < mgp::list_size(args); i++) {
@@ -67,7 +79,11 @@ void Multiply(mgp_list *args, mgp_func_context *ctx, mgp_func_result *res, mgp_m
 
 extern "C" int mgp_init_module(struct mgp_module *module, struct mgp_memory *memory) {
   try {
-    mgp::memory = memory;
+    // The outcommented way of assigning the memory pointer is still
+    // working, but it is deprecated because of certain concurrency
+    // issues. Please use the guard instead.
+    // mgp::memory = memory;
+    mgp::MemoryDispatcherGuard guard(memory);
 
     AddProcedure(SampleReadProc, "return_true", mgp::ProcedureType::Read,
                  {mgp::Parameter("param_1", mgp::Type::Int), mgp::Parameter("param_2", mgp::Type::Double, 2.3)},
@@ -77,7 +93,11 @@ extern "C" int mgp_init_module(struct mgp_module *module, struct mgp_memory *mem
   }
 
   try {
-    mgp::memory = memory;
+    // The outcommented way of assigning the memory pointer is still
+    // working, but it is deprecated because of certain concurrency
+    // issues. Please use the guard instead.
+    // mgp::memory = memory;
+    mgp::MemoryDispatcherGuard guard(memory);
 
     mgp::AddProcedure(AddXNodes, "add_x_nodes", mgp::ProcedureType::Write, {mgp::Parameter("param_1", mgp::Type::Int)},
                       {}, module, memory);
@@ -87,7 +107,11 @@ extern "C" int mgp_init_module(struct mgp_module *module, struct mgp_memory *mem
   }
 
   try {
-    mgp::memory = memory;
+    // The outcommented way of assigning the memory pointer is still
+    // working, but it is deprecated because of certain concurrency
+    // issues. Please use the guard instead.
+    // mgp::memory = memory;
+    mgp::MemoryDispatcherGuard guard(memory);
 
     mgp::AddFunction(Multiply, "multiply",
                      {mgp::Parameter("int", mgp::Type::Int), mgp::Parameter("int", mgp::Type::Int, (int64_t)3)}, module,

release/debian/conffiles

@@ -1,3 +1,4 @@
 /etc/memgraph/memgraph.conf
+/etc/memgraph/apoc_compatibility_mappings.json
 /etc/memgraph/auth_module/ldap.example.yaml
 /etc/logrotate.d/memgraph

release/package/run.sh

@@ -11,6 +11,12 @@ SUPPORTED_OS=(
     amzn-2
 )
 
+SUPPORTED_BUILD_TYPES=(
+    Debug
+    Release
+    RelWithDebInfo
+)
+
 PROJECT_ROOT="$SCRIPT_DIR/../.."
 TOOLCHAIN_VERSION="toolchain-v4"
 ACTIVATE_TOOLCHAIN="source /opt/${TOOLCHAIN_VERSION}/activate"
@@ -18,14 +24,16 @@ HOST_OUTPUT_DIR="$PROJECT_ROOT/build/output"
 
 print_help () {
     # TODO(gitbuda): Update the release/package/run.sh help
-    echo "$0 init|package|docker|test {os} [--for-docker|--for-platform]"
+    echo "$0 init|package|docker|test {os} {build_type} [--for-docker|--for-platform]"
     echo ""
     echo "    OSs: ${SUPPORTED_OS[*]}"
+    echo "    Build types: ${SUPPORTED_BUILD_TYPES[*]}"
     exit 1
 }
 
 make_package () {
     os="$1"
+    build_type="$2"
 
     build_container="mgbuild_$os"
     echo "Building Memgraph for $os on $build_container..."
@@ -44,10 +52,10 @@ make_package () {
         package_command=" cpack -G DEB --config ../CPackConfig.cmake "
     fi
     telemetry_id_override_flag=""
-    if [[ "$#" -gt 1 ]]; then
-        if [[ "$2" == "--for-docker" ]]; then
+    if [[ "$#" -gt 2 ]]; then
+        if [[ "$3" == "--for-docker" ]]; then
             telemetry_id_override_flag=" -DMG_TELEMETRY_ID_OVERRIDE=DOCKER "
-        elif [[ "$2" == "--for-platform" ]]; then
+        elif [[ "$3" == "--for-platform" ]]; then
             telemetry_id_override_flag=" -DMG_TELEMETRY_ID_OVERRIDE=DOCKER-PLATFORM"
         else
           print_help
@@ -89,9 +97,9 @@ make_package () {
     docker exec "$build_container" bash -c "cd $container_build_dir && rm -rf ./*"
     # TODO(gitbuda): cmake fails locally if remote is clone via ssh because of the key -> FIX
     if [[ "$os" =~ "-arm" ]]; then
-        docker exec "$build_container" bash -c "cd $container_build_dir && $ACTIVATE_TOOLCHAIN && cmake -DCMAKE_BUILD_TYPE=release -DMG_ARCH="ARM64" $telemetry_id_override_flag .."
+        docker exec "$build_container" bash -c "cd $container_build_dir && $ACTIVATE_TOOLCHAIN && cmake -DCMAKE_BUILD_TYPE=$build_type -DMG_ARCH="ARM64" $telemetry_id_override_flag .."
     else
-        docker exec "$build_container" bash -c "cd $container_build_dir && $ACTIVATE_TOOLCHAIN && cmake -DCMAKE_BUILD_TYPE=release $telemetry_id_override_flag .."
+        docker exec "$build_container" bash -c "cd $container_build_dir && $ACTIVATE_TOOLCHAIN && cmake -DCMAKE_BUILD_TYPE=$build_type $telemetry_id_override_flag .."
     fi
     # ' is used instead of " because we need to run make within the allowed
     # container resources.
@@ -141,20 +149,34 @@ case "$1" in
 
     package)
         shift 1
-        if [[ "$#" -lt 1 ]]; then
+        if [[ "$#" -lt 2 ]]; then
             print_help
         fi
         os="$1"
-        shift 1
+        build_type="$2"
+        shift 2
         is_os_ok=false
         for supported_os in "${SUPPORTED_OS[@]}"; do
             if [[ "$supported_os" == "${os}" ]]; then
                 is_os_ok=true
+                break
             fi
         done
-        if [[ "$is_os_ok" == true ]]; then
-            make_package "$os" "$@"
+        is_build_type_ok=false
+        for supported_build_type in "${SUPPORTED_BUILD_TYPES[@]}"; do
+            if [[ "$supported_build_type" == "${build_type}" ]]; then
+                is_build_type_ok=true
+                break
+            fi
+        done
+        if [[ "$is_os_ok" == true && "$is_build_type_ok" == true ]]; then
+            make_package "$os" "$build_type" "$@"
         else
+            if [[ "$is_os_ok" == false ]]; then
+                echo "Unsupported OS: $os"
+            elif [[ "$is_build_type_ok" == false ]]; then
+                echo "Unsupported build type: $build_type"
+            fi
             print_help
         fi
     ;;

release/rpm/memgraph.spec.in

@@ -132,6 +132,7 @@ echo "Don't forget to switch to the 'memgraph' user to use Memgraph" || exit 1
 # Override CPACK_RPM_ABSOLUTE_INSTALL_FILES with our %config(noreplace), cpack
 # uses plain %config.
 %config(noreplace) "/etc/memgraph/memgraph.conf"
+%config(noreplace) "/etc/memgraph/apoc_compatibility_mappings.json"
 %config(noreplace) "/etc/memgraph/auth_module/ldap.example.yaml"
 %config(noreplace) "/etc/logrotate.d/memgraph"
 

src/CMakeLists.txt

@@ -18,6 +18,10 @@ add_subdirectory(rpc)
 add_subdirectory(license)
 add_subdirectory(auth)
 add_subdirectory(audit)
+add_subdirectory(dbms)
+add_subdirectory(flags)
+add_subdirectory(distributed)
+add_subdirectory(replication)
 
 string(TOLOWER ${CMAKE_BUILD_TYPE} lower_build_type)
 
@@ -33,13 +37,11 @@ set(mg_single_node_v2_sources
         memgraph.cpp
 )
 
-set(mg_single_node_v2_libs stdc++fs Threads::Threads
-        mg-telemetry mg-query mg-communication mg-memory mg-utils mg-auth mg-license mg-settings mg-glue mg-audit)
-
 # memgraph main executable
 add_executable(memgraph ${mg_single_node_v2_sources})
 target_include_directories(memgraph PUBLIC ${CMAKE_SOURCE_DIR}/include)
-target_link_libraries(memgraph ${mg_single_node_v2_libs})
+target_link_libraries(memgraph stdc++fs Threads::Threads
+        mg-telemetry mg-communication mg-communication-metrics mg-memory mg-utils mg-license mg-settings mg-glue mg-flags)
 
 # NOTE: `include/mg_procedure.syms` describes a pattern match for symbols which
 # should be dynamically exported, so that `dlopen` can correctly link the
@@ -72,7 +74,7 @@ if(lower_build_type STREQUAL "release")
                 COMMENT "Stripping symbols and sections from memgraph")
 endif()
 
-# Generate the configuration file.
+# Generate the configuration file under the build directory.
 add_custom_command(TARGET memgraph POST_BUILD
         COMMAND ${CMAKE_SOURCE_DIR}/config/generate.py
         ${CMAKE_BINARY_DIR}/memgraph
@@ -81,6 +83,11 @@ add_custom_command(TARGET memgraph POST_BUILD
         ${CMAKE_SOURCE_DIR}/config/flags.yaml
         BYPRODUCTS ${CMAKE_BINARY_DIR}/config/memgraph.conf
         COMMENT "Generating memgraph configuration file")
+# Copy the mappings file to the build directory.
+add_custom_command(TARGET memgraph POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy
+        ${CMAKE_SOURCE_DIR}/config/mappings.json
+        ${CMAKE_BINARY_DIR}/config/apoc_compatibility_mappings.json)
 
 # Everything here is under "memgraph" install component.
 set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME "memgraph")
@@ -116,6 +123,9 @@ install(FILES ${CMAKE_SOURCE_DIR}/include/mgp.hpp
 # Install the config file (must use absolute path).
 install(FILES ${CMAKE_BINARY_DIR}/config/memgraph.conf
         DESTINATION /etc/memgraph RENAME memgraph.conf)
+# Install the mappings file (must use absolute path).
+install(FILES ${CMAKE_BINARY_DIR}/config/apoc_compatibility_mappings.json
+        DESTINATION /etc/memgraph RENAME apoc_compatibility_mappings.json)
 
 # Install logrotate configuration (must use absolute path).
 install(FILES ${CMAKE_SOURCE_DIR}/release/logrotate.conf

src/auth/exceptions.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -21,5 +21,6 @@ namespace memgraph::auth {
 class AuthException : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(AuthException)
 };
 }  // namespace memgraph::auth

src/communication/CMakeLists.txt

@@ -16,9 +16,13 @@ set(communication_src_files
 
 find_package(Boost REQUIRED)
 
+add_library(mg-communication-metrics STATIC metrics.cpp)
+target_link_libraries(mg-communication-metrics json)
+
 add_library(mg-communication STATIC ${communication_src_files})
-target_link_libraries(mg-communication Boost::headers Threads::Threads mg-utils mg-io mg-auth fmt::fmt gflags)
+target_link_libraries(mg-communication Boost::headers Threads::Threads mg-utils mg-io mg-auth fmt::fmt gflags mg-communication-metrics mg-events)
 
 find_package(OpenSSL REQUIRED)
 target_link_libraries(mg-communication ${OPENSSL_LIBRARIES})
 target_include_directories(mg-communication SYSTEM PUBLIC ${OPENSSL_INCLUDE_DIR})
+target_precompile_headers(mg-communication INTERFACE http/server.hpp <boost/beast/websocket.hpp> bolt/v1/session.hpp)

src/communication/bolt/client.cpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -264,4 +264,5 @@ bool Client::ReadMessageData(Marker marker, Value &ret) {
   }
   return false;
 }
+
 }  // namespace memgraph::communication::bolt

src/communication/bolt/client.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -38,6 +38,7 @@ class FailureResponseException : public utils::BasicException {
       : utils::BasicException{message}, code_{code} {}
 
   const std::string &code() const { return code_; }
+  SPECIALIZE_GET_EXCEPTION_NAME(FailureResponseException)
 
  private:
   std::string code_;
@@ -49,6 +50,7 @@ class FailureResponseException : public utils::BasicException {
 class ClientQueryException : public FailureResponseException {
  public:
   using FailureResponseException::FailureResponseException;
+  SPECIALIZE_GET_EXCEPTION_NAME(ClientQueryException)
 };
 
 /// This exception is thrown whenever a fatal error occurs during query
@@ -57,6 +59,7 @@ class ClientQueryException : public FailureResponseException {
 class ClientFatalException : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(ClientFatalException)
 };
 
 // Internal exception used whenever a communication error occurs. You should
@@ -64,6 +67,7 @@ class ClientFatalException : public utils::BasicException {
 class ServerCommunicationException : public ClientFatalException {
  public:
   ServerCommunicationException() : ClientFatalException("Couldn't communicate with the server!") {}
+  SPECIALIZE_GET_EXCEPTION_NAME(ServerCommunicationException)
 };
 
 // Internal exception used whenever a malformed data error occurs. You should
@@ -71,6 +75,7 @@ class ServerCommunicationException : public ClientFatalException {
 class ServerMalformedDataException : public ClientFatalException {
  public:
   ServerMalformedDataException() : ClientFatalException("The server sent malformed data!") {}
+  SPECIALIZE_GET_EXCEPTION_NAME(ServerMalformedDataException)
 };
 
 /// Structure that is used to return results from an executed query.
@@ -155,4 +160,5 @@ class Client final {
   ChunkedEncoderBuffer<communication::ClientOutputStream> encoder_buffer_{output_stream_};
   ClientEncoder encoder_{encoder_buffer_};
 };
+
 }  // namespace memgraph::communication::bolt

src/communication/bolt/metrics.hpp

@@ -0,0 +1,55 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#pragma once
+
+#include "communication/bolt/v1/value.hpp"
+#include "communication/metrics.hpp"
+
+namespace memgraph::communication::bolt {
+
+template <typename TSession>
+inline void RegisterNewSession(TSession &session, Value &metadata) {
+  auto &data = metadata.ValueMap();
+  session.metrics_ = bolt_metrics.Add(data.contains("user_agent") ? data["user_agent"].ValueString() : "unknown",
+                                      fmt::format("{}.{}", session.version_.major, session.version_.minor),
+                                      session.client_supported_bolt_versions_);
+  ++session.metrics_.value()->sessions;
+  auto conn_type = (!data.contains("scheme") || data["scheme"].ValueString() == "none")
+                       ? BoltMetrics::ConnectionType::kAnonymous
+                       : BoltMetrics::ConnectionType::kBasic;
+  ++session.metrics_.value()->connection_types[(int)conn_type];
+}
+
+template <typename TSession>
+inline void TouchNewSession(TSession &session, Value &metadata) {
+  auto &data = metadata.ValueMap();
+  session.metrics_ = bolt_metrics.Add(data.contains("user_agent") ? data["user_agent"].ValueString() : "unknown");
+}
+
+template <typename TSession>
+inline void UpdateNewSession(TSession &session, Value &metadata) {
+  auto &data = metadata.ValueMap();
+  session.metrics_.value()->bolt_v = fmt::format("{}.{}", session.version_.major, session.version_.minor);
+  session.metrics_.value()->supported_bolt_v = session.client_supported_bolt_versions_;
+  ++session.metrics_.value()->sessions;
+  auto conn_type = (!data.contains("scheme") || data["scheme"].ValueString() == "none")
+                       ? BoltMetrics::ConnectionType::kAnonymous
+                       : BoltMetrics::ConnectionType::kBasic;
+  ++session.metrics_.value()->connection_types[(int)conn_type];
+}
+
+template <typename TSession>
+inline void IncrementQueryMetrics(TSession &session) {
+  ++session.metrics_.value()->queries;
+}
+
+}  // namespace memgraph::communication::bolt

src/communication/bolt/v1/exceptions.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -30,6 +30,7 @@ namespace memgraph::communication::bolt {
 class ClientError : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(ClientError)
 };
 
 /**
@@ -67,6 +68,7 @@ class VerboseError : public utils::BasicException {
         code_(fmt::format("Memgraph.{}.{}.{}", ClassificationToString(classification), category, title)) {}
 
   const std::string &code() const noexcept { return code_; }
+  SPECIALIZE_GET_EXCEPTION_NAME(VerboseError)
 
  private:
   std::string ClassificationToString(Classification classification) {

src/communication/bolt/v1/session.hpp

@@ -27,6 +27,7 @@
 #include "communication/bolt/v1/states/handshake.hpp"
 #include "communication/bolt/v1/states/init.hpp"
 #include "communication/bolt/v1/value.hpp"
+#include "communication/metrics.hpp"
 #include "dbms/constants.hpp"
 #include "dbms/global.hpp"
 #include "utils/exceptions.hpp"
@@ -43,6 +44,7 @@ namespace memgraph::communication::bolt {
 class SessionException : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(SessionException)
 };
 
 /**
@@ -54,7 +56,7 @@ class SessionException : public utils::BasicException {
  * @tparam TOutputStream type of output stream that will be used
  */
 template <typename TInputStream, typename TOutputStream>
-class Session : public dbms::SessionInterface {
+class Session {
  public:
   using TEncoder = Encoder<ChunkedEncoderBuffer<TOutputStream>>;
 
@@ -159,6 +161,7 @@ class Session : public dbms::SessionInterface {
           break;
         case State::Idle:
         case State::Result:
+          at_least_one_run_ = true;
           state_ = StateExecutingRun(*this, state_);
           break;
         case State::Error:
@@ -180,6 +183,12 @@ class Session : public dbms::SessionInterface {
     }
   }
 
+  void HandleError() {
+    if (!at_least_one_run_) {
+      spdlog::info("Sudden connection loss. Make sure the client supports Memgraph.");
+    }
+  }
+
   // TODO: Rethink if there is a way to hide some members. At the momement all of them are public.
   TInputStream &input_stream_;
   TOutputStream &output_stream_;
@@ -192,6 +201,7 @@ class Session : public dbms::SessionInterface {
 
   bool handshake_done_{false};
   State state_{State::Handshake};
+  bool at_least_one_run_{false};
 
   struct Version {
     uint8_t major;
@@ -199,9 +209,11 @@ class Session : public dbms::SessionInterface {
   };
 
   Version version_;
+  std::vector<std::string> client_supported_bolt_versions_;
+  std::optional<BoltMetrics::Metrics> metrics_;
 
-  std::string GetDatabaseName() const override = 0;
-  std::string UUID() const final { return session_uuid_; }
+  virtual std::string GetCurrentDB() const = 0;
+  std::string UUID() const { return session_uuid_; }
 
  private:
   void ClientFailureInvalidData() {

src/communication/bolt/v1/states/handlers.hpp

@@ -18,6 +18,7 @@
 #include <string_view>
 #include <vector>
 
+#include "communication/bolt/metrics.hpp"
 #include "communication/bolt/v1/codes.hpp"
 #include "communication/bolt/v1/constants.hpp"
 #include "communication/bolt/v1/exceptions.hpp"
@@ -208,7 +209,10 @@ State HandleRunV1(TSession &session, const State state, const Marker marker) {
 
   DMG_ASSERT(!session.encoder_buffer_.HasData(), "There should be no data to write in this state");
 
-  spdlog::debug("[Run - {}] '{}'", session.GetDatabaseName(), query.ValueString());
+  spdlog::debug("[Run - {}] '{}'", session.GetCurrentDB(), query.ValueString());
+
+  // Increment number of queries in the metrics
+  IncrementQueryMetrics(session);
 
   try {
     // Interpret can throw.
@@ -272,7 +276,10 @@ State HandleRunV4(TSession &session, const State state, const Marker marker) {
     return HandleFailure(session, e);
   }
 
-  spdlog::debug("[Run - {}] '{}'", session.GetDatabaseName(), query.ValueString());
+  spdlog::debug("[Run - {}] '{}'", session.GetCurrentDB(), query.ValueString());
+
+  // Increment number of queries in the metrics
+  IncrementQueryMetrics(session);
 
   try {
     // Interpret can throw.

src/communication/bolt/v1/states/handshake.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -24,6 +24,31 @@
 
 namespace memgraph::communication::bolt {
 
+inline std::vector<std::string> StringifySupportedVersions(uint8_t *data) {
+  std::vector<std::string> res;
+  uint8_t range_i = 1;
+  uint8_t minor_i = 2;
+  uint8_t major_i = 3;
+  uint8_t chunk_size = 4;
+  uint8_t n_chunks = 4;
+  auto stringify_version = [](uint8_t major, uint8_t minor) { return fmt::format("{}.{}", major, minor); };
+  for (uint8_t i = 0; i < n_chunks; ++i) {
+    const uint32_t full_version = *((uint32_t *)data);
+    if (full_version == 0) break;
+    if (data[1] != 0) {  // Supports a range of versions
+      uint8_t range = data[range_i];
+      auto max_minor = data[minor_i];
+      for (uint8_t r = 0; r <= range; ++r) {
+        res.push_back(stringify_version(data[major_i], max_minor - r));
+      }
+    } else {
+      res.push_back(stringify_version(data[major_i], data[minor_i]));
+    }
+    data += chunk_size;
+  }
+  return res;
+}
+
 inline bool CopyProtocolInformationIfSupported(uint16_t version, uint8_t *protocol) {
   const auto *supported_version = std::find(std::begin(kSupportedVersions), std::end(kSupportedVersions), version);
   if (supported_version != std::end(kSupportedVersions)) {
@@ -71,6 +96,8 @@ State StateHandshakeRun(TSession &session) {
   auto dataPosition = session.input_stream_.data() + sizeof(kPreamble);
   uint8_t protocol[4] = {0x00};
 
+  session.client_supported_bolt_versions_ = std::move(StringifySupportedVersions(dataPosition));
+
   for (int i = 0; i < 4 && !protocol[3]; ++i) {
     // If there is an offset defined (e.g. 0x00 0x03 0x03 0x04) the second byte
     // That would enable the client to pick between 4.0 and 4.3 versions

src/communication/bolt/v1/states/init.hpp

@@ -11,6 +11,7 @@
 
 #pragma once
 
+#include <fmt/core.h>
 #include <fmt/format.h>
 #include <optional>
 
@@ -18,6 +19,7 @@
 #include "communication/bolt/v1/state.hpp"
 #include "communication/bolt/v1/value.hpp"
 #include "communication/exceptions.hpp"
+#include "communication/metrics.hpp"
 #include "spdlog/spdlog.h"
 #include "utils/likely.hpp"
 #include "utils/logging.hpp"
@@ -174,7 +176,7 @@ State SendSuccessMessage(TSession &session) {
   // we send a hardcoded value for now.
   std::map<std::string, Value> metadata{{"connection_id", "bolt-1"}};
   if (auto server_name = session.GetServerNameForInit(); server_name) {
-    metadata.insert({"server", *server_name});
+    metadata.insert({"server", std::move(*server_name)});
   }
   bool success_sent = session.encoder_.MessageSuccess(metadata);
   if (!success_sent) {
@@ -201,6 +203,9 @@ State StateInitRunV1(TSession &session, const Marker marker, const Signature sig
     return result.value();
   }
 
+  // Register session to metrics
+  RegisterNewSession(session, *maybeMetadata);
+
   return SendSuccessMessage(session);
 }
 
@@ -227,6 +232,9 @@ State StateInitRunV4(TSession &session, Marker marker, Signature signature) {
     return result.value();
   }
 
+  // Register session to metrics
+  RegisterNewSession(session, *maybeMetadata);
+
   return SendSuccessMessage(session);
 }
 
@@ -247,6 +255,10 @@ State StateInitRunV5(TSession &session, Marker marker, Signature signature) {
     if (SendSuccessMessage(session) == State::Close) {
       return State::Close;
     }
+
+    // Register session to metrics
+    TouchNewSession(session, *maybeMetadata);
+
     // Stay in Init
     return State::Init;
   }
@@ -274,6 +286,10 @@ State StateInitRunV5(TSession &session, Marker marker, Signature signature) {
     if (SendSuccessMessage(session) == State::Close) {
       return State::Close;
     }
+
+    // Register session to metrics
+    UpdateNewSession(session, *maybeMetadata);
+
     return State::Idle;
   }
 

src/communication/bolt/v1/value.hpp

@@ -276,6 +276,7 @@ class ValueException : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
   ValueException() : BasicException("Incompatible template param and type!") {}
+  SPECIALIZE_GET_EXCEPTION_NAME(ValueException)
 };
 
 /**

src/communication/buffer.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -43,6 +43,7 @@ class Buffer final {
   Buffer(Buffer &&) = delete;
   Buffer &operator=(const Buffer &) = delete;
   Buffer &operator=(Buffer &&) = delete;
+  ~Buffer() = default;
 
   /**
    * This class provides all functions from the buffer that are needed to allow
@@ -50,12 +51,13 @@ class Buffer final {
    */
   class ReadEnd {
    public:
-    ReadEnd(Buffer *buffer);
+    explicit ReadEnd(Buffer *buffer);
 
     ReadEnd(const ReadEnd &) = delete;
     ReadEnd(ReadEnd &&) = delete;
     ReadEnd &operator=(const ReadEnd &) = delete;
     ReadEnd &operator=(ReadEnd &&) = delete;
+    ~ReadEnd() = default;
 
     uint8_t *data();
 
@@ -77,12 +79,13 @@ class Buffer final {
    */
   class WriteEnd {
    public:
-    WriteEnd(Buffer *buffer);
+    explicit WriteEnd(Buffer *buffer);
 
     WriteEnd(const WriteEnd &) = delete;
     WriteEnd(WriteEnd &&) = delete;
     WriteEnd &operator=(const WriteEnd &) = delete;
     WriteEnd &operator=(WriteEnd &&) = delete;
+    ~WriteEnd() = default;
 
     io::network::StreamBuffer Allocate();
 

src/communication/client.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -15,6 +15,10 @@
 #include <openssl/err.h>
 #include <openssl/ssl.h>
 
+// Centos 7 OpenSSL includes libkrb5 which has brings in macros TRUE and FALSE. undef to prevent issues.
+#undef TRUE
+#undef FALSE
+
 #include "communication/buffer.hpp"
 #include "communication/context.hpp"
 #include "communication/init.hpp"

src/communication/context.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -17,6 +17,10 @@
 #include <openssl/ssl.h>
 #include <boost/asio/ssl/context.hpp>
 
+// Centos 7 OpenSSL includes libkrb5 which has brings in macros TRUE and FALSE. undef to prevent issues.
+#undef TRUE
+#undef FALSE
+
 namespace memgraph::communication {
 
 /**

src/communication/exceptions.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -21,5 +21,6 @@ namespace memgraph::communication {
  */
 class SessionClosedException : public utils::BasicException {
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(SessionClosedException)
 };
 }  // namespace memgraph::communication

src/communication/http/server.hpp

@@ -26,10 +26,7 @@ class Server final {
   using tcp = boost::asio::ip::tcp;
 
  public:
-  explicit Server(io::network::Endpoint endpoint, TSessionContext *session_context, ServerContext *context)
-      : listener_{Listener<TRequestHandler, TSessionContext>::Create(
-            ioc_, session_context, context,
-            tcp::endpoint{boost::asio::ip::make_address(endpoint.address), endpoint.port})} {}
+  explicit Server(io::network::Endpoint endpoint, TSessionContext *session_context, ServerContext *context);
 
   Server(const Server &) = delete;
   Server(Server &&) = delete;
@@ -41,11 +38,7 @@ class Server final {
               "Server wasn't shutdown properly");
   }
 
-  void Start() {
-    MG_ASSERT(!background_thread_, "The server was already started!");
-    listener_->Run();
-    background_thread_.emplace([this] { ioc_.run(); });
-  }
+  void Start();
 
   void Shutdown() { ioc_.stop(); }
 
@@ -55,7 +48,7 @@ class Server final {
     }
   }
   bool IsRunning() const { return background_thread_ && !ioc_.stopped(); }
-  tcp::endpoint GetEndpoint() const { return listener_->GetEndpoint(); }
+  tcp::endpoint GetEndpoint() const;
 
  private:
   boost::asio::io_context ioc_;
@@ -63,4 +56,22 @@ class Server final {
   std::shared_ptr<Listener<TRequestHandler, TSessionContext>> listener_;
   std::optional<std::thread> background_thread_;
 };
+template <class TRequestHandler, typename TSessionContext>
+Server<TRequestHandler, TSessionContext>::Server(io::network::Endpoint endpoint, TSessionContext *session_context,
+                                                 ServerContext *context)
+    : listener_{Listener<TRequestHandler, TSessionContext>::Create(
+          ioc_, session_context, context,
+          tcp::endpoint{boost::asio::ip::make_address(endpoint.address), endpoint.port})} {}
+
+template <class TRequestHandler, typename TSessionContext>
+void Server<TRequestHandler, TSessionContext>::Start() {
+  MG_ASSERT(!background_thread_, "The server was already started!");
+  listener_->Run();
+  background_thread_.emplace([this] { ioc_.run(); });
+}
+
+template <class TRequestHandler, typename TSessionContext>
+boost::asio::ip::tcp::endpoint Server<TRequestHandler, TSessionContext>::GetEndpoint() const {
+  return listener_->GetEndpoint();
+}
 }  // namespace memgraph::communication::http

src/communication/metrics.cpp

@@ -0,0 +1,42 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#include "metrics.hpp"
+
+namespace {
+constexpr auto kName = "name";
+constexpr auto kSupportedBoltVersions = "supported_bolt_versions";
+constexpr auto kBoltVersion = "bolt_version";
+constexpr auto kConnectionTypes = "connection_types";
+constexpr auto kSessions = "sessions";
+constexpr auto kQueries = "queries";
+}  // namespace
+namespace memgraph::communication {
+
+// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
+BoltMetrics bolt_metrics;
+
+nlohmann::json BoltMetrics::Info::ToJson() const {
+  nlohmann::json res;
+
+  res[kName] = name;
+  res[kSupportedBoltVersions] = nlohmann::json::array();
+  for (const auto &sbv : supported_bolt_v) {
+    res[kSupportedBoltVersions].push_back(sbv);
+  }
+  res[kBoltVersion] = bolt_v;
+  res[kConnectionTypes] = {{ConnectionTypeStr((ConnectionType)0), connection_types[0].load()},
+                           {ConnectionTypeStr((ConnectionType)1), connection_types[1].load()}};
+  res[kSessions] = sessions.load();
+  res[kQueries] = queries.load();
+  return res;
+}
+}  // namespace memgraph::communication

src/communication/metrics.hpp

@@ -0,0 +1,116 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#pragma once
+
+#include <atomic>
+#include <map>
+#include <mutex>
+#include <shared_mutex>
+#include <string>
+#include <vector>
+
+#include <json/json.hpp>
+
+namespace memgraph::communication {
+
+class BoltMetrics {
+ public:
+  enum class ConnectionType { kAnonymous = 0, kBasic, Count };
+  static constexpr std::array<std::string_view, (int)ConnectionType::Count> ct_to_str = {"anonymous", "basic"};
+  static std::string ConnectionTypeStr(ConnectionType type) { return std::string(ct_to_str[(int)type]); }
+  class Metrics;
+
+  struct Info {
+    explicit Info(std::string name) : name(std::move(name)) {}
+    Info(std::string name, std::string bolt_v, std::vector<std::string> supported_bolt_v)
+        : name(std::move(name)), bolt_v(std::move(bolt_v)), supported_bolt_v(std::move(supported_bolt_v)) {}
+
+    const std::string name;                                        //!< Driver name
+    std::string bolt_v;                                            //!< Bolt version used
+    std::vector<std::string> supported_bolt_v;                     //!< Bolt versions supported by the driver
+    std::atomic_int connection_types[(int)ConnectionType::Count];  //!< Authentication used when connecting
+    std::atomic_int sessions;                                      //!< Number of sessions using the same driver
+    std::atomic_int queries;                                       //!< Queries executed by the driver
+
+    nlohmann::json ToJson() const;
+
+   private:
+    friend class Metrics;
+    std::atomic_int concurrent_users;
+  };
+
+  class Metrics {
+    friend class BoltMetrics;
+    explicit Metrics(Info &info) : info_(&info) { ++info_->concurrent_users; }
+
+   public:
+    ~Metrics() {
+      if (info_) --info_->concurrent_users;
+    }
+
+    Metrics(const Metrics &other) : info_(other.info_) { ++info_->concurrent_users; }
+    Metrics(Metrics &&other) noexcept : info_(other.info_) { other.info_ = nullptr; }
+    Metrics &operator=(const Metrics &other) {
+      if (this != &other) {
+        if (info_) --info_->concurrent_users;
+        info_ = other.info_;
+        if (info_) ++info_->concurrent_users;
+      }
+      return *this;
+    }
+    Metrics &operator=(Metrics &&other) noexcept {
+      if (this != &other) {
+        if (info_) --info_->concurrent_users;
+        info_ = other.info_;
+        other.info_ = nullptr;  // Invalidate the source object
+      }
+      return *this;
+    }
+
+    Info *operator->() { return info_; }
+
+    Info *info_;
+  };
+
+  Metrics Add(std::string name) {
+    std::unique_lock<std::mutex> l(mtx);
+    auto key = name;
+    auto [it, _] = info.emplace(std::piecewise_construct, std::forward_as_tuple(std::move(key)),
+                                std::forward_as_tuple(std::move(name)));
+    return Metrics(it->second);
+  }
+
+  Metrics Add(std::string name, std::string bolt_v, std::vector<std::string> supported_bolt_v) {
+    std::unique_lock<std::mutex> l(mtx);
+    auto key = name;
+    auto [it, _] = info.emplace(std::piecewise_construct, std::forward_as_tuple(std::move(key)),
+                                std::forward_as_tuple(std::move(name), std::move(bolt_v), std::move(supported_bolt_v)));
+    return Metrics(it->second);
+  }
+
+  nlohmann::json ToJson() {
+    std::unique_lock<std::mutex> l(mtx);
+    auto res = nlohmann::json::array();
+    for (const auto &[_, client_info] : info) {
+      res.push_back(client_info.ToJson());
+    }
+    return res;
+  }
+
+ private:
+  mutable std::mutex mtx;
+  std::map<std::string, Info> info;
+};
+
+extern BoltMetrics bolt_metrics;
+
+}  // namespace memgraph::communication

src/communication/server.hpp

@@ -58,11 +58,11 @@ class Server final {
    * Constructs and binds server to endpoint, operates on session data and
    * invokes workers_count workers
    */
-  Server(const io::network::Endpoint &endpoint, TSessionContext *session_context, ServerContext *context,
+  Server(io::network::Endpoint endpoint, TSessionContext *session_context, ServerContext *context,
          int inactivity_timeout_sec, const std::string &service_name,
          size_t workers_count = std::thread::hardware_concurrency())
       : alive_(false),
-        endpoint_(endpoint),
+        endpoint_(std::move(endpoint)),
         listener_(session_context, context, inactivity_timeout_sec, service_name, workers_count),
         service_name_(service_name) {}
 

src/communication/session.hpp

@@ -22,6 +22,10 @@
 #include <openssl/err.h>
 #include <openssl/ssl.h>
 
+// Centos 7 OpenSSL includes libkrb5 which has brings in macros TRUE and FALSE. undef to prevent issues.
+#undef TRUE
+#undef FALSE
+
 #include "communication/buffer.hpp"
 #include "communication/context.hpp"
 #include "communication/exceptions.hpp"

src/communication/v2/server.hpp

@@ -73,40 +73,19 @@ class Server final {
    * invokes workers_count workers
    */
   Server(ServerEndpoint &endpoint, TSessionContext *session_context, ServerContext *server_context,
-         const int inactivity_timeout_sec, const std::string_view service_name,
-         size_t workers_count = std::thread::hardware_concurrency())
-      : endpoint_{endpoint},
-        service_name_{service_name},
-        context_thread_pool_{workers_count},
-        listener_{Listener<TSession, TSessionContext>::Create(context_thread_pool_.GetIOContext(), session_context,
-                                                              server_context, endpoint_, service_name_,
-                                                              inactivity_timeout_sec)} {}
+         int inactivity_timeout_sec, std::string_view service_name,
+         size_t workers_count = std::thread::hardware_concurrency());
 
-  ~Server() { MG_ASSERT(!IsRunning(), "Server wasn't shutdown properly"); }
+  ~Server();
 
   Server(const Server &) = delete;
   Server(Server &&) = delete;
   Server &operator=(const Server &) = delete;
   Server &operator=(Server &&) = delete;
 
-  const auto &Endpoint() const {
-    MG_ASSERT(IsRunning(), "You can't get the server endpoint when it's not running!");
-    return endpoint_;
-  }
+  const auto &Endpoint() const;
 
-  bool Start() {
-    if (IsRunning()) {
-      spdlog::error("The server is already running");
-      return false;
-    }
-    listener_->Start();
-
-    spdlog::info("{} server is fully armed and operational", service_name_);
-    spdlog::info("{} listening on {}", service_name_, endpoint_.address());
-    context_thread_pool_.Run();
-
-    return true;
-  }
+  bool Start();
 
   void Shutdown() {
     context_thread_pool_.Shutdown();
@@ -115,7 +94,7 @@ class Server final {
 
   void AwaitShutdown() { context_thread_pool_.AwaitShutdown(); }
 
-  bool IsRunning() const noexcept { return context_thread_pool_.IsRunning() && listener_->IsRunning(); }
+  bool IsRunning() const noexcept;
 
  private:
   ServerEndpoint endpoint_;
@@ -125,4 +104,46 @@ class Server final {
   std::shared_ptr<Listener<TSession, TSessionContext>> listener_;
 };
 
+template <typename TSession, typename TSessionContext>
+Server<TSession, TSessionContext>::~Server() {
+  MG_ASSERT(!IsRunning(), "Server wasn't shutdown properly");
+}
+
+template <typename TSession, typename TSessionContext>
+Server<TSession, TSessionContext>::Server(ServerEndpoint &endpoint, TSessionContext *session_context,
+                                          ServerContext *server_context, const int inactivity_timeout_sec,
+                                          const std::string_view service_name, size_t workers_count)
+    : endpoint_{endpoint},
+      service_name_{service_name},
+      context_thread_pool_{workers_count},
+      listener_{Listener<TSession, TSessionContext>::Create(context_thread_pool_.GetIOContext(), session_context,
+                                                            server_context, endpoint_, service_name_,
+                                                            inactivity_timeout_sec)} {}
+
+template <typename TSession, typename TSessionContext>
+bool Server<TSession, TSessionContext>::Start() {
+  if (IsRunning()) {
+    spdlog::error("The server is already running");
+    return false;
+  }
+  listener_->Start();
+
+  spdlog::info("{} server is fully armed and operational", service_name_);
+  spdlog::info("{} listening on {}", service_name_, endpoint_.address());
+  context_thread_pool_.Run();
+
+  return true;
+}
+
+template <typename TSession, typename TSessionContext>
+const auto &Server<TSession, TSessionContext>::Endpoint() const {
+  MG_ASSERT(IsRunning(), "You can't get the server endpoint when it's not running!");
+  return endpoint_;
+}
+
+template <typename TSession, typename TSessionContext>
+bool Server<TSession, TSessionContext>::IsRunning() const noexcept {
+  return context_thread_pool_.IsRunning() && listener_->IsRunning();
+}
+
 }  // namespace memgraph::communication::v2

src/communication/v2/session.hpp

@@ -110,11 +110,7 @@ class WebsocketSession : public std::enable_shared_from_this<WebsocketSession<TS
     return std::shared_ptr<WebsocketSession>(new WebsocketSession(std::forward<Args>(args)...));
   }
 
-#ifdef MG_ENTERPRISE
-  ~WebsocketSession() { session_context_->Delete(session_); }
-#else
   ~WebsocketSession() = default;
-#endif
 
   WebsocketSession(const WebsocketSession &) = delete;
   WebsocketSession &operator=(const WebsocketSession &) = delete;
@@ -171,14 +167,15 @@ class WebsocketSession : public std::enable_shared_from_this<WebsocketSession<TS
       : ws_(std::move(socket)),
         strand_{boost::asio::make_strand(ws_.get_executor())},
         output_stream_([this](const uint8_t *data, size_t len, bool /*have_more*/) { return Write(data, len); }),
-        session_{*session_context, endpoint, input_buffer_.read_end(), &output_stream_},
+        session_{session_context->ic,       endpoint, input_buffer_.read_end(), &output_stream_, session_context->auth,
+#ifdef MG_ENTERPRISE
+                 session_context->audit_log
+#endif
+        },
         session_context_{session_context},
         endpoint_{endpoint},
         remote_endpoint_{ws_.next_layer().socket().remote_endpoint()},
         service_name_{service_name} {
-#ifdef MG_ENTERPRISE
-    session_context_->Register(session_);
-#endif
   }
 
   void OnAccept(boost::beast::error_code ec) {
@@ -286,11 +283,7 @@ class Session final : public std::enable_shared_from_this<Session<TSession, TSes
     return std::shared_ptr<Session>(new Session(std::forward<Args>(args)...));
   }
 
-#ifdef MG_ENTERPRISE
-  ~Session() { session_context_->Delete(session_); }
-#else
   ~Session() = default;
-#endif
 
   Session(const Session &) = delete;
   Session(Session &&) = delete;
@@ -366,17 +359,17 @@ class Session final : public std::enable_shared_from_this<Session<TSession, TSes
       : socket_(CreateSocket(std::move(socket), server_context)),
         strand_{boost::asio::make_strand(GetExecutor())},
         output_stream_([this](const uint8_t *data, size_t len, bool have_more) { return Write(data, len, have_more); }),
-        session_{*session_context, endpoint, input_buffer_.read_end(), &output_stream_},
+        session_{session_context->ic,       endpoint, input_buffer_.read_end(), &output_stream_, session_context->auth,
+#ifdef MG_ENTERPRISE
+                 session_context->audit_log
+#endif
+        },
         session_context_{session_context},
         endpoint_{endpoint},
         remote_endpoint_{GetRemoteEndpoint()},
         service_name_{service_name},
         timeout_seconds_(inactivity_timeout_sec),
         timeout_timer_(GetExecutor()) {
-#ifdef MG_ENTERPRISE
-    // TODO Try to remove Register (see comment at SessionInterface declaration)
-    session_context_->Register(session_);
-#endif
     ExecuteForSocket([](auto &&socket) {
       socket.lowest_layer().set_option(tcp::no_delay(true));                         // enable PSH
       socket.lowest_layer().set_option(boost::asio::socket_base::keep_alive(true));  // enable SO_KEEPALIVE
@@ -413,6 +406,8 @@ class Session final : public std::enable_shared_from_this<Session<TSession, TSes
 
   void OnRead(const boost::system::error_code &ec, const size_t bytes_transferred) {
     if (ec) {
+      // TODO Check if client disconnected
+      session_.HandleError();
       return OnError(ec);
     }
     input_buffer_.write_end()->Written(bytes_transferred);

src/communication/websocket/session.cpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -175,6 +175,11 @@ void Session::OnRead(const boost::beast::error_code ec, const size_t /*bytes_tra
     return;
   }
 
+  if (ec) {
+    LogError(ec, "read");
+    return;
+  }
+
   if (!IsAuthenticated()) {
     auto response = nlohmann::json();
     auto auth_failed = [this, &response](const std::string &message) {

src/communication/websocket/session.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source

src/csv/include/csv/parsing.hpp

@@ -35,6 +35,7 @@ namespace memgraph::csv {
 
 class CsvReadException : public utils::BasicException {
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(CsvReadException)
 };
 
 class FileCsvSource {

src/data_structures/ring_buffer.hpp

@@ -1,4 +1,4 @@
-// Copyright 2022 Memgraph Ltd.
+// Copyright 2023 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -31,7 +31,7 @@
 template <typename TElement>
 class RingBuffer {
  public:
-  explicit RingBuffer(int capacity) : capacity_(capacity) { buffer_ = std::make_unique<TElement[]>(capacity_); }
+  explicit RingBuffer(int capacity) : capacity_(capacity), buffer_{std::make_unique<TElement[]>(capacity_)} {}
 
   RingBuffer(const RingBuffer &) = delete;
   RingBuffer(RingBuffer &&) = delete;

src/dbms/CMakeLists.txt

@@ -0,0 +1,3 @@
+
+add_library(mg-dbms STATIC database.cpp)
+target_link_libraries(mg-dbms mg-utils mg-storage-v2 mg-query)

src/dbms/database.cpp

@@ -0,0 +1,37 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#include "dbms/database.hpp"
+#include "flags/storage_mode.hpp"
+#include "storage/v2/disk/storage.hpp"
+#include "storage/v2/inmemory/storage.hpp"
+#include "storage/v2/storage_mode.hpp"
+
+template struct memgraph::utils::Gatekeeper<memgraph::dbms::Database>;
+
+namespace memgraph::dbms {
+
+Database::Database(const storage::Config &config)
+    : trigger_store_(config.durability.storage_directory / "triggers"),
+      streams_{config.durability.storage_directory / "streams"} {
+  if (config.storage_mode == memgraph::storage::StorageMode::ON_DISK_TRANSACTIONAL || config.force_on_disk ||
+      utils::DirExists(config.disk.main_storage_directory)) {
+    storage_ = std::make_unique<storage::DiskStorage>(config);
+  } else {
+    storage_ = std::make_unique<storage::InMemoryStorage>(config, config.storage_mode);
+  }
+}
+
+void Database::SwitchToOnDisk() {
+  storage_ = std::make_unique<memgraph::storage::DiskStorage>(std::move(storage_->config_));
+}
+
+}  // namespace memgraph::dbms

src/dbms/database.hpp

@@ -0,0 +1,168 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#pragma once
+
+#include <algorithm>
+#include <filesystem>
+#include <iterator>
+#include <memory>
+#include <optional>
+#include <string_view>
+#include <unordered_map>
+
+#include "query/cypher_query_interpreter.hpp"
+#include "query/stream/streams.hpp"
+#include "query/trigger.hpp"
+#include "storage/v2/storage.hpp"
+#include "utils/gatekeeper.hpp"
+
+namespace memgraph::dbms {
+
+struct DatabaseInfo {
+  storage::StorageInfo storage_info;
+  uint64_t triggers;
+  uint64_t streams;
+};
+
+static inline nlohmann::json ToJson(const DatabaseInfo &info) { return ToJson(info.storage_info); }
+
+/**
+ * @brief Class containing everything associated with a single Database
+ *
+ */
+class Database {
+ public:
+  /**
+   * @brief Construct a new Database object
+   *
+   * @param config storage configuration
+   */
+  explicit Database(const storage::Config &config);
+
+  /**
+   * @brief Returns the raw storage pointer.
+   * @note Ideally everybody would be using an accessor
+   * TODO: Remove
+   *
+   * @return storage::Storage*
+   */
+  storage::Storage *storage() { return storage_.get(); }
+
+  /**
+   * @brief Storage's Accessor
+   *
+   * @param override_isolation_level
+   * @return std::unique_ptr<storage::Storage::Accessor>
+   */
+  std::unique_ptr<storage::Storage::Accessor> Access(
+      std::optional<storage::IsolationLevel> override_isolation_level = {}) {
+    return storage_->Access(override_isolation_level);
+  }
+
+  std::unique_ptr<storage::Storage::Accessor> UniqueAccess(
+      std::optional<storage::IsolationLevel> override_isolation_level = {}) {
+    return storage_->UniqueAccess(override_isolation_level);
+  }
+
+  /**
+   * @brief Unique storage identified (name)
+   *
+   * @return const std::string&
+   */
+  const std::string &id() const { return storage_->id(); }
+
+  /**
+   * @brief Returns the storage configuration
+   *
+   * @return const storage::Config&
+   */
+  const storage::Config &config() const { return storage_->config_; }
+
+  /**
+   * @brief Get the storage mode
+   *
+   * @return storage::StorageMode
+   */
+  storage::StorageMode GetStorageMode() const { return storage_->GetStorageMode(); }
+
+  /**
+   * @brief Get the storage info
+   *
+   * @param force_directory Use the configured directory, do not try to decipher the multi-db version
+   * @return DatabaseInfo
+   */
+  DatabaseInfo GetInfo(bool force_directory = false) const {
+    DatabaseInfo info;
+    info.storage_info = storage_->GetInfo(force_directory);
+    info.triggers = trigger_store_.GetTriggerInfo().size();
+    info.streams = streams_.GetStreamInfo().size();
+    return info;
+  }
+
+  /**
+   * @brief Switch storage to OnDisk
+   *
+   */
+  void SwitchToOnDisk();
+
+  /**
+   * @brief Returns the raw TriggerStore pointer
+   *
+   * @return query::TriggerStore*
+   */
+  query::TriggerStore *trigger_store() { return &trigger_store_; }
+
+  /**
+   * @brief Returns the raw Streams pointer
+   *
+   * @return query::stream::Streams*
+   */
+  query::stream::Streams *streams() { return &streams_; }
+
+  /**
+   * @brief Returns the raw ThreadPool pointer (used for after commit triggers)
+   *
+   * @return utils::ThreadPool*
+   */
+  utils::ThreadPool *thread_pool() { return &after_commit_trigger_pool_; }
+
+  /**
+   * @brief Add task to the after commit trigger thread pool
+   *
+   * @param new_task
+   */
+  void AddTask(std::function<void()> new_task) { after_commit_trigger_pool_.AddTask(std::move(new_task)); }
+
+  /**
+   * @brief Returns the PlanCache vector raw pointer
+   *
+   * @return utils::SkipList<query::PlanCacheEntry>*
+   */
+  utils::SkipList<query::PlanCacheEntry> *plan_cache() { return &plan_cache_; }
+
+ private:
+  std::unique_ptr<storage::Storage> storage_;       //!< Underlying storage
+  query::TriggerStore trigger_store_;               //!< Triggers associated with the storage
+  utils::ThreadPool after_commit_trigger_pool_{1};  //!< Thread pool for executing after commit triggers
+  query::stream::Streams streams_;                  //!< Streams associated with the storage
+
+  // TODO: Move to a better place
+  utils::SkipList<query::PlanCacheEntry> plan_cache_;  //!< Plan cache associated with the storage
+};
+
+}  // namespace memgraph::dbms
+
+extern template struct memgraph::utils::Gatekeeper<memgraph::dbms::Database>;
+
+namespace memgraph::dbms {
+using DatabaseAccess = memgraph::utils::Gatekeeper<memgraph::dbms::Database>::Accessor;
+}  // namespace memgraph::dbms

src/dbms/database_handler.hpp

@@ -0,0 +1,97 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#pragma once
+
+#ifdef MG_ENTERPRISE
+
+#include <algorithm>
+#include <filesystem>
+#include <iterator>
+#include <memory>
+#include <optional>
+#include <string_view>
+#include <unordered_map>
+
+#include "dbms/database.hpp"
+
+#include "handler.hpp"
+
+namespace memgraph::dbms {
+
+/* NOTE
+ * The Database object is shared. All the higher-level function calls should be protected.
+ * Storage function calls should already be protected; add protection where needed.
+ *
+ * Current implementation uses a handler of Database objects. It owns them and gives
+ * Gatekeeper::Accessor to it. These guarantee that the object won't be
+ * destroyed unless no one is using it.
+ */
+
+/**Config
+ * @brief Multi-database storage handler
+ *
+ */
+class DatabaseHandler : public Handler<Database> {
+ public:
+  using HandlerT = Handler<Database>;
+
+  /**
+   * @brief Generate new storage associated with the passed name.
+   *
+   * @param name Name associating the new interpreter context
+   * @param config Storage configuration
+   * @return HandlerT::NewResult
+   */
+  HandlerT::NewResult New(std::string_view name, storage::Config config) {
+    // Control that no one is using the same data directory
+    if (std::any_of(begin(), end(), [&](auto &elem) {
+          auto db_acc = elem.second.access();
+          MG_ASSERT(db_acc.has_value(), "Gatekeeper in invalid state");
+          return db_acc->get()->config().durability.storage_directory == config.durability.storage_directory;
+        })) {
+      spdlog::info("Tried to generate new storage using a claimed directory.");
+      return NewError::EXISTS;
+    }
+    config.name = name;  // Set storage id via config
+    return HandlerT::New(std::piecewise_construct, name, config);
+  }
+
+  /**
+   * @brief All currently active storage.
+   *
+   * @return std::vector<std::string>
+   */
+  std::vector<std::string> All() const {
+    std::vector<std::string> res;
+    res.reserve(std::distance(cbegin(), cend()));
+    std::for_each(cbegin(), cend(), [&](const auto &elem) { res.push_back(elem.first); });
+    return res;
+  }
+
+  /**
+   * @brief Get the associated storage's configuration
+   *
+   * @param name
+   * @return std::optional<storage::Config>
+   */
+  std::optional<storage::Config> GetConfig(std::string_view name) {
+    auto db = Get(name);
+    if (db) {
+      return (*db)->config();
+    }
+    return std::nullopt;
+  }
+};
+
+}  // namespace memgraph::dbms
+
+#endif

src/dbms/dbms_handler.hpp

@@ -0,0 +1,449 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#pragma once
+
+#include <algorithm>
+#include <concepts>
+#include <cstdint>
+#include <filesystem>
+#include <memory>
+#include <mutex>
+#include <optional>
+#include <ostream>
+#include <stdexcept>
+#include <system_error>
+#include <unordered_map>
+
+#include "auth/auth.hpp"
+#include "constants.hpp"
+#include "dbms/database.hpp"
+#include "dbms/database_handler.hpp"
+#include "global.hpp"
+#include "query/config.hpp"
+#include "query/interpreter_context.hpp"
+#include "spdlog/spdlog.h"
+#include "storage/v2/durability/durability.hpp"
+#include "storage/v2/durability/paths.hpp"
+#include "storage/v2/isolation_level.hpp"
+#include "utils/exceptions.hpp"
+#include "utils/file.hpp"
+#include "utils/logging.hpp"
+#include "utils/result.hpp"
+#include "utils/rw_lock.hpp"
+#include "utils/synchronized.hpp"
+#include "utils/uuid.hpp"
+
+namespace memgraph::dbms {
+
+struct Statistics {
+  uint64_t num_vertex;           //!< Sum of vertexes in every database
+  uint64_t num_edges;            //!< Sum of edges in every database
+  uint64_t triggers;             //!< Sum of triggers in every database
+  uint64_t streams;              //!< Sum of streams in every database
+  uint64_t users;                //!< Number of defined users
+  uint64_t num_databases;        //!< Number of isolated databases
+  uint64_t indices;              //!< Sum of indices in every database
+  uint64_t constraints;          //!< Sum of constraints in every database
+  uint64_t storage_modes[3];     //!< Number of databases in each storage mode [IN_MEM_TX, IN_MEM_ANA, ON_DISK_TX]
+  uint64_t isolation_levels[3];  //!< Number of databases in each isolation level [SNAPSHOT, READ_COMM, READ_UNC]
+  uint64_t snapshot_enabled;     //!< Number of databases with snapshots enabled
+  uint64_t wal_enabled;          //!< Number of databases with WAL enabled
+};
+
+static inline nlohmann::json ToJson(const Statistics &stats) {
+  nlohmann::json res;
+
+  res["edges"] = stats.num_edges;
+  res["vertices"] = stats.num_vertex;
+  res["triggers"] = stats.triggers;
+  res["streams"] = stats.streams;
+  res["users"] = stats.users;
+  res["databases"] = stats.num_databases;
+  res["indices"] = stats.indices;
+  res["constraints"] = stats.constraints;
+  res["storage_modes"] = {{storage::StorageModeToString((storage::StorageMode)0), stats.storage_modes[0]},
+                          {storage::StorageModeToString((storage::StorageMode)1), stats.storage_modes[1]},
+                          {storage::StorageModeToString((storage::StorageMode)2), stats.storage_modes[2]}};
+  res["isolation_levels"] = {{storage::IsolationLevelToString((storage::IsolationLevel)0), stats.isolation_levels[0]},
+                             {storage::IsolationLevelToString((storage::IsolationLevel)1), stats.isolation_levels[1]},
+                             {storage::IsolationLevelToString((storage::IsolationLevel)2), stats.isolation_levels[2]}};
+  res["durability"] = {{"snapshot_enabled", stats.snapshot_enabled}, {"WAL_enabled", stats.wal_enabled}};
+
+  return res;
+}
+
+#ifdef MG_ENTERPRISE
+
+using DeleteResult = utils::BasicResult<DeleteError>;
+
+/**
+ * @brief Multi-database session contexts handler.
+ */
+class DbmsHandler {
+ public:
+  using LockT = utils::RWLock;
+  using NewResultT = utils::BasicResult<NewError, DatabaseAccess>;
+
+  /**
+   * @brief Initialize the handler.
+   *
+   * @param configs storage and interpreter configurations
+   * @param auth pointer to the global authenticator
+   * @param recovery_on_startup restore databases (and its content) and authentication data
+   * @param delete_on_drop when dropping delete any associated directories on disk
+   */
+  DbmsHandler(storage::Config config, auto *auth, bool recovery_on_startup, bool delete_on_drop)
+      : lock_{utils::RWLock::Priority::READ}, default_config_{std::move(config)}, delete_on_drop_(delete_on_drop) {
+    // TODO: Decouple storage config from dbms config
+    // TODO: Save individual db configs inside the kvstore and restore from there
+    storage::UpdatePaths(*default_config_, default_config_->durability.storage_directory / "databases");
+    const auto &db_dir = default_config_->durability.storage_directory;
+    const auto durability_dir = db_dir / ".durability";
+    utils::EnsureDirOrDie(db_dir);
+    utils::EnsureDirOrDie(durability_dir);
+    durability_ = std::make_unique<kvstore::KVStore>(durability_dir);
+
+    // Generate the default database
+    MG_ASSERT(!NewDefault_().HasError(), "Failed while creating the default DB.");
+
+    // Recover previous databases
+    if (recovery_on_startup) {
+      for (const auto &[name, _] : *durability_) {
+        if (name == kDefaultDB) continue;  // Already set
+        spdlog::info("Restoring database {}.", name);
+        MG_ASSERT(!New_(name).HasError(), "Failed while creating database {}.", name);
+        spdlog::info("Database {} restored.", name);
+      }
+    } else {  // Clear databases from the durability list and auth
+      auto locked_auth = auth->Lock();
+      for (const auto &[name, _] : *durability_) {
+        if (name == kDefaultDB) continue;
+        locked_auth->DeleteDatabase(name);
+        durability_->Delete(name);
+      }
+    }
+  }
+
+  /**
+   * @brief Create a new Database associated with the "name" database
+   *
+   * @param name name of the database
+   * @return NewResultT context on success, error on failure
+   */
+  NewResultT New(const std::string &name) {
+    std::lock_guard<LockT> wr(lock_);
+    return New_(name, name);
+  }
+
+  /**
+   * @brief Get the context associated with the "name" database
+   *
+   * @param name
+   * @return DatabaseAccess
+   * @throw UnknownDatabaseException if database not found
+   */
+  DatabaseAccess Get(std::string_view name) {
+    std::shared_lock<LockT> rd(lock_);
+    return Get_(name);
+  }
+
+  /**
+   * @brief Delete database.
+   *
+   * @param db_name database name
+   * @return DeleteResult error on failure
+   */
+  DeleteResult Delete(const std::string &db_name) {
+    std::lock_guard<LockT> wr(lock_);
+    if (db_name == kDefaultDB) {
+      // MSG cannot delete the default db
+      return DeleteError::DEFAULT_DB;
+    }
+
+    const auto storage_path = StorageDir_(db_name);
+    if (!storage_path) return DeleteError::NON_EXISTENT;
+
+    // Check if db exists
+    try {
+      // Low level handlers
+      if (!db_handler_.Delete(db_name)) {
+        return DeleteError::USING;
+      }
+    } catch (utils::BasicException &) {
+      return DeleteError::NON_EXISTENT;
+    }
+
+    // Remove from durability list
+    if (durability_) durability_->Delete(db_name);
+
+    // Delete disk storage
+    if (delete_on_drop_) {
+      std::error_code ec;
+      (void)std::filesystem::remove_all(*storage_path, ec);
+      if (ec) {
+        spdlog::error("Failed to clean disk while deleting database \"{}\".", db_name);
+        defunct_dbs_.emplace(db_name);
+        return DeleteError::DISK_FAIL;
+      }
+    }
+
+    // Delete from defunct_dbs_ (in case a second delete call was successful)
+    defunct_dbs_.erase(db_name);
+
+    return {};  // Success
+  }
+
+  /**
+   * @brief Return all active databases.
+   *
+   * @return std::vector<std::string>
+   */
+  std::vector<std::string> All() const {
+    std::shared_lock<LockT> rd(lock_);
+    return db_handler_.All();
+  }
+
+  /**
+   * @brief Return the statistics all databases.
+   *
+   * @return Statistics
+   */
+  Statistics Stats() {
+    Statistics stats{};
+    // TODO: Handle overflow?
+    std::shared_lock<LockT> rd(lock_);
+    for (auto &[_, db_gk] : db_handler_) {
+      auto db_acc_opt = db_gk.access();
+      if (!db_acc_opt) continue;
+      auto &db_acc = *db_acc_opt;
+      const auto &info = db_acc->GetInfo();
+      const auto &storage_info = info.storage_info;
+      stats.num_vertex += storage_info.vertex_count;
+      stats.num_edges += storage_info.edge_count;
+      stats.triggers += info.triggers;
+      stats.streams += info.streams;
+      ++stats.num_databases;
+      stats.indices += storage_info.label_indices + storage_info.label_property_indices;
+      stats.constraints += storage_info.existence_constraints + storage_info.unique_constraints;
+      ++stats.storage_modes[(int)storage_info.storage_mode];
+      ++stats.isolation_levels[(int)storage_info.isolation_level];
+      stats.snapshot_enabled += storage_info.durability_snapshot_enabled;
+      stats.wal_enabled += storage_info.durability_wal_enabled;
+    }
+    return stats;
+  }
+
+  /**
+   * @brief Return a vector with all database info.
+   *
+   * @return std::vector<DatabaseInfo>
+   */
+  std::vector<DatabaseInfo> Info() {
+    std::vector<DatabaseInfo> res;
+    res.reserve(std::distance(db_handler_.cbegin(), db_handler_.cend()));
+    std::shared_lock<LockT> rd(lock_);
+    for (auto &[_, db_gk] : db_handler_) {
+      auto db_acc_opt = db_gk.access();
+      if (!db_acc_opt) continue;
+      auto &db_acc = *db_acc_opt;
+      res.push_back(db_acc->GetInfo());
+    }
+    return res;
+  }
+
+  /**
+   * @brief Restore triggers for all currently defined databases.
+   * @note: Triggers can execute query procedures, so we need to reload the modules first and then the triggers
+   *
+   * @param ic global InterpreterContext
+   */
+  void RestoreTriggers(query::InterpreterContext *ic) {
+    std::lock_guard<LockT> wr(lock_);
+    for (auto &[_, db_gk] : db_handler_) {
+      auto db_acc_opt = db_gk.access();
+      if (!db_acc_opt) continue;
+      auto &db_acc = *db_acc_opt;
+      spdlog::debug("Restoring trigger for database \"{}\"", db_acc->id());
+      auto storage_accessor = db_acc->Access();
+      auto dba = memgraph::query::DbAccessor{storage_accessor.get()};
+      db_acc->trigger_store()->RestoreTriggers(&ic->ast_cache, &dba, ic->config.query, ic->auth_checker);
+    }
+  }
+
+  /**
+   * @brief Restore streams of all currently defined databases.
+   * @note: Stream transformations are using modules, they have to be restored after the query modules are loaded.
+   *
+   * @param ic global InterpreterContext
+   */
+  void RestoreStreams(query::InterpreterContext *ic) {
+    std::lock_guard<LockT> wr(lock_);
+    for (auto &[_, db_gk] : db_handler_) {
+      auto db_acc = db_gk.access();
+      if (!db_acc) continue;
+      auto *db = db_acc->get();
+      spdlog::debug("Restoring streams for database \"{}\"", db->id());
+      db->streams()->RestoreStreams(*db_acc, ic);
+    }
+  }
+
+ private:
+  /**
+   * @brief return the storage directory of the associated database
+   *
+   * @param name Database name
+   * @return std::optional<std::filesystem::path>
+   */
+  std::optional<std::filesystem::path> StorageDir_(const std::string &name) {
+    const auto conf = db_handler_.GetConfig(name);
+    if (conf) {
+      return conf->durability.storage_directory;
+    }
+    spdlog::debug("Failed to find storage dir for database \"{}\"", name);
+    return {};
+  }
+
+  /**
+   * @brief Create a new Database associated with the "name" database
+   *
+   * @param name name of the database
+   * @return NewResultT context on success, error on failure
+   */
+  NewResultT New_(const std::string &name) { return New_(name, name); }
+
+  /**
+   * @brief Create a new Database associated with the "name" database
+   *
+   * @param name name of the database
+   * @param storage_subdir undelying RocksDB directory
+   * @return NewResultT context on success, error on failure
+   */
+  NewResultT New_(const std::string &name, std::filesystem::path storage_subdir) {
+    if (default_config_) {
+      auto config_copy = *default_config_;
+      storage::UpdatePaths(config_copy, default_config_->durability.storage_directory / storage_subdir);
+      return New_(name, config_copy);
+    }
+    spdlog::info("Trying to generate session context without any configurations.");
+    return NewError::NO_CONFIGS;
+  }
+
+  /**
+   * @brief Create a new Database associated with the "name" database
+   *
+   * @param name name of the database
+   * @param storage_config storage configuration
+   * @return NewResultT context on success, error on failure
+   */
+  NewResultT New_(const std::string &name, storage::Config &storage_config) {
+    if (defunct_dbs_.contains(name)) {
+      spdlog::warn("Failed to generate database due to the unknown state of the previously defunct database \"{}\".",
+                   name);
+      return NewError::DEFUNCT;
+    }
+
+    auto new_db = db_handler_.New(name, storage_config);
+    if (new_db.HasValue()) {
+      // Success
+      if (durability_) durability_->Put(name, "ok");  // TODO: Serialize the configuration?
+      return new_db.GetValue();
+    }
+    return new_db.GetError();
+  }
+
+  /**
+   * @brief Create a new Database associated with the default database
+   *
+   * @return NewResultT context on success, error on failure
+   */
+  NewResultT NewDefault_() {
+    // Create the default DB in the root (this is how it was done pre multi-tenancy)
+    auto res = New_(kDefaultDB, "..");
+    if (res.HasValue()) {
+      // For back-compatibility...
+      // Recreate the dbms layout for the default db and symlink to the root
+      const auto dir = StorageDir_(kDefaultDB);
+      MG_ASSERT(dir, "Failed to find storage path.");
+      const auto main_dir = *dir / "databases" / kDefaultDB;
+
+      if (!std::filesystem::exists(main_dir)) {
+        std::filesystem::create_directory(main_dir);
+      }
+
+      // Force link on-disk directories
+      const auto conf = db_handler_.GetConfig(kDefaultDB);
+      MG_ASSERT(conf, "No configuration for the default database.");
+      const auto &tmp_conf = conf->disk;
+      std::vector<std::filesystem::path> to_link{
+          tmp_conf.main_storage_directory,         tmp_conf.label_index_directory,
+          tmp_conf.label_property_index_directory, tmp_conf.unique_constraints_directory,
+          tmp_conf.name_id_mapper_directory,       tmp_conf.id_name_mapper_directory,
+          tmp_conf.durability_directory,           tmp_conf.wal_directory,
+      };
+
+      // Add in-memory paths
+      // Some directories are redundant (skip those)
+      const std::vector<std::string> skip{".lock", "audit_log", "auth", "databases", "internal_modules", "settings"};
+      for (auto const &item : std::filesystem::directory_iterator{*dir}) {
+        const auto dir_name = std::filesystem::relative(item.path(), item.path().parent_path());
+        if (std::find(skip.begin(), skip.end(), dir_name) != skip.end()) continue;
+        to_link.push_back(item.path());
+      }
+
+      // Symlink to root dir
+      for (auto const &item : to_link) {
+        const auto dir_name = std::filesystem::relative(item, item.parent_path());
+        const auto link = main_dir / dir_name;
+        const auto to = std::filesystem::relative(item, main_dir);
+        if (!std::filesystem::is_symlink(link) && !std::filesystem::exists(link)) {
+          std::filesystem::create_directory_symlink(to, link);
+        } else {  // Check existing link
+          std::error_code ec;
+          const auto test_link = std::filesystem::read_symlink(link, ec);
+          if (ec || test_link != to) {
+            MG_ASSERT(false,
+                      "Memgraph storage directory incompatible with new version.\n"
+                      "Please use a clean directory or remove \"{}\" and try again.",
+                      link.string());
+          }
+        }
+      }
+    }
+    return res;
+  }
+
+  /**
+   * @brief Get the DatabaseAccess for the database associated with the "name"
+   *
+   * @param name
+   * @return DatabaseAccess
+   * @throw UnknownDatabaseException if trying to get unknown database
+   */
+  DatabaseAccess Get_(std::string_view name) {
+    auto db = db_handler_.Get(name);
+    if (db) {
+      return *db;
+    }
+    throw UnknownDatabaseException("Tried to retrieve an unknown database \"{}\".", name);
+  }
+
+  // Should storage objects ever be deleted?
+  mutable LockT lock_;                             //!< protective lock
+  DatabaseHandler db_handler_;                     //!< multi-tenancy storage handler
+  std::optional<storage::Config> default_config_;  //!< Storage configuration used when creating new databases
+  std::unique_ptr<kvstore::KVStore> durability_;   //!< list of active dbs (pointer so we can postpone its creation)
+  std::set<std::string> defunct_dbs_;              //!< Databases that are in an unknown state due to various failures
+  bool delete_on_drop_;                            //!< Flag defining if dropping storage also deletes its directory
+};
+#endif
+
+}  // namespace memgraph::dbms

src/dbms/global.hpp

@@ -48,6 +48,7 @@ enum class SetForResult : uint8_t {
 class UnknownSessionException : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
+  SPECIALIZE_GET_EXCEPTION_NAME(UnknownSessionException)
 };
 
 /**
@@ -58,53 +59,7 @@ class UnknownSessionException : public utils::BasicException {
 class UnknownDatabaseException : public utils::BasicException {
  public:
   using utils::BasicException::BasicException;
-};
-
-/**
- * @brief Session interface used by the DBMS to handle the the active sessions.
- * @todo Try to remove this dependency from SessionContextHandler. OnDelete could be removed, as it only does an assert.
- * OnChange could be removed if SetFor returned the pointer and the called then handled the OnChange execution.
- * However, the interface is very useful to  decouple the interpreter's query execution and the sessions themselves.
- */
-class SessionInterface {
- public:
-  SessionInterface() = default;
-  virtual ~SessionInterface() = default;
-
-  SessionInterface(const SessionInterface &) = default;
-  SessionInterface &operator=(const SessionInterface &) = default;
-  SessionInterface(SessionInterface &&) noexcept = default;
-  SessionInterface &operator=(SessionInterface &&) noexcept = default;
-
-  /**
-   * @brief Return the unique string identifying the session.
-   *
-   * @return std::string
-   */
-  virtual std::string UUID() const = 0;
-
-  /**
-   * @brief Return the currently active database.
-   *
-   * @return std::string
-   */
-  virtual std::string GetDatabaseName() const = 0;
-
-#ifdef MG_ENTERPRISE
-  /**
-   * @brief Gets called on database change.
-   *
-   * @return SetForResult enum (SUCCESS, ALREADY_SET or FAIL)
-   */
-  virtual dbms::SetForResult OnChange(const std::string &) = 0;
-
-  /**
-   * @brief Callback that gets called on database delete (drop).
-   *
-   * @return true on success
-   */
-  virtual bool OnDelete(const std::string &) = 0;
-#endif
+  SPECIALIZE_GET_EXCEPTION_NAME(UnknownDatabaseException)
 };
 
 }  // namespace memgraph::dbms

src/dbms/handler.hpp

@@ -18,21 +18,21 @@
 #include <unordered_map>
 
 #include "global.hpp"
+#include "utils/exceptions.hpp"
+#include "utils/gatekeeper.hpp"
 #include "utils/result.hpp"
-#include "utils/sync_ptr.hpp"
 
 namespace memgraph::dbms {
 
 /**
  * @brief Generic multi-database content handler.
  *
- * @tparam TContext
- * @tparam TConfig
+ * @tparam T
  */
-template <typename TContext, typename TConfig>
+template <typename T>
 class Handler {
  public:
-  using NewResult = utils::BasicResult<NewError, std::shared_ptr<TContext>>;
+  using NewResult = utils::BasicResult<NewError, typename utils::Gatekeeper<T>::Accessor>;
 
   /**
    * @brief Empty Handler constructor.
@@ -43,67 +43,65 @@ class Handler {
   /**
    * @brief Generate a new context and corresponding configuration.
    *
-   * @tparam T1 Variadic template of context constructor arguments
-   * @tparam T2 Variadic template of config constructor arguments
-   * @param name Name associated with the new context/config pair
-   * @param args1 Arguments passed (as a tuple) to the context constructor
-   * @param args2 Arguments passed (as a tuple) to the config constructor
+   * @tparam Args Variadic template of constructor arguments of T
+   * @param name Name associated with the new T
+   * @param args Arguments passed to the constructor of T
    * @return NewResult
    */
-  template <typename... T1, typename... T2>
-  NewResult New(std::string name, std::tuple<T1...> args1, std::tuple<T2...> args2) {
-    return New_(name, args1, args2, std::make_index_sequence<sizeof...(T1)>{},
-                std::make_index_sequence<sizeof...(T2)>{});
+  template <typename... Args>
+  NewResult New(std::piecewise_construct_t /* marker */, std::string_view name, Args... args) {
+    // Make sure the emplace will succeed, since we don't want to create temporary objects that could break something
+    if (!Has(name)) {
+      auto [itr, _] = items_.emplace(std::piecewise_construct, std::forward_as_tuple(name),
+                                     std::forward_as_tuple(std::forward<Args>(args)...));
+      auto db_acc = itr->second.access();
+      if (db_acc) return std::move(*db_acc);
+      return NewError::DEFUNCT;
+    }
+    spdlog::info("Item with name \"{}\" already exists.", name);
+    return NewError::EXISTS;
   }
 
   /**
    * @brief Get pointer to context.
    *
    * @param name Name associated with the wanted context
-   * @return std::optional<std::shared_ptr<TContext>>
+   * @return std::optional<typename utils::Gatekeeper<T>::Accessor>
    */
-  std::optional<std::shared_ptr<TContext>> Get(const std::string &name) {
+  std::optional<typename utils::Gatekeeper<T>::Accessor> Get(std::string_view name) {
     if (auto search = items_.find(name); search != items_.end()) {
-      return search->second.get();
+      return search->second.access();
     }
-    return {};
+    return std::nullopt;
   }
 
   /**
-   * @brief Get the config.
+   * @brief Delete the context associated with the name.
    *
-   * @param name Name associated with the wanted config
-   * @return std::optional<TConfig>
-   */
-  std::optional<TConfig> GetConfig(const std::string &name) const {
-    if (auto search = items_.find(name); search != items_.end()) {
-      return search->second.config();
-    }
-    return {};
-  }
-
-  /**
-   * @brief Delete the context/config pair associated with the name.
-   *
-   * @param name Name associated with the context/config pair to delete
+   * @param name Name associated with the context to delete
    * @return true on success
+   * @throw BasicException
    */
   bool Delete(const std::string &name) {
     if (auto itr = items_.find(name); itr != items_.end()) {
-      itr->second.DestroyAndSync();
-      items_.erase(itr);
-      return true;
+      auto db_acc = itr->second.access();
+      if (db_acc && db_acc->try_delete()) {
+        db_acc->reset();
+        items_.erase(itr);
+        return true;
+      }
+      return false;
     }
-    return false;
+    throw utils::BasicException("Unknown item \"{}\".", name);
   }
 
   /**
    * @brief Check if a name is already used.
    *
    * @param name Name to check
-   * @return true if a context/config pair is already associated with the name
+   * @return true if a T is already associated with the name
    */
-  bool Has(const std::string &name) const { return items_.find(name) != items_.end(); }
+  bool Has(std::string_view name) const { return items_.find(name) != items_.end(); }
 
   auto begin() { return items_.begin(); }
   auto end() { return items_.end(); }
@@ -112,31 +110,16 @@ class Handler {
   auto cbegin() const { return items_.cbegin(); }
   auto cend() const { return items_.cend(); }
 
- private:
-  /**
-   * @brief Lower level handler that hides some ugly code.
-   *
-   * @tparam T1 Variadic template of context constructor arguments
-   * @tparam T2 Variadic template of config constructor arguments
-   * @tparam I1 List of indexes associated with the first tuple
-   * @tparam I2 List of indexes associated with the second tuple
-   */
-  template <typename... T1, typename... T2, std::size_t... I1, std::size_t... I2>
-  NewResult New_(std::string name, std::tuple<T1...> &args1, std::tuple<T2...> &args2,
-                 std::integer_sequence<std::size_t, I1...> /*not-used*/,
-                 std::integer_sequence<std::size_t, I2...> /*not-used*/) {
-    // Make sure the emplace will succeed, since we don't want to create temporary objects that could break something
-    if (!Has(name)) {
-      auto [itr, _] = items_.emplace(std::piecewise_construct, std::forward_as_tuple(name),
-                                     std::forward_as_tuple(TConfig{std::forward<T1>(std::get<I1>(args1))...},
-                                                           std::forward<T2>(std::get<I2>(args2))...));
-      return itr->second.get();
-    }
-    spdlog::info("Item with name \"{}\" already exists.", name);
-    return NewError::EXISTS;
-  }
+  struct string_hash {
+    using is_transparent = void;
+    [[nodiscard]] size_t operator()(const char *s) const { return std::hash<std::string_view>{}(s); }
+    [[nodiscard]] size_t operator()(std::string_view s) const { return std::hash<std::string_view>{}(s); }
+    [[nodiscard]] size_t operator()(const std::string &s) const { return std::hash<std::string>{}(s); }
+  };
 
-  std::unordered_map<std::string, utils::SyncPtr<TContext, TConfig>> items_;  //!< map to all active items
+ private:
+  std::unordered_map<std::string, utils::Gatekeeper<T>, string_hash, std::equal_to<>>
+      items_;  //!< map to all active items
 };
 
 }  // namespace memgraph::dbms

src/dbms/interp_handler.hpp

@@ -1,106 +0,0 @@
-// Copyright 2023 Memgraph Ltd.
-//
-// Use of this software is governed by the Business Source License
-// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
-// License, and you may not use this file except in compliance with the Business Source License.
-//
-// As of the Change Date specified in that file, in accordance with
-// the Business Source License, use of this software will be governed
-// by the Apache License, Version 2.0, included in the file
-// licenses/APL.txt.
-
-#pragma once
-
-#ifdef MG_ENTERPRISE
-
-#include "global.hpp"
-#include "query/auth_checker.hpp"
-#include "query/config.hpp"
-#include "query/interpreter.hpp"
-#include "storage/v2/storage.hpp"
-
-#include "handler.hpp"
-
-namespace memgraph::dbms {
-
-/**
- * @brief Simple class that adds useful information to the query's InterpreterContext
- *
- * @tparam T Multi-database handler type
- */
-template <typename T>
-class ExpandedInterpContext : public query::InterpreterContext {
- public:
-  template <typename... TArgs>
-  explicit ExpandedInterpContext(T &ref, TArgs &&...args)
-      : query::InterpreterContext(std::forward<TArgs>(args)...), sc_handler_(ref) {}
-
-  T &sc_handler_;  //!< Multi-database/SessionContext handler (used in some queries)
-};
-
-/**
- * @brief Simple structure that expands on the query's InterpreterConfig
- *
- */
-struct ExpandedInterpConfig {
-  storage::Config storage_config;          //!< Storage configuration
-  query::InterpreterConfig interp_config;  //!< Interpreter configuration
-};
-
-/**
- * @brief Multi-database interpreter context handler
- *
- * @tparam TSCHandler High-level multi-database/SessionContext handler type
- */
-template <typename TSCHandler>
-class InterpContextHandler : public Handler<ExpandedInterpContext<TSCHandler>, ExpandedInterpConfig> {
- public:
-  using InterpContextT = ExpandedInterpContext<TSCHandler>;
-  using HandlerT = Handler<InterpContextT, ExpandedInterpConfig>;
-
-  /**
-   * @brief Generate a new interpreter context associated with the passed name.
-   *
-   * @param name Name associating the new interpreter context
-   * @param sc_handler Multi-database/SessionContext handler used (some queries might use it)
-   * @param db Storage associated with the interpreter context
-   * @param config Interpreter's configuration
-   * @param dir Directory used by the interpreter
-   * @param auth_handler AuthQueryHandler used
-   * @param auth_checker AuthChecker used
-   * @return HandlerT::NewResult
-   */
-  typename HandlerT::NewResult New(const std::string &name, TSCHandler &sc_handler, storage::Config storage_config,
-                                   const query::InterpreterConfig &interpreter_config,
-                                   query::AuthQueryHandler &auth_handler, query::AuthChecker &auth_checker) {
-    // Check if compatible with the existing interpreters
-    if (std::any_of(HandlerT::cbegin(), HandlerT::cend(), [&](const auto &elem) {
-          const auto &config = elem.second.config().storage_config;
-          return config.durability.storage_directory == storage_config.durability.storage_directory;
-        })) {
-      spdlog::info("Tried to generate a new context using claimed directory and/or storage.");
-      return NewError::EXISTS;
-    }
-    const auto dir = storage_config.durability.storage_directory;
-    storage_config.name = name;  // Set storage id via config
-    return HandlerT::New(
-        name, std::forward_as_tuple(storage_config, interpreter_config),
-        std::forward_as_tuple(sc_handler, storage_config, interpreter_config, dir, &auth_handler, &auth_checker));
-  }
-
-  /**
-   * @brief All currently active storage.
-   *
-   * @return std::vector<std::string>
-   */
-  std::vector<std::string> All() const {
-    std::vector<std::string> res;
-    res.reserve(std::distance(HandlerT::cbegin(), HandlerT::cend()));
-    std::for_each(HandlerT::cbegin(), HandlerT::cend(), [&](const auto &elem) { res.push_back(elem.first); });
-    return res;
-  }
-};
-
-}  // namespace memgraph::dbms
-
-#endif

src/dbms/session_context.hpp

@@ -1,61 +0,0 @@
-// Copyright 2023 Memgraph Ltd.
-//
-// Use of this software is governed by the Business Source License
-// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
-// License, and you may not use this file except in compliance with the Business Source License.
-//
-// As of the Change Date specified in that file, in accordance with
-// the Business Source License, use of this software will be governed
-// by the Apache License, Version 2.0, included in the file
-// licenses/APL.txt.
-
-#pragma once
-
-#include "auth/auth.hpp"
-#include "query/interpreter.hpp"
-#include "storage/v2/storage.hpp"
-#include "utils/synchronized.hpp"
-
-#if MG_ENTERPRISE
-#include "audit/log.hpp"
-#endif
-namespace memgraph::dbms {
-
-/**
- * @brief Structure encapsulating storage and interpreter context.
- *
- * @note Each session contains a copy.
- */
-struct SessionContext {
-  // Explicit constructor here to ensure that pointers to all objects are
-  // supplied.
-
-  SessionContext(std::shared_ptr<memgraph::query::InterpreterContext> interpreter_context, std::string run,
-                 memgraph::utils::Synchronized<memgraph::auth::Auth, memgraph::utils::WritePrioritizedRWLock> *auth
-#ifdef MG_ENTERPRISE
-                 ,
-                 memgraph::audit::Log *audit_log
-#endif
-                 )
-      : interpreter_context(interpreter_context),
-        run_id(run),
-        auth(auth)
-#ifdef MG_ENTERPRISE
-        ,
-        audit_log(audit_log)
-#endif
-  {
-  }
-
-  std::shared_ptr<memgraph::query::InterpreterContext> interpreter_context;
-  std::string run_id;
-
-  // std::shared_ptr<AuthContext> auth_context;
-  memgraph::utils::Synchronized<memgraph::auth::Auth, memgraph::utils::WritePrioritizedRWLock> *auth;
-
-#ifdef MG_ENTERPRISE
-  memgraph::audit::Log *audit_log;
-#endif
-};
-
-}  // namespace memgraph::dbms

src/dbms/session_context_handler.hpp

@@ -1,603 +0,0 @@
-// Copyright 2023 Memgraph Ltd.
-//
-// Use of this software is governed by the Business Source License
-// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
-// License, and you may not use this file except in compliance with the Business Source License.
-//
-// As of the Change Date specified in that file, in accordance with
-// the Business Source License, use of this software will be governed
-// by the Apache License, Version 2.0, included in the file
-// licenses/APL.txt.
-
-#pragma once
-
-#include <algorithm>
-#include <concepts>
-#include <cstdint>
-#include <filesystem>
-#include <memory>
-#include <mutex>
-#include <optional>
-#include <ostream>
-#include <stdexcept>
-#include <system_error>
-#include <unordered_map>
-
-#include "constants.hpp"
-#include "global.hpp"
-#include "interp_handler.hpp"
-#include "query/auth_checker.hpp"
-#include "query/config.hpp"
-#include "query/interpreter.hpp"
-#include "session_context.hpp"
-#include "spdlog/spdlog.h"
-#include "storage/v2/durability/durability.hpp"
-#include "storage/v2/durability/paths.hpp"
-#include "utils/exceptions.hpp"
-#include "utils/file.hpp"
-#include "utils/logging.hpp"
-#include "utils/result.hpp"
-#include "utils/rw_lock.hpp"
-#include "utils/synchronized.hpp"
-#include "utils/uuid.hpp"
-
-#include "handler.hpp"
-
-namespace memgraph::dbms {
-
-#ifdef MG_ENTERPRISE
-
-using DeleteResult = utils::BasicResult<DeleteError>;
-
-/**
- * @brief Multi-database session contexts handler.
- */
-class SessionContextHandler {
- public:
-  using StorageT = storage::Storage;
-  using StorageConfigT = storage::Config;
-  using LockT = utils::RWLock;
-  using NewResultT = utils::BasicResult<NewError, SessionContext>;
-
-  struct Config {
-    StorageConfigT storage_config;           //!< Storage configuration
-    query::InterpreterConfig interp_config;  //!< Interpreter context configuration
-    std::function<void(utils::Synchronized<auth::Auth, utils::WritePrioritizedRWLock> *,
-                       std::unique_ptr<query::AuthQueryHandler> &, std::unique_ptr<query::AuthChecker> &)>
-        glue_auth;
-  };
-
-  struct Statistics {
-    uint64_t num_vertex;     //!< Sum of vertexes in every database
-    uint64_t num_edges;      //!< Sum of edges in every database
-    uint64_t num_databases;  //! number of isolated databases
-  };
-
-  /**
-   * @brief Initialize the handler.
-   *
-   * @param audit_log pointer to the audit logger (ENTERPRISE only)
-   * @param configs storage and interpreter configurations
-   * @param recovery_on_startup restore databases (and its content) and authentication data
-   */
-  SessionContextHandler(memgraph::audit::Log &audit_log, Config configs, bool recovery_on_startup, bool delete_on_drop)
-      : lock_{utils::RWLock::Priority::READ},
-        default_configs_(configs),
-        run_id_{utils::GenerateUUID()},
-        audit_log_(&audit_log),
-        delete_on_drop_(delete_on_drop) {
-    const auto &root = configs.storage_config.durability.storage_directory;
-    utils::EnsureDirOrDie(root);
-    // Verify that the user that started the process is the same user that is
-    // the owner of the storage directory.
-    storage::durability::VerifyStorageDirectoryOwnerAndProcessUserOrDie(root);
-
-    // Create the lock file and open a handle to it. This will crash the
-    // database if it can't open the file for writing or if any other process is
-    // holding the file opened.
-    lock_file_path_ = root / ".lock";
-    lock_file_handle_.Open(lock_file_path_, utils::OutputFile::Mode::OVERWRITE_EXISTING);
-    MG_ASSERT(lock_file_handle_.AcquireLock(),
-              "Couldn't acquire lock on the storage directory {}"
-              "!\nAnother Memgraph process is currently running with the same "
-              "storage directory, please stop it first before starting this "
-              "process!",
-              root);
-
-    // TODO: Figure out if this is needed/wanted
-    // Clear auth database since we are not recovering
-    // if (!recovery_on_startup) {
-    //   const auto &auth_dir = root / "auth";
-    //   // Backup if auth present
-    //   if (utils::DirExists(auth_dir)) {
-    //     auto backup_dir = root / storage::durability::kBackupDirectory;
-    //     std::error_code error_code;
-    //     utils::EnsureDirOrDie(backup_dir);
-    //     std::error_code ec;
-    //     const auto now = std::chrono::system_clock::now();
-    //     std::ostringstream os;
-    //     os << now.time_since_epoch().count();
-    //     std::filesystem::rename(auth_dir, backup_dir / ("auth-" + os.str()), ec);
-    //     MG_ASSERT(!ec, "Couldn't backup auth directory because of: {}", ec.message());
-    //     spdlog::warn(
-    //         "Since Memgraph was not supposed to recover on startup the authentication files will be "
-    //         "overwritten. To prevent important data loss, Memgraph has stored those files into .backup directory "
-    //         "inside the storage directory.");
-    //   }
-
-    //   // Clear
-    //   if (std::filesystem::exists(auth_dir)) {
-    //     std::filesystem::remove_all(auth_dir);
-    //   }
-    // }
-
-    // Lazy initialization of auth_
-    auth_ = std::make_unique<utils::Synchronized<auth::Auth, utils::WritePrioritizedRWLock>>(root / "auth");
-    configs.glue_auth(auth_.get(), auth_handler_, auth_checker_);
-
-    // TODO: Decouple storage config from dbms config
-    // TODO: Save individual db configs inside the kvstore and restore from there
-    storage::UpdatePaths(default_configs_->storage_config,
-                         default_configs_->storage_config.durability.storage_directory / "databases");
-    const auto &db_dir = default_configs_->storage_config.durability.storage_directory;
-    const auto durability_dir = db_dir / ".durability";
-    utils::EnsureDirOrDie(db_dir);
-    utils::EnsureDirOrDie(durability_dir);
-    durability_ = std::make_unique<kvstore::KVStore>(durability_dir);
-
-    // Generate the default database
-    MG_ASSERT(!NewDefault_().HasError(), "Failed while creating the default DB.");
-
-    // Recover previous databases
-    if (recovery_on_startup) {
-      for (const auto &[name, _] : *durability_) {
-        if (name == kDefaultDB) continue;  // Already set
-        spdlog::info("Restoring database {}.", name);
-        MG_ASSERT(!New_(name).HasError(), "Failed while creating database {}.", name);
-        spdlog::info("Database {} restored.", name);
-      }
-    } else {  // Clear databases from the durability list and auth
-      auto locked_auth = auth_->Lock();
-      for (const auto &[name, _] : *durability_) {
-        if (name == kDefaultDB) continue;
-        locked_auth->DeleteDatabase(name);
-        durability_->Delete(name);
-      }
-    }
-  }
-
-  void Shutdown() {
-    for (auto &ic : interp_handler_) memgraph::query::Shutdown(ic.second.get().get());
-  }
-
-  /**
-   * @brief Create a new SessionContext associated with the "name" database
-   *
-   * @param name name of the database
-   * @return NewResultT context on success, error on failure
-   */
-  NewResultT New(const std::string &name) {
-    std::lock_guard<LockT> wr(lock_);
-    return New_(name, name);
-  }
-
-  /**
-   * @brief Get the context associated with the "name" database
-   *
-   * @param name
-   * @return SessionContext
-   * @throw UnknownDatabaseException if getting unknown database
-   */
-  SessionContext Get(const std::string &name) {
-    std::shared_lock<LockT> rd(lock_);
-    return Get_(name);
-  }
-
-  /**
-   * @brief Set the undelying database for a particular session.
-   *
-   * @param uuid unique session identifier
-   * @param db_name unique database name
-   * @return SetForResult enum
-   * @throws UnknownDatabaseException, UnknownSessionException or anything OnChange throws
-   */
-  SetForResult SetFor(const std::string &uuid, const std::string &db_name) {
-    std::shared_lock<LockT> rd(lock_);
-    (void)Get_(
-        db_name);  // throws if db doesn't exist (TODO: Better to pass it via OnChange - but injecting dependency)
-    try {
-      auto &s = sessions_.at(uuid);
-      return s.OnChange(db_name);
-    } catch (std::out_of_range &) {
-      throw UnknownSessionException("Unknown session \"{}\"", uuid);
-    }
-  }
-
-  /**
-   * @brief Set the undelying database from a session itself. SessionContext handler.
-   *
-   * @param db_name unique database name
-   * @param handler function that gets called in place with the appropriate SessionContext
-   * @return SetForResult enum
-   */
-  template <typename THandler>
-  requires std::invocable<THandler, SessionContext> SetForResult SetInPlace(const std::string &db_name,
-                                                                            THandler handler) {
-    std::shared_lock<LockT> rd(lock_);
-    return handler(Get_(db_name));
-  }
-
-  /**
-   * @brief Call void handler under a shared lock.
-   *
-   * @param handler function that gets called in place
-   */
-  template <typename THandler>
-  requires std::invocable<THandler>
-  void CallInPlace(THandler handler) {
-    std::shared_lock<LockT> rd(lock_);
-    handler();
-  }
-
-  /**
-   * @brief Register an active session (used to handle callbacks).
-   *
-   * @param session
-   * @return true on success
-   */
-  bool Register(SessionInterface &session) {
-    std::lock_guard<LockT> wr(lock_);
-    auto [_, success] = sessions_.emplace(session.UUID(), session);
-    return success;
-  }
-
-  /**
-   * @brief Delete a session.
-   *
-   * @param session
-   */
-  bool Delete(const SessionInterface &session) {
-    std::lock_guard<LockT> wr(lock_);
-    return sessions_.erase(session.UUID()) > 0;
-  }
-
-  /**
-   * @brief Delete database.
-   *
-   * @param db_name database name
-   * @return DeleteResult error on failure
-   */
-  DeleteResult Delete(const std::string &db_name) {
-    std::lock_guard<LockT> wr(lock_);
-    if (db_name == kDefaultDB) {
-      // MSG cannot delete the default db
-      return DeleteError::DEFAULT_DB;
-    }
-    // Check if db exists
-    try {
-      auto sc = Get_(db_name);
-      // Check if a session is using the db
-      if (!sc.interpreter_context->interpreters->empty()) {
-        return DeleteError::USING;
-      }
-    } catch (UnknownDatabaseException &) {
-      return DeleteError::NON_EXISTENT;
-    }
-
-    // High level handlers
-    for (auto &[_, s] : sessions_) {
-      if (!s.OnDelete(db_name)) {
-        spdlog::error("Partial failure while deleting database \"{}\".", db_name);
-        defunct_dbs_.emplace(db_name);
-        return DeleteError::FAIL;
-      }
-    }
-
-    // Low level handlers
-    const auto storage_path = StorageDir_(db_name);
-    MG_ASSERT(storage_path, "Missing storage for {}", db_name);
-    if (!interp_handler_.Delete(db_name)) {
-      spdlog::error("Partial failure while deleting database \"{}\".", db_name);
-      defunct_dbs_.emplace(db_name);
-      return DeleteError::FAIL;
-    }
-
-    // Remove from auth
-    auth_->Lock()->DeleteDatabase(db_name);
-    // Remove from durability list
-    if (durability_) durability_->Delete(db_name);
-
-    // Delete disk storage
-    if (delete_on_drop_) {
-      std::error_code ec;
-      (void)std::filesystem::remove_all(*storage_path, ec);
-      if (ec) {
-        spdlog::error("Failed to clean disk while deleting database \"{}\".", db_name);
-        defunct_dbs_.emplace(db_name);
-        return DeleteError::DISK_FAIL;
-      }
-    }
-
-    // Delete from defunct_dbs_ (in case a second delete call was successful)
-    defunct_dbs_.erase(db_name);
-
-    return {};  // Success
-  }
-
-  /**
-   * @brief Set the default configurations.
-   *
-   * @param configs storage, interpreter and authorization configurations
-   */
-  void SetDefaultConfigs(Config configs) {
-    std::lock_guard<LockT> wr(lock_);
-    default_configs_ = configs;
-  }
-
-  /**
-   * @brief Get the default configurations.
-   *
-   * @return std::optional<Config>
-   */
-  std::optional<Config> GetDefaultConfigs() const {
-    std::shared_lock<LockT> rd(lock_);
-    return default_configs_;
-  }
-
-  /**
-   * @brief Return all active databases.
-   *
-   * @return std::vector<std::string>
-   */
-  std::vector<std::string> All() const {
-    std::shared_lock<LockT> rd(lock_);
-    return interp_handler_.All();
-  }
-
-  /**
-   * @brief Return the number of vertex across all databases.
-   *
-   * @return uint64_t
-   */
-  Statistics Info() const {
-    // TODO: Handle overflow
-    uint64_t nv = 0;
-    uint64_t ne = 0;
-    std::shared_lock<LockT> rd(lock_);
-    const uint64_t ndb = std::distance(interp_handler_.cbegin(), interp_handler_.cend());
-    for (const auto &ic : interp_handler_) {
-      const auto &info = ic.second.get()->db->GetInfo();
-      nv += info.vertex_count;
-      ne += info.edge_count;
-    }
-    return {nv, ne, ndb};
-  }
-
-  /**
-   * @brief Return the currently active database for a particular session.
-   *
-   * @param uuid session's unique identifier
-   * @return std::string name of the database
-   * @throw
-   */
-  std::string Current(const std::string &uuid) const {
-    std::shared_lock<LockT> rd(lock_);
-    return sessions_.at(uuid).GetDatabaseName();
-  }
-
-  /**
-   * @brief Restore triggers for all currently defined databases.
-   * @note: Triggers can execute query procedures, so we need to reload the modules first and then the triggers
-   */
-  void RestoreTriggers() {
-    std::lock_guard<LockT> wr(lock_);
-    for (auto &ic_itr : interp_handler_) {
-      auto ic = ic_itr.second.get();
-      spdlog::debug("Restoring trigger for database \"{}\"", ic->db->id());
-      auto storage_accessor = ic->db->Access();
-      auto dba = memgraph::query::DbAccessor{storage_accessor.get()};
-      ic->trigger_store.RestoreTriggers(&ic->ast_cache, &dba, ic->config.query, ic->auth_checker);
-    }
-  }
-
-  /**
-   * @brief Restore streams of all currently defined databases.
-   * @note: Stream transformations are using modules, they have to be restored after the query modules are loaded.
-   */
-  void RestoreStreams() {
-    std::lock_guard<LockT> wr(lock_);
-    for (auto &ic_itr : interp_handler_) {
-      auto ic = ic_itr.second.get();
-      spdlog::debug("Restoring streams for database \"{}\"", ic->db->id());
-      ic->streams.RestoreStreams();
-    }
-  }
-
- private:
-  std::optional<std::filesystem::path> StorageDir_(const std::string &name) const {
-    const auto conf = interp_handler_.GetConfig(name);
-    if (conf) {
-      return conf->storage_config.durability.storage_directory;
-    }
-    spdlog::debug("Failed to find storage dir for database \"{}\"", name);
-    return {};
-  }
-
-  /**
-   * @brief Create a new SessionContext associated with the "name" database
-   *
-   * @param name name of the database
-   * @return NewResultT context on success, error on failure
-   */
-  NewResultT New_(const std::string &name) { return New_(name, name); }
-
-  /**
-   * @brief Create a new SessionContext associated with the "name" database
-   *
-   * @param name name of the database
-   * @param storage_subdir undelying RocksDB directory
-   * @return NewResultT context on success, error on failure
-   */
-  NewResultT New_(const std::string &name, std::filesystem::path storage_subdir) {
-    if (default_configs_) {
-      auto storage = default_configs_->storage_config;
-      storage::UpdatePaths(storage, storage.durability.storage_directory / storage_subdir);
-      return New_(name, storage, default_configs_->interp_config);
-    }
-    spdlog::info("Trying to generate session context without any configurations.");
-    return NewError::NO_CONFIGS;
-  }
-
-  /**
-   * @brief Create a new SessionContext associated with the "name" database
-   *
-   * @param name name of the database
-   * @param storage_config storage configuration
-   * @param inter_config interpreter configuration
-   * @return NewResultT context on success, error on failure
-   */
-  NewResultT New_(const std::string &name, StorageConfigT &storage_config, query::InterpreterConfig &inter_config/*,
-                  const std::string &ah_flags*/) {
-    MG_ASSERT(auth_handler_, "No high level AuthQueryHandler has been supplied.");
-    MG_ASSERT(auth_checker_, "No high level AuthChecker has been supplied.");
-
-    if (defunct_dbs_.contains(name)) {
-      spdlog::warn("Failed to generate database due to the unknown state of the previously defunct database \"{}\".",
-                   name);
-      return NewError::DEFUNCT;
-    }
-
-    auto new_interp = interp_handler_.New(name, *this, storage_config, inter_config, *auth_handler_, *auth_checker_);
-
-    if (new_interp.HasValue()) {
-      // Success
-      if (durability_) durability_->Put(name, "ok");
-      return SessionContext{new_interp.GetValue(), run_id_, auth_.get(), audit_log_};
-    }
-    return new_interp.GetError();
-  }
-
-  /**
-   * @brief Create a new SessionContext associated with the default database
-   *
-   * @return NewResultT context on success, error on failure
-   */
-  NewResultT NewDefault_() {
-    // Create the default DB in the root (this is how it was done pre multi-tenancy)
-    auto res = New_(kDefaultDB, "..");
-    if (res.HasValue()) {
-      // For back-compatibility...
-      // Recreate the dbms layout for the default db and symlink to the root
-      const auto dir = StorageDir_(kDefaultDB);
-      MG_ASSERT(dir, "Failed to find storage path.");
-      const auto main_dir = *dir / "databases" / kDefaultDB;
-
-      if (!std::filesystem::exists(main_dir)) {
-        std::filesystem::create_directory(main_dir);
-      }
-
-      // Force link on-disk directories
-      const auto conf = interp_handler_.GetConfig(kDefaultDB);
-      MG_ASSERT(conf, "No configuration for the default database.");
-      const auto &tmp_conf = conf->storage_config.disk;
-      std::vector<std::filesystem::path> to_link{
-          tmp_conf.main_storage_directory,         tmp_conf.label_index_directory,
-          tmp_conf.label_property_index_directory, tmp_conf.unique_constraints_directory,
-          tmp_conf.name_id_mapper_directory,       tmp_conf.id_name_mapper_directory,
-          tmp_conf.durability_directory,           tmp_conf.wal_directory,
-      };
-
-      // Add in-memory paths
-      // Some directories are redundant (skip those)
-      const std::vector<std::string> skip{".lock", "audit_log", "auth", "databases", "internal_modules", "settings"};
-      for (auto const &item : std::filesystem::directory_iterator{*dir}) {
-        const auto dir_name = std::filesystem::relative(item.path(), item.path().parent_path());
-        if (std::find(skip.begin(), skip.end(), dir_name) != skip.end()) continue;
-        to_link.push_back(item.path());
-      }
-
-      // Symlink to root dir
-      for (auto const &item : to_link) {
-        const auto dir_name = std::filesystem::relative(item, item.parent_path());
-        const auto link = main_dir / dir_name;
-        const auto to = std::filesystem::relative(item, main_dir);
-        if (!std::filesystem::is_symlink(link) && !std::filesystem::exists(link)) {
-          std::filesystem::create_directory_symlink(to, link);
-        } else {  // Check existing link
-          std::error_code ec;
-          const auto test_link = std::filesystem::read_symlink(link, ec);
-          if (ec || test_link != to) {
-            MG_ASSERT(false,
-                      "Memgraph storage directory incompatible with new version.\n"
-                      "Please use a clean directory or remove \"{}\" and try again.",
-                      link.string());
-          }
-        }
-      }
-    }
-    return res;
-  }
-
-  /**
-   * @brief Get the context associated with the "name" database
-   *
-   * @param name
-   * @return SessionContext
-   * @throw UnknownDatabaseException if trying to get unknown database
-   */
-  SessionContext Get_(const std::string &name) {
-    auto interp = interp_handler_.Get(name);
-    if (interp) {
-      return SessionContext{*interp, run_id_, auth_.get(), audit_log_};
-    }
-    throw UnknownDatabaseException("Tried to retrieve an unknown database \"{}\".", name);
-  }
-
-  // Should storage objects ever be deleted?
-  mutable LockT lock_;                                          //!< protective lock
-  std::filesystem::path lock_file_path_;                        //!< Lock file protecting the main storage
-  utils::OutputFile lock_file_handle_;                          //!< Handler the lock (crash if already open)
-  InterpContextHandler<SessionContextHandler> interp_handler_;  //!< multi-tenancy interpreter handler
-  // AuthContextHandler auth_handler_; //!< multi-tenancy authorization handler (currently we use a single global
-  // auth)
-  std::unique_ptr<utils::Synchronized<auth::Auth, utils::WritePrioritizedRWLock>> auth_;
-  std::unique_ptr<query::AuthQueryHandler> auth_handler_;
-  std::unique_ptr<query::AuthChecker> auth_checker_;
-  std::optional<Config> default_configs_;                         //!< default storage and interpreter configurations
-  const std::string run_id_;                                      //!< run's unique identifier (auto generated)
-  memgraph::audit::Log *audit_log_;                               //!< pointer to the audit logger
-  std::unordered_map<std::string, SessionInterface &> sessions_;  //!< map of active/registered sessions
-  std::unique_ptr<kvstore::KVStore> durability_;  //!< list of active dbs (pointer so we can postpone its creation)
-
-  std::set<std::string> defunct_dbs_;  //!< Databases that are in an unknown state due to various failures
-  bool delete_on_drop_;                //!< Flag defining if dropping storage also deletes its directory
- public:
-  static SessionContextHandler &ExtractSCH(query::InterpreterContext *interpreter_context) {
-    return static_cast<typename decltype(interp_handler_)::InterpContextT *>(interpreter_context)->sc_handler_;
-  }
-};
-
-#else
-/**
- * @brief Initialize the handler.
- *
- * @param auth pointer to the authenticator
- * @param configs storage and interpreter configurations
- */
-static inline SessionContext Init(storage::Config &storage_config, query::InterpreterConfig &interp_config,
-                                  utils::Synchronized<auth::Auth, utils::WritePrioritizedRWLock> *auth,
-                                  query::AuthQueryHandler *auth_handler, query::AuthChecker *auth_checker) {
-  MG_ASSERT(auth, "Passed a nullptr auth");
-  MG_ASSERT(auth_handler, "Passed a nullptr auth_handler");
-  MG_ASSERT(auth_checker, "Passed a nullptr auth_checker");
-
-  storage_config.name = kDefaultDB;
-  auto interp_context = std::make_shared<query::InterpreterContext>(
-      storage_config, interp_config, storage_config.durability.storage_directory, auth_handler, auth_checker);
-  MG_ASSERT(interp_context, "Failed to construct main interpret context.");
-
-  return SessionContext{interp_context, utils::GenerateUUID(), auth};
-}
-#endif
-
-}  // namespace memgraph::dbms

src/distributed/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_library(mg-distributed)
+add_library(mg::distributed ALIAS mg-distributed)
+target_include_directories(mg-distributed PUBLIC include )
+target_sources(mg-distributed PRIVATE lamport_clock.cpp)

src/distributed/include/distributed/lamport_clock.hpp

@@ -0,0 +1,61 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+#pragma once
+
+#include <atomic>
+#include <compare>
+#include <cstdint>
+#include <numeric>
+
+namespace memgraph::distributed {
+
+// forward declare, for strong timestamps
+template <typename Tag>
+struct LamportClock;
+
+template <typename Tag>
+struct timestamp {
+  friend std::strong_ordering operator<=>(timestamp const &, timestamp const &) = default;
+
+ private:
+  friend struct LamportClock<Tag>;
+
+  explicit timestamp(uint64_t value) : value_{value} {}
+  uint64_t value_;
+};
+
+constexpr struct internal_t {
+} internal;
+constexpr struct send_t {
+} send;
+constexpr struct receive_t {
+} receive;
+
+template <typename Tag>
+struct LamportClock {
+  using timestamp_t = timestamp<Tag>;
+
+  auto get_timestamp(internal_t) -> timestamp_t { return timestamp_t{++internal}; };
+  auto get_timestamp(send_t) -> timestamp_t { return timestamp_t{++internal}; };
+  auto get_timestamp(receive_t, timestamp_t received_timestamp) -> timestamp_t {
+    while (true) {
+      auto local_current = internal.load(std::memory_order_acquire);
+      auto next = std::max(received_timestamp.value_, local_current) + 1;
+      bool res = internal.compare_exchange_weak(local_current, next, std::memory_order_acq_rel);
+      if (res) return timestamp_t{next};
+    }
+  };
+
+ private:
+  std::atomic<uint64_t> internal = 0;
+};
+
+}  // namespace memgraph::distributed

src/distributed/lamport_clock.cpp

@@ -0,0 +1,11 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+#include "distributed/lamport_clock.hpp"

src/flags/CMakeLists.txt

@@ -0,0 +1,10 @@
+add_library(mg-flags STATIC audit.cpp
+                            bolt.cpp
+                            general.cpp
+                            isolation_level.cpp
+                            log_level.cpp
+                            memory_limit.cpp
+                            run_time_configurable.cpp
+                            storage_mode.cpp)
+target_include_directories(mg-flags PUBLIC ${CMAKE_SOURCE_DIR}/include)
+target_link_libraries(mg-flags PUBLIC spdlog::spdlog mg-settings mg-utils)

src/flags/all.hpp

@@ -0,0 +1,20 @@
+// Copyright 2023 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+#pragma once
+
+#include "flags/audit.hpp"
+#include "flags/bolt.hpp"
+#include "flags/general.hpp"
+#include "flags/isolation_level.hpp"
+#include "flags/log_level.hpp"
+#include "flags/memory_limit.hpp"
+#include "flags/run_time_configurable.hpp"
+#include "flags/storage_mode.hpp"