e8850549d2
* Decouple BoltSession and communication::bolt::Session * Add CREATE/USE/DROP DATABASE * Add SHOW DATABASES * Cover WebSocket session * Simple session safety implemented via RWLock * Storage symlinks for backward. compatibility * Extend the audit log with the DB info * Add auth part * Add tenant recovery
111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
// Copyright 2023 Memgraph Ltd.
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//
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// Use of this software is governed by the Business Source License
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// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
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// License, and you may not use this file except in compliance with the Business Source License.
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//
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// As of the Change Date specified in that file, in accordance with
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// the Business Source License, use of this software will be governed
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// by the Apache License, Version 2.0, included in the file
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// licenses/APL.txt.
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#pragma once
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#include <concepts>
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#include <cstdint>
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#include <string>
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#include "utils/exceptions.hpp"
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namespace memgraph::dbms {
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enum class DeleteError : uint8_t {
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DEFAULT_DB,
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USING,
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NON_EXISTENT,
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FAIL,
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DISK_FAIL,
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};
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enum class NewError : uint8_t {
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NO_CONFIGS,
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EXISTS,
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DEFUNCT,
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GENERIC,
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};
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enum class SetForResult : uint8_t {
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SUCCESS,
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ALREADY_SET,
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FAIL,
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};
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/**
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* UnknownSession Exception
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*
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* Used to indicate that an unknown session was used.
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*/
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class UnknownSessionException : public utils::BasicException {
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public:
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using utils::BasicException::BasicException;
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};
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/**
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* UnknownDatabase Exception
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*
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* Used to indicate that an unknown database was used.
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*/
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class UnknownDatabaseException : public utils::BasicException {
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public:
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using utils::BasicException::BasicException;
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};
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/**
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* @brief Session interface used by the DBMS to handle the the active sessions.
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* @todo Try to remove this dependency from SessionContextHandler. OnDelete could be removed, as it only does an assert.
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* OnChange could be removed if SetFor returned the pointer and the called then handled the OnChange execution.
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* However, the interface is very useful to decouple the interpreter's query execution and the sessions themselves.
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*/
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class SessionInterface {
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public:
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SessionInterface() = default;
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virtual ~SessionInterface() = default;
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SessionInterface(const SessionInterface &) = default;
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SessionInterface &operator=(const SessionInterface &) = default;
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SessionInterface(SessionInterface &&) noexcept = default;
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SessionInterface &operator=(SessionInterface &&) noexcept = default;
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/**
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* @brief Return the unique string identifying the session.
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*
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* @return std::string
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*/
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virtual std::string UUID() const = 0;
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/**
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* @brief Return the currently active database.
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*
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* @return std::string
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*/
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virtual std::string GetDatabaseName() const = 0;
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#ifdef MG_ENTERPRISE
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/**
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* @brief Gets called on database change.
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*
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* @return SetForResult enum (SUCCESS, ALREADY_SET or FAIL)
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*/
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virtual dbms::SetForResult OnChange(const std::string &) = 0;
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/**
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* @brief Callback that gets called on database delete (drop).
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*
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* @return true on success
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*/
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virtual bool OnDelete(const std::string &) = 0;
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#endif
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};
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} // namespace memgraph::dbms
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