Matej Ferencevic 96ece11cdd Move distributed transaction engine logic ...

Summary:
This change introduces a pure virtual initial implementation of the transaction
engine which is then implemented in two versions: single node and distributed.
The interface classes now have the following hierarchy:

```
    Engine (pure interface)
         |
    +----+---------- EngineDistributed (common logic)
    |                         |
EngineSingleNode      +-------+--------+
                      |                |
                 EngineMaster     EngineWorker
```

In addition to this layout the `EngineMaster` uses `EngineSingleNode` as its
underlying storage engine and only changes the necessary functions to make
them work with the `EngineWorker`.

After this change I recommend that you delete the following leftover files:
```
rm src/distributed/transactional_cache_cleaner_rpc_messages.*
rm src/transactions/common.*
rm src/transactions/engine_rpc_messages.*
```

Reviewers: teon.banek, msantl, buda

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D1589

2018-09-07 11:43:57 +02:00

2.2 KiB

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