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57 lines
1.9 KiB
Python
57 lines
1.9 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2017 Vector Creations Ltd
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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"""This module implements the TCP replication protocol used by synapse to
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communicate between the master process and its workers (when they're enabled).
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Further details can be found in docs/tcp_replication.md
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Structure of the module:
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* handler.py - the classes used to handle sending/receiving commands to
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replication
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* command.py - the definitions of all the valid commands
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* protocol.py - the TCP protocol classes
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* resource.py - handles streaming stream updates to replications
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* streams/ - the definitions of all the valid streams
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The general interaction of the classes are:
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+---------------------+
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| ReplicationStreamer |
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+---------------------+
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v
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+---------------------------+ +----------------------+
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| ReplicationCommandHandler |---->|ReplicationDataHandler|
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+---------------------------+ +----------------------+
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| ^
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v |
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+-------------+
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| Protocols |
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| (TCP/redis) |
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+-------------+
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Where the ReplicationDataHandler (or subclasses) handles incoming stream
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updates.
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"""
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