50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
# Copyright 2017 Vector Creations Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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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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