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Stop the master relaying USER_SYNC for other workers (#7318)

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Long story short: if we're handling presence on the current worker, we shouldn't be sending USER_SYNC commands over replication.

In an attempt to figure out what is going on here, I ended up refactoring some bits of the presencehandler code, so the first 4 commits here are non-functional refactors to move this code slightly closer to sanity. (There's still plenty to do here :/). Suggest reviewing individual commits.

Fixes (I hope) #7257.
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Richard van der Hoff 2020-04-22 22:39:04 +01:00 • committed by GitHub
parent 841c581c40
commit 71a1abb8a1
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10 changed files with 199 additions and 159 deletions
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7
synapse/replication/tcp/commands.py
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@ -210,7 +210,10 @@ class ReplicateCommand(Command):
class UserSyncCommand(Command):
"""Sent by the client to inform the server that a user has started or
stopped syncing. Used to calculate presence on the master.
stopped syncing on this process.
This is used by the process handling presence (typically the master) to
calculate who is online and who is not.
Includes a timestamp of when the last user sync was.
@ -218,7 +221,7 @@ class UserSyncCommand(Command):
USER_SYNC <instance_id> <user_id> <state> <last_sync_ms>
Where <state> is either "start" or "stop"
Where <state> is either "start" or "end"
"""
NAME = "USER_SYNC"