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Clean-up presence code (#16092)
Misc. clean-ups to: * Use keyword arguments. * Return early (reducing indentation) of some functions. * Removing duplicated / unused code. * Use wrap_as_background_process.
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Patrick Cloke
GitHub
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changelog.d/16092.misc
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1
changelog.d/16092.misc
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@ -0,0 +1 @@
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Clean-up the presence code.
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@ -30,7 +30,6 @@ from types import TracebackType
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from typing import (
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TYPE_CHECKING,
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Any,
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Awaitable,
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Callable,
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Collection,
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Dict,
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@ -54,7 +53,10 @@ from synapse.appservice import ApplicationService
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from synapse.events.presence_router import PresenceRouter
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from synapse.logging.context import run_in_background
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from synapse.metrics import LaterGauge
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.metrics.background_process_metrics import (
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run_as_background_process,
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wrap_as_background_process,
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)
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from synapse.replication.http.presence import (
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ReplicationBumpPresenceActiveTime,
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ReplicationPresenceSetState,
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@ -141,6 +143,8 @@ class BasePresenceHandler(abc.ABC):
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self.state = hs.get_state_handler()
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self.is_mine_id = hs.is_mine_id
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self._presence_enabled = hs.config.server.use_presence
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self._federation = None
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if hs.should_send_federation():
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self._federation = hs.get_federation_sender()
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@ -149,6 +153,15 @@ class BasePresenceHandler(abc.ABC):
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self._busy_presence_enabled = hs.config.experimental.msc3026_enabled
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self.VALID_PRESENCE: Tuple[str, ...] = (
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PresenceState.ONLINE,
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PresenceState.UNAVAILABLE,
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PresenceState.OFFLINE,
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)
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if self._busy_presence_enabled:
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self.VALID_PRESENCE += (PresenceState.BUSY,)
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active_presence = self.store.take_presence_startup_info()
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self.user_to_current_state = {state.user_id: state for state in active_presence}
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@ -395,8 +408,6 @@ class WorkerPresenceHandler(BasePresenceHandler):
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self._presence_writer_instance = hs.config.worker.writers.presence[0]
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self._presence_enabled = hs.config.server.use_presence
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# Route presence EDUs to the right worker
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hs.get_federation_registry().register_instances_for_edu(
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EduTypes.PRESENCE,
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@ -421,8 +432,6 @@ class WorkerPresenceHandler(BasePresenceHandler):
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self.send_stop_syncing, UPDATE_SYNCING_USERS_MS
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)
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self._busy_presence_enabled = hs.config.experimental.msc3026_enabled
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hs.get_reactor().addSystemEventTrigger(
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"before",
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"shutdown",
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@ -490,7 +499,9 @@ class WorkerPresenceHandler(BasePresenceHandler):
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# what the spec wants: see comment in the BasePresenceHandler version
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# of this function.
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await self.set_state(
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UserID.from_string(user_id), {"presence": presence_state}, True
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UserID.from_string(user_id),
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{"presence": presence_state},
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ignore_status_msg=True,
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)
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curr_sync = self._user_to_num_current_syncs.get(user_id, 0)
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@ -601,22 +612,13 @@ class WorkerPresenceHandler(BasePresenceHandler):
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"""
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presence = state["presence"]
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valid_presence = (
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PresenceState.ONLINE,
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PresenceState.UNAVAILABLE,
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PresenceState.OFFLINE,
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PresenceState.BUSY,
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)
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if presence not in valid_presence or (
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presence == PresenceState.BUSY and not self._busy_presence_enabled
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):
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if presence not in self.VALID_PRESENCE:
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raise SynapseError(400, "Invalid presence state")
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user_id = target_user.to_string()
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# If presence is disabled, no-op
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if not self.hs.config.server.use_presence:
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if not self._presence_enabled:
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return
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# Proxy request to instance that writes presence
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@ -633,7 +635,7 @@ class WorkerPresenceHandler(BasePresenceHandler):
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with the app.
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"""
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# If presence is disabled, no-op
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if not self.hs.config.server.use_presence:
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if not self._presence_enabled:
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return
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# Proxy request to instance that writes presence
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@ -649,7 +651,6 @@ class PresenceHandler(BasePresenceHandler):
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self.hs = hs
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self.wheel_timer: WheelTimer[str] = WheelTimer()
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self.notifier = hs.get_notifier()
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self._presence_enabled = hs.config.server.use_presence
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federation_registry = hs.get_federation_registry()
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@ -700,8 +701,6 @@ class PresenceHandler(BasePresenceHandler):
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self._on_shutdown,
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)
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self._next_serial = 1
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# Keeps track of the number of *ongoing* syncs on this process. While
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# this is non zero a user will never go offline.
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self.user_to_num_current_syncs: Dict[str, int] = {}
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@ -723,22 +722,17 @@ class PresenceHandler(BasePresenceHandler):
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# Start a LoopingCall in 30s that fires every 5s.
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# The initial delay is to allow disconnected clients a chance to
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# reconnect before we treat them as offline.
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def run_timeout_handler() -> Awaitable[None]:
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return run_as_background_process(
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"handle_presence_timeouts", self._handle_timeouts
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self.clock.call_later(
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30, self.clock.looping_call, self._handle_timeouts, 5000
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)
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self.clock.call_later(
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30, self.clock.looping_call, run_timeout_handler, 5000
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60,
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self.clock.looping_call,
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self._persist_unpersisted_changes,
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60 * 1000,
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)
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def run_persister() -> Awaitable[None]:
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return run_as_background_process(
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"persist_presence_changes", self._persist_unpersisted_changes
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)
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self.clock.call_later(60, self.clock.looping_call, run_persister, 60 * 1000)
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LaterGauge(
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"synapse_handlers_presence_wheel_timer_size",
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"",
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@ -783,6 +777,7 @@ class PresenceHandler(BasePresenceHandler):
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)
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logger.info("Finished _on_shutdown")
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@wrap_as_background_process("persist_presence_changes")
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async def _persist_unpersisted_changes(self) -> None:
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"""We periodically persist the unpersisted changes, as otherwise they
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may stack up and slow down shutdown times.
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@ -898,6 +893,7 @@ class PresenceHandler(BasePresenceHandler):
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states, [destination]
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)
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@wrap_as_background_process("handle_presence_timeouts")
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async def _handle_timeouts(self) -> None:
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"""Checks the presence of users that have timed out and updates as
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appropriate.
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@ -955,7 +951,7 @@ class PresenceHandler(BasePresenceHandler):
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with the app.
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"""
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# If presence is disabled, no-op
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if not self.hs.config.server.use_presence:
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if not self._presence_enabled:
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return
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user_id = user.to_string()
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@ -990,12 +986,9 @@ class PresenceHandler(BasePresenceHandler):
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client that is being used by a user.
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presence_state: The presence state indicated in the sync request
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"""
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# Override if it should affect the user's presence, if presence is
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# disabled.
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if not self.hs.config.server.use_presence:
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affect_presence = False
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if not affect_presence or not self._presence_enabled:
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return _NullContextManager()
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if affect_presence:
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curr_sync = self.user_to_num_current_syncs.get(user_id, 0)
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self.user_to_num_current_syncs[user_id] = curr_sync + 1
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@ -1010,7 +1003,9 @@ class PresenceHandler(BasePresenceHandler):
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# updated always, which is not what the spec calls for, but synapse has done
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# this for... forever, I think.
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await self.set_state(
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UserID.from_string(user_id), {"presence": presence_state}, True
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UserID.from_string(user_id),
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{"presence": presence_state},
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ignore_status_msg=True,
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)
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# Retrieve the new state for the logic below. This should come from the
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# in-memory cache.
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@ -1034,11 +1029,7 @@ class PresenceHandler(BasePresenceHandler):
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# set_state above)
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else:
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await self._update_states(
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[
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prev_state.copy_and_replace(
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last_user_sync_ts=self.clock.time_msec()
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)
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]
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[prev_state.copy_and_replace(last_user_sync_ts=self.clock.time_msec())]
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)
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async def _end() -> None:
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@ -1061,7 +1052,6 @@ class PresenceHandler(BasePresenceHandler):
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try:
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yield
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finally:
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if affect_presence:
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run_in_background(_end)
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return _user_syncing()
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@ -1229,20 +1219,11 @@ class PresenceHandler(BasePresenceHandler):
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status_msg = state.get("status_msg", None)
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presence = state["presence"]
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valid_presence = (
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PresenceState.ONLINE,
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PresenceState.UNAVAILABLE,
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PresenceState.OFFLINE,
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PresenceState.BUSY,
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)
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if presence not in valid_presence or (
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presence == PresenceState.BUSY and not self._busy_presence_enabled
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):
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if presence not in self.VALID_PRESENCE:
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raise SynapseError(400, "Invalid presence state")
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# If presence is disabled, no-op
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if not self.hs.config.server.use_presence:
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if not self._presence_enabled:
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return
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user_id = target_user.to_string()
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