mirror of
https://mau.dev/maunium/synapse.git
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1862 lines
70 KiB
Python
1862 lines
70 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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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 is responsible for keeping track of presence status of local
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and remote users.
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The methods that define policy are:
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- PresenceHandler._update_states
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- PresenceHandler._handle_timeouts
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- should_notify
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"""
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import abc
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import contextlib
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import logging
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from contextlib import contextmanager
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from typing import (
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TYPE_CHECKING,
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Dict,
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FrozenSet,
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Iterable,
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List,
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Optional,
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Set,
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Tuple,
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Union,
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)
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from prometheus_client import Counter
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from typing_extensions import ContextManager
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import synapse.metrics
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from synapse.api.constants import EventTypes, Membership, PresenceState
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from synapse.api.errors import SynapseError
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from synapse.api.presence import UserPresenceState
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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.logging.utils import log_function
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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.replication.http.presence import (
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ReplicationBumpPresenceActiveTime,
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ReplicationPresenceSetState,
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)
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from synapse.replication.tcp.commands import ClearUserSyncsCommand
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from synapse.state import StateHandler
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from synapse.storage.databases.main import DataStore
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from synapse.types import Collection, JsonDict, UserID, get_domain_from_id
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from synapse.util.async_helpers import Linearizer
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from synapse.util.caches.descriptors import _CacheContext, cached
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from synapse.util.metrics import Measure
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from synapse.util.wheel_timer import WheelTimer
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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notified_presence_counter = Counter("synapse_handler_presence_notified_presence", "")
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federation_presence_out_counter = Counter(
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"synapse_handler_presence_federation_presence_out", ""
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)
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presence_updates_counter = Counter("synapse_handler_presence_presence_updates", "")
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timers_fired_counter = Counter("synapse_handler_presence_timers_fired", "")
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federation_presence_counter = Counter(
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"synapse_handler_presence_federation_presence", ""
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)
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bump_active_time_counter = Counter("synapse_handler_presence_bump_active_time", "")
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get_updates_counter = Counter("synapse_handler_presence_get_updates", "", ["type"])
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notify_reason_counter = Counter(
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"synapse_handler_presence_notify_reason", "", ["reason"]
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)
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state_transition_counter = Counter(
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"synapse_handler_presence_state_transition", "", ["from", "to"]
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)
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# If a user was last active in the last LAST_ACTIVE_GRANULARITY, consider them
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# "currently_active"
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LAST_ACTIVE_GRANULARITY = 60 * 1000
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# How long to wait until a new /events or /sync request before assuming
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# the client has gone.
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SYNC_ONLINE_TIMEOUT = 30 * 1000
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# How long to wait before marking the user as idle. Compared against last active
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IDLE_TIMER = 5 * 60 * 1000
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# How often we expect remote servers to resend us presence.
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FEDERATION_TIMEOUT = 30 * 60 * 1000
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# How often to resend presence to remote servers
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FEDERATION_PING_INTERVAL = 25 * 60 * 1000
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# How long we will wait before assuming that the syncs from an external process
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# are dead.
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EXTERNAL_PROCESS_EXPIRY = 5 * 60 * 1000
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# Delay before a worker tells the presence handler that a user has stopped
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# syncing.
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UPDATE_SYNCING_USERS_MS = 10 * 1000
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assert LAST_ACTIVE_GRANULARITY < IDLE_TIMER
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class BasePresenceHandler(abc.ABC):
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"""Parts of the PresenceHandler that are shared between workers and master"""
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def __init__(self, hs: "HomeServer"):
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self.clock = hs.get_clock()
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self.store = hs.get_datastore()
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self.presence_router = hs.get_presence_router()
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self.state = hs.get_state_handler()
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self._federation = None
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if hs.should_send_federation() or not hs.config.worker_app:
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self._federation = hs.get_federation_sender()
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self._send_federation = hs.should_send_federation()
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self._busy_presence_enabled = hs.config.experimental.msc3026_enabled
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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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@abc.abstractmethod
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async def user_syncing(
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self, user_id: str, affect_presence: bool
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) -> ContextManager[None]:
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"""Returns a context manager that should surround any stream requests
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from the user.
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This allows us to keep track of who is currently streaming and who isn't
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without having to have timers outside of this module to avoid flickering
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when users disconnect/reconnect.
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Args:
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user_id: the user that is starting a sync
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affect_presence: If false this function will be a no-op.
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Useful for streams that are not associated with an actual
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client that is being used by a user.
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"""
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@abc.abstractmethod
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def get_currently_syncing_users_for_replication(self) -> Iterable[str]:
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"""Get an iterable of syncing users on this worker, to send to the presence handler
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This is called when a replication connection is established. It should return
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a list of user ids, which are then sent as USER_SYNC commands to inform the
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process handling presence about those users.
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Returns:
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An iterable of user_id strings.
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"""
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async def get_state(self, target_user: UserID) -> UserPresenceState:
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results = await self.get_states([target_user.to_string()])
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return results[0]
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async def get_states(
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self, target_user_ids: Iterable[str]
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) -> List[UserPresenceState]:
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"""Get the presence state for users."""
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updates_d = await self.current_state_for_users(target_user_ids)
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updates = list(updates_d.values())
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for user_id in set(target_user_ids) - {u.user_id for u in updates}:
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updates.append(UserPresenceState.default(user_id))
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return updates
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async def current_state_for_users(
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self, user_ids: Iterable[str]
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) -> Dict[str, UserPresenceState]:
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"""Get the current presence state for multiple users.
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Returns:
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dict: `user_id` -> `UserPresenceState`
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"""
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states = {
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user_id: self.user_to_current_state.get(user_id, None)
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for user_id in user_ids
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}
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missing = [user_id for user_id, state in states.items() if not state]
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if missing:
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# There are things not in our in memory cache. Lets pull them out of
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# the database.
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res = await self.store.get_presence_for_users(missing)
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states.update(res)
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missing = [user_id for user_id, state in states.items() if not state]
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if missing:
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new = {
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user_id: UserPresenceState.default(user_id) for user_id in missing
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}
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states.update(new)
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self.user_to_current_state.update(new)
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return states
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@abc.abstractmethod
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async def set_state(
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self, target_user: UserID, state: JsonDict, ignore_status_msg: bool = False
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) -> None:
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"""Set the presence state of the user. """
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@abc.abstractmethod
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async def bump_presence_active_time(self, user: UserID):
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"""We've seen the user do something that indicates they're interacting
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with the app.
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"""
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async def update_external_syncs_row(
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self, process_id, user_id, is_syncing, sync_time_msec
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):
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"""Update the syncing users for an external process as a delta.
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This is a no-op when presence is handled by a different worker.
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Args:
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process_id (str): An identifier for the process the users are
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syncing against. This allows synapse to process updates
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as user start and stop syncing against a given process.
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user_id (str): The user who has started or stopped syncing
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is_syncing (bool): Whether or not the user is now syncing
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sync_time_msec(int): Time in ms when the user was last syncing
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"""
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pass
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async def update_external_syncs_clear(self, process_id):
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"""Marks all users that had been marked as syncing by a given process
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as offline.
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Used when the process has stopped/disappeared.
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This is a no-op when presence is handled by a different worker.
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"""
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pass
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async def process_replication_rows(self, token, rows):
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"""Process presence stream rows received over replication."""
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pass
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async def maybe_send_presence_to_interested_destinations(
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self, states: List[UserPresenceState]
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):
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"""If this instance is a federation sender, send the states to all
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destinations that are interested.
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"""
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if not self._send_federation:
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return
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# If this worker sends federation we must have a FederationSender.
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assert self._federation
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hosts_and_states = await get_interested_remotes(
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self.store,
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self.presence_router,
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states,
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self.state,
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)
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for destinations, states in hosts_and_states:
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self._federation.send_presence_to_destinations(states, destinations)
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class _NullContextManager(ContextManager[None]):
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"""A context manager which does nothing."""
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def __exit__(self, exc_type, exc_val, exc_tb):
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pass
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class WorkerPresenceHandler(BasePresenceHandler):
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def __init__(self, hs):
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super().__init__(hs)
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self.hs = hs
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self.is_mine_id = hs.is_mine_id
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self._presence_enabled = hs.config.use_presence
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# The number of ongoing syncs on this process, by user id.
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# Empty if _presence_enabled is false.
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self._user_to_num_current_syncs = {} # type: Dict[str, int]
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self.notifier = hs.get_notifier()
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self.instance_id = hs.get_instance_id()
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# user_id -> last_sync_ms. Lists the users that have stopped syncing
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# but we haven't notified the master of that yet
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self.users_going_offline = {}
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self._bump_active_client = ReplicationBumpPresenceActiveTime.make_client(hs)
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self._set_state_client = ReplicationPresenceSetState.make_client(hs)
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self._send_stop_syncing_loop = self.clock.looping_call(
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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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run_as_background_process,
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"generic_presence.on_shutdown",
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self._on_shutdown,
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)
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def _on_shutdown(self):
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if self._presence_enabled:
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self.hs.get_tcp_replication().send_command(
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ClearUserSyncsCommand(self.instance_id)
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)
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def send_user_sync(self, user_id, is_syncing, last_sync_ms):
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if self._presence_enabled:
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self.hs.get_tcp_replication().send_user_sync(
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self.instance_id, user_id, is_syncing, last_sync_ms
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)
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def mark_as_coming_online(self, user_id):
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"""A user has started syncing. Send a UserSync to the master, unless they
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had recently stopped syncing.
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Args:
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user_id (str)
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"""
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going_offline = self.users_going_offline.pop(user_id, None)
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if not going_offline:
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# Safe to skip because we haven't yet told the master they were offline
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self.send_user_sync(user_id, True, self.clock.time_msec())
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def mark_as_going_offline(self, user_id):
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"""A user has stopped syncing. We wait before notifying the master as
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its likely they'll come back soon. This allows us to avoid sending
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a stopped syncing immediately followed by a started syncing notification
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to the master
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Args:
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user_id (str)
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"""
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self.users_going_offline[user_id] = self.clock.time_msec()
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def send_stop_syncing(self):
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"""Check if there are any users who have stopped syncing a while ago
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and haven't come back yet. If there are poke the master about them.
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"""
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now = self.clock.time_msec()
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for user_id, last_sync_ms in list(self.users_going_offline.items()):
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if now - last_sync_ms > UPDATE_SYNCING_USERS_MS:
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self.users_going_offline.pop(user_id, None)
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self.send_user_sync(user_id, False, last_sync_ms)
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async def user_syncing(
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self, user_id: str, affect_presence: bool
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) -> ContextManager[None]:
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"""Record that a user is syncing.
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Called by the sync and events servlets to record that a user has connected to
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this worker and is waiting for some events.
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"""
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if not affect_presence or not self._presence_enabled:
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return _NullContextManager()
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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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# If we went from no in flight sync to some, notify replication
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if self._user_to_num_current_syncs[user_id] == 1:
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self.mark_as_coming_online(user_id)
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def _end():
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# We check that the user_id is in user_to_num_current_syncs because
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# user_to_num_current_syncs may have been cleared if we are
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# shutting down.
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if user_id in self._user_to_num_current_syncs:
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self._user_to_num_current_syncs[user_id] -= 1
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# If we went from one in flight sync to non, notify replication
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if self._user_to_num_current_syncs[user_id] == 0:
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self.mark_as_going_offline(user_id)
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@contextlib.contextmanager
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def _user_syncing():
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try:
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yield
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finally:
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_end()
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return _user_syncing()
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async def notify_from_replication(self, states, stream_id):
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parties = await get_interested_parties(self.store, self.presence_router, states)
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room_ids_to_states, users_to_states = parties
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self.notifier.on_new_event(
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"presence_key",
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stream_id,
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rooms=room_ids_to_states.keys(),
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users=users_to_states.keys(),
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)
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# If this is a federation sender, notify about presence updates.
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await self.maybe_send_presence_to_interested_destinations(states)
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async def process_replication_rows(self, token, rows):
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states = [
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UserPresenceState(
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row.user_id,
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row.state,
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row.last_active_ts,
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row.last_federation_update_ts,
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row.last_user_sync_ts,
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row.status_msg,
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row.currently_active,
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)
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for row in rows
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]
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for state in states:
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self.user_to_current_state[state.user_id] = state
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stream_id = token
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await self.notify_from_replication(states, stream_id)
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def get_currently_syncing_users_for_replication(self) -> Iterable[str]:
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return [
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user_id
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for user_id, count in self._user_to_num_current_syncs.items()
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if count > 0
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]
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async def set_state(self, target_user, state, ignore_status_msg=False):
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"""Set the presence state of the user."""
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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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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.use_presence:
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return
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# Proxy request to master
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await self._set_state_client(
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user_id=user_id, state=state, ignore_status_msg=ignore_status_msg
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)
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async def bump_presence_active_time(self, user):
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"""We've seen the user do something that indicates they're interacting
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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.use_presence:
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return
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# Proxy request to master
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user_id = user.to_string()
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await self._bump_active_client(user_id=user_id)
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|
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class PresenceHandler(BasePresenceHandler):
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def __init__(self, hs: "HomeServer"):
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super().__init__(hs)
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self.hs = hs
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self.is_mine_id = hs.is_mine_id
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self.server_name = hs.hostname
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self.wheel_timer = WheelTimer()
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self.notifier = hs.get_notifier()
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self._presence_enabled = hs.config.use_presence
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federation_registry = hs.get_federation_registry()
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federation_registry.register_edu_handler("m.presence", self.incoming_presence)
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|
LaterGauge(
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"synapse_handlers_presence_user_to_current_state_size",
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"",
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[],
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lambda: len(self.user_to_current_state),
|
|
)
|
|
|
|
now = self.clock.time_msec()
|
|
for state in self.user_to_current_state.values():
|
|
self.wheel_timer.insert(
|
|
now=now, obj=state.user_id, then=state.last_active_ts + IDLE_TIMER
|
|
)
|
|
self.wheel_timer.insert(
|
|
now=now,
|
|
obj=state.user_id,
|
|
then=state.last_user_sync_ts + SYNC_ONLINE_TIMEOUT,
|
|
)
|
|
if self.is_mine_id(state.user_id):
|
|
self.wheel_timer.insert(
|
|
now=now,
|
|
obj=state.user_id,
|
|
then=state.last_federation_update_ts + FEDERATION_PING_INTERVAL,
|
|
)
|
|
else:
|
|
self.wheel_timer.insert(
|
|
now=now,
|
|
obj=state.user_id,
|
|
then=state.last_federation_update_ts + FEDERATION_TIMEOUT,
|
|
)
|
|
|
|
# Set of users who have presence in the `user_to_current_state` that
|
|
# have not yet been persisted
|
|
self.unpersisted_users_changes = set() # type: Set[str]
|
|
|
|
hs.get_reactor().addSystemEventTrigger(
|
|
"before",
|
|
"shutdown",
|
|
run_as_background_process,
|
|
"presence.on_shutdown",
|
|
self._on_shutdown,
|
|
)
|
|
|
|
self._next_serial = 1
|
|
|
|
# Keeps track of the number of *ongoing* syncs on this process. While
|
|
# this is non zero a user will never go offline.
|
|
self.user_to_num_current_syncs = {} # type: Dict[str, int]
|
|
|
|
# Keeps track of the number of *ongoing* syncs on other processes.
|
|
# While any sync is ongoing on another process the user will never
|
|
# go offline.
|
|
# Each process has a unique identifier and an update frequency. If
|
|
# no update is received from that process within the update period then
|
|
# we assume that all the sync requests on that process have stopped.
|
|
# Stored as a dict from process_id to set of user_id, and a dict of
|
|
# process_id to millisecond timestamp last updated.
|
|
self.external_process_to_current_syncs = {} # type: Dict[int, Set[str]]
|
|
self.external_process_last_updated_ms = {} # type: Dict[int, int]
|
|
|
|
self.external_sync_linearizer = Linearizer(name="external_sync_linearizer")
|
|
|
|
if self._presence_enabled:
|
|
# Start a LoopingCall in 30s that fires every 5s.
|
|
# The initial delay is to allow disconnected clients a chance to
|
|
# reconnect before we treat them as offline.
|
|
def run_timeout_handler():
|
|
return run_as_background_process(
|
|
"handle_presence_timeouts", self._handle_timeouts
|
|
)
|
|
|
|
self.clock.call_later(
|
|
30, self.clock.looping_call, run_timeout_handler, 5000
|
|
)
|
|
|
|
def run_persister():
|
|
return run_as_background_process(
|
|
"persist_presence_changes", self._persist_unpersisted_changes
|
|
)
|
|
|
|
self.clock.call_later(60, self.clock.looping_call, run_persister, 60 * 1000)
|
|
|
|
LaterGauge(
|
|
"synapse_handlers_presence_wheel_timer_size",
|
|
"",
|
|
[],
|
|
lambda: len(self.wheel_timer),
|
|
)
|
|
|
|
# Used to handle sending of presence to newly joined users/servers
|
|
if self._presence_enabled:
|
|
self.notifier.add_replication_callback(self.notify_new_event)
|
|
|
|
# Presence is best effort and quickly heals itself, so lets just always
|
|
# stream from the current state when we restart.
|
|
self._event_pos = self.store.get_current_events_token()
|
|
self._event_processing = False
|
|
|
|
async def _on_shutdown(self):
|
|
"""Gets called when shutting down. This lets us persist any updates that
|
|
we haven't yet persisted, e.g. updates that only changes some internal
|
|
timers. This allows changes to persist across startup without having to
|
|
persist every single change.
|
|
|
|
If this does not run it simply means that some of the timers will fire
|
|
earlier than they should when synapse is restarted. This affect of this
|
|
is some spurious presence changes that will self-correct.
|
|
"""
|
|
# If the DB pool has already terminated, don't try updating
|
|
if not self.store.db_pool.is_running():
|
|
return
|
|
|
|
logger.info(
|
|
"Performing _on_shutdown. Persisting %d unpersisted changes",
|
|
len(self.user_to_current_state),
|
|
)
|
|
|
|
if self.unpersisted_users_changes:
|
|
|
|
await self.store.update_presence(
|
|
[
|
|
self.user_to_current_state[user_id]
|
|
for user_id in self.unpersisted_users_changes
|
|
]
|
|
)
|
|
logger.info("Finished _on_shutdown")
|
|
|
|
async def _persist_unpersisted_changes(self):
|
|
"""We periodically persist the unpersisted changes, as otherwise they
|
|
may stack up and slow down shutdown times.
|
|
"""
|
|
unpersisted = self.unpersisted_users_changes
|
|
self.unpersisted_users_changes = set()
|
|
|
|
if unpersisted:
|
|
logger.info("Persisting %d unpersisted presence updates", len(unpersisted))
|
|
await self.store.update_presence(
|
|
[self.user_to_current_state[user_id] for user_id in unpersisted]
|
|
)
|
|
|
|
async def _update_states(self, new_states: Iterable[UserPresenceState]) -> None:
|
|
"""Updates presence of users. Sets the appropriate timeouts. Pokes
|
|
the notifier and federation if and only if the changed presence state
|
|
should be sent to clients/servers.
|
|
|
|
Args:
|
|
new_states: The new user presence state updates to process.
|
|
"""
|
|
now = self.clock.time_msec()
|
|
|
|
with Measure(self.clock, "presence_update_states"):
|
|
|
|
# NOTE: We purposefully don't await between now and when we've
|
|
# calculated what we want to do with the new states, to avoid races.
|
|
|
|
to_notify = {} # Changes we want to notify everyone about
|
|
to_federation_ping = {} # These need sending keep-alives
|
|
|
|
# Only bother handling the last presence change for each user
|
|
new_states_dict = {}
|
|
for new_state in new_states:
|
|
new_states_dict[new_state.user_id] = new_state
|
|
new_states = new_states_dict.values()
|
|
|
|
for new_state in new_states:
|
|
user_id = new_state.user_id
|
|
|
|
# Its fine to not hit the database here, as the only thing not in
|
|
# the current state cache are OFFLINE states, where the only field
|
|
# of interest is last_active which is safe enough to assume is 0
|
|
# here.
|
|
prev_state = self.user_to_current_state.get(
|
|
user_id, UserPresenceState.default(user_id)
|
|
)
|
|
|
|
new_state, should_notify, should_ping = handle_update(
|
|
prev_state,
|
|
new_state,
|
|
is_mine=self.is_mine_id(user_id),
|
|
wheel_timer=self.wheel_timer,
|
|
now=now,
|
|
)
|
|
|
|
self.user_to_current_state[user_id] = new_state
|
|
|
|
if should_notify:
|
|
to_notify[user_id] = new_state
|
|
elif should_ping:
|
|
to_federation_ping[user_id] = new_state
|
|
|
|
# TODO: We should probably ensure there are no races hereafter
|
|
|
|
presence_updates_counter.inc(len(new_states))
|
|
|
|
if to_notify:
|
|
notified_presence_counter.inc(len(to_notify))
|
|
await self._persist_and_notify(list(to_notify.values()))
|
|
|
|
self.unpersisted_users_changes |= {s.user_id for s in new_states}
|
|
self.unpersisted_users_changes -= set(to_notify.keys())
|
|
|
|
# Check if we need to resend any presence states to remote hosts. We
|
|
# only do this for states that haven't been updated in a while to
|
|
# ensure that the remote host doesn't time the presence state out.
|
|
#
|
|
# Note that since these are states that have *not* been updated,
|
|
# they won't get sent down the normal presence replication stream,
|
|
# and so we have to explicitly send them via the federation stream.
|
|
to_federation_ping = {
|
|
user_id: state
|
|
for user_id, state in to_federation_ping.items()
|
|
if user_id not in to_notify
|
|
}
|
|
if to_federation_ping:
|
|
federation_presence_out_counter.inc(len(to_federation_ping))
|
|
|
|
hosts_and_states = await get_interested_remotes(
|
|
self.store,
|
|
self.presence_router,
|
|
list(to_federation_ping.values()),
|
|
self.state,
|
|
)
|
|
|
|
# Since this is master we know that we have a federation sender or
|
|
# queue, and so this will be defined.
|
|
assert self._federation
|
|
|
|
for destinations, states in hosts_and_states:
|
|
self._federation.send_presence_to_destinations(states, destinations)
|
|
|
|
async def _handle_timeouts(self):
|
|
"""Checks the presence of users that have timed out and updates as
|
|
appropriate.
|
|
"""
|
|
logger.debug("Handling presence timeouts")
|
|
now = self.clock.time_msec()
|
|
|
|
# Fetch the list of users that *may* have timed out. Things may have
|
|
# changed since the timeout was set, so we won't necessarily have to
|
|
# take any action.
|
|
users_to_check = set(self.wheel_timer.fetch(now))
|
|
|
|
# Check whether the lists of syncing processes from an external
|
|
# process have expired.
|
|
expired_process_ids = [
|
|
process_id
|
|
for process_id, last_update in self.external_process_last_updated_ms.items()
|
|
if now - last_update > EXTERNAL_PROCESS_EXPIRY
|
|
]
|
|
for process_id in expired_process_ids:
|
|
# For each expired process drop tracking info and check the users
|
|
# that were syncing on that process to see if they need to be timed
|
|
# out.
|
|
users_to_check.update(
|
|
self.external_process_to_current_syncs.pop(process_id, ())
|
|
)
|
|
self.external_process_last_updated_ms.pop(process_id)
|
|
|
|
states = [
|
|
self.user_to_current_state.get(user_id, UserPresenceState.default(user_id))
|
|
for user_id in users_to_check
|
|
]
|
|
|
|
timers_fired_counter.inc(len(states))
|
|
|
|
syncing_user_ids = {
|
|
user_id
|
|
for user_id, count in self.user_to_num_current_syncs.items()
|
|
if count
|
|
}
|
|
for user_ids in self.external_process_to_current_syncs.values():
|
|
syncing_user_ids.update(user_ids)
|
|
|
|
changes = handle_timeouts(
|
|
states,
|
|
is_mine_fn=self.is_mine_id,
|
|
syncing_user_ids=syncing_user_ids,
|
|
now=now,
|
|
)
|
|
|
|
return await self._update_states(changes)
|
|
|
|
async def bump_presence_active_time(self, user):
|
|
"""We've seen the user do something that indicates they're interacting
|
|
with the app.
|
|
"""
|
|
# If presence is disabled, no-op
|
|
if not self.hs.config.use_presence:
|
|
return
|
|
|
|
user_id = user.to_string()
|
|
|
|
bump_active_time_counter.inc()
|
|
|
|
prev_state = await self.current_state_for_user(user_id)
|
|
|
|
new_fields = {"last_active_ts": self.clock.time_msec()}
|
|
if prev_state.state == PresenceState.UNAVAILABLE:
|
|
new_fields["state"] = PresenceState.ONLINE
|
|
|
|
await self._update_states([prev_state.copy_and_replace(**new_fields)])
|
|
|
|
async def user_syncing(
|
|
self, user_id: str, affect_presence: bool = True
|
|
) -> ContextManager[None]:
|
|
"""Returns a context manager that should surround any stream requests
|
|
from the user.
|
|
|
|
This allows us to keep track of who is currently streaming and who isn't
|
|
without having to have timers outside of this module to avoid flickering
|
|
when users disconnect/reconnect.
|
|
|
|
Args:
|
|
user_id (str)
|
|
affect_presence (bool): If false this function will be a no-op.
|
|
Useful for streams that are not associated with an actual
|
|
client that is being used by a user.
|
|
"""
|
|
# Override if it should affect the user's presence, if presence is
|
|
# disabled.
|
|
if not self.hs.config.use_presence:
|
|
affect_presence = False
|
|
|
|
if affect_presence:
|
|
curr_sync = self.user_to_num_current_syncs.get(user_id, 0)
|
|
self.user_to_num_current_syncs[user_id] = curr_sync + 1
|
|
|
|
prev_state = await self.current_state_for_user(user_id)
|
|
if prev_state.state == PresenceState.OFFLINE:
|
|
# If they're currently offline then bring them online, otherwise
|
|
# just update the last sync times.
|
|
await self._update_states(
|
|
[
|
|
prev_state.copy_and_replace(
|
|
state=PresenceState.ONLINE,
|
|
last_active_ts=self.clock.time_msec(),
|
|
last_user_sync_ts=self.clock.time_msec(),
|
|
)
|
|
]
|
|
)
|
|
else:
|
|
await self._update_states(
|
|
[
|
|
prev_state.copy_and_replace(
|
|
last_user_sync_ts=self.clock.time_msec()
|
|
)
|
|
]
|
|
)
|
|
|
|
async def _end():
|
|
try:
|
|
self.user_to_num_current_syncs[user_id] -= 1
|
|
|
|
prev_state = await self.current_state_for_user(user_id)
|
|
await self._update_states(
|
|
[
|
|
prev_state.copy_and_replace(
|
|
last_user_sync_ts=self.clock.time_msec()
|
|
)
|
|
]
|
|
)
|
|
except Exception:
|
|
logger.exception("Error updating presence after sync")
|
|
|
|
@contextmanager
|
|
def _user_syncing():
|
|
try:
|
|
yield
|
|
finally:
|
|
if affect_presence:
|
|
run_in_background(_end)
|
|
|
|
return _user_syncing()
|
|
|
|
def get_currently_syncing_users_for_replication(self) -> Iterable[str]:
|
|
# since we are the process handling presence, there is nothing to do here.
|
|
return []
|
|
|
|
async def update_external_syncs_row(
|
|
self, process_id, user_id, is_syncing, sync_time_msec
|
|
):
|
|
"""Update the syncing users for an external process as a delta.
|
|
|
|
Args:
|
|
process_id (str): An identifier for the process the users are
|
|
syncing against. This allows synapse to process updates
|
|
as user start and stop syncing against a given process.
|
|
user_id (str): The user who has started or stopped syncing
|
|
is_syncing (bool): Whether or not the user is now syncing
|
|
sync_time_msec(int): Time in ms when the user was last syncing
|
|
"""
|
|
with (await self.external_sync_linearizer.queue(process_id)):
|
|
prev_state = await self.current_state_for_user(user_id)
|
|
|
|
process_presence = self.external_process_to_current_syncs.setdefault(
|
|
process_id, set()
|
|
)
|
|
|
|
updates = []
|
|
if is_syncing and user_id not in process_presence:
|
|
if prev_state.state == PresenceState.OFFLINE:
|
|
updates.append(
|
|
prev_state.copy_and_replace(
|
|
state=PresenceState.ONLINE,
|
|
last_active_ts=sync_time_msec,
|
|
last_user_sync_ts=sync_time_msec,
|
|
)
|
|
)
|
|
else:
|
|
updates.append(
|
|
prev_state.copy_and_replace(last_user_sync_ts=sync_time_msec)
|
|
)
|
|
process_presence.add(user_id)
|
|
elif user_id in process_presence:
|
|
updates.append(
|
|
prev_state.copy_and_replace(last_user_sync_ts=sync_time_msec)
|
|
)
|
|
|
|
if not is_syncing:
|
|
process_presence.discard(user_id)
|
|
|
|
if updates:
|
|
await self._update_states(updates)
|
|
|
|
self.external_process_last_updated_ms[process_id] = self.clock.time_msec()
|
|
|
|
async def update_external_syncs_clear(self, process_id):
|
|
"""Marks all users that had been marked as syncing by a given process
|
|
as offline.
|
|
|
|
Used when the process has stopped/disappeared.
|
|
"""
|
|
with (await self.external_sync_linearizer.queue(process_id)):
|
|
process_presence = self.external_process_to_current_syncs.pop(
|
|
process_id, set()
|
|
)
|
|
prev_states = await self.current_state_for_users(process_presence)
|
|
time_now_ms = self.clock.time_msec()
|
|
|
|
await self._update_states(
|
|
[
|
|
prev_state.copy_and_replace(last_user_sync_ts=time_now_ms)
|
|
for prev_state in prev_states.values()
|
|
]
|
|
)
|
|
self.external_process_last_updated_ms.pop(process_id, None)
|
|
|
|
async def current_state_for_user(self, user_id):
|
|
"""Get the current presence state for a user."""
|
|
res = await self.current_state_for_users([user_id])
|
|
return res[user_id]
|
|
|
|
async def _persist_and_notify(self, states):
|
|
"""Persist states in the database, poke the notifier and send to
|
|
interested remote servers
|
|
"""
|
|
stream_id, max_token = await self.store.update_presence(states)
|
|
|
|
parties = await get_interested_parties(self.store, self.presence_router, states)
|
|
room_ids_to_states, users_to_states = parties
|
|
|
|
self.notifier.on_new_event(
|
|
"presence_key",
|
|
stream_id,
|
|
rooms=room_ids_to_states.keys(),
|
|
users=[UserID.from_string(u) for u in users_to_states],
|
|
)
|
|
|
|
# We only want to poke the local federation sender, if any, as other
|
|
# workers will receive the presence updates via the presence replication
|
|
# stream (which is updated by `store.update_presence`).
|
|
await self.maybe_send_presence_to_interested_destinations(states)
|
|
|
|
async def incoming_presence(self, origin, content):
|
|
"""Called when we receive a `m.presence` EDU from a remote server."""
|
|
if not self._presence_enabled:
|
|
return
|
|
|
|
now = self.clock.time_msec()
|
|
updates = []
|
|
for push in content.get("push", []):
|
|
# A "push" contains a list of presence that we are probably interested
|
|
# in.
|
|
user_id = push.get("user_id", None)
|
|
if not user_id:
|
|
logger.info(
|
|
"Got presence update from %r with no 'user_id': %r", origin, push
|
|
)
|
|
continue
|
|
|
|
if get_domain_from_id(user_id) != origin:
|
|
logger.info(
|
|
"Got presence update from %r with bad 'user_id': %r",
|
|
origin,
|
|
user_id,
|
|
)
|
|
continue
|
|
|
|
presence_state = push.get("presence", None)
|
|
if not presence_state:
|
|
logger.info(
|
|
"Got presence update from %r with no 'presence_state': %r",
|
|
origin,
|
|
push,
|
|
)
|
|
continue
|
|
|
|
new_fields = {"state": presence_state, "last_federation_update_ts": now}
|
|
|
|
last_active_ago = push.get("last_active_ago", None)
|
|
if last_active_ago is not None:
|
|
new_fields["last_active_ts"] = now - last_active_ago
|
|
|
|
new_fields["status_msg"] = push.get("status_msg", None)
|
|
new_fields["currently_active"] = push.get("currently_active", False)
|
|
|
|
prev_state = await self.current_state_for_user(user_id)
|
|
updates.append(prev_state.copy_and_replace(**new_fields))
|
|
|
|
if updates:
|
|
federation_presence_counter.inc(len(updates))
|
|
await self._update_states(updates)
|
|
|
|
async def set_state(self, target_user, state, ignore_status_msg=False):
|
|
"""Set the presence state of the user."""
|
|
status_msg = state.get("status_msg", None)
|
|
presence = state["presence"]
|
|
|
|
valid_presence = (
|
|
PresenceState.ONLINE,
|
|
PresenceState.UNAVAILABLE,
|
|
PresenceState.OFFLINE,
|
|
PresenceState.BUSY,
|
|
)
|
|
|
|
if presence not in valid_presence or (
|
|
presence == PresenceState.BUSY and not self._busy_presence_enabled
|
|
):
|
|
raise SynapseError(400, "Invalid presence state")
|
|
|
|
user_id = target_user.to_string()
|
|
|
|
prev_state = await self.current_state_for_user(user_id)
|
|
|
|
new_fields = {"state": presence}
|
|
|
|
if not ignore_status_msg:
|
|
msg = status_msg if presence != PresenceState.OFFLINE else None
|
|
new_fields["status_msg"] = msg
|
|
|
|
if presence == PresenceState.ONLINE or (
|
|
presence == PresenceState.BUSY and self._busy_presence_enabled
|
|
):
|
|
new_fields["last_active_ts"] = self.clock.time_msec()
|
|
|
|
await self._update_states([prev_state.copy_and_replace(**new_fields)])
|
|
|
|
async def is_visible(self, observed_user, observer_user):
|
|
"""Returns whether a user can see another user's presence."""
|
|
observer_room_ids = await self.store.get_rooms_for_user(
|
|
observer_user.to_string()
|
|
)
|
|
observed_room_ids = await self.store.get_rooms_for_user(
|
|
observed_user.to_string()
|
|
)
|
|
|
|
if observer_room_ids & observed_room_ids:
|
|
return True
|
|
|
|
return False
|
|
|
|
async def get_all_presence_updates(
|
|
self, instance_name: str, last_id: int, current_id: int, limit: int
|
|
) -> Tuple[List[Tuple[int, list]], int, bool]:
|
|
"""
|
|
Gets a list of presence update rows from between the given stream ids.
|
|
Each row has:
|
|
- stream_id(str)
|
|
- user_id(str)
|
|
- state(str)
|
|
- last_active_ts(int)
|
|
- last_federation_update_ts(int)
|
|
- last_user_sync_ts(int)
|
|
- status_msg(int)
|
|
- currently_active(int)
|
|
|
|
Args:
|
|
instance_name: The writer we want to fetch updates from. Unused
|
|
here since there is only ever one writer.
|
|
last_id: The token to fetch updates from. Exclusive.
|
|
current_id: The token to fetch updates up to. Inclusive.
|
|
limit: The requested limit for the number of rows to return. The
|
|
function may return more or fewer rows.
|
|
|
|
Returns:
|
|
A tuple consisting of: the updates, a token to use to fetch
|
|
subsequent updates, and whether we returned fewer rows than exists
|
|
between the requested tokens due to the limit.
|
|
|
|
The token returned can be used in a subsequent call to this
|
|
function to get further updates.
|
|
|
|
The updates are a list of 2-tuples of stream ID and the row data
|
|
"""
|
|
|
|
# TODO(markjh): replicate the unpersisted changes.
|
|
# This could use the in-memory stores for recent changes.
|
|
rows = await self.store.get_all_presence_updates(
|
|
instance_name, last_id, current_id, limit
|
|
)
|
|
return rows
|
|
|
|
def notify_new_event(self):
|
|
"""Called when new events have happened. Handles users and servers
|
|
joining rooms and require being sent presence.
|
|
"""
|
|
|
|
if self._event_processing:
|
|
return
|
|
|
|
async def _process_presence():
|
|
assert not self._event_processing
|
|
|
|
self._event_processing = True
|
|
try:
|
|
await self._unsafe_process()
|
|
finally:
|
|
self._event_processing = False
|
|
|
|
run_as_background_process("presence.notify_new_event", _process_presence)
|
|
|
|
async def _unsafe_process(self):
|
|
# Loop round handling deltas until we're up to date
|
|
while True:
|
|
with Measure(self.clock, "presence_delta"):
|
|
room_max_stream_ordering = self.store.get_room_max_stream_ordering()
|
|
if self._event_pos == room_max_stream_ordering:
|
|
return
|
|
|
|
logger.debug(
|
|
"Processing presence stats %s->%s",
|
|
self._event_pos,
|
|
room_max_stream_ordering,
|
|
)
|
|
max_pos, deltas = await self.store.get_current_state_deltas(
|
|
self._event_pos, room_max_stream_ordering
|
|
)
|
|
await self._handle_state_delta(deltas)
|
|
|
|
self._event_pos = max_pos
|
|
|
|
# Expose current event processing position to prometheus
|
|
synapse.metrics.event_processing_positions.labels("presence").set(
|
|
max_pos
|
|
)
|
|
|
|
async def _handle_state_delta(self, deltas):
|
|
"""Process current state deltas to find new joins that need to be
|
|
handled.
|
|
"""
|
|
# A map of destination to a set of user state that they should receive
|
|
presence_destinations = {} # type: Dict[str, Set[UserPresenceState]]
|
|
|
|
for delta in deltas:
|
|
typ = delta["type"]
|
|
state_key = delta["state_key"]
|
|
room_id = delta["room_id"]
|
|
event_id = delta["event_id"]
|
|
prev_event_id = delta["prev_event_id"]
|
|
|
|
logger.debug("Handling: %r %r, %s", typ, state_key, event_id)
|
|
|
|
# Drop any event that isn't a membership join
|
|
if typ != EventTypes.Member:
|
|
continue
|
|
|
|
if event_id is None:
|
|
# state has been deleted, so this is not a join. We only care about
|
|
# joins.
|
|
continue
|
|
|
|
event = await self.store.get_event(event_id, allow_none=True)
|
|
if not event or event.content.get("membership") != Membership.JOIN:
|
|
# We only care about joins
|
|
continue
|
|
|
|
if prev_event_id:
|
|
prev_event = await self.store.get_event(prev_event_id, allow_none=True)
|
|
if (
|
|
prev_event
|
|
and prev_event.content.get("membership") == Membership.JOIN
|
|
):
|
|
# Ignore changes to join events.
|
|
continue
|
|
|
|
# Retrieve any user presence state updates that need to be sent as a result,
|
|
# and the destinations that need to receive it
|
|
destinations, user_presence_states = await self._on_user_joined_room(
|
|
room_id, state_key
|
|
)
|
|
|
|
# Insert the destinations and respective updates into our destinations dict
|
|
for destination in destinations:
|
|
presence_destinations.setdefault(destination, set()).update(
|
|
user_presence_states
|
|
)
|
|
|
|
# Since this is master we know that we have a federation sender or
|
|
# queue, and so this will be defined.
|
|
assert self._federation
|
|
|
|
# Send out user presence updates for each destination
|
|
for destination, user_state_set in presence_destinations.items():
|
|
self._federation.send_presence_to_destinations(
|
|
destinations=[destination], states=user_state_set
|
|
)
|
|
|
|
async def _on_user_joined_room(
|
|
self, room_id: str, user_id: str
|
|
) -> Tuple[List[str], List[UserPresenceState]]:
|
|
"""Called when we detect a user joining the room via the current state
|
|
delta stream. Returns the destinations that need to be updated and the
|
|
presence updates to send to them.
|
|
|
|
Args:
|
|
room_id: The ID of the room that the user has joined.
|
|
user_id: The ID of the user that has joined the room.
|
|
|
|
Returns:
|
|
A tuple of destinations and presence updates to send to them.
|
|
"""
|
|
if self.is_mine_id(user_id):
|
|
# If this is a local user then we need to send their presence
|
|
# out to hosts in the room (who don't already have it)
|
|
|
|
# TODO: We should be able to filter the hosts down to those that
|
|
# haven't previously seen the user
|
|
|
|
remote_hosts = await self.state.get_current_hosts_in_room(room_id)
|
|
|
|
# Filter out ourselves.
|
|
filtered_remote_hosts = [
|
|
host for host in remote_hosts if host != self.server_name
|
|
]
|
|
|
|
state = await self.current_state_for_user(user_id)
|
|
return filtered_remote_hosts, [state]
|
|
else:
|
|
# A remote user has joined the room, so we need to:
|
|
# 1. Check if this is a new server in the room
|
|
# 2. If so send any presence they don't already have for
|
|
# local users in the room.
|
|
|
|
# TODO: We should be able to filter the users down to those that
|
|
# the server hasn't previously seen
|
|
|
|
# TODO: Check that this is actually a new server joining the
|
|
# room.
|
|
|
|
remote_host = get_domain_from_id(user_id)
|
|
|
|
users = await self.state.get_current_users_in_room(room_id)
|
|
user_ids = list(filter(self.is_mine_id, users))
|
|
|
|
states_d = await self.current_state_for_users(user_ids)
|
|
|
|
# Filter out old presence, i.e. offline presence states where
|
|
# the user hasn't been active for a week. We can change this
|
|
# depending on what we want the UX to be, but at the least we
|
|
# should filter out offline presence where the state is just the
|
|
# default state.
|
|
now = self.clock.time_msec()
|
|
states = [
|
|
state
|
|
for state in states_d.values()
|
|
if state.state != PresenceState.OFFLINE
|
|
or now - state.last_active_ts < 7 * 24 * 60 * 60 * 1000
|
|
or state.status_msg is not None
|
|
]
|
|
|
|
return [remote_host], states
|
|
|
|
|
|
def should_notify(old_state, new_state):
|
|
"""Decides if a presence state change should be sent to interested parties."""
|
|
if old_state == new_state:
|
|
return False
|
|
|
|
if old_state.status_msg != new_state.status_msg:
|
|
notify_reason_counter.labels("status_msg_change").inc()
|
|
return True
|
|
|
|
if old_state.state != new_state.state:
|
|
notify_reason_counter.labels("state_change").inc()
|
|
state_transition_counter.labels(old_state.state, new_state.state).inc()
|
|
return True
|
|
|
|
if old_state.state == PresenceState.ONLINE:
|
|
if new_state.currently_active != old_state.currently_active:
|
|
notify_reason_counter.labels("current_active_change").inc()
|
|
return True
|
|
|
|
if (
|
|
new_state.last_active_ts - old_state.last_active_ts
|
|
> LAST_ACTIVE_GRANULARITY
|
|
):
|
|
# Only notify about last active bumps if we're not currently active
|
|
if not new_state.currently_active:
|
|
notify_reason_counter.labels("last_active_change_online").inc()
|
|
return True
|
|
|
|
elif new_state.last_active_ts - old_state.last_active_ts > LAST_ACTIVE_GRANULARITY:
|
|
# Always notify for a transition where last active gets bumped.
|
|
notify_reason_counter.labels("last_active_change_not_online").inc()
|
|
return True
|
|
|
|
return False
|
|
|
|
|
|
def format_user_presence_state(state, now, include_user_id=True):
|
|
"""Convert UserPresenceState to a format that can be sent down to clients
|
|
and to other servers.
|
|
|
|
The "user_id" is optional so that this function can be used to format presence
|
|
updates for client /sync responses and for federation /send requests.
|
|
"""
|
|
content = {"presence": state.state}
|
|
if include_user_id:
|
|
content["user_id"] = state.user_id
|
|
if state.last_active_ts:
|
|
content["last_active_ago"] = now - state.last_active_ts
|
|
if state.status_msg and state.state != PresenceState.OFFLINE:
|
|
content["status_msg"] = state.status_msg
|
|
if state.state == PresenceState.ONLINE:
|
|
content["currently_active"] = state.currently_active
|
|
|
|
return content
|
|
|
|
|
|
class PresenceEventSource:
|
|
def __init__(self, hs: "HomeServer"):
|
|
# We can't call get_presence_handler here because there's a cycle:
|
|
#
|
|
# Presence -> Notifier -> PresenceEventSource -> Presence
|
|
#
|
|
# Same with get_module_api, get_presence_router
|
|
#
|
|
# AuthHandler -> Notifier -> PresenceEventSource -> ModuleApi -> AuthHandler
|
|
self.get_presence_handler = hs.get_presence_handler
|
|
self.get_module_api = hs.get_module_api
|
|
self.get_presence_router = hs.get_presence_router
|
|
self.clock = hs.get_clock()
|
|
self.store = hs.get_datastore()
|
|
self.state = hs.get_state_handler()
|
|
|
|
@log_function
|
|
async def get_new_events(
|
|
self,
|
|
user,
|
|
from_key,
|
|
room_ids=None,
|
|
include_offline=True,
|
|
explicit_room_id=None,
|
|
**kwargs,
|
|
) -> Tuple[List[UserPresenceState], int]:
|
|
# The process for getting presence events are:
|
|
# 1. Get the rooms the user is in.
|
|
# 2. Get the list of user in the rooms.
|
|
# 3. Get the list of users that are in the user's presence list.
|
|
# 4. If there is a from_key set, cross reference the list of users
|
|
# with the `presence_stream_cache` to see which ones we actually
|
|
# need to check.
|
|
# 5. Load current state for the users.
|
|
#
|
|
# We don't try and limit the presence updates by the current token, as
|
|
# sending down the rare duplicate is not a concern.
|
|
|
|
user_id = user.to_string()
|
|
stream_change_cache = self.store.presence_stream_cache
|
|
|
|
with Measure(self.clock, "presence.get_new_events"):
|
|
if user_id in self.get_module_api()._send_full_presence_to_local_users:
|
|
# This user has been specified by a module to receive all current, online
|
|
# user presence. Removing from_key and setting include_offline to false
|
|
# will do effectively this.
|
|
from_key = None
|
|
include_offline = False
|
|
|
|
if from_key is not None:
|
|
from_key = int(from_key)
|
|
|
|
max_token = self.store.get_current_presence_token()
|
|
if from_key == max_token:
|
|
# This is necessary as due to the way stream ID generators work
|
|
# we may get updates that have a stream ID greater than the max
|
|
# token (e.g. max_token is N but stream generator may return
|
|
# results for N+2, due to N+1 not having finished being
|
|
# persisted yet).
|
|
#
|
|
# This is usually fine, as it just means that we may send down
|
|
# some presence updates multiple times. However, we need to be
|
|
# careful that the sync stream either actually does make some
|
|
# progress or doesn't return, otherwise clients will end up
|
|
# tight looping calling /sync due to it immediately returning
|
|
# the same token repeatedly.
|
|
#
|
|
# Hence this guard where we just return nothing so that the sync
|
|
# doesn't return. C.f. #5503.
|
|
return [], max_token
|
|
|
|
# Figure out which other users this user should receive updates for
|
|
users_interested_in = await self._get_interested_in(user, explicit_room_id)
|
|
|
|
# We have a set of users that we're interested in the presence of. We want to
|
|
# cross-reference that with the users that have actually changed their presence.
|
|
|
|
# Check whether this user should see all user updates
|
|
|
|
if users_interested_in == PresenceRouter.ALL_USERS:
|
|
# Provide presence state for all users
|
|
presence_updates = await self._filter_all_presence_updates_for_user(
|
|
user_id, include_offline, from_key
|
|
)
|
|
|
|
# Remove the user from the list of users to receive all presence
|
|
if user_id in self.get_module_api()._send_full_presence_to_local_users:
|
|
self.get_module_api()._send_full_presence_to_local_users.remove(
|
|
user_id
|
|
)
|
|
|
|
return presence_updates, max_token
|
|
|
|
# Make mypy happy. users_interested_in should now be a set
|
|
assert not isinstance(users_interested_in, str)
|
|
|
|
# The set of users that we're interested in and that have had a presence update.
|
|
# We'll actually pull the presence updates for these users at the end.
|
|
interested_and_updated_users = (
|
|
set()
|
|
) # type: Union[Set[str], FrozenSet[str]]
|
|
|
|
if from_key:
|
|
# First get all users that have had a presence update
|
|
updated_users = stream_change_cache.get_all_entities_changed(from_key)
|
|
|
|
# Cross-reference users we're interested in with those that have had updates.
|
|
# Use a slightly-optimised method for processing smaller sets of updates.
|
|
if updated_users is not None and len(updated_users) < 500:
|
|
# For small deltas, it's quicker to get all changes and then
|
|
# cross-reference with the users we're interested in
|
|
get_updates_counter.labels("stream").inc()
|
|
for other_user_id in updated_users:
|
|
if other_user_id in users_interested_in:
|
|
# mypy thinks this variable could be a FrozenSet as it's possibly set
|
|
# to one in the `get_entities_changed` call below, and `add()` is not
|
|
# method on a FrozenSet. That doesn't affect us here though, as
|
|
# `interested_and_updated_users` is clearly a set() above.
|
|
interested_and_updated_users.add(other_user_id) # type: ignore
|
|
else:
|
|
# Too many possible updates. Find all users we can see and check
|
|
# if any of them have changed.
|
|
get_updates_counter.labels("full").inc()
|
|
|
|
interested_and_updated_users = (
|
|
stream_change_cache.get_entities_changed(
|
|
users_interested_in, from_key
|
|
)
|
|
)
|
|
else:
|
|
# No from_key has been specified. Return the presence for all users
|
|
# this user is interested in
|
|
interested_and_updated_users = users_interested_in
|
|
|
|
# Retrieve the current presence state for each user
|
|
users_to_state = await self.get_presence_handler().current_state_for_users(
|
|
interested_and_updated_users
|
|
)
|
|
presence_updates = list(users_to_state.values())
|
|
|
|
# Remove the user from the list of users to receive all presence
|
|
if user_id in self.get_module_api()._send_full_presence_to_local_users:
|
|
self.get_module_api()._send_full_presence_to_local_users.remove(user_id)
|
|
|
|
if not include_offline:
|
|
# Filter out offline presence states
|
|
presence_updates = self._filter_offline_presence_state(presence_updates)
|
|
|
|
return presence_updates, max_token
|
|
|
|
async def _filter_all_presence_updates_for_user(
|
|
self,
|
|
user_id: str,
|
|
include_offline: bool,
|
|
from_key: Optional[int] = None,
|
|
) -> List[UserPresenceState]:
|
|
"""
|
|
Computes the presence updates a user should receive.
|
|
|
|
First pulls presence updates from the database. Then consults PresenceRouter
|
|
for whether any updates should be excluded by user ID.
|
|
|
|
Args:
|
|
user_id: The User ID of the user to compute presence updates for.
|
|
include_offline: Whether to include offline presence states from the results.
|
|
from_key: The minimum stream ID of updates to pull from the database
|
|
before filtering.
|
|
|
|
Returns:
|
|
A list of presence states for the given user to receive.
|
|
"""
|
|
if from_key:
|
|
# Only return updates since the last sync
|
|
updated_users = self.store.presence_stream_cache.get_all_entities_changed(
|
|
from_key
|
|
)
|
|
if not updated_users:
|
|
updated_users = []
|
|
|
|
# Get the actual presence update for each change
|
|
users_to_state = await self.get_presence_handler().current_state_for_users(
|
|
updated_users
|
|
)
|
|
presence_updates = list(users_to_state.values())
|
|
|
|
if not include_offline:
|
|
# Filter out offline states
|
|
presence_updates = self._filter_offline_presence_state(presence_updates)
|
|
else:
|
|
users_to_state = await self.store.get_presence_for_all_users(
|
|
include_offline=include_offline
|
|
)
|
|
|
|
presence_updates = list(users_to_state.values())
|
|
|
|
# TODO: This feels wildly inefficient, and it's unfortunate we need to ask the
|
|
# module for information on a number of users when we then only take the info
|
|
# for a single user
|
|
|
|
# Filter through the presence router
|
|
users_to_state_set = await self.get_presence_router().get_users_for_states(
|
|
presence_updates
|
|
)
|
|
|
|
# We only want the mapping for the syncing user
|
|
presence_updates = list(users_to_state_set[user_id])
|
|
|
|
# Return presence information for all users
|
|
return presence_updates
|
|
|
|
def _filter_offline_presence_state(
|
|
self, presence_updates: Iterable[UserPresenceState]
|
|
) -> List[UserPresenceState]:
|
|
"""Given an iterable containing user presence updates, return a list with any offline
|
|
presence states removed.
|
|
|
|
Args:
|
|
presence_updates: Presence states to filter
|
|
|
|
Returns:
|
|
A new list with any offline presence states removed.
|
|
"""
|
|
return [
|
|
update
|
|
for update in presence_updates
|
|
if update.state != PresenceState.OFFLINE
|
|
]
|
|
|
|
def get_current_key(self):
|
|
return self.store.get_current_presence_token()
|
|
|
|
@cached(num_args=2, cache_context=True)
|
|
async def _get_interested_in(
|
|
self,
|
|
user: UserID,
|
|
explicit_room_id: Optional[str] = None,
|
|
cache_context: Optional[_CacheContext] = None,
|
|
) -> Union[Set[str], str]:
|
|
"""Returns the set of users that the given user should see presence
|
|
updates for.
|
|
|
|
Args:
|
|
user: The user to retrieve presence updates for.
|
|
explicit_room_id: The users that are in the room will be returned.
|
|
|
|
Returns:
|
|
A set of user IDs to return presence updates for, or "ALL" to return all
|
|
known updates.
|
|
"""
|
|
user_id = user.to_string()
|
|
users_interested_in = set()
|
|
users_interested_in.add(user_id) # So that we receive our own presence
|
|
|
|
# cache_context isn't likely to ever be None due to the @cached decorator,
|
|
# but we can't have a non-optional argument after the optional argument
|
|
# explicit_room_id either. Assert cache_context is not None so we can use it
|
|
# without mypy complaining.
|
|
assert cache_context
|
|
|
|
# Check with the presence router whether we should poll additional users for
|
|
# their presence information
|
|
additional_users = await self.get_presence_router().get_interested_users(
|
|
user.to_string()
|
|
)
|
|
if additional_users == PresenceRouter.ALL_USERS:
|
|
# If the module requested that this user see the presence updates of *all*
|
|
# users, then simply return that instead of calculating what rooms this
|
|
# user shares
|
|
return PresenceRouter.ALL_USERS
|
|
|
|
# Add the additional users from the router
|
|
users_interested_in.update(additional_users)
|
|
|
|
# Find the users who share a room with this user
|
|
users_who_share_room = await self.store.get_users_who_share_room_with_user(
|
|
user_id, on_invalidate=cache_context.invalidate
|
|
)
|
|
users_interested_in.update(users_who_share_room)
|
|
|
|
if explicit_room_id:
|
|
user_ids = await self.store.get_users_in_room(
|
|
explicit_room_id, on_invalidate=cache_context.invalidate
|
|
)
|
|
users_interested_in.update(user_ids)
|
|
|
|
return users_interested_in
|
|
|
|
|
|
def handle_timeouts(user_states, is_mine_fn, syncing_user_ids, now):
|
|
"""Checks the presence of users that have timed out and updates as
|
|
appropriate.
|
|
|
|
Args:
|
|
user_states(list): List of UserPresenceState's to check.
|
|
is_mine_fn (fn): Function that returns if a user_id is ours
|
|
syncing_user_ids (set): Set of user_ids with active syncs.
|
|
now (int): Current time in ms.
|
|
|
|
Returns:
|
|
List of UserPresenceState updates
|
|
"""
|
|
changes = {} # Actual changes we need to notify people about
|
|
|
|
for state in user_states:
|
|
is_mine = is_mine_fn(state.user_id)
|
|
|
|
new_state = handle_timeout(state, is_mine, syncing_user_ids, now)
|
|
if new_state:
|
|
changes[state.user_id] = new_state
|
|
|
|
return list(changes.values())
|
|
|
|
|
|
def handle_timeout(state, is_mine, syncing_user_ids, now):
|
|
"""Checks the presence of the user to see if any of the timers have elapsed
|
|
|
|
Args:
|
|
state (UserPresenceState)
|
|
is_mine (bool): Whether the user is ours
|
|
syncing_user_ids (set): Set of user_ids with active syncs.
|
|
now (int): Current time in ms.
|
|
|
|
Returns:
|
|
A UserPresenceState update or None if no update.
|
|
"""
|
|
if state.state == PresenceState.OFFLINE:
|
|
# No timeouts are associated with offline states.
|
|
return None
|
|
|
|
changed = False
|
|
user_id = state.user_id
|
|
|
|
if is_mine:
|
|
if state.state == PresenceState.ONLINE:
|
|
if now - state.last_active_ts > IDLE_TIMER:
|
|
# Currently online, but last activity ages ago so auto
|
|
# idle
|
|
state = state.copy_and_replace(state=PresenceState.UNAVAILABLE)
|
|
changed = True
|
|
elif now - state.last_active_ts > LAST_ACTIVE_GRANULARITY:
|
|
# So that we send down a notification that we've
|
|
# stopped updating.
|
|
changed = True
|
|
|
|
if now - state.last_federation_update_ts > FEDERATION_PING_INTERVAL:
|
|
# Need to send ping to other servers to ensure they don't
|
|
# timeout and set us to offline
|
|
changed = True
|
|
|
|
# If there are have been no sync for a while (and none ongoing),
|
|
# set presence to offline
|
|
if user_id not in syncing_user_ids:
|
|
# If the user has done something recently but hasn't synced,
|
|
# don't set them as offline.
|
|
sync_or_active = max(state.last_user_sync_ts, state.last_active_ts)
|
|
if now - sync_or_active > SYNC_ONLINE_TIMEOUT:
|
|
state = state.copy_and_replace(
|
|
state=PresenceState.OFFLINE, status_msg=None
|
|
)
|
|
changed = True
|
|
else:
|
|
# We expect to be poked occasionally by the other side.
|
|
# This is to protect against forgetful/buggy servers, so that
|
|
# no one gets stuck online forever.
|
|
if now - state.last_federation_update_ts > FEDERATION_TIMEOUT:
|
|
# The other side seems to have disappeared.
|
|
state = state.copy_and_replace(state=PresenceState.OFFLINE, status_msg=None)
|
|
changed = True
|
|
|
|
return state if changed else None
|
|
|
|
|
|
def handle_update(prev_state, new_state, is_mine, wheel_timer, now):
|
|
"""Given a presence update:
|
|
1. Add any appropriate timers.
|
|
2. Check if we should notify anyone.
|
|
|
|
Args:
|
|
prev_state (UserPresenceState)
|
|
new_state (UserPresenceState)
|
|
is_mine (bool): Whether the user is ours
|
|
wheel_timer (WheelTimer)
|
|
now (int): Time now in ms
|
|
|
|
Returns:
|
|
3-tuple: `(new_state, persist_and_notify, federation_ping)` where:
|
|
- new_state: is the state to actually persist
|
|
- persist_and_notify (bool): whether to persist and notify people
|
|
- federation_ping (bool): whether we should send a ping over federation
|
|
"""
|
|
user_id = new_state.user_id
|
|
|
|
persist_and_notify = False
|
|
federation_ping = False
|
|
|
|
# If the users are ours then we want to set up a bunch of timers
|
|
# to time things out.
|
|
if is_mine:
|
|
if new_state.state == PresenceState.ONLINE:
|
|
# Idle timer
|
|
wheel_timer.insert(
|
|
now=now, obj=user_id, then=new_state.last_active_ts + IDLE_TIMER
|
|
)
|
|
|
|
active = now - new_state.last_active_ts < LAST_ACTIVE_GRANULARITY
|
|
new_state = new_state.copy_and_replace(currently_active=active)
|
|
|
|
if active:
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_active_ts + LAST_ACTIVE_GRANULARITY,
|
|
)
|
|
|
|
if new_state.state != PresenceState.OFFLINE:
|
|
# User has stopped syncing
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_user_sync_ts + SYNC_ONLINE_TIMEOUT,
|
|
)
|
|
|
|
last_federate = new_state.last_federation_update_ts
|
|
if now - last_federate > FEDERATION_PING_INTERVAL:
|
|
# Been a while since we've poked remote servers
|
|
new_state = new_state.copy_and_replace(last_federation_update_ts=now)
|
|
federation_ping = True
|
|
|
|
else:
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_federation_update_ts + FEDERATION_TIMEOUT,
|
|
)
|
|
|
|
# Check whether the change was something worth notifying about
|
|
if should_notify(prev_state, new_state):
|
|
new_state = new_state.copy_and_replace(last_federation_update_ts=now)
|
|
persist_and_notify = True
|
|
|
|
return new_state, persist_and_notify, federation_ping
|
|
|
|
|
|
async def get_interested_parties(
|
|
store: DataStore, presence_router: PresenceRouter, states: List[UserPresenceState]
|
|
) -> Tuple[Dict[str, List[UserPresenceState]], Dict[str, List[UserPresenceState]]]:
|
|
"""Given a list of states return which entities (rooms, users)
|
|
are interested in the given states.
|
|
|
|
Args:
|
|
store: The homeserver's data store.
|
|
presence_router: A module for augmenting the destinations for presence updates.
|
|
states: A list of incoming user presence updates.
|
|
|
|
Returns:
|
|
A 2-tuple of `(room_ids_to_states, users_to_states)`,
|
|
with each item being a dict of `entity_name` -> `[UserPresenceState]`
|
|
"""
|
|
room_ids_to_states = {} # type: Dict[str, List[UserPresenceState]]
|
|
users_to_states = {} # type: Dict[str, List[UserPresenceState]]
|
|
for state in states:
|
|
room_ids = await store.get_rooms_for_user(state.user_id)
|
|
for room_id in room_ids:
|
|
room_ids_to_states.setdefault(room_id, []).append(state)
|
|
|
|
# Always notify self
|
|
users_to_states.setdefault(state.user_id, []).append(state)
|
|
|
|
# Ask a presence routing module for any additional parties if one
|
|
# is loaded.
|
|
router_users_to_states = await presence_router.get_users_for_states(states)
|
|
|
|
# Update the dictionaries with additional destinations and state to send
|
|
for user_id, user_states in router_users_to_states.items():
|
|
users_to_states.setdefault(user_id, []).extend(user_states)
|
|
|
|
return room_ids_to_states, users_to_states
|
|
|
|
|
|
async def get_interested_remotes(
|
|
store: DataStore,
|
|
presence_router: PresenceRouter,
|
|
states: List[UserPresenceState],
|
|
state_handler: StateHandler,
|
|
) -> List[Tuple[Collection[str], List[UserPresenceState]]]:
|
|
"""Given a list of presence states figure out which remote servers
|
|
should be sent which.
|
|
|
|
All the presence states should be for local users only.
|
|
|
|
Args:
|
|
store: The homeserver's data store.
|
|
presence_router: A module for augmenting the destinations for presence updates.
|
|
states: A list of incoming user presence updates.
|
|
state_handler:
|
|
|
|
Returns:
|
|
A list of 2-tuples of destinations and states, where for
|
|
each tuple the list of UserPresenceState should be sent to each
|
|
destination
|
|
"""
|
|
hosts_and_states = [] # type: List[Tuple[Collection[str], List[UserPresenceState]]]
|
|
|
|
# First we look up the rooms each user is in (as well as any explicit
|
|
# subscriptions), then for each distinct room we look up the remote
|
|
# hosts in those rooms.
|
|
room_ids_to_states, users_to_states = await get_interested_parties(
|
|
store, presence_router, states
|
|
)
|
|
|
|
for room_id, states in room_ids_to_states.items():
|
|
hosts = await state_handler.get_current_hosts_in_room(room_id)
|
|
hosts_and_states.append((hosts, states))
|
|
|
|
for user_id, states in users_to_states.items():
|
|
host = get_domain_from_id(user_id)
|
|
hosts_and_states.append(([host], states))
|
|
|
|
return hosts_and_states
|