diff options
Diffstat (limited to 'synapse/replication')
| -rw-r--r-- | synapse/replication/tcp/client.py | 231 |
1 files changed, 224 insertions, 7 deletions
diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py index ced69ee904..ce5d651cb8 100644 --- a/synapse/replication/tcp/client.py +++ b/synapse/replication/tcp/client.py @@ -14,22 +14,36 @@ """A replication client for use by synapse workers. """ import logging -from typing import TYPE_CHECKING, Dict, List, Tuple +from typing import TYPE_CHECKING, Dict, List, Optional, Set, Tuple from twisted.internet.defer import Deferred from twisted.internet.protocol import ReconnectingClientFactory from synapse.api.constants import EventTypes +from synapse.federation import send_queue +from synapse.federation.sender import FederationSender from synapse.logging.context import PreserveLoggingContext, make_deferred_yieldable +from synapse.metrics.background_process_metrics import run_as_background_process from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol -from synapse.replication.tcp.streams import TypingStream +from synapse.replication.tcp.streams import ( + AccountDataStream, + DeviceListsStream, + GroupServerStream, + PresenceStream, + PushersStream, + PushRulesStream, + ReceiptsStream, + TagAccountDataStream, + ToDeviceStream, + TypingStream, +) from synapse.replication.tcp.streams.events import ( EventsStream, EventsStreamEventRow, EventsStreamRow, ) -from synapse.types import PersistedEventPosition, UserID -from synapse.util.async_helpers import timeout_deferred +from synapse.types import PersistedEventPosition, ReadReceipt, UserID +from synapse.util.async_helpers import Linearizer, timeout_deferred from synapse.util.metrics import Measure if TYPE_CHECKING: @@ -105,6 +119,14 @@ class ReplicationDataHandler: self._instance_name = hs.get_instance_name() self._typing_handler = hs.get_typing_handler() + self._notify_pushers = hs.config.start_pushers + self._pusher_pool = hs.get_pusherpool() + self._presence_handler = hs.get_presence_handler() + + self.send_handler = None # type: Optional[FederationSenderHandler] + if hs.should_send_federation(): + self.send_handler = FederationSenderHandler(hs) + # Map from stream to list of deferreds waiting for the stream to # arrive at a particular position. The lists are sorted by stream position. self._streams_to_waiters = {} # type: Dict[str, List[Tuple[int, Deferred]]] @@ -125,13 +147,53 @@ class ReplicationDataHandler: """ self.store.process_replication_rows(stream_name, instance_name, token, rows) + if self.send_handler: + await self.send_handler.process_replication_rows(stream_name, token, rows) + if stream_name == TypingStream.NAME: self._typing_handler.process_replication_rows(token, rows) self.notifier.on_new_event( "typing_key", token, rooms=[row.room_id for row in rows] ) - - if stream_name == EventsStream.NAME: + elif stream_name == PushRulesStream.NAME: + self.notifier.on_new_event( + "push_rules_key", token, users=[row.user_id for row in rows] + ) + elif stream_name in (AccountDataStream.NAME, TagAccountDataStream.NAME): + self.notifier.on_new_event( + "account_data_key", token, users=[row.user_id for row in rows] + ) + elif stream_name == ReceiptsStream.NAME: + self.notifier.on_new_event( + "receipt_key", token, rooms=[row.room_id for row in rows] + ) + await self._pusher_pool.on_new_receipts( + token, token, {row.room_id for row in rows} + ) + elif stream_name == ToDeviceStream.NAME: + entities = [row.entity for row in rows if row.entity.startswith("@")] + if entities: + self.notifier.on_new_event("to_device_key", token, users=entities) + elif stream_name == DeviceListsStream.NAME: + all_room_ids = set() # type: Set[str] + for row in rows: + if row.entity.startswith("@"): + room_ids = await self.store.get_rooms_for_user(row.entity) + all_room_ids.update(room_ids) + self.notifier.on_new_event("device_list_key", token, rooms=all_room_ids) + elif stream_name == GroupServerStream.NAME: + self.notifier.on_new_event( + "groups_key", token, users=[row.user_id for row in rows] + ) + elif stream_name == PushersStream.NAME: + for row in rows: + if row.deleted: + self.stop_pusher(row.user_id, row.app_id, row.pushkey) + else: + await self.start_pusher(row.user_id, row.app_id, row.pushkey) + elif stream_name == PresenceStream.NAME: + await self._presence_handler.process_replication_rows(token, rows) + elif stream_name == EventsStream.NAME: # We shouldn't get multiple rows per token for events stream, so # we don't need to optimise this for multiple rows. for row in rows: @@ -190,7 +252,7 @@ class ReplicationDataHandler: waiting_list[:] = waiting_list[index_of_first_deferred_not_called:] async def on_position(self, stream_name: str, instance_name: str, token: int): - self.store.process_replication_rows(stream_name, instance_name, token, []) + await self.on_rdata(stream_name, instance_name, token, []) # We poke the generic "replication" notifier to wake anything up that # may be streaming. @@ -199,6 +261,11 @@ class ReplicationDataHandler: def on_remote_server_up(self, server: str): """Called when get a new REMOTE_SERVER_UP command.""" + # Let's wake up the transaction queue for the server in case we have + # pending stuff to send to it. + if self.send_handler: + self.send_handler.wake_destination(server) + async def wait_for_stream_position( self, instance_name: str, stream_name: str, position: int ): @@ -235,3 +302,153 @@ class ReplicationDataHandler: logger.info( "Finished waiting for repl stream %r to reach %s", stream_name, position ) + + def stop_pusher(self, user_id, app_id, pushkey): + if not self._notify_pushers: + return + + key = "%s:%s" % (app_id, pushkey) + pushers_for_user = self._pusher_pool.pushers.get(user_id, {}) + pusher = pushers_for_user.pop(key, None) + if pusher is None: + return + logger.info("Stopping pusher %r / %r", user_id, key) + pusher.on_stop() + + async def start_pusher(self, user_id, app_id, pushkey): + if not self._notify_pushers: + return + + key = "%s:%s" % (app_id, pushkey) + logger.info("Starting pusher %r / %r", user_id, key) + return await self._pusher_pool.start_pusher_by_id(app_id, pushkey, user_id) + + +class FederationSenderHandler: + """Processes the fedration replication stream + + This class is only instantiate on the worker responsible for sending outbound + federation transactions. It receives rows from the replication stream and forwards + the appropriate entries to the FederationSender class. + """ + + def __init__(self, hs: "HomeServer"): + assert hs.should_send_federation() + + self.store = hs.get_datastore() + self._is_mine_id = hs.is_mine_id + self._hs = hs + + # We need to make a temporary value to ensure that mypy picks up the + # right type. We know we should have a federation sender instance since + # `should_send_federation` is True. + sender = hs.get_federation_sender() + assert isinstance(sender, FederationSender) + self.federation_sender = sender + + # Stores the latest position in the federation stream we've gotten up + # to. This is always set before we use it. + self.federation_position = None # type: Optional[int] + + self._fed_position_linearizer = Linearizer(name="_fed_position_linearizer") + + def wake_destination(self, server: str): + self.federation_sender.wake_destination(server) + + async def process_replication_rows(self, stream_name, token, rows): + # The federation stream contains things that we want to send out, e.g. + # presence, typing, etc. + if stream_name == "federation": + send_queue.process_rows_for_federation(self.federation_sender, rows) + await self.update_token(token) + + # ... and when new receipts happen + elif stream_name == ReceiptsStream.NAME: + await self._on_new_receipts(rows) + + # ... as well as device updates and messages + elif stream_name == DeviceListsStream.NAME: + # The entities are either user IDs (starting with '@') whose devices + # have changed, or remote servers that we need to tell about + # changes. + hosts = {row.entity for row in rows if not row.entity.startswith("@")} + for host in hosts: + self.federation_sender.send_device_messages(host) + + elif stream_name == ToDeviceStream.NAME: + # The to_device stream includes stuff to be pushed to both local + # clients and remote servers, so we ignore entities that start with + # '@' (since they'll be local users rather than destinations). + hosts = {row.entity for row in rows if not row.entity.startswith("@")} + for host in hosts: + self.federation_sender.send_device_messages(host) + + async def _on_new_receipts(self, rows): + """ + Args: + rows (Iterable[synapse.replication.tcp.streams.ReceiptsStream.ReceiptsStreamRow]): + new receipts to be processed + """ + for receipt in rows: + # we only want to send on receipts for our own users + if not self._is_mine_id(receipt.user_id): + continue + receipt_info = ReadReceipt( + receipt.room_id, + receipt.receipt_type, + receipt.user_id, + [receipt.event_id], + receipt.data, + ) + await self.federation_sender.send_read_receipt(receipt_info) + + async def update_token(self, token): + """Update the record of where we have processed to in the federation stream. + + Called after we have processed a an update received over replication. Sends + a FEDERATION_ACK back to the master, and stores the token that we have processed + in `federation_stream_position` so that we can restart where we left off. + """ + self.federation_position = token + + # We save and send the ACK to master asynchronously, so we don't block + # processing on persistence. We don't need to do this operation for + # every single RDATA we receive, we just need to do it periodically. + + if self._fed_position_linearizer.is_queued(None): + # There is already a task queued up to save and send the token, so + # no need to queue up another task. + return + + run_as_background_process("_save_and_send_ack", self._save_and_send_ack) + + async def _save_and_send_ack(self): + """Save the current federation position in the database and send an ACK + to master with where we're up to. + """ + # We should only be calling this once we've got a token. + assert self.federation_position is not None + + try: + # We linearize here to ensure we don't have races updating the token + # + # XXX this appears to be redundant, since the ReplicationCommandHandler + # has a linearizer which ensures that we only process one line of + # replication data at a time. Should we remove it, or is it doing useful + # service for robustness? Or could we replace it with an assertion that + # we're not being re-entered? + + with (await self._fed_position_linearizer.queue(None)): + # We persist and ack the same position, so we take a copy of it + # here as otherwise it can get modified from underneath us. + current_position = self.federation_position + + await self.store.update_federation_out_pos( + "federation", current_position + ) + + # We ACK this token over replication so that the master can drop + # its in memory queues + self._hs.get_tcp_replication().send_federation_ack(current_position) + except Exception: + logger.exception("Error updating federation stream position") |