mirror of
https://git.anonymousland.org/anonymousland/synapse.git
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bc80b3f454
* Add helpers for getting prev and auth events This is in preparation for allowing the event format to change between room versions.
672 lines
24 KiB
Python
672 lines
24 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import datetime
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import logging
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from six import itervalues
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from prometheus_client import Counter
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from twisted.internet import defer
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import synapse.metrics
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from synapse.api.errors import FederationDeniedError, HttpResponseException
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from synapse.handlers.presence import format_user_presence_state, get_interested_remotes
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from synapse.metrics import (
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LaterGauge,
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event_processing_loop_counter,
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event_processing_loop_room_count,
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events_processed_counter,
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sent_edus_counter,
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sent_transactions_counter,
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)
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.util import logcontext
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from synapse.util.metrics import measure_func
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from synapse.util.retryutils import NotRetryingDestination, get_retry_limiter
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from .persistence import TransactionActions
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from .units import Edu, Transaction
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logger = logging.getLogger(__name__)
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sent_pdus_destination_dist_count = Counter(
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"synapse_federation_client_sent_pdu_destinations:count", ""
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)
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sent_pdus_destination_dist_total = Counter(
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"synapse_federation_client_sent_pdu_destinations:total", ""
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)
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class TransactionQueue(object):
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"""This class makes sure we only have one transaction in flight at
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a time for a given destination.
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It batches pending PDUs into single transactions.
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"""
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def __init__(self, hs):
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self.hs = hs
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self.server_name = hs.hostname
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self.store = hs.get_datastore()
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self.state = hs.get_state_handler()
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self.transaction_actions = TransactionActions(self.store)
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self.transport_layer = hs.get_federation_transport_client()
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self.clock = hs.get_clock()
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self.is_mine_id = hs.is_mine_id
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# Is a mapping from destinations -> deferreds. Used to keep track
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# of which destinations have transactions in flight and when they are
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# done
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self.pending_transactions = {}
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LaterGauge(
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"synapse_federation_transaction_queue_pending_destinations",
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"",
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[],
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lambda: len(self.pending_transactions),
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)
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# Is a mapping from destination -> list of
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# tuple(pending pdus, deferred, order)
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self.pending_pdus_by_dest = pdus = {}
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# destination -> list of tuple(edu, deferred)
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self.pending_edus_by_dest = edus = {}
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# Map of user_id -> UserPresenceState for all the pending presence
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# to be sent out by user_id. Entries here get processed and put in
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# pending_presence_by_dest
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self.pending_presence = {}
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# Map of destination -> user_id -> UserPresenceState of pending presence
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# to be sent to each destinations
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self.pending_presence_by_dest = presence = {}
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# Pending EDUs by their "key". Keyed EDUs are EDUs that get clobbered
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# based on their key (e.g. typing events by room_id)
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# Map of destination -> (edu_type, key) -> Edu
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self.pending_edus_keyed_by_dest = edus_keyed = {}
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LaterGauge(
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"synapse_federation_transaction_queue_pending_pdus",
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"",
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[],
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lambda: sum(map(len, pdus.values())),
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)
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LaterGauge(
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"synapse_federation_transaction_queue_pending_edus",
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"",
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[],
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lambda: (
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sum(map(len, edus.values()))
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+ sum(map(len, presence.values()))
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+ sum(map(len, edus_keyed.values()))
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),
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)
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# destination -> stream_id of last successfully sent to-device message.
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# NB: may be a long or an int.
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self.last_device_stream_id_by_dest = {}
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# destination -> stream_id of last successfully sent device list
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# update.
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self.last_device_list_stream_id_by_dest = {}
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# HACK to get unique tx id
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self._next_txn_id = int(self.clock.time_msec())
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self._order = 1
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self._is_processing = False
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self._last_poked_id = -1
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self._processing_pending_presence = False
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def notify_new_events(self, current_id):
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"""This gets called when we have some new events we might want to
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send out to other servers.
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"""
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self._last_poked_id = max(current_id, self._last_poked_id)
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if self._is_processing:
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return
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# fire off a processing loop in the background
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run_as_background_process(
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"process_event_queue_for_federation",
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self._process_event_queue_loop,
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)
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@defer.inlineCallbacks
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def _process_event_queue_loop(self):
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try:
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self._is_processing = True
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while True:
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last_token = yield self.store.get_federation_out_pos("events")
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next_token, events = yield self.store.get_all_new_events_stream(
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last_token, self._last_poked_id, limit=100,
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)
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logger.debug("Handling %s -> %s", last_token, next_token)
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if not events and next_token >= self._last_poked_id:
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break
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@defer.inlineCallbacks
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def handle_event(event):
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# Only send events for this server.
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send_on_behalf_of = event.internal_metadata.get_send_on_behalf_of()
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is_mine = self.is_mine_id(event.event_id)
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if not is_mine and send_on_behalf_of is None:
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return
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try:
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# Get the state from before the event.
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# We need to make sure that this is the state from before
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# the event and not from after it.
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# Otherwise if the last member on a server in a room is
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# banned then it won't receive the event because it won't
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# be in the room after the ban.
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destinations = yield self.state.get_current_hosts_in_room(
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event.room_id, latest_event_ids=event.prev_event_ids(),
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)
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except Exception:
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logger.exception(
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"Failed to calculate hosts in room for event: %s",
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event.event_id,
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)
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return
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destinations = set(destinations)
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if send_on_behalf_of is not None:
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# If we are sending the event on behalf of another server
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# then it already has the event and there is no reason to
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# send the event to it.
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destinations.discard(send_on_behalf_of)
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logger.debug("Sending %s to %r", event, destinations)
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self._send_pdu(event, destinations)
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@defer.inlineCallbacks
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def handle_room_events(events):
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for event in events:
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yield handle_event(event)
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events_by_room = {}
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for event in events:
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events_by_room.setdefault(event.room_id, []).append(event)
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yield logcontext.make_deferred_yieldable(defer.gatherResults(
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[
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logcontext.run_in_background(handle_room_events, evs)
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for evs in itervalues(events_by_room)
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],
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consumeErrors=True
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))
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yield self.store.update_federation_out_pos(
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"events", next_token
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)
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if events:
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now = self.clock.time_msec()
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ts = yield self.store.get_received_ts(events[-1].event_id)
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synapse.metrics.event_processing_lag.labels(
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"federation_sender").set(now - ts)
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synapse.metrics.event_processing_last_ts.labels(
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"federation_sender").set(ts)
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events_processed_counter.inc(len(events))
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event_processing_loop_room_count.labels(
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"federation_sender"
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).inc(len(events_by_room))
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event_processing_loop_counter.labels("federation_sender").inc()
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synapse.metrics.event_processing_positions.labels(
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"federation_sender").set(next_token)
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finally:
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self._is_processing = False
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def _send_pdu(self, pdu, destinations):
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# We loop through all destinations to see whether we already have
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# a transaction in progress. If we do, stick it in the pending_pdus
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# table and we'll get back to it later.
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order = self._order
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self._order += 1
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destinations = set(destinations)
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destinations.discard(self.server_name)
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logger.debug("Sending to: %s", str(destinations))
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if not destinations:
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return
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sent_pdus_destination_dist_total.inc(len(destinations))
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sent_pdus_destination_dist_count.inc()
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for destination in destinations:
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self.pending_pdus_by_dest.setdefault(destination, []).append(
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(pdu, order)
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)
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self._attempt_new_transaction(destination)
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@logcontext.preserve_fn # the caller should not yield on this
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@defer.inlineCallbacks
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def send_presence(self, states):
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"""Send the new presence states to the appropriate destinations.
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This actually queues up the presence states ready for sending and
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triggers a background task to process them and send out the transactions.
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Args:
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states (list(UserPresenceState))
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"""
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if not self.hs.config.use_presence:
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# No-op if presence is disabled.
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return
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# First we queue up the new presence by user ID, so multiple presence
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# updates in quick successtion are correctly handled
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# We only want to send presence for our own users, so lets always just
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# filter here just in case.
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self.pending_presence.update({
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state.user_id: state for state in states
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if self.is_mine_id(state.user_id)
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})
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# We then handle the new pending presence in batches, first figuring
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# out the destinations we need to send each state to and then poking it
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# to attempt a new transaction. We linearize this so that we don't
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# accidentally mess up the ordering and send multiple presence updates
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# in the wrong order
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if self._processing_pending_presence:
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return
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self._processing_pending_presence = True
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try:
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while True:
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states_map = self.pending_presence
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self.pending_presence = {}
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if not states_map:
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break
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yield self._process_presence_inner(list(states_map.values()))
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except Exception:
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logger.exception("Error sending presence states to servers")
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finally:
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self._processing_pending_presence = False
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@measure_func("txnqueue._process_presence")
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@defer.inlineCallbacks
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def _process_presence_inner(self, states):
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"""Given a list of states populate self.pending_presence_by_dest and
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poke to send a new transaction to each destination
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Args:
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states (list(UserPresenceState))
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"""
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hosts_and_states = yield get_interested_remotes(self.store, states, self.state)
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for destinations, states in hosts_and_states:
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for destination in destinations:
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if destination == self.server_name:
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continue
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self.pending_presence_by_dest.setdefault(
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destination, {}
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).update({
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state.user_id: state for state in states
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})
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self._attempt_new_transaction(destination)
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def send_edu(self, destination, edu_type, content, key=None):
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edu = Edu(
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origin=self.server_name,
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destination=destination,
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edu_type=edu_type,
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content=content,
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)
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if destination == self.server_name:
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logger.info("Not sending EDU to ourselves")
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return
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sent_edus_counter.inc()
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if key:
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self.pending_edus_keyed_by_dest.setdefault(
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destination, {}
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)[(edu.edu_type, key)] = edu
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else:
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self.pending_edus_by_dest.setdefault(destination, []).append(edu)
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self._attempt_new_transaction(destination)
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def send_device_messages(self, destination):
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if destination == self.server_name:
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logger.info("Not sending device update to ourselves")
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return
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self._attempt_new_transaction(destination)
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def get_current_token(self):
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return 0
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def _attempt_new_transaction(self, destination):
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"""Try to start a new transaction to this destination
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If there is already a transaction in progress to this destination,
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returns immediately. Otherwise kicks off the process of sending a
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transaction in the background.
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Args:
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destination (str):
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Returns:
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None
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"""
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# list of (pending_pdu, deferred, order)
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if destination in self.pending_transactions:
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# XXX: pending_transactions can get stuck on by a never-ending
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# request at which point pending_pdus_by_dest just keeps growing.
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# we need application-layer timeouts of some flavour of these
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# requests
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logger.debug(
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"TX [%s] Transaction already in progress",
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destination
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)
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return
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logger.debug("TX [%s] Starting transaction loop", destination)
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run_as_background_process(
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"federation_transaction_transmission_loop",
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self._transaction_transmission_loop,
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destination,
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)
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@defer.inlineCallbacks
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def _transaction_transmission_loop(self, destination):
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pending_pdus = []
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try:
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self.pending_transactions[destination] = 1
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# This will throw if we wouldn't retry. We do this here so we fail
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# quickly, but we will later check this again in the http client,
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# hence why we throw the result away.
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yield get_retry_limiter(destination, self.clock, self.store)
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pending_pdus = []
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while True:
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device_message_edus, device_stream_id, dev_list_id = (
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yield self._get_new_device_messages(destination)
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)
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# BEGIN CRITICAL SECTION
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#
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# In order to avoid a race condition, we need to make sure that
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# the following code (from popping the queues up to the point
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# where we decide if we actually have any pending messages) is
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# atomic - otherwise new PDUs or EDUs might arrive in the
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# meantime, but not get sent because we hold the
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# pending_transactions flag.
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pending_pdus = self.pending_pdus_by_dest.pop(destination, [])
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# We can only include at most 50 PDUs per transactions
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pending_pdus, leftover_pdus = pending_pdus[:50], pending_pdus[50:]
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if leftover_pdus:
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self.pending_pdus_by_dest[destination] = leftover_pdus
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pending_edus = self.pending_edus_by_dest.pop(destination, [])
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# We can only include at most 100 EDUs per transactions
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pending_edus, leftover_edus = pending_edus[:100], pending_edus[100:]
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if leftover_edus:
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self.pending_edus_by_dest[destination] = leftover_edus
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pending_presence = self.pending_presence_by_dest.pop(destination, {})
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pending_edus.extend(
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self.pending_edus_keyed_by_dest.pop(destination, {}).values()
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)
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pending_edus.extend(device_message_edus)
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if pending_presence:
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pending_edus.append(
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Edu(
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origin=self.server_name,
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destination=destination,
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edu_type="m.presence",
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content={
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"push": [
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format_user_presence_state(
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presence, self.clock.time_msec()
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)
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for presence in pending_presence.values()
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]
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},
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)
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)
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if pending_pdus:
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logger.debug("TX [%s] len(pending_pdus_by_dest[dest]) = %d",
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destination, len(pending_pdus))
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if not pending_pdus and not pending_edus:
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logger.debug("TX [%s] Nothing to send", destination)
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self.last_device_stream_id_by_dest[destination] = (
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device_stream_id
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)
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return
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# END CRITICAL SECTION
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success = yield self._send_new_transaction(
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destination, pending_pdus, pending_edus,
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)
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if success:
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sent_transactions_counter.inc()
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# Remove the acknowledged device messages from the database
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# Only bother if we actually sent some device messages
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if device_message_edus:
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yield self.store.delete_device_msgs_for_remote(
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destination, device_stream_id
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)
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logger.info("Marking as sent %r %r", destination, dev_list_id)
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yield self.store.mark_as_sent_devices_by_remote(
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destination, dev_list_id
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)
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self.last_device_stream_id_by_dest[destination] = device_stream_id
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self.last_device_list_stream_id_by_dest[destination] = dev_list_id
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else:
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break
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except NotRetryingDestination as e:
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logger.debug(
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"TX [%s] not ready for retry yet (next retry at %s) - "
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"dropping transaction for now",
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destination,
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datetime.datetime.fromtimestamp(
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(e.retry_last_ts + e.retry_interval) / 1000.0
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),
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)
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except FederationDeniedError as e:
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logger.info(e)
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except Exception as e:
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logger.warn(
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"TX [%s] Failed to send transaction: %s",
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destination,
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e,
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)
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for p, _ in pending_pdus:
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logger.info("Failed to send event %s to %s", p.event_id,
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destination)
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finally:
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# We want to be *very* sure we delete this after we stop processing
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self.pending_transactions.pop(destination, None)
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|
|
@defer.inlineCallbacks
|
|
def _get_new_device_messages(self, destination):
|
|
last_device_stream_id = self.last_device_stream_id_by_dest.get(destination, 0)
|
|
to_device_stream_id = self.store.get_to_device_stream_token()
|
|
contents, stream_id = yield self.store.get_new_device_msgs_for_remote(
|
|
destination, last_device_stream_id, to_device_stream_id
|
|
)
|
|
edus = [
|
|
Edu(
|
|
origin=self.server_name,
|
|
destination=destination,
|
|
edu_type="m.direct_to_device",
|
|
content=content,
|
|
)
|
|
for content in contents
|
|
]
|
|
|
|
last_device_list = self.last_device_list_stream_id_by_dest.get(destination, 0)
|
|
now_stream_id, results = yield self.store.get_devices_by_remote(
|
|
destination, last_device_list
|
|
)
|
|
edus.extend(
|
|
Edu(
|
|
origin=self.server_name,
|
|
destination=destination,
|
|
edu_type="m.device_list_update",
|
|
content=content,
|
|
)
|
|
for content in results
|
|
)
|
|
defer.returnValue((edus, stream_id, now_stream_id))
|
|
|
|
@measure_func("_send_new_transaction")
|
|
@defer.inlineCallbacks
|
|
def _send_new_transaction(self, destination, pending_pdus, pending_edus):
|
|
|
|
# Sort based on the order field
|
|
pending_pdus.sort(key=lambda t: t[1])
|
|
pdus = [x[0] for x in pending_pdus]
|
|
edus = pending_edus
|
|
|
|
success = True
|
|
|
|
logger.debug("TX [%s] _attempt_new_transaction", destination)
|
|
|
|
txn_id = str(self._next_txn_id)
|
|
|
|
logger.debug(
|
|
"TX [%s] {%s} Attempting new transaction"
|
|
" (pdus: %d, edus: %d)",
|
|
destination, txn_id,
|
|
len(pdus),
|
|
len(edus),
|
|
)
|
|
|
|
logger.debug("TX [%s] Persisting transaction...", destination)
|
|
|
|
transaction = Transaction.create_new(
|
|
origin_server_ts=int(self.clock.time_msec()),
|
|
transaction_id=txn_id,
|
|
origin=self.server_name,
|
|
destination=destination,
|
|
pdus=pdus,
|
|
edus=edus,
|
|
)
|
|
|
|
self._next_txn_id += 1
|
|
|
|
yield self.transaction_actions.prepare_to_send(transaction)
|
|
|
|
logger.debug("TX [%s] Persisted transaction", destination)
|
|
logger.info(
|
|
"TX [%s] {%s} Sending transaction [%s],"
|
|
" (PDUs: %d, EDUs: %d)",
|
|
destination, txn_id,
|
|
transaction.transaction_id,
|
|
len(pdus),
|
|
len(edus),
|
|
)
|
|
|
|
# Actually send the transaction
|
|
|
|
# FIXME (erikj): This is a bit of a hack to make the Pdu age
|
|
# keys work
|
|
def json_data_cb():
|
|
data = transaction.get_dict()
|
|
now = int(self.clock.time_msec())
|
|
if "pdus" in data:
|
|
for p in data["pdus"]:
|
|
if "age_ts" in p:
|
|
unsigned = p.setdefault("unsigned", {})
|
|
unsigned["age"] = now - int(p["age_ts"])
|
|
del p["age_ts"]
|
|
return data
|
|
|
|
try:
|
|
response = yield self.transport_layer.send_transaction(
|
|
transaction, json_data_cb
|
|
)
|
|
code = 200
|
|
except HttpResponseException as e:
|
|
code = e.code
|
|
response = e.response
|
|
|
|
if e.code in (401, 404, 429) or 500 <= e.code:
|
|
logger.info(
|
|
"TX [%s] {%s} got %d response",
|
|
destination, txn_id, code
|
|
)
|
|
raise e
|
|
|
|
logger.info(
|
|
"TX [%s] {%s} got %d response",
|
|
destination, txn_id, code
|
|
)
|
|
|
|
yield self.transaction_actions.delivered(
|
|
transaction, code, response
|
|
)
|
|
|
|
logger.debug("TX [%s] {%s} Marked as delivered", destination, txn_id)
|
|
|
|
if code == 200:
|
|
for e_id, r in response.get("pdus", {}).items():
|
|
if "error" in r:
|
|
logger.warn(
|
|
"TX [%s] {%s} Remote returned error for %s: %s",
|
|
destination, txn_id, e_id, r,
|
|
)
|
|
else:
|
|
for p in pdus:
|
|
logger.warn(
|
|
"TX [%s] {%s} Failed to send event %s",
|
|
destination, txn_id, p.event_id,
|
|
)
|
|
success = False
|
|
|
|
defer.returnValue(success)
|