mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-27 03:09:25 -05:00
9255a6cb17
There were a bunch of places where we fire off a process to happen in the background, but don't have any exception handling on it - instead relying on the unhandled error being logged when the relevent deferred gets garbage-collected. This is unsatisfactory for a number of reasons: - logging on garbage collection is best-effort and may happen some time after the error, if at all - it can be hard to figure out where the error actually happened. - it is logged as a scary CRITICAL error which (a) I always forget to grep for and (b) it's not really CRITICAL if a background process we don't care about fails. So this is an attempt to add exception handling to everything we fire off into the background.
233 lines
7.8 KiB
Python
233 lines
7.8 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 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 logging
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import sys
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import synapse
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from synapse import events
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from synapse.app import _base
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from synapse.config._base import ConfigError
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from synapse.config.homeserver import HomeServerConfig
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from synapse.config.logger import setup_logging
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from synapse.http.site import SynapseSite
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from synapse.metrics.resource import METRICS_PREFIX, MetricsResource
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from synapse.replication.slave.storage.account_data import SlavedAccountDataStore
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from synapse.replication.slave.storage.events import SlavedEventStore
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from synapse.replication.slave.storage.pushers import SlavedPusherStore
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from synapse.replication.slave.storage.receipts import SlavedReceiptsStore
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from synapse.replication.tcp.client import ReplicationClientHandler
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from synapse.server import HomeServer
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from synapse.storage import DataStore
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from synapse.storage.engines import create_engine
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from synapse.util.httpresourcetree import create_resource_tree
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from synapse.util.logcontext import LoggingContext, preserve_fn
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from synapse.util.manhole import manhole
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from synapse.util.versionstring import get_version_string
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from twisted.internet import defer, reactor
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from twisted.web.resource import NoResource
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logger = logging.getLogger("synapse.app.pusher")
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class PusherSlaveStore(
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SlavedEventStore, SlavedPusherStore, SlavedReceiptsStore,
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SlavedAccountDataStore
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):
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update_pusher_last_stream_ordering_and_success = (
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DataStore.update_pusher_last_stream_ordering_and_success.__func__
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)
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update_pusher_failing_since = (
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DataStore.update_pusher_failing_since.__func__
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)
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update_pusher_last_stream_ordering = (
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DataStore.update_pusher_last_stream_ordering.__func__
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)
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get_throttle_params_by_room = (
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DataStore.get_throttle_params_by_room.__func__
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)
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set_throttle_params = (
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DataStore.set_throttle_params.__func__
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)
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get_time_of_last_push_action_before = (
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DataStore.get_time_of_last_push_action_before.__func__
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)
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get_profile_displayname = (
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DataStore.get_profile_displayname.__func__
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)
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class PusherServer(HomeServer):
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def setup(self):
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logger.info("Setting up.")
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self.datastore = PusherSlaveStore(self.get_db_conn(), self)
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logger.info("Finished setting up.")
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def remove_pusher(self, app_id, push_key, user_id):
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self.get_tcp_replication().send_remove_pusher(app_id, push_key, user_id)
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def _listen_http(self, listener_config):
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port = listener_config["port"]
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bind_addresses = listener_config["bind_addresses"]
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site_tag = listener_config.get("tag", port)
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resources = {}
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for res in listener_config["resources"]:
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for name in res["names"]:
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if name == "metrics":
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resources[METRICS_PREFIX] = MetricsResource(self)
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root_resource = create_resource_tree(resources, NoResource())
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_base.listen_tcp(
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bind_addresses,
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port,
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SynapseSite(
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"synapse.access.http.%s" % (site_tag,),
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site_tag,
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listener_config,
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root_resource,
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)
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)
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logger.info("Synapse pusher now listening on port %d", port)
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def start_listening(self, listeners):
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for listener in listeners:
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if listener["type"] == "http":
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self._listen_http(listener)
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elif listener["type"] == "manhole":
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_base.listen_tcp(
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listener["bind_addresses"],
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listener["port"],
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manhole(
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username="matrix",
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password="rabbithole",
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globals={"hs": self},
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)
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)
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else:
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logger.warn("Unrecognized listener type: %s", listener["type"])
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self.get_tcp_replication().start_replication(self)
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def build_tcp_replication(self):
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return PusherReplicationHandler(self)
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class PusherReplicationHandler(ReplicationClientHandler):
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def __init__(self, hs):
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super(PusherReplicationHandler, self).__init__(hs.get_datastore())
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self.pusher_pool = hs.get_pusherpool()
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def on_rdata(self, stream_name, token, rows):
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super(PusherReplicationHandler, self).on_rdata(stream_name, token, rows)
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preserve_fn(self.poke_pushers)(stream_name, token, rows)
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@defer.inlineCallbacks
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def poke_pushers(self, stream_name, token, rows):
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try:
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if stream_name == "pushers":
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for row in rows:
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if row.deleted:
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yield self.stop_pusher(row.user_id, row.app_id, row.pushkey)
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else:
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yield self.start_pusher(row.user_id, row.app_id, row.pushkey)
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elif stream_name == "events":
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yield self.pusher_pool.on_new_notifications(
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token, token,
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)
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elif stream_name == "receipts":
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yield self.pusher_pool.on_new_receipts(
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token, token, set(row.room_id for row in rows)
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)
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except Exception:
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logger.exception("Error poking pushers")
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def stop_pusher(self, user_id, app_id, pushkey):
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key = "%s:%s" % (app_id, pushkey)
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pushers_for_user = self.pusher_pool.pushers.get(user_id, {})
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pusher = pushers_for_user.pop(key, None)
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if pusher is None:
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return
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logger.info("Stopping pusher %r / %r", user_id, key)
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pusher.on_stop()
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def start_pusher(self, user_id, app_id, pushkey):
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key = "%s:%s" % (app_id, pushkey)
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logger.info("Starting pusher %r / %r", user_id, key)
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return self.pusher_pool._refresh_pusher(app_id, pushkey, user_id)
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def start(config_options):
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try:
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config = HomeServerConfig.load_config(
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"Synapse pusher", config_options
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)
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except ConfigError as e:
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sys.stderr.write("\n" + e.message + "\n")
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sys.exit(1)
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assert config.worker_app == "synapse.app.pusher"
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setup_logging(config, use_worker_options=True)
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events.USE_FROZEN_DICTS = config.use_frozen_dicts
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if config.start_pushers:
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sys.stderr.write(
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"\nThe pushers must be disabled in the main synapse process"
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"\nbefore they can be run in a separate worker."
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"\nPlease add ``start_pushers: false`` to the main config"
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"\n"
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)
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sys.exit(1)
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# Force the pushers to start since they will be disabled in the main config
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config.start_pushers = True
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database_engine = create_engine(config.database_config)
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ps = PusherServer(
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config.server_name,
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db_config=config.database_config,
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config=config,
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version_string="Synapse/" + get_version_string(synapse),
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database_engine=database_engine,
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)
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ps.setup()
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ps.start_listening(config.worker_listeners)
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def start():
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ps.get_pusherpool().start()
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ps.get_datastore().start_profiling()
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ps.get_state_handler().start_caching()
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reactor.callWhenRunning(start)
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_base.start_worker_reactor("synapse-pusher", config)
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if __name__ == '__main__':
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with LoggingContext("main"):
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ps = start(sys.argv[1:])
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