mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-23 10:45:48 +00:00
0e8d78f6aa
Run the handlers for replication commands as background processes. This should improve the visibility in our metrics, and reduce the number of "running db transaction from sentinel context" warnings. Ideally it means converting the things that fire off deferreds into the night into things that actually return a Deferred when they are done. I've made a bit of a stab at this, but it will probably be leaky.
207 lines
7.3 KiB
Python
207 lines
7.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2017 Vector Creations Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
"""A replication client for use by synapse workers.
|
|
"""
|
|
|
|
import logging
|
|
|
|
from twisted.internet import defer
|
|
from twisted.internet.protocol import ReconnectingClientFactory
|
|
|
|
from .commands import (
|
|
FederationAckCommand,
|
|
InvalidateCacheCommand,
|
|
RemovePusherCommand,
|
|
UserIpCommand,
|
|
UserSyncCommand,
|
|
)
|
|
from .protocol import ClientReplicationStreamProtocol
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class ReplicationClientFactory(ReconnectingClientFactory):
|
|
"""Factory for building connections to the master. Will reconnect if the
|
|
connection is lost.
|
|
|
|
Accepts a handler that will be called when new data is available or data
|
|
is required.
|
|
"""
|
|
maxDelay = 5 # Try at least once every N seconds
|
|
|
|
def __init__(self, hs, client_name, handler):
|
|
self.client_name = client_name
|
|
self.handler = handler
|
|
self.server_name = hs.config.server_name
|
|
self._clock = hs.get_clock() # As self.clock is defined in super class
|
|
|
|
hs.get_reactor().addSystemEventTrigger("before", "shutdown", self.stopTrying)
|
|
|
|
def startedConnecting(self, connector):
|
|
logger.info("Connecting to replication: %r", connector.getDestination())
|
|
|
|
def buildProtocol(self, addr):
|
|
logger.info("Connected to replication: %r", addr)
|
|
self.resetDelay()
|
|
return ClientReplicationStreamProtocol(
|
|
self.client_name, self.server_name, self._clock, self.handler
|
|
)
|
|
|
|
def clientConnectionLost(self, connector, reason):
|
|
logger.error("Lost replication conn: %r", reason)
|
|
ReconnectingClientFactory.clientConnectionLost(self, connector, reason)
|
|
|
|
def clientConnectionFailed(self, connector, reason):
|
|
logger.error("Failed to connect to replication: %r", reason)
|
|
ReconnectingClientFactory.clientConnectionFailed(
|
|
self, connector, reason
|
|
)
|
|
|
|
|
|
class ReplicationClientHandler(object):
|
|
"""A base handler that can be passed to the ReplicationClientFactory.
|
|
|
|
By default proxies incoming replication data to the SlaveStore.
|
|
"""
|
|
def __init__(self, store):
|
|
self.store = store
|
|
|
|
# The current connection. None if we are currently (re)connecting
|
|
self.connection = None
|
|
|
|
# Any pending commands to be sent once a new connection has been
|
|
# established
|
|
self.pending_commands = []
|
|
|
|
# Map from string -> deferred, to wake up when receiveing a SYNC with
|
|
# the given string.
|
|
# Used for tests.
|
|
self.awaiting_syncs = {}
|
|
|
|
def start_replication(self, hs):
|
|
"""Helper method to start a replication connection to the remote server
|
|
using TCP.
|
|
"""
|
|
client_name = hs.config.worker_name
|
|
factory = ReplicationClientFactory(hs, client_name, self)
|
|
host = hs.config.worker_replication_host
|
|
port = hs.config.worker_replication_port
|
|
hs.get_reactor().connectTCP(host, port, factory)
|
|
|
|
def on_rdata(self, stream_name, token, rows):
|
|
"""Called when we get new replication data. By default this just pokes
|
|
the slave store.
|
|
|
|
Can be overriden in subclasses to handle more.
|
|
"""
|
|
logger.info("Received rdata %s -> %s", stream_name, token)
|
|
return self.store.process_replication_rows(stream_name, token, rows)
|
|
|
|
def on_position(self, stream_name, token):
|
|
"""Called when we get new position data. By default this just pokes
|
|
the slave store.
|
|
|
|
Can be overriden in subclasses to handle more.
|
|
"""
|
|
return self.store.process_replication_rows(stream_name, token, [])
|
|
|
|
def on_sync(self, data):
|
|
"""When we received a SYNC we wake up any deferreds that were waiting
|
|
for the sync with the given data.
|
|
|
|
Used by tests.
|
|
"""
|
|
d = self.awaiting_syncs.pop(data, None)
|
|
if d:
|
|
d.callback(data)
|
|
|
|
def get_streams_to_replicate(self):
|
|
"""Called when a new connection has been established and we need to
|
|
subscribe to streams.
|
|
|
|
Returns a dictionary of stream name to token.
|
|
"""
|
|
args = self.store.stream_positions()
|
|
user_account_data = args.pop("user_account_data", None)
|
|
room_account_data = args.pop("room_account_data", None)
|
|
if user_account_data:
|
|
args["account_data"] = user_account_data
|
|
elif room_account_data:
|
|
args["account_data"] = room_account_data
|
|
return args
|
|
|
|
def get_currently_syncing_users(self):
|
|
"""Get the list of currently syncing users (if any). This is called
|
|
when a connection has been established and we need to send the
|
|
currently syncing users. (Overriden by the synchrotron's only)
|
|
"""
|
|
return []
|
|
|
|
def send_command(self, cmd):
|
|
"""Send a command to master (when we get establish a connection if we
|
|
don't have one already.)
|
|
"""
|
|
if self.connection:
|
|
self.connection.send_command(cmd)
|
|
else:
|
|
logger.warn("Queuing command as not connected: %r", cmd.NAME)
|
|
self.pending_commands.append(cmd)
|
|
|
|
def send_federation_ack(self, token):
|
|
"""Ack data for the federation stream. This allows the master to drop
|
|
data stored purely in memory.
|
|
"""
|
|
self.send_command(FederationAckCommand(token))
|
|
|
|
def send_user_sync(self, user_id, is_syncing, last_sync_ms):
|
|
"""Poke the master that a user has started/stopped syncing.
|
|
"""
|
|
self.send_command(UserSyncCommand(user_id, is_syncing, last_sync_ms))
|
|
|
|
def send_remove_pusher(self, app_id, push_key, user_id):
|
|
"""Poke the master to remove a pusher for a user
|
|
"""
|
|
cmd = RemovePusherCommand(app_id, push_key, user_id)
|
|
self.send_command(cmd)
|
|
|
|
def send_invalidate_cache(self, cache_func, keys):
|
|
"""Poke the master to invalidate a cache.
|
|
"""
|
|
cmd = InvalidateCacheCommand(cache_func.__name__, keys)
|
|
self.send_command(cmd)
|
|
|
|
def send_user_ip(self, user_id, access_token, ip, user_agent, device_id, last_seen):
|
|
"""Tell the master that the user made a request.
|
|
"""
|
|
cmd = UserIpCommand(user_id, access_token, ip, user_agent, device_id, last_seen)
|
|
self.send_command(cmd)
|
|
|
|
def await_sync(self, data):
|
|
"""Returns a deferred that is resolved when we receive a SYNC command
|
|
with given data.
|
|
|
|
[Not currently] used by tests.
|
|
"""
|
|
return self.awaiting_syncs.setdefault(data, defer.Deferred())
|
|
|
|
def update_connection(self, connection):
|
|
"""Called when a connection has been established (or lost with None).
|
|
"""
|
|
self.connection = connection
|
|
if connection:
|
|
for cmd in self.pending_commands:
|
|
connection.send_command(cmd)
|
|
self.pending_commands = []
|