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Move server command handling out of TCP protocol (#7187)

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This completes the merging of server and client command processing.
This commit is contained in:
Erik Johnston 2020-04-07 10:51:07 +01:00 • committed by GitHub
parent 71953139d1
commit 82498ee901
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4 changed files with 238 additions and 270 deletions
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163
synapse/replication/tcp/resource.py
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@ -17,7 +17,7 @@
import logging
import random
from typing import Any, Dict, List
from typing import Dict
from six import itervalues
@ -25,24 +25,14 @@ from prometheus_client import Counter
from twisted.internet.protocol import Factory
from synapse.metrics import LaterGauge
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.util.metrics import Measure, measure_func
from .protocol import ServerReplicationStreamProtocol
from .streams import STREAMS_MAP, Stream
from .streams.federation import FederationStream
from synapse.replication.tcp.protocol import ServerReplicationStreamProtocol
from synapse.replication.tcp.streams import STREAMS_MAP, FederationStream, Stream
from synapse.util.metrics import Measure
stream_updates_counter = Counter(
"synapse_replication_tcp_resource_stream_updates", "", ["stream_name"]
)
user_sync_counter = Counter("synapse_replication_tcp_resource_user_sync", "")
federation_ack_counter = Counter("synapse_replication_tcp_resource_federation_ack", "")
remove_pusher_counter = Counter("synapse_replication_tcp_resource_remove_pusher", "")
invalidate_cache_counter = Counter(
"synapse_replication_tcp_resource_invalidate_cache", ""
)
user_ip_cache_counter = Counter("synapse_replication_tcp_resource_user_ip_cache", "")
logger = logging.getLogger(__name__)
@ -52,13 +42,23 @@ class ReplicationStreamProtocolFactory(Factory):
"""
def __init__(self, hs):
self.streamer = hs.get_replication_streamer()
self.command_handler = hs.get_tcp_replication()
self.clock = hs.get_clock()
self.server_name = hs.config.server_name
# If we've created a `ReplicationStreamProtocolFactory` then we're
# almost certainly registering a replication listener, so let's ensure
# that we've started a `ReplicationStreamer` instance to actually push
# data.
#
# (This is a bit of a weird place to do this, but the alternatives such
# as putting this in `HomeServer.setup()`, requires either passing the
# listener config again or always starting a `ReplicationStreamer`.)
hs.get_replication_streamer()
def buildProtocol(self, addr):
return ServerReplicationStreamProtocol(
self.server_name, self.clock, self.streamer
self.server_name, self.clock, self.command_handler
)
@ -78,16 +78,6 @@ class ReplicationStreamer(object):
self._replication_torture_level = hs.config.replication_torture_level
# Current connections.
self.connections = [] # type: List[ServerReplicationStreamProtocol]
LaterGauge(
"synapse_replication_tcp_resource_total_connections",
"",
[],
lambda: len(self.connections),
)
# List of streams that clients can subscribe to.
# We only support federation stream if federation sending hase been
# disabled on the master.
@ -104,18 +94,12 @@ class ReplicationStreamer(object):
self.federation_sender = hs.get_federation_sender()
self.notifier.add_replication_callback(self.on_notifier_poke)
self.notifier.add_remote_server_up_callback(self.send_remote_server_up)
# Keeps track of whether we are currently checking for updates
self.is_looping = False
self.pending_updates = False
hs.get_reactor().addSystemEventTrigger("before", "shutdown", self.on_shutdown)
def on_shutdown(self):
# close all connections on shutdown
for conn in self.connections:
conn.send_error("server shutting down")
self.command_handler = hs.get_tcp_replication()
def get_streams(self) -> Dict[str, Stream]:
"""Get a mapp from stream name to stream instance.
@ -129,7 +113,7 @@ class ReplicationStreamer(object):
This should get called each time new data is available, even if it
is currently being executed, so that nothing gets missed
"""
if not self.connections:
if not self.command_handler.connected():
# Don't bother if nothing is listening. We still need to advance
# the stream tokens otherwise they'll fall beihind forever
for stream in self.streams:
@ -186,9 +170,7 @@ class ReplicationStreamer(object):
raise
logger.debug(
"Sending %d updates to %d connections",
len(updates),
len(self.connections),
"Sending %d updates", len(updates),
)
if updates:
@ -204,112 +186,19 @@ class ReplicationStreamer(object):
# token. See RdataCommand for more details.
batched_updates = _batch_updates(updates)
for conn in self.connections:
for token, row in batched_updates:
try:
conn.stream_update(stream.NAME, token, row)
except Exception:
logger.exception("Failed to replicate")
for token, row in batched_updates:
try:
self.command_handler.stream_update(
stream.NAME, token, row
)
except Exception:
logger.exception("Failed to replicate")
logger.debug("No more pending updates, breaking poke loop")
finally:
self.pending_updates = False
self.is_looping = False
def get_stream_token(self, stream_name):
"""For a given stream get all updates since token. This is called when
a client first subscribes to a stream.
"""
stream = self.streams_by_name.get(stream_name, None)
if not stream:
raise Exception("unknown stream %s", stream_name)
return stream.current_token()
@measure_func("repl.federation_ack")
def federation_ack(self, token):
"""We've received an ack for federation stream from a client.
"""
federation_ack_counter.inc()
if self.federation_sender:
self.federation_sender.federation_ack(token)
@measure_func("repl.on_user_sync")
async def on_user_sync(self, instance_id, user_id, is_syncing, last_sync_ms):
"""A client has started/stopped syncing on a worker.
"""
user_sync_counter.inc()
await self.presence_handler.update_external_syncs_row(
instance_id, user_id, is_syncing, last_sync_ms
)
async def on_clear_user_syncs(self, instance_id):
"""A replication client wants us to drop all their UserSync data.
"""
await self.presence_handler.update_external_syncs_clear(instance_id)
@measure_func("repl.on_remove_pusher")
async def on_remove_pusher(self, app_id, push_key, user_id):
"""A client has asked us to remove a pusher
"""
remove_pusher_counter.inc()
await self.store.delete_pusher_by_app_id_pushkey_user_id(
app_id=app_id, pushkey=push_key, user_id=user_id
)
self.notifier.on_new_replication_data()
@measure_func("repl.on_invalidate_cache")
async def on_invalidate_cache(self, cache_func: str, keys: List[Any]):
"""The client has asked us to invalidate a cache
"""
invalidate_cache_counter.inc()
# We invalidate the cache locally, but then also stream that to other
# workers.
await self.store.invalidate_cache_and_stream(cache_func, tuple(keys))
@measure_func("repl.on_user_ip")
async def on_user_ip(
self, user_id, access_token, ip, user_agent, device_id, last_seen
):
"""The client saw a user request
"""
user_ip_cache_counter.inc()
await self.store.insert_client_ip(
user_id, access_token, ip, user_agent, device_id, last_seen
)
await self._server_notices_sender.on_user_ip(user_id)
@measure_func("repl.on_remote_server_up")
def on_remote_server_up(self, server: str):
self.notifier.notify_remote_server_up(server)
def send_remote_server_up(self, server: str):
for conn in self.connections:
conn.send_remote_server_up(server)
def send_sync_to_all_connections(self, data):
"""Sends a SYNC command to all clients.
Used in tests.
"""
for conn in self.connections:
conn.send_sync(data)
def new_connection(self, connection):
"""A new client connection has been established
"""
self.connections.append(connection)
def lost_connection(self, connection):
"""A client connection has been lost
"""
try:
self.connections.remove(connection)
except ValueError:
pass
def _batch_updates(updates):
"""Takes a list of updates of form [(token, row)] and sets the token to