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Move client command handling out of TCP protocol (#7185)

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The aim here is to move the command handling out of the TCP protocol classes and to also merge the client and server command handling (so that we can reuse them for redis protocol). This PR simply moves the client paths to the new `ReplicationCommandHandler`, a future PR will move the server paths too.
This commit is contained in:
Erik Johnston 2020-04-06 09:58:42 +01:00 committed by GitHub
parent d73bf18d13
commit 5016b162fc
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12 changed files with 379 additions and 372 deletions
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1
changelog.d/7185.misc Normal file
View file

@ -0,0 +1 @@
Move client command handling out of TCP protocol.

12
synapse/app/admin_cmd.py
View file

@ -43,7 +43,6 @@ from synapse.replication.slave.storage.push_rule import SlavedPushRuleStore
from synapse.replication.slave.storage.receipts import SlavedReceiptsStore
from synapse.replication.slave.storage.registration import SlavedRegistrationStore
from synapse.replication.slave.storage.room import RoomStore
from synapse.replication.tcp.client import ReplicationClientHandler
from synapse.server import HomeServer
from synapse.util.logcontext import LoggingContext
from synapse.util.versionstring import get_version_string
@ -79,17 +78,6 @@ class AdminCmdServer(HomeServer):
def start_listening(self, listeners):
pass
def build_tcp_replication(self):
return AdminCmdReplicationHandler(self)
class AdminCmdReplicationHandler(ReplicationClientHandler):
async def on_rdata(self, stream_name, token, rows):
pass
def get_streams_to_replicate(self):
return {}
@defer.inlineCallbacks
def export_data_command(hs, args):

9
synapse/app/generic_worker.py
View file

@ -64,7 +64,7 @@ from synapse.replication.slave.storage.receipts import SlavedReceiptsStore
from synapse.replication.slave.storage.registration import SlavedRegistrationStore
from synapse.replication.slave.storage.room import RoomStore
from synapse.replication.slave.storage.transactions import SlavedTransactionStore
from synapse.replication.tcp.client import ReplicationClientHandler
from synapse.replication.tcp.client import ReplicationDataHandler
from synapse.replication.tcp.commands import ClearUserSyncsCommand
from synapse.replication.tcp.streams import (
AccountDataStream,
@ -603,7 +603,7 @@ class GenericWorkerServer(HomeServer):
def remove_pusher(self, app_id, push_key, user_id):
self.get_tcp_replication().send_remove_pusher(app_id, push_key, user_id)
def build_tcp_replication(self):
def build_replication_data_handler(self):
return GenericWorkerReplicationHandler(self)
def build_presence_handler(self):
@ -613,7 +613,7 @@ class GenericWorkerServer(HomeServer):
return GenericWorkerTyping(self)
class GenericWorkerReplicationHandler(ReplicationClientHandler):
class GenericWorkerReplicationHandler(ReplicationDataHandler):
def __init__(self, hs):
super(GenericWorkerReplicationHandler, self).__init__(hs.get_datastore())
@ -644,9 +644,6 @@ class GenericWorkerReplicationHandler(ReplicationClientHandler):
args.update(self.send_handler.stream_positions())
return args
def get_currently_syncing_users(self):
return self.presence_handler.get_currently_syncing_users()
async def process_and_notify(self, stream_name, token, rows):
try:
if self.send_handler:

30
synapse/replication/tcp/__init__.py
View file

@ -20,11 +20,31 @@ Further details can be found in docs/tcp_replication.rst
Structure of the module:
* client.py - the client classes used for workers to connect to master
* handler.py - the classes used to handle sending/receiving commands to
replication
* command.py - the definitions of all the valid commands
* protocol.py - contains bot the client and server protocol implementations,
these should not be used directly
* resource.py - the server classes that accepts and handle client connections
* streams.py - the definitons of all the valid streams
* protocol.py - the TCP protocol classes
* resource.py - handles streaming stream updates to replications
* streams/ - the definitons of all the valid streams
The general interaction of the classes are:
+---------------------+
| ReplicationStreamer |
+---------------------+
|
v
+---------------------------+ +----------------------+
| ReplicationCommandHandler |---->|ReplicationDataHandler|
+---------------------------+ +----------------------+
| ^
v |
+-------------+
| Protocols |
| (TCP/redis) |
+-------------+
Where the ReplicationDataHandler (or subclasses) handles incoming stream
updates.
"""

177
synapse/replication/tcp/client.py
View file

@ -16,26 +16,16 @@
"""
import logging
from typing import Dict, List, Optional
from typing import TYPE_CHECKING, Dict
from twisted.internet import defer
from twisted.internet.protocol import ReconnectingClientFactory
from synapse.replication.slave.storage._base import BaseSlavedStore
from synapse.replication.tcp.protocol import (
AbstractReplicationClientHandler,
ClientReplicationStreamProtocol,
)
from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
from .commands import (
Command,
FederationAckCommand,
InvalidateCacheCommand,
RemoteServerUpCommand,
RemovePusherCommand,
UserIpCommand,
UserSyncCommand,
)
if TYPE_CHECKING:
from synapse.server import HomeServer
from synapse.replication.tcp.handler import ReplicationCommandHandler
logger = logging.getLogger(__name__)
@ -44,16 +34,20 @@ 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.
Accepts a handler that is passed to `ClientReplicationStreamProtocol`.
"""
initialDelay = 0.1
maxDelay = 1 # Try at least once every N seconds
def __init__(self, hs, client_name, handler: AbstractReplicationClientHandler):
def __init__(
self,
hs: "HomeServer",
client_name: str,
command_handler: "ReplicationCommandHandler",
):
self.client_name = client_name
self.handler = handler
self.command_handler = command_handler
self.server_name = hs.config.server_name
self.hs = hs
self._clock = hs.get_clock() # As self.clock is defined in super class
@ -66,7 +60,11 @@ class ReplicationClientFactory(ReconnectingClientFactory):
def buildProtocol(self, addr):
logger.info("Connected to replication: %r", addr)
return ClientReplicationStreamProtocol(
self.hs, self.client_name, self.server_name, self._clock, self.handler,
self.hs,
self.client_name,
self.server_name,
self._clock,
self.command_handler,
)
def clientConnectionLost(self, connector, reason):
@ -78,41 +76,17 @@ class ReplicationClientFactory(ReconnectingClientFactory):
ReconnectingClientFactory.clientConnectionFailed(self, connector, reason)
class ReplicationClientHandler(AbstractReplicationClientHandler):
"""A base handler that can be passed to the ReplicationClientFactory.
class ReplicationDataHandler:
"""Handles incoming stream updates from replication.
By default proxies incoming replication data to the SlaveStore.
This instance notifies the slave data store about updates. Can be subclassed
to handle updates in additional ways.
"""
def __init__(self, store: BaseSlavedStore):
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 = [] # type: List[Command]
# Map from string -> deferred, to wake up when receiveing a SYNC with
# the given string.
# Used for tests.
self.awaiting_syncs = {} # type: Dict[str, defer.Deferred]
# The factory used to create connections.
self.factory = None # type: Optional[ReplicationClientFactory]
def start_replication(self, hs):
"""Helper method to start a replication connection to the remote server
using TCP.
"""
client_name = hs.config.worker_name
self.factory = ReplicationClientFactory(hs, client_name, self)
host = hs.config.worker_replication_host
port = hs.config.worker_replication_port
hs.get_reactor().connectTCP(host, port, self.factory)
async def on_rdata(self, stream_name, token, rows):
async def on_rdata(self, stream_name: str, token: int, rows: list):
"""Called to handle a batch of replication data with a given stream token.
By default this just pokes the slave store. Can be overridden in subclasses to
@ -124,30 +98,8 @@ class ReplicationClientHandler(AbstractReplicationClientHandler):
rows (list): a list of Stream.ROW_TYPE objects as returned by
Stream.parse_row.
"""
logger.debug("Received rdata %s -> %s", stream_name, token)
self.store.process_replication_rows(stream_name, token, rows)
async 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.
"""
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 on_remote_server_up(self, server: str):
"""Called when get a new REMOTE_SERVER_UP command."""
def get_streams_to_replicate(self) -> Dict[str, int]:
"""Called when a new connection has been established and we need to
subscribe to streams.
@ -163,85 +115,10 @@ class ReplicationClientHandler(AbstractReplicationClientHandler):
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 []
async def on_position(self, stream_name: str, token: int):
self.store.process_replication_rows(stream_name, token, [])
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.warning("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, instance_id, user_id, is_syncing, last_sync_ms):
"""Poke the master that a user has started/stopped syncing.
"""
self.send_command(
UserSyncCommand(instance_id, 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 send_remote_server_up(self, server: str):
self.send_command(RemoteServerUpCommand(server))
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 = []
def finished_connecting(self):
"""Called when we have successfully subscribed and caught up to all
streams we're interested in.
"""
logger.info("Finished connecting to server")
# We don't reset the delay any earlier as otherwise if there is a
# problem during start up we'll end up tight looping connecting to the
# server.
if self.factory:
self.factory.resetDelay()
def on_remote_server_up(self, server: str):
"""Called when get a new REMOTE_SERVER_UP command."""

252
synapse/replication/tcp/handler.py Normal file
View file

@ -0,0 +1,252 @@
# -*- coding: utf-8 -*-
# Copyright 2017 Vector Creations Ltd
# Copyright 2020 The Matrix.org Foundation C.I.C.
#
# 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.
import logging
from typing import Any, Callable, Dict, List, Optional, Set
from prometheus_client import Counter
from synapse.replication.tcp.client import ReplicationClientFactory
from synapse.replication.tcp.commands import (
Command,
FederationAckCommand,
InvalidateCacheCommand,
PositionCommand,
RdataCommand,
RemoteServerUpCommand,
RemovePusherCommand,
SyncCommand,
UserIpCommand,
UserSyncCommand,
)
from synapse.replication.tcp.streams import STREAMS_MAP, Stream
from synapse.util.async_helpers import Linearizer
logger = logging.getLogger(__name__)
# number of updates received for each RDATA stream
inbound_rdata_count = Counter(
"synapse_replication_tcp_protocol_inbound_rdata_count", "", ["stream_name"]
)
class ReplicationCommandHandler:
"""Handles incoming commands from replication as well as sending commands
back out to connections.
"""
def __init__(self, hs):
self._replication_data_handler = hs.get_replication_data_handler()
self._presence_handler = hs.get_presence_handler()
# Set of streams that we've caught up with.
self._streams_connected = set() # type: Set[str]
self._streams = {
stream.NAME: stream(hs) for stream in STREAMS_MAP.values()
} # type: Dict[str, Stream]
self._position_linearizer = Linearizer("replication_position")
# Map of stream to batched updates. See RdataCommand for info on how
# batching works.
self._pending_batches = {} # type: Dict[str, List[Any]]
# The factory used to create connections.
self._factory = None # type: Optional[ReplicationClientFactory]
# The current connection. None if we are currently (re)connecting
self._connection = None
def start_replication(self, hs):
"""Helper method to start a replication connection to the remote server
using TCP.
"""
client_name = hs.config.worker_name
self._factory = ReplicationClientFactory(hs, client_name, self)
host = hs.config.worker_replication_host
port = hs.config.worker_replication_port
hs.get_reactor().connectTCP(host, port, self._factory)
async def on_RDATA(self, cmd: RdataCommand):
stream_name = cmd.stream_name
inbound_rdata_count.labels(stream_name).inc()
try:
row = STREAMS_MAP[stream_name].parse_row(cmd.row)
except Exception:
logger.exception("Failed to parse RDATA: %r %r", stream_name, cmd.row)
raise
if cmd.token is None or stream_name not in self._streams_connected:
# I.e. either this is part of a batch of updates for this stream (in
# which case batch until we get an update for the stream with a non
# None token) or we're currently connecting so we queue up rows.
self._pending_batches.setdefault(stream_name, []).append(row)
else:
# Check if this is the last of a batch of updates
rows = self._pending_batches.pop(stream_name, [])
rows.append(row)
await self.on_rdata(stream_name, cmd.token, rows)
async def on_rdata(self, stream_name: str, token: int, rows: list):
"""Called to handle a batch of replication data with a given stream token.
Args:
stream_name: name of the replication stream for this batch of rows
token: stream token for this batch of rows
rows: a list of Stream.ROW_TYPE objects as returned by
Stream.parse_row.
"""
logger.debug("Received rdata %s -> %s", stream_name, token)
await self._replication_data_handler.on_rdata(stream_name, token, rows)
async def on_POSITION(self, cmd: PositionCommand):
stream = self._streams.get(cmd.stream_name)
if not stream:
logger.error("Got POSITION for unknown stream: %s", cmd.stream_name)
return
# We protect catching up with a linearizer in case the replication
# connection reconnects under us.
with await self._position_linearizer.queue(cmd.stream_name):
# We're about to go and catch up with the stream, so mark as connecting
# to stop RDATA being handled at the same time by removing stream from
# list of connected streams. We also clear any batched up RDATA from
# before we got the POSITION.
self._streams_connected.discard(cmd.stream_name)
self._pending_batches.clear()
# Find where we previously streamed up to.
current_token = self._replication_data_handler.get_streams_to_replicate().get(
cmd.stream_name
)
if current_token is None:
logger.warning(
"Got POSITION for stream we're not subscribed to: %s",
cmd.stream_name,
)
return
# Fetch all updates between then and now.
limited = True
while limited:
updates, current_token, limited = await stream.get_updates_since(
current_token, cmd.token
)
if updates:
await self.on_rdata(
cmd.stream_name,
current_token,
[stream.parse_row(update[1]) for update in updates],
)
# We've now caught up to position sent to us, notify handler.
await self._replication_data_handler.on_position(cmd.stream_name, cmd.token)
# Handle any RDATA that came in while we were catching up.
rows = self._pending_batches.pop(cmd.stream_name, [])
if rows:
await self._replication_data_handler.on_rdata(
cmd.stream_name, rows[-1].token, rows
)
self._streams_connected.add(cmd.stream_name)
async def on_SYNC(self, cmd: SyncCommand):
pass
async def on_REMOTE_SERVER_UP(self, cmd: RemoteServerUpCommand):
""""Called when get a new REMOTE_SERVER_UP command."""
self._replication_data_handler.on_remote_server_up(cmd.data)
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.
"""
return self._presence_handler.get_currently_syncing_users()
def update_connection(self, connection):
"""Called when a connection has been established (or lost with None).
"""
self._connection = connection
def finished_connecting(self):
"""Called when we have successfully subscribed and caught up to all
streams we're interested in.
"""
logger.info("Finished connecting to server")
# We don't reset the delay any earlier as otherwise if there is a
# problem during start up we'll end up tight looping connecting to the
# server.
if self._factory:
self._factory.resetDelay()
def send_command(self, cmd: Command):
"""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.warning("Dropping command as not connected: %r", cmd.NAME)
def send_federation_ack(self, token: int):
"""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, instance_id: str, user_id: str, is_syncing: bool, last_sync_ms: int
):
"""Poke the master that a user has started/stopped syncing.
"""
self.send_command(
UserSyncCommand(instance_id, user_id, is_syncing, last_sync_ms)
)
def send_remove_pusher(self, app_id: str, push_key: str, user_id: str):
"""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: Callable, keys: tuple):
"""Poke the master to invalidate a cache.
"""
cmd = InvalidateCacheCommand(cache_func.__name__, keys)
self.send_command(cmd)
def send_user_ip(
self,
user_id: str,
access_token: str,
ip: str,
user_agent: str,
device_id: str,
last_seen: int,
):
"""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 send_remote_server_up(self, server: str):
self.send_command(RemoteServerUpCommand(server))

201
synapse/replication/tcp/protocol.py
View file

@ -46,12 +46,11 @@ indicate which side is sending, these are *not* included on the wire::
> ERROR server stopping
* connection closed by server *
"""
import abc
import fcntl
import logging
import struct
from collections import defaultdict
from typing import Any, DefaultDict, Dict, List, Set
from typing import TYPE_CHECKING, DefaultDict, List
from six import iteritems
@ -78,13 +77,12 @@ from synapse.replication.tcp.commands import (
SyncCommand,
UserSyncCommand,
)
from synapse.replication.tcp.streams import STREAMS_MAP, Stream
from synapse.types import Collection
from synapse.util import Clock
from synapse.util.stringutils import random_string
MYPY = False
if MYPY:
if TYPE_CHECKING:
from synapse.replication.tcp.handler import ReplicationCommandHandler
from synapse.server import HomeServer
@ -475,71 +473,6 @@ class ServerReplicationStreamProtocol(BaseReplicationStreamProtocol):
self.streamer.lost_connection(self)
class AbstractReplicationClientHandler(metaclass=abc.ABCMeta):
"""
The interface for the handler that should be passed to
ClientReplicationStreamProtocol
"""
@abc.abstractmethod
async def on_rdata(self, stream_name, token, rows):
"""Called to handle a batch of replication data with a given stream token.
Args:
stream_name (str): name of the replication stream for this batch of rows
token (int): stream token for this batch of rows
rows (list): a list of Stream.ROW_TYPE objects as returned by
Stream.parse_row.
"""
raise NotImplementedError()
@abc.abstractmethod
async def on_position(self, stream_name, token):
"""Called when we get new position data."""
raise NotImplementedError()
@abc.abstractmethod
def on_sync(self, data):
"""Called when get a new SYNC command."""
raise NotImplementedError()
@abc.abstractmethod
async def on_remote_server_up(self, server: str):
"""Called when get a new REMOTE_SERVER_UP command."""
raise NotImplementedError()
@abc.abstractmethod
def get_streams_to_replicate(self):
"""Called when a new connection has been established and we need to
subscribe to streams.
Returns:
map from stream name to the most recent update we have for
that stream (ie, the point we want to start replicating from)
"""
raise NotImplementedError()
@abc.abstractmethod
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."""
raise NotImplementedError()
@abc.abstractmethod
def update_connection(self, connection):
"""Called when a connection has been established (or lost with None).
"""
raise NotImplementedError()
@abc.abstractmethod
def finished_connecting(self):
"""Called when we have successfully subscribed and caught up to all
streams we're interested in.
"""
raise NotImplementedError()
class ClientReplicationStreamProtocol(BaseReplicationStreamProtocol):
VALID_INBOUND_COMMANDS = VALID_SERVER_COMMANDS
VALID_OUTBOUND_COMMANDS = VALID_CLIENT_COMMANDS
@ -550,7 +483,7 @@ class ClientReplicationStreamProtocol(BaseReplicationStreamProtocol):
client_name: str,
server_name: str,
clock: Clock,
handler: AbstractReplicationClientHandler,
command_handler: "ReplicationCommandHandler",
):
BaseReplicationStreamProtocol.__init__(self, clock)
@ -558,20 +491,7 @@ class ClientReplicationStreamProtocol(BaseReplicationStreamProtocol):
self.client_name = client_name
self.server_name = server_name
self.handler = handler
self.streams = {
stream.NAME: stream(hs) for stream in STREAMS_MAP.values()
} # type: Dict[str, Stream]
# Set of stream names that have been subscribe to, but haven't yet
# caught up with. This is used to track when the client has been fully
# connected to the remote.
self.streams_connecting = set(STREAMS_MAP) # type: Set[str]
# Map of stream to batched updates. See RdataCommand for info on how
# batching works.
self.pending_batches = {} # type: Dict[str, List[Any]]
self.handler = command_handler
def connectionMade(self):
self.send_command(NameCommand(self.client_name))
@ -589,90 +509,40 @@ class ClientReplicationStreamProtocol(BaseReplicationStreamProtocol):
# We've now finished connecting to so inform the client handler
self.handler.update_connection(self)
self.handler.finished_connecting()
async def handle_command(self, cmd: Command):
"""Handle a command we have received over the replication stream.
Delegates to `command_handler.on_<COMMAND>`, which must return an
awaitable.
Args:
cmd: received command
"""
handled = False
# First call any command handlers on this instance. These are for TCP
# specific handling.
cmd_func = getattr(self, "on_%s" % (cmd.NAME,), None)
if cmd_func:
await cmd_func(cmd)
handled = True
# Then call out to the handler.
cmd_func = getattr(self.handler, "on_%s" % (cmd.NAME,), None)
if cmd_func:
await cmd_func(cmd)
handled = True
if not handled:
logger.warning("Unhandled command: %r", cmd)
async def on_SERVER(self, cmd):
if cmd.data != self.server_name:
logger.error("[%s] Connected to wrong remote: %r", self.id(), cmd.data)
self.send_error("Wrong remote")
async def on_RDATA(self, cmd):
stream_name = cmd.stream_name
inbound_rdata_count.labels(stream_name).inc()
try:
row = STREAMS_MAP[stream_name].parse_row(cmd.row)
except Exception:
logger.exception(
"[%s] Failed to parse RDATA: %r %r", self.id(), stream_name, cmd.row
)
raise
if cmd.token is None or stream_name in self.streams_connecting:
# I.e. this is part of a batch of updates for this stream. Batch
# until we get an update for the stream with a non None token
self.pending_batches.setdefault(stream_name, []).append(row)
else:
# Check if this is the last of a batch of updates
rows = self.pending_batches.pop(stream_name, [])
rows.append(row)
await self.handler.on_rdata(stream_name, cmd.token, rows)
async def on_POSITION(self, cmd: PositionCommand):
stream = self.streams.get(cmd.stream_name)
if not stream:
logger.error("Got POSITION for unknown stream: %s", cmd.stream_name)
return
# Find where we previously streamed up to.
current_token = self.handler.get_streams_to_replicate().get(cmd.stream_name)
if current_token is None:
logger.warning(
"Got POSITION for stream we're not subscribed to: %s", cmd.stream_name
)
return
# Fetch all updates between then and now.
limited = True
while limited:
updates, current_token, limited = await stream.get_updates_since(
current_token, cmd.token
)
# Check if the connection was closed underneath us, if so we bail
# rather than risk having concurrent catch ups going on.
if self.state == ConnectionStates.CLOSED:
return
if updates:
await self.handler.on_rdata(
cmd.stream_name,
current_token,
[stream.parse_row(update[1]) for update in updates],
)
# We've now caught up to position sent to us, notify handler.
await self.handler.on_position(cmd.stream_name, cmd.token)
self.streams_connecting.discard(cmd.stream_name)
if not self.streams_connecting:
self.handler.finished_connecting()
# Check if the connection was closed underneath us, if so we bail
# rather than risk having concurrent catch ups going on.
if self.state == ConnectionStates.CLOSED:
return
# Handle any RDATA that came in while we were catching up.
rows = self.pending_batches.pop(cmd.stream_name, [])
if rows:
await self.handler.on_rdata(cmd.stream_name, rows[-1].token, rows)
async def on_SYNC(self, cmd):
self.handler.on_sync(cmd.data)
async def on_REMOTE_SERVER_UP(self, cmd: RemoteServerUpCommand):
self.handler.on_remote_server_up(cmd.data)
def replicate(self):
"""Send the subscription request to the server
"""
@ -768,8 +638,3 @@ tcp_outbound_commands = LaterGauge(
for k, count in iteritems(p.outbound_commands_counter)
},
)
# number of updates received for each RDATA stream
inbound_rdata_count = Counter(
"synapse_replication_tcp_protocol_inbound_rdata_count", "", ["stream_name"]
)

8
synapse/server.py
View file

@ -87,6 +87,8 @@ from synapse.http.matrixfederationclient import MatrixFederationHttpClient
from synapse.notifier import Notifier
from synapse.push.action_generator import ActionGenerator
from synapse.push.pusherpool import PusherPool
from synapse.replication.tcp.client import ReplicationDataHandler
from synapse.replication.tcp.handler import ReplicationCommandHandler
from synapse.replication.tcp.resource import ReplicationStreamer
from synapse.rest.media.v1.media_repository import (
MediaRepository,
@ -206,6 +208,7 @@ class HomeServer(object):
"password_policy_handler",
"storage",
"replication_streamer",
"replication_data_handler",
]
REQUIRED_ON_MASTER_STARTUP = ["user_directory_handler", "stats_handler"]
@ -468,7 +471,7 @@ class HomeServer(object):
return ReadMarkerHandler(self)
def build_tcp_replication(self):
raise NotImplementedError()
return ReplicationCommandHandler(self)
def build_action_generator(self):
return ActionGenerator(self)
@ -562,6 +565,9 @@ class HomeServer(object):
def build_replication_streamer(self) -> ReplicationStreamer:
return ReplicationStreamer(self)
def build_replication_data_handler(self):
return ReplicationDataHandler(self.get_datastore())
def remove_pusher(self, app_id, push_key, user_id):
return self.get_pusherpool().remove_pusher(app_id, push_key, user_id)

7
synapse/server.pyi
View file

@ -19,6 +19,7 @@ import synapse.handlers.set_password
import synapse.http.client
import synapse.notifier
import synapse.replication.tcp.client
import synapse.replication.tcp.handler
import synapse.rest.media.v1.media_repository
import synapse.server_notices.server_notices_manager
import synapse.server_notices.server_notices_sender
@ -106,7 +107,11 @@ class HomeServer(object):
pass
def get_tcp_replication(
self,
) -> synapse.replication.tcp.client.ReplicationClientHandler:
) -> synapse.replication.tcp.handler.ReplicationCommandHandler:
pass
def get_replication_data_handler(
self,
) -> synapse.replication.tcp.client.ReplicationDataHandler:
pass
def get_federation_registry(
self,

15
tests/replication/slave/storage/_base.py
View file

@ -17,8 +17,9 @@ from mock import Mock, NonCallableMock
from synapse.replication.tcp.client import (
ReplicationClientFactory,
ReplicationClientHandler,
ReplicationDataHandler,
)
from synapse.replication.tcp.handler import ReplicationCommandHandler
from synapse.replication.tcp.resource import ReplicationStreamProtocolFactory
from synapse.storage.database import make_conn
@ -51,15 +52,19 @@ class BaseSlavedStoreTestCase(unittest.HomeserverTestCase):
self.event_id = 0
server_factory = ReplicationStreamProtocolFactory(self.hs)
self.streamer = server_factory.streamer
self.streamer = hs.get_replication_streamer()
handler_factory = Mock()
self.replication_handler = ReplicationClientHandler(self.slaved_store)
self.replication_handler.factory = handler_factory
# We now do some gut wrenching so that we have a client that is based
# off of the slave store rather than the main store.
self.replication_handler = ReplicationCommandHandler(self.hs)
self.replication_handler._replication_data_handler = ReplicationDataHandler(
self.slaved_store
)
client_factory = ReplicationClientFactory(
self.hs, "client_name", self.replication_handler
)
client_factory.handler = self.replication_handler
server = server_factory.buildProtocol(None)
client = client_factory.buildProtocol(None)

38
tests/replication/tcp/streams/_base.py
View file

@ -15,7 +15,7 @@
from mock import Mock
from synapse.replication.tcp.commands import ReplicateCommand
from synapse.replication.tcp.handler import ReplicationCommandHandler
from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
from synapse.replication.tcp.resource import ReplicationStreamProtocolFactory
@ -26,15 +26,20 @@ from tests.server import FakeTransport
class BaseStreamTestCase(unittest.HomeserverTestCase):
"""Base class for tests of the replication streams"""
def make_homeserver(self, reactor, clock):
self.test_handler = Mock(wraps=TestReplicationDataHandler())
return self.setup_test_homeserver(replication_data_handler=self.test_handler)
def prepare(self, reactor, clock, hs):
# build a replication server
server_factory = ReplicationStreamProtocolFactory(self.hs)
self.streamer = server_factory.streamer
server_factory = ReplicationStreamProtocolFactory(hs)
self.streamer = hs.get_replication_streamer()
self.server = server_factory.buildProtocol(None)
self.test_handler = Mock(wraps=TestReplicationClientHandler())
repl_handler = ReplicationCommandHandler(hs)
repl_handler.handler = self.test_handler
self.client = ClientReplicationStreamProtocol(
hs, "client", "test", clock, self.test_handler,
hs, "client", "test", clock, repl_handler,
)
self._client_transport = None
@ -69,13 +74,9 @@ class BaseStreamTestCase(unittest.HomeserverTestCase):
self.streamer.on_notifier_poke()
self.pump(0.1)
def replicate_stream(self):
"""Make the client end a REPLICATE command to set up a subscription to a stream"""
self.client.send_command(ReplicateCommand())
class TestReplicationClientHandler(object):
"""Drop-in for ReplicationClientHandler which just collects RDATA rows"""
class TestReplicationDataHandler:
"""Drop-in for ReplicationDataHandler which just collects RDATA rows"""
def __init__(self):
self.streams = set()
@ -88,18 +89,9 @@ class TestReplicationClientHandler(object):
positions[stream] = max(token, positions.get(stream, 0))
return positions
def get_currently_syncing_users(self):
return []
def update_connection(self, connection):
pass
def finished_connecting(self):
pass
async def on_position(self, stream_name, token):
"""Called when we get new position data."""
async def on_rdata(self, stream_name, token, rows):
for r in rows:
self._received_rdata_rows.append((stream_name, token, r))
async def on_position(self, stream_name, token):
pass

1
tests/replication/tcp/streams/test_receipts.py
View file

@ -24,7 +24,6 @@ class ReceiptsStreamTestCase(BaseStreamTestCase):
self.reconnect()
# make the client subscribe to the receipts stream
self.replicate_stream()
self.test_handler.streams.add("receipts")
# tell the master to send a new receipt