Merge pull request #1118 from matrix-org/erikj/public_rooms_splitout

Split out public room list into a worker process

4 files changed, 401 insertions, 159 deletions

diff --git a/synapse/app/client_reader.py b/synapse/app/client_reader.py
new file mode 100644
index 0000000000..f356f5fbd4
--- /dev/null
+++ b/synapse/app/client_reader.py
@@ -0,0 +1,215 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright 2016 OpenMarket 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.
+
+import synapse
+
+from synapse.config._base import ConfigError
+from synapse.config.homeserver import HomeServerConfig
+from synapse.config.logger import setup_logging
+from synapse.http.site import SynapseSite
+from synapse.http.server import JsonResource
+from synapse.metrics.resource import MetricsResource, METRICS_PREFIX
+from synapse.replication.slave.storage._base import BaseSlavedStore
+from synapse.replication.slave.storage.appservice import SlavedApplicationServiceStore
+from synapse.replication.slave.storage.events import SlavedEventStore
+from synapse.replication.slave.storage.keys import SlavedKeyStore
+from synapse.replication.slave.storage.room import RoomStore
+from synapse.replication.slave.storage.directory import DirectoryStore
+from synapse.replication.slave.storage.registration import SlavedRegistrationStore
+from synapse.rest.client.v1.room import PublicRoomListRestServlet
+from synapse.server import HomeServer
+from synapse.storage.client_ips import ClientIpStore
+from synapse.storage.engines import create_engine
+from synapse.util.async import sleep
+from synapse.util.httpresourcetree import create_resource_tree
+from synapse.util.logcontext import LoggingContext
+from synapse.util.manhole import manhole
+from synapse.util.rlimit import change_resource_limit
+from synapse.util.versionstring import get_version_string
+from synapse.crypto import context_factory
+
+
+from twisted.internet import reactor, defer
+from twisted.web.resource import Resource
+
+from daemonize import Daemonize
+
+import sys
+import logging
+import gc
+
+logger = logging.getLogger("synapse.app.federation_reader")
+
+
+class ClientReaderSlavedStore(
+    SlavedEventStore,
+    SlavedKeyStore,
+    RoomStore,
+    DirectoryStore,
+    SlavedApplicationServiceStore,
+    SlavedRegistrationStore,
+    BaseSlavedStore,
+    ClientIpStore,  # After BaseSlavedStore because the constructor is different
+):
+    pass
+
+
+class ClientReaderServer(HomeServer):
+    def get_db_conn(self, run_new_connection=True):
+        # Any param beginning with cp_ is a parameter for adbapi, and should
+        # not be passed to the database engine.
+        db_params = {
+            k: v for k, v in self.db_config.get("args", {}).items()
+            if not k.startswith("cp_")
+        }
+        db_conn = self.database_engine.module.connect(**db_params)
+
+        if run_new_connection:
+            self.database_engine.on_new_connection(db_conn)
+        return db_conn
+
+    def setup(self):
+        logger.info("Setting up.")
+        self.datastore = ClientReaderSlavedStore(self.get_db_conn(), self)
+        logger.info("Finished setting up.")
+
+    def _listen_http(self, listener_config):
+        port = listener_config["port"]
+        bind_address = listener_config.get("bind_address", "")
+        site_tag = listener_config.get("tag", port)
+        resources = {}
+        for res in listener_config["resources"]:
+            for name in res["names"]:
+                if name == "metrics":
+                    resources[METRICS_PREFIX] = MetricsResource(self)
+                elif name == "client":
+                    resource = JsonResource(self, canonical_json=False)
+                    PublicRoomListRestServlet(self).register(resource)
+                    resources.update({
+                        "/_matrix/client/r0": resource,
+                        "/_matrix/client/unstable": resource,
+                        "/_matrix/client/v2_alpha": resource,
+                        "/_matrix/client/api/v1": resource,
+                    })
+
+        root_resource = create_resource_tree(resources, Resource())
+        reactor.listenTCP(
+            port,
+            SynapseSite(
+                "synapse.access.http.%s" % (site_tag,),
+                site_tag,
+                listener_config,
+                root_resource,
+            ),
+            interface=bind_address
+        )
+        logger.info("Synapse client reader now listening on port %d", port)
+
+    def start_listening(self, listeners):
+        for listener in listeners:
+            if listener["type"] == "http":
+                self._listen_http(listener)
+            elif listener["type"] == "manhole":
+                reactor.listenTCP(
+                    listener["port"],
+                    manhole(
+                        username="matrix",
+                        password="rabbithole",
+                        globals={"hs": self},
+                    ),
+                    interface=listener.get("bind_address", '127.0.0.1')
+                )
+            else:
+                logger.warn("Unrecognized listener type: %s", listener["type"])
+
+    @defer.inlineCallbacks
+    def replicate(self):
+        http_client = self.get_simple_http_client()
+        store = self.get_datastore()
+        replication_url = self.config.worker_replication_url
+
+        while True:
+            try:
+                args = store.stream_positions()
+                args["timeout"] = 30000
+                result = yield http_client.get_json(replication_url, args=args)
+                yield store.process_replication(result)
+            except:
+                logger.exception("Error replicating from %r", replication_url)
+                yield sleep(5)
+
+
+def start(config_options):
+    try:
+        config = HomeServerConfig.load_config(
+            "Synapse client reader", config_options
+        )
+    except ConfigError as e:
+        sys.stderr.write("\n" + e.message + "\n")
+        sys.exit(1)
+
+    assert config.worker_app == "synapse.app.client_reader"
+
+    setup_logging(config.worker_log_config, config.worker_log_file)
+
+    database_engine = create_engine(config.database_config)
+
+    tls_server_context_factory = context_factory.ServerContextFactory(config)
+
+    ss = ClientReaderServer(
+        config.server_name,
+        db_config=config.database_config,
+        tls_server_context_factory=tls_server_context_factory,
+        config=config,
+        version_string="Synapse/" + get_version_string(synapse),
+        database_engine=database_engine,
+    )
+
+    ss.setup()
+    ss.get_handlers()
+    ss.start_listening(config.worker_listeners)
+
+    def run():
+        with LoggingContext("run"):
+            logger.info("Running")
+            change_resource_limit(config.soft_file_limit)
+            if config.gc_thresholds:
+                gc.set_threshold(*config.gc_thresholds)
+            reactor.run()
+
+    def start():
+        ss.get_datastore().start_profiling()
+        ss.replicate()
+
+    reactor.callWhenRunning(start)
+
+    if config.worker_daemonize:
+        daemon = Daemonize(
+            app="synapse-client-reader",
+            pid=config.worker_pid_file,
+            action=run,
+            auto_close_fds=False,
+            verbose=True,
+            logger=logger,
+        )
+        daemon.start()
+    else:
+        run()
+
+
+if __name__ == '__main__':
+    with LoggingContext("main"):
+        start(sys.argv[1:])
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index d40ada60c1..cbd26f8f95 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -20,12 +20,10 @@ from ._base import BaseHandler
 
 from synapse.types import UserID, RoomAlias, RoomID, RoomStreamToken
 from synapse.api.constants import (
-    EventTypes, JoinRules, RoomCreationPreset, Membership,
+    EventTypes, JoinRules, RoomCreationPreset
 )
 from synapse.api.errors import AuthError, StoreError, SynapseError
 from synapse.util import stringutils
-from synapse.util.async import concurrently_execute
-from synapse.util.caches.response_cache import ResponseCache
 from synapse.visibility import filter_events_for_client
 
 from collections import OrderedDict
@@ -36,8 +34,6 @@ import string
 
 logger = logging.getLogger(__name__)
 
-REMOTE_ROOM_LIST_POLL_INTERVAL = 60 * 1000
-
 id_server_scheme = "https://"
 
 
@@ -348,159 +344,6 @@ class RoomCreationHandler(BaseHandler):
             )
 
 
-class RoomListHandler(BaseHandler):
-    def __init__(self, hs):
-        super(RoomListHandler, self).__init__(hs)
-        self.response_cache = ResponseCache(hs)
-        self.remote_list_request_cache = ResponseCache(hs)
-        self.remote_list_cache = {}
-        self.fetch_looping_call = hs.get_clock().looping_call(
-            self.fetch_all_remote_lists, REMOTE_ROOM_LIST_POLL_INTERVAL
-        )
-        self.fetch_all_remote_lists()
-
-    def get_local_public_room_list(self):
-        result = self.response_cache.get(())
-        if not result:
-            result = self.response_cache.set((), self._get_public_room_list())
-        return result
-
-    @defer.inlineCallbacks
-    def _get_public_room_list(self):
-        room_ids = yield self.store.get_public_room_ids()
-
-        results = []
-
-        @defer.inlineCallbacks
-        def handle_room(room_id):
-            current_state = yield self.state_handler.get_current_state(room_id)
-
-            # Double check that this is actually a public room.
-            join_rules_event = current_state.get((EventTypes.JoinRules, ""))
-            if join_rules_event:
-                join_rule = join_rules_event.content.get("join_rule", None)
-                if join_rule and join_rule != JoinRules.PUBLIC:
-                    defer.returnValue(None)
-
-            result = {"room_id": room_id}
-
-            num_joined_users = len([
-                1 for _, event in current_state.items()
-                if event.type == EventTypes.Member
-                and event.membership == Membership.JOIN
-            ])
-            if num_joined_users == 0:
-                return
-
-            result["num_joined_members"] = num_joined_users
-
-            aliases = yield self.store.get_aliases_for_room(room_id)
-            if aliases:
-                result["aliases"] = aliases
-
-            name_event = yield current_state.get((EventTypes.Name, ""))
-            if name_event:
-                name = name_event.content.get("name", None)
-                if name:
-                    result["name"] = name
-
-            topic_event = current_state.get((EventTypes.Topic, ""))
-            if topic_event:
-                topic = topic_event.content.get("topic", None)
-                if topic:
-                    result["topic"] = topic
-
-            canonical_event = current_state.get((EventTypes.CanonicalAlias, ""))
-            if canonical_event:
-                canonical_alias = canonical_event.content.get("alias", None)
-                if canonical_alias:
-                    result["canonical_alias"] = canonical_alias
-
-            visibility_event = current_state.get((EventTypes.RoomHistoryVisibility, ""))
-            visibility = None
-            if visibility_event:
-                visibility = visibility_event.content.get("history_visibility", None)
-            result["world_readable"] = visibility == "world_readable"
-
-            guest_event = current_state.get((EventTypes.GuestAccess, ""))
-            guest = None
-            if guest_event:
-                guest = guest_event.content.get("guest_access", None)
-            result["guest_can_join"] = guest == "can_join"
-
-            avatar_event = current_state.get(("m.room.avatar", ""))
-            if avatar_event:
-                avatar_url = avatar_event.content.get("url", None)
-                if avatar_url:
-                    result["avatar_url"] = avatar_url
-
-            results.append(result)
-
-        yield concurrently_execute(handle_room, room_ids, 10)
-
-        # FIXME (erikj): START is no longer a valid value
-        defer.returnValue({"start": "START", "end": "END", "chunk": results})
-
-    @defer.inlineCallbacks
-    def fetch_all_remote_lists(self):
-        deferred = self.hs.get_replication_layer().get_public_rooms(
-            self.hs.config.secondary_directory_servers
-        )
-        self.remote_list_request_cache.set((), deferred)
-        self.remote_list_cache = yield deferred
-
-    @defer.inlineCallbacks
-    def get_remote_public_room_list(self, server_name):
-        res = yield self.hs.get_replication_layer().get_public_rooms(
-            [server_name]
-        )
-
-        if server_name not in res:
-            raise SynapseError(404, "Server not found")
-        defer.returnValue(res[server_name])
-
-    @defer.inlineCallbacks
-    def get_aggregated_public_room_list(self):
-        """
-        Get the public room list from this server and the servers
-        specified in the secondary_directory_servers config option.
-        XXX: Pagination...
-        """
-        # We return the results from out cache which is updated by a looping call,
-        # unless we're missing a cache entry, in which case wait for the result
-        # of the fetch if there's one in progress. If not, omit that server.
-        wait = False
-        for s in self.hs.config.secondary_directory_servers:
-            if s not in self.remote_list_cache:
-                logger.warn("No cached room list from %s: waiting for fetch", s)
-                wait = True
-                break
-
-        if wait and self.remote_list_request_cache.get(()):
-            yield self.remote_list_request_cache.get(())
-
-        public_rooms = yield self.get_local_public_room_list()
-
-        # keep track of which room IDs we've seen so we can de-dup
-        room_ids = set()
-
-        # tag all the ones in our list with our server name.
-        # Also add the them to the de-deping set
-        for room in public_rooms['chunk']:
-            room["server_name"] = self.hs.hostname
-            room_ids.add(room["room_id"])
-
-        # Now add the results from federation
-        for server_name, server_result in self.remote_list_cache.items():
-            for room in server_result["chunk"]:
-                if room["room_id"] not in room_ids:
-                    room["server_name"] = server_name
-                    public_rooms["chunk"].append(room)
-                    room_ids.add(room["room_id"])
-
-        defer.returnValue(public_rooms)
-
-
 class RoomContextHandler(BaseHandler):
     @defer.inlineCallbacks
     def get_event_context(self, user, room_id, event_id, limit, is_guest):
diff --git a/synapse/handlers/room_list.py b/synapse/handlers/room_list.py
new file mode 100644
index 0000000000..d72e8c99f9
--- /dev/null
+++ b/synapse/handlers/room_list.py
@@ -0,0 +1,184 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014 - 2016 OpenMarket 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.
+
+from twisted.internet import defer
+
+from ._base import BaseHandler
+
+from synapse.api.constants import (
+    EventTypes, JoinRules, Membership,
+)
+from synapse.api.errors import SynapseError
+from synapse.util.async import concurrently_execute
+from synapse.util.caches.response_cache import ResponseCache
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+REMOTE_ROOM_LIST_POLL_INTERVAL = 60 * 1000
+
+
+class RoomListHandler(BaseHandler):
+    def __init__(self, hs):
+        super(RoomListHandler, self).__init__(hs)
+        self.response_cache = ResponseCache(hs)
+        self.remote_list_request_cache = ResponseCache(hs)
+        self.remote_list_cache = {}
+        self.fetch_looping_call = hs.get_clock().looping_call(
+            self.fetch_all_remote_lists, REMOTE_ROOM_LIST_POLL_INTERVAL
+        )
+        self.fetch_all_remote_lists()
+
+    def get_local_public_room_list(self):
+        result = self.response_cache.get(())
+        if not result:
+            result = self.response_cache.set((), self._get_public_room_list())
+        return result
+
+    @defer.inlineCallbacks
+    def _get_public_room_list(self):
+        room_ids = yield self.store.get_public_room_ids()
+
+        results = []
+
+        @defer.inlineCallbacks
+        def handle_room(room_id):
+            current_state = yield self.state_handler.get_current_state(room_id)
+
+            # Double check that this is actually a public room.
+            join_rules_event = current_state.get((EventTypes.JoinRules, ""))
+            if join_rules_event:
+                join_rule = join_rules_event.content.get("join_rule", None)
+                if join_rule and join_rule != JoinRules.PUBLIC:
+                    defer.returnValue(None)
+
+            result = {"room_id": room_id}
+
+            num_joined_users = len([
+                1 for _, event in current_state.items()
+                if event.type == EventTypes.Member
+                and event.membership == Membership.JOIN
+            ])
+            if num_joined_users == 0:
+                return
+
+            result["num_joined_members"] = num_joined_users
+
+            aliases = yield self.store.get_aliases_for_room(room_id)
+            if aliases:
+                result["aliases"] = aliases
+
+            name_event = yield current_state.get((EventTypes.Name, ""))
+            if name_event:
+                name = name_event.content.get("name", None)
+                if name:
+                    result["name"] = name
+
+            topic_event = current_state.get((EventTypes.Topic, ""))
+            if topic_event:
+                topic = topic_event.content.get("topic", None)
+                if topic:
+                    result["topic"] = topic
+
+            canonical_event = current_state.get((EventTypes.CanonicalAlias, ""))
+            if canonical_event:
+                canonical_alias = canonical_event.content.get("alias", None)
+                if canonical_alias:
+                    result["canonical_alias"] = canonical_alias
+
+            visibility_event = current_state.get((EventTypes.RoomHistoryVisibility, ""))
+            visibility = None
+            if visibility_event:
+                visibility = visibility_event.content.get("history_visibility", None)
+            result["world_readable"] = visibility == "world_readable"
+
+            guest_event = current_state.get((EventTypes.GuestAccess, ""))
+            guest = None
+            if guest_event:
+                guest = guest_event.content.get("guest_access", None)
+            result["guest_can_join"] = guest == "can_join"
+
+            avatar_event = current_state.get(("m.room.avatar", ""))
+            if avatar_event:
+                avatar_url = avatar_event.content.get("url", None)
+                if avatar_url:
+                    result["avatar_url"] = avatar_url
+
+            results.append(result)
+
+        yield concurrently_execute(handle_room, room_ids, 10)
+
+        # FIXME (erikj): START is no longer a valid value
+        defer.returnValue({"start": "START", "end": "END", "chunk": results})
+
+    @defer.inlineCallbacks
+    def fetch_all_remote_lists(self):
+        deferred = self.hs.get_replication_layer().get_public_rooms(
+            self.hs.config.secondary_directory_servers
+        )
+        self.remote_list_request_cache.set((), deferred)
+        self.remote_list_cache = yield deferred
+
+    @defer.inlineCallbacks
+    def get_remote_public_room_list(self, server_name):
+        res = yield self.hs.get_replication_layer().get_public_rooms(
+            [server_name]
+        )
+
+        if server_name not in res:
+            raise SynapseError(404, "Server not found")
+        defer.returnValue(res[server_name])
+
+    @defer.inlineCallbacks
+    def get_aggregated_public_room_list(self):
+        """
+        Get the public room list from this server and the servers
+        specified in the secondary_directory_servers config option.
+        XXX: Pagination...
+        """
+        # We return the results from out cache which is updated by a looping call,
+        # unless we're missing a cache entry, in which case wait for the result
+        # of the fetch if there's one in progress. If not, omit that server.
+        wait = False
+        for s in self.hs.config.secondary_directory_servers:
+            if s not in self.remote_list_cache:
+                logger.warn("No cached room list from %s: waiting for fetch", s)
+                wait = True
+                break
+
+        if wait and self.remote_list_request_cache.get(()):
+            yield self.remote_list_request_cache.get(())
+
+        public_rooms = yield self.get_local_public_room_list()
+
+        # keep track of which room IDs we've seen so we can de-dup
+        room_ids = set()
+
+        # tag all the ones in our list with our server name.
+        # Also add the them to the de-deping set
+        for room in public_rooms['chunk']:
+            room["server_name"] = self.hs.hostname
+            room_ids.add(room["room_id"])
+
+        # Now add the results from federation
+        for server_name, server_result in self.remote_list_cache.items():
+            for room in server_result["chunk"]:
+                if room["room_id"] not in room_ids:
+                    room["server_name"] = server_name
+                    public_rooms["chunk"].append(room)
+                    room_ids.add(room["room_id"])
+
+        defer.returnValue(public_rooms)
diff --git a/synapse/server.py b/synapse/server.py
index f516f08167..69860f3d82 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -39,7 +39,7 @@ from synapse.handlers.devicemessage import DeviceMessageHandler
 from synapse.handlers.device import DeviceHandler
 from synapse.handlers.e2e_keys import E2eKeysHandler
 from synapse.handlers.presence import PresenceHandler
-from synapse.handlers.room import RoomListHandler
+from synapse.handlers.room_list import RoomListHandler
 from synapse.handlers.sync import SyncHandler
 from synapse.handlers.typing import TypingHandler
 from synapse.handlers.events import EventHandler, EventStreamHandler