Split out a separate app for handling /sync requests

synapse/app/synchrotron.py

@@ -0,0 +1,223 @@
+#!/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.api.urls import CLIENT_PREFIX
+from synapse.config._base import ConfigError
+from synapse.config.database import DatabaseConfig
+from synapse.config.logger import LoggingConfig
+from synapse.http.site import SynapseSite
+from synapse.http.server import JsonResource
+from synapse.metrics.resource import MetricsResource, METRICS_PREFIX
+from synapse.rest.client.v2_alpha import sync
+from synapse.replication.slave.storage.events import SlavedEventStore
+from synapse.replication.slave.storage.receipts import SlavedReceiptsStore
+from synapse.replication.slave.storage.account_data import SlavedAccountDataStore
+from synapse.server import HomeServer
+from synapse.storage.engines import create_engine
+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 twisted.internet import reactor
+from twisted.web.resource import Resource
+
+from daemonize import Daemonize
+
+import sys
+import logging
+
+logger = logging.getLogger("synapse.app.synchrotron")
+
+
+class SynchrotronConfig(DatabaseConfig, LoggingConfig):
+    def read_config(self, config):
+        self.replication_url = config["replication_url"]
+        self.server_name = config["server_name"]
+        self.listeners = config["listeners"]
+        self.soft_file_limit = config.get("soft_file_limit")
+        self.daemonize = config.get("daemonize")
+        self.pid_file = self.abspath(config.get("pid_file"))
+
+    def default_config(self, server_name, **kwargs):
+        pid_file = self.abspath("synchroton.pid")
+        return """\
+        # Slave configuration
+
+        # The replication listener on the synapse to talk to.
+        #replication_url: https://localhost:{replication_port}/_synapse/replication
+
+        server_name: "%(server_name)s"
+
+        listeners:
+        # Enable a /sync listener on the synchrontron
+        #- type: http
+        #    port: {http_port}
+        #    bind_address: ""
+        # Enable a ssh manhole listener on the synchrotron
+        # - type: manhole
+        #   port: {manhole_port}
+        #   bind_address: 127.0.0.1
+        # Enable a metric listener on the synchrotron
+        # - type: http
+        #   port: {metrics_port}
+        #   bind_address: 127.0.0.1
+        #   resources:
+        #    - names: ["metrics"]
+        #      compress: False
+
+        report_stats: False
+
+        daemonize: False
+
+        pid_file: %(pid_file)s
+        """ % locals()
+
+
+class SynchrotronSlavedStore(
+    SlavedEventStore,
+    SlavedReceiptsStore,
+    SlavedAccountDataStore,
+):
+    pass
+
+
+class SynchrotronServer(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 = SynchrotronSlavedStore(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)
+                    sync.register_servlets(self, resource)
+                    resources[CLIENT_PREFIX] = 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 synchrotron now listening on port %d", port)
+
+    def start_listening(self):
+        for listener in self.config.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"])
+
+
+def setup(config_options):
+    try:
+        config = SynchrotronConfig.load_config(
+            "Synapse synchrotron", config_options
+        )
+    except ConfigError as e:
+        sys.stderr.write("\n" + e.message + "\n")
+        sys.exit(1)
+
+    if not config:
+        sys.exit(0)
+
+    config.setup_logging()
+
+    database_engine = create_engine(config.database_config)
+
+    ss = SynchrotronServer(
+        config.server_name,
+        db_config=config.database_config,
+        config=config,
+        version_string=get_version_string("Synapse", synapse),
+        database_engine=database_engine,
+    )
+
+    ss.setup()
+    ss.start_listening()
+
+    change_resource_limit(ss.config.soft_file_limit)
+
+    def start():
+        ss.get_datastore().start_profiling()
+
+    reactor.callWhenRunning(start)
+
+    return ps
+
+
+if __name__ == '__main__':
+    with LoggingContext("main"):
+        ps = setup(sys.argv[1:])
+
+        if ps.config.daemonize:
+            def run():
+                with LoggingContext("run"):
+                    change_resource_limit(ps.config.soft_file_limit)
+                    reactor.run()
+
+            daemon = Daemonize(
+                app="synapse-pusher",
+                pid=ps.config.pid_file,
+                action=run,
+                auto_close_fds=False,
+                verbose=True,
+                logger=logger,
+            )
+
+            daemon.start()
+        else:
+            reactor.run()