Move additional tasks to the background worker, part 4

changelog.d/8513.feature

@@ -0,0 +1 @@
+Allow running background tasks in a separate worker process.

synapse/handlers/account_validity.py

@@ -70,7 +70,8 @@ def send_emails():
                     "send_renewals", self._send_renewal_emails
                 )
 
-            self.clock.looping_call(send_emails, 30 * 60 * 1000)
+            if hs.config.run_background_tasks:
+                self.clock.looping_call(send_emails, 30 * 60 * 1000)
 
     async def _send_renewal_emails(self):
         """Gets the list of users whose account is expiring in the amount of time

synapse/handlers/deactivate_account.py

@@ -45,7 +45,7 @@ def __init__(self, hs: "HomeServer"):
 
         # Start the user parter loop so it can resume parting users from rooms where
         # it left off (if it has work left to do).
-        if hs.config.worker_app is None:
+        if hs.config.run_background_tasks:
             hs.get_reactor().callWhenRunning(self._start_user_parting)
 
         self._account_validity_enabled = hs.config.account_validity.enabled

synapse/handlers/message.py

@@ -402,21 +402,23 @@ def __init__(self, hs: "HomeServer"):
             self.config.block_events_without_consent_error
         )
 
+        # we need to construct a ConsentURIBuilder here, as it checks that the necessary
+        # config options, but *only* if we have a configuration for which we are
+        # going to need it.
+        if self._block_events_without_consent_error:
+            self._consent_uri_builder = ConsentURIBuilder(self.config)
+
         # Rooms which should be excluded from dummy insertion. (For instance,
         # those without local users who can send events into the room).
         #
         # map from room id to time-of-last-attempt.
         #
         self._rooms_to_exclude_from_dummy_event_insertion = {}  # type: Dict[str, int]
-
-        # we need to construct a ConsentURIBuilder here, as it checks that the necessary
-        # config options, but *only* if we have a configuration for which we are
-        # going to need it.
-        if self._block_events_without_consent_error:
-            self._consent_uri_builder = ConsentURIBuilder(self.config)
+        # The number of forward extremeities before a dummy event is sent.
+        self._dummy_events_threshold = hs.config.dummy_events_threshold
 
         if (
-            not self.config.worker_app
+            self.config.run_background_tasks
             and self.config.cleanup_extremities_with_dummy_events
         ):
             self.clock.looping_call(
@@ -431,8 +433,6 @@ def __init__(self, hs: "HomeServer"):
 
         self._ephemeral_events_enabled = hs.config.enable_ephemeral_messages
 
-        self._dummy_events_threshold = hs.config.dummy_events_threshold
-
     async def create_event(
         self,
         requester: Requester,

synapse/handlers/pagination.py

@@ -92,7 +92,7 @@ def __init__(self, hs: "HomeServer"):
         self._retention_allowed_lifetime_min = hs.config.retention_allowed_lifetime_min
         self._retention_allowed_lifetime_max = hs.config.retention_allowed_lifetime_max
 
-        if hs.config.retention_enabled:
+        if hs.config.run_background_tasks and hs.config.retention_enabled:
             # Run the purge jobs described in the configuration file.
             for job in hs.config.retention_purge_jobs:
                 logger.info("Setting up purge job with config: %s", job)

synapse/handlers/profile.py

@@ -35,14 +35,16 @@
 MAX_AVATAR_URL_LEN = 1000
 
 
-class BaseProfileHandler(BaseHandler):
+class ProfileHandler(BaseHandler):
     """Handles fetching and updating user profile information.
 
-    BaseProfileHandler can be instantiated directly on workers and will
-    delegate to master when necessary. The master process should use the
-    subclass MasterProfileHandler
+    ProfileHandler can be instantiated directly on workers and will
+    delegate to master when necessary.
     """
 
+    PROFILE_UPDATE_MS = 60 * 1000
+    PROFILE_UPDATE_EVERY_MS = 24 * 60 * 60 * 1000
+
     def __init__(self, hs):
         super().__init__(hs)
 
@@ -53,6 +55,11 @@ def __init__(self, hs):
 
         self.user_directory_handler = hs.get_user_directory_handler()
 
+        if hs.config.run_background_tasks:
+            self.clock.looping_call(
+                self._start_update_remote_profile_cache, self.PROFILE_UPDATE_MS
+            )
+
     async def get_profile(self, user_id):
         target_user = UserID.from_string(user_id)
 
@@ -363,20 +370,6 @@ async def check_profile_query_allowed(self, target_user, requester=None):
                 raise SynapseError(403, "Profile isn't available", Codes.FORBIDDEN)
             raise
 
-
-class MasterProfileHandler(BaseProfileHandler):
-    PROFILE_UPDATE_MS = 60 * 1000
-    PROFILE_UPDATE_EVERY_MS = 24 * 60 * 60 * 1000
-
-    def __init__(self, hs):
-        super().__init__(hs)
-
-        assert hs.config.worker_app is None
-
-        self.clock.looping_call(
-            self._start_update_remote_profile_cache, self.PROFILE_UPDATE_MS
-        )
-
     def _start_update_remote_profile_cache(self):
         return run_as_background_process(
             "Update remote profile", self._update_remote_profile_cache

synapse/server.py

@@ -75,7 +75,7 @@
 from synapse.handlers.pagination import PaginationHandler
 from synapse.handlers.password_policy import PasswordPolicyHandler
 from synapse.handlers.presence import PresenceHandler
-from synapse.handlers.profile import BaseProfileHandler, MasterProfileHandler
+from synapse.handlers.profile import ProfileHandler
 from synapse.handlers.read_marker import ReadMarkerHandler
 from synapse.handlers.receipts import ReceiptsHandler
 from synapse.handlers.register import RegistrationHandler
@@ -191,7 +191,12 @@ class HomeServer(metaclass=abc.ABCMeta):
     """
 
     REQUIRED_ON_BACKGROUND_TASK_STARTUP = [
+        "account_validity",
         "auth",
+        "deactivate_account",
+        "message",
+        "pagination",
+        "profile",
         "stats",
     ]
 
@@ -462,10 +467,7 @@ def get_initial_sync_handler(self) -> InitialSyncHandler:
 
     @cache_in_self
     def get_profile_handler(self):
-        if self.config.worker_app:
-            return BaseProfileHandler(self)
-        else:
-            return MasterProfileHandler(self)
+        return ProfileHandler(self)
 
     @cache_in_self
     def get_event_creation_handler(self) -> EventCreationHandler:

synapse/storage/databases/main/profile.py

@@ -91,27 +91,6 @@ async def set_profile_avatar_url(
             desc="set_profile_avatar_url",
         )
 
-
-class ProfileStore(ProfileWorkerStore):
-    async def add_remote_profile_cache(
-        self, user_id: str, displayname: str, avatar_url: str
-    ) -> None:
-        """Ensure we are caching the remote user's profiles.
-
-        This should only be called when `is_subscribed_remote_profile_for_user`
-        would return true for the user.
-        """
-        await self.db_pool.simple_upsert(
-            table="remote_profile_cache",
-            keyvalues={"user_id": user_id},
-            values={
-                "displayname": displayname,
-                "avatar_url": avatar_url,
-                "last_check": self._clock.time_msec(),
-            },
-            desc="add_remote_profile_cache",
-        )
-
     async def update_remote_profile_cache(
         self, user_id: str, displayname: str, avatar_url: str
     ) -> int:
@@ -138,6 +117,31 @@ async def maybe_delete_remote_profile_cache(self, user_id):
                 desc="delete_remote_profile_cache",
             )
 
+    async def is_subscribed_remote_profile_for_user(self, user_id):
+        """Check whether we are interested in a remote user's profile.
+        """
+        res = await self.db_pool.simple_select_one_onecol(
+            table="group_users",
+            keyvalues={"user_id": user_id},
+            retcol="user_id",
+            allow_none=True,
+            desc="should_update_remote_profile_cache_for_user",
+        )
+
+        if res:
+            return True
+
+        res = await self.db_pool.simple_select_one_onecol(
+            table="group_invites",
+            keyvalues={"user_id": user_id},
+            retcol="user_id",
+            allow_none=True,
+            desc="should_update_remote_profile_cache_for_user",
+        )
+
+        if res:
+            return True
+
     async def get_remote_profile_cache_entries_that_expire(
         self, last_checked: int
     ) -> Dict[str, str]:
@@ -160,27 +164,23 @@ def _get_remote_profile_cache_entries_that_expire_txn(txn):
             _get_remote_profile_cache_entries_that_expire_txn,
         )
 
-    async def is_subscribed_remote_profile_for_user(self, user_id):
-        """Check whether we are interested in a remote user's profile.
-        """
-        res = await self.db_pool.simple_select_one_onecol(
-            table="group_users",
-            keyvalues={"user_id": user_id},
-            retcol="user_id",
-            allow_none=True,
-            desc="should_update_remote_profile_cache_for_user",
-        )
 
-        if res:
-            return True
+class ProfileStore(ProfileWorkerStore):
+    async def add_remote_profile_cache(
+        self, user_id: str, displayname: str, avatar_url: str
+    ) -> None:
+        """Ensure we are caching the remote user's profiles.
 
-        res = await self.db_pool.simple_select_one_onecol(
-            table="group_invites",
+        This should only be called when `is_subscribed_remote_profile_for_user`
+        would return true for the user.
+        """
+        await self.db_pool.simple_upsert(
+            table="remote_profile_cache",
             keyvalues={"user_id": user_id},
-            retcol="user_id",
-            allow_none=True,
-            desc="should_update_remote_profile_cache_for_user",
+            values={
+                "displayname": displayname,
+                "avatar_url": avatar_url,
+                "last_check": self._clock.time_msec(),
+            },
+            desc="add_remote_profile_cache",
         )
-
-        if res:
-            return True

synapse/storage/databases/main/registration.py

@@ -862,6 +862,32 @@ def set_expiration_date_for_user_txn(self, txn, user_id, use_delta=False):
             values={"expiration_ts_ms": expiration_ts, "email_sent": False},
         )
 
+    async def get_user_pending_deactivation(self) -> Optional[str]:
+        """
+        Gets one user from the table of users waiting to be parted from all the rooms
+        they're in.
+        """
+        return await self.db_pool.simple_select_one_onecol(
+            "users_pending_deactivation",
+            keyvalues={},
+            retcol="user_id",
+            allow_none=True,
+            desc="get_users_pending_deactivation",
+        )
+
+    async def del_user_pending_deactivation(self, user_id: str) -> None:
+        """
+        Removes the given user to the table of users who need to be parted from all the
+        rooms they're in, effectively marking that user as fully deactivated.
+        """
+        # XXX: This should be simple_delete_one but we failed to put a unique index on
+        # the table, so somehow duplicate entries have ended up in it.
+        await self.db_pool.simple_delete(
+            "users_pending_deactivation",
+            keyvalues={"user_id": user_id},
+            desc="del_user_pending_deactivation",
+        )
+
 
 class RegistrationBackgroundUpdateStore(RegistrationWorkerStore):
     def __init__(self, database: DatabasePool, db_conn, hs):
@@ -1367,32 +1393,6 @@ async def add_user_pending_deactivation(self, user_id: str) -> None:
             desc="add_user_pending_deactivation",
         )
 
-    async def del_user_pending_deactivation(self, user_id: str) -> None:
-        """
-        Removes the given user to the table of users who need to be parted from all the
-        rooms they're in, effectively marking that user as fully deactivated.
-        """
-        # XXX: This should be simple_delete_one but we failed to put a unique index on
-        # the table, so somehow duplicate entries have ended up in it.
-        await self.db_pool.simple_delete(
-            "users_pending_deactivation",
-            keyvalues={"user_id": user_id},
-            desc="del_user_pending_deactivation",
-        )
-
-    async def get_user_pending_deactivation(self) -> Optional[str]:
-        """
-        Gets one user from the table of users waiting to be parted from all the rooms
-        they're in.
-        """
-        return await self.db_pool.simple_select_one_onecol(
-            "users_pending_deactivation",
-            keyvalues={},
-            retcol="user_id",
-            allow_none=True,
-            desc="get_users_pending_deactivation",
-        )
-
     async def validate_threepid_session(
         self, session_id: str, client_secret: str, token: str, current_ts: int
     ) -> Optional[str]: