Merge branch 'release-v0.22.0' of github.com:matrix-org/synapse v0.22.0

7 files changed, 409 insertions, 108 deletions

diff --git a/synapse/push/action_generator.py b/synapse/push/action_generator.py
index 3f75d3f921..fe09d50d55 100644
--- a/synapse/push/action_generator.py
+++ b/synapse/push/action_generator.py
@@ -15,7 +15,7 @@
 
 from twisted.internet import defer
 
-from .bulk_push_rule_evaluator import evaluator_for_event
+from .bulk_push_rule_evaluator import BulkPushRuleEvaluator
 
 from synapse.util.metrics import Measure
 
@@ -24,11 +24,12 @@ import logging
 logger = logging.getLogger(__name__)
 
 
-class ActionGenerator:
+class ActionGenerator(object):
     def __init__(self, hs):
         self.hs = hs
         self.clock = hs.get_clock()
         self.store = hs.get_datastore()
+        self.bulk_evaluator = BulkPushRuleEvaluator(hs)
         # really we want to get all user ids and all profile tags too,
         # since we want the actions for each profile tag for every user and
         # also actions for a client with no profile tag for each user.
@@ -38,16 +39,11 @@ class ActionGenerator:
 
     @defer.inlineCallbacks
     def handle_push_actions_for_event(self, event, context):
-        with Measure(self.clock, "evaluator_for_event"):
-            bulk_evaluator = yield evaluator_for_event(
-                event, self.hs, self.store, context
-            )
-
         with Measure(self.clock, "action_for_event_by_user"):
-            actions_by_user = yield bulk_evaluator.action_for_event_by_user(
+            actions_by_user = yield self.bulk_evaluator.action_for_event_by_user(
                 event, context
             )
 
         context.push_actions = [
-            (uid, actions) for uid, actions in actions_by_user.items()
+            (uid, actions) for uid, actions in actions_by_user.iteritems()
         ]
diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index f943ff640f..9a96e6fe8f 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -19,60 +19,83 @@ from twisted.internet import defer
 
 from .push_rule_evaluator import PushRuleEvaluatorForEvent
 
-from synapse.api.constants import EventTypes
 from synapse.visibility import filter_events_for_clients_context
+from synapse.api.constants import EventTypes, Membership
+from synapse.util.caches.descriptors import cached
+from synapse.util.async import Linearizer
 
+from collections import namedtuple
 
-logger = logging.getLogger(__name__)
 
+logger = logging.getLogger(__name__)
 
-@defer.inlineCallbacks
-def evaluator_for_event(event, hs, store, context):
-    rules_by_user = yield store.bulk_get_push_rules_for_room(
-        event, context
-    )
-
-    # if this event is an invite event, we may need to run rules for the user
-    # who's been invited, otherwise they won't get told they've been invited
-    if event.type == 'm.room.member' and event.content['membership'] == 'invite':
-        invited_user = event.state_key
-        if invited_user and hs.is_mine_id(invited_user):
-            has_pusher = yield store.user_has_pusher(invited_user)
-            if has_pusher:
-                rules_by_user = dict(rules_by_user)
-                rules_by_user[invited_user] = yield store.get_push_rules_for_user(
-                    invited_user
-                )
 
-    defer.returnValue(BulkPushRuleEvaluator(
-        event.room_id, rules_by_user, store
-    ))
+rules_by_room = {}
 
 
-class BulkPushRuleEvaluator:
+class BulkPushRuleEvaluator(object):
+    """Calculates the outcome of push rules for an event for all users in the
+    room at once.
     """
-    Runs push rules for all users in a room.
-    This is faster than running PushRuleEvaluator for each user because it
-    fetches all the rules for all the users in one (batched) db query
-    rather than doing multiple queries per-user. It currently uses
-    the same logic to run the actual rules, but could be optimised further
-    (see https://matrix.org/jira/browse/SYN-562)
-    """
-    def __init__(self, room_id, rules_by_user, store):
-        self.room_id = room_id
-        self.rules_by_user = rules_by_user
-        self.store = store
+
+    def __init__(self, hs):
+        self.hs = hs
+        self.store = hs.get_datastore()
+
+    @defer.inlineCallbacks
+    def _get_rules_for_event(self, event, context):
+        """This gets the rules for all users in the room at the time of the event,
+        as well as the push rules for the invitee if the event is an invite.
+
+        Returns:
+            dict of user_id -> push_rules
+        """
+        room_id = event.room_id
+        rules_for_room = self._get_rules_for_room(room_id)
+
+        rules_by_user = yield rules_for_room.get_rules(event, context)
+
+        # if this event is an invite event, we may need to run rules for the user
+        # who's been invited, otherwise they won't get told they've been invited
+        if event.type == 'm.room.member' and event.content['membership'] == 'invite':
+            invited = event.state_key
+            if invited and self.hs.is_mine_id(invited):
+                has_pusher = yield self.store.user_has_pusher(invited)
+                if has_pusher:
+                    rules_by_user = dict(rules_by_user)
+                    rules_by_user[invited] = yield self.store.get_push_rules_for_user(
+                        invited
+                    )
+
+        defer.returnValue(rules_by_user)
+
+    @cached()
+    def _get_rules_for_room(self, room_id):
+        """Get the current RulesForRoom object for the given room id
+
+        Returns:
+            RulesForRoom
+        """
+        # It's important that RulesForRoom gets added to self._get_rules_for_room.cache
+        # before any lookup methods get called on it as otherwise there may be
+        # a race if invalidate_all gets called (which assumes its in the cache)
+        return RulesForRoom(self.hs, room_id, self._get_rules_for_room.cache)
 
     @defer.inlineCallbacks
     def action_for_event_by_user(self, event, context):
+        """Given an event and context, evaluate the push rules and return
+        the results
+
+        Returns:
+            dict of user_id -> action
+        """
+        rules_by_user = yield self._get_rules_for_event(event, context)
         actions_by_user = {}
 
         # None of these users can be peeking since this list of users comes
         # from the set of users in the room, so we know for sure they're all
         # actually in the room.
-        user_tuples = [
-            (u, False) for u in self.rules_by_user.keys()
-        ]
+        user_tuples = [(u, False) for u in rules_by_user]
 
         filtered_by_user = yield filter_events_for_clients_context(
             self.store, user_tuples, [event], {event.event_id: context}
@@ -86,7 +109,7 @@ class BulkPushRuleEvaluator:
 
         condition_cache = {}
 
-        for uid, rules in self.rules_by_user.items():
+        for uid, rules in rules_by_user.iteritems():
             display_name = None
             profile_info = room_members.get(uid)
             if profile_info:
@@ -138,3 +161,240 @@ def _condition_checker(evaluator, conditions, uid, display_name, cache):
             return False
 
     return True
+
+
+class RulesForRoom(object):
+    """Caches push rules for users in a room.
+
+    This efficiently handles users joining/leaving the room by not invalidating
+    the entire cache for the room.
+    """
+
+    def __init__(self, hs, room_id, rules_for_room_cache):
+        """
+        Args:
+            hs (HomeServer)
+            room_id (str)
+            rules_for_room_cache(Cache): The cache object that caches these
+                RoomsForUser objects.
+        """
+        self.room_id = room_id
+        self.is_mine_id = hs.is_mine_id
+        self.store = hs.get_datastore()
+
+        self.linearizer = Linearizer(name="rules_for_room")
+
+        self.member_map = {}  # event_id -> (user_id, state)
+        self.rules_by_user = {}  # user_id -> rules
+
+        # The last state group we updated the caches for. If the state_group of
+        # a new event comes along, we know that we can just return the cached
+        # result.
+        # On invalidation of the rules themselves (if the user changes them),
+        # we invalidate everything and set state_group to `object()`
+        self.state_group = object()
+
+        # A sequence number to keep track of when we're allowed to update the
+        # cache. We bump the sequence number when we invalidate the cache. If
+        # the sequence number changes while we're calculating stuff we should
+        # not update the cache with it.
+        self.sequence = 0
+
+        # A cache of user_ids that we *know* aren't interesting, e.g. user_ids
+        # owned by AS's, or remote users, etc. (I.e. users we will never need to
+        # calculate push for)
+        # These never need to be invalidated as we will never set up push for
+        # them.
+        self.uninteresting_user_set = set()
+
+        # We need to be clever on the invalidating caches callbacks, as
+        # otherwise the invalidation callback holds a reference to the object,
+        # potentially causing it to leak.
+        # To get around this we pass a function that on invalidations looks ups
+        # the RoomsForUser entry in the cache, rather than keeping a reference
+        # to self around in the callback.
+        self.invalidate_all_cb = _Invalidation(rules_for_room_cache, room_id)
+
+    @defer.inlineCallbacks
+    def get_rules(self, event, context):
+        """Given an event context return the rules for all users who are
+        currently in the room.
+        """
+        state_group = context.state_group
+
+        with (yield self.linearizer.queue(())):
+            if state_group and self.state_group == state_group:
+                logger.debug("Using cached rules for %r", self.room_id)
+                defer.returnValue(self.rules_by_user)
+
+            ret_rules_by_user = {}
+            missing_member_event_ids = {}
+            if state_group and self.state_group == context.prev_group:
+                # If we have a simple delta then we can reuse most of the previous
+                # results.
+                ret_rules_by_user = self.rules_by_user
+                current_state_ids = context.delta_ids
+            else:
+                current_state_ids = context.current_state_ids
+
+            logger.debug(
+                "Looking for member changes in %r %r", state_group, current_state_ids
+            )
+
+            # Loop through to see which member events we've seen and have rules
+            # for and which we need to fetch
+            for key in current_state_ids:
+                typ, user_id = key
+                if typ != EventTypes.Member:
+                    continue
+
+                if user_id in self.uninteresting_user_set:
+                    continue
+
+                if not self.is_mine_id(user_id):
+                    self.uninteresting_user_set.add(user_id)
+                    continue
+
+                if self.store.get_if_app_services_interested_in_user(user_id):
+                    self.uninteresting_user_set.add(user_id)
+                    continue
+
+                event_id = current_state_ids[key]
+
+                res = self.member_map.get(event_id, None)
+                if res:
+                    user_id, state = res
+                    if state == Membership.JOIN:
+                        rules = self.rules_by_user.get(user_id, None)
+                        if rules:
+                            ret_rules_by_user[user_id] = rules
+                    continue
+
+                # If a user has left a room we remove their push rule. If they
+                # joined then we readd it later in _update_rules_with_member_event_ids
+                ret_rules_by_user.pop(user_id, None)
+                missing_member_event_ids[user_id] = event_id
+
+            if missing_member_event_ids:
+                # If we have some memebr events we haven't seen, look them up
+                # and fetch push rules for them if appropriate.
+                logger.debug("Found new member events %r", missing_member_event_ids)
+                yield self._update_rules_with_member_event_ids(
+                    ret_rules_by_user, missing_member_event_ids, state_group, event
+                )
+
+        if logger.isEnabledFor(logging.DEBUG):
+            logger.debug(
+                "Returning push rules for %r %r",
+                self.room_id, ret_rules_by_user.keys(),
+            )
+        defer.returnValue(ret_rules_by_user)
+
+    @defer.inlineCallbacks
+    def _update_rules_with_member_event_ids(self, ret_rules_by_user, member_event_ids,
+                                            state_group, event):
+        """Update the partially filled rules_by_user dict by fetching rules for
+        any newly joined users in the `member_event_ids` list.
+
+        Args:
+            ret_rules_by_user (dict): Partiallly filled dict of push rules. Gets
+                updated with any new rules.
+            member_event_ids (list): List of event ids for membership events that
+                have happened since the last time we filled rules_by_user
+            state_group: The state group we are currently computing push rules
+                for. Used when updating the cache.
+        """
+        sequence = self.sequence
+
+        rows = yield self.store._simple_select_many_batch(
+            table="room_memberships",
+            column="event_id",
+            iterable=member_event_ids.values(),
+            retcols=('user_id', 'membership', 'event_id'),
+            keyvalues={},
+            batch_size=500,
+            desc="_get_rules_for_member_event_ids",
+        )
+
+        members = {
+            row["event_id"]: (row["user_id"], row["membership"])
+            for row in rows
+        }
+
+        # If the event is a join event then it will be in current state evnts
+        # map but not in the DB, so we have to explicitly insert it.
+        if event.type == EventTypes.Member:
+            for event_id in member_event_ids.itervalues():
+                if event_id == event.event_id:
+                    members[event_id] = (event.state_key, event.membership)
+
+        if logger.isEnabledFor(logging.DEBUG):
+            logger.debug("Found members %r: %r", self.room_id, members.values())
+
+        interested_in_user_ids = set(
+            user_id for user_id, membership in members.itervalues()
+            if membership == Membership.JOIN
+        )
+
+        logger.debug("Joined: %r", interested_in_user_ids)
+
+        if_users_with_pushers = yield self.store.get_if_users_have_pushers(
+            interested_in_user_ids,
+            on_invalidate=self.invalidate_all_cb,
+        )
+
+        user_ids = set(
+            uid for uid, have_pusher in if_users_with_pushers.iteritems() if have_pusher
+        )
+
+        logger.debug("With pushers: %r", user_ids)
+
+        users_with_receipts = yield self.store.get_users_with_read_receipts_in_room(
+            self.room_id, on_invalidate=self.invalidate_all_cb,
+        )
+
+        logger.debug("With receipts: %r", users_with_receipts)
+
+        # any users with pushers must be ours: they have pushers
+        for uid in users_with_receipts:
+            if uid in interested_in_user_ids:
+                user_ids.add(uid)
+
+        rules_by_user = yield self.store.bulk_get_push_rules(
+            user_ids, on_invalidate=self.invalidate_all_cb,
+        )
+
+        ret_rules_by_user.update(
+            item for item in rules_by_user.iteritems() if item[0] is not None
+        )
+
+        self.update_cache(sequence, members, ret_rules_by_user, state_group)
+
+    def invalidate_all(self):
+        # Note: Don't hand this function directly to an invalidation callback
+        # as it keeps a reference to self and will stop this instance from being
+        # GC'd if it gets dropped from the rules_to_user cache. Instead use
+        # `self.invalidate_all_cb`
+        logger.debug("Invalidating RulesForRoom for %r", self.room_id)
+        self.sequence += 1
+        self.state_group = object()
+        self.member_map = {}
+        self.rules_by_user = {}
+
+    def update_cache(self, sequence, members, rules_by_user, state_group):
+        if sequence == self.sequence:
+            self.member_map.update(members)
+            self.rules_by_user = rules_by_user
+            self.state_group = state_group
+
+
+class _Invalidation(namedtuple("_Invalidation", ("cache", "room_id"))):
+    # We rely on _CacheContext implementing __eq__ and __hash__ sensibly,
+    # which namedtuple does for us (i.e. two _CacheContext are the same if
+    # their caches and keys match). This is important in particular to
+    # dedupe when we add callbacks to lru cache nodes, otherwise the number
+    # of callbacks would grow.
+    def __call__(self):
+        rules = self.cache.get(self.room_id, None, update_metrics=False)
+        if rules:
+            rules.invalidate_all()
diff --git a/synapse/push/emailpusher.py b/synapse/push/emailpusher.py
index c7afd11111..a69dda7b09 100644
--- a/synapse/push/emailpusher.py
+++ b/synapse/push/emailpusher.py
@@ -21,7 +21,6 @@ import logging
 from synapse.util.metrics import Measure
 from synapse.util.logcontext import LoggingContext
 
-from mailer import Mailer
 
 logger = logging.getLogger(__name__)
 
@@ -56,8 +55,10 @@ class EmailPusher(object):
     This shares quite a bit of code with httpusher: it would be good to
     factor out the common parts
     """
-    def __init__(self, hs, pusherdict):
+    def __init__(self, hs, pusherdict, mailer):
         self.hs = hs
+        self.mailer = mailer
+
         self.store = self.hs.get_datastore()
         self.clock = self.hs.get_clock()
         self.pusher_id = pusherdict['id']
@@ -73,16 +74,6 @@ class EmailPusher(object):
 
         self.processing = False
 
-        if self.hs.config.email_enable_notifs:
-            if 'data' in pusherdict and 'brand' in pusherdict['data']:
-                app_name = pusherdict['data']['brand']
-            else:
-                app_name = self.hs.config.email_app_name
-
-            self.mailer = Mailer(self.hs, app_name)
-        else:
-            self.mailer = None
-
     @defer.inlineCallbacks
     def on_started(self):
         if self.mailer is not None:
diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index c0f8176e3d..8a5d473108 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -275,7 +275,7 @@ class HttpPusher(object):
         if event.type == 'm.room.member':
             d['notification']['membership'] = event.content['membership']
             d['notification']['user_is_target'] = event.state_key == self.user_id
-        if 'content' in event:
+        if not self.hs.config.push_redact_content and 'content' in event:
             d['notification']['content'] = event.content
 
         # We no longer send aliases separately, instead, we send the human
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py
index f83aa7625c..b5cd9b426a 100644
--- a/synapse/push/mailer.py
+++ b/synapse/push/mailer.py
@@ -78,23 +78,17 @@ ALLOWED_ATTRS = {
 
 
 class Mailer(object):
-    def __init__(self, hs, app_name):
+    def __init__(self, hs, app_name, notif_template_html, notif_template_text):
         self.hs = hs
+        self.notif_template_html = notif_template_html
+        self.notif_template_text = notif_template_text
+
         self.store = self.hs.get_datastore()
         self.macaroon_gen = self.hs.get_macaroon_generator()
         self.state_handler = self.hs.get_state_handler()
-        loader = jinja2.FileSystemLoader(self.hs.config.email_template_dir)
         self.app_name = app_name
+
         logger.info("Created Mailer for app_name %s" % app_name)
-        env = jinja2.Environment(loader=loader)
-        env.filters["format_ts"] = format_ts_filter
-        env.filters["mxc_to_http"] = self.mxc_to_http_filter
-        self.notif_template_html = env.get_template(
-            self.hs.config.email_notif_template_html
-        )
-        self.notif_template_text = env.get_template(
-            self.hs.config.email_notif_template_text
-        )
 
     @defer.inlineCallbacks
     def send_notification_mail(self, app_id, user_id, email_address,
@@ -481,28 +475,6 @@ class Mailer(object):
             urllib.urlencode(params),
         )
 
-    def mxc_to_http_filter(self, value, width, height, resize_method="crop"):
-        if value[0:6] != "mxc://":
-            return ""
-
-        serverAndMediaId = value[6:]
-        fragment = None
-        if '#' in serverAndMediaId:
-            (serverAndMediaId, fragment) = serverAndMediaId.split('#', 1)
-            fragment = "#" + fragment
-
-        params = {
-            "width": width,
-            "height": height,
-            "method": resize_method,
-        }
-        return "%s_matrix/media/v1/thumbnail/%s?%s%s" % (
-            self.hs.config.public_baseurl,
-            serverAndMediaId,
-            urllib.urlencode(params),
-            fragment or "",
-        )
-
 
 def safe_markup(raw_html):
     return jinja2.Markup(bleach.linkify(bleach.clean(
@@ -543,3 +515,52 @@ def string_ordinal_total(s):
 
 def format_ts_filter(value, format):
     return time.strftime(format, time.localtime(value / 1000))
+
+
+def load_jinja2_templates(config):
+    """Load the jinja2 email templates from disk
+
+    Returns:
+        (notif_template_html, notif_template_text)
+    """
+    logger.info("loading jinja2")
+
+    loader = jinja2.FileSystemLoader(config.email_template_dir)
+    env = jinja2.Environment(loader=loader)
+    env.filters["format_ts"] = format_ts_filter
+    env.filters["mxc_to_http"] = _create_mxc_to_http_filter(config)
+
+    notif_template_html = env.get_template(
+        config.email_notif_template_html
+    )
+    notif_template_text = env.get_template(
+        config.email_notif_template_text
+    )
+
+    return notif_template_html, notif_template_text
+
+
+def _create_mxc_to_http_filter(config):
+    def mxc_to_http_filter(value, width, height, resize_method="crop"):
+        if value[0:6] != "mxc://":
+            return ""
+
+        serverAndMediaId = value[6:]
+        fragment = None
+        if '#' in serverAndMediaId:
+            (serverAndMediaId, fragment) = serverAndMediaId.split('#', 1)
+            fragment = "#" + fragment
+
+        params = {
+            "width": width,
+            "height": height,
+            "method": resize_method,
+        }
+        return "%s_matrix/media/v1/thumbnail/%s?%s%s" % (
+            config.public_baseurl,
+            serverAndMediaId,
+            urllib.urlencode(params),
+            fragment or "",
+        )
+
+    return mxc_to_http_filter
diff --git a/synapse/push/pusher.py b/synapse/push/pusher.py
index de9c33b936..491f27bded 100644
--- a/synapse/push/pusher.py
+++ b/synapse/push/pusher.py
@@ -26,22 +26,54 @@ logger = logging.getLogger(__name__)
 # process works fine)
 try:
     from synapse.push.emailpusher import EmailPusher
+    from synapse.push.mailer import Mailer, load_jinja2_templates
 except:
     pass
 
 
-def create_pusher(hs, pusherdict):
-    logger.info("trying to create_pusher for %r", pusherdict)
+class PusherFactory(object):
+    def __init__(self, hs):
+        self.hs = hs
 
-    PUSHER_TYPES = {
-        "http": HttpPusher,
-    }
+        self.pusher_types = {
+            "http": HttpPusher,
+        }
 
-    logger.info("email enable notifs: %r", hs.config.email_enable_notifs)
-    if hs.config.email_enable_notifs:
-        PUSHER_TYPES["email"] = EmailPusher
-        logger.info("defined email pusher type")
+        logger.info("email enable notifs: %r", hs.config.email_enable_notifs)
+        if hs.config.email_enable_notifs:
+            self.mailers = {}  # app_name -> Mailer
 
-    if pusherdict['kind'] in PUSHER_TYPES:
-        logger.info("found pusher")
-        return PUSHER_TYPES[pusherdict['kind']](hs, pusherdict)
+            templates = load_jinja2_templates(hs.config)
+            self.notif_template_html, self.notif_template_text = templates
+
+            self.pusher_types["email"] = self._create_email_pusher
+
+            logger.info("defined email pusher type")
+
+    def create_pusher(self, pusherdict):
+        logger.info("trying to create_pusher for %r", pusherdict)
+
+        if pusherdict['kind'] in self.pusher_types:
+            logger.info("found pusher")
+            return self.pusher_types[pusherdict['kind']](self.hs, pusherdict)
+
+    def _create_email_pusher(self, _hs, pusherdict):
+        app_name = self._app_name_from_pusherdict(pusherdict)
+        mailer = self.mailers.get(app_name)
+        if not mailer:
+            mailer = Mailer(
+                hs=self.hs,
+                app_name=app_name,
+                notif_template_html=self.notif_template_html,
+                notif_template_text=self.notif_template_text,
+            )
+            self.mailers[app_name] = mailer
+        return EmailPusher(self.hs, pusherdict, mailer)
+
+    def _app_name_from_pusherdict(self, pusherdict):
+        if 'data' in pusherdict and 'brand' in pusherdict['data']:
+            app_name = pusherdict['data']['brand']
+        else:
+            app_name = self.hs.config.email_app_name
+
+        return app_name
diff --git a/synapse/push/pusherpool.py b/synapse/push/pusherpool.py
index 3837be523d..43cb6e9c01 100644
--- a/synapse/push/pusherpool.py
+++ b/synapse/push/pusherpool.py
@@ -16,7 +16,7 @@
 
 from twisted.internet import defer
 
-import pusher
+from .pusher import PusherFactory
 from synapse.util.logcontext import preserve_fn, preserve_context_over_deferred
 from synapse.util.async import run_on_reactor
 
@@ -28,6 +28,7 @@ logger = logging.getLogger(__name__)
 class PusherPool:
     def __init__(self, _hs):
         self.hs = _hs
+        self.pusher_factory = PusherFactory(_hs)
         self.start_pushers = _hs.config.start_pushers
         self.store = self.hs.get_datastore()
         self.clock = self.hs.get_clock()
@@ -48,7 +49,7 @@ class PusherPool:
         # will then get pulled out of the database,
         # recreated, added and started: this means we have only one
         # code path adding pushers.
-        pusher.create_pusher(self.hs, {
+        self.pusher_factory.create_pusher({
             "id": None,
             "user_name": user_id,
             "kind": kind,
@@ -186,7 +187,7 @@ class PusherPool:
         logger.info("Starting %d pushers", len(pushers))
         for pusherdict in pushers:
             try:
-                p = pusher.create_pusher(self.hs, pusherdict)
+                p = self.pusher_factory.create_pusher(pusherdict)
             except:
                 logger.exception("Couldn't start a pusher: caught Exception")
                 continue