diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index 2d66b3721a..a2ffd273bf 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -192,6 +192,9 @@ class DeviceHandler(BaseHandler):
@defer.inlineCallbacks
def notify_device_update(self, user_id, device_ids):
+ """Notify that a user's device(s) has changed. Pokes the notifier, and
+ remote servers if the user is local.
+ """
rooms = yield self.store.get_rooms_for_user(user_id)
room_ids = [r.room_id for r in rooms]
@@ -210,12 +213,16 @@ class DeviceHandler(BaseHandler):
"device_list_key", position, rooms=room_ids,
)
- logger.info("Sending device list update notif to: %r", hosts)
- for host in hosts:
- self.federation_sender.send_device_messages(host)
+ if hosts:
+ logger.info("Sending device list update notif to: %r", hosts)
+ for host in hosts:
+ self.federation_sender.send_device_messages(host)
@defer.inlineCallbacks
def get_device_list_changes(self, user_id, room_ids, from_key):
+ """For a user and their joined rooms, calculate which device updates
+ we need to return.
+ """
room_ids = frozenset(room_ids)
user_ids_changed = set()
@@ -236,11 +243,14 @@ class DeviceHandler(BaseHandler):
if get_domain_from_id(user_id) != origin:
# TODO: Raise?
+ logger.warning("Got device list update edu for %r from %r", user_id, origin)
return
logger.info("Got edu: %r", edu_content)
with (yield self._remote_edue_linearizer.queue(user_id)):
+ # If the prev id matches whats in our cache table, then we don't need
+ # to resync the users device list, otherwise we do.
resync = True
if len(prev_ids) == 1:
extremity = yield self.store.get_device_list_remote_extremity(user_id)
@@ -249,6 +259,7 @@ class DeviceHandler(BaseHandler):
resync = False
if resync:
+ # Fetch all devices for the user.
result = yield self.federation.query_user_devices(origin, user_id)
stream_id = result["stream_id"]
devices = result["devices"]
@@ -258,6 +269,8 @@ class DeviceHandler(BaseHandler):
device_ids = [device["device_id"] for device in devices]
yield self.notify_device_update(user_id, device_ids)
else:
+ # Simply update the single device, since we know that is the only
+ # change (becuase of the single prev_id matching the current cache)
content = dict(edu_content)
for key in ("user_id", "device_id", "stream_id", "prev_ids"):
content.pop(key, None)
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