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-rw-r--r--synapse/handlers/sync.py23
1 files changed, 13 insertions, 10 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index 06d17ab20c..b52e4c2aff 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -15,7 +15,7 @@
 
 from synapse.api.constants import Membership, EventTypes
 from synapse.util.async import concurrently_execute
-from synapse.util.logcontext import LoggingContext, make_deferred_yieldable, preserve_fn
+from synapse.util.logcontext import LoggingContext
 from synapse.util.metrics import Measure, measure_func
 from synapse.util.caches.response_cache import ResponseCache
 from synapse.push.clientformat import format_push_rules_for_user
@@ -52,6 +52,7 @@ class TimelineBatch(collections.namedtuple("TimelineBatch", [
         to tell if room needs to be part of the sync result.
         """
         return bool(self.events)
+    __bool__ = __nonzero__  # python3
 
 
 class JoinedSyncResult(collections.namedtuple("JoinedSyncResult", [
@@ -76,6 +77,7 @@ class JoinedSyncResult(collections.namedtuple("JoinedSyncResult", [
             # nb the notification count does not, er, count: if there's nothing
             # else in the result, we don't need to send it.
         )
+    __bool__ = __nonzero__  # python3
 
 
 class ArchivedSyncResult(collections.namedtuple("ArchivedSyncResult", [
@@ -95,6 +97,7 @@ class ArchivedSyncResult(collections.namedtuple("ArchivedSyncResult", [
             or self.state
             or self.account_data
         )
+    __bool__ = __nonzero__  # python3
 
 
 class InvitedSyncResult(collections.namedtuple("InvitedSyncResult", [
@@ -106,6 +109,7 @@ class InvitedSyncResult(collections.namedtuple("InvitedSyncResult", [
     def __nonzero__(self):
         """Invited rooms should always be reported to the client"""
         return True
+    __bool__ = __nonzero__  # python3
 
 
 class GroupsSyncResult(collections.namedtuple("GroupsSyncResult", [
@@ -117,6 +121,7 @@ class GroupsSyncResult(collections.namedtuple("GroupsSyncResult", [
 
     def __nonzero__(self):
         return bool(self.join or self.invite or self.leave)
+    __bool__ = __nonzero__  # python3
 
 
 class DeviceLists(collections.namedtuple("DeviceLists", [
@@ -127,6 +132,7 @@ class DeviceLists(collections.namedtuple("DeviceLists", [
 
     def __nonzero__(self):
         return bool(self.changed or self.left)
+    __bool__ = __nonzero__  # python3
 
 
 class SyncResult(collections.namedtuple("SyncResult", [
@@ -159,6 +165,7 @@ class SyncResult(collections.namedtuple("SyncResult", [
             self.device_lists or
             self.groups
         )
+    __bool__ = __nonzero__  # python3
 
 
 class SyncHandler(object):
@@ -180,15 +187,11 @@ class SyncHandler(object):
         Returns:
             A Deferred SyncResult.
         """
-        result = self.response_cache.get(sync_config.request_key)
-        if not result:
-            result = self.response_cache.set(
-                sync_config.request_key,
-                preserve_fn(self._wait_for_sync_for_user)(
-                    sync_config, since_token, timeout, full_state
-                )
-            )
-        return make_deferred_yieldable(result)
+        return self.response_cache.wrap(
+            sync_config.request_key,
+            self._wait_for_sync_for_user,
+            sync_config, since_token, timeout, full_state,
+        )
 
     @defer.inlineCallbacks
     def _wait_for_sync_for_user(self, sync_config, since_token, timeout,