[RigoDaemon] _send_greetings: keep one and only one thread running the calculation, discard multiple concurrent requests

2012-04-10 13:25:52 +02:00
parent 96e5add095
commit 325813243c
1 changed files with 9 additions and 1 deletions
@@ -1871,7 +1871,12 @@ class RigoDaemonService(dbus.service.Object):
        """
        Send connected clients several welcome signals.
        """
-        with self._greetings_serializer:
+        acquired = False
+        try:
+            acquired = self._greetings_serializer.acquire(False)
+            if not acquired:
+                return
+
            with self._activity_mutex:
                self._acquire_shared()
                try:
@@ -1912,6 +1917,9 @@ class RigoDaemonService(dbus.service.Object):

                finally:
                    self._release_shared()
+        finally:
+            if acquired:
+                self._greetings_serializer.release()

    def _dbus_prepare_noticeboard_metadata(self, notices):
        """