QPID-2883: store events until schema response arrives.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@1000629 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 50 insertions, 4 deletions

diff --git a/extras/qmf/src/py/qmf/console.py b/extras/qmf/src/py/qmf/console.py
index 2cda391370..15a58eddd9 100644
--- a/extras/qmf/src/py/qmf/console.py
+++ b/extras/qmf/src/py/qmf/console.py
@@ -1720,6 +1720,12 @@ class ClassKey:
     else:
       self.type = ClassKey.TYPE_DATA
 
+  def __hash__(self):
+    ss = self.pname + self.cname + self.getHashString()
+    return ss.__hash__()
+
+  def __eq__(self, other):
+    return self.__repr__() == other.__repr__()
 
 #===================================================================================================
 # SchemaClass
@@ -3212,8 +3218,8 @@ class Agent:
         context.doEvent(event)
       else:
         # schema not optional and not present
-        self._v2SendSchemaRequest(event.classKey)
-        # @todo: event dropped - fix this!
+        if context.addPendingEvent(event):
+          self._v2SendSchemaRequest(event.classKey)
 
     elif kind == "_schema_id":
       for sid in content:
@@ -3448,6 +3454,7 @@ class RequestContext(object):
     self.startTime = time()
     self.rawQueryResults = []
     self.queryResults = []
+    self.pendingEvents = {}
     self.exception = None
     self.waitingForSchema = None
     self.pendingSignal = None
@@ -3493,6 +3500,45 @@ class RequestContext(object):
           return
     self.rawQueryResults.append(data)
 
+  def addPendingEvent(self, event):
+    """ Stores a received event that is pending a schema.  Returns True if this
+    event is the first instance of a given schema identifier.
+    """
+    self.cv.acquire()
+    try:
+      if event.classKey in self.pendingEvents:
+        self.pendingEvents[event.classKey].append((event, time()))
+        return False
+      self.pendingEvents[event.classKey] = [(event, time())]
+      return True
+    finally:
+      self.cv.release()
+
+  def processPendingEvents(self):
+    """ Walk the pending events looking for schemas that are now
+    available. Remove any events that now have schema, and process them.
+    """
+    keysToDelete = []
+    events = []
+    self.cv.acquire()
+    try:
+      for key in self.pendingEvents.iterkeys():
+        schema = self.schemaCache.getSchema(key)
+        if schema:
+          keysToDelete.append(key)
+          for item in self.pendingEvents[key]:
+            # item is (timestamp, event-obj) tuple.
+            # hack: I have no idea what a valid lifetime for an event
+            # should be. 60 seconds???
+            if (time() - item[1]) < 60:
+              item[0].schema = schema
+              events.append(item[0])
+      for key in keysToDelete:
+        self.pendingEvents.pop(key)
+    finally:
+      self.cv.release()
+    for event in events:
+      self.doEvent(event)
 
   def doEvent(self, data):
     if self.notifiable:
@@ -3610,7 +3656,7 @@ class RequestContext(object):
   def reprocess(self):
     """
     New schema information has been added to the schema-cache.  Clear our 'waiting' status
-    and see if we can make more progress on the raw query list.
+    and see if we can make more progress on any pending inbound events/objects.
     """
     try:
       self.cv.acquire()
@@ -3618,7 +3664,7 @@ class RequestContext(object):
     finally:
       self.cv.release()
     self.processV2Data()
-
+    self.processPendingEvents()
 
   def _getSchemaIdforV2ObjectLH(self, data):
     """