setWIP to send canDispose to buffers

dream/simulation/Globals.py

@@ -273,6 +273,15 @@ def setWIP(entityList):
                 entity.hot = True
             # add the entity to the pendingEntities list
             G.pendingEntities.append(entity)
+            
+        # if the station is buffer then sent the canDispose signal
+        from Queue import Queue
+        if entity.currentStation:
+            if issubclass(entity.currentStation.__class__, Queue):
+                # send the signal only if it is not already triggered
+                if not entity.currentStation.canDispose.triggered:
+                    # print 'sending canDispose to', entity.currentStation.id
+                    entity.currentStation.canDispose.succeed(G.env.now)   
         # if we are in the start of the simulation the object is of server type then we should send initialWIP signal
         # TODO, maybe use 'class_family attribute here'
         if G.env.now==0 and entity.currentStation: