checkIfRequiredPartsReady introduced to Entity. If no sequence is defined then...

checkIfRequiredPartsReady introduced to Entity. If no sequence is defined then the method returns True (for Jobs)

dream/simulation/ConditionalBuffer.py

@@ -65,6 +65,7 @@ class ConditionalBuffer(QueueJobShop):
                 if activeEntity in requiredParts:
                     # if the entity that requires the activeEntity can proceed then signal the currentStation of the entity
                     if entity.checkIfRequiredPartsReady():
+                        entity.mayProceed=True
                         self.sendSignal(receiver=entity.currentStation, signal=entity.currentStation.canDispose)
         return activeEntity
         

dream/simulation/Entity.py

@@ -94,4 +94,10 @@ class Entity(ManPyObject):
     #===========================================================================
     def printRoute(self):
         pass
+    
+    #===========================================================================
+    # method not implemented yet
+    #===========================================================================
+    def checkIfRequiredPartsReady(self):
+        return True
     
\ No newline at end of file

dream/simulation/Job.py

@@ -135,6 +135,9 @@ class Job(Entity):                                  # inherits from the Entity c
     def checkIfRequiredPartsReady(self):
         # find the sequence of the next step in the route of the activeEntity
         sequence=self.nextStepSequence()
+        # if no sequence is provided then return true
+        if sequence=='not available':
+            return True
         # assert that the sequence is not zero
         assert sequence, "the route sequence of the conditionalBuffer successor cannot be zero"
         # flag that decides if the entity can proceed to the next station in its route
@@ -194,7 +197,7 @@ class Job(Entity):                                  # inherits from the Entity c
     #===========================================================================
     def nextStepSequence(self):
         # find the sequence of the next step in the route of the activeEntity
-        sequence=self.remainingRoute[0].get('sequence',0)
+        sequence=self.remainingRoute[0].get('sequence','not available')
         return sequence
     
     #===========================================================================