app.py

@@ -3,7 +3,7 @@ import sentry_sdk
 import communicator
 import consumerlocator
 import messagesender
-
+import time
 
 """
 Main Flask RESTful API
@@ -27,9 +27,17 @@ if __name__ == "__main__":
     print("Producer: started sending")
     for i in range(30):
         msg = message.createMessage(20)
-        print("Producer: send ", i, "th message: ", msg)
+        print("Producer: trying to send ", i, "th message: ", msg)
-        if not conslist.checkcurrentconsumer():
+        available = False
-            conslist.updateconsumer()
+        if conslist.updateconsumer() is None:
-        comm.sendmessage(msg)
+            print("Producer: no consumer available (waiting a bit)")
+            time.sleep(1)
+        else:
+            available = True
+        if available:
+            comm.sendmessage(msg)
+            print("Producer: message sent")
+        else:
+            print("Producer: failed to send message")
 
     print("Producer: finished")

consumerlocator.py

@@ -24,10 +24,9 @@ class ConsumerLocator:
         """
         Initialize class.
         """
-        os.environ["KnownConsumer"] = "MockRemoveMe"
+        os.environ["KnownConsumer"] = "10.69.42.2"  # TODO remove
         self.consumerlist = [{"Host": os.environ["KnownConsumer"], "State": True, "LastOk": datetime.datetime.now()}]
         self.currentconsumer = self.consumerlist[0]
-        print(self.currentconsumer)
 
     def initcommunicator(self,  comm: communicator.Communicator):
         """
@@ -43,8 +42,15 @@ class ConsumerLocator:
         recievedconsumerlist = self.communicator.discoveravailableconsumers()
         if recievedconsumerlist is None:
             return
-        for consumer in recievedconsumerlist:
+        for recconsumer in recievedconsumerlist:
-            self.consumerList.append({"Host": consumer, "State": True, "LastOk": datetime.datetime.now()})
+            contains = False
+            for consumer in self.consumerlist:
+                if consumer["Host"] == recconsumer:
+                    contains = True
+
+            if not contains:
+                self.consumerlist.append({"Host": recconsumer, "State": True, "LastOk": datetime.datetime.now()})
+
         self.updateconsumerlist()
 
     def updateconsumerlist(self):
@@ -59,18 +65,18 @@ class ConsumerLocator:
                     removelist.append(consumer)
             else:
                 consumer["LastOk"] = datetime.datetime.now()
+                consumer["State"] = True
         for rem in removelist:
             self.consumerlist.remove(rem)
 
     def updateconsumer(self):
         """
-        Checks all the consumers in the list and updates the current consumer if necessary.
+        If the current consumer is not available, checks all the consumers in the list and updates the current one.
         :return: the current consumer or None if there are no available customers at the moment.
         """
-        self.updateconsumerlist()
 
         if not self.checkcurrentconsumer():
-
+            self.updateconsumerlist()
             newcurrentconsumer = None
 
             for consumer in self.consumerlist:
@@ -79,7 +85,8 @@ class ConsumerLocator:
                     break
 
             self.currentconsumer = newcurrentconsumer
-            self.learnconsumerlist()
+            if self.currentconsumer is not None:
+                self.learnconsumerlist()
 
         if self.currentconsumer is not None:
             return self.currentconsumer["Host"]
@@ -98,5 +105,6 @@ class ConsumerLocator:
         Check the consumers health.
         :return: True if OK, False if fail
         """
-        #  return self.communicator.checkconsumer(self.currentconsumer["Host"])
+        if self.currentconsumer is None:
-        return True  # TODO remove this line and uncomment the above
+            return False
+        return self.communicator.checkconsumer(self.currentconsumer["Host"])