🚀 go-pugleaf

onlyMIT commented on a change in pull request #2528: ARTEMIS-2226 last consumer connection should close the previous consu…
URL: https://github.com/apache/activemq-artemis/pull/2528#discussion_r252919168



 ##########
 File path: artemis-protocols/artemis-mqtt-protocol/src/main/java/org/apache/activemq/artemis/core/protocol/mqtt/MQTTProtocolManager.java
 ##########
 @@ -62,11 +73,44 @@
                        List<BaseInterceptor> outgoingInterceptors) {
       this.server = server;
       this.updateInterceptors(incomingInterceptors, outgoingInterceptors);
+      server.getManagementService().addNotificationListener(this);
    }

    @Override
    public void onNotification(Notification notification) {
-      // TODO handle notifications
+      if (!(notification.getType() instanceof CoreNotificationType))
+         return;
+
+      CoreNotificationType type = (CoreNotificationType) notification.getType();
+      if (type != CONSUMER_CREATED)
+         return;
+
+      TypedProperties props = notification.getProperties();
+
+      SimpleString protocolName = props.getSimpleStringProperty(ManagementHelper.HDR_PROTOCOL_NAME);
+
+      if (protocolName == null || !protocolName.toString().equals(MQTTProtocolManagerFactory.MQTT_PROTOCOL_NAME))
+         return;
+
+      int distance = props.getIntProperty(ManagementHelper.HDR_DISTANCE);
+
+      if (distance > 0) {
+         SimpleString queueName = props.getSimpleStringProperty(ManagementHelper.HDR_ROUTING_NAME);
+
+         Binding binding = server.getPostOffice().getBinding(queueName);
+         if (binding != null) {
+            Queue queue = (Queue) binding.getBindable();
+            String clientId = props.getSimpleStringProperty(ManagementHelper.HDR_CLIENT_ID).toString();
+            //If the client ID represents a client already connected to the server then the server MUST disconnect the existing client.
+            //Avoid consumers with the same client ID in the cluster appearing at different nodes at the same time
+            Collection<Consumer> consumersSet = queue.getConsumers();
+            for (Consumer consumer : consumersSet) {
+               ServerConsumerImpl serverConsumer = (ServerConsumerImpl) consumer;
+               if (clientId.equals(serverConsumer.getConnectionClientID()))
+                  serverConsumer.getRemotingConnection().destroy();

 Review comment:
   Thanks for your answer，i not find the connection notification，if we had we can use it.

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users-pF6z+fRhj9EyzMRdD/IqWQ@public.gmane.org


With regards,
Apache Git Services