TopicListener

```
public interface TopicListener
```
User needs to implement this interface in order to receive topic deleted and message delivery failure events.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onMessageDeliveryFailure(java.lang.Object sender, MessageFailedEventArgs args)`	Topic deletion events are delivered through this listener.
`void`	`onTopicDeleted(java.lang.Object sender, TopicDeleteEventArgs args)`	Subscribe for message delivery failure events.

- Method Detail
  - onTopicDeleted
```
void onTopicDeleted(java.lang.Object sender,
                    TopicDeleteEventArgs args)
```
    Subscribe for message delivery failure events. You can use this listener to perform the tasks when message delivery fails.
    
    Parameters:
    
    sender - Sender's information.
    
    args - Event Arguments.
  - onMessageDeliveryFailure
```
void onMessageDeliveryFailure(java.lang.Object sender,
                              MessageFailedEventArgs args)
```
    Topic deletion events are delivered through this listener. You can use this listener to perform the tasks when a topic is deleted.
    
    Parameters:
    
    sender - Sender's information.
    
    args - Event Arguments.