TopicSubscription

All Known Subinterfaces:

DurableTopicSubscription
```
public interface TopicSubscription
```
NCache provides TopicSubscription interface which is returned against the desired topic, containing information for topic subscriptions.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addMessageReceivedListener(MessageReceivedListener messageReceivedListener)`	Event to register subscriber against the topic so that it can receive the published messages.
`Topic`	`getTopic()`	Retrieves the topic instance containing information about the topic.
`void`	`removeMessageReceivedListener(MessageReceivedListener messageReceivedListener)`	Unregisters the user for message received event.
`void`	`unSubscribe()`	This method unsubscribes the topic.

- Method Detail
  - getTopic
```
Topic getTopic()
```
    Retrieves the topic instance containing information about the topic.
    
    Returns:
    
    Topic instance of the topic, null if it does not exist.
  - addMessageReceivedListener
```
void addMessageReceivedListener(MessageReceivedListener messageReceivedListener)
                         throws CacheException
```
    Event to register subscriber against the topic so that it can receive the published messages.
    
    Parameters:
    
    messageReceivedListener - The listener that is invoked whenever a message is received.
    
    Throws:
    
    CacheException
  - removeMessageReceivedListener
```
void removeMessageReceivedListener(MessageReceivedListener messageReceivedListener)
                            throws CacheException
```
    Unregisters the user for message received event.
    
    Parameters:
    
    messageReceivedListener - The instance of the registerd message received listener.
    
    Throws:
    
    CacheException
  - unSubscribe
```
void unSubscribe()
          throws java.lang.Exception
```
    This method unsubscribes the topic.
    
    Throws:
    
    java.lang.Exception