AcknowledgedMessagesExtension.Listener (CometD :: Java :: Server :: Common 6.0.17 API)

Enclosing class:

AcknowledgedMessagesExtension
```
public static interface AcknowledgedMessagesExtension.Listener
```
A listener for acknowledgement events.

Implementation will be notified of these events:
- batchSend, when a batch of messages is sent to a client session
- onBatchReceive(ServerSession, long), when the client session confirms it has received a batch of messages
Stateful implementations may use Session.setAttribute(String, Object) to store per-session data, or a Map<ServerSession, ?>

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`onBatchReceive(ServerSession session, long batch)`	Callback method invoked when a client session confirms it has received the given batch of messages.
`default void`	`onBatchSend(ServerSession session, java.util.List<ServerMessage> messages, long batch)`	Callback method invoked when a batch of message is about to be sent to a client session.

- Method Detail
  - onBatchSend
```
default void onBatchSend(ServerSession session,
                         java.util.List<ServerMessage> messages,
                         long batch)
```
    Callback method invoked when a batch of message is about to be sent to a client session.
    
    Parameters:
    
    session - the session
    
    messages - the messages to send, as an immutable list
    
    batch - the batch number
  - onBatchReceive
```
default void onBatchReceive(ServerSession session,
                            long batch)
```
    Callback method invoked when a client session confirms it has received the given batch of messages.
    
    Parameters:
    
    session - the session
    
    batch - the batch number