```
public interface ConfirmListener
```
Implement this interface in order to be notified of Confirm events. Acks represent messages handled successfully; Nacks represent messages lost by the broker. Note, the lost messages could still have been delivered to consumers, but the broker cannot guarantee this.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`handleAck(long deliveryTag, boolean multiple)`
`void`	`handleNack(long deliveryTag, boolean multiple)`

void handleAck(long deliveryTag,
               boolean multiple)
        throws IOException

void handleNack(long deliveryTag,
                boolean multiple)
         throws IOException

Interface ConfirmListener