MessageHandler (ActiveMQ Artemis Website 2.33.0 API)

```
public interface MessageHandler
```
A MessageHandler is used to receive message asynchronously.
To receive messages asynchronously, a MessageHandler is set on a ClientConsumer. Every time the consumer will receive a message, it will call the handler's onMessage() method.

See Also:

ClientConsumer.setMessageHandler(MessageHandler)

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`onMessage(ClientMessage message)`	Notifies the MessageHandler that a message has been received.
`default void`	`onMessageExpired(ClientMessage message)`	Notifies the MessageHandler that an expired message has been received.

- Method Detail
  - onMessage
```
void onMessage(ClientMessage message)
```
    Notifies the MessageHandler that a message has been received.
    
    Parameters:
    
    message - a message
  - onMessageExpired
```
default void onMessageExpired(ClientMessage message)
```
    Notifies the MessageHandler that an expired message has been received.
    
    Parameters:
    
    message - a message