MessageHandler (NATS.IO Java API)

```
public interface MessageHandler
```
Dispatchers use the MessageHandler interface to define the listener for their messages. Each Dispatcher can have a single message handler, although the handler can use the incoming message's subject to branch for the actual work.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void onMessage(Message msg)
  Called to deliver a message to the handler.

- Method Detail
  - onMessage
```
void onMessage(Message msg)
        throws java.lang.InterruptedException
```
    Called to deliver a message to the handler. This call is in the dispatcher's thread and can block all other messages being delivered.
    The thread used to call onMessage will be interrupted if the connection is closed, or the dispatcher is stopped.
    
    Parameters:
    
    msg - the received Message
    
    Throws:
    
    java.lang.InterruptedException - if the dispatcher interrupts this handler