TimerHandler (digitaltwin-builder 2.4.0 API)

Type Parameters:

T - the type of the DigitalTwinBase.
```
public interface TimerHandler<T extends DigitalTwinBase>
```
Callback to a handle a timer message for a DigitalTwinBase.

- Method Summary
  
  Modifier and Type Method Description
  
  ProcessingResult onTimedMessage(java.lang.String timerName, T instance, ProcessingContext ctx)
  Callback to handle a timer message.

- Method Detail
  - onTimedMessage
```
ProcessingResult onTimedMessage(java.lang.String timerName,
                                T instance,
                                ProcessingContext ctx)
```
    Callback to handle a timer message.
    
    Parameters:
    
    timerName - the timer's unique identifier.
    
    instance - the digital twin instance.
    
    ctx - the processing context.
    
    Returns:
    
    ProcessingResult.UpdateDigitalTwin to update the digital twin instance or ProcessingResult.NoUpdate to leave the instance state as is.