LifecycleListener (PDI Core 9.3.0.0-424 API)

```
public interface LifecycleListener
```
A callback interface that listens to specific lifecycle events triggered when Spoon starts and stops. Listeners are loaded dynamically by PDI. In order to register a listener with Spoon, a class that implements this interface must be placed in the "org.pentaho.di.core.listeners.pdi" package, and it will be loaded automatically when Spoon starts.

Author:

Alex Silva

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onExit(LifeEventHandler handler)`	Called when the application ends
`void`	`onStart(LifeEventHandler handler)`	Called when the application starts.

- Method Detail
  - onStart
```
void onStart(LifeEventHandler handler)
      throws LifecycleException
```
    Called when the application starts.
    
    Throws:
    
    LifecycleException - Whenever this listener is unable to start succesfully.
  - onExit
```
void onExit(LifeEventHandler handler)
     throws LifecycleException
```
    Called when the application ends
    
    Throws:
    
    LifecycleException - If a problem prevents this listener from shutting down.