WebAppCleanup (zk 10.0.0 API)

All Known Implementing Classes:

WebSocketWebAppInit
```
public interface WebAppCleanup
```
Used to initialize a ZK application when it about to be destroyed.
How this interface is used.
1. First, you specify a class that implements this interface in WEB-INF/zk.xml as a listener.
2. Then, every time a ZK application is going to be destroyed, an instance of the specified class is instantiated and cleanup(org.zkoss.zk.ui.WebApp) is called.
Author:

tomyeh

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void cleanup(WebApp wapp)
  called when a ZK application is about to be destroyed.

- Method Detail
  - cleanup
```
void cleanup(WebApp wapp)
      throws java.lang.Exception
```
    called when a ZK application is about to be destroyed.
    If this method throws an exception, the error message is only logged (user won't see it).
    
    Throws:
    
    java.lang.Exception