RequestExceptionHandler (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

DefaultRequestExceptionHandler
```
@UsesMappedConfiguration(key=java.lang.Class.class,
                         value=java.lang.Object.class)
public interface RequestExceptionHandler
```
Service invoked when an uncaught exception occurs. The error handler is responsible for providing a response to the user to describe the error. The default implementation accepts the configuration, which maps an exception class to a corresponding helper. The helper is either an instance of ExceptionHandlerAssistant or is a Class for a page that will be redirected to, to present the exception.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`handleRequestException(Throwable exception)`	Responsible for handling the error in some way and providing some response to the client.

- Method Detail
  - handleRequestException
```
void handleRequestException(Throwable exception)
                     throws IOException
```
    Responsible for handling the error in some way and providing some response to the client. A default implementation may render an error response page. The handler is also responsible for setting the response status and the X-Tapestry-ErrorMessage response header. These are very important in Ajax requests to allow the client-side logic to detect the error and present it to the user.
    
    Parameters:
    
    exception - uncaught exception to be reported
    
    Throws:
    
    IOException