org.agilewiki.jactor

Interface ExceptionHandler

public interface ExceptionHandler

As responses can be received either synchronously or asynchronously, control flow can be somewhat obscure and the code to catch exceptions can be error prone. Use of an exception handler makes life simpler.

To assign an exception handler, call the setExceptionHandler method in the constructor of an actor.

If an exception occurs when processing a request, and no exception handler has been assigned, the exception is passed to the exception handler of the actor which sent the request, recursively.

 public class Doer extends JLPCActor {
     public Doer(Mailbox mailbox) {
         super(mailbox);
     }

     protected void processRequest(final Object request, final RP rp)
             throws Exception {
         setExceptionHandler(new ExceptionHandler() {
             public void process(Exception exception) throws Exception {
                 System.out.println("Exception caught by Doer");
                 rp.process(null);
             }
         });
         if (request instanceof T1) {
             throw new Exception("Exception thrown in request processing");
         } else {
             rp.process(request);
         }
     }
 }
 

Method Summary

Methods

Modifier and Type	Method and Description
void	process(Exception exception) Process an exception.

Method Detail

process

void process(Exception exception)
             throws Exception

Process an exception.

Parameters:

exception - The exception to be processed.

Throws:

Exception - Any uncaught exceptions raised while processing the exception.