Re: How to return application exception in RMI binding?

[Raymond Feng]

Hi,

RemoteException and its subclasses are usually used to represent 
communication issues and not treated as business exceptions by Tuscany based 
on the statement from JAXWS Specification v2.1 section 3.7. SCA spec 
requires the remotable interface follows JAXWS mapping rules.

Thanks,
Raymond

From: Sun Yang
Sent: Thursday, July 17, 2008 5:23 PM
To: user@tuscany.apache.org
Subject: Re: How to return application exception in RMI binding?


Hi, Luciano:

My scenario is not the same. I use a pure RMI client (agnostic of Tuscany) 
to connect to a service exposed by a RMI binding.

I make some modifications to sample project calculator-rmi-service. So 
instead of return Infinity, it should throw a RemoteException when divide by 
zero. But at the client side, instead of getting the RemoteException, I got 
a InvocationTargetException which wraps the RemoteException.

The client code to connect to sca service is:
public class CalculatorClient {
   public static void main(String[] args) throws Exception {
       CalculatorService calculatorService = 
(CalculatorService)Naming.lookup("//localhost:8099/CalculatorRMIService");

       System.out.println("3 / 0=" + calculatorService.divide(3, 0));

   }
}

Best Regards,
Yang Sun




2008/7/18 Luciano Resende <[EMAIL PROTECTED]>:

Is your scenario different from the one defined in the RMI Binding
test case where the method would throw the Hello business exception ?

String sayHi(String name, String greeter) throws HelloException;

[1] 
https://svn.apache.org/repos/asf/tuscany/java/sca/modules/binding-rmi/src/test/java/org/apache/tuscany/sca/binding/rmi/BindingTestCase.java


On Thu, Jul 17, 2008 at 7:15 AM, Sun Yang <[EMAIL PROTECTED]> wrote:
Hi,
I want to get an application specific exception (which extends
java.rmi.RemoteException) from calling a rmi binding service. But the
exception always wrappered in a InvocationTargetException.

RMI spec supports remote exception. I am not sure if I missed something in
the composite configuration or Tuscany doesn't support throwing the
RemoteException directly.

In RuntimeWireInvoker.java, I find the following code which relates to the
exception handling.
            Object body = resp.getBody();
            if (resp.isFault()) {
                throw new InvocationTargetException((Throwable)body);
            }
I guess the wrapping here is the cause of the exception wrapper.

Best Regards,
Yang Sun





--
Luciano Resende
Apache Tuscany Committer
http://people.apache.org/~lresende
http://lresende.blogspot.com/