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From "Sergey Beryozkin (JIRA)" <>
Subject [jira] [Commented] (CXF-4934) JAXRSInvoker and Proxy classes (Spring Security)
Date Tue, 02 Apr 2013 07:27:16 GMT


Sergey Beryozkin commented on CXF-4934:

Hi - I'm actually not sure the invocation handler invokes the right method either. CXF does
"method.invoke(object)" and in this case it does not work because the method belongs to the
service bean class, not to its proxy. I suspect the handler works because it is smart enough
to invoke directly on the service bean - bypassing the AOP layer supporting @Secured - I was
not able to confirm because even with "rod:koala" I was getting 403 :-) 
> JAXRSInvoker and Proxy classes (Spring Security)
> ------------------------------------------------
>                 Key: CXF-4934
>                 URL:
>             Project: CXF
>          Issue Type: Bug
>          Components: JAX-RS
>    Affects Versions: 2.7.3, 2.8.0
>         Environment: Spring framework ver 3.1.3.RELEASE
>            Reporter: Fran Pregernik
>            Priority: Minor
>              Labels: invoker, newbie, proxy, rest, springsecurity
>         Attachments:
> Hi,
> I am aware of other tickets regarding the proxy invocation issues.
> During development I noticed an exception popping up:
> IllegalArgumentException: object not instance of class
> I narrowed it down to exchange, Object
serviceObject, Method m, Object[] paramArray)
> This kept happening whenever I added a @Secured annotation to a rest method. This annotation
caused a Spring Security AOP Proxy to be passed to the default Invoker (
instead of the original target class. Which is fine.
> The problem (I think) is in the method performInvocation. The serviceObject parameter
is a reference to the Proxy and not the target class causing the line:
> {noformat}
> return m.invoke(serviceObject, paramArray);
> {noformat}
> to fail with the above mentioned error.
> I resolved this by extending JAXRSInvoker and registering it via:
> {noformat}
> <jaxrs:invoker>
>     <bean class=""/>
> </jaxrs:invoker>
> {noformat}
> and overriding the performInvocation method like so:
> {noformat}
> public class SpringSecurityInvokerProxy extends JAXRSInvoker {
>     @Override
>     protected Object performInvocation(Exchange exchange, Object serviceObject, Method
m, Object[] paramArray) throws Exception {
>         paramArray = insertExchange(m, paramArray, exchange);
>         if (serviceObject instanceof Proxy) {
>             try {
>                 return Proxy.getInvocationHandler(serviceObject).invoke(serviceObject,
m, paramArray);
>             } catch (Throwable throwable) {
>                 throw new Exception("Proxy invocation threw an exception", throwable);
>             }
>         } else {
>             return m.invoke(serviceObject, paramArray);
>         }
>     }
> }
> {noformat}
> My reasoning is that you want to call the proxied method (security check) and not the
target method directly but the call through proxies should be done differently.
> I am not saying this is the correct way to invoke proxies but it works for this situation
although I prefer this to be built in the CXF lib.

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