Sonic ESB class hierarchy causing unwanted multiple invocations of aspect

Howdy. I'm trying to use AspectJ with Sonic ESB to intercept calls to the service() method of any custom ESB service. That means I don't know the type of the service class in advance; I only know that it implements interface XQServiceEx. The implemented service() method is invoked by the Sonic container every time a JMS message arrives at the service endpoint. However, the container has a somewhat complex internal structure, and I'm getting three invocations of my advice for each inbound message. (I hope my terminology isn't too far off.)

My aspect looks like this:

package com.ncr.eai.esb.aop;

import com.sonicsw.xq.XQService;
import com.sonicsw.xq.XQServiceEx;
import com.sonicsw.xq.XQServiceContext;
import com.sonicsw.xq.XQServiceException;
import com.ncr.eai.esb.*;

aspect XQServiceAspect {
 final String id = "O : ";

 pointcut serviceCall(XQServiceEx svc, XQServiceContext ctx) :
     call(void XQService.service(XQServiceContext)) &&
     target(svc) &&
     target(com.sonicsw.xq.XQService) &&
//     within(com.ncr..*) &&
     args(ctx);

    before(com.sonicsw.xq.XQServiceEx svc, XQServiceContext ctx): serviceCall(svc, ctx) {
     System.out.println(id + "Entering XQServiceEx.service(): " + thisJoinPointStaticPart.getSignature() + " " + svc + " " + ctx + " " + this);
    }

    void around(com.sonicsw.xq.XQServiceEx svc, XQServiceContext ctx): serviceCall(svc, ctx) {
     System.out.println(id + "In the around() advice before call to XQServiceEx.service(): " + thisJoinPointStaticPart.getSignature() + " " + svc + " " + ctx + " " + this);
     proceed(svc, ctx);
     System.out.println(id + "In the around() advice after call to XQServiceEx.service(): " + thisJoinPointStaticPart.getSignature() + " " + svc + " " + ctx + " " + this);
     }


    after(com.sonicsw.xq.XQServiceEx svc, XQServiceContext ctx) returning: serviceCall(svc, ctx) {
     System.out.println(id + "Returned from XQServiceEx.service(): " + thisJoinPointStaticPart.getSignature() + " " + svc + " " + ctx + " " + this);
    }
}

The output looks like this:

O : Entering XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain@c64bc2 com.sonicsw.xqimpl.service.XQServiceContextImpl@97e765 com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : In the around() advice before call to XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain@c64bc2 com.sonicsw.xqimpl.service.XQServiceContextImpl@97e765 com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : Entering XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain$XQInterceptorServiceWrapper@195638a com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : In the around() advice before call to XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain$XQInterceptorServiceWrapper@195638a com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : Entering XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.ncr.eai.esb.ServiceFromAspect@1510b03 com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : In the around() advice before call to XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.ncr.eai.esb.ServiceFromAspect@1510b03 com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
  >>>> Inside of the actual service() method!
  >>>> About to exit the actual service() method!
O : In the around() advice after call to XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.ncr.eai.esb.ServiceFromAspect@1510b03 com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : Returned from XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.ncr.eai.esb.ServiceFromAspect@1510b03 com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : In the around() advice after call to XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain$XQInterceptorServiceWrapper@195638a com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : Returned from XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain$XQInterceptorServiceWrapper@195638a com.sonicsw.xqimpl.service.XQServiceChain$XQServiceContextWrapper@19c705e com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : In the around() advice after call to XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain@c64bc2 com.sonicsw.xqimpl.service.XQServiceContextImpl@97e765 com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f
O : Returned from XQServiceEx.service(): void com.sonicsw.xq.XQService.service(XQServiceContext) com.sonicsw.xqimpl.service.XQServiceChain@c64bc2 com.sonicsw.xqimpl.service.XQServiceContextImpl@97e765 com.ncr.eai.esb.aop.XQServiceAspect@d8ce8f

I know the results of my experimentation are kind of hard to read here, but each call to service() results in a sequence of three calls from com.sonicsw.xqimpl.service.XQServiceChain, com.sonicsw.xqimpl.service.XQServiceChain$XQInterceptorServ开发者_开发技巧iceWrapper, and com.ncr.eai.esb.ServiceFromAspect. I only want to see one call per message, meaning one call to service(). And I don't know in advance what the name of the third class will be. This test is being run with a custom service named com.ncr.eai.esb.ServiceFromAspect, but there may be dozens of other services that implement XQServiceEx, and I don't want to have to hard-code them; they need to be discovered at run-time. I tried to add the commented out within(com.ncr..*) phrase, but using that prevented the pointcut from working at all. I also tried to exclude com.sonicsw packages with things like !within(com.sonicsw..*), but that also stopped all pointcuts from working.

As far as deployment goes, I've got this aspect jarred up, and I'm doing load-time weaving by adding javaagent to the container command-line. The overall strategy is working, but I have spent longer than I want to admit trying to construct a pointcut that works as desired.

How do I get only one call per message?

Any "advice" appreciated!

Thanks, Lee Grey, SOA Architect NCR

It looks like a decorator pattern going on in there. All you probably need is to use cflowbelow() to avoid advising decorated calls.

 pointcut serviceCall(XQServiceEx svc, XQServiceContext ctx) :
     call(void XQService.service(XQServiceContext)) &&
     target(svc) &&
     target(com.sonicsw.xq.XQService) &&
     args(ctx) &&
     !cflowbelow(call(void XQService.service(XQServiceContext)));