[aspectj-users] LTW on WebSphere 7

[oroger <olivier.roger@xxxxxxxxx>]

Hello AspectJ ! 

I am currently porting some aspects from made for JBoss (4.2.3) on WebSphere
7. 
In the last day I found some article and post on AspectJ/WebSphere issues. 

I think the big part is done since the aspect are deployed and registered in
classloaders. 
One aspect works perfectly, however, for the other one, the pointcut does
not seems to be matched anywhere. 

Here is a log fragment : 

[12/09/11 13:20:56:381 CEST] 00000012 SystemErr     R
[ExtClassLoader@43c043c0] info register aspect
com.xyz.aspects.isSerializableAspect.IsSerializableSessionAspect 
[12/09/11 13:20:56:584 CEST] 00000012 SystemErr     R
[ExtClassLoader@43c043c0] info register aspect
com.xyz.aspects.log4jStackTraceAspect.Log4jStackTraceAspect 
... 
[12/09/11 13:21:30:501 CEST] 00000014 SystemErr     R
[ExtClassLoader@43c043c0] weaveinfo Join point 'method-execution(void
org.apache.log4j.Category.warn(java.lang.Object))' in Type
'org.apache.log4j.Category' (Category.java:1004) advised by before advice
from 'com.xyz.aspects.log4jStackTraceAspect.Log4jStackTraceAspect'
(Log4jStackTraceAspect.aj:39) 

The IsSerializableSessionAspect's pointcut expression is 

execution(public * javax.servlet.http.HttpSession+.setAttribute(..)) &&
args(key,value) 

In fact I am inspecting the HttpSession and verify that all added attribute
can be serialized (very similar to
http://www.beernut.ca/jim/archives/005157.html). 

At the moment the JAR has been placed in
%WAS%/lib/is-serializable-session-1.0-SNAPSHOT.jar!/META-INF/aop.xml.
aop.xml contains the following definition 

<aspectj>

    <weaver options="-Xset:weaveJavaxPackages=true -showWeaveInfo -verbose">
        <include within="*"/>
    </weaver>
    
    <aspects>
        <aspect
name="com.xyz.aspects.log4jStackTraceAspect.Log4jStackTraceAspect" />
    </aspects>

</aspectj>

On JBoss the aspect is woven correctly here is the corresponding log entries
: 

2011-09-12 12:10:46,549 ERROR @ [STDERR] [UnifiedClassLoader3@11d329d]
weaveinfo Join point 'method-execution(void
org.jboss.web.tomcat.service.session.ClusteredSession.setAttribute(java.lang.String,
java.lang.Object))' in Type
'org.jboss.web.tomcat.service.session.ClusteredSession'
(ClusteredSession.java:538) advised by before advice from
'com.xyz.aspects.isSerializableAspect.IsSerializableSessionAspect'
(IsSerializableSessionAspect.aj:36) 
2011-09-12 12:10:46,565 ERROR @ [STDERR] [UnifiedClassLoader3@11d329d]
weaveinfo Join point 'method-execution(void
org.apache.catalina.session.StandardSession.setAttribute(java.lang.String,
java.lang.Object))' in Type 'org.apache.catalina.session.StandardSession'
(StandardSession.java:1254) advised by before advice from
'com.xyz.aspects.isSerializableAspect.IsSerializableSessionAspect'
(IsSerializableSessionAspect.aj:36)
2011-09-12 12:10:46,581 ERROR @ [STDERR] [UnifiedClassLoader3@11d329d]
weaveinfo Join point 'method-execution(void
org.apache.catalina.session.StandardSession.setAttribute(java.lang.String,
java.lang.Object, boolean))' in Type
'org.apache.catalina.session.StandardSession' (StandardSession.java:1277)
advised by before advice from
'com.xyz.aspects.isSerializableAspect.IsSerializableSessionAspect'
(IsSerializableSessionAspect.aj:36)

I was wondering is anyone already tried this on WebSphere or if one of you
had an idea concerning this issue. 

Maybe I should enable a specific weaver option ? Or add the jar to the
classpath using another method ? 

Thanks for your help, 

Olivier

Edit: I am wondering is this is not related to the used classloader. 

>From what I see in the logs, the aspect is registered on 2 class loaders.
But the HttpSession interface comes from the J2EE API library which should
be in the Bootstrap or Classpath Classloader. 

[12/09/11 15:07:02:917 CEST] 00000014 SystemErr     R
[CompoundClassLoader@23ee23ee] info register aspect
com.bsb.rd.aspects.isSerializableAspect.IsSerializableSessionAspect 
... 
[12/09/11 15:07:10:031 CEST] 00000014 SystemErr     R
[ExtClassLoader@47614761] info register aspect
com.bsb.rd.aspects.isSerializableAspect.IsSerializableSessionAspect 
... 

I tried to change Permission in the %was%/java/jre/java.policy file without
success

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