JBoss 4 with JBoss AOP V1.0

[suding1]

Hello,

I am trying to use the AOP as follows, but it is not working for me. I would appreciate any advice.

My environment is:
JBoss 4
The Teller WebService example is working fine.
I want to print a notification whenever one of the TellerBean methods is working.
I deployed the AOP.
I added a file named: TestAOP-aop.xml to the
jboss-4.0.0\server\default\deploy\jboss-aop.deployer folder.
Its content is:

<aop>
 <aspect class="com.test.TestAspect" scope="PER_VM"/>

 <pointcut expr="execution(public java.lang.String[] com.jboss.ebank.TellerBean->getAccountsOfCustomer(java.lang.String))" name="getAccountsOfCustomer"/>
 <bind pointcut="getAccountsOfCustomer">
 <advice aspect="com.test.TestAspect" name="trace1"/>
 </bind>

 <pointcut expr="execution(public com.jboss.ebank.TellerBean->new(..))" name="TellerBeanConst"/>
 <bind pointcut="TellerBeanConst">
 <advice aspect="com.test.TestAspect" name="trace2"/>
 </bind>
</aop>

I put a jar with the Aspect program at the
jboss-4.0.0\server\default\deploy folder. Its content is:

public class TestAspect {

 //Advice 1: Trace methods invocation
 public Object trace1(MethodInvocation invocation)
 throws Throwable {
 try {
 System.out.println("TestAspect: trace: START of "+invocation.getMethod());
 return invocation.invokeNext();
 } finally {
 System.out.println("TestAspect: trace: END of "+invocation.getMethod());
 }
 }

// Advice 2: Trace constructors invocation
 public Object trace2(ConstructorInvocation invocation)
 throws Throwable {
 try {
 System.out.println("TestAspect: trace: START of "+invocation.getConstructor());
 return invocation.invokeNext();
 } finally {
 System.out.println("TestAspect: trace: END of "+invocation.getConstructor());
 }
}



}

I set the jboss-4.0.0\server\default\deploy\jboss-aop.deployer\META-INF\jboss-service.xml file to be:

<server>

 <mbean code="org.jboss.aop.deployment.AspectManagerService"
 name="jboss.aop:service=AspectManager">
 <attribute name="EnableTransformer">true</attribute>
 <attribute name="SuppressTransformationErrors">true</attribute>
 <attribute name="Optimized">true</attribute>
 <attribute name="Verbose">true</attribute>
 </mbean>

 <mbean code="org.jboss.aop.deployment.AspectDeployer"
 name="jboss.aop:service=AspectDeployer">
 </mbean>

</server>

Thanks

[fredatwork]

Ok. Let's assume that I would fix a possible bug, then test it with the testsuite, and finally contribute it to the cvs.
Is that it? After that the small piece of code would be part of future stable releases? (assuming it doesn't break anything) 8-\

[kabirkhan]

Hi,

Please take a look at the "injboss" tutorial example for an example of how to package aop apps to be run in JBoss.

Cheers,

Kabir

[suding1]

Hi Kabir,

Thank you, I read the document, but I still need some help.
My goal is to create "statistics" interceptor, that will count how many time a specific method has been called. - The specific method/methods should be configurable, and most of the times, they will be part of applications which I cannot recompile or even re-package.

I thought it would be possible to have a generic interceptor that will perform the counting, and that the watched methods will be configured via the *-aop.xml file.
Is it possible at all?
If so, please help me to understand how exactly I should set the App Server and the *-aop.xml file. I attached the "statistics" interceptor and the other configuration files at my first email.

Thanks for your patient
SuDing

[suding1]

Well, It is working now.

I changed the *-aop.xml file to be:

<aop>

 <bind pointcut="execution(* com.jboss.ebank.TellerBean->*(..))">
 <interceptor class="com.test.TestInterceptor"/>
 </bind>



</aop>

The Interceptor class is:

public class TestInterceptor implements Interceptor
{
 public String getName() {
 return "TestInterceptor";
 }

 public Object invoke(Invocation invocation) throws Throwable
 {
 try
 {
 MethodInvocation mi = (MethodInvocation)invocation;
 System.out.println("@@@ Start TestInterceptor for: " + mi.getMethod().toString());
 return invocation.invokeNext();
 }
 finally
 {
 System.out.println("@@@ End TestInterceptor");
 }
 }
}

I created a jar file that includes the TestInterceptor class, and put it under the jboss-4.0.0\server\default\lib folder. (I am using the default server)

I added the following system property definition to the JBoss run.bat:
set JAVA_OPTS=%JAVA_OPTS% -Djboss.aop.path=%JBOSS_HOME%\server\default\deploy\jboss-aop.deployer

Thanks
SuDing

[fredatwork]

Kabir made a reference to a 'injboss' tutorial.

Where is this tutorial that may help me ? An URL zould be appreciated.

Fred


--->
Hi,

Please take a look at the "injboss" tutorial example for an example of how to package aop apps to be run in JBoss.

Cheers,

Kabir

[kabirkhan]

You can access the docs here: http://www.jboss.org/docs/index#aop

If you have downloaded the distribution, it is under:

jboss-aop_1.0.0-FINAL/docs/aspect-framework/examples/injboss

Kabir

[fredatwork]

Kabir,

I installed the 'injboss' example and built it successfully (running 'ant deploy-ear-aop').

Hozever, JBoss fails deploying the resulting ear file. It's missing a class ClassFileFilter :
java.lang.NoClassDefFoundError: org/jboss/util/file/ClassFileFilter

For your information, I'm running JBoss 4.0.0 RC2 with 'default' configuration. As requested, I modified ${JBOSSS_HOME}\server\default\deploy\jboss-aop-jdk50.deployer\META-INF\jboss-service.xml to turn loadtime transformations on :
true

Any idea what I'm missing ?

Fred

[kabirkhan]

Use the proper JBoss 4.0 release and not the RC2 one.

Kabir