method-pointcut Problem

[muneendra78]

Hi

I am i am trying to use Jboss AOP with simple method-pointcut
i have written two Interceptor`s namely Logging and Tracing ..

Please find my Intreceptors here


import org.jboss.aop.*;
import java.lang.reflect.*;

public class Tracing implements Interceptor {

public String getName() {
return "TracingInterceptor";
}

public InvocationResponse invoke(Invocation invocation) throws Throwable{
String message = null;

if(invocation.getType() == InvocationType.METHOD) {

MethodInvocation method = (MethodInvocation)invocation;
message = "method: " + method.method;

}else if (invocation.getType() == InvocationType.CONSTRUCTOR){

ConstructorInvocation c = (ConstructorInvocation)invocation;
message = "constructor: " + c.constructor;

}else{
return invocation.invokeNext();
}

System.out.println("Entering :"+ message);

// Continue on. Invoke the real method or constructor.
InvocationResponse rsp = invocation.invokeNext();
// System.out.println("Leaving :"+ message);
return rsp;
}
}


import org.jboss.aop.*;
import java.lang.reflect.*;


public class Logging implements Interceptor {

public String getName(){
return "Logging";
}

public InvocationResponse invoke(Invocation invocation) throws Throwable {

String logging = null;

if(invocation.getType() == InvocationType.METHOD) {
MethodInvocation method = (MethodInvocation) invocation;
System.out.println("Method Logging");

}else if(invocation.getType() == InvocationType.CONSTRUCTOR){
ConstructorInvocation con = (ConstructorInvocation) invocation;
System.out.println("Constructor Logging");
}else {
//return invocation.invokeNext();
}

return invocation.invokeNext();
}
}

Jboss-AOP.xml

<?xml version="1.0" encoding="UTF-8"?>




<method-pointcut class="POJO" methodName="hello.*">


<interceptor-ref name="Log"/>

</method-pointcut>





public class POJO {

private int counter = 0;

public POJO(){ }

public void helloWorld() {
System.out.println("Testing JBoss-AOP");
}

public static void main(String[] args){
POJO c = new POJO();
c.helloWorld();

}
}



I am using JDK-1.4.1
and jboss-aop-DR2



When i run My POJO class i am getting the following exception

ava.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.aop.standalone.SystemClassLoader.initialize(SystemClassLoader.java:453)
at org.jboss.aop.standalone.SystemClassLoader.loadClass(SystemClassLoader.java:156)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
aused by: java.lang.NullPointerException
at org.jboss.aop.AspectXmlLoader.deployMethodPointcut(AspectXmlLoader.java:262)
at org.jboss.aop.AspectXmlLoader.deployXML(AspectXmlLoader.java:683)
at org.jboss.aop.AspectXmlLoader.deployXML(AspectXmlLoader.java:818)
... 8 more
xception in thread "main" java.lang.Error: Error deploying aop configrations
at org.jboss.aop.standalone.SystemClassLoader.initialize(SystemClassLoader.java:459)
at org.jboss.aop.standalone.SystemClassLoader.loadClass(SystemClassLoader.java:156)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
aused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.aop.standalone.SystemClassLoader.initialize(SystemClassLoader.java:453)
... 3 more
aused by: java.lang.NullPointerException
at org.jboss.aop.AspectXmlLoader.deployMethodPointcut(AspectXmlLoader.java:262)
at org.jboss.aop.AspectXmlLoader.deployXML(AspectXmlLoader.java:683)
at org.jboss.aop.AspectXmlLoader.deployXML(AspectXmlLoader.java:818)


can some body help to come out of this

Thanks and Regards
Muneendra

[bill.burke]

Seems to be a bug in the code. I can give you a fix here:


Before org.jboss.aop.AspectXmlLoader line 262 add:

if (attr != null && attr.trim().equals(""))
{
attr = null;
}


FYI, DR3 release this month.

Bill

[muneendra78]

Dear Bill,

Thanks for your fix ..

Regards
Muneendra

[muneendra78]

HI Bill,

Same problem seems to exists with field-point cut also..

i have tested the same peace of coding adding at File point cut .. its works..

hope this will be fixed new release which is expected soon

Regards
Muneendra