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
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