Hello everybody,
I'm totally new to AOP and i wish to made my first steps in this world.
I'm using Eclipse 3.0.2, jdk 1.4.2, AOP 1.3.4.
I wish to be able to run AOP code in loadtime mode, weaving aspects on
pre-existing Java Application.
Let's say I have developed the classical program Hello(World): I already have a
"World.jar" file containing the .class file corresponding to the following
simple class:
| package org.test;
|
| public class World {
|
| public static void main(String[] args) {
| new World().callMe();
| }
|
| public static void callMe(){
| System.out.println("Word!");
| }
| }
|
I have created a AOP project in Eclipse, and i have added the World.jar to the
classpath.
In this AOP project i wrote the following interceptor:
| package org.test.aop;
|
| import org.jboss.aop.advice.Interceptor;
| import org.jboss.aop.joinpoint.Invocation;
|
| public class HelloInterceptor implements Interceptor {
|
| public String getName() {
| return "HelloInterceptor";
| }
|
| public Object invoke(Invocation invocation) throws Throwable {
| System.out.print("Hello, ");
| return invocation.invokeNext();
| }
| }
|
Then i wrote in the jboss-aop.xml file of the AOP project the following lines
| <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
| <aop>
| <pointcut expr="execution(public static void
com.tilab.test.World->callMe())" name="callMe"/>
| <bind pointcut="execution(public static void
com.tilab.test.World->callMe())">
| <interceptor class="org.test.aop.HelloInterceptor"/>
| </bind>
| </aop>
|
At last, i setted a AOP launch configuration for my AOP project, specifying as
the Main class org.test.World. In the VM arguments i can see the correct path
to the jboss-aop.xml file.
But when i try to execute this AOP project the only output is "World!", hence
the interceptor not is called.
Why? How can I correct this configuration?
Thanks in advance,
Paolo
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