[b]Someone could help me step-by-step for the use of Interceptors with a full code implementation?[/b]
I would like use the interceptors but i have several problem because i don't understand well how use it.
For example, after reading
[url=
http://www.adam-bien.com/roller/abien/entry/interceptors_ejb_3_for_absolute]Interceptors (EJB 3) For Absolute Beginners - Or Pragmatic AOP in 2 Minutes (without XML :-))[/url]
I tried this example:
[code]
import javax.ejb.EJB;
public class AppClient {
@EJB
private static MyBean myB;
public static void main(String args[]) {
MyBean myB = new MyBean();
try {
myB.hello();
System.out.println(myB.hello()); // Display the string.
} catch (Exception ex) {
System.out.println("Got some exception");
}
}
}
[/code]
[code]
import javax.interceptor.*;
public class MyInterceptor {
@AroundInvoke
protected Object log(InvocationContext cxt)
throws Exception
{
System.out.println("INTERCEPTOR");
System.out.println("Before: " + cxt.getMethod());
Object value = cxt.proceed();
System.out.println("After: " + cxt.getMethod());
return value;
}
}
[/code]
[code]
import javax.ejb.Stateless;
import javax.interceptor.*;
@Stateless
public class MyBean {
@Interceptors(MyInterceptor.class)
public String hello()
{
return "hello, world";
}
}
[/code]
but everytime I run directly [u]Run file on AppClient[/u] as output i obtain:
[code]
init:
deps-jar:
compile-single:
run-main:
hello, world
BUILD SUCCESSFUL (total time: 0 seconds)
[/code]
I was thinking that on the output i should see even the message present on the interceptor, in this case something similar as :
INTERCEPTOR
Before:
etc..
hello, world
While now i see only the message:
hello, world
So i'm confused and i don't understand the problem and where i'm wrong.
I use Netbeans 6.8 and glassfish 3.
On the attachment there is the project for NetBeans.
Note:
I also see the example present on j2ee 5
interceptor-stateless-ear
[url=
https://glassfish-samples.dev.java.net/files/documents/4742/50661/javaee5-samples-installer-1.0-b10.jar]samples[/url] (226 kb)
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