I want to use interceptors in a Java-SE application and I am using weld as CDI implementation and i'm testing this here:
The Main-Class:
public static void main(String[] args) {
WeldContainer weldContainer = new Weld().initialize();
Service service = weldContainer.instance().select(Service.class).get();
service.methodCall();
service.methodCallNumberTwo();
}
The Service-Class:
public class Service {
@TestAnnotation
public void methodCall(){
System.out.println("methodCall...!");
methodCallNumberTwo();
}
@TestAnnotation
public void methodCallNumberTwo(){
System.out.println("methodCallNumberTwo...!");
}
}
The Interceptor-Class:
@Interceptor
@TestAnnotation
public class TestInterceptor {
@AroundInvoke
public Object interceptorMethod(InvocationContext invocationContext) throws Exception {
System.out.println("I'm the TestInterceptor of "+invocationContext.getMethod());
return invocationContext.proceed();
}
}
Aaaand the output:
I'm the TestInterceptor of public void Service.methodCall()
methodCall...!
methodCallNumberTwo...!
I'm the TestInterceptor of public void Service.methodCallNumberTwo()
methodCallNumberTwo...!
My Questions
First: Why isn't the interceptor called in methodCall() when i'm calling methodCallNumberTwo()?
Second: Is there a way to change that?
I'm only studying the behavior of interceptors and want to understand. Thank you in advance!
The interceptor is not called because you are calling it on the same instance of the object. If you're familiar with EJBs it's the same as calling a method on the same object instead of through the EJB context.
If you debug through it you'll notic that the method call on the injected objects goes through a proxy. The method call from methodOne to methodTwo isn't proxied.
来源：https://stackoverflow.com/questions/17628405/why-is-the-interceptor-not-called-in-the-same-service-class