Intercepting method with Spring AOP using only annotations
- by fish
In my Spring context file I have something like this:
<bean id="userCheck" class="a.b.c.UserExistsCheck"/>
<aop:config>
<aop:aspect ref="userCheck">
<aop:pointcut id="checkUser"
expression="execution(* a.b.c.d.*.*(..)) && args(a.b.c.d.RequestObject)"/>
<aop:around pointcut-ref="checkUser" method="checkUser"/>
</aop:aspect>
</aop:config>
a.b.c.UserExistsCheck looks like this:
@Aspect
public class UserExistsCheck {
@Autowired
private UserInformation userInformation;
public Object checkUser(ProceedingJoinPoint pjp) throws Throwable {
int userId = ... //get it from the RequestObject passed as a parameter
if (userExists(userId)) {
return pjp.proceed();
} else {
return new ResponseObject("Invalid user);
}
}
And the class that is being intercepted with this stuff looks like this:
public class Klazz {
public ResponseObject doSomething(RequestObject request) {...}
}
This works. UserExistCheck is executed as desired before the call is passed to Klazz. The problem is that this is the only way I got it working. To get this working by using annotations instead of the context file seems to be just too much for my small brain. So... how exactly should I annotate the methods in UserExistsCheck and Klazz? And do I still need something else too? Another class? Still something in the context file?
