Exception handling with AOP

[litterat]

Hi
I would like to be able to catch excpetions in my application process it and then rethrow application spectific exception
Something like Spring do with Hibernate excption

I would like to have one Exception "Brain" which process any excpetion's type and then create an excpetion from the application specifc exception tree

I would like to be able to catch unchecked excption and checked excpetions
and to be able to throw unchecked excption

is it possible doing AOP?
Do I need to proxy every object I want this behaver to apply to?

Thanks in advance

[litterat]

I use an around advisor

public class SomeMethodInteceptor implements MethodInterceptor {

  public Object invoke(MethodInvocation methodInvocation) throws Throwable {
        Object result = null;
        try {
            result = methodInvocation.proceed();
        } catch (Exception e) {
           doSomething(e);
        }
        return result;
    }
}

I used this configuration

	<bean name="SomeMethodInteceptor"
		class="SomeMethodInteceptor class">
	</bean>
	<bean
		class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
		<property name="beanNames">
			<value>beanPrefix*</value>
		</property>
		<property name="interceptorNames">
			<list>
				<value>SomeMethodInteceptor</value>
			</list>
		</property>
	</bean>

and that is it
Can you share your thought about this solution?

[wpoitras]

Actually its possible with Spring 1.2 as well. Just requires a little more XML using the right BeanPostProcessor that does auto proxying.

[wpoitras]

Hi
I would like to be able to catch excpetions in my application process it and then rethrow application spectific exception
Something like Spring do with Hibernate excption

is it possible doing AOP?
Do I need to proxy every object I want this behaver to apply to?

If you are using just Spring AOP you do indeed need to proxy each object. However, Spring 2.0+ has easy ways of doing that. You can specify all of your objects normally and then use the aop tags to use a pointcut expression to name all of the objects you want to apply your advise to. The proxying is done automatically.