Pointcut or Aspect Around All Service Methods with Annotation @Transactional(readOnly = false)

Question

Is it possible to use Spring AOP or AspectJ to intercept all Service methods (contained in classes in the com.app.service.* package) having the annotation

@Transactional(readOnly = false)

(other elements possible as well in Spring's @Transactional annotation, but we only care about readOnly = false ).

I could only find examples pertaining to pointcuts with simple Annotations, or @Annotation(value) .

My preference would be to use straight Spring, if possible.

It would probably be something like the below, but not sure about the syntax.

@Around("execution(* com.app.service..*.*(..))" && @Transactional[??])

Answer 1

Unfortunately no easy way to do that. Even when we have an Annotation-based pointcut, eg

@Aspect
@Component
@EnableAspectJAutoProxy
public class WriteTransactionAspectBean {

    @Before("@annotation(org.springframework.transaction.annotation.Transactional)")
    public void test(org.springframework.transaction.annotation.Transactional t) {
        System.out.println("TEST");
    }

}

the issue is the Annotations aren't our own, they come from an external JAR (Hibernate). This would require Load-Time Weaving or some other difficult workaround.

Aspectj: intercept method from external jar

But to make things even worse, Annotations need RetentionPolicy=RUNTIME in order to be "discovered" by Pointcuts. And we would need to go thru every method and add this specification to every @Transactional . There's no way to automatically make all @Transactional 's Runtime-retainable in the application.

Answer 2

您要使用这样的切入点：

execution(@org.springframework.transaction.annotation.Transactional(readOnly = false) * com.app.service..*.*(..))