CODEWITHSUNDEEP
javaaspectjspring-aop
Haven Lin
Haven Lin

Reputation: 176

Pass method parameter with custom annotation of AOP

I have defined annotation with
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)

When I use custom annotation under method which i want to aspect, and then i want to get the parameters(they are Object, not string, int ant byte) of the method signature.

is there simple way to get method parameter with custom annotation of AOP?

Upvotes: 0

Views: 2297

Answers (2)

Hearen
Hearen

Reputation: 7828

A simple demo can as:

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MethodTimer {
}

And the aspect handler:

@Aspect
@Slf4j
@Component
public class TimeCounterAspect {
    @Around("@annotation(methodTimer)")
    public Object logMethodRequests(ProceedingJoinPoint joinPoint, MethodTimer methodTimer)
            throws Throwable {
        Long start = System.currentTimeMillis();
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod();
        String methodName = method.getName();
        Object[] myArgs = joinPoint.getArgs();
        Object obj = null;
        try {
            obj = joinPoint.proceed();
        } catch (Exception e) {
            throw e;
        } finally {
                log.info("Retrieving timeCost: {} ms in Method: {} args: {}",
                System.currentTimeMillis() - start, methodName, Arrays.deepToString(myArgs));
        }
        return obj;
    }
}

Upvotes: 1

Mạnh Quyết Nguyễn
Mạnh Quyết Nguyễn

Reputation: 18235

You can access the arguments via ProceedingJoinPoint:

@Around("execution(@com.path.annotation.YourAnnotation * *(..)) && @annotation(annotation)")
public Object execute(final ProceedingJoinPoint pjp, final YourAnnotation annotation) throws Throwable {
    Object result = pjp.proceed();
    // Here is the method arguments
    Object[] args = pjp.getArgs();

    return result;
}

Upvotes: 0

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