How could convert/implement spring aop function by annotation

Question

I want to log time spent to log file when invoke some service methods , now I implement it by AOP, e.g.

@Around("execution(* sample..TaskService.*(..))")
public Object aroundStat(ProceedingJoinPoint joinPoint) throws Throwable {
    long start = System.currentTimeMillis();

    Object proceed = joinPoint.proceed();

    long end = System.currentTimeMillis();
    String methodName = joinPoint.getSignature().getName();
    log.info("{} taken time: {} ms",methodName,(end-start));
    return proceed;
}

but I want to know how could implement it by using Annotation just like @Trasactional, e.g.

@Service
@TimeLogging
public class TaskService {
    @TimeLogging
    List<TaskStatDTO> taskStatusStat(String name){
        //...
    }

    List<TaskStatDTO> finishedTaskStat(String name){
        //...
    }
    //...
}

Could I implement some class and override some method?

Answer 1

1. don't use system time for measure time execution , use StopWatch from spring or apache. see good example - Measure execution time in Java – Spring StopWatch Example and spring api StopWatch

long start = System.currentTimeMillis();    
long end = System.currentTimeMillis();    
(end-start)

change to

StopWatch watch = new StopWatch();
watch.start();
..... execution
watch.stop();
watch.getTotalTimeMillis()

2. instead of

@Around("execution(* sample..TaskService.*(..))")

use

@Around("execution(* sample..TaskService.(..) && @annotation( sample...TimeLogging)")

see Advice parameters

better : see Combining pointcut expressions and Sharing common pointcut definitions

@Pointcut("execution(@annotation(* sample...TimeLogging)")
private void withTimeExecutionLayer() {}

@Pointcut("execution(public *sample..service.* *(..))")
privatr void inServiceLayer() {}

@Pointcut("inServiceLayer() && withTimeExecutionLayer()")
private void auditTimeExecutionServiceLayer() {}