Spring AOP: Getting parameters of the pointcut annotation

Question

Consider I have defined the following aspect:

@Aspect public class SampleAspect {      @Around(value="@annotation(sample.SampleAnnotation)")     public Object display(ProceedingJoinPoint joinPoint) throws Throwable {         // ...     } } 

and the annotation

public @interface SampleAnnotation {     String value() default "defaultValue"; } 

Is there a way to read the value parameter of the annotation SampleAnnotation in the display method if my aspect?

Thanks for your help, erik

Answer 1

Change the advice signature to

@Around(value="@annotation(sampleAnnotation)") public Object display(ProceedingJoinPoint joinPoint, SampleAnnotation sampleAnnotation ) throws Throwable {     // ... } 

and you will have access to the value in the annotation.

See docs for more info.

Answer 2

Bellow I'll add a complete example of AOP implementation where I'll getting parameter from my Custom pointCut annotation, where my advice aim to calculate the time execution of a function:

1- Custom Annotation:

@Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface AnnotationLogExecutionTime {      public boolean isActivate() default false;  } 

2- Controller:

@AnnotationLogExecutionTime(isActivate = true) @PostMapping("/connection") public HttpEntity<String> createAuthenticationToken(HttpServletRequest request,                                                         @RequestBody AuthenticationRequest authenticationRequest) {...} 

3- Advice

@Component @Aspect public class LoggingExecutionTimeAdvice {      @Around("@annotation(annotationLogExecutionTime)")     public Object logExecutionTime(ProceedingJoinPoint joinPoint, AnnotationLogExecutionTime annotationLogExecutionTime) throws Throwable {          if(annotationLogExecutionTime.isActivate()){//Here I recover the value!!!!             long start = System.currentTimeMillis();             Object proceed = joinPoint.proceed();             long executionTime = System.currentTimeMillis() - start;             System.out.println(joinPoint.getSignature() + " executed in " + executionTime + "ms");             return proceed;         }         Object proceed = joinPoint.proceed();         return proceed;     } } 

Explanation:

Our advice (logExecutionTime) will be excuted around (joinPoint) the function that will be annotated with AnnotationLogExecutionTime (our custom annotation) so I want to active or not this the calculation of time execution so I'll get the value from the membre of our custom annotation (which you ask about ;) )