在异步方法上使用Spring AOP

Question

是否可以将@After和@Async与@Async方法一起使用？
我尝试了两个注释，如下所示：

@Override
@SetUnsetEditingFleet
public void modifyFleet(User user, FleetForm fleetForm) throws Exception{
    databaseFleetsAndCarsServices.modifyFleet(user, fleetForm);
}

@Around("@annotation(SetUnsetEditingFleet) && args(user, fleetForm)")
public void logStartAndEnd(ProceedingJoinPoint pjp, User user, FleetForm fleetForm) throws Throwable{
    fleetServices.setEditingFleet(fleetForm.getIdFleet());
    for(Car car : carServices.findByFleetIdFleet(fleetForm.getIdFleet())){
        carServices.setEditingCar(car.getIdCar());   //Set cars associated with the fleet
    }  
    pjp.proceed();
    fleetServices.unSetEditingFleet(fleetForm.getIdFleet());     
    for(Car car : carServices.findByFleetIdFleet(fleetForm.getIdFleet())){
        carServices.unSetEditingCar(car.getIdCar());    //Unset cars associated with the fleet 
    }
}

@Override
@Async
@Transactional(rollbackFor=Exception.class)
public void modifyFleet(User currentUser, FleetForm fleetForm) throws Exception {
    //method instructions

在方法结束之前调用after部分。 我也尝试了@After和@Before注释，结果是相同的。

你知道有可能吗？

Answer 1

@After无法与@Async一起正常使用，因为该工作尚未完成。 您可以通过为您的异步方法返回CompletableFuture而不是void并使用回调方法处理任何after逻辑来解决此问题。 一个未经测试的示例：

    @Around("@annotation(AsyncBeforeAfter)")
    public void asyncBeforeAfter(ProceedingJoinPoint pjp) throws Throwable{
        // before work
        Object output = pjp.proceed();
        CompletableFuture future = (CompletableFuture) output;
        future.thenAccept(o -> {
           // after work
        });

    }

    @Override
    @Async
    @AsyncBeforeAfter
    @Transactional(rollbackFor=Exception.class)
    public CompletableFuture<String> modifyFleet(User currentUser, FleetForm fleetForm) throws Exception {
      return  CompletableFuture.supplyAsync(() -> {
           //method instructions
           return "done";
     });
    }