모든 REST 컨트롤러 메서드 요청에 대해 @Around 조언을 추가 한 후 JSON 데이터를 반환하지 않습니다.

모든 REST 컨트롤러 메서드 요청에 대해 @Around 조언을 추가 한 후 JSON 데이터를 반환하지 않습니다.

1. 질문(문제점):

REST Controller 메서드를 구현했으며 구현 된 측면이 없을 때 제대로 작동합니다. 측면을 구현 한 후에도 컨트롤러 메서드는 여전히 백그라운드에서 잘 실행되지만 (즉, DELETE 요청이 실제로 항목을 삭제함) Postman으로 응답을 테스트 할 때 응답을받지 못합니다. Aspect가 작동하고 메소드가 호출되면 txt 파일이 업데이트됩니다.

@RestController
public class MovieScreeningREST {

@Autowired
private MovieScreeningService movieScreeningService;


@GetMapping("/movies")
public List<MovieScreening> findAll(){
    return movieScreeningService.findAll();
}

@GetMapping("/movies/genre={movieGenre}")
public List<MovieScreening> findAllByMovieGenre(@PathVariable String movieGenre){
    return movieScreeningService.findAllByMovieGenre(movieGenre);
}

@GetMapping("/movies/minimum-tickets={amount}")
public List<MovieScreening> findAllByTicketsSoldGreaterThanEqual(@PathVariable int amount){
    return movieScreeningService.findAllByTicketsSoldGreaterThanEqual(amount);
}

@GetMapping("/movies/maximum-screenings={amount}")
public List<MovieScreening> findAllByScreeningsNumberLessThanEqual(@PathVariable int amount){
    return movieScreeningService.findAllByScreeningsNumberLessThanEqual(amount);
}

@GetMapping("/movies/id={id}")
public MovieScreening findById(@PathVariable int id){
    return movieScreeningService.findById(id);
}

@PostMapping("/movies")
public MovieScreening addMovieScreening(@RequestBody MovieScreening movieScreening){
    return movieScreeningService.save(movieScreening);
}


@PutMapping("/movies")
public MovieScreening editMovieScreening(@RequestBody MovieScreening movieScreening){
    return movieScreeningService.save(movieScreening);
}

@DeleteMapping("/movies/id={id}")
public String deleteMovieScreening(@PathVariable int id){
    return movieScreeningService.deleteById(id);
}

}

Aspect 클래스

@EnableAspectJAutoProxy
@Aspect
@Component
public class Logger {

@Pointcut("execution(* asss.pj.projekat_bioskop.controller.*.*(..))")
public void allRESTMethods(){};


@Around("allRESTMethods()")
public void blabla(ProceedingJoinPoint pjp) {
    //@Before
    String methodName = pjp.getSignature().getName();
    String before = "*** Attempting " + methodName + " method ***";
    writeLog(before);

    try {
        //@AfterReturning
        pjp.proceed();

        String success = "\n*** Method " + methodName + " has succeeded";
        writeLog(success);
    } catch (Throwable throwable){
        //@AfterThrowing
        String failed = "\n*** Method " + methodName
                + " has failed. " + throwable.getMessage() + " .***";
        writeLog(failed);
    }

    //@After
    String after = "\n";
    writeLog(after);
}


public void writeLog(String log){

    File file = new File("filmovi_izvestaj.txt");
    try (Writer wr = new FileWriter(file, true)){
        wr.write(log);
    } catch(FileNotFoundException fe){
        fe.printStackTrace();
    } catch(IOException ioe){
        ioe.printStackTrace();
    }
}

}

우편 집배원

2. 해결방안:

@Around Advice

주위 어드바이스에 의해 반환 된 값은 메서드 호출자가 보는 반환 값입니다.

귀하의 조언은 호출 메서드가 실제 반환 값을 얻는 것을 방해하는 것을 반환하지 않습니다. Object흐름을 올바르게 완료 하기 위해 돌아가 도록 주위 조언 방법을 수정하십시오 .

예

@Around("allRESTMethods()")
public Object blabla(ProceedingJoinPoint pjp) {
    //@Before
    String methodName = pjp.getSignature().getName();
    String before = "*** Attempting " + methodName + " method ***";
    writeLog(before);
    Object retVal = null;
    try {
        //@AfterReturning
       retVal = pjp.proceed();

        String success = "\n*** Method " + methodName + " has succeeded";
        writeLog(success);
    } catch (Throwable throwable){
        //@AfterThrowing
        String failed = "\n*** Method " + methodName
                + " has failed. " + throwable.getMessage() + " .***";
        writeLog(failed);
    }

    //@After
    String after = "\n";
    writeLog(after);
    return retVal;
}

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