Aspect Not Running | Spring-Boot

Question

I have written a jar which contains an Aspect, Please find the classes and xml below:-

package com.foo.bar;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface APILock {
    int lockAtMostFor() ;
    int lockAtLeastFor() default 0;
}

package com.foo.bar.aspect;
@Aspect
@Component
@Slf4j
public class APILockAspect {
    @Around("@annotation(com.foo.bar.APILock)")
    public Object logExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {
       System.out.println("Inside Aspect");
       joinPoint.proceed();
   }
}

spring-boot-aop dependency

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

along with other spring-webflux starters

And I use this jar as an dependency in another boot application, please see my boot application below:-

package com.bla.application;

@Configuration
@EnableAspectJAutoProxy(proxyTargetClass = true)
@SpringBootApplication
@ComponentScan(basePackages = {"com.foo.bar","com.bla"})
public class ReactiveApplication {

    public static void main(String[] args) {
        SpringApplication.run(ReactiveApplication.class, args);
        System.out.println("--------STARTED------------");
    }
}

package com.bla.service;

@Service
public class CityService {
    @Autowired
    private CityRepository cityRepository;

    public Flux<City> getAllEmployees() {
        return cityRepository.findAll();
    }
    @APILock(lockAtLeastFor = 30,lockAtMostFor = 60)
    public Mono<City> updateCity( City city, APILockKey key) {
        try {
        return cityRepository.save(city);
        }catch (Exception e) {
            return Mono.error(e);
        }
    }
}

But when I hit my request for updateCity, it's not executing my aspect(APILockAspect) but directly executing the service logic, can anyone help me find what I am doing wrong?

Answer 1

It looks you've done everything right, but still it doesn't work, so please check the following (it should have been written as a comment, not as an answer, but its too much text, so its still better than nothing :) ):

1. Make sure that the jar with an aspect is not a spring boot application by itself (go to target folder and see that the artifact created out of this jar by maven/gradle does not include stuff like BOOT-INF folder inside. This is because you can't make one spring boot app depend on another.

2. Make sure that the aspect is recognized by spring during the startup: Add a no-op constructor and log something from the aspect / place a breakpoint.