Spring Boot application context broken when adding AOP advices

Question

I'm trying to use the code in this question, as base for my own AOP logging. However, when I add the advices, the application context no longer loads.

@Aspect
@Component
public class MyLogger {

    /** Handle to the log file */
    private final Log log = LogFactory.getLog(getClass());

    public MyLogger () {}

    @AfterReturning("execution(* org.my.package.*.*(..))")
    public void logMethodAccessAfter(JoinPoint joinPoint) {
        log.info("***** Completed: " + joinPoint.getSignature().getName() + " *****");
        System.out.println("***** Completed: " + joinPoint.getSignature().getName() + " *****");
    }

    @Before("execution(* org.my.package.*.*(..))")
    public void logMethodAccessBefore(JoinPoint joinPoint) {
        log.info("***** Starting: " + joinPoint.getSignature().getName() + " *****");
        System.out.println("***** Starting: " + joinPoint.getSignature().getName() + " *****");
    }
}

Exception stack, a whole bunch of Could not autowire field:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.xxxxxx.UserService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1119)

UserService is a completely unrelated class, and everything runs again if I comment out the methods annotated with @AfterReturning and @Before.

AOP dependencies are there:

[INFO] +- org.springframework.boot:spring-boot-starter-data-jpa:jar:1.3.0.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-aop:jar:1.3.0.RELEASE:compile

Any idea why this happens? I don't even know where to start looking.

Answer 1

Your bean UserService is now a proxy and doesn't match the required type for injection. Possible workaround:

• Create an interface UserService and a service class that implement the interface
• Enable CGLIB based proxy (@EnableAspectJAutoProxy(proxyTargetClass=true))
• Weave aspect at compile time.