Question

I'm doing my fist steps with Springs AOP and wanted to start with a simple logging advice. My project is a multi module maven project with the following structure:

parentProject
|__aop
|__data
|__web

The web module has a user service class in the package de.my.awsome.project.web.service with a saveNewUser Method:

@Service
public class UserService {
...
    public MdUser saveNewUser(UserModel user) {
        MdUser newUser = this.save(user);
        createGroupMembership(user, newUser);
        return newUser;
    }
}

The method works as expected so don't bother with details about that.

What I've done now is to create the following class in the aop module:

@Component
@Aspect
public class LoggingAspect {

    Logger logger = Logger.getLogger(getClass());

    @Before("execution(public * de.my.awsome.project.web.service.UserService.saveNewUser(..))")
    public void newUserLog(JoinPoint joinpoint) {
        logger.info(joinpoint.getSignature() + " with user " + joinpoint.getArgs()[0]);
}

}

I added a dependency for the web module in the pom of the aop module:

<dependency>
    <groupId>de.my.awsome.project</groupId>
    <artifactId>web</artifactId>
    <version>${project.version}</version>
</dependency>

I even wrote a ConfigurationClasse even though I thought this would not be necessary with SpringBoot:

@Configuration
@ComponentScan(basePackages="de.fraport.bvd.mobisl.aop")
public class AspectsConfig {

}

The expected result is a log-message like "saveNewUser with user xyz". But the logging method is never called. What have I missed to do?

Answer 1

@Configuration - Indicates that this file contains Spring Bean Configuration for an Aspect.

Replace @Component with @Configuration for LoggingAspect.

Answer 2

好吧，@ sankar发表的答案也不起作用，但我自己找到了解决方法。

我必须在Web模块pom中向我的aop模块添加依赖项，反之亦然。然后，我将AspectsConfig的Import添加到Web模块SpringBootApplication类中，并且可以正常工作。

@SpringBootApplication
@Import(value= {JPAConfig.class, AspectsConfig.class})
@EnableAspectJAutoProxy
public class WebApplication {

@Autowired
private JPAConfig config;

@Autowired
private AspectsConfig aspectConfig;

    public static void main(String[] args) {
        SpringApplication.run(WebApplication.class, args);
    }
}

Answer 3

以下步骤对我有用-如果有人在寻找解决方案，请参见下文

将aop依赖项添加到主父pom.xml

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

在aop子模块中添加您的Aspect实现

   @Aspect
   @Component
   public class SampleAspect {

    @After("execution(* de.my.awsome.project.testMethod())") 
    public void logAuditActivity(JoinPoint jp) { 
     System.out.println("TESTING ****************");
     System.out.println("The method is called");

   }

在您的其他子模块（Web子模块）中添加Aspect-子模块的依赖项

    <dependency>
        <groupId>de.my.awsome.project</groupId>
        <artifactId>aop</artifactId>
    </dependency>

在您的Web项目中，包括用于组件扫描的aop软件包例如。如果SampleAspect在de.my.awsome.project软件包下，则需要添加以下内容

    @ComponentScan(basePackages = {"de.my.awsome.project", "de.my.awsome.aop" }

清理构建并运行应用程序

Spring Boot AOP in multi module project does not execute Before Advice

3 个答案: