SpringBoot @Async加在实现接口类的非接口方法上获取Bean异常

落日映苍穹つ 2022-10-28 10:15 141阅读 0赞

### 一、场景复现 ###

报错日志

***************************
    APPLICATION FAILED TO START
    ***************************
    
    Description:
    
    A component required a bean of type 'com.mk.service.TestService' that could not be found.
    
    
    Action:
    
    Consider defining a bean of type 'com.mk.service.TestService' in your configuration

@Service
    public class TestService implements ITestService{
        
        @Async
        public Future<String> doActionAsync(){
            
            return new AsyncResult(doAction());
        }
    
        @Override
        public String doAction() {
            
            return "done";
        }
    }
    
    public interface ITestService {
        
        String doAction();
    }
    
    @Component
    public class Runner implements ApplicationContextAware {
    
        @EventListener(ApplicationReadyEvent.class)
        public void run(){
    
            TestService testService = applicationContext.getBean(TestService.class);
            testService.doActionAsync();
        }
    
        private ApplicationContext applicationContext;
    
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            this.applicationContext =applicationContext;
        }
    }
    
    @EnableAsync
    @Configuration
    @SpringBootApplication
    public class ServiceApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(ServiceApplication.class, args);
        }
    
    }

二、分析原因

（1）doActionAsync加上接口方法，执行一样报错

@Service
    public class TestService implements ITestService{
    
        @Override
        @Async
        public Future<String> doActionAsync(){
    
            return new AsyncResult(doAction());
        }
    
        @Override
        public String doAction() {
    
            return "done";
        }
    }

（2）使用ITestService调用就不报错

@Component
    public class Runner implements ApplicationContextAware {
    
        @EventListener(ApplicationReadyEvent.class)
        public void run(){
    
            ITestService testService = applicationContext.getBean(ITestService.class);
            testService.doActionAsync();
        }
    
        private ApplicationContext applicationContext;
    
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            this.applicationContext =applicationContext;
        }
    }

（3）Springboot 代理类型

Springboot 默认代理类型为jdk proxy

bean有实现接口使用jdk proxy代理，没有实现接口则使用cglib代理

### 三、解决方案 ###

（1）将方法抽象到接口

（2）强制使用cglib代理

@EnableAsync(proxyTargetClass = true)
    @Configuration
    @SpringBootApplication
    public class ServiceApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(ServiceApplication.class, args);
        }
    
    }