@Order注解提供消费顺序

         Order注解可以做到集合bean依赖注入的时候，定义集合内部Bean的加载顺序，因此在需要有序消费bean的时候，不需要再次排序，直接定义好Order注解得value值就好。

         但是这个order值并不影响bean本身实例化的顺序，因为实例化的顺序取决于依赖关系。

         @org.springframework.core.annotation.Order

@RestController
@RequestMapping(value = "/pc/api/v1/monitor")
@RequiredArgsConstructor
public class AfterRepairConsumer {

    private final List<RepairCreatePostConsumer> postConsumers;

    @GetMapping(value = "/create")
    public ResponseData create() {
        final String repairId = "1";
        
        if (CollectionUtils.isNotEmpty(postConsumers)) {
            postConsumers.forEach(e -> e.postHandler(repairId));
        }
        return new ResponseData<>("success");
    }

}


public interface RepairCreatePostConsumer {
    /**
     * 创建报修单后做什么
     *
     * @param repairId 报修单ID
     */
    void postHandler(String repairId);
}



import org.springframework.core.annotation.Order;

@Service
@RequiredArgsConstructor
@Order(value = 3)
public class SendEmail implements RepairCreatePostConsumer {


    @Override
    public void postHandler(String repairId) {
        System.out.println("为报修单" + repairId + "发送邮件");
    }
}

import org.springframework.core.annotation.Order;

@Service
@RequiredArgsConstructor
@Order(value = 2)
public class SendInvoice implements RepairCreatePostConsumer {
    @Override
    public void postHandler(String repairId) {
        System.out.println("为报修单" + repairId + "发送发票");
    }
}

import org.springframework.core.annotation.Order;

@Service
@RequiredArgsConstructor
@Order(value = 1)
public class SendMessage implements RepairCreatePostConsumer {
    @Override
    public void postHandler(String repairId) {
        System.out.println("为报修单" + repairId + "发送消息");
    }
}

运行结果：