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Dubbo测试 @Autowired和@Resource均无法注入

Pack 发布于 2020-01-20 16:03
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分类：Java开发

问题描述

在对Dubbo进行测试的过程中，启动好了provider，在consumer端，采用ClassPathXmlApplicationContext启动方式。
问题：
直接从context中获取provider的实例是可以获取到的，调用也是成功的；
但是我这里定义了一个TradeService接口，并在TradeServiceImpl类中实现了该接口，类中采用了@Autowire或@Resource方式进行注入，但注入结果均为null，对比了一下公司环境中配置，发现没有什么不同的，请问这里是什么问题呢？有没有人遇到过类似的问题？

环境及代码

  • JDK1.8
  • Dubbo 2.7.3
  • 配置方式：namespace, 即applicatoin.xml

consumer配置：




<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
       http://dubbo.apache.org/schema/dubbo
       http://dubbo.apache.org/schema/dubbo/dubbo.xsd">



<!--应用名称, 用于计算依赖关系-->
    <dubbo:application name="dubbo-example-namespace-consumer" logger="slf4j"/>



<!--注册中心地址-->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" file="dubbo/dubbo-registry/dubbo.cache"/>



<dubbo:protocol name="dubbo" port="20880"/>
    
    <dubbo:reference id="tradeServiceFacade" interface="com.lthaoshao.dubbo.api.TradeServiceFacade"/>



<bean id="orderService" class="com.lthaoshao.dubbo.service.OrderServiceImpl"/>
</beans>




接口：






public interface IOrderService {
    public String createOrder();
}




实现类：






import com.lthaoshao.dubbo.api.TradeServiceFacade;
import com.lthaoshao.dubbo.request.BaseRequest;
import com.lthaoshao.dubbo.response.BaseResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;



@Slf4j
public class OrderServiceImpl implements IOrderService {
    // TODO 疑问点： 此处的tradeServiceFacade为null 
    @Autowired
    private TradeServiceFacade tradeServiceFacade;



public OrderServiceImpl() {
    }
    @Override
    public String createOrder() {
        BaseRequest request = new BaseRequest();
    	request.setRequestId(String.valueOf(System.currentTimeMillis()));
        BaseResponse result = tradeServiceFacade.createOrder(request);
        log.info("response:{}", result);
        return result.getMsg();
    }
}




启动类：






import com.lthaoshao.dubbo.api.TradeServiceFacade;
import com.lthaoshao.dubbo.request.BaseRequest;
import com.lthaoshao.dubbo.response.BaseResponse;
import com.lthaoshao.dubbo.service.IOrderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.support.ClassPathXmlApplicationContext;



@Slf4j
public class DubboConsumerStart {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("application.xml");
        context.start();
        // 1. 直接从context中获取远程服务的实例, 此种方式可以获取到bean
        TradeServiceFacade tradeServiceFacade = context.getBean(TradeServiceFacade.class);
        BaseRequest request = new BaseRequest();
        request.setRequestId(String.valueOf(System.currentTimeMillis()));
        BaseResponse result = tradeServiceFacade.createOrder(request);
        log.info("response:{}", result);



// 2. 通过服务调用, Autowired注入, 此种方式不能获取到实例
        IOrderService orderService = context.getBean(IOrderService.class);
        String order = orderService.createOrder();
        log.info("order:{}", order);
    }
}






                                    

                                

                                

                                

                                

                                

                                

                                

                            

                            

                                

                                    

                                        

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                                                            Pack
                                                        

                                                    
                                                    

                                                        Pack
                                                        
                                                                                                                
                                                        
                                                                                                                

                                                                                                                        
我拉了你的代码，你的pom 似乎有问题，我改为这样







<project xmlns="http://maven.apache.org/POM/4.0.0"



         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"



         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">



    <parent>



        <artifactId>dubbo-example-namespace</artifactId>



        <groupId>com.lthaoshao</groupId>



        <version>1.0-SNAPSHOT</version>



    </parent>



    <modelVersion>4.0.0</modelVersion>







    <artifactId>dubbo-consumer</artifactId>







    <dependencies>



        <dependency>



            <groupId>org.apache.dubbo</groupId>



            <artifactId>dubbo</artifactId>



        </dependency>



        <dependency>



            <groupId>org.apache.dubbo</groupId>



            <artifactId>dubbo-registry-zookeeper</artifactId>



            <version>2.7.0</version>



        </dependency>



        <dependency>



            <groupId>org.apache.dubbo</groupId>



            <artifactId>dubbo-configcenter-zookeeper</artifactId>



            <version>2.7.0</version>



        </dependency>



        <dependency>



            <groupId>com.lthaoshao</groupId>



            <artifactId>dubbo-api</artifactId>



        </dependency>



        <dependency>



            <groupId>org.slf4j</groupId>



            <artifactId>slf4j-api</artifactId>



            <scope>compile</scope>



        </dependency>



        <dependency>



            <groupId>ch.qos.logback</groupId>



            <artifactId>logback-classic</artifactId>



        </dependency>



    </dependencies>







</project>







<project xmlns="http://maven.apache.org/POM/4.0.0"



         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"



         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">



    <parent>



        <artifactId>dubbo-example-namespace</artifactId>



        <groupId>com.lthaoshao</groupId>



        <version>1.0-SNAPSHOT</version>



    </parent>



    <modelVersion>4.0.0</modelVersion>







    <artifactId>dubbo-provider</artifactId>







    <dependencies>



        <dependency>



            <groupId>org.apache.dubbo</groupId>



            <artifactId>dubbo</artifactId>



            <version>2.7.0</version>



        </dependency>



        <dependency>



            <groupId>org.apache.dubbo</groupId>



            <artifactId>dubbo-registry-zookeeper</artifactId>



            <version>2.7.0</version>



        </dependency>



        <dependency>



            <groupId>org.apache.dubbo</groupId>



            <artifactId>dubbo-configcenter-zookeeper</artifactId>



            <version>2.7.0</version>



        </dependency>







        <dependency>



            <groupId>com.lthaoshao</groupId>



            <artifactId>dubbo-api</artifactId>



        </dependency>



        <dependency>



            <groupId>org.slf4j</groupId>



            <artifactId>slf4j-api</artifactId>



        </dependency>



        <dependency>



            <groupId>ch.qos.logback</groupId>



            <artifactId>logback-classic</artifactId>



        </dependency>



    </dependencies>







</project>







改了依赖之后调用是没有问题的。



如果你试了还有问题欢迎私信我

                                                        

                                                        

                                                            
                                                                                                                                                                                    

    

            

            

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                                                                            Pack
                                                                        

                                        提出于 2020-01-20 16:03
                                    

                                

                            

                            

                                

                                    

                                        

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