dubbo整合springcloud实现RPC远程调用

矫情吗；* 2023-10-12 13:27 26阅读 0赞

本项目是基于nacos作为注册中心实现的dubbo实现RPC远程调用，没有接触到nacos的小伙伴可以先对nacos进行学习。

项目目录结构

![10f2e8f272bc4fa5b335c3a8a88613fd.png][]

父项目的pom文件

<properties>
            <java.version>1.8</java.version>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
        </properties>
    
        <modules>
            <module>springcloud-dubbo-sample-api</module>
            <module>springcloud-dubbo-sample-provider</module>
            <module>springcloud-dubbo-sample-consumer</module>
        </modules>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-dependencies</artifactId>
                    <version>${spring-boot.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

统一访问接口API

public interface ISayHelloService {
        String sayHello();
    }

provide服务提供者

pom文件

<dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
    
    
    
    
    
            <dependency>
                <groupId>com.jgh</groupId>
                <artifactId>springcloud-dubbo-sample-api</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-dubbo</artifactId>
                <version>2.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>2.2.1.RELEASE</version>
            </dependency>
        </dependencies>

暴露接口

import com.jgh.dubbo.service.ISayHelloService;
    import org.apache.dubbo.config.annotation.Service;
    
    
    /**
     * @program: dubbo-springcloud-example
     * @description:
     * @author: 是小浩呀~
     * @create: 2023-06-10 09:10
     **/
    @Service
    public class sayHelloServiceImpl implements ISayHelloService {
    
        public String sayHello() {
    
            return "hello~!!!!";
        }
    }

注意：此处的@Service注解不是spring官方加载spring容器的bean配置的Service，而是dubbo用来暴露服务的Service注解

application.properties配置文件（nacos配置成自己的nacos地址）

spring.application.name=spring-cloud-dubbo-sample-provider
    
    dubbo.scan.base-packages=com.jgh.dubbo.service.impl
    
    dubbo.protocol.port=20882
    dubbo.protocol.name=dubbo
    
    spring.cloud.nacos.discovery.server-addr=192.168.56.1:8848

springboot启动类

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    /**
     * @program: dubbo-springcloud-example
     * @description:
     * @author: 是小浩呀~
     * @create: 2023-06-10 09:26
     **/
    @EnableDiscoveryClient
    @SpringBootApplication
    public class App {
        public static void main(String[] args) {
            SpringApplication.run(App.class,args);
        }
    }

consumer服务消费者

pom文件

<dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-dubbo</artifactId>
                <version>2.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>2.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>com.jgh</groupId>
                <artifactId>springcloud-dubbo-sample-api</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
        </dependencies>

application.properties文件

spring.application.name=spring-cloud-dubbo-sample-consumer
    
    spring.cloud.nacos.discovery.server-addr=192.168.56.1:8848

springboot启动类

为了方便，直接在启动类上添加测试接口@RestController，请各位自行优化

import com.jgh.dubbo.service.ISayHelloService;
    import org.apache.dubbo.config.annotation.Reference;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * @program: dubbo-springcloud-example
     * @description:
     * @author: 是小浩呀~
     * @create: 2023-06-10 09:45
     **/
    @RestController
    @SpringBootApplication
    public class App {
        public static void main(String[] args) {
            SpringApplication.run(App.class,args);
        }
    
        @Reference
        ISayHelloService sayHelloService;
    
        @GetMapping("/say")
        public String say(){
            String s = sayHelloService.sayHello();
            return s;
        }
    }

其中，@Reference是获取服务提供者注册在nacos的服务，该过程使用动态代理的方式实现。

最后最后，先启动provide，在启动consumer。然后就能成功的调用啦。。。

[10f2e8f272bc4fa5b335c3a8a88613fd.png]: https://img-blog.csdnimg.cn/10f2e8f272bc4fa5b335c3a8a88613fd.png