《Spring Cloud Alibaba实战》系列-集成dubbo实现远程RPC调用，以nacos作为注册中心

超、凢脫俗 2022-09-14 02:38 179阅读 0赞

本文是Spring Cloud场景下使用Dubbo远程调用，以Nacos替换Zookeeper为注册中心的案例，如果单纯Dubbo融合Nacos作为注册中心，请参考 ☞[官方文档][Link 1]；对Nacos不了解的可以参考之前☞[Nacos文章][Nacos]；

### 1. Maven依赖 ###

首先增加依赖版本统一管理

<properties>
            
            <spring-cloud.version>Hoxton.RELEASE</spring-cloud.version>
            <alibaba-cloud.version>2.2.0.RELEASE</alibaba-cloud.version>
        </properties>
     <dependencyManagement>
            <dependencies>
                
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
                
                <dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>${alibaba-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

增加Dubbo、nacos依赖

<dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-dubbo</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>

### 2. 提供服务方\[provider\] ###

yaml配置文件

spring:
      application:
        name: demo-provider-service
      cloud:
        nacos:
          # 注册中心
          discovery:
            enabled: true
            # 自己nacos地址
            server-addr: localhost:8848 
            namespace: xxxx
            
     # dubbo 配置
    dubbo:
      application.name: ${ spring.application.name}
      scan:
        base-packages: com.demo.service
      protocol:
        name: dubbo
        port: -1
      registry:
        # 挂载到 Spring Cloud 注册中心,不需要加nacos的namespace，不要使用 nacos：// 
        address: spring-cloud://${ spring.cloud.nacos.discovery.server-addr}

对应service接口上增加 @Service 注解，【org.apache.dubbo.config.annotation.Service 下的注解】

import org.apache.dubbo.config.annotation.Service;
    
    @Service(version = "1.0.0", timeout = 10000)
    public class DemoProviderServiceImpl implements DemoProviderService { 
    
    }

### 2. 消费服务方\[consumer\] ###

yaml配置文件

spring:
      application:
        name: demo-consumer-service
      cloud:
        nacos:
          # 注册中心
          discovery:
            enabled: true
            # 自己nacos地址
            server-addr: localhost:8848
            namespace: xxxx
    dubbo:
      registry:
        # 挂载到 Spring Cloud 注册中心
        address: spring-cloud://${ spring.cloud.nacos.discovery.server-addr}
        # 配置namespace
        #parameters[namespace]: ${spring.cloud.nacos.discovery.namespace}
      cloud:
        subscribed-services: demo-provider-service
      consumer:
        check: false
        loadbalance: "leastactive"

引入服务时，增加@Reference注解，\[同样是org.apache.dubbo.config.annotation.Reference下面的\]

import org.apache.dubbo.config.annotation.Reference;
    
    @RestController
    @RequestMapping(value = "test")
    public class DemoConsumerController { 
        @Reference(version = "1.0.0", timeout = 10000, check = false)
        private DemoProviderService demoProviderService;
    }

### 3. 启动服务，查看Nacos注册情况 ###

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA6JGr6Iqm6IOh_size_20_color_FFFFFF_t_70_g_se_x_16]  
查看详情如下  
![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA6JGr6Iqm6IOh_size_20_color_FFFFFF_t_70_g_se_x_16 1]  
这样就整合完成了，调用测试接口测试通过；

[Link 1]: https://nacos.io/zh-cn/docs/use-nacos-with-dubbo.html
[Nacos]: https://blog.csdn.net/HXNLYW/article/details/103403304?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522163299359516780261981287%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=163299359516780261981287&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_v2~rank_v29-5-103403304.pc_v2_rank_blog_default&utm_term=nacos&spm=1018.2226.3001.4450
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA6JGr6Iqm6IOh_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/658384bf81864d099f038f33d121add3.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA6JGr6Iqm6IOh_size_20_color_FFFFFF_t_70_g_se_x_16 1]: /images/20220828/87b993a509114bb1a99be962f2a343db.png