Dubbo使用Nacos实现注册中心

背雷管的小青年

修改于 2020-06-09 11:49:22

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修改于 2020-06-09 11:49:22

目标:Dubbo使用Nacos实现注册中心 工具：IDEA--2020.1、Nacos 学习目标:学习如何使用Nacos作为Dubbo服务的注册中心 本次学习的工程下载链接放到文本最后面

首先创建一个普通的Maven工程(构建父子模块使用)dubbo-nacos-sample,添加两个模块:nacos-sample-api(普通的maven工程)、nacos-sample-provider(springboot工程)。
在nacos中声明接口:

 package com.xmaven;

public interface IHelloService {

String sayHello(String name); }

在nacos-sample-provider中添加依赖（所有依赖如下）:

<dependencies>
    <!--直接引用api-->
    <dependency>
        <groupId>com.xmaven</groupId>
        <artifactId>nacos-sample-api</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--阿里的dubbo发现服务依赖-->
    <dependency>
        <groupId>com.alibaba.boot</groupId>
        <artifactId>nacos-discovery-spring-boot-starter</artifactId>
        <version>0.2.4</version>
        <exclusions>
            <exclusion>
                <groupId>com.alibaba.spring</groupId>
                <artifactId>spring-context-support</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-spring-boot-starter</artifactId>
        <version>2.7.5</version>
    </dependency>

</dependencies>

创建HelloServiceImpl类(nacos-sample-provider工程中)，实现我们IHelloService接口:

package com.xmaven;

import org.apache.dubbo.config.annotation.Service;

@Service 
public class HelloServiceImpl implements IHelloService {

@Override
public String sayHello(String name) {
    return "Hello World:"+name;
} }

修改application.properties配置(nacos-sample-provider工程中)。配置如下:

dubbo.application.name=spring-boot-dubbo-nacos-sample dubbo.registry.address=nacos://127.0.0.1:8848 dubbo.protocol.name=dubbo dubbo.protocol.port=20880

运行SpringBoot启动类(nacos-sample-provider工程中)，注意声明DubboComponentScan:

package com.xmaven;
importorg.apache.dubbo.config.spring.context.annotation.DubboComponentScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@DubboComponentScan
@SpringBootApplication
public class NacosSampleProviderApplication {
public static void main(String[] args) {
SpringApplication.run(NacosSampleProviderApplication.class, args);
} }

服务启动成功之后，访问Nacos控制台，进入"服务管理"————>"服务列表",如下图所示：