后端 | SpringBoot整合Dubbo+Nacos2

1.前言

这是一个基于SpringBoot整合Apache Dubbo+Nacos的极简教程,笔者使用到的技术及版本如下:

SpringBoot 2.4.5

Dubbo 2.7.11

Nacos 2.0.1(自行安装)

Dubbo官网:https://dubbo.apache.org/zh/

Nacos官网:https://nacos.io/zh-cn/docs/quick-start.html

2.目录结构

dubbo-client:生产者消费者共有接口

dubbo-consumer:消费者

dubbo-provider:生产者
后端 | SpringBoot整合Dubbo+Nacos2_第1张图片

3.配置文件

pom核心依赖

<dependency>
    <groupId>org.apache.dubbogroupId>
    <artifactId>dubbo-spring-boot-starterartifactId>
    <version>2.7.11version>
dependency>
<dependency>
    <groupId>com.alibaba.bootgroupId>
    <artifactId>nacos-discovery-spring-boot-starterartifactId>
    <version>0.2.7version>
    <exclusions>
       <exclusion>
           <groupId>com.alibaba.springgroupId>
           <artifactId>spring-context-supportartifactId>
       exclusion>
    exclusions>
dependency>

pom配置文件全文


<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <packaging>pompackaging>
    <modules>
        <module>dubbo-providermodule>
        <module>dubbo-clientmodule>
        <module>dubbo-consumermodule>
    modules>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.4.5version>
        <relativePath/> 
    parent>
    <groupId>xyz.hcworldgroupId>
    <artifactId>rpcscaffoldartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>rpcscaffoldname>
    <description>SpringBoot整合Apache Dubbo+Nacos的极简教程description>
    <properties>
        <java.version>1.8java.version>
    properties>
    <dependencies>
        <dependency>
            <groupId>org.apache.dubbogroupId>
            <artifactId>dubbo-spring-boot-starterartifactId>
            <version>2.7.11version>
        dependency>
        <dependency>
            <groupId>com.alibaba.bootgroupId>
            <artifactId>nacos-discovery-spring-boot-starterartifactId>
            <version>0.2.7version>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.springgroupId>
                    <artifactId>spring-context-supportartifactId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombokgroupId>
                            <artifactId>lombokartifactId>
                        exclude>
                    excludes>
                configuration>
            plugin>
        plugins>
    build>
project>

注释:需要去除spring-context-support依赖,否则运行不起来,但是去除后消费者会报错却不影响使用。

4.接口模块

定义一个消费者和生产者共同拥有的接口子模块。

package xyz.hcworld.service;/**
 * 注入接口
 * @ClassName: DemoService
 * @Author: 张红尘
 * @Date: 2021-05-24
 * @Version:1.0
 */
public interface DemoService {
    /**
     * 测试方法获取service参数
     * @param name
     * @return
     */
    String sayName(String name);
}

5.生产者模块

pom核心依赖

依赖加入接口模块。

<dependencies>
    <dependency>
         <groupId>xyz.hcworldgroupId>
         <artifactId>dubbo-clientartifactId>
         <version>0.0.1-SNAPSHOTversion>
    dependency>
dependencies>

yml配置文件

# 设置nacos的地址(配置中心)
nacos:
  discovery:
    server-addr: 192.168.2.142:8848
# 设置dubbo的参数
dubbo:
  application:
# 当前消费者的配置名
    name: dubbo-provider-demo
  registry:
    address: nacos://192.168.2.142:8848
# 协议(缺省值)
  protocol:
    name: dubbo
    port: -1

# 当前接口的名字与版本
demo:
  service:
    version: 1.0.0
    name: demoService

新版Dubbo将 @Service标注为过时,所以最新的注解应当使用 @DubboService ,如果使用 @Service容易与Spring的 @Service搞混。

package xyz.hcworld.service.impl;import org.apache.dubbo.config.annotation.DubboService;
import org.apache.dubbo.rpc.RpcContext;
import org.springframework.beans.factory.annotation.Value;
import xyz.hcworld.service.DemoService;/**
 * @ClassName: DemoServiceImpl
 * @Author: 张红尘
 * @Date: 2021-05-24
 * @Version:1.0
 */
@DubboService(interfaceClass = DemoService.class,interfaceName = "${demo.service.name}",version = "${demo.service.version}")
public class DemoServiceImpl  implements DemoService {@Value("${demo.service.name}")
    private String serviceName;@Override
    public String sayName(String name) {
        RpcContext rpcContext = RpcContext.getContext();
        return String.format("Service [name :%s , port : %d] %s(\"%s\") : Hello,%s",
                serviceName,
                rpcContext.getLocalPort(),
                rpcContext.getMethodName(),
                name,
                name);
    }
}

6.消费者模块

pom文件与同生产者模块一致,yml文件修改name其余也与生产者模块一致。

dubbo:
  application:
# 当前消费者的配置名
    name: dubbo-consumer-demo

生产者消费者的接口名与接口版本必须一致。使用@DubboReference注入远程接口。

package xyz.hcworld.controller;import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import xyz.hcworld.service.DemoService;/**
 * @ClassName: DubboController
 * @Author: 张红尘
 * @Date: 2021-05-24
 * @Version:1.0
 */
@RestController
public class DubboController {@DubboReference(interfaceClass = DemoService.class,interfaceName = "${demo.service.name}",version = "${demo.service.version}")
    private DemoService demoService;@RequestMapping("/hello")
    public String sayHello(){
        return demoService.sayName("张");
    }
}

7.结果

生产者启动结果

后端 | SpringBoot整合Dubbo+Nacos2_第2张图片

消费者启动结果后端 | SpringBoot整合Dubbo+Nacos2_第3张图片

注释:报错是因为去除了com.alibaba.spring下的spring-context-support,但并不影响使用,不去除将无法启动,这是因为Dubbo不兼容太新的SpringBoot版本导致。

浏览器请求结果

后端 | SpringBoot整合Dubbo+Nacos2_第4张图片

Nacos可视化

后端 | SpringBoot整合Dubbo+Nacos2_第5张图片
后端 | SpringBoot整合Dubbo+Nacos2_第6张图片
后端 | SpringBoot整合Dubbo+Nacos2_第7张图片

8.项目下载地址

GitHub:https://github.com/z875479694h/RpcScaffold

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