SpringBoot+Dubbo+Nacos 开发Demo_搭建dubbo+nacos项目

作者：从前慢现在也慢 | 2024-02-29 12:44:05

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搭建dubbo+nacos项目

1、是什么

Dubbo是阿里巴巴公司开源的一个高性能优秀的服务框架，使得应用可通过高性能的RPC实现服务的输出和输入功能，可以和Spring框架无缝集成。Dubbo是一款高性能、轻量级的开源Java RPC框架，它提供了三大核心能力：面向接口的远程方法调用，智能容错和负载均衡，以及服务自动注册和发现
dubbo核心节点之间的调用关系：
在这里插入图片描述
节点说明：

调用关系说明

服务容器负责启动，加载，运行服务提供者。

服务提供者在启动时，向注册中心注册自己提供的服务。

服务消费者在启动时，向注册中心订阅自己所需的服务。

注册中心返回服务提供者地址列表给消费者，如果有变更，注册中心将基于长连接推送变更数据给消费者。

服务消费者，从提供者地址列表中，基于软负载均衡算法，选一台提供者进行调用，如果调用失败，再选另一台调用。

服务消费者和提供者，在内存中累计调用次数和调用时间，定时每分钟发送一次统计数据到监控中心。

2、SpringBoot+Dubbo+Nacos 的Demo的编写

2.1 整体架构

在这里插入图片描述
父工程maven依赖

	<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.12.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>dubbo</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>8</java.version>
	</properties>
	<dependencies>
		<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>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

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2.2 公用api

在这里插入图片描述

maven依赖

<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.12.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>dubbo-api</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>dubbo-api</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>8</java.version>
	</properties>
	<dependencies>
		<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>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

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InfoService类

package com.byd.service;

public interface InfoService {
    String getInfo();
}
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2.3 服务提供模块

在这里插入图片描述
** pom依赖**

<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.12.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>dubbo-provider</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>dubbo-provider</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>8</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- nacos -->
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
			<version>2.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
			<version>2.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-dubbo</artifactId>
			<version>2.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.example</groupId>
			<artifactId>demo</artifactId>
			<version>0.0.1-SNAPSHOT</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>com.example</groupId>
			<artifactId>dubbo-api</artifactId>
			<version>0.0.1-SNAPSHOT</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>com.example</groupId>
			<artifactId>demo</artifactId>
			<version>0.0.1-SNAPSHOT</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>com.example</groupId>
			<artifactId>demo</artifactId>
			<version>0.0.1-SNAPSHOT</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.12.0</version>  <!-- 或者你可以使用最新的版本 -->
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>
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** InfoServiceImpl类**

package com.byd.service;


import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.stereotype.Component;

// dubbo提供的Service注解，用于声明对外暴露服务
// Service引入的是org.apache.dubbo.config.annotation.Service包
@Component
@DubboService
public class InfoServiceImpl implements InfoService {

    @Override
    public String getInfo() {

        return "hello，这里是dubbo-provider模块！";
    }
}
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** 启动类**

package com.byd;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@EnableDubbo
@EnableDiscoveryClient
@SpringBootApplication
public class DubboProviderApplication {

	public static void main(String[] args) {
		SpringApplication.run(DubboProviderApplication.class, args);
		System.out.println("dubbo服务提供者8101启动了");
	}


}

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application.yml配置文件

server:
  port: 8101
spring:
  application:
    name: dubbo-provider

dubbo:
  registry:
    address: nacos://127.0.0.1:8848 #注册地址
  application:
    name: dubbo-provider #应用名
  protocol:
    name: dubbo #dubbo协议
    port: 20890 #协议端口
  scan:
    base-packages: com.byd #扫包范围
  provider:
    timeout: 30000 #超时时间
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2.4 服务消费模块

在这里插入图片描述

** pom依赖**

<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.12.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>dubbo-consumer</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>dubbo-consumer</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>8</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>com.example</groupId>
			<artifactId>dubbo-api</artifactId>
			<version>0.0.1-SNAPSHOT</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<!-- nacos -->
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
			<version>2.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
			<version>2.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba.cloud</groupId>
			<artifactId>spring-cloud-starter-dubbo</artifactId>
			<version>2.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.12.0</version>  <!-- 或者你可以使用最新的版本 -->
		</dependency>
	</dependencies>


	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

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** InfoController类**

package com.byd.controller;


import com.byd.service.InfoService;
import org.apache.dubbo.config.annotation.DubboReference;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class InfoController {
 
    //dumbo提供的Reference注解，用于调用远程服务
    @DubboReference(check = false)
    private InfoService infoService;
 
    @GetMapping("/getInfo")
    public String getInfo(){
 
        return infoService.getInfo();
    }
}
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** 启动类**

package com.byd;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@EnableDubbo
@EnableDiscoveryClient
@SpringBootApplication
public class DubboConsumerApplication {

	public static void main(String[] args) {
		SpringApplication.run(DubboConsumerApplication.class, args);
		System.out.println("dubbo服务消费者8102启动了");
	}
}
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application.yml配置文件

server:
  port: 8102

spring:
  application:
    name: dubbo-consumer

dubbo:
  registry:
    address: nacos://127.0.0.1:8848 #注册地址
  application:
    name: dubbo-consumer #应用名
    protocol:
      name: dubbo #dubbo协议
      port: 20890 #协议端口
  consumer:
    timeout: 30000 #超时时间
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2.5测试

nacos页面
在这里插入图片描述
浏览器页面请求页面

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