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Table of Contents

dubbo integration nacos case" >dubbo integration nacos case

創(chuàng)建公共接口模塊" >創(chuàng)建公共接口模塊

創(chuàng)建服務(wù)提供者模塊" >創(chuàng)建服務(wù)提供者模塊

創(chuàng)建服務(wù)消費(fèi)者模塊" >創(chuàng)建服務(wù)消費(fèi)者模塊

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SpringBoot+Dubbo+Nacos development practical tutorial

Java后端技術(shù)全棧

Aug 15, 2023 pm 04:49 PM

nacos dubbo springboot

This article will write a detailed example to talk about the actual development of dubbo nacos Spring Boot. This article will not cover too much theoretical knowledge, but will write the simplest example to illustrate how dubbo can be integrated with nacos to quickly build a development environment.

Article Directory

##Environment preparation

dubbo introduction
Nacos environment preparation
Integration of Nacos and dubbo

Project management specifications
dubbo integration nacos case

Create public interface module
Create service provider module
Create service consumer module
Service call test

Summary of this article

Environment preparation

##Introduction to dubboCalling relationship between dubbo core nodes

SpringBoot+Dubbo+Nacos development practical tutorial

Calling relationship description

The service container is responsible for starting, loading, and running the service provider.
When the service provider starts, it registers the services it provides with the registration center.
When the service consumer starts, he subscribes to the registration center for the services he needs.
The registration center returns the service provider address list to the consumer. If there is a change, the registration center will push the change data to the consumer based on the long connection.
The service consumer selects a provider to call from the provider address list based on the soft load balancing algorithm. If the call fails, it selects another provider to call.
Service consumers and providers accumulate the number of calls and call times in memory, and regularly send statistical data to the monitoring center every minute.

Nacos environment preparation

Start nacos, this article uses nacos1 .4.3 version

Open nacos control panel

Integration of Nacos and dubbo

For the convenience of everyone’s understanding, here it is written Output the corresponding producer and consumer Demo codes, as well as the registration center used.

Project management specifications

Between springboot, netflix and cloud alibaba There is a corresponding relationship between versions. The version selected for this article is as follows

There is a corresponding relationship between dubbo and cloud alibaba. The version selected for this article is as follows

In order to facilitate subsequent development using SpringCloud Alibaba, first create a parent project of pom type, which is mainly used for project technology stack version management, and create a maven project. The name is spring-cloud-alibaba-example, remove the src file and modify the pom file

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>ah.wideth</groupId>
    <artifactId>spring-cloud-alibaba-example</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.12.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <packaging>pom</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR12</spring-cloud.version>
        <com-alibaba-cloud.version>2.2.7.RELEASE</com-alibaba-cloud.version>
    </properties>

    <!--對(duì)項(xiàng)目版本進(jìn)行管理-->
    <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>${com-alibaba-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

All subsequent projects created will be placed in this directory. You only need to declare the groupId and artifactId, and it will automatically Reference the version of the parent project spring-cloud-alibaba-example. Rather than saying it is a parent project, it is better to say it is a root project: because every time you learn a new technology, a real parent project will be created, and many sub-projects will be created under the corresponding parent project

dubbo integration nacos case

The case in this article is the above nacos development example Continuing to write on the basis of. Let's start creating our project and paste my directory structure.

Module Description

public-api公共接口模塊（接口），供服務(wù)消費(fèi)者和服務(wù)提供者調(diào)用。
dubbo-provider服務(wù)提供者模塊（接口實(shí)現(xiàn)類），引入了public-api模塊
dubbo-consumer服務(wù)消費(fèi)者模塊（controller），引入了public-api模塊
消費(fèi)者和提供者通過公共接口模塊進(jìn)行rpc遠(yuǎn)程調(diào)用

父工程pom文件

<?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>
        <artifactId>spring-cloud-alibaba-example</artifactId>
        <groupId>ah.wideth</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modules>
        <module>public-api</module>
        <module>dubbo-provider</module>
        <module>dubbo-consumer</module>
    </modules>

    <artifactId>dubbo-nacos-example</artifactId>
    <name>dubbo-nacos-example</name>
    <description>duboo與nacos整合的父工程</description>
    <packaging>pom</packaging>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <dubbo.version>2.7.13</dubbo.version>
        <nacos.version>1.4.1</nacos.version>
    </properties>


    <dependencies>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <!--解決nacos-client2.0報(bào)錯(cuò)的問題-->
            <exclusions>
                <exclusion>
                    <artifactId>nacos-client</artifactId>
                    <groupId>com.alibaba.nacos</groupId>
                </exclusion>
            </exclusions>
        </dependency>


        <!--dubbo相關(guān)-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>${dubbo.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-nacos</artifactId>
            <version>${dubbo.version}</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
            <version>${nacos.version}</version>
        </dependency>

        <!-- 解決dubbo2.7.13jar包沖突問題-->
        <dependency>
            <groupId>com.alibaba.spring</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>1.0.11</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        
    </dependencies>

</project>

創(chuàng)建公共接口模塊

pom文件

<?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>
        <artifactId>dubbo-nacos-example</artifactId>
        <groupId>ah.wideth</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>public-api</artifactId>
    <name>public-api</name>
    <description>api公用接口</description>
    <packaging>jar</packaging>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>
        <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>

公共接口模塊里面只有一個(gè)接口，沒有配置文件，打jar包

package ah.wideth.api;

/**
 * 讓生產(chǎn)者和服務(wù)消
 * 費(fèi)者來使用這個(gè)接口
 */
public interface InfoService {

    String getInfo();
}

創(chuàng)建服務(wù)提供者模塊

pom文件

<?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>
        <artifactId>dubbo-nacos-example</artifactId>
        <groupId>ah.wideth</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-provider</artifactId>
    <name>dubbo-provider</name>
    <description>dubbo的服務(wù)提供者模塊</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--引入公共接口模塊-->
        <dependency>
            <groupId>${project.groupId}</groupId>
            <artifactId>public-api</artifactId>
            <version>${project.version}</version>
        </dependency>

    </dependencies>

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

</project>

application.yml配置文件

server:
  port: 8180

spring:
  application:
    name: dubbo-provider

dubbo:
  registry:
    address: nacos://127.0.0.1:8848 #注冊(cè)地址
  application:
    name: dubbo-provider #應(yīng)用名
  protocol:
    name: dubbo #dubbo協(xié)議
    port: 20880 #協(xié)議端口
  scan:
    base-packages: ah.wideth.impl #掃包范圍
  provider:
    timeout: 30000 #超時(shí)時(shí)間

接口實(shí)現(xiàn)類，該類實(shí)現(xiàn)了上面我們?cè)诠步涌谀K創(chuàng)建的接口

package ah.wideth.impl;

import ah.wideth.api.InfoService;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.stereotype.Component;


// dubbo提供的Service注解，用于聲明對(duì)外暴露服務(wù)
// 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，這里是dubbo-provider模塊！";
    }
}

服務(wù)提供者啟動(dòng)類

package ah.wideth;

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服務(wù)提供者8180啟動(dòng)了");
    }

}

創(chuàng)建服務(wù)消費(fèi)者模塊

pom文件

<?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>
        <artifactId>dubbo-nacos-example</artifactId>
        <groupId>ah.wideth</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-consumer</artifactId>
    <name>dubbo-consumer</name>
    <description>dubbo的服務(wù)消費(fèi)者模塊</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--引入公共接口模塊-->
        <dependency>
            <groupId>${project.groupId}</groupId>
            <artifactId>public-api</artifactId>
            <version>${project.version}</version>
        </dependency>

    </dependencies>

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

    </build>
</project>

application.yml配置文件

server:
  port: 8181

spring:
  application:
    name: dubbo-consumer

dubbo:
  registry:
    address: nacos://127.0.0.1:8848 #注冊(cè)地址
  application:
    name: dubbo-consumer #應(yīng)用名
  consumer:
    timeout: 30000 #超時(shí)時(shí)間

controller，調(diào)用公共接口模塊創(chuàng)建的接口

package ah.wideth.controller;

import ah.wideth.api.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，用于調(diào)用遠(yuǎn)程服務(wù)
    @DubboReference(check = false)
    private InfoService infoService;

    @GetMapping("/getInfo")
    public String getInfo(){

        return infoService.getInfo();
    }
}

服務(wù)消費(fèi)者啟動(dòng)類

package ah.wideth;

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服務(wù)消費(fèi)者8181啟動(dòng)了");
    }

}

服務(wù)調(diào)用測(cè)試

打開Nacos控制面板查看注冊(cè)中心中的服務(wù)

啟動(dòng)nacos，啟動(dòng)服務(wù)提供者和服務(wù)消費(fèi)者，調(diào)用服務(wù)消費(fèi)者的getInfo方法，服務(wù)提供者會(huì)返回結(jié)果

SpringBoot+Dubbo+Nacos development practical tutorial

本文小結(jié)

本文編寫了一個(gè)例子來對(duì)dubbo整合nacos進(jìn)行服務(wù)調(diào)用的例子，不過要注意jar包的沖突問題。

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SpringBoot+Dubbo+Nacos development practical tutorial

Article Directory

Environment preparation

##Introduction to dubboCalling relationship between dubbo core nodes

Nacos environment preparation

Integration of Nacos and dubbo

Project management specifications

dubbo integration nacos case

創(chuàng)建公共接口模塊

創(chuàng)建服務(wù)提供者模塊

創(chuàng)建服務(wù)消費(fèi)者模塊

服務(wù)調(diào)用測(cè)試

本文小結(jié)

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