记录 Dubbo+Zookeeper 学习Demo-Toy模板网

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结合Dubbo官网学习如何完成SpringBoot+Dubbo+Zookeeper集成的学习，本次采用环境如下：

开发工具：IntelliJ IDEA Community Edition 2023.2.5 （IDEA社区版 2023.2.5）
开发环境：JDK 1.8，Windows 11
Dubbo 3.2.0-beta.4，SpringBoot 2.7.8， Zookeeper 3.8.4
辅助程序：dubbo-admin-develop

Zookeeper

Zookeeper 下载

下载地址：https://zookeeper.apache.org/releases.html#news
dubbo+zk 官网demo,dubbo,zookeeper
下载解压完毕后找到apache-zookeeper-3.8.4-bin/bin目录启动zkServer.cmd和zkcli.cmd文件，测试是否能够联通

出现以下效果说明zookeeper测试成功

可能出现的问题

启动zkServer.cmd时出现闪退
排除方法：使用文本编辑器打开zkServer.cmd文件，在末尾添加pause，解除闪退查看原因
dubbo+zk 官网demo,dubbo,zookeeper
截断之后发现原因时在conf文件夹下缺少zoo.cfg文件，那么复制zoo_sample.cfg文件修改成zoo.cfg即可，当然也可以自己编辑cfg的内容

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/tmp/zookeeper
clientPort=2181
admin.serverPort=8888

辅助程序

dubbo-admin-develop 主要是进入到dubbo-admin页面，可以查看服务提供者提供了什么服务，启动后页面如下：
dubbo+zk 官网demo,dubbo,zookeeper

下载dubbo-admin

下载地址：https://gitee.com/apache-dubbo/dubbo-admin

dubbo-admin环境：Node.js v16.3.0，npm 7.15.1，Maven 3.8.8，JDK 1.8，Zookeeper 3.8.4

项目打包

首先需要完成前端工程，打开项目，进入dubbo-admin-ui文件，进入命令行模式(cmd)，执行npm install 下载前端node_modules，完毕后再次运行命令npm run dev
dubbo+zk 官网demo,dubbo,zookeeper
完成前端工作后，回到dubbo-admin-develop文件夹，进入命令行模式(cmd)，执行mvn package -Dmaven.test.skip=true ，打包整体项目，完成之后进入到

工程打包

常见问题

常见问题见：https://blog.csdn.net/qq_43780610/article/details/136622497?spm=1001.2014.3001.5501

SpringBoot集成Dubbo

由于本人使用的社区版，所以搭建Springboot的方式是创建Maven项目，然后通过Maven配置SpringBoot依赖，觉得麻烦的可以自己去SpringBoot官网下载或者使用非社区版。
dubbo+zk 官网demo,dubbo,zookeeper

项目依赖

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

    <groupId>org.example</groupId>
    <artifactId>Dubbo-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <modules>
        <module>gmall-interface</module>
        <module>dubbo-service-consumer</module>
        <module>dubbo-service-provider</module>
    </modules>

    <properties>
        <dubbo.version>3.2.0-beta.4</dubbo.version>
        <spring-boot.version>2.7.8</spring-boot.version>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencyManagement>
        <!--   引入公共api -->
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-bom</artifactId>
                <version>${dubbo.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
                <version>3.2.0-beta.4</version>
                <type>pom</type>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <version>${spring-boot.version}</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

</project>

定义服务接口

服务接口 Dubbo 中沟通消费端和服务端的桥梁。
dubbo+zk 官网demo,dubbo,zookeeper
在gmall-interface模块的com.chen.gmall.serviceImpl创建接口类DemoService

package com.chen.gmall.service;

public interface DemoService {

    String sayHello(String name);
}

服务端实现

服务端配置依赖

dubbo+zk 官网demo,dubbo,zookeeper

pom.xml

<?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>
    <parent>
        <groupId>org.example</groupId>
        <artifactId>Dubbo-demo</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-service-provider</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>

        <!-- dubbo -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <artifactId>slf4j-reload4j</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- spring boot starter -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>gmall-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

    </dependencies>
</project>

application.properties

server.port=8080
# 在注册中心的服务名
dubbo.application.name=dubbo-springboot-service-provider

dubbo.protocol.name=dubbo
dubbo.protocol.port=-1
# 注册中心地址
dubbo.registry.address=zookeeper://${zookeeper.address:127.0.0

代码实现

在dubbo-service-provider模块的com.chen.gmall.serviceImpl实现DemoServiceImpl类，类上使用@DubboService注解，表示此类中的方法注册到注册中心中，消费者可以通过相同注解调用此类服务
注意：该实现类实现的接口是的gmall-interface的接口类，要想能够引入需要在pom.xml中引入依赖
DemoServiceImpl.java

package com.chen.gmall.serviceImpl;

import com.chen.gmall.service.DemoService;
import org.apache.dubbo.config.annotation.DubboService;

//注：在DemoServiceImpl 类中添加了 @DubboService 注解，通过这个配置可以基于 Spring Boot 去发布 Dubbo 服务
@DubboService
public class DemoServiceImpl implements DemoService {


    @Override
    public String sayHello(String name) {
        return "hello, " + name;
    }
}

启动类 ProviderApplication

package com.chen.gmall;

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

@SpringBootApplication
@EnableDubbo
public class ProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(ProviderApplication.class, args);
    }
}

消费端实现

服务端配置依赖

dubbo+zk 官网demo,dubbo,zookeeper

pom.xml

<?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>
    <parent>
        <groupId>org.example</groupId>
        <artifactId>Dubbo-demo</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-service-consumer</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>


    <dependencies>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper-curator5</artifactId>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-reload4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

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

        <dependency>
            <groupId>org.example</groupId>
            <artifactId>gmall-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

application.properties

server.port=8081
# 在注册中心的服务名
dubbo.application.name=dubbo-springboot-service-consumer
dubbo.protocol.name=dubbo
dubbo.protocol.port=-1
  # 注册中心地址
dubbo.registry.address=zookeeper://${zookeeper.address:127.0.0.1}:2181

代码实现

在dubbo-service-consumer模块的com.chen.gmall.serviceImpl实现Task 类，使用@DubboReference注入服务提供方提供的实现类，消费者可以使用这个类调用服务方该类下的所有方法

package com.chen.gmall.serviceImpl;

import com.chen.gmall.service.DemoService;
import com.chen.gmall.service.consumerTask;
import org.apache.dubbo.config.annotation.DubboReference;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.stereotype.Component;

@Component
public class Task implements consumerTask {

    @DubboReference
    DemoService demoService;

    public void Task(){
        String result = demoService.sayHello("Dubbo!");
        System.out.println("result =======> " + result);

        new Thread(() -> {
            while (true){
                try{
                    Thread.sleep(1000);

                    System.out.println("Thread Result ======> " + result);
                }catch (Exception e){
                    e.printStackTrace();
                    Thread.currentThread().interrupt();
                }
            }
        }).start();
    }
}

启动类 ConsumerApplication

package com.chen.gmall;


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

@SpringBootApplication
@EnableDubbo
public class ConsumerApplication {
    public static void main(String[] args){
        SpringApplication.run(ConsumerApplication.class, args);
    }
}

Controller
创建Controller的目的为了测试用，看看是否能够调通服务类方法

package com.chen.gmall.Controller;

import com.chen.gmall.serviceImpl.Task;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ConsumerController {

    @Autowired
    Task task;

    @GetMapping("/demoTest")
    public void demoTest() {
        System.out.println(" ==========================Starting demo=========================");
        task.Task();
    }
}

接口类 consumerTask

package com.chen.gmall.service;

import org.springframework.stereotype.Service;

@Service
public interface consumerTask {
    public void Task();
}

启动

首先，需要启动Zookeeper，在启动服务端和消费端代码，随后启动dubbo-admin，查看是否存在dubbo-service-provider的服务，如果有说明成功了，然后调用localhost:8081/demoTest，查看是否输出结果
dubbo+zk 官网demo,dubbo,zookeeper
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