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概述

Dubbo是一个分布式服务框架,用于多个系统间的RPC相互调用
Dubbo架构图

Docker安装Zookeeper

# 1、查看镜像
docker search zookeeper

# 2、拉取镜像
docker pull zookeeper

# 3、查看镜像
docker images

# 4、运行容器
# 命令限制它的内存大小,并映射端口2181到本地
docker run -d --name myZookeeper --restart always -e JVMFLAGS="-Xmx1024m" -p 2181:2181 zookeeper

# 5、查看容器是否运行
docker ps

# 6、进入容器
docker exec -it myZookeeper /bin/bash

# 7、进入到bin目录下,连接zkClinet.sh
cd bin
zkClinet.sh

项目搭建

demo整体

父模块搭建

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

    <groupId>com.buddha</groupId>
    <artifactId>springboot-dubbo-zookeeper</artifactId>
    <version>1.0.0</version>
    <modules>
        <module>provider</module>
        <module>consumer</module>
        <module>common</module>
    </modules>

    <packaging>pom</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/>
    </parent>

    <!-- 统一管理jar包版本 -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <dubbo-boot.version>3.0.4</dubbo-boot.version>
        <zkclient.version>4.2.0</zkclient.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <!-- dubbo-spring-boot依赖 -->
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-spring-boot-starter</artifactId>
                <version>${dubbo-boot.version}</version>
            </dependency>
            <!-- zookeeper客户端(curator-framework curator-recipes都含有curator-x-discovery包-->
            <dependency>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-x-discovery</artifactId>
                <version>${zkclient.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

公共common子模块

pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-dubbo-zookeeper</artifactId>
        <groupId>com.buddha</groupId>
        <version>1.0.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>common</artifactId>

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

service接口文件

package com.buddha.service;

public interface User {
    String getName(String name);
}

消费者provider子模块

pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-dubbo-zookeeper</artifactId>
        <groupId>com.buddha</groupId>
        <version>1.0.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>provider</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-x-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.buddha</groupId>
            <artifactId>common</artifactId>
            <version>1.0.0</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: 8080
dubbo:
  application:
    name: provider
  registry:
    address: zookeeper://192.168.123.199:2181
  protocol:
    name: dubbo
    port: 20880
  scan:
    base-packages: com.buddha.service

主程序main类

package com.buddha;

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

@SpringBootApplication
@EnableDubbo
public class ProviderMain8080 {
    public static void main(String[] args) {
        SpringApplication.run(ProviderMain8080.class, args);
    }
}

service实现类

package com.buddha.Service;

import com.buddha.service.User;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.stereotype.Component;

@Component
@DubboService
public class UserImpl implements User {
    @Override
    public String getName(String name) {
        return "hello " + name;
    }
}

消费者consumer子模块

pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-dubbo-zookeeper</artifactId>
        <groupId>com.buddha</groupId>
        <version>1.0.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>consumer</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-x-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.buddha</groupId>
            <artifactId>common</artifactId>
            <version>1.0.0</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: 80
dubbo:
  application:
    name: consumer
  registry:
    address: zookeeper://192.168.123.199:2181
  protocol:
    name: dubbo
    port: 20880

main主类

package com.buddha;

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

@SpringBootApplication
@EnableDubbo
public class ConsumerMain80 {
    public static void main(String[] args) {
        SpringApplication.run(ConsumerMain80.class, args);
    }
}

controller类

package com.buddha.controller;

import com.buddha.service.User;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class SiteController {
    @DubboReference
    private User user;

    @RequestMapping("/user")
    public String test(@RequestParam("name") String name) {
        return user.getName(name);
    }
}

从而实现了从一个系统到另外一个系统RPC调用的DEMO

最后

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