Dubbo + ZooKeeper

Dubbo + ZooKeeper

16 Dubbo + ZooKeeper

16.1 Dubbo下载

GigHub下载地址:https://github.com/apache/dubbo-admin/tree/master-0.2.0

下载解压,点击进入dubbo-admin文件夹,在该路径下给项目打包

mvn package -Dmaven.skip.test=true  //-Dmaven.skip.test表示不打包测试包

打包成功后,在项目的target目录下有打包成功的文件:dubbo-admin-0.0.1-SNAPSHOT.jar

16.2 ZooKeeper下载安装

ZooKeeper下载地址:https://archive.apache.org/dist/zookeeper/

下载解压,点击进入得到如下文件夹

在conf目录下添加zoo.cfg文件

直接复制一份zoo_sample.cfg,把文件名改为“zoo.cfg”即可

服务端与客户端

16.3 Dubbo+ZooKeeper测试

管理员身份启动ZooKeeper服务端

运行Dubbo,运行打包好的dubbo-admin-0.0.1-SNAPSHOT.jar文件

在dubbo-admin-0.0.1-SNAPSHOT.jar路径下,直接使用命令运行

java -jar dubbo-admin-0.0.1-SNAPSHOT.jar

在浏览器中打开:http://localhost:7001/

用户名:root
密码:root

16.4 服务注册发现实战

1、创建项目

创建一个MavenModule名为dubbo+zookeeper,删掉多余的文件,在该Module下创建两个SpringBoot项目,分别为 provider-service , sonsumer-service

2、编写provider-service项目

导入相关依赖

<dependencies>
    <!-- 导入依赖 dubbo + zookeeper-->
    <!-- dubbo-spring-boot-starter -->
    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-spring-boot-starter</artifactId>
        <version>2.7.3</version>
    </dependency>
    <!-- zkclient -->
    <dependency>
        <groupId>com.github.sgroschupf</groupId>
        <artifactId>zkclient</artifactId>
        <version>0.1</version>
    </dependency>
    <!--日志会冲突-->
    <!-- curator-framework -->
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-framework</artifactId>
        <version>5.2.0</version>
    </dependency>
    <!-- curator-recipes -->
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-recipes</artifactId>
        <version>5.2.0</version>
    </dependency>
    <!-- zookeeper -->
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>3.7.0</version>
        <!--排除这个slf4j-Log4j12-->
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

编写配置文件 application.properties

server.port=8001
# 服务应用名字
dubbo.application.name=provider-server
#注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
#哪些服务要被注册
dubbo.scan.base-packages=com.dzj.service

编写业务接口以及实现类

文件路径:com--dzj-service--TicketService.java

package com.dzj.service;

public interface TicketService {
    public String getTicket();
}

文件路径:com--dzj--service--TicketServiceImpl.java

package com.dzj.service;

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

//服务注册与发现
//@DubboService  //可以被扫描到,在项目启动就自动注册到注册中心
@Service
@Component
public class TicketServiceImpl implements TicketService {
    @Override
    public String getTicket() {
        return "常回家看看";
    }
}

打开我们的Zookeeper服务,启动运行provider-server项目,登录Dubbo

可以看到我们的项目已经注册到Dubbo注册中心

接下来我们就看看如何在consumer-server项目中如何去使用我们注册到注册中心上的方法

3、编写consumer-server

导入相关依赖

<dependencies>
    <!-- 导入依赖 dubbo + zookeeper-->
    <!-- dubbo-spring-boot-starter -->
    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-spring-boot-starter</artifactId>
        <version>2.7.3</version>
    </dependency>
    <!-- zkclient -->
    <dependency>
        <groupId>com.github.sgroschupf</groupId>
        <artifactId>zkclient</artifactId>
        <version>0.1</version>
    </dependency>
    <!--日志会冲突-->
    <!-- curator-framework -->
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-framework</artifactId>
        <version>5.2.0</version>
    </dependency>
    <!-- curator-recipes -->
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-recipes</artifactId>
        <version>5.2.0</version>
    </dependency>
    <!-- zookeeper -->
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>3.7.0</version>
        <!--排除这个slf4j-Log4j12-->
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

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

编写配置文件application.properties

server.port=8002
#消费者去哪里拿服务,需要暴露自己的名字
dubbo.application.name=consumer-server
#注册中心的地址
dubbo.registry.address=zookeeper://127.0.0.1:2181

编写接口以及实现类

文件路径:com--dzj--service--TicketService.java

package com.dzj.service;

public interface TicketService {
    public String getTicket();
}

文件路径:com--dzj-service--UserService.java

package com.dzj.service;

import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Service;

@Service  //这里是放到容器中
public class UserService {

    //想拿到provider-server提供的票,要去我们的注册中心拿到我们的服务
    @Reference //引用,Pom坐标,可以定义路径相同的接口名
    TicketService ticketService;

    public void buyTicket(){
        String ticket = ticketService.getTicket();
        System.out.println("在注册中心拿到--->"+ticket);
    }
}

在SpringBoot的测试类中调用测试

package com.dzj;

import com.dzj.service.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class ConsumerServerApplicationTests {

    @Autowired
    UserService userService;

    @Test
    void contextLoads() {
        userService.buyTicket();
    }

}

打开我们的Zookeeper服务,启动运行provider-server项目,启动运行测试类

查看结果,调用成功

本文来自云海天,作者:小公羊,转载请注明原文链接:https://www.cnblogs.com/aadzj/p/15636911.html