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
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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
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java -jar dubbo-admin-0.0.1-SNAPSHOT.jar |
在浏览器中打开:http://localhost:7001/
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用户名:root |
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密码:root |
16.4 服务注册发现实战
1、创建项目
创建一个Maven的Module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
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<dependencies> |
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<!-- 导入依赖 dubbo + zookeeper--> |
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<!-- dubbo-spring-boot-starter --> |
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<dependency> |
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<groupId>org.apache.dubbo</groupId> |
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<artifactId>dubbo-spring-boot-starter</artifactId> |
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<version>2.7.3</version> |
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</dependency> |
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<!-- zkclient --> |
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<dependency> |
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<groupId>com.github.sgroschupf</groupId> |
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<artifactId>zkclient</artifactId> |
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<version>0.1</version> |
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</dependency> |
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<!--日志会冲突--> |
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<!-- curator-framework --> |
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<dependency> |
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<groupId>org.apache.curator</groupId> |
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<artifactId>curator-framework</artifactId> |
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<version>5.2.0</version> |
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</dependency> |
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<!-- curator-recipes --> |
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<dependency> |
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<groupId>org.apache.curator</groupId> |
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<artifactId>curator-recipes</artifactId> |
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<version>5.2.0</version> |
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</dependency> |
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<!-- zookeeper --> |
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<dependency> |
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<groupId>org.apache.zookeeper</groupId> |
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<artifactId>zookeeper</artifactId> |
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<version>3.7.0</version> |
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<!--排除这个slf4j-Log4j12--> |
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<exclusions> |
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<exclusion> |
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<groupId>org.slf4j</groupId> |
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<artifactId>slf4j-log4j12</artifactId> |
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</exclusion> |
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</exclusions> |
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</dependency> |
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<dependency> |
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<groupId>org.springframework.boot</groupId> |
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<artifactId>spring-boot-starter-web</artifactId> |
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</dependency> |
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<dependency> |
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<groupId>org.springframework.boot</groupId> |
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<artifactId>spring-boot-starter-test</artifactId> |
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<scope>test</scope> |
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</dependency> |
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</dependencies> |
编写配置文件 application.properties
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8001 = |
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# 服务应用名字 |
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provider-server = |
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#注册中心地址 |
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zookeeper://127.0.0.1:2181 = |
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#哪些服务要被注册 |
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com.dzj.service = |
编写业务接口以及实现类
文件路径:com--dzj-service--TicketService.java
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package com.dzj.service; |
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public interface TicketService { |
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public String getTicket(); |
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} |
文件路径:com--dzj--service--TicketServiceImpl.java
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package com.dzj.service; |
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import org.apache.dubbo.config.annotation.Service; |
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import org.springframework.stereotype.Component; |
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//服务注册与发现 |
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//@DubboService //可以被扫描到,在项目启动就自动注册到注册中心 |
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public class TicketServiceImpl implements TicketService { |
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public String getTicket() { |
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return "常回家看看"; |
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} |
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} |
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
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<dependencies> |
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<!-- 导入依赖 dubbo + zookeeper--> |
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<!-- dubbo-spring-boot-starter --> |
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<dependency> |
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<groupId>org.apache.dubbo</groupId> |
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<artifactId>dubbo-spring-boot-starter</artifactId> |
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<version>2.7.3</version> |
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</dependency> |
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<!-- zkclient --> |
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<dependency> |
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<groupId>com.github.sgroschupf</groupId> |
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<artifactId>zkclient</artifactId> |
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<version>0.1</version> |
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</dependency> |
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<!--日志会冲突--> |
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<!-- curator-framework --> |
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<dependency> |
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<groupId>org.apache.curator</groupId> |
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<artifactId>curator-framework</artifactId> |
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<version>5.2.0</version> |
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</dependency> |
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<!-- curator-recipes --> |
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<dependency> |
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<groupId>org.apache.curator</groupId> |
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<artifactId>curator-recipes</artifactId> |
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<version>5.2.0</version> |
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</dependency> |
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<!-- zookeeper --> |
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<dependency> |
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<groupId>org.apache.zookeeper</groupId> |
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<artifactId>zookeeper</artifactId> |
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<version>3.7.0</version> |
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<!--排除这个slf4j-Log4j12--> |
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<exclusions> |
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<exclusion> |
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<groupId>org.slf4j</groupId> |
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<artifactId>slf4j-log4j12</artifactId> |
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</exclusion> |
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</exclusions> |
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</dependency> |
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<dependency> |
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<groupId>org.springframework.boot</groupId> |
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<artifactId>spring-boot-starter-web</artifactId> |
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</dependency> |
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<dependency> |
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<groupId>org.springframework.boot</groupId> |
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<artifactId>spring-boot-starter-test</artifactId> |
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<scope>test</scope> |
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</dependency> |
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</dependencies> |
编写配置文件application.properties
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8002 = |
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#消费者去哪里拿服务,需要暴露自己的名字 |
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consumer-server = |
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#注册中心的地址 |
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zookeeper://127.0.0.1:2181 = |
编写接口以及实现类
文件路径:com--dzj--service--TicketService.java
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package com.dzj.service; |
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public interface TicketService { |
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public String getTicket(); |
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} |
文件路径:com--dzj-service--UserService.java
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package com.dzj.service; |
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import org.apache.dubbo.config.annotation.Reference; |
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import org.springframework.stereotype.Service; |
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//这里是放到容器中 |
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public class UserService { |
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//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 |
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//引用,Pom坐标,可以定义路径相同的接口名 |
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TicketService ticketService; |
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public void buyTicket(){ |
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String ticket = ticketService.getTicket(); |
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System.out.println("在注册中心拿到--->"+ticket); |
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} |
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} |
在SpringBoot的测试类中调用测试
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package com.dzj; |
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import com.dzj.service.UserService; |
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import org.junit.jupiter.api.Test; |
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import org.springframework.beans.factory.annotation.Autowired; |
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import org.springframework.boot.test.context.SpringBootTest; |
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class ConsumerServerApplicationTests { |
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UserService userService; |
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void contextLoads() { |
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userService.buyTicket(); |
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} |
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} |
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