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Dubbo与Zookeeper、SpringMVC整合和使用(入门级)

介绍就不过多的说明。可以参考http://blog.csdn.net/congcong68/article/details/41113239博客里面写的相关介绍。

后续会补充完善SpringMVC部分

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项目码云GIT地址:https://gitee.com/xshuai/dubbo/

*开发工具MyEclipse 10.7JDK1.7容器*Tomcat 8(运行dubbo)zookeeper版本zookeeper-3.4.6*dubbo*dubbo-admin-2.5.3
dubbo-admin-2.5.3下载地址:http://pan.baidu.com/s/1bozCMzP

zookeeper下载地址:http://www-eu.apache.org/dist/zookeeper/zookeeper-3.4.6/

  • Dubbo+Zookeeper 的下载安装配置启动

1.dubbo-admin-2.5.3下载完成后。放在webapps文件夹下面。先把默认的tomcat的ROOT项目备份后移除。将dubbo-admin-2.5.3.war改成ROOT.war 备用

2.zookeeper下载后解压安装即可。windows安装完成后如下图

进入到conf里面,会看到zoo_sample.cfg文件。复制一个修改为zoo.cfg,修改相关配置内容

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
#这块是设置zookeeper的端口。默认2181
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

到bin文件夹下面。启动zookeeper,windows 点击zkServer.cmd即可,启动成功如下图

3.可以启动tomcat了。这样直接访问 就能看到dubbo的页面。要不然dubbo启动会报错。第一次入门的话建议就用默认的端口配置即可。默认用户 root 密码 root

登录成功以后看到如下页面

以上就是dubbo+zookeeper的配置和启动。下面开始Java代码的编写

  • 整合Dubbo+Zookeeper+SpringMVC

1.创建myDubbo项目为主项目,结构图如下 myC P S后续才创建,刚开始是没有的。

POM.XML配置如下

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com</groupId>
  <artifactId>mydubbo</artifactId>
  注意这里。打包为POM,分布式系统的第一步
  <packaging>pom</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>mydubbo</name>
  <url>http://maven.apache.org</url>
   <properties>  
        <spring.version>3.2.4.RELEASE</spring.version>  
    </properties> 
  <dependencies>
            <dependency>  
            <groupId>com.alibaba</groupId>  
            <artifactId>dubbo</artifactId>  
            <version>2.5.3</version>  
            <exclusions>  
                <exclusion>  
                    <groupId>org.springframework</groupId>  
                    <artifactId>spring</artifactId>  
                </exclusion>  
            </exclusions>  
        </dependency>  
        <!--dubbo注册中心-->  
        <dependency>  
            <groupId>org.apache.zookeeper</groupId>  
            <artifactId>zookeeper</artifactId>  
            <version>3.4.6</version>  
        </dependency>  
        <!--zookeeper客户端-->  
        <dependency>  
            <groupId>com.github.sgroschupf</groupId>  
            <artifactId>zkclient</artifactId>  
            <version>0.1</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-core</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-context</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  </dependencies>
  <build>
    <finalName>mydubbo</finalName>
  </build>
  创建子项目后自动会加载。刚开始是没有的
  <modules>
      <module>myService</module>
      <module>myProvider</module>
      <module>myConsumer</module>
  </modules>
</project>

2.创建服务提供商子项目,MyEclipse操作如下图示意 对mydubbo项目鼠标右键new或者maven插件直接创建maven module项目,填写子项目名称。有的如果不选种Create a simple project 自定义创建会报错。选择则不会。根据实际情况来确定是否选择

3.创建3个子项目分别为 myService(服务商(接口),模块提供方) myProvider(供应者,给dubbo zookeeper注册暴露接口) myConsumer

  • myService 项目相关配置

  1. pom配置<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> <artifactId>mydubbo</artifactId> <groupId>com</groupId> <version>0.0.1-SNAPSHOT</version> </parent> <name>myService</name> <artifactId>myService</artifactId> <packaging>jar</packaging></project>
  2. 新建一个接口类package com.xiaoshuai;public interface HelloService { public String speakHello(String name);}
  3. 以上工作完成后,进行maven install
  • myProvider项目相关配置

  1. pom配置<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> <artifactId>mydubbo</artifactId> <groupId>com</groupId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>myProvider</artifactId>引用接口服务项目 子项目maven install 为jar <dependencies> <dependency> <groupId>com</groupId> <artifactId>myService</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> </dependencies></project>
  2. 实现接口服务者package com.xiaoshuai.impl;import com.xiaoshuai.HelloService;public class HelloServiceImpl implements HelloService{ public String speakHello(String name) { return "你好:"+name+"欢迎查阅小帅丶博客"; } }
  3. 将实现类接口类暴露给dubbo+zookeeper 在myProvider创建provider.xml 内容如下<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息,用于计算依赖关系 --> <dubbo:application name="hello-provider" /> <!-- 使用multicast广播注册中心暴露服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.xiaoshuai.HelloService" ref="helloService" /> <!-- 和本地bean一样实现服务 --> <bean id="helloService" class="com.xiaoshuai.impl.HelloServiceImpl" /> </beans>
  4. 需要创建一个Java类写个方法 去 加载provider.xml 注册到dubbo + zookeeperpackage com.xiaoshuai.impl;import org.springframework.context.support.ClassPathXmlApplicationContext;public class ProviderServer { public static void main(String[] args){ try { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("provider.xml"); context.start(); System.in.read(); } catch (Exception e) { e.printStackTrace(); } }}
  5. 可以运行。启动该提供者服务,编写消费者。
  6. 可以看到dubbo 提供者服务已经注册

  • myConsumer 项目相关配置

  1. pom配置<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> <artifactId>mydubbo</artifactId> <groupId>com</groupId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>myConsumer</artifactId> <dependencies> <dependency> <groupId>com</groupId> <artifactId>myService</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> </dependencies></project>
  2. 消费者进行订阅provider的服务,也就是需要去zookeeper读取加载服务,那就需要创建一个consumer.xml去加载zookeeper<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 消费方应用名,用于计算依赖关系,不是匹配条件,不要与提供方一样 --> <dubbo:application name="hello-consumer" /> <!-- 使用multicast广播注册中心暴露发现服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 生成远程服务代理,可以和本地bean一样使用demoService --> <dubbo:reference id="helloService" interface="com.xiaoshuai.HelloService" /></beans>
  3. 创建一个消费者方法,进行调用ConsumerClientpackage com.xiaoshuai;import org.springframework.context.support.ClassPathXmlApplicationContext;public class ConsumerClient { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("consumer.xml"); HelloService helloService = (HelloService) context.getBean("helloService"); String result = helloService.speakHello("xiaoshuai"); System.out.println(result); }}
  4. 运行该方法输出一下内容
  5. 接下来看dubbo中心有什么内容。
  6. 看看消费者里面显示些什么内容
  7. 详细消费者信息如图所示
  • 以上一个简单的分布式的Demo就已经完结
  • 新手入门。有问题的地方可以一起交流哦。

作者:小帅帅丶

原文地址:https://my.oschina.net/xshuai/blog/891281

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本文转载自: https://blog.csdn.net/weixin_40385726/article/details/136130097
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