dubbo入门案例搭建

spring与dubbo、Zookeeper案例

一、安装zookeeper

首先到官网下载zookeeper，版本自选点击打开链接https://zookeeper.apache.org/

1.下载完之后开始安装。这里在windows安装介绍（ps电脑性能不好，就在此演示，用法一样）：

先搭建一个单机模式的的ZooKeeper环境。

2.进入到CONF目录下，将里面的.cfg文件重命名为zoo.cfg.

# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=D:\\zookeeper-3.4.6\\data
dataLogDir=D:\\zookeeper-3.4.6\\log
#dataDir=/tmp/zookeeper

从上面代码可以看到添加了两行。在本机里。zookeeper放在D盘里，然后就添加了dataDir及dataLogDir两个变量。与此同时在zookeeper文件目录下新建data及log两个文件夹，如果不创建，后面运行脚本是地会报错。

完成后，进入bin目录，运行zkServer.cmd脚本，让后就可以在单机上将zookeeper跑起来了。

剩下来的事情就是去配置DUBBO的XML文件了，通过IP地址的设置，提供本地的服务。

二、实现案例代码

1、消费者服务代码

public class IndexController {    public static void main(String[] args) throws Exception {        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"dubbo-consumer.xml"});        context.start();        TestRegistryService testRegistryService = (TestRegistryService) context.getBean("testRegistryService"); // 获取远程服务代理        String hello = testRegistryService.hello("world"); // 执行远程方法        System.out.println(hello); // 显示调用结果        System.in.read();    }}

2、消费者服务注册中心

<?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">    <!-- 提供方应用名称信息，这个相当于起一个名字，我们dubbo管理页面比较清晰是哪个应用暴露出来的 -->    <dubbo:application name="dubbo_consumer"></dubbo:application>    <!-- 使用zookeeper注册中心暴露服务地址 -->    <dubbo:registry address="zookeeper://127.0.0.1:2181" check="false"/>    <dubbo:reference interface="com.stocsis.gavin.registry.service.TestRegistryService" id="testRegistryService"/></beans>

3.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">    <parent>        <groupId>com.stocsis.gavin</groupId>        <artifactId>microservice</artifactId>        <version>1.0</version>    </parent>    <packaging>jar</packaging>    <dependencies>        <dependency>            <groupId>com.stocsis.gavin</groupId>            <artifactId>provider</artifactId>            <version>1.0</version>        </dependency>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.11</version>            <scope>test</scope>        </dependency>    </dependencies>    <modelVersion>4.0.0</modelVersion>    <artifactId>consumer</artifactId></project>

4、提供者服务代码

（1）、接口（这应该单独为一个服务）

public interface TestRegistryService {    public String hello(String name);}

（2）实现

public class TestRegistryServiceImpl implements TestRegistryService {    public String hello(String name) {        return "hello "+name;    }}

（3）服务启动类

public class DemoProvider {   public static void main(String[] args)throws Exception {//        new Thread(new Runnable() {//            public void run() {//                try {//                    Thread.sleep(20000);//                } catch (InterruptedException e) {//                    e.printStackTrace();//                }//                ProtocolConfig.destroyAll();//            }//        }).start();        ClassPathXmlApplicationContext content = new ClassPathXmlApplicationContext(new String[]{"dubbo-provider.xml"});        content.start();        System.in.read();//        com.alibaba.dubbo.container.Main.main(args);    }}

（5）服务注册中心

<?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">    <!-- 提供方应用名称信息，这个相当于起一个名字，我们dubbo管理页面比较清晰是哪个应用暴露出来的 -->    <dubbo:application name="dubbo_provider"></dubbo:application>    <!-- 使用zookeeper注册中心暴露服务地址 -->    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>    <!-- 要暴露的服务接口 -->    <dubbo:service interface="com.stocsis.gavin.registry.service.TestRegistryService" ref="testRegistryService"/>    <bean id="testRegistryService" class="com.stocsis.gavin.registry.serviceImpl.TestRegistryServiceImpl"></bean></beans>

（6）日志

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"><log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">   <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">      <layout class="org.apache.log4j.PatternLayout">         <param name="ConversionPattern" value="[%d{dd/MM/yy hh:mm:ss:sss z}] %t %5p %c{2}: %m%n" />      </layout>   </appender>   <root>      <level value="INFO" />      <appender-ref ref="CONSOLE" />   </root></log4j:configuration>

（7）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">    <parent>        <groupId>com.stocsis.gavin</groupId>        <artifactId>microservice</artifactId>        <version>1.0</version>    </parent>    <packaging>war</packaging>    <modelVersion>4.0.0</modelVersion>    <artifactId>provider</artifactId></project>

3、项目总pom.xml配置

<?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.stocsis.gavin</groupId>    <artifactId>microservice</artifactId>    <version>1.0</version>    <packaging>pom</packaging>    <dependencies>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>3.8.1</version>            <scope>test</scope>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.0.8.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context-support</artifactId>            <version>4.0.8.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>4.0.8.RELEASE</version>        </dependency>        <!-- dubbo start-->        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>dubbo</artifactId>            <version>2.5.3</version>            <exclusions>                <exclusion>                    <artifactId>spring</artifactId>                    <groupId>org.springframework</groupId>                </exclusion>            </exclusions>        </dependency>        <dependency>            <groupId>org.apache.zookeeper</groupId>            <artifactId>zookeeper</artifactId>            <version>3.4.8</version>            <exclusions>                <exclusion>                    <groupId>log4j</groupId>                    <artifactId>log4j</artifactId>                </exclusion>            </exclusions>        </dependency>        <dependency>            <groupId>log4j</groupId>            <artifactId>log4j</artifactId>            <version>1.2.16</version>        </dependency>        <dependency>            <groupId>com.github.sgroschupf</groupId>            <artifactId>zkclient</artifactId>            <version>0.1</version>        </dependency>    </dependencies></project>