【教程】dubbo+zookeeper项目Demo

编程语言 2019-01-24 19:47:18 阅读次数: 0

1.环境

jdk、maven等工具已安装。下面的例子基于eclipse，绿色版的zookeeper，win10系统。
工程GIT: https://github.com/ydfind/javademo/tree/master/maven/dubbo-demo

2.运行zookeeper

运行安装目录下“./bin/zkServer.cmd”，以启动zookper。
“./conf/zoo.cfg”配置文件可以配置一些属性，如下：
dataDir=D:\ProgramData\zookeeper
dataLogDir=D:\ProgramData\zookeeper\log
在这里插入图片描述

3.创建maven工程“dubbo-server”

目录结构和最终jar包，如下：
在这里插入图片描述在这里插入图片描述

1）ServerMain.java

package com.ydfind;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
/**
 * 
 * @author Yudi
 *
 */
public class ServerMain {
	private static Logger logger = LoggerFactory.getLogger(ServerMain.class);
    public static void main(String[] args) throws IOException {
    	logger.info("--------------------start------------------------");
    	try {
 
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "dubbo.xml" });
        context.start();
        logger.info("任意按键退出");
        System.in.read();
        context.close();
        logger.info("服务器正常关闭-----------------------------");
    	}catch(Exception e) {
    		logger.info("服务器报错了-------------------");
    		e.printStackTrace();
    	}
    }
}

2）ElasticService.java

package com.ydfind.service;
/**
 * 
 * @author Yudi
 *
 */
public interface ElasticService {
    String helloDubbo(String msg);
}

3）ElasticServiceImpl.java

package com.ydfind.service.impl;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ydfind.service.ElasticService;
/**
 * 
 * @author Yudi
 *
 */
public class ElasticServiceImpl implements ElasticService {

    private static final Logger logger = LoggerFactory.getLogger(ElasticServiceImpl.class);

    public String helloDubbo(String msg) {
    	logger.info("服务器收到:" + msg);
        return "hi!" + msg;
    }
}

4）Dubbo.xml

<?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">
 
    <dubbo:application name="dubbo-server" owner="ydfind" />
    <!-- zookeeper注册中心 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <dubbo:protocol contextpath="dubbo" port="20881" />
    <dubbo:monitor protocol="registry"/>
 
    <!-- 服务具体实现 -->
    <bean id="elasticService" class="com.ydfind.service.impl.ElasticServiceImpl" />
 
    <!-- 向注册中心注册暴漏服务地址,注册服务 -->
    <dubbo:service interface="com.ydfind.service.ElasticService" ref="elasticService" protocol="dubbo" timeout="50000"/>
</beans>

5）log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "./log4j.dtd">
<log4j:configuration>
	<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="[%-d{yyyy-MM-dd HH:mm:ss.SSS}][%p][%t] %X{operationName} %X{userId} - %m%n" />
		</layout>
	</appender>

	<root>
		<level value="INFO" />
		<appender-ref ref="consoleAppender" />
	</root>
</log4j:configuration>

6）pom.xml

<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.ydfind</groupId>
	<artifactId>dubbo-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<!-- spring begin -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>4.1.6.RELEASE</version>
		</dependency>
		<!-- spring end -->
		<!-- dubbo begin -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>dubbo</artifactId>
			<version>2.5.3</version>
		</dependency>
		<!-- dubbo end -->
		<!-- 注册中心zookeeper begin -->
		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
			<version>3.3.6</version>
		</dependency>
		<!-- 注册中心zookeeper end -->
		<!-- log begin -->
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.1.1</version>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.16</version>
			<exclusions>
				<exclusion>
					<groupId>com.sun.jdmk</groupId>
					<artifactId>jmxtools</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jmx</groupId>
					<artifactId>jmxri</artifactId>
				</exclusion>
				<exclusion>
					<artifactId>jms</artifactId>
					<groupId>javax.jms</groupId>
				</exclusion>
				<exclusion>
					<artifactId>mail</artifactId>
					<groupId>javax.mail</groupId>
				</exclusion>
			</exclusions>
		</dependency>
		<!-- log end -->
		<!-- other begin -->
		<dependency>
			<groupId>org.jboss.netty</groupId>
			<artifactId>netty</artifactId>
			<version>3.2.0.Final</version>
		</dependency>
		<dependency>
			<groupId>com.101tec</groupId>
			<artifactId>zkclient</artifactId>
			<version>0.8</version>
		</dependency>
		<!-- other end -->
	</dependencies>
</project>

4.maven的jar工程“dubbo-client”

注意
需要把dubbo-server的包加入

在这里插入图片描述在这里插入图片描述

1）ClientMain.java

package com.ydfind;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.ydfind.service.ElasticService;
/**
 * 
 * @author Yudi
 *
 */
public class ClientMain {
	private static Logger logger = LoggerFactory.getLogger(ClientMain.class);

	public static void main(String[] args) {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "dubbo.xml" });
		try {
			context.start();
			ElasticService service = (ElasticService) context.getBean("elasticService");
			logger.info(service.helloDubbo("world"));
			context.close();
			logger.info("客户端正确结束了");
		} catch (Exception e) {
			logger.info("客户端 报错了");
			e.printStackTrace();
		}
	}
}

2）dubbo.xml

<?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">
 
    <dubbo:application name="consumer-of-dubbo-demo" />
 
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
 
    <!-- 向注册中心订阅服务 -->
    <dubbo:reference id="elasticService" interface="com.ydfind.service.ElasticService" />
 
</beans>

3）log4j.xml

同上

4）pom.xml

<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.ydfind</groupId>
	<artifactId>dubbo-client</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<!-- spring begin -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>4.1.6.RELEASE</version>
		</dependency>
		<!-- spring end -->

		<!-- dubbo begin -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>dubbo</artifactId>
			<version>2.5.3</version>
		</dependency>
		<!-- dubbo end -->

		<!-- 注册中心zookeeper begin -->
		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
			<version>3.3.6</version>
		</dependency>
		<!-- 注册中心zookeeper end -->

		<!-- log begin -->
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.16</version>
			<exclusions>
				<exclusion>
					<groupId>com.sun.jdmk</groupId>
					<artifactId>jmxtools</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jmx</groupId>
					<artifactId>jmxri</artifactId>
				</exclusion>
				<exclusion>
					<artifactId>jms</artifactId>
					<groupId>javax.jms</groupId>
				</exclusion>
				<exclusion>
					<artifactId>mail</artifactId>
					<groupId>javax.mail</groupId>
				</exclusion>
			</exclusions>
		</dependency>
		<!-- log end -->

		<!-- other begin -->
		<dependency>
			<groupId>com.101tec</groupId>
			<artifactId>zkclient</artifactId>
			<version>0.8</version>
		</dependency>
		<dependency>
			<groupId>com.ydfind</groupId>
			<artifactId>dubbo-server</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<!-- other end -->
	</dependencies>
</project>

5.运行测试

  • 1）运行zookeeper；
  • 2）运行dubbo-server的ServerMain.java；
  • 3）运行dubbo-client的ClientMain.java；
  • 4）将输出：
    在这里插入图片描述在这里插入图片描述
    注意：zookeeper和dubbo-server不能关闭，否则dubbo-client无法运行成功；

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