dubbo学习1：Dubbo的入门例子HelloWorld
今天看了位大神的Dubbo学习笔记终于能把HelloWorld写出来了
该例子用maven来构建，客户端和服务端之间采用组播技术进行通信，并未使用zookeeper。
服务端：
服务端代码结构：
POM.XML
<?xml version="1.0" ?> <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>cn.zto.dubbo-Service</groupId> <artifactId>dubbo-Service</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>dubbo-Service</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> </dependency> <dependency> <groupId>org.javassist</groupId> <artifactId>javassist</artifactId> <version>3.18.1-GA</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.15</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> <dependency> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> <version>2.5.6.SEC03</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.6</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.5</version> <type>pom</type> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>0.4</version> </dependency> </dependencies> </project>
applicationProvider.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="hello-world" />
<!-- 注册地址 -->
<dubbo:registry address="multicast://224.5.6.7:1234" />
<!-- Service interface Concurrent Control -->
<dubbo:service interface="cn.zto.service.IProcessData"
ref="demoService" executes="10" />
<!-- designate implementation -->
<bean id="demoService" class="cn.zto.service.impl.ProcessDataImpl" />
</beans>代码：
package cn.zto.service;
public interface IProcessData {
public String hello(String name);
}package cn.zto.service.impl;
import cn.zto.service.IProcessData;
public class ProcessDataImpl implements IProcessData {
public String hello(String name) {
System.out.println(name);
return "hello : " + name;
}
}package cn.zto.app;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main {
public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[] { "applicationProvider.xml" });
context.start();
System.out.println("按任意键退出");
System.in.read();
}
}客户端：
客户端结构：
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>cn.zto.consumer</groupId> <artifactId>dubbo-Consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <name>dubbo-Consumer</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> </dependency> <dependency> <groupId>org.javassist</groupId> <artifactId>javassist</artifactId> <version>3.18.1-GA</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.15</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> <dependency> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> <version>2.5.6.SEC03</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.6</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>com.github.adyliu</groupId> <artifactId>zkclient</artifactId> <version>2.0</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.5</version> <type>pom</type> </dependency> <dependency> <groupId>cn.zto.dubbo-Service</groupId> <artifactId>dubbo-Service</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> </dependencies> </project>
applicationConsumer.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
">
<!-- consumer application name -->
<dubbo:application name="consumer-of-helloworld-app" />
<!-- registry address, used for consumer to discover services -->
<dubbo:registry address="multicast://224.5.6.7:1234" />
<dubbo:consumer timeout="5000" />
<!-- which service to consume? -->
<dubbo:reference id="demoService" interface="cn.zto.service.IProcessData"/>
</beans>代码：
package cn.zto.consumer;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import cn.zto.service.IProcessData;
public class ConsumerThd{
public void sayHello(){
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[] { "applicationConsumer.xml" });
context.start();
IProcessData demoService = (IProcessData) context.getBean("demoService");
System.out.println(demoService.hello("world"));
}
}package cn.zto.test;
import cn.zto.consumer.ConsumerThd;
public class AppTest {
public static void main(String[] args){
ConsumerThd thd = new ConsumerThd();
thd.sayHello();
}
}运行的时候可能会遇到解析不了XML文件的错误SAXException：
在maven的本地仓库下找到maven->com->alibaba->dubbo->2.5.3->dubbo-2.5.3.jar (具体的看自己的本地仓库) 解压它获得dubbo.xsd文件
然后打开Eclipse：1. Window->Preferences->XML->XML Catalog->User Specified Entries窗口中,选择Add 按纽
2.
先运行服务端的Main方法 然后在启动 客户端的 AppTest 方法 OK
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