Dubbo入门之一：实例1
原文地址：http://blog.csdn.net/ruishenh/article/details/23180707?utm_source=tuicool
1. 概述
Dubbo是一个分布式服务框架，致力于提供高性能和透明化的RPC远程服务调用方案，以及SOA服务治理方案
主要核心部件
Remoting: 网络通信框架，实现了sync-over-async 和 request-response 消息机制.
RPC: 一个远程过程调用的抽象，支持负载均衡、容灾和集群功能
Registry: 服务目录框架用于服务的注册和服务事件发布和订阅。
Dubbo采用全Spring配置方式，透明化接入应用，对应用没有任何API侵入，只需用Spring加载Dubbo的配置即可，Dubbo基于Spring的Schema扩展进行加载。
2. 简单实例
demo文件下载：http://download.csdn.net/detail/ruishenh/7164585
首先maven项目增加dubbo的jar依赖，因为要用到zookeeper注册中心，也要依赖但是要去掉自带的log4j不然会默认的版本依赖jms-1.1.jar jmxtools-1.2.1.jar jmxri-1.2.1.jar等3个包，下载挺麻烦，当然如果个人已经在自己的仓库中有了就无所谓了。
<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.ruishenh</groupId>
<artifactId>gomeTest</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>gomeTest Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>3.1.0.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>com.alibaba.rocketmq</groupId>
<artifactId>rocketmq-all</artifactId>
<version>3.0.4-open</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.alibaba.rocketmq</groupId>
<artifactId>rocketmq-client</artifactId>
<version>3.0.4-open</version>
</dependency>
<dependency>
<groupId>com.alibaba.rocketmq</groupId>
<artifactId>rocketmq-common</artifactId>
<version>3.0.4-open</version>
</dependency>
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.2.3</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.2.3</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.2.3</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.swinglabs</groupId>
<artifactId>swingx</artifactId>
<version>1.6.1</version>
</dependency>
<!--Redis -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.4.2</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</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>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 定时器 -->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>1.7.2</version>
</dependency>
<!-- dubbo -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.0.13</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.6</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>
<!-- spring mvc 返回 json使用 -->
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.8.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.8.4</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12.4</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.26</version>
<configuration>
<connectors>
<connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
<port>8090</port>
<maxIdleTime>60000</maxIdleTime>
</connector>
</connectors>
</configuration>
</plugin>
</plugins>
<finalName>gomeTest</finalName>
</build>
</project>
Spring的依赖自己添加就好了
因为要增加zookeeper的注册管理，所以如果有可用的zookeeper就用可用的zookeeper，没有可以按照如下的安装去本地安装一个。
zk 02之 Windows安装和使用zookeeper
项目结构图
/gomeTest/src/main/resources/spring/dubbo-provider.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-app" /> <!-- zookeeper注册中心 -->
<dubbo:registry protocol="zookeeper" address="10.118.62.89:2181" />
<!-- 使用multicast广播注册中心暴露服务地址 -->
<!-- <dubbo:registry address="multicast://10.57.41.19:1234" /> -->
<dubbo:protocol name="dubbo" port="20880" />
<dubbo:service interface="com.ruishenh.dubbo.example.DemoService" ref="demoService" />
<!-- 和本地bean一样实现服务 -->
<bean id="demoService" class="com.ruishenh.dubbo.example.DemoServiceImpl" />
</beans>
/gomeTest/src/main/resources/spring/dubbo-consumer.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
">
<!-- 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="consumer-of-helloworld-app" />
<!-- zookeeper注册中心 -->
<dubbo:registry protocol="zookeeper" address="10.118.62.89:2181" />
<!-- 使用multicast广播注册中心暴露的服务地址 -->
<!--<dubbo:registry address="multicast://10.57.41.19:1234" /> -->
<!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
<dubbo:reference id="demoService" interface="com.ruishenh.dubbo.example.DemoService" />
</beans>
/gomeTest/src/main/java/com/ruishenh/dubbo/example/DemoService.java
package com.ruishenh.dubbo.example;
public interface DemoService { public void sayHello(); public String returnHello(); public MsgInfo returnMsgInfo(MsgInfo info); }
/gomeTest/src/main/java/com/ruishenh/dubbo/example/DemoServiceImpl.java
package com.ruishenh.dubbo.example;
public class DemoServiceImpl implements DemoService{
public void sayHello() {
System.out.println("hello world!");
}
public String returnHello() {
return "hello world!";
}
public MsgInfo returnMsgInfo(MsgInfo info) {
info.getMsgs().add("处理完毕");
return info;
}
}
/gomeTest/src/main/java/com/ruishenh/dubbo/example/LuncherProvider.java
package com.ruishenh.dubbo.example; import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext; public class LuncherProvider {
public static void main(String[] args) throws InterruptedException{
LuncherProvider luncher=new LuncherProvider();
luncher.start();
Thread.sleep(1000*60*10);
} void start(){
String configLocation="spring/dubbo-provider.xml";
ApplicationContext context =new ClassPathXmlApplicationContext(configLocation);
String [] names=context.getBeanDefinitionNames();
System.out.print("Beans:");
for (String string : names)
System.out.print(string+",");
System.out.println();
}
}
/gomeTest/src/main/java/com/ruishenh/dubbo/example/LuncherConsumer.java
package com.ruishenh.dubbo.example; import java.util.ArrayList;
import java.util.List; import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext; public class LuncherConsumer {
public static void main(String[] args) throws InterruptedException{
LuncherConsumer luncher=new LuncherConsumer();
luncher.start();
} void start(){
String configLocation="spring/dubbo-consumer.xml";
ApplicationContext context =new ClassPathXmlApplicationContext(configLocation);
DemoService ds=(DemoService) context.getBean("demoService");
String [] names=context.getBeanDefinitionNames();
System.out.print("Beans:");
for (String string : names) {
System.out.print(string);
System.out.print(",");
}
System.out.println(); MsgInfo info =new MsgInfo();
info.setId(1);
info.setName("ruisheh");
List<String> msgs=new ArrayList<String>();
msgs.add("I");
msgs.add("am");
msgs.add("test");
info.setMsgs(msgs); System.out.println(ds.returnMsgInfo(info).getMsgs());
}
}
/gomeTest/src/main/java/com/ruishenh/dubbo/example/MsgInfo.java
package com.ruishenh.dubbo.example; import java.io.Serializable;
import java.util.List; public class MsgInfo implements Serializable { private static final long serialVersionUID = -2814022769568306965L; int id;
String name;
List<String> msgs; public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public List<String> getMsgs() {
return msgs;
} public void setMsgs(List<String> msgs) {
this.msgs = msgs;
} }
//启动provider：运行LuncherProvider.java
- Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5829428e: startup date [Fri Mar 31 16:21:30 CST 2017]; root of context hierarchy
- Loading XML bean definitions from class path resource [spring/dubbo-provider.xml]
- using logger: com.alibaba.dubbo.common.logger.support.Log4jLoggerFactory
- Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@7cfefe3f: defining beans [hello-world-app,com.alibaba.dubbo.config.RegistryConfig,dubbo,com.ruishenh.dubbo.example.DemoService,demoService]; root of factory hierarchy
- [DUBBO] No dubbo.properties found on the class path., dubbo version: 2.0.13, current host: 127.0.0.1
- [DUBBO] Export dubbo service com.ruishenh.dubbo.example.DemoService to url dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=hello-world-app&dubbo=2.0.13&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 127.0.0.1
- [DUBBO] Register dubbo service com.ruishenh.dubbo.example.DemoService url dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=hello-world-app&dubbo=2.0.13&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision= to registry registry://10.118.62.89:2181/com.alibaba.dubbo.registry.RegistryService?application=hello-world-app®istry=zookeeper, dubbo version: 2.0.13, current host: 127.0.0.1
- [DUBBO] Start NettyServer bind /0.0.0.0:20880, export /10.118.62.89:20880, dubbo version: 2.0.13, current host: 127.0.0.1
- Client environment:zookeeper.version=3.3.6-1366786, built on 07/29/2012 06:22 GMT
- Client environment:host.name=SF0001107252A.sf.com
- Client environment:java.version=1.6.0_29
- Client environment:java.vendor=Sun Microsystems Inc.
- Client environment:java.home=C:\Java\jdk1.6.0_29\jre
- Client environment:java.class.path=D:\shiva\omcs\gomeTest\target\classes;D:\local\repo\com\alibaba\rocketmq\rocketmq-client\3.0.4-open\rocketmq-client-3.0.4-open.jar;D:\local\repo\com\alibaba\rocketmq\rocketmq-common\3.0.4-open\rocketmq-common-3.0.4-open.jar;D:\local\repo\com\alibaba\rocketmq\rocketmq-remoting\3.0.4-open\rocketmq-remoting-3.0.4-open.jar;D:\local\repo\com\alibaba\fastjson\1.1.33\fastjson-1.1.33.jar;D:\local\repo\io\netty\netty-all\4.0.9.Final\netty-all-4.0.9.Final.jar;D:\local\repo\commons-cli\commons-cli\1.2\commons-cli-1.2.jar;D:\local\repo\commons-io\commons-io\2.4\commons-io-2.4.jar;D:\local\repo\commons-httpclient\commons-httpclient\3.1\commons-httpclient-3.1.jar;D:\local\repo\commons-logging\commons-logging\1.0.4\commons-logging-1.0.4.jar;D:\local\repo\commons-codec\commons-codec\1.2\commons-codec-1.2.jar;D:\local\repo\org\apache\httpcomponents\httpclient\4.2.3\httpclient-4.2.3.jar;D:\local\repo\org\apache\httpcomponents\httpcore\4.2.3\httpcore-4.2.3.jar;D:\local\repo\org\apache\httpcomponents\httpmime\4.2.3\httpmime-4.2.3.jar;D:\local\repo\ch\qos\logback\logback-classic\1.1.1\logback-classic-1.1.1.jar;D:\local\repo\org\slf4j\slf4j-api\1.7.6\slf4j-api-1.7.6.jar;D:\local\repo\ch\qos\logback\logback-core\1.1.1\logback-core-1.1.1.jar;D:\local\repo\org\swinglabs\swingx\1.6.1\swingx-1.6.1.jar;D:\local\repo\com\jhlabs\filters\2.0.235\filters-2.0.235.jar;D:\local\repo\org\swinglabs\swing-worker\1.1\swing-worker-1.1.jar;D:\local\repo\redis\clients\jedis\2.4.2\jedis-2.4.2.jar;D:\local\repo\org\apache\commons\commons-pool2\2.0\commons-pool2-2.0.jar;D:\local\repo\org\springframework\spring-webmvc\3.1.0.RELEASE\spring-webmvc-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-asm\3.1.0.RELEASE\spring-asm-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-context-support\3.1.0.RELEASE\spring-context-support-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-web\3.1.0.RELEASE\spring-web-3.1.0.RELEASE.jar;D:\local\repo\aopalliance\aopalliance\1.0\aopalliance-1.0.jar;D:\local\repo\org\springframework\spring-test\3.1.0.RELEASE\spring-test-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-expression\3.1.0.RELEASE\spring-expression-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-tx\3.1.0.RELEASE\spring-tx-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-aop\3.1.0.RELEASE\spring-aop-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-beans\3.1.0.RELEASE\spring-beans-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-core\3.1.0.RELEASE\spring-core-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-context\3.1.0.RELEASE\spring-context-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-jdbc\3.1.0.RELEASE\spring-jdbc-3.1.0.RELEASE.jar;D:\local\repo\org\quartz-scheduler\quartz\1.7.2\quartz-1.7.2.jar;D:\local\repo\com\alibaba\dubbo\2.0.13\dubbo-2.0.13.jar;D:\local\repo\org\springframework\spring\2.5.6.SEC03\spring-2.5.6.SEC03.jar;D:\local\repo\org\javassist\javassist\3.15.0-GA\javassist-3.15.0-GA.jar;D:\local\repo\org\jboss\netty\netty\3.2.5.Final\netty-3.2.5.Final.jar;D:\local\repo\org\apache\zookeeper\zookeeper\3.3.6\zookeeper-3.3.6.jar;D:\local\repo\jline\jline\0.9.94\jline-0.9.94.jar;D:\local\repo\log4j\log4j\1.2.16\log4j-1.2.16.jar;D:\local\repo\org\codehaus\jackson\jackson-core-asl\1.8.4\jackson-core-asl-1.8.4.jar;D:\local\repo\org\codehaus\jackson\jackson-mapper-asl\1.8.4\jackson-mapper-asl-1.8.4.jar;D:\local\repo\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar;D:\local\repo\javax\servlet\jsp-api\2.0\jsp-api-2.0.jar
- Client environment:java.library.path=C:\Java\jdk1.6.0_29\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Java/jre1.8.0_31/bin/server;C:/Java/jre1.8.0_31/bin;C:/Java/jre1.8.0_31/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Java\jdk1.8.0_31\bin;C:\Java\jdk1.8.0_31\jre\bin;C:\Windows\System32;d:\Program Files (x86)\Lua\5.1\clibs;GRADLE_HOME/bin;C:\Python27;D:\soft\maven\apache-maven-3.3.9\bin;$STORM_HOME/bin;C:\Program Files\TortoiseGit\bin;C:\Program Files\Mercurial;D:\soft\gradle-2.12-all\bin;D:\soft\spark\spark-2.1.0-bin-hadoop2.7\bin;%system%\system32;C:\Program Files (x86)\Google\Chrome\Application;C:\ProgramData\Oracle\Java\javapath;C:\Java\jdk1.8.0_31\bin;C:\Java\jdk1.8.0_31\jre\bin;C:\Windows\System32;d:\Program Files (x86)\Lua\5.1\clibs;GRADLE_HOME/bin;C:\Python27;D:\soft\maven\apache-maven-3.3.9\bin;$STORM_HOME\bin;D:\soft\gradle-2.12-all\bin;D:\soft\developer tools\eclipse-jee-mars-2-win32-x86_64\eclipse;;.
- Client environment:java.io.tmpdir=C:\Users\01107252\AppData\Local\Temp\
- Client environment:java.compiler=<NA>
- Client environment:os.name=Windows 7
- Client environment:os.arch=amd64
- Client environment:os.version=6.1
- Client environment:user.name=01107252
- Client environment:user.home=d:\user\01107252
- Client environment:user.dir=D:\shiva\omcs\gomeTest
- Initiating client connection, connectString=10.118.62.89:2181 sessionTimeout=60000 watcher=com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry$1@6b12da40
- [DUBBO] Register: dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=hello-world-app&dubbo=2.0.13&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 127.0.0.1
- Opening socket connection to server /10.118.62.89:2181
- Socket connection established to SF0001107252A.sf.com/10.118.62.89:2181, initiating session
- Session establishment complete on server SF0001107252A.sf.com/10.118.62.89:2181, sessionid = 0x15b23746f340000, negotiated timeout = 40000
- [DUBBO] Recover register services [dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=hello-world-app&dubbo=2.0.13&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=], dubbo version: 2.0.13, current host: 127.0.0.1
- [DUBBO] Register: dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=hello-world-app&dubbo=2.0.13&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 127.0.0.1
Beans:hello-world-app,com.alibaba.dubbo.config.RegistryConfig,dubbo,com.ruishenh.dubbo.example.DemoService,demoService,
- [DUBBO] All clients has discontected from /10.118.62.89:20880. You can graceful shutdown now., dubbo version: 2.0.13, current host: 127.0.0.1
- [DUBBO] disconected from /10.118.62.89:57216,url:dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=hello-world-app&channel.readonly.sent=true&codec=dubbo&codec.downstream=dubbo&dubbo=2.0.13&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 127.0.0.1
//启动Consumer:运行LuncherConsumer.java
- Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@7d2a1e44: startup date [Fri Mar 31 16:21:40 CST 2017]; root of context hierarchy
- Loading XML bean definitions from class path resource [spring/dubbo-consumer.xml]
- using logger: com.alibaba.dubbo.common.logger.support.Log4jLoggerFactory
- Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@667cbde6: defining beans [consumer-of-helloworld-app,com.alibaba.dubbo.config.RegistryConfig,demoService]; root of factory hierarchy
- [DUBBO] No dubbo.properties found on the class path., dubbo version: 2.0.13, current host: 127.0.0.1
- Client environment:zookeeper.version=3.3.6-1366786, built on 07/29/2012 06:22 GMT
- Client environment:host.name=SF0001107252A.sf.com
- Client environment:java.version=1.6.0_29
- Client environment:java.vendor=Sun Microsystems Inc.
- Client environment:java.home=C:\Java\jdk1.6.0_29\jre
- Client environment:java.class.path=D:\shiva\omcs\gomeTest\target\classes;D:\local\repo\com\alibaba\rocketmq\rocketmq-client\3.0.4-open\rocketmq-client-3.0.4-open.jar;D:\local\repo\com\alibaba\rocketmq\rocketmq-common\3.0.4-open\rocketmq-common-3.0.4-open.jar;D:\local\repo\com\alibaba\rocketmq\rocketmq-remoting\3.0.4-open\rocketmq-remoting-3.0.4-open.jar;D:\local\repo\com\alibaba\fastjson\1.1.33\fastjson-1.1.33.jar;D:\local\repo\io\netty\netty-all\4.0.9.Final\netty-all-4.0.9.Final.jar;D:\local\repo\commons-cli\commons-cli\1.2\commons-cli-1.2.jar;D:\local\repo\commons-io\commons-io\2.4\commons-io-2.4.jar;D:\local\repo\commons-httpclient\commons-httpclient\3.1\commons-httpclient-3.1.jar;D:\local\repo\commons-logging\commons-logging\1.0.4\commons-logging-1.0.4.jar;D:\local\repo\commons-codec\commons-codec\1.2\commons-codec-1.2.jar;D:\local\repo\org\apache\httpcomponents\httpclient\4.2.3\httpclient-4.2.3.jar;D:\local\repo\org\apache\httpcomponents\httpcore\4.2.3\httpcore-4.2.3.jar;D:\local\repo\org\apache\httpcomponents\httpmime\4.2.3\httpmime-4.2.3.jar;D:\local\repo\ch\qos\logback\logback-classic\1.1.1\logback-classic-1.1.1.jar;D:\local\repo\org\slf4j\slf4j-api\1.7.6\slf4j-api-1.7.6.jar;D:\local\repo\ch\qos\logback\logback-core\1.1.1\logback-core-1.1.1.jar;D:\local\repo\org\swinglabs\swingx\1.6.1\swingx-1.6.1.jar;D:\local\repo\com\jhlabs\filters\2.0.235\filters-2.0.235.jar;D:\local\repo\org\swinglabs\swing-worker\1.1\swing-worker-1.1.jar;D:\local\repo\redis\clients\jedis\2.4.2\jedis-2.4.2.jar;D:\local\repo\org\apache\commons\commons-pool2\2.0\commons-pool2-2.0.jar;D:\local\repo\org\springframework\spring-webmvc\3.1.0.RELEASE\spring-webmvc-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-asm\3.1.0.RELEASE\spring-asm-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-context-support\3.1.0.RELEASE\spring-context-support-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-web\3.1.0.RELEASE\spring-web-3.1.0.RELEASE.jar;D:\local\repo\aopalliance\aopalliance\1.0\aopalliance-1.0.jar;D:\local\repo\org\springframework\spring-test\3.1.0.RELEASE\spring-test-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-expression\3.1.0.RELEASE\spring-expression-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-tx\3.1.0.RELEASE\spring-tx-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-aop\3.1.0.RELEASE\spring-aop-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-beans\3.1.0.RELEASE\spring-beans-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-core\3.1.0.RELEASE\spring-core-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-context\3.1.0.RELEASE\spring-context-3.1.0.RELEASE.jar;D:\local\repo\org\springframework\spring-jdbc\3.1.0.RELEASE\spring-jdbc-3.1.0.RELEASE.jar;D:\local\repo\org\quartz-scheduler\quartz\1.7.2\quartz-1.7.2.jar;D:\local\repo\com\alibaba\dubbo\2.0.13\dubbo-2.0.13.jar;D:\local\repo\org\springframework\spring\2.5.6.SEC03\spring-2.5.6.SEC03.jar;D:\local\repo\org\javassist\javassist\3.15.0-GA\javassist-3.15.0-GA.jar;D:\local\repo\org\jboss\netty\netty\3.2.5.Final\netty-3.2.5.Final.jar;D:\local\repo\org\apache\zookeeper\zookeeper\3.3.6\zookeeper-3.3.6.jar;D:\local\repo\jline\jline\0.9.94\jline-0.9.94.jar;D:\local\repo\log4j\log4j\1.2.16\log4j-1.2.16.jar;D:\local\repo\org\codehaus\jackson\jackson-core-asl\1.8.4\jackson-core-asl-1.8.4.jar;D:\local\repo\org\codehaus\jackson\jackson-mapper-asl\1.8.4\jackson-mapper-asl-1.8.4.jar;D:\local\repo\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar;D:\local\repo\javax\servlet\jsp-api\2.0\jsp-api-2.0.jar
- Client environment:java.library.path=C:\Java\jdk1.6.0_29\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Java/jre1.8.0_31/bin/server;C:/Java/jre1.8.0_31/bin;C:/Java/jre1.8.0_31/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Java\jdk1.8.0_31\bin;C:\Java\jdk1.8.0_31\jre\bin;C:\Windows\System32;d:\Program Files (x86)\Lua\5.1\clibs;GRADLE_HOME/bin;C:\Python27;D:\soft\maven\apache-maven-3.3.9\bin;$STORM_HOME/bin;C:\Program Files\TortoiseGit\bin;C:\Program Files\Mercurial;D:\soft\gradle-2.12-all\bin;D:\soft\spark\spark-2.1.0-bin-hadoop2.7\bin;%system%\system32;C:\Program Files (x86)\Google\Chrome\Application;C:\ProgramData\Oracle\Java\javapath;C:\Java\jdk1.8.0_31\bin;C:\Java\jdk1.8.0_31\jre\bin;C:\Windows\System32;d:\Program Files (x86)\Lua\5.1\clibs;GRADLE_HOME/bin;C:\Python27;D:\soft\maven\apache-maven-3.3.9\bin;$STORM_HOME\bin;D:\soft\gradle-2.12-all\bin;D:\soft\developer tools\eclipse-jee-mars-2-win32-x86_64\eclipse;;.
- Client environment:java.io.tmpdir=C:\Users\01107252\AppData\Local\Temp\
- Client environment:java.compiler=<NA>
- Client environment:os.name=Windows 7
- Client environment:os.arch=amd64
- Client environment:os.version=6.1
- Client environment:user.name=01107252
- Client environment:user.home=d:\user\01107252
- Client environment:user.dir=D:\shiva\omcs\gomeTest
- Initiating client connection, connectString=10.118.62.89:2181 sessionTimeout=60000 watcher=com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry$1@1d96f4b5
- Opening socket connection to server /10.118.62.89:2181
- Socket connection established to SF0001107252A.sf.com/10.118.62.89:2181, initiating session
- [DUBBO] Subscribe: subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Register: subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- Session establishment complete on server SF0001107252A.sf.com/10.118.62.89:2181, sessionid = 0x15b23746f340001, negotiated timeout = 40000
- [DUBBO] Recover register services [subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello], dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Register: subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Recover subscribe services {subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello=[com.alibaba.dubbo.registry.support.RegistryDirectory@57922f46]}, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Subscribe: subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Register: subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Start NettyClient SF0001107252A/10.118.62.89 connect to the server /10.118.62.89:20880, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Refer dubbo service com.ruishenh.dubbo.example.DemoService from url zookeeper://10.118.62.89:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 10.118.62.89
Beans:consumer-of-helloworld-app,com.alibaba.dubbo.config.RegistryConfig,demoService,
[I, am, test, 处理完毕]
- [DUBBO] Run shutdown hook now., dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Close all registries [zookeeper://10.118.62.89:2181/com.alibaba.dubbo.registry.RegistryService?application=consumer-of-helloworld-app&refer=application%3Dconsumer-of-helloworld-app%26dubbo%3D2.0.13%26id%3DdemoService%26interface%3Dcom.ruishenh.dubbo.example.DemoService%26methods%3DreturnMsgInfo%2CreturnHello%2CsayHello], dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Destroy registry: zookeeper://10.118.62.89:2181/com.alibaba.dubbo.registry.RegistryService?application=consumer-of-helloworld-app&refer=application%3Dconsumer-of-helloworld-app%26dubbo%3D2.0.13%26id%3DdemoService%26interface%3Dcom.ruishenh.dubbo.example.DemoService%26methods%3DreturnMsgInfo%2CreturnHello%2CsayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Unregister: subscribe://10.118.62.89/com.ruishenh.dubbo.example.DemoService?application=consumer-of-helloworld-app&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello, dubbo version: 2.0.13, current host: 10.118.62.89
- Session: 0x15b23746f340001 closed
- [DUBBO] Destroy reference: dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=consumer-of-helloworld-app&check=false&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 10.118.62.89
- EventThread shut down
- [DUBBO] Close netty channel [id: 0x1494cb8b, /10.118.62.89:57216 => /10.118.62.89:20880], dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Close dubbo connect: 10.118.62.89:0-->10.118.62.89:20880, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] Close dubbo connect: 10.118.62.89:0-->10.118.62.89:20880, dubbo version: 2.0.13, current host: 10.118.62.89
- [DUBBO] disconected from /10.118.62.89:20880,url:dubbo://10.118.62.89:20880/com.ruishenh.dubbo.example.DemoService?anyhost=true&application=consumer-of-helloworld-app&check=false&codec=dubbo&dubbo=2.0.13&id=demoService&interface=com.ruishenh.dubbo.example.DemoService&methods=returnMsgInfo,returnHello,sayHello&prompt=dubbo&revision=, dubbo version: 2.0.13, current host: 10.118.62.89
在上面可以看到调用结果的输出。
二、将web的http请求转到dubbo的服务上
先将app-config.xml文件中的dubbo-provider.xml打开
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--将dubbo的配置文件导入 -->
<import resource="dubbo-provider.xml" />
<!-- <import resource="dubbo-consumer.xml" /> -->
</beans>
再看下web.xml文件的配置，web.xml位置：
web.xml内容：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>gomeTest</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/app-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<servlet-name>springmvc</servlet-name>
</filter-mapping>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<error-page>
<error-code>404</error-code>
<location>/WEB-INF/views/error/404.html</location>
</error-page>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
在pom.xml中增加jetty的插件jetty-maven-plugin插件
<build>
<plugins> <plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12.4</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.26</version>
<configuration>
<connectors>
<connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
<port>8090</port>
<maxIdleTime>60000</maxIdleTime>
</connector>
</connectors>
</configuration>
</plugin>
</plugins>
<finalName>gomeTest</finalName>
</build>
调试模式运行：
启动成功后，访问http://localhost:8080/test/dubbo
三、搭建Dubbo服务管理与监控平台
1、安装Dubbo服务管理中心，需要选择一个Web容器，我们使用Tomcat服务器。首先下载Dubbo管理中心安装文件dubbo-admin-2.5.3.war，或者直接从源码构建得到该WAR文件；http://download.csdn.net/download/tangyali516/9219461
2、下载tomcat7
3、下载jdk1.7，http://download.csdn.net/download/zknxx/9662614（这里有两个包）
4、修改tomcat默认使用的jdk版本
1、windows平台
在catalina.bat文件和setclasspath.bat文件开头的空白处加上如下两句(指定JDK)：
set JAVA_HOME=D:\soft\jdk\jdk1.7.0_64.01\jdk1.7.0_64
set JRE_HOME=D:\soft\jdk\jdk1.7.0_64.01\jdk1.7.0_64\jre
其中后面为指定的jdk安装路径。
2、linux平台
在catalina.sh文件和setclasspath.sh文件开头的空白处加上如下两句(指定JDK)
export JAVA_HOME=/usr/local/java/jdk1.6.0_18
export JRE_HOME=/usr/local/java/jdk1.6.0_18/jre
启动tomcat，dubbo-admin-2.5.3.war被解压，webapps/ROOT/WEB-INF/dubbo.properties，指定我们的注册中心地址以及登录密码，内容如下所示：
dubbo.registry.address=zookeeper://127.0.0.1:2181?backup=127.0.0.1:2182,127.0.0.1:2183
dubbo.admin.root.password=root
dubbo.admin.guest.password=guest
然后访问地址http://10.10.4.130:8080/即可，根据配置文件指定的root用户密码，就可以登录Dubbo管理控制台。
我们将上面开发的服务提供方服务，部署到2个独立的节点上（192.168.14.1和10.10.4.125），然后可以通过Dubbo管理中心查看对应服务的状况，如图所示：
如图所示：
上图中可以看出，该服务有两个独立的节点可以提供，因为配置的集群模式为failover，如果某个节点的服务发生故障无法使用，则会自动透明地重试另一个节点上的服务，这就不至于出现拒绝服务的情况。如果想要查看提供方某个节点上的服务详情，可以点击对应的IP:Port链接，示例如图所示：
上图可以看到服务地址：
1 |
dubbo://10.10.4.125:20880/org.shirdrn.dubbo.api.ChatRoomOnlineUserCounterService?actives=100&anyhost=true&application=chatroom-cluster-provider&cluster=failover&dubbo=0.0.1-SNAPSHOT&executes=200&interface=org.shirdrn.dubbo.api.ChatRoomOnlineUserCounterService&loadbalance=random&methods=getMaxOnlineUserCount,queryRoomUserCount&pid=30942&queryRoomUserCount.actives=50&queryRoomUserCount.loadbalance=leastactive&queryRoomUserCount.retries=2&queryRoomUserCount.timeout=500&retries=2&revision=0.0.1-SNAPSHOT&side=provider&timeout=1000×tamp=1427793652814&version=1.0.0 |
如果我们直接暴露该地址也是可以的，不过这种直连的方式对服务消费方不是透明的，如果以后IP地址更换，也会影响调用方，所以最好是通过注册中心来隐蔽服务地址。同一个服务所部署在的多个节点上，也就对应对应着多个服务地址。另外，也可以对已经发布的服务进行控制，如修改访问控制、负载均衡相关配置内容等，可以通过上图中“消费者”查看服务消费方调用服务的情况，如图所示：
也在管理控制台可以对消费方进行管理控制。
- Dubbo监控中心
Dubbo监控中心是以Dubbo服务的形式发布到注册中心，和普通的服务时一样的。例如，我这里下载了Dubbo自带的简易监控中心文件dubbo-monitor-simple-2.5.3-assembly.tar.gz，下载地址：http://download.csdn.net/download/liweifengwf/7864009可以解压缩以后，修改配置文件~/dubbo-monitor-simple-2.5.3/conf/dubbo.properties的内容，如下所示：
[sfapp@cmos1 bin]$ vi ../conf/dubbo.properties ##
# Copyright 1999-2011 Alibaba Group.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##
dubbo.container=log4j,spring,registry,jetty
dubbo.application.name=simple-monitor
dubbo.application.owner=
#dubbo.registry.address=multicast://224.5.6.7:1234
dubbo.registry.address=zookeeper://10.118.62.89:2181
#dubbo.registry.address=redis://127.0.0.1:6379
#dubbo.registry.address=dubbo://127.0.0.1:9090
dubbo.protocol.port=7070
dubbo.jetty.port=8080
dubbo.jetty.directory=${user.home}/monitor
dubbo.charts.directory=${dubbo.jetty.directory}/charts
dubbo.statistics.directory=${user.home}/monitor/statistics
dubbo.log4j.file=logs/dubbo-monitor-simple.log
dubbo.log4j.level=WARN
然后启动简易监控中心，执行如下命令：
[sfapp@cmos1 duan]$ cd dubbo-monitor-simple-2.5.3/bin
[sfapp@cmos1 bin]$ ./start.sh
Starting the simple-monitor .......OK!
PID: 120076
STDOUT: logs/stdout.log
这里使用了Jetty Web容器，访问地址http://10.202.11.117:8080/就可以查看监控中心，Applications选项卡页面包含了服务提供方和消费方的基本信息，如图所示：
上图主要列出了所有提供方发布的服务、消费方调用、服务依赖关系等内容。
接着，查看Services选项卡页面，包含了服务提供方提供的服务列表，如图所示：
点击上图中Providers链接就能看到服务提供方的基本信息，包括服务地址等，如图所示：
点击上图中Consumers链接就能看到服务消费方的基本信息，包括服务地址等，如图所示：
由于上面是Dubbo自带的一个简易监控中心，可能所展现的内容并不能满足我们的需要，所以可以根据需要开发自己的监控中心。Dubbo也提供了监控中心的扩展接口，如果想要实现自己的监控中心，可以实现接口com.alibaba.dubbo.monitor.MonitorFactory和com.alibaba.dubbo.monitor.Monitor，其中MonitorFactory接口定义如下所示：
/**
* MonitorFactory. (SPI, Singleton, ThreadSafe)
*
* @author william.liangf
*/
@SPI("dubbo")
public interface MonitorFactory { /**
* Create monitor.
* @param url
* @return monitor
*/
@Adaptive("protocol")
Monitor getMonitor(URL url); }
Monitor接口定义如下所示：
/**
* Monitor. (SPI, Prototype, ThreadSafe)
*
* @see com.alibaba.dubbo.monitor.MonitorFactory#getMonitor(com.alibaba.dubbo.common.URL)
* @author william.liangf
*/
public interface Monitor extends Node, MonitorService { }
具体定义内容可以查看MonitorService接口，不再累述。
总结
Dubbo还提供了其他很多高级特性，如路由规则、参数回调、服务分组、服务降级等等，而且很多特性在给出内置实现的基础上，还给出了扩展的接口，我们可以给出自定义的实现，非常方便而且强大。更多可以参考Dubbo官网用户手册和开发手册。
附录：Dubbo使用Maven构建依赖配置
<properties>
<spring.version>3.2.8.RELEASE</spring.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<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>
<exclusion> <groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</exclusion>
<exclusion>
<groupId>org.jboss.netty</groupId>
<artifactId>netty</artifactId>
</exclusion>
</exclusions>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version> </dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version> </dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.2</version>
</dependency> <dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency> <dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.15.0-GA</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>hessian-lite</artifactId>
<version>3.2.1-fixed-2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.8</version>
</dependency> <dependency>
<groupId>org.jvnet.sorcerer</groupId>
<artifactId>sorcerer-javac</artifactId>
<version>0.8</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>org.jboss.netty</groupId>
<artifactId>netty</artifactId>
<version>3.2.7.Final</version>
</dependency>
</dependencies>
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