分布式服务框架 dubbo/dubbox 入门示例(2)

dubbo是一个分布式的服务架构，可直接用于生产环境作为SOA服务框架。

官网首页：http://dubbo.io/ ，官方用户指南 http://dubbo.io/User+Guide-zh.htm上面的几张图画得不错，完全可以当做SOA架构的学习资料

淘宝将这个项目开源出来以后，得到了不少同行的支持，包括：

当当网的扩展版本dubbox ：https://github.com/dangdangdotcom/dubbox

京东的扩展版本jd-hydra: http://www.oschina.net/p/jd-hydra

不过，略有遗憾的是，据说在淘宝内部，dubbo由于跟淘宝另一个类似的框架HSF（非开源）有竞争关系，导致dubbo团队已经解散（参见http://www.oschina.net/news/55059/druid-1-0-9 中的评论），反到是当当网的扩展版本仍在持续发展，墙内开花墙外香。

不管如何，能在阿里、当当、京东这些大型网站正式使用的框架，总不至于差到哪里去。

本文下面的示例均基于当当的dubbox版本，由于dubbox并没向maven提交编译后的jar包，所以只能从github clone代码到本地编译得到jar包。

Dubbo建议使用Zookeeper作为服务的注册中心。

1.   Zookeeper的作用：

        zookeeper用来注册服务和进行负载均衡，哪一个服务由哪一个机器来提供必需让调用者知道，简单来说就是ip地址和服务名称的对应关系。当然也可以通过硬编码的方式把这种对应关系在调用方业务代码中实现，但是如果提供服务的机器挂掉调用者无法知晓，如果不更改代码会继续请求挂掉的机器提供服务。zookeeper通过心跳机制可以检测挂掉的机器并将挂掉机器的ip和服务对应关系从列表中删除。至于支持高并发，简单来说就是横向扩展，在不更改代码的情况通过添加机器来提高运算能力。通过添加新的机器向zookeeper注册服务，服务的提供者多了能服务的客户就多了。

2.  dubbo：

      是管理中间层的工具，在业务层到数据仓库间有非常多服务的接入和服务提供者需要调度，dubbo提供一个框架解决这个问题。

      注意这里的dubbo只是一个框架，至于你架子上放什么是完全取决于你的，就像一个汽车骨架，你需要配你的轮子引擎。这个框架中要完成调度必须要有一个分布式的注册中心，储存所有服务的元数据，你可以用zk，也可以用别的，只是大家都用zk。

3. zookeeper和dubbo的关系：
      Dubbo的将注册中心进行抽象，是得它可以外接不同的存储媒介给注册中心提供服务，有ZooKeeper，Memcached，Redis等。
      引入了ZooKeeper作为存储媒介，也就把ZooKeeper的特性引进来。首先是负载均衡，单注册中心的承载能力是有限的，在流量达到一定程度的时候就需要分流，负载均衡就是为了分流而存在的，一个ZooKeeper群配合相应的Web应用就可以很容易达到负载均衡；资源同步，单单有负载均衡还不够，节点之间的数据和资源需要同步，ZooKeeper集群就天然具备有这样的功能；命名服务，将树状结构用于维护全局的服务地址列表，服务提供者在启动的时候，向ZK上的指定节点/dubbo/${serviceName}/providers目录下写入自己的URL地址，这个操作就完成了服务的发布。其他特性还有Mast选举，分布式锁等。

 

编译及测试步骤：(以下步骤全在windows环境中完成)

1. 本机先安装github on Windows的客户端，将在path路径中，把git.exe加进去

2. 命令行下 git clone https://github.com/dangdangdotcom/dubbox 把代码拉到本地

3. mvn install -Dmaven.test.skip=true 跳过测试编译

4. 在本机安装一个zookeeper，参考zoo.cfg如下：

tickTime=2000
initLimit=10
syncLimit=5
dataDir=D:/java/zookeeper-3.4.6/data
dataLogDir=D:/java/zookeeper-3.4.6/log
clientPort=2181
server.1=localhost:2287:3387

然后输入 bin/zkServer.cmd 启用zookeeper

5. intellij Idea中导入源码

6. 运行 \dubbox\dubbo-demo\dubbo-demo-provider\src\test\java\com\alibaba\dubbo\demo\provider\DemoProvider.java 

把服务提供方跑起来，成功后，可以在ZK里，用 ls / 看下，会发现zk里多出了一个dubbo的节点，所有服务全注册在这里了

7. 运行\dubbox\dubbo-demo\dubbo-demo-consumer\src\test\java\com\alibaba\dubbo\demo\consumer\DemoConsumer.java

服务消费方调用测试，可以看console里的输出

8. 运行\dubbox\dubbo-demo\dubbo-demo-consumer\src\test\java\com\alibaba\dubbo\demo\consumer\RestClient.java

跑一下rest调用

9. 浏览器访问 http://localhost:8888/services/users/100.xml 或 http://localhost:8888/services/users/100.json

 

dubbox官方的示例，虽然已经很简单了，但是对于初次接触的人来讲，仍然略显复杂，下面的代码在其基础上简化了一下：

一、先定义服务接口及传输对象DTO

项目结构如下

代码：

User.java

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package yjmyzz.dubbo.demo.api;

import org.codehaus.jackson.annotate.JsonProperty;

import javax.validation.constraints.Min;

import javax.validation.constraints.NotNull;

import javax.validation.constraints.Size;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

import java.io.Serializable;

 

@XmlRootElement

@XmlAccessorType(XmlAccessType.FIELD)

public class User implements Serializable {

 

    @NotNull

    @Min(1L)

    private Long id;

 

    @JsonProperty("username")

    @XmlElement(name = "username")

    @NotNull

    @Size(min = 6, max = 50)

    private String name;

 

    public User() {

    }

 

    public User(Long id, String name) {

        this.id = id;

        this.name = name;

    }

 

    public Long getId() {

        return id;

    }

 

    public void setId(Long id) {

        this.id = id;

    }

 

    public String getName() {

        return name;

    }

 

    public void setName(String name) {

        this.name = name;

    }

 

    @Override

    public String toString() {

        return "User (" +

                "id=" + id +

                ", name='" + name + '\'' +

                ')';

    }

}

UserService.java

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package yjmyzz.dubbo.demo.api;

 

public interface UserService {

    User getUser(Long id);

}

UserRestService.java

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package yjmyzz.dubbo.demo.api;

 

import javax.validation.constraints.Min;

 

public interface UserRestService {

    User getUser(@Min(value = 1L, message = "User ID must be greater than 1") Long id);

}

pom.xml

<?xml version="1.0" encoding="UTF-8"?> 2 <project xmlns="http://maven.apache.org/POM/4.0.0" 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 5  6     <modelVersion>4.0.0</modelVersion> 7  8     <groupId>com.cnblogs.yjmyzz</groupId> 9     <artifactId>dubbo-hello-api</artifactId>10     <version>0.1</version>11 12     <dependencies>13 14         <dependency>15             <groupId>com.alibaba</groupId>16             <artifactId>dubbo</artifactId>17             <version>2.8.4</version>18         </dependency>19 20         <dependency>21             <groupId>javax.validation</groupId>22             <artifactId>validation-api</artifactId>23             <version>1.0.0.GA</version>24         </dependency>25 26         <dependency>27             <groupId>javax.annotation</groupId>28             <artifactId>javax.annotation-api</artifactId>29             <version>1.2</version>30         </dependency>31 32         <dependency>33             <groupId>org.codehaus.jackson</groupId>34             <artifactId>jackson-mapper-asl</artifactId>35             <version>1.9.12</version>36         </dependency>37 38     </dependencies>39 </project>

 

二、定义服务生产者（即：服务接口的实现方）

UserServiceImpl.java

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package yjmyzz.dubbo.demo.provider;

 

import yjmyzz.dubbo.demo.api.User;

import yjmyzz.dubbo.demo.api.UserService;

 

public class UserServiceImpl implements UserService {

 

    public User getUser(Long id) {

        return new User(id, "username" + id);

    }

}

UserRestServiceImpl.java

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package yjmyzz.dubbo.demo.provider;

 

import com.alibaba.dubbo.rpc.RpcContext;

import com.alibaba.dubbo.rpc.protocol.rest.support.ContentType;

import yjmyzz.dubbo.demo.api.User;

import yjmyzz.dubbo.demo.api.UserRestService;

import yjmyzz.dubbo.demo.api.UserService;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.ws.rs.*;

import javax.ws.rs.core.MediaType;

 

@Path("users")

@Consumes({MediaType.APPLICATION_JSON, MediaType.TEXT_XML})

@Produces({ContentType.APPLICATION_JSON_UTF_8, ContentType.TEXT_XML_UTF_8})

public class UserRestServiceImpl implements UserRestService {

 

    private UserService userService;

 

    public void setUserService(UserService userService) {

        this.userService = userService;

    }

 

    @GET

    @Path("{id : \\d+}")

    public User getUser(@PathParam("id") Long id) {

        if (RpcContext.getContext().getRequest(HttpServletRequest.class) != null) {

            System.out.println("Client IP address from RpcContext: " + RpcContext.getContext().getRequest(HttpServletRequest.class).getRemoteAddr());

        }

        if (RpcContext.getContext().getResponse(HttpServletResponse.class) != null) {

            System.out.println("Response object from RpcContext: " + RpcContext.getContext().getResponse(HttpServletResponse.class));

        }

        return userService.getUser(id);

    }

}

DemoProvider.java

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package yjmyzz.dubbo.demo.provider;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

 

public class DemoProvider {

    public static void main(String[] args) throws IOException {

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:META-INF/spring/*.xml");

        context.start();

        System.out.println("服务已经启动...");

        System.in.read();

    }

}

配置文件：resources\META-INF\spring\dubbo-demo-provider.xml

<?xml version="1.0" encoding="UTF-8"?> 2  3 <beans xmlns="http://www.springframework.org/schema/beans" 4        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 5        xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" 6        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 7     http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> 8  9     <dubbo:application name="demo-provider" owner="programmer" organization="dubbox"/>10 11     <dubbo:registry address="zookeeper://127.0.0.1:2181"/>12 13     <dubbo:protocol name="dubbo" serialization="kryo" optimizer="yjmyzz.dubbo.demo.api.SerializationOptimizerImpl"/>14 15     <!-- use tomcat server -->16     <dubbo:protocol name="rest" port="8888" threads="500" contextpath="services" server="tomcat" accepts="500"17                     extension="com.alibaba.dubbo.rpc.protocol.rest.support.LoggingFilter"/>18 19 20     <dubbo:service interface="yjmyzz.dubbo.demo.api.UserService" ref="userService" protocol="dubbo" />21 22     <dubbo:service interface="yjmyzz.dubbo.demo.api.UserRestService" ref="userRestService" protocol="rest"  validation="true"/>23 24     <bean id="userService" class="yjmyzz.dubbo.demo.provider.UserServiceImpl"/>25 26     <bean id="userRestService" class="yjmyzz.dubbo.demo.provider.UserRestServiceImpl">27         <property name="userService" ref="userService"/>28     </bean>29 30 31 </beans>

pom.xml

<?xml version="1.0" encoding="UTF-8"?>  2 <project xmlns="http://maven.apache.org/POM/4.0.0"  3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  5   6     <modelVersion>4.0.0</modelVersion>  7   8     <groupId>com.cnblogs.yjmyzz</groupId>  9     <artifactId>dubbo-hello-provider</artifactId> 10     <version>0.1</version> 11  12     <dependencies> 13  14         <!--公用的服务接口--> 15         <dependency> 16             <groupId>com.cnblogs.yjmyzz</groupId> 17             <artifactId>dubbo-hello-api</artifactId> 18             <version>0.1</version> 19         </dependency> 20  21         <dependency> 22             <groupId>com.alibaba</groupId> 23             <artifactId>dubbo</artifactId> 24             <version>2.8.4</version> 25         </dependency> 26  27         <dependency> 28             <groupId>org.javassist</groupId> 29             <artifactId>javassist</artifactId> 30             <version>3.15.0-GA</version> 31         </dependency> 32  33         <dependency> 34             <groupId>org.apache.mina</groupId> 35             <artifactId>mina-core</artifactId> 36             <version>1.1.7</version> 37         </dependency> 38  39         <dependency> 40             <groupId>org.glassfish.grizzly</groupId> 41             <artifactId>grizzly-core</artifactId> 42             <version>2.1.4</version> 43         </dependency> 44  45         <dependency> 46             <groupId>org.apache.httpcomponents</groupId> 47             <artifactId>httpclient</artifactId> 48             <version>4.2.1</version> 49         </dependency> 50  51         <dependency> 52             <groupId>com.alibaba</groupId> 53             <artifactId>fastjson</artifactId> 54             <version>1.1.39</version> 55         </dependency> 56  57         <dependency> 58             <groupId>com.thoughtworks.xstream</groupId> 59             <artifactId>xstream</artifactId> 60             <version>1.4.1</version> 61         </dependency> 62  63         <dependency> 64             <groupId>org.apache.bsf</groupId> 65             <artifactId>bsf-api</artifactId> 66             <version>3.1</version> 67         </dependency> 68  69         <dependency> 70             <groupId>org.apache.zookeeper</groupId> 71             <artifactId>zookeeper</artifactId> 72             <version>3.4.6</version> 73         </dependency> 74  75         <dependency> 76             <groupId>com.github.sgroschupf</groupId> 77             <artifactId>zkclient</artifactId> 78             <version>0.1</version> 79         </dependency> 80  81         <dependency> 82             <groupId>org.apache.curator</groupId> 83             <artifactId>curator-framework</artifactId> 84             <version>2.5.0</version> 85         </dependency> 86  87         <dependency> 88             <groupId>com.googlecode.xmemcached</groupId> 89             <artifactId>xmemcached</artifactId> 90             <version>1.3.6</version> 91         </dependency> 92  93         <dependency> 94             <groupId>org.apache.cxf</groupId> 95             <artifactId>cxf-rt-frontend-simple</artifactId> 96             <version>2.6.1</version> 97         </dependency> 98  99         <dependency>100             <groupId>org.apache.cxf</groupId>101             <artifactId>cxf-rt-transports-http</artifactId>102             <version>2.6.1</version>103         </dependency>104 105         <dependency>106             <groupId>org.apache.thrift</groupId>107             <artifactId>libthrift</artifactId>108             <version>0.8.0</version>109         </dependency>110 111         <dependency>112             <groupId>com.caucho</groupId>113             <artifactId>hessian</artifactId>114             <version>4.0.7</version>115         </dependency>116 117         <dependency>118             <groupId>javax.servlet</groupId>119             <artifactId>javax.servlet-api</artifactId>120             <version>3.1.0</version>121         </dependency>122 123         <dependency>124             <groupId>org.mortbay.jetty</groupId>125             <artifactId>jetty</artifactId>126             <version>6.1.26</version>127             <exclusions>128                 <exclusion>129                     <groupId>org.mortbay.jetty</groupId>130                     <artifactId>servlet-api</artifactId>131                 </exclusion>132             </exclusions>133         </dependency>134 135         <dependency>136             <groupId>log4j</groupId>137             <artifactId>log4j</artifactId>138             <version>1.2.16</version>139         </dependency>140 141         <dependency>142             <groupId>org.slf4j</groupId>143             <artifactId>slf4j-api</artifactId>144             <version>1.6.2</version>145         </dependency>146 147         <dependency>148             <groupId>redis.clients</groupId>149             <artifactId>jedis</artifactId>150             <version>2.1.0</version>151         </dependency>152 153         <dependency>154             <groupId>javax.validation</groupId>155             <artifactId>validation-api</artifactId>156             <version>1.0.0.GA</version>157         </dependency>158 159         <dependency>160             <groupId>org.hibernate</groupId>161             <artifactId>hibernate-validator</artifactId>162             <version>4.2.0.Final</version>163         </dependency>164 165         <dependency>166             <groupId>javax.cache</groupId>167             <artifactId>cache-api</artifactId>168             <version>0.4</version>169         </dependency>170 171         <dependency>172             <groupId>org.jboss.resteasy</groupId>173             <artifactId>resteasy-jaxrs</artifactId>174             <version>3.0.7.Final</version>175         </dependency>176 177         <dependency>178             <groupId>org.jboss.resteasy</groupId>179             <artifactId>resteasy-client</artifactId>180             <version>3.0.7.Final</version>181         </dependency>182 183         <dependency>184             <groupId>org.jboss.resteasy</groupId>185             <artifactId>resteasy-netty</artifactId>186             <version>3.0.7.Final</version>187         </dependency>188 189         <dependency>190             <groupId>org.jboss.resteasy</groupId>191             <artifactId>resteasy-jdk-http</artifactId>192             <version>3.0.7.Final</version>193         </dependency>194 195         <dependency>196             <groupId>org.jboss.resteasy</groupId>197             <artifactId>resteasy-jackson-provider</artifactId>198             <version>3.0.7.Final</version>199         </dependency>200 201         <dependency>202             <groupId>org.jboss.resteasy</groupId>203             <artifactId>resteasy-jaxb-provider</artifactId>204             <version>3.0.7.Final</version>205         </dependency>206 207         <dependency>208             <groupId>org.apache.tomcat.embed</groupId>209             <artifactId>tomcat-embed-core</artifactId>210             <version>8.0.11</version>211         </dependency>212 213         <dependency>214             <groupId>org.apache.tomcat.embed</groupId>215             <artifactId>tomcat-embed-logging-juli</artifactId>216             <version>8.0.11</version>217         </dependency>218 219         <dependency>220             <groupId>com.esotericsoftware.kryo</groupId>221             <artifactId>kryo</artifactId>222             <version>2.24.0</version>223         </dependency>224 225         <dependency>226             <groupId>de.javakaffee</groupId>227             <artifactId>kryo-serializers</artifactId>228             <version>0.26</version>229         </dependency>230 231         <dependency>232             <groupId>de.ruedigermoeller</groupId>233             <artifactId>fst</artifactId>234             <version>1.55</version>235         </dependency>236 237     </dependencies>238 239 240 </project>

测试时，运行DemoProvider中的main方法即可启动服务，所有服务注册在ZooKeeper，层次结构类似下面这样：

/dubbo  /dubbo/yjmyzz.dubbo.demo.api.UserRestService    /dubbo/yjmyzz.dubbo.demo.api.UserRestService/providers    /dubbo/yjmyzz.dubbo.demo.api.UserRestService/configurators  /dubbo/yjmyzz.dubbo.demo.api.UserService    /dubbo/yjmyzz.dubbo.demo.api.UserService/providers    /dubbo/yjmyzz.dubbo.demo.api.UserService/configurators

 

三、服务消费方

 

DemoConsumer.java

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package yjmyzz.dubbo.demo.consumer;

 

import org.springframework.context.support.ClassPathXmlApplicationContext;

import yjmyzz.dubbo.demo.api.UserService;

import javax.ws.rs.client.Client;

import javax.ws.rs.client.ClientBuilder;

import javax.ws.rs.client.WebTarget;

import javax.ws.rs.core.Response;

 

public class DemoConsumer {

 

    public static void main(String[] args) {

        final String port = "8888";

 

        //测试Rest服务

        getUser("http://localhost:" + port + "/services/users/1.json");

        getUser("http://localhost:" + port + "/services/users/1.xml");

 

        //测试常规服务

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:META-INF/spring/*.xml");

        context.start();

        UserService userService = context.getBean(UserService.class);

        System.out.println(userService.getUser(1L));

    }

 

 

    private static void getUser(String url) {

        System.out.println("Getting user via " + url);

        Client client = ClientBuilder.newClient();

        WebTarget target = client.target(url);

        Response response = target.request().get();

        try {

            if (response.getStatus() != 200) {

                throw new RuntimeException("Failed with HTTP error code : " + response.getStatus());

            }

            System.out.println("Successfully got result: " + response.readEntity(String.class));

        } finally {

            response.close();

            client.close();

        }

    }

}

配置文件：resources\META-INF\spring\dubbo-hello-consumer.xml

<?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4        xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" 5        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 6     http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> 7  8     <dubbo:application name="demo-consumer" owner="programmer" organization="dubbox"/> 9 10     <dubbo:registry address="zookeeper://127.0.0.1:2181"/>11 12     <dubbo:reference id="userRestService" interface="yjmyzz.dubbo.demo.api.UserRestService"/>13 14     <dubbo:reference id="userService" interface="yjmyzz.dubbo.demo.api.UserService"/>15 16 </beans>

pom.xml

<?xml version="1.0" encoding="UTF-8"?>  2 <project xmlns="http://maven.apache.org/POM/4.0.0"  3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  5   6     <modelVersion>4.0.0</modelVersion>  7   8     <groupId>com.cnblogs.yjmyzz</groupId>  9     <artifactId>dubbo-hello-consumer</artifactId> 10     <version>0.1</version> 11  12  13     <dependencies> 14         <!--公用的服务接口--> 15         <dependency> 16             <groupId>com.cnblogs.yjmyzz</groupId> 17             <artifactId>dubbo-hello-api</artifactId> 18             <version>0.1</version> 19         </dependency> 20  21  22         <dependency> 23             <groupId>com.alibaba</groupId> 24             <artifactId>dubbo</artifactId> 25             <version>2.8.4</version> 26         </dependency> 27  28         <dependency> 29             <groupId>org.javassist</groupId> 30             <artifactId>javassist</artifactId> 31             <version>3.15.0-GA</version> 32         </dependency> 33  34         <dependency> 35             <groupId>org.apache.mina</groupId> 36             <artifactId>mina-core</artifactId> 37             <version>1.1.7</version> 38         </dependency> 39  40         <dependency> 41             <groupId>org.glassfish.grizzly</groupId> 42             <artifactId>grizzly-core</artifactId> 43             <version>2.1.4</version> 44         </dependency> 45  46         <dependency> 47             <groupId>org.apache.httpcomponents</groupId> 48             <artifactId>httpclient</artifactId> 49             <version>4.2.1</version> 50         </dependency> 51  52         <dependency> 53             <groupId>com.alibaba</groupId> 54             <artifactId>fastjson</artifactId> 55             <version>1.1.39</version> 56         </dependency> 57  58         <dependency> 59             <groupId>com.thoughtworks.xstream</groupId> 60             <artifactId>xstream</artifactId> 61             <version>1.4.1</version> 62         </dependency> 63  64         <dependency> 65             <groupId>org.apache.bsf</groupId> 66             <artifactId>bsf-api</artifactId> 67             <version>3.1</version> 68         </dependency> 69  70         <dependency> 71             <groupId>org.apache.zookeeper</groupId> 72             <artifactId>zookeeper</artifactId> 73             <version>3.4.6</version> 74         </dependency> 75  76         <dependency> 77             <groupId>com.github.sgroschupf</groupId> 78             <artifactId>zkclient</artifactId> 79             <version>0.1</version> 80         </dependency> 81  82         <dependency> 83             <groupId>org.apache.curator</groupId> 84             <artifactId>curator-framework</artifactId> 85             <version>2.5.0</version> 86         </dependency> 87  88         <dependency> 89             <groupId>com.googlecode.xmemcached</groupId> 90             <artifactId>xmemcached</artifactId> 91             <version>1.3.6</version> 92         </dependency> 93  94         <dependency> 95             <groupId>org.apache.cxf</groupId> 96             <artifactId>cxf-rt-frontend-simple</artifactId> 97             <version>2.6.1</version> 98         </dependency> 99 100         <dependency>101             <groupId>org.apache.cxf</groupId>102             <artifactId>cxf-rt-transports-http</artifactId>103             <version>2.6.1</version>104         </dependency>105 106         <dependency>107             <groupId>org.apache.thrift</groupId>108             <artifactId>libthrift</artifactId>109             <version>0.8.0</version>110         </dependency>111 112         <dependency>113             <groupId>com.caucho</groupId>114             <artifactId>hessian</artifactId>115             <version>4.0.7</version>116         </dependency>117 118         <dependency>119             <groupId>javax.servlet</groupId>120             <artifactId>javax.servlet-api</artifactId>121             <version>3.1.0</version>122         </dependency>123 124         <dependency>125             <groupId>org.mortbay.jetty</groupId>126             <artifactId>jetty</artifactId>127             <version>6.1.26</version>128             <exclusions>129                 <exclusion>130                     <groupId>org.mortbay.jetty</groupId>131                     <artifactId>servlet-api</artifactId>132                 </exclusion>133             </exclusions>134         </dependency>135 136         <dependency>137             <groupId>log4j</groupId>138             <artifactId>log4j</artifactId>139             <version>1.2.16</version>140         </dependency>141 142         <dependency>143             <groupId>org.slf4j</groupId>144             <artifactId>slf4j-api</artifactId>145             <version>1.6.2</version>146         </dependency>147 148         <dependency>149             <groupId>redis.clients</groupId>150             <artifactId>jedis</artifactId>151             <version>2.1.0</version>152         </dependency>153 154         <dependency>155             <groupId>javax.validation</groupId>156             <artifactId>validation-api</artifactId>157             <version>1.0.0.GA</version>158         </dependency>159 160         <dependency>161             <groupId>org.hibernate</groupId>162             <artifactId>hibernate-validator</artifactId>163             <version>4.2.0.Final</version>164         </dependency>165 166         <dependency>167             <groupId>javax.cache</groupId>168             <artifactId>cache-api</artifactId>169             <version>0.4</version>170         </dependency>171 172         <dependency>173             <groupId>org.jboss.resteasy</groupId>174             <artifactId>resteasy-jaxrs</artifactId>175             <version>3.0.7.Final</version>176         </dependency>177 178         <dependency>179             <groupId>org.jboss.resteasy</groupId>180             <artifactId>resteasy-client</artifactId>181             <version>3.0.7.Final</version>182         </dependency>183 184         <dependency>185             <groupId>org.jboss.resteasy</groupId>186             <artifactId>resteasy-netty</artifactId>187             <version>3.0.7.Final</version>188         </dependency>189 190         <dependency>191             <groupId>org.jboss.resteasy</groupId>192             <artifactId>resteasy-jdk-http</artifactId>193             <version>3.0.7.Final</version>194         </dependency>195 196         <dependency>197             <groupId>org.jboss.resteasy</groupId>198             <artifactId>resteasy-jackson-provider</artifactId>199             <version>3.0.7.Final</version>200         </dependency>201 202         <dependency>203             <groupId>org.jboss.resteasy</groupId>204             <artifactId>resteasy-jaxb-provider</artifactId>205             <version>3.0.7.Final</version>206         </dependency>207 208         <dependency>209             <groupId>org.apache.tomcat.embed</groupId>210             <artifactId>tomcat-embed-core</artifactId>211             <version>8.0.11</version>212         </dependency>213 214         <dependency>215             <groupId>org.apache.tomcat.embed</groupId>216             <artifactId>tomcat-embed-logging-juli</artifactId>217             <version>8.0.11</version>218         </dependency>219 220         <dependency>221             <groupId>com.esotericsoftware.kryo</groupId>222             <artifactId>kryo</artifactId>223             <version>2.24.0</version>224         </dependency>225 226         <dependency>227             <groupId>de.javakaffee</groupId>228             <artifactId>kryo-serializers</artifactId>229             <version>0.26</version>230         </dependency>231 232         <dependency>233             <groupId>de.ruedigermoeller</groupId>234             <artifactId>fst</artifactId>235             <version>1.55</version>236         </dependency>237     </dependencies>238 239 240 </project>

其它注意事项：

dubbo构架中，zk充着“服务注册中心”的角色，所以生产者与消费者的xml配置文件中，都要配置zk地址，如果zk采用集群部署时，配置写法参考下面这样：

<dubbo:registry address="zookeeper://172.28.*.102:2181?backup=172.28.*.102:2182,172.28.*.102:2183"/>

 

dubbo还有一个管理界面，用于服务治理，包括启用/禁用服务，设置服务的路由规则（即：A地址的Consumer直接调用B机器的Provider，而不是由负载均衡算法分配）等等。

使用方法：将dubbo-admin这个项目编译成war包后，部署到jetty或其它兼容web server即可（当然要修改\WEB-INF\dubbo.properties里zk的地址）

部署完成后，访问管理界面时，默认用户名，密码均是root。 

另外dubbo-monitor项目用于性能监控，结合监控产生的数据，再套上一些图表展示的框架，可以用图表方式直观展示各种指标。

注：官网给出的dubbo-admin采用的webx架构有点老，而且除了淘宝之外，几乎没人在用，dubbo-monitor-simple界面也比较古朴，所以社区也人对其做了扩展，详情参考另一篇博客dubbox 的各种管理和监管

2016-02-25：dubbox依赖的spring虽然升级成3.x了，但版本还是有点低，spring都已经4.x了，为了方便我fork了一份，升级成spring 4.x 同时增加了log4j2的日志组件支持，详情见：dubbox升级spring到4.x及添加log4j2支持

 

参考文章：

http://shiyanjun.cn/archives/341.html

http://blog.csdn.net/wilsonke/article/details/39896595

http://www.dataguru.cn/thread-464197-1-1.html

http://www.iteye.com/magazines/103

http://dangdangdotcom.github.io/dubbox/rest.html

http://dangdangdotcom.github.io/dubbox/demo.html

http://blog.csdn.net/hzzhoushaoyu/article/details/43273099