微服务之 -- dubbox初次使用

介绍就免了，自己行百度。

官网地址：https://github.com/dangdangdotcom/dubbox

Dubbox需要什么版本的JDK？

目前最好在JDK 1.7以上运行

Dubbo REST的服务能和Dubbo注册中心、监控中心集成吗？

可以的，而且是自动集成的，也就是你在dubbo中开发的所有REST服务都会自动注册到服务册中心和监控中心，可以通过它们做管理。

但是，只有当REST的消费端也是基于dubbo的时候，注册中心中的许多服务治理操作才能完全起作用。而如果消费端是非dubbo的，自然不受注册中心管理，所以其中很多操作是不会对消费端起作用的。

不废话，代码可以说明一切

可以参考官方的文档 http://dangdangdotcom.github.io/dubbox/rest.html

一、先从git上面下载项目，然后在项目根目录执行mvn install，执行完成之后将下图中红色框里面的war包放tomcat里面运行。

二、创建如下项目

项目程序结构如图：

1、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>hvgroup</groupId>  <artifactId>com</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>war</packaging>  <name>dbxtest</name>  <dependencies>        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>dubbo-demo-api</artifactId>            <version>2.8.4</version>        </dependency>        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>dubbo</artifactId>            <version>2.8.4</version>        </dependency>        <dependency>            <groupId>org.javassist</groupId>            <artifactId>javassist</artifactId>            <version>3.20.0-GA</version>        </dependency>        <dependency>            <groupId>io.netty</groupId>            <artifactId>netty</artifactId>            <version>3.7.0.Final</version>        </dependency>        <dependency>            <groupId>org.apache.mina</groupId>            <artifactId>mina-core</artifactId>            <version>1.1.7</version>        </dependency>        <dependency>            <groupId>org.glassfish.grizzly</groupId>            <artifactId>grizzly-core</artifactId>            <version>2.1.4</version>        </dependency>        <dependency>            <groupId>org.apache.httpcomponents</groupId>            <artifactId>httpclient</artifactId>            <version>4.2.1</version>        </dependency>        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>fastjson</artifactId>            <version>1.1.39</version>        </dependency>        <dependency>            <groupId>com.thoughtworks.xstream</groupId>            <artifactId>xstream</artifactId>            <version>1.4.1</version>        </dependency>        <dependency>            <groupId>org.apache.bsf</groupId>            <artifactId>bsf-api</artifactId>            <version>3.1</version>        </dependency>        <dependency>            <groupId>org.apache.zookeeper</groupId>            <artifactId>zookeeper</artifactId>            <version>3.4.6</version>        </dependency>        <dependency>            <groupId>com.github.sgroschupf</groupId>            <artifactId>zkclient</artifactId>            <version>0.1</version>        </dependency>        <dependency>            <groupId>org.apache.curator</groupId>            <artifactId>curator-framework</artifactId>            <version>2.5.0</version>        </dependency>        <dependency>            <groupId>com.googlecode.xmemcached</groupId>            <artifactId>xmemcached</artifactId>            <version>1.3.6</version>        </dependency>        <dependency>            <groupId>org.apache.cxf</groupId>            <artifactId>cxf-rt-frontend-simple</artifactId>            <version>2.6.1</version>        </dependency>        <dependency>            <groupId>org.apache.cxf</groupId>            <artifactId>cxf-rt-transports-http</artifactId>            <version>2.6.1</version>        </dependency>        <dependency>            <groupId>org.apache.thrift</groupId>            <artifactId>libthrift</artifactId>            <version>0.8.0</version>        </dependency>        <dependency>            <groupId>com.caucho</groupId>            <artifactId>hessian</artifactId>            <version>4.0.7</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>        </dependency>        <dependency>            <groupId>org.mortbay.jetty</groupId>            <artifactId>jetty</artifactId>            <exclusions>                <exclusion>                    <groupId>org.mortbay.jetty</groupId>                    <artifactId>servlet-api</artifactId>                </exclusion>            </exclusions>            <version>6.1.26</version>        </dependency>        <dependency>            <groupId>log4j</groupId>            <artifactId>log4j</artifactId>            <version>1.2.16</version>        </dependency>        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-api</artifactId>            <version>1.6.2</version>        </dependency>        <dependency>            <groupId>redis.clients</groupId>            <artifactId>jedis</artifactId>            <version>2.1.0</version>        </dependency>        <dependency>            <groupId>javax.validation</groupId>            <artifactId>validation-api</artifactId>            <version>1.0.0.GA</version>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-validator</artifactId>            <version>4.2.0.Final</version>        </dependency>        <dependency>            <groupId>javax.cache</groupId>            <artifactId>cache-api</artifactId>            <version>0.4</version>        </dependency>        <dependency>            <groupId>org.jboss.resteasy</groupId>            <artifactId>resteasy-jaxrs</artifactId>            <version>3.0.7.Final</version>        </dependency>        <dependency>            <groupId>org.jboss.resteasy</groupId>            <artifactId>resteasy-client</artifactId>            <version>3.0.7.Final</version>        </dependency>        <dependency>            <groupId>org.jboss.resteasy</groupId>            <artifactId>resteasy-netty</artifactId>            <version>3.0.7.Final</version>        </dependency>        <dependency>            <groupId>org.jboss.resteasy</groupId>            <artifactId>resteasy-jdk-http</artifactId>            <version>3.0.7.Final</version>        </dependency>        <dependency>            <groupId>org.jboss.resteasy</groupId>            <artifactId>resteasy-jackson-provider</artifactId>            <version>3.0.7.Final</version>        </dependency>        <dependency>            <groupId>org.jboss.resteasy</groupId>            <artifactId>resteasy-jaxb-provider</artifactId>            <version>3.0.7.Final</version>        </dependency>        <dependency>            <groupId>org.apache.tomcat.embed</groupId>            <artifactId>tomcat-embed-core</artifactId>            <version>8.0.11</version>        </dependency>        <dependency>            <groupId>org.apache.tomcat.embed</groupId>            <artifactId>tomcat-embed-logging-juli</artifactId>            <version>8.0.11</version>        </dependency>        <dependency>            <groupId>com.esotericsoftware.kryo</groupId>            <artifactId>kryo</artifactId>            <version>2.24.0</version>        </dependency>        <dependency>            <groupId>de.javakaffee</groupId>            <artifactId>kryo-serializers</artifactId>            <version>0.26</version>        </dependency>        <dependency>            <groupId>de.ruedigermoeller</groupId>            <artifactId>fst</artifactId>            <version>1.55</version>        </dependency>    </dependencies>  <build>    <plugins>      <plugin>        <artifactId>maven-compiler-plugin</artifactId>        <configuration>          <source>1.6</source>          <target>1.6</target>        </configuration>      </plugin>    </plugins>  </build></project>

2、User.java

package com.hvgroup.user;import java.io.Serializable;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 org.codehaus.jackson.annotate.JsonProperty;@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 + '\'' +                ')';    }}

3、UserService.java

package com.hvgroup.user;public interface  UserService {       void registerUser(User user);   User getUser(Long id);}

4、UserServiceImpl.java

package com.hvgroup.user;public class UserServiceImpl implements UserService {    public void registerUser(User user) {        // save the user...    }        public User getUser(Long id) {        return new User(id, "username" + id);    }}

5、UserServiceWebImpl.java

package com.hvgroup.user;import com.alibaba.dubbo.rpc.RpcContext;import com.hvgroup.user.User;import com.hvgroup.user.UserService;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.ws.rs.Consumes;import javax.ws.rs.GET;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.Produces;import org.slf4j.Logger;import org.slf4j.LoggerFactory;@Path("users")@Consumes({"application/json", "text/xml"})@Produces({"application/json; charset=UTF-8", "text/xml; charset=UTF-8"})public class UserServiceWebImpl implements UserService {    private static final Logger logger = LoggerFactory.getLogger(UserServiceWebImpl.class);    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: " + ((HttpServletRequest)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 this.userService.getUser(id);    }    @POST    @Path("register")    public void registerUser(User user) {    }}

6、dubbo-demo-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-2.5.xsdhttp://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">    <dubbo:application name="dubboxtest" owner="programmer" organization="dubbox"/>    <dubbo:registry address="zookeeper://192.168.89.135:2181"/>            <!-- 用rest协议在8080端口暴露服务 --><dubbo:protocol name="rest" port="8888" threads="500"  server="tomcat" accepts="500"                    extension="com.alibaba.dubbo.demo.extension.TraceInterceptor,                    com.alibaba.dubbo.demo.extension.TraceFilter,                    com.alibaba.dubbo.demo.extension.ClientTraceFilter,                    com.alibaba.dubbo.demo.extension.DynamicTraceBinding,                    com.alibaba.dubbo.demo.extension.CustomExceptionMapper,                    com.alibaba.dubbo.rpc.protocol.rest.support.LoggingFilter"/><!-- <dubbo:protocol name="rest" port="8888" contextpath="dbxtest" server="servlet" />  --><!-- 声明需要暴露的服务接口 --><dubbo:service interface="com.hvgroup.user.UserWebService" ref="userWebService" protocol="rest" validation="true"/><!-- <dubbo:service interface="com.hvgroup.user.UserWebService" ref="userWebService"/> --><!-- 和本地bean一样实现服务 --><bean id="userService" class="com.hvgroup.user.UserServiceImpl" /><bean id="userWebService" class="com.hvgroup.user.UserServiceWebImpl">        <property name="userService" ref="userService"/>    </bean></beans>

7、log4j.xml

<?xml version="1.0" encoding="UTF-8"?><!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>

8、web.xml

<?xml version="1.0"?><!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app>    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>/WEB-INF/classes/dubbo-demo-provider.xml</param-value>    </context-param>    <listener>        <listener-class>com.alibaba.dubbo.remoting.http.servlet.BootstrapListener</listener-class>    </listener>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <servlet>        <servlet-name>dispatcher</servlet-name>        <servlet-class>com.alibaba.dubbo.remoting.http.servlet.DispatcherServlet</servlet-class>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>dispatcher</servlet-name>        <url-pattern>/*</url-pattern>    </servlet-mapping></web-app>

三、将新创建的项目部署到tomcat里面运行起来。

四、在浏览器上面 http://localhost:8888/users/1001