Dubbo : 传统工程改造(二)

目录

传统工程为什么改造

引用官方文档的说明:

改造思路

对于一个MVC开发模式的项目,我们需要将CV层放在一个项目中,而M单独放在一个项目中.中间接口约定需要一个单独的项目打成jar包形式分别引入.

一个简单的例子(省略了DB相关操作):

UserService.java

public interface UserService {    public String getUser(String username);}

UserServiceImpl.java

@Service("userFacede")public class UserServiceImpl implements UserService{    Logger log = Logger.getLogger(UserServiceImpl.class);    public String getUser(String username) {        log.info("UserService Be Visited");        if (username.equals("milo")){            return "hello milo";        }else{            return "hello guest";        }    }}

UserController.java

@Controllerpublic class UserController {    Logger log = Logger.getLogger(UserController.class);    @Autowired    private UserService userService;    @RequestMapping("/user")    public String User(String username, HttpServletRequest request, HttpServletResponse response){        log.info("userController Be Visited");        request.setAttribute("username",userService.getUser(username));        return "user";    }}

要改成Dubbo项目,我们需要将业务逻辑层与控制层+试图层分离,所以我们将项目改成如下样子:

• dubbodemo-parent : 父项目,定义jar包版本号,聚合所有maven项目(module)等.
• dubbodemo-facede : 定义接口,这个项目是要打成jar包分别被dubbodemo-service和dubbodemo-web引用的
• dubbodemo-service : 只做逻辑实现,也就是dubbo中的生产者

• dubbodemo-web : 负责页面跳转及渲染,也就是dubbo中的消费者

  分别展开讲下这几个项目:
  dubbodemo-facede : 这个项目是不需要引入spring框架的.定义好接口,pom.xml中jar的打包方式就可以了.
  dubbodemo-service : 需要引入 dubbodemo-facede项目(module),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">    <parent>        <artifactId>dubbodemo-parent</artifactId>        <groupId>cn.milo.dubbodemo</groupId>        <version>1.0-SNAPSHOT</version>    </parent>    <modelVersion>4.0.0</modelVersion>    <artifactId>dubbodemo-service</artifactId>    <packaging>war</packaging>    <name>dubbodemo-service</name>    <url>http://maven.apache.org</url>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>    </properties>    <dependencies>        <dependency>            <groupId>cn.milo.dubbodemo</groupId>            <artifactId>dubbodemo-facede</artifactId>            <version>${dubbodemo-facede.version}</version>        </dependency>        <!-- dubbo -->        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>dubbo</artifactId>        </dependency>        <!-- Zookeeper-->        <dependency>            <groupId>com.github.sgroschupf</groupId>            <artifactId>zkclient</artifactId>        </dependency>        <!-- log4j -->        <dependency>            <groupId>log4j</groupId>            <artifactId>log4j</artifactId>        </dependency>        <!-- Spring Begin -->              .              .              .        <!-- Spring End -->    </dependencies></project>

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">    <!-- 提供方应用信息，用于计算依赖关系 -->    <dubbo:application name="gw-service-user" />    <!-- 使用zookeeper注册中心暴露服务地址 -->    <dubbo:registry protocol="zookeeper" address="47.94.81.**:2181" />    <!-- 用dubbo协议在20880端口暴露服务 -->    <dubbo:protocol name="dubbo" port="20880" />    <!-- 用户服务接口 -->    <dubbo:service interface="cn.milo.dubboservice.UserService" ref="userFacede" /></beans>  

dubbodemo-web: 同样需要引入 dubbodemo-facede项目(module),pom.xml和dubbodemo-service一样

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="edu-web-boss" />    <!-- 使用zookeeper注册中心暴露服务地址 -->    <!-- 注册中心地址 -->    <dubbo:registry protocol="zookeeper" address="47.94.81.162:2181" />    <!-- 用户服务接口 这里的id可以随便写哈 -->    <dubbo:reference interface="cn.milo.dubboservice.UserService" id="admin" check="false" /></beans>  

项目源码

http://download.csdn.net/download/shangmingtao/9983768