本次作者建立了一个小Demo来说明如何使用Dubbo实现解耦和的项目部署方式
作者使用的开发工具是idea,大家也可以使用eclipse或者myeclipse.
首先使用idea创建一个maven项目,
其中包括了5个子模块,分别是
- dao
- daoimpl
- service
- serviceimpl
- web
项目结构如下图,请原谅画的比较…..(额..抽象)
最上面是dubbodemo的项目,旗下分为5个子模块.
他们的依赖关系分别如图所示
- daoimpl→dao
- serviceimpl→service
- serviceimpl→dao
- web→service
具体需要的jar包pom文件如下
<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>4.0.0modelVersion>
<properties>
<spring.version>4.3.9.RELEASEspring.version>
<jedis.version>2.9.0jedis.version>
<dubbo.version>2.5.5dubbo.version>
<junit.version>4.12junit.version>
<jackson.version>2.9.1jackson.version>
properties>
<groupId>com.dsjgroupId>
<artifactId>dubbodemoartifactId>
<version>1.0-SNAPSHOTversion>
<modules>
<module>daomodule>
<module>daoimplmodule>
<module>servicemodule>
<module>serviceimplmodule>
<module>webmodule>
modules>
<packaging>pompackaging>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>redis.clientsgroupId>
<artifactId>jedisartifactId>
<version>${jedis.version}version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>dubboartifactId>
<version>${dubbo.version}version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>${junit.version}version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>${spring.version}version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>${jackson.version}version>
dependency>
dependencies>
dependencyManagement>
project>
首先我们来编写一下dao,比如用户使用dao提供的服务
public interface UserDao {
int add(int i,int n);
}
显而易见,我们的dao只提供了一个add,下面编写daoimpl
注:所有的模块均使用maven,包括打包
接下来是daoimpl的pom文件
<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>dubbodemoartifactId>
<groupId>com.dsjgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>dao-implartifactId>
<dependencies>
<dependency>
<groupId>com.dsjgroupId>
<artifactId>daoartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
dependency>
<dependency>
<groupId>redis.clientsgroupId>
<artifactId>jedisartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>dubboartifactId>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-jar-pluginartifactId>
<configuration> <classesDirectory>target/classes/classesDirectory>
<archive>
<manifest>
<mainClass>com.alibaba.dubbo.container.MainmainClass>
<useUniqueVersions>falseuseUniqueVersions>
<addClasspath>trueaddClasspath>
<classpathPrefix>lib/classpathPrefix>
manifest>
<manifestEntries>
<Class-Path>.Class-Path>
manifestEntries>
archive>
configuration>
plugin>
<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-dependency-pluginartifactId>
<executions>
<execution>
<id>copy-dependenciesid>
<phase>packagephase>
<goals>
<goal>copy-dependenciesgoal>
goals>
<configuration>
<type>jartype>
<includeTypes>jarincludeTypes>
<outputDirectory>
${project.build.directory}/lib
outputDirectory>
configuration>
execution>
executions>
plugin>
plugins>
<resources>
<resource>
<targetPath>${project.build.directory}/classestargetPath>
<directory>src/main/resourcesdirectory>
<filtering>truefiltering>
<includes>
<include>**/*.xmlinclude>
<include>**/*.propertiesinclude>
includes>
resource>
<resource>
<targetPath>${project.build.directory}/classes/META-INF/springtargetPath>
<directory>src/main/resourcesdirectory>
<filtering>truefiltering>
<includes>
<include>spring-dao-impl.xmlinclude>
includes>
resource>
resources>
build>
project>
以及Spring的配置文件
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
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://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<context:component-scan base-package="com.dsj"/>
<dubbo:application name="dsj-dao"/>
<dubbo:registry protocol="redis" address="192.168.201.113:6379" />
<bean id="userDao" class="com.dsj.dao.UserDaoImpl"/>
<dubbo:service interface="com.dsj.dao.UserDao" ref="userDao"/>
beans>
接下来是dao的实现类daoimpl,被调用之后会在控制台打印使用dubbo提供加法服务
import com.alibaba.dubbo.config.annotation.Service;
import org.springframework.stereotype.Repository;
/**
* Created by Administrator on 2017/9/20 0020.
*/
@Repository
@Service
public class UserDaoImpl implements UserDao{
public int add(int i, int n) {
System.out.println("使用dubbo提供加法服务");
return i+n;
}
}
同时 写一个运行时的类运行jar包时候自动执行该类的main方法
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
/**
* Created by Administrator on 2017/9/24 0024.
*/
public class RunJar {
public static void main(String[] args) throws IOException {
if (args.length==0){
System.err.println("Useage:java jar dao.1.0-SNAPSHOT.jar spring-dao-impl.xml");
}else {
ApplicationContext ac=new ClassPathXmlApplicationContext("args[0]");
System.out.println("服务已启动,按回车停止");
System.in.read();
}
}
}
接下来service不做过多的赘述和dao相同
serviceimpl中的spring-service-impl.xml
文件如下
<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"
xmlns:context="http://www.springframework.org/schema/context"
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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.dsj"/>
<dubbo:application name="dsj-service"/>
<dubbo:registry protocol="redis" address="192.168.201.113:6379" />
<dubbo:reference id="userDao" interface="com.dsj.dao.UserDao"/>
<dubbo:protocol name="dubbo" port="20888"/>
<bean id="userService" class="com.dsj.service.UserServiceImpl">
<property name="userDao" ref="userDao"/>
bean>
<dubbo:service interface="com.dsj.service.UserService" ref="userService"/>
beans>
以及pom文件中的设置
<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>dubbodemoartifactId>
<groupId>com.dsjgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>service-implartifactId>
<dependencies>
<dependency>
<groupId>com.dsjgroupId>
<artifactId>serviceartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>com.dsjgroupId>
<artifactId>daoartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>com.dsjgroupId>
<artifactId>daoartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
dependency>
<dependency>
<groupId>redis.clientsgroupId>
<artifactId>jedisartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>dubboartifactId>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-jar-pluginartifactId>
<configuration>
<classesDirectory>target/classes/classesDirectory>
<archive>
<manifest>
<mainClass>com.alibaba.dubbo.container.MainmainClass>
<useUniqueVersions>falseuseUniqueVersions>
<addClasspath>trueaddClasspath>
<classpathPrefix>lib/classpathPrefix>
manifest>
<manifestEntries>
<Class-Path>.Class-Path>
manifestEntries>
archive>
configuration>
plugin>
<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-dependency-pluginartifactId>
<executions>
<execution>
<id>copy-dependenciesid>
<phase>packagephase>
<goals>
<goal>copy-dependenciesgoal>
goals>
<configuration>
<type>jartype>
<includeTypes>jarincludeTypes>
<outputDirectory>
${project.build.directory}/lib
outputDirectory>
configuration>
execution>
executions>
plugin>
plugins>
<resources>
<resource>
<targetPath>${project.build.directory}/classestargetPath>
<directory>src/main/resourcesdirectory>
<filtering>truefiltering>
<includes>
<include>**/*.xmlinclude>
<include>**/*.propertiesinclude>
includes>
resource>
<resource>
<targetPath>${project.build.directory}/classes/META-INF/springtargetPath>
<directory>src/main/resourcesdirectory>
<filtering>truefiltering>
<includes>
<include>spring-service-impl.xmlinclude>
includes>
resource>
resources>
build>
project>
当然少不了运行时的main方法
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* Created by Administrator on 2017/9/24 0024.
*/
public class RunJar {
public static void main(String[] args) {
ApplicationContext ac=new ClassPathXmlApplicationContext("spring-service-impl.xml");
UserService us=ac.getBean(UserService.class);
us.add(5,6);
}
}
还有serviceimp
import com.dsj.dao.UserDao;
/**
* Created by Administrator on 2017/9/20 0020.
*/
public class UserServiceImpl implements UserService {
private UserDao userDao;
public UserDao getUserDao() {
return userDao;
}
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
public int add(int i, int n) {
System.out.println(String.format("开始计算%d+%d的结果,等待dubbo服务响应",i,n));
int sum=userDao.add(i,n);
System.out.println(sum);
return sum;
}
}
最后一个模块web模块
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>dubbodemoartifactId>
<groupId>com.dsjgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>webartifactId>
<packaging>warpackaging>
<dependencies>
<dependency>
<groupId>com.dsjgroupId>
<artifactId>serviceartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
dependency>
<dependency>
<groupId>redis.clientsgroupId>
<artifactId>jedisartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>dubboartifactId>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
dependency>
dependencies>
project>
spring-webmvc.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" 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://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://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<context:component-scan base-package="com.dsj"/>
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
<dubbo:annotation/>
<dubbo:application name="dsj-web"/>
<dubbo:registry protocol="redis" address="192.168.201.113:6379" />
<dubbo:reference interface ="com.dsj.service.UserService" id ="userService"/>
beans>
UserController
package com.dsj.controller;
import com.dsj.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.annotation.Resource;
import java.util.HashMap;
import java.util.Map;
/**
* Created by Administrator on 2017/9/24 0024.
*/
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
private UserService userService;
@RequestMapping("/add")
@ResponseBody
public Map add(Integer i, Integer n) {
Map data = new HashMap();
int sum = userService.add(i, n);
data.put("result", sum);
return data;
}
}
webapp/WEB-INF下的web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>spring-webmvcservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-webmvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>spring-webmvcservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
web-app>
以及一个非常简单的页面
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Titletitle>
<script src="../js/jquery-1.10.2.min.js">script>
<script>
$(function () {
$('button').click(function () {
var num1=$('#num1').val();
var num2=$('#num2').val();
$.get("add",{"i":num1,"n":num2},function (data) {
$('#rs').val(data.result);
})
})
})
script>
head>
<body>
<input type="number" id="num1">+<input type="number" id="num2"><button>=button><input type="number" id="rs">
body>
html>
首先使用idea的工具
将 daoimpl
serviceimpl
web
三个模块分别进行打包
除了web是war包意外 前两个均为jar包 我们的maven配置方式可以直接运行打包好的jar
接下来在磁盘上找到打包好的jar包
打开一个终端执行
java -jar dao-xxx.jar
serviceimpl同上
注意运行的顺序,第一个是daoimpl
然后serviceimpl
最后是tomcat
将web打包好的war包放在tomcat的webapp下 改名为ROOT
如果之前使用过tomcat需要先将ROOT文件夹删除
就像这样
接下来运行tomcat的启动脚本
作者是在windows环境下运行所以启动的是bin目录下的startup.bat
其实这三个部分可以分别放在三台不同的主机上,也就是真正实现了代码的解耦
最后部署结构如下