一、dubbo简介
Dubbo是阿里巴巴公司开源的一个高性能优秀的服务框架,使得应用可通过高性能的 RPC 实现服务的输出和输入功能,可以和Spring框架无缝集成。
二、环境准备
本案例使用环境:jdk(1.8)、maven(3.2+)、zookeeper(3.4.10)、eclipse(Oxygen.3a Release (4.7.3a))、tomcat(tomcat8)
a、搭建注册中心(jdk、maven、tomcat、eclipse集成可以自行搜索安装)
1、本次实例使用zookeeper作为注册中心,下载地址:http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz
也可以去官网下载想要的版本,官网地址:http://zookeeper.apache.org/releases.html
2、解压 zookeeper-3.4.10.tar.gz,进入解压后conf目录下,复制zoo_sample.cfg文件,重命名为zoo.cfg即可
3、进入解压后bin目录,点击zkServer.cmd即可
b、搭建dubbo-admin控制台(可选)
1、下载源码安装 ,下载地址:https://github.com/apache/incubator-dubbo/tree/dubbo-2.5.8
也可以选择下载对应的版本。
2、解压后,打开cmd进入dubbo-admin目录下,如我解压的目录为:D:Testdubbo-masterdubbo-admin,在cmd下输入命令:mvn clean install
3、在target目录下生成dubbo-admin-2.5.8.war,然后将该war包放入tomcat的webapps目录下,启动tomcat, 访问localhost:[端口]/dubbo-admin-2.5.8,输入默认的用户名和密码:root/root
例如我访问的地址为:http://localhost:8088/dubbo-admin-2.5.8/
三、基于步骤二搭建的环境,使用ide开发JavaEE项目
a、新建一个maven父项目dubbo-demo-master,和三个maven子模块dubbo-demo-interface、dubbo-demo-service、dubbo-demo-web(不知道如何新建百度搜索:eclipse搭建maven多module项目)
1、完成后,添加相关项目依赖和插件,最后其dubbo-demo-master的pom.xml内容为(该maven工程packaging属性为pom),删除该工程的src目录(父工程不需要,只管理依赖):
<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>org.moy.maven</groupId> <artifactId>dubbo-demo-master</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>pom</packaging> <name>dubbo-demo-master</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <springVersion>4.3.0.RELEASE</springVersion> <dubboVersion>2.5.8</dubboVersion> <zkclientVersion>0.10</zkclientVersion> <zookeeperVersion>3.4.10</zookeeperVersion> <slf4jVersion>1.7.21</slf4jVersion> <mybatisVersion>3.4.4</mybatisVersion> <mybatisSpringVersion>1.3.0</mybatisSpringVersion> <mysqlVersion>6.0.5</mysqlVersion> <druidVersion>1.1.6</druidVersion> <junitVersion>4.12</junitVersion> <jacksonVersion>2.9.3</jacksonVersion> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junitVersion}</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${springVersion}</version> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatisSpringVersion}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatisVersion}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druidVersion}</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysqlVersion}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4jVersion}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jacksonVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>${zkclientVersion}</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>${zookeeperVersion}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>${dubboVersion}</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> </dependencies> </dependencyManagement> <modules> <module>dubbo-demo-interface</module> <module>dubbo-demo-service</module> <module>dubbo-demo-web</module> </modules> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.7.0</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <port>8080</port> <charset>${project.build.sourceEncoding}</charset> <server>tomcat7</server> </configuration> </plugin> </plugins> </build> </project>
2、完成后,其dubbo-demo-interface的pom.xml文件内容为(该maven工程packaging属性jar):
<?xml version="1.0"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.moy.maven</groupId> <artifactId>dubbo-demo-master</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>dubbo-demo-interface</artifactId> <name>dubbo-demo-interface Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> </dependencies> <build> <finalName>dubbo-demo-interface</finalName> </build> </project>
3、完成后,添加dubbo-demo-interface依赖,其dubbo-demo-service的pom.xml文件内容为(该maven工程packaging属性为war):
<?xml version="1.0"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.moy.maven</groupId> <artifactId>dubbo-demo-master</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>dubbo-demo-service</artifactId> <packaging>war</packaging> <name>dubbo-demo-service Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>org.moy.maven</groupId> <artifactId>dubbo-demo-interface</artifactId> <version>${project.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <exclusions> <exclusion> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> </dependencies> <build> <finalName>dubbo-demo-service</finalName> </build> </project>
4、完成后,添加dubbo-demo-interface依赖,其dubbo-demo-web的pom.xml文件内容为(该maven工程packaging属性为war):
<?xml version="1.0"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.moy.maven</groupId> <artifactId>dubbo-demo-master</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>dubbo-demo-web</artifactId> <packaging>war</packaging> <name>dubbo-demo-web Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>org.moy.maven</groupId> <artifactId>dubbo-demo-interface</artifactId> <version>${project.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <exclusions> <exclusion> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> </dependencies> <build> <finalName>dubbo-demo-web</finalName> </build> </project>
5、打开cmd进入dubbo-demo-master的pom.xml同级目录,执行mvn clean install ,其他子工程同理
b、编辑dubbo-demo-interface工程,新增服务接口UserService和实体User,删除必要文件(如:webapp文件),修改完成后在pom.xml目录下使用命令:mvn clean install
c、更新dubbo-demo-service的maven项目,编辑dubbo-demo-service工程,webapp只留下web.xml,删除不必要的jsp文件
1、BaseMapper
2、UserMapper
3、UserServiceImpl
4、UserMapper.xml
5、app.properties
jdbc.driverClass=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/whymoy?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC jdbc.username=xxx jdbc.password=xxx
6、import.sql
7、log4j.properties
8、mybatis-config.xml
9、spring-dao.xml
10、spring-dubbo-provider.xml
11、spring-tx.xml
12、spring.xml
13、UserMapperTest.java
14、web.xml
15、测试,创建app.properties配置的数据库和导入import.sql,运行UserMapperTest单元测试,如果出错就看日志定位。
d、更新dubbo-demo-web的maven项目,编辑dubbo-demo-web工程,webapp只留下web.xml,删除不必要的jsp文件
1、UserController.java
package com.moy.maven.controller; import java.util.List; import org.moy.maven.domain.User; import org.moy.maven.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; @Controller @RequestMapping("/users") public class UserController { @Autowired private UserService userService; @RequestMapping("/list") @ResponseBody public List<User> listUser() { List<User> userList = userService.findAll(); return userList; } }
2、log4j.properties
3、spring-dubbo-consumer.xml
4、spring-mvc.xml
5、web.xml
<!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> <display-name>Archetype Created Web Application</display-name> <!-- *** 编码拦截器开始(拦截器加载有顺序,放在最前面) *** --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <async-supported>true</async-supported> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- === 编码拦截器结束 === --> <!-- *** 初始化SpringMVC开始 *** --> <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-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <!-- === 初始化SpringMVC结束 === --> </web-app>
6、index.html
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> hello world! </body> </html>
四、集成测试
1、确保zookeeper是启动的
2、打开cmd进入dubbo-demo-master的pom.xml同级目录下,运行命令:mvn clean install
3、打开cmd进入dubbo-demo-service的pom.xml同级目录下,运行命令:mvn clean tomcat:run -Dmaven.tomcat.port=8098
4、打开cmd进入dubbo-demo-web的pom.xml同级目录下,运行命令:mvn clean tomcat:run -Dmaven.tomcat.port=8099
5、打开浏览器访问:http://localhost:8099/dubbo-demo-web/users/list.do接口,(接口数据是运行UserMapperTest单元测试来的)
6、dubbo-demo-service工程实现接口,运行时向zookeeper注册接口信息,dubbo-demo-web工程只需要依赖接口,在通过spring原有的方式调用接口,其中dubbo帮我们从zookeeper中查找相应接口信息,通过默认dubbo协议帮我们完成了rpc调用。可以通过控制台http://localhost:8088/dubbo-admin-2.5.8/查看对应服务,对服务进行治理。
yexiangyang
moyyexy@gmail.com