IntelliJ IDEA+Maven简单搭建dubbo框架

可以到我的github下载本demo：https://github.com/Feiyu123/DubboDemo.git

一.dubbo是什么：

       Dubbo(注：HSF提供的是分布式服务开发框架，taobao内部使用较多)是一个分布式服务框架，致力于提供高性能和透明化的RPC远程服务调用方案，以及SOA服务治理方案。简单的说，dubbo就是个服务框架，如果没有分布式的需求，其实是不需要用的，只有在分布式的时候，才有dubbo这样的分布式服务框架的需求，并且本质上是个服务调用的东东，说白了就是个远程服务调用的分布式框架

其核心部分包含:

     1. 远程通讯: 提供对多种基于长连接的NIO框架抽象封装，包括多种线程模型，序列化，以及“请求-响应”模式的信息交换方式。

     2. 集群容错: 提供基于接口方法的透明远程过程调用，包括多协议支持，以及软负载均衡，失败容错，地址路由，动态配置等集群支持。

     3. 自动发现: 基于注册中心目录服务，使服务消费方能动态的查找服务提供方，使地址透明，使服务提供方可以平滑增加或减少机器。

二.dubbo有什么用

    1.透明化的远程方法调用，就像调用本地方法一样调用远程方法，只需简单配置，没有任何API侵入。     

    2.软负载均衡及容错机制，可在内网替代F5等硬件负载均衡器，降低成本，减少单点。

    3. 服务自动注册与发现，不再需要写死服务提供方地址，注册中心基于接口名查询服务提供者的IP地址，并且能够平滑添加或删除服务提供者。

三.Dubbox  实现原理

节点角色说明：

       Provider: 暴露服务的服务提供方。

       Consumer: 调用远程服务的服务消费方。

       Zookeeper: Registry服务注册与发现的注册中心。

       Monitor: 统计服务的调用次调和调用时间的监控中心。

       Container: 服务运行容器。

四.dubbo项目搭建

下载zookeeper，zokeeper地址：http://zookeeper.apache.org/releases.html

如果下载不了请到我的百度云盘下载：https://pan.baidu.com/s/1tV1Pxx89fyQU6Ce5QsRN9Q

这里说明一下搭建目录：

Dubbo-parent为总工程，dubbo-provider，dubbo-consumer，dubbo-api都是子模块，dubbo-provider，dubbo-consumer又依赖于dubbo-api模块。

这里用idea作为开发IDE，构建Maven项目

1.先建Dubbo空项目（Empty Project）

2.建dubbo-parent总模块，File----New---Module，打包方式为pom

可以看一下它的pom

<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>

  <groupId>com.dubbo.parentgroupId>
  <artifactId>dubbo-parentartifactId>
  <version>1.0-SNAPSHOTversion>
  <modules>
    <module>../dubbo-providermodule>
    <module>../dubbo-consumermodule>
    <module>../dubbo-apimodule>
      <module>../dubbo-servicemodule>
  modules>
  <packaging>pompackaging>
  <properties>
    <maven.compiler.source>1.8maven.compiler.source>
    <maven.compiler.target>1.8maven.compiler.target>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>

    
    <spring.version>4.2.5.RELEASEspring.version>

    
    <mybatis.version>3.2.8mybatis.version>

    
    <mysql-driver.version>5.1.29mysql-driver.version>

    
    <slf4j.version>1.7.18slf4j.version>
    <log4j.version>1.2.17log4j.version>

  properties>
  <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>3.8.1version>
      <scope>testscope>
    dependency>
    
    <dependency>
      <groupId>jstlgroupId>
      <artifactId>jstlartifactId>
      <version>1.2version>
    dependency>

    <dependency>
      <groupId>javaxgroupId>
      <artifactId>javaee-apiartifactId>
      <version>7.0version>
    dependency>

    
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.11version>
      
      <scope>testscope>
    dependency>

    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-coreartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-oxmartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-txartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-jdbcartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webmvcartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-contextartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-context-supportartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-aopartifactId>
      <version>${spring.version}version>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-testartifactId>
      <version>${spring.version}version>
    dependency>

    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatisartifactId>
      <version>${mybatis.version}version>
    dependency>

    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatis-springartifactId>
      <version>1.2.2version>
    dependency>

    
    <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      <version>${mysql-driver.version}version>
    dependency>
    
    <dependency>
      <groupId>commons-dbcpgroupId>
      <artifactId>commons-dbcpartifactId>
      <version>1.2.2version>
    dependency>

    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>fastjsonartifactId>
      <version>1.2.22version>
    dependency>

    
    <dependency>
      <groupId>log4jgroupId>
      <artifactId>log4jartifactId>
      <version>${log4j.version}version>
    dependency>
    <dependency>
      <groupId>org.slf4jgroupId>
      <artifactId>slf4j-apiartifactId>
      <version>${slf4j.version}version>
    dependency>
    <dependency>
      <groupId>org.slf4jgroupId>
      <artifactId>slf4j-log4j12artifactId>
      <version>${slf4j.version}version>
    dependency>

    
    
    <dependency>
      <groupId>org.codehaus.jacksongroupId>
      <artifactId>jackson-mapper-aslartifactId>
      <version>1.9.13version>
    dependency>
    
    <dependency>
      <groupId>com.fasterxml.jackson.coregroupId>
      <artifactId>jackson-coreartifactId>
      <version>2.8.0version>
    dependency>
    
    <dependency>
      <groupId>com.fasterxml.jackson.coregroupId>
      <artifactId>jackson-databindartifactId>
      <version>2.8.0version>
    dependency>

    <dependency>
      <groupId>commons-fileuploadgroupId>
      <artifactId>commons-fileuploadartifactId>
      <version>1.3.1version>
    dependency>

    <dependency>
      <groupId>commons-iogroupId>
      <artifactId>commons-ioartifactId>
      <version>2.4version>
    dependency>

    <dependency>
      <groupId>commons-codecgroupId>
      <artifactId>commons-codecartifactId>
      <version>1.9version>
    dependency>

    <dependency>
      <groupId>org.quartz-schedulergroupId>
      <artifactId>quartzartifactId>
      <version>2.2.1version>
    dependency>

    <dependency>
      <groupId>org.apache.shirogroupId>
      <artifactId>shiro-coreartifactId>
      <version>1.3.2version>
    dependency>
    <dependency>
      <groupId>org.apache.shirogroupId>
      <artifactId>shiro-webartifactId>
      <version>1.3.2version>
    dependency>
    <dependency>
      <groupId>org.apache.shirogroupId>
      <artifactId>shiro-springartifactId>
      <version>1.3.2version>
    dependency>
    <dependency>
      <groupId>org.apache.shirogroupId>
      <artifactId>shiro-ehcacheartifactId>
      <version>1.3.2version>
    dependency>
    <dependency>
      <groupId>org.apache.zookeepergroupId>
      <artifactId>zookeeperartifactId>
      <version>3.4.9version>
    dependency>
    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>dubboartifactId>
      <version>2.5.3version>
      <exclusions>
        <exclusion>
          <groupId>org.springframeworkgroupId>
          <artifactId>springartifactId>
        exclusion>
      exclusions>
    dependency>
    <dependency>
      <groupId>com.101tecgroupId>
      <artifactId>zkclientartifactId>
      <version>0.10version>
    dependency>

  dependencies>
  <distributionManagement>
    <site>
      <id>websiteid>
      <url>scp://webhost.company.com/www/websiteurl>
    site>
  distributionManagement>
  <build>
    <finalName>dubbo-parentfinalName>
  build>


project>

3.构建dubbo-provider模块，File----New---Module，打包方式为war

看一下它的pom：

<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>dubbo-parentartifactId>
        <groupId>com.dubbo.parentgroupId>
        <version>1.0-SNAPSHOTversion>
        <relativePath>../dubbo-parent/pom.xmlrelativePath>
    parent>
    <modelVersion>4.0.0modelVersion>

    <groupId>com.dubbo.parentgroupId>
    <artifactId>dubbo-providerartifactId>
    <version>1.0-SNAPSHOTversion>
    <packaging>warpackaging>

    <name>dubbo-providername>
    <url>http://maven.apache.orgurl>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    properties>

    <dependencies>
        <dependency>
            <groupId>com.dubbo.apigroupId>
            <artifactId>dubbo-apiartifactId>
            <version>1.0-SNAPSHOTversion>
        dependency>
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>3.8.1version>
            <scope>testscope>
        dependency>
    dependencies>
    <build>
        <finalName>dubbo-providerfinalName>
    build>
project>

4.构建dubbo-api和构建dubbo-consumer模块，File----New---Module，打包方式为war

构建dubbo-api和构建dubbo-consumer和以上provider差不多，父工程是dubbo-parent，只不过dubbo-api是独立模块，

dubbo-consumer和dubbo-provider需要依赖dubbo-api

看一下dubbo-api的pom

<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>dubbo-parentartifactId>
        <groupId>com.dubbo.parentgroupId>
        <version>1.0-SNAPSHOTversion>
        <relativePath>../dubbo-parent/pom.xmlrelativePath>
    parent>
    <modelVersion>4.0.0modelVersion>

    <groupId>com.dubbo.apigroupId>
    <artifactId>dubbo-apiartifactId>
    <version>1.0-SNAPSHOTversion>
    <packaging>warpackaging>

    <name>dubbo-apiname>
    <url>http://maven.apache.orgurl>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    properties>

    <dependencies>
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>3.8.1version>
            <scope>testscope>
        dependency>
    dependencies>
    <build>
        <finalName>dubbo-apifinalName>
    build>
project>

再看一下dubbo-consumer的pom

<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>dubbo-parentartifactId>
        <groupId>com.dubbo.parentgroupId>
        <version>1.0-SNAPSHOTversion>
        <relativePath>../dubbo-parent/pom.xmlrelativePath>
    parent>
    <modelVersion>4.0.0modelVersion>

    <groupId>com.dubbo.consumergroupId>
    <artifactId>dubbo-consumerartifactId>
    <packaging>warpackaging>

    <name>dubbo-consumername>
    <url>http://maven.apache.orgurl>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    properties>

    <dependencies>
        <dependency>
            <groupId>com.dubbo.apigroupId>
            <artifactId>dubbo-apiartifactId>
            <version>1.0-SNAPSHOTversion>
        dependency>
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>3.8.1version>
            <scope>testscope>
        dependency>
    dependencies>
    <build>
        <finalName>dubbo-consumerfinalName>
    build>
project>

5.编写接口

在dubbo-api的src/main/java目录下加一个接口UserService

在dubbo-consumer的src/main/java目录下加一个Consumer类

在dubbo-consumer的src/main/resources目录下加一个consumer.xml,这里为配置zookeeper的客户端

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">
    <dubbo:application name="demotest-consumer" owner="programmer" organization="dubbox"/>
    
    <dubbo:registry address="zookeeper://localhost:2181"/>
    
    <dubbo:reference id="permissionService" interface="com.dubbo.api.UserService"/>
beans>

在dubbo-provider的src/main/java目录下加一个Provider类以及UserServiceImpl接口实现类

UserServiceImpl接口实现类

package com.dubbo.provider;

import com.dubbo.api.UserService;

import java.util.HashMap;
import java.util.Map;

public class UserServiceImpl implements UserService {
    @Override
    public Map getUserInfo(int id) {
        Map map = new HashMap<>();
        map.put("name","张三");
        map.put("sex","男");
        map.put("id",id);
        return map;
    }
}

在dubbo-provider的src/main/resources目录下加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">
    
    <dubbo:application name="demotest-provider" owner="programmer" organization="dubbox"/>
    
    <dubbo:registry address="zookeeper://localhost:2181"/>
    
    <dubbo:protocol name="dubbo" port="20880" />
    
    <dubbo:service interface="com.dubbo.api.UserService" ref="userService" protocol="dubbo" />
    
    <bean id="userService" class="com.dubbo.provider.UserServiceImpl"/>
beans>

五.运行项目

1.找到zookeeper的bin目录下的zkServer.cmd，双击并运行

zookeeper服务端已经开启

接下来分别启动Provider和Consumer两个类

可以看到provider和consumer均正常启动，且consumer可以正常调用provider那边的接口实现类。provider实现api的接口并向zookeeper注册中心注册接口，然后consumer向zookeeper注册中心订阅接口。这里Provider和consumer都是用的zookeeper的客户端，如果需要进行调用，host和port必须一致。