玩转Spring Boot 集成Dubbo

玩转Spring Boot 集成Dubbo

      使用Spring Boot 与Dubbo集成，这里我之前尝试了使用注解的方式，简单的使用注解注册服务其实是没有问题的，但是当你涉及到使用注解的时候在服务里面引用事务，注入其他对象的时候，会有一些问题。于是我就果断放弃了注解了，使用的是XML，这里可能介绍的是Dubbo，但是如果使用Dubbox的话，基本上是兼容的。接下来，将说说使用XML的方式与Spring Boot在一起开发。

1.创建工程在pom.xml中加入依赖

      创建工程名为：

      （1）springboot-dubbo-provide

      （2）springboot-dubbo-api

      （3）springboot-dubbo-consume

        springboot-dubbo-api工程主要是放一些service接口，用于提供给消费者使用 。springboot-dubbo-provide工程用于提供服务。  springboot-dubbo-consume工程为消费者。在springboot-dubbo-provide工程中打开pom.xml加入以下依赖，完整代码如下：

 <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>
     <groupId>com.chengligroupId>
     <artifactId>springboot-dubbo-provideartifactId>
     <version>0.0.1-SNAPSHOTversion>
     <packaging>jarpackaging>
     <name>springboot-dubbo-providename>
     <url>http://maven.apache.orgurl>
     <parent>
         <groupId>org.springframework.bootgroupId>
         <artifactId>spring-boot-starter-parentartifactId>
         <version>1.4.3.RELEASEversion>
     parent>
     <properties>
         <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
         <java.version>1.8java.version>
         <com.alibaba.dubbo.version>2.5.3com.alibaba.dubbo.version>
         <org.apache.zookeeper.version>3.4.6org.apache.zookeeper.version>
         <com.github.sgroschupf.zkclient.version>0.1com.github.sgroschupf.zkclient.version>
     properties>
     <dependencies>
         <dependency>
             <groupId>com.chengligroupId>
             <artifactId>springboot-dubbo-apiartifactId>
             <version>0.0.1-SNAPSHOTversion>
         dependency>
         <dependency>
             <groupId>org.springframework.bootgroupId>
             <artifactId>spring-boot-starterartifactId>
         dependency>

         <dependency>
             <groupId>com.alibabagroupId>
             <artifactId>dubboartifactId>
             <exclusions>
                 <exclusion>
                     <groupId>org.springframeworkgroupId>
                     <artifactId>springartifactId>
                 exclusion>
             exclusions>
             <version>${com.alibaba.dubbo.version}version>
         dependency>
         <dependency>
             <groupId>org.apache.zookeepergroupId>
             <artifactId>zookeeperartifactId>
             <version>${org.apache.zookeeper.version}version>
         dependency>
         <dependency>
             <groupId>com.github.sgroschupfgroupId>
             <artifactId>zkclientartifactId>
             <version>${com.github.sgroschupf.zkclient.version}version>
         dependency>
     dependencies>
     <build>
         <plugins>
             <plugin>
                 <groupId>org.springframework.bootgroupId>
                 <artifactId>spring-boot-maven-pluginartifactId>
             plugin>
         plugins>
     build>
 project>

打开springboot-dubbo-consume工程，在pom.xml中加入以下依赖，完整代码如下：

 <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>
     <groupId>com.chengligroupId>
     <artifactId>springboot-dubbo-consumeartifactId>
     <version>0.0.1-SNAPSHOTversion>
     <packaging>jarpackaging>
     <name>springboot-dubbo-consumename>
     <url>http://maven.apache.orgurl>
     <parent>
         <groupId>org.springframework.bootgroupId>
         <artifactId>spring-boot-starter-parentartifactId>
         <version>1.4.3.RELEASEversion>
     parent>
     <properties>
         <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
         <java.version>1.8java.version>
         <com.alibaba.dubbo.version>2.5.3com.alibaba.dubbo.version>
         <org.apache.zookeeper.version>3.4.6org.apache.zookeeper.version>
         <com.github.sgroschupf.zkclient.version>0.1com.github.sgroschupf.zkclient.version>
     properties>
     <dependencies>
         <dependency>
             <groupId>com.chengligroupId>
             <artifactId>springboot-dubbo-apiartifactId>
             <version>0.0.1-SNAPSHOTversion>
         dependency>
         <dependency>
             <groupId>org.springframework.bootgroupId>
             <artifactId>spring-boot-starter-webartifactId>
         dependency>

         <dependency>
             <groupId>com.alibabagroupId>
             <artifactId>dubboartifactId>
             <exclusions>
                 <exclusion>
                     <groupId>org.springframeworkgroupId>
                     <artifactId>springartifactId>
                 exclusion>
             exclusions>
             <version>${com.alibaba.dubbo.version}version>
         dependency>
         <dependency>
             <groupId>org.apache.zookeepergroupId>
             <artifactId>zookeeperartifactId>
             <version>${org.apache.zookeeper.version}version>
         dependency>
         <dependency>
             <groupId>com.github.sgroschupfgroupId>
             <artifactId>zkclientartifactId>
             <version>${com.github.sgroschupf.zkclient.version}version>
         dependency>
         <dependency>
             <groupId>org.springframework.bootgroupId>
             <artifactId>spring-boot-configuration-processorartifactId>
             <optional>trueoptional>
         dependency>
     dependencies>
     <build>
         <plugins>
             <plugin>
                 <groupId>org.springframework.bootgroupId>
                 <artifactId>spring-boot-maven-pluginartifactId>
             plugin>
         plugins>
     build>
 project>

2.Dubbo配置

2.1springboot-dubbo-provide服务提供者

      （1）在springboot-dubbo-provide项目中创建入口启动类MainConfig，完整代码如下：

 package com.chengli.springboot;

 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

 @SpringBootApplication
 public class MainConfig {
     public static void main(String[] args) {
         SpringApplication.run(MainConfig.class, args);
         try {
             System.in.read();
         } catch (Exception e) {
             e.printStackTrace();
         }
     }
 }

      （2）创建Dubbo配置类

 package com.chengli.springboot.dubbo;

 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportResource;
 import org.springframework.context.annotation.PropertySource;

 @Configuration
 @PropertySource("classpath:dubbo/dubbo.properties")
 @ImportResource({ "classpath:dubbo/*.xml" })
 public class DubboConfig {

 }

     （3）创建Dubbo配置文件

在src/main/resources下新建文件夹dubbo，并加入以下配置：

dubbo-provider.xml内容如下：

 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="${dubbo.application.name}" />





    <dubbo:registry protocol="${dubbo.registry.protocol}" address="${dubbo.registry.address}" />


     <dubbo:protocol name="${dubbo.protocol.name}" port="${dubbo.protocol.port}" />

     <dubbo:service interface="com.chengli.springboot.example.service.ExampleService"
         ref="exampleServiceImpl" retries="0" timeout="6000" />
 beans>

     注意：这里我发布的example服务是示例，具体的根据实际修改

    （4）创建dubbo.properties

 #应用名称
 dubbo.application.name=example-provider
 #注册中心类型
 dubbo.registry.protocol=zookeeper
 #注册中心地址
 dubbo.registry.address=127.0.0.1:2181
 #暴露服务方式
 dubbo.protocol.name=dubbo
 #暴露服务端口
 dubbo.protocol.port=20880

2.2springboot-dubbo-consume服务消费者

    （1）创建入口启动类MainConfig

 package com.chengli.springboot;

 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

 @SpringBootApplication
 public class MainConfig {
     public static void main(String[] args) {
         SpringApplication.run(MainConfig.class, args);
     }
 }

    （2）创建Dubbo配置类

 package com.chengli.springboot.dubbo;

 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportResource;
 import org.springframework.context.annotation.PropertySource;

 @Configuration
 @PropertySource("classpath:dubbo/dubbo.properties")
 @ImportResource({ "classpath:dubbo/*.xml" })
 public class DubboConfig {

 }

    （3）创建Dubbo配置文件

在src/main/resources下新建文件夹dubbo，并加入以下配置：

dubbo-consume.xml内容如下：

 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="${dubbo.application.name}" />


    <dubbo:registry protocol="${dubbo.registry.protocol}" address="${dubbo.registry.address}" />

     <dubbo:reference id="axempleService" interface="com.chengli.springboot.example.service.ExampleService" />
 beans>

    

    （4）创建dubbo.properties

 #应用名称
 dubbo.application.name=example-consume
 #注册中心类型
 dubbo.registry.protocol=zookeeper
 #注册中心地址
 dubbo.registry.address=127.0.0.1:2181

到这里基本上就已经可以了，不过测试类的代码我就不贴上来了。只要在API中定义接口实现即可。 使用Spring Boot 与Dubbo集成的时候，需要注意的是，不要使用Spring Boot提供的devtools热启动，因为devtools提供了两个ClassLoader，加载策略问题导致出现错误，无法启动。如果开发中需要热加载，那么使用Spring 提供的springloaded。

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