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：

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<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>com.chengli</groupId>

<artifactId>springboot-dubbo-provide</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>jar</packaging>

<name>springboot-dubbo-provide</name>

<url>http://maven.apache.org</url>

<parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.4.3.RELEASE</version>

</parent>

<properties>

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

<java.version>1.8</java.version>

<com.alibaba.dubbo.version>2.5.3</com.alibaba.dubbo.version>

<org.apache.zookeeper.version>3.4.6</org.apache.zookeeper.version>

<com.github.sgroschupf.zkclient.version>0.1</com.github.sgroschupf.zkclient.version>

</properties>

<dependencies>

<dependency>

<groupId>com.chengli</groupId>

<artifactId>springboot-dubbo-api</artifactId>

<version>0.0.1-SNAPSHOT</version>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter</artifactId>

</dependency>

<!-- dubbo -->

<dependency>

<groupId>com.alibaba</groupId>

<artifactId>dubbo</artifactId>

<exclusions>

<exclusion>

<groupId>org.springframework</groupId>

<artifactId>spring</artifactId>

</exclusion>

</exclusions>

<version>${com.alibaba.dubbo.version}</version>

</dependency>

<dependency>

<groupId>org.apache.zookeeper</groupId>

<artifactId>zookeeper</artifactId>

<version>${org.apache.zookeeper.version}</version>

</dependency>

<dependency>

<groupId>com.github.sgroschupf</groupId>

<artifactId>zkclient</artifactId>

<version>${com.github.sgroschupf.zkclient.version}</version>

</dependency>

</dependencies>

<build>

<plugins>

<plugin>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</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：

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<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>com.chengli</groupId>

<artifactId>springboot-dubbo-consume</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>jar</packaging>

<name>springboot-dubbo-consume</name>

<url>http://maven.apache.org</url>

<parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.4.3.RELEASE</version>

</parent>

<properties>

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

<java.version>1.8</java.version>

<com.alibaba.dubbo.version>2.5.3</com.alibaba.dubbo.version>

<org.apache.zookeeper.version>3.4.6</org.apache.zookeeper.version>

<com.github.sgroschupf.zkclient.version>0.1</com.github.sgroschupf.zkclient.version>

</properties>

<dependencies>

<dependency>

<groupId>com.chengli</groupId>

<artifactId>springboot-dubbo-api</artifactId>

<version>0.0.1-SNAPSHOT</version>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

<!-- dubbo -->

<dependency>

<groupId>com.alibaba</groupId>

<artifactId>dubbo</artifactId>

<exclusions>

<exclusion>

<groupId>org.springframework</groupId>

<artifactId>spring</artifactId>

</exclusion>

</exclusions>

<version>${com.alibaba.dubbo.version}</version>

</dependency>

<dependency>

<groupId>org.apache.zookeeper</groupId>

<artifactId>zookeeper</artifactId>

<version>${org.apache.zookeeper.version}</version>

</dependency>

<dependency>

<groupId>com.github.sgroschupf</groupId>

<artifactId>zkclient</artifactId>

<version>${com.github.sgroschupf.zkclient.version}</version>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-configuration-processor</artifactId>

<optional>true</optional>

</dependency>

</dependencies>

<build>

<plugins>

<plugin>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</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：

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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

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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：

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

<!-- 注册中心暴露服务地址 -->

<!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->

<!-- <dubbo:registry protocol="zookeeper" address="10.170.219.98:2181,10.173.55.173:2181" /> -->

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

<!-- 暴露服务 -->

<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

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#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

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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

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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：

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

<!-- 注册中心暴露服务地址 -->

<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

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#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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