Spring Boot 集成Dubbo框架实例
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>4.0.0</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>${com.github.sgroschupf.zkclient.version}</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
打开springboot-dubbo-consume工程,在pom.xml中加入以下依赖,完整代码如下:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.chengli</groupId> <artifactId>springboot-dubbo-consume</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springboot-dubbo-consume</name> <url>http://maven.apache.org</url> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.3.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> <com.alibaba.dubbo.version>2.5.3</com.alibaba.dubbo.version> <org.apache.zookeeper.version>3.4.6</org.apache.zookeeper.version> <com.github.sgroschupf.zkclient.version>0.1</com.github.sgroschupf.zkclient.version> </properties> <dependencies> <dependency> <groupId>com.chengli</groupId> <artifactId>springboot-dubbo-api</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- dubbo --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> </exclusion> </exclusions> <version>${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:
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"> <!-- 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="${dubbo.protocol.port}" /> <dubbo:service interface="com.chengli.springboot.example.service.ExampleService" ref="exampleServiceImpl" retries="0" timeout="6000" /> </beans>
注意:这里我发布的example服务是示例,具体的根据实际修改
(4)创建dubbo.properties
#应用名称 dubbo.application.name=example-provider #注册中心类型 dubbo.registry.protocol=zookeeper #注册中心地址 dubbo.registry.address=127.0.0.1:2181 #暴露服务方式 dubbo.protocol.name=dubbo #暴露服务端口 dubbo.protocol.port=20880
2.2springboot-dubbo-consume服务消费者
(1)创建入口启动类MainConfig
package com.chengli.springboot; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class MainConfig { public static void main(String[] args) { SpringApplication.run(MainConfig.class, args); } }
(2)创建Dubbo配置类
package com.chengli.springboot.dubbo; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.ImportResource; import org.springframework.context.annotation.PropertySource; @Configuration @PropertySource("classpath:dubbo/dubbo.properties") @ImportResource({ "classpath:dubbo/*.xml" }) public class DubboConfig { }
(3)创建Dubbo配置文件
在src/main/resources下新建文件夹dubbo,并加入以下配置:
dubbo-consume.xml内容如下:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息,用于计算依赖关系 --> <dubbo:application name="${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
#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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