『高階篇』docker之課程管理dubbo入門操練(13)
接下來我們即將開始說課程管理,課程服務他是基於dubbo實現的,所以先來預熱下,dubbo,對不熟悉的dubbo的老鐵進行一下講解。 原始碼:https://github.com/limingios/dubbo.git
dubbo 介紹
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官網 http://dubbo.apache.org/zh-cn/
>高效能的基於java的,RPC框架。dubbo是阿里巴巴開源的一個專案,就像大多的RPC框架,dubbo的思想圍繞一個服務,指定一個方法的引數和返回值,這個方法可以被遠端呼叫的,在服務端,會實現這個介面,會執行dubbo的服務用來處理客戶端的呼叫,在客戶端,會有一個存根它提供和服務端想通的方法。其實這些概念用java的術語:首先要定義一個介面,這個介面在服務端和客戶端公用,服務端會完成這個介面的實現,客戶端通過介面的描述來呼叫服務端。
快速入門講解 spring 版本,
- 根據官網來建立
- 建立三個api,provider,consumer 三個專案
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用了本地呼叫。
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://dubbo.apache.org/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsdhttp://dubbo.apache.org/schema/dubbohttp://dubbo.apache.org/schema/dubbo/dubbo.xsd"> <!-- 提供方應用資訊,用於計算依賴關係 --> <dubbo:application name="demo-provider"/> <!-- 使用multicast廣播註冊中心暴露服務地址 --> <dubbo:registry register="false" /> <!-- 用dubbo協議在20880埠暴露服務 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 宣告需要暴露的服務介面 --> <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService" /> <!-- 和本地bean一樣實現服務 --> <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl" /> </beans>
consumer.xml
<?xml version="1.0" encoding="UTF-8"?> <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-demo</artifactId> <groupId>com.idig8</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubbo-demo-consumer</artifactId> <dependencies> <dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.4</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.0.RELEASE</version> </dependency> </dependencies> </project>
快速入門講解springboot版本
SpringBoot整合dubbo示例
一、定義API(API模組)
1. 定義api
package com.idig8.springboot.dubbo.demo; public interface DemoService { String sayHello(String name); }
2. install到本地
對外提供的maven座標如下:
<dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency>
二、服務提供者(provider模組)
1. 增加maven依賴
<!-- springboot parent --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version> </parent> <!-- springboot dubbo starter --> <dependency> <groupId>io.dubbo.springboot</groupId> <artifactId>spring-boot-starter-dubbo</artifactId> <version>1.0.0</version> </dependency> <!-- api dependence --> <dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency>
2. 實現API介面
package com.idig8.springboot.dubbo.demo.provider; import com.alibaba.dubbo.config.annotation.Service; import com.idig8.springboot.dubbo.demo.DemoService; @Service public class DemoServiceImpl implements DemoService { public String sayHello(String name) { return "Hello, " + name + " (from Spring Boot)"; } }
3. springboot配置檔案 – application.properties
spring.dubbo.application.name=demo-provider #這裡使用廣播的註冊方式, #如果有Can't assign address異常需要加vm引數: #-Djava.net.preferIPv4Stack=true spring.dubbo.registry.address=multicast://224.5.6.7:1234 spring.dubbo.protocol.name=dubbo spring.dubbo.protocol.port=20880 spring.dubbo.scan=com.idig8.springboot.dubbo.demo.provider
4. 啟動類
package com.idig8.springboot.dubbo.demo.provider; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class MainProvider { public static void main(String[] args) { SpringApplication.run(MainProvider.class,args); } }
三、服務消費者(consumer模組)
1. 增加maven依賴
<!-- springboot parent --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version> </parent> <!-- springboot web starter --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- springboot dubbo starter --> <dependency> <groupId>io.dubbo.springboot</groupId> <artifactId>spring-boot-starter-dubbo</artifactId> <version>1.0.0</version> </dependency> <!-- api dependency --> <dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency>
2. 實現controller
package com.idig8.springboot.dubbo.demo.consumer; import com.alibaba.dubbo.config.annotation.Reference; import com.idig8.springboot.dubbo.demo.DemoService; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class DemoConsumerController { @Reference private DemoService demoService; @RequestMapping("/sayHello") public String sayHello(@RequestParam String name) { return demoService.sayHello(name); } }
3. springboot配置檔案 – application.properties
server.port=8080 #dubbo config spring.dubbo.application.name=demo-consumer #這裡使用廣播的註冊方式, #如果有Can't assign address異常需要加vm引數: #-Djava.net.preferIPv4Stack=true spring.dubbo.registry.address=multicast://224.5.6.7:1234 spring.dubbo.scan=com.idig8.springboot.dubbo.demo.consumer
4. 啟動類
package com.idig8.springboot.dubbo.demo.consumer; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class Main { public static void main(String[] args) { SpringApplication.run(Main.class,args); } }
PS:dubbo的入門也就到這裡,從spring 和springboot 對dubbo的整合。
流程基本之前也說,api 建立介面,provider 實現介面, consumer 呼叫介面。
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