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>原文鏈接地址:『高級篇』docker之課程管理dubbo入門操練(14)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。 源碼:https://github.com/limingios/dubbo.git
dubbo 介紹
- 官網 http://dubbo.apache.org/zh-cn/
高性能的基於java的,RPC框架。dubbo是阿里巴巴開源的一個項目,就像大多的RPC框架,dubbo的思想圍繞一個服務,指定一個方法的參數和返回值,這個方法可以被遠程調用的,在服務端,會實現這個接口,會運行dubbo的服務用來處理客戶端的調用,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:首先要定義一個接口,這個接口在服務端和客戶端公用,服務端會完成這個接口的實現,客戶端通過接口的描述來調用服務端。
快速入門講解 spring 版本,
- 根據官網來創建
- 創建三個api,provider,consumer 三個項目
-
用了本地調用。
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/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd"> <!-- 提供方應用信息,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端口暴露服務 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 聲明需要暴露的服務接口 --> <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模塊)
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模塊)
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接口
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配置文件 - application.properties
spring.dubbo.application.name=demo-provider
#這裏使用廣播的註冊方式,
#如果有Can't assign address異常需要加vm參數:
#-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. 啓動類
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模塊)
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配置文件 - application.properties
server.port=8080
#dubbo config
spring.dubbo.application.name=demo-consumer
#這裏使用廣播的註冊方式,
#如果有Can't assign address異常需要加vm參數:
#-Djava.net.preferIPv4Stack=true
spring.dubbo.registry.address=multicast://224.5.6.7:1234
spring.dubbo.scan=com.idig8.springboot.dubbo.demo.consumer
4. 啓動類
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的入門也就到這裏,從spring 和springboot 對dubbo的整合。
流程基本之前也說,api 建立接口,provider 實現接口, consumer 調用接口。