隨着互聯網的發展,網站應用的規模不斷擴大,常規的垂直應用架構已無法應對,分佈式服務架構以及流動計算架構勢在必行,亟需一個治理系統確保架構有條不紊的演進,Dubbo應運而生。
架構
上圖爲dubbo結合註冊中心的架構(也有單點模式),服務提供方(Provider)將所有的服務註冊到註冊中心(Registry),服務消費方(Consumer)通過訪問註冊中心取得可用的服務列表,然後調用服務。
後臺管理部署
源碼下載
https://github.com/alibaba/dubbo
控制檯部署
Dubbo是一個多模塊的maven項目,其中dubbo-admin是控制檯。
- 修改dubbo-admin模塊下的dubbo.properties的配置,如
dubbo.registry.address=zookeeper://xxx.xxx.xxx.xxx:2181;zookeeper://xxx.xxx.xxx.xxx:2182;zookeeper://xxx.xxx.xxx.xxx:2183
dubbo.admin.root.password=root
dubbo.admin.guest.password=guest
- 部署到web容器,啓動即可
實現簡單dubbo服務
分別建立三個模塊
<modules>
<module>dubbo-api</module>
<module>dubbo-provider</module>
<module>dubbo-consumer</module>
</modules>
dubbo-api
- 定義接口
public interface IHelloWorldService {
public String sayHello(String name);
}
- pom配置
<artifactId>dubbo-api</artifactId>
dubbo-provider
- pom配置
<dependencies>
<dependency>
<groupId>com.bdong</groupId>
<artifactId>dubbo-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<!-- http://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
- 實現接口
public class HelloWorldServiceImpl implements IHelloWorldService {
public String sayHello(String name) {
return "Hello World : "+ name;
}
}
- 配置文件
<?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">
<!--服務提供者名稱-->
<dubbo:application name="hello-world-provider"/>
<!--註冊中心-->
<dubbo:registry address="xxx.xxx.xxx.xxx:2181" protocol="zookeeper"/>
<!--<!–不使用註冊中心–>-->
<!--<dubbo:registry address="N/A"/>-->
<!--協議-->
<dubbo:protocol name="dubbo" port="20881"/>
<!--發佈服務-->
<dubbo:service interface="com.bdong.dubbo.api.IHelloWorldService" ref="demoService" protocol="dubbo"/>
<bean id="demoService" class="com.bdong.dubbo.provider.HelloWorldServiceImpl"/>
</beans>
- 啓動服務
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"provider.xml"});
context.start();
//保持服務可用
System.in.read();
}
dubbo-consumer
- pom配置同dubbo-provider
- 配置文件
<!--服務消費者名稱-->
<dubbo:application name="hello-world-provider"/>
<!--註冊中心-->
<dubbo:registry address="xxx.xxx.xxx.xxx:2181" protocol="zookeeper"/>
<!--<!–不使用註冊中心–>-->
<!--<dubbo:registry address="N/A"/>-->
<!--協議-->
<dubbo:protocol name="dubbo" port="20881"/>
<!--引用服務-->
<dubbo:reference interface="com.bdong.dubbo.api.IHelloWorldService" id="demoService" protocol="dubbo"/>
- 調用
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"consumer.xml"});
IHelloWorldService helloWorldService = (IHelloWorldService) context.getBean("demoService");
System.out.println(helloWorldService.sayHello("man!"));
}
- 結果
Hello World : man!