XML 組態

使用 Spring XML 開發 Dubbo 應用程式

Dubbo 擁有基於 Spring Schema 擴展的自定義配置組件，使用 XML 可以實現的配置能力通常等同於配置參考手冊。

有關以下內容的完整範例，請參閱 dubbo-samples

服務提供者

定義服務介面

DemoService.java

package org.apache.dubbo.demo;

public interface DemoService {
    String sayHello(String name);
}

在服務提供者端實現介面

DemoServiceImpl.java

package org.apache.dubbo.demo.provider;
import org.apache.dubbo.demo.DemoService;

public class DemoServiceImpl implements DemoService {
    public String sayHello(String name) {
        return "Hello " + name;
    }
}

使用 Spring 配置宣告暴露服務

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="https://dubbo.dev.org.tw/schema/dubbo"
       xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       https://dubbo.dev.org.tw/schema/dubbo https://dubbo.dev.org.tw/schema/dubbo/dubbo.xsd http://www.springframework.org/schema/context http://www.springframework .org/schema/context/spring-context.xsd">
    <context:property-placeholder/>

    <dubbo:application name="demo-provider"/>

    <dubbo:registry address="zookeeper://${zookeeper.address:127.0.0.1}:2181"/>

    <dubbo:provider token="true"/>

    <bean id="demoService" class="org.apache.dubbo.samples.basic.impl.DemoServiceImpl"/>

    <dubbo:service interface="org.apache.dubbo.samples.basic.api.DemoService" ref="demoService"/>

</beans>

載入 Spring 配置

public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
        System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new Date()) + "] Hello " + name +
                ", request from consumer: " + RpcContext. getContext(). getRemoteAddress());
        return "Hello " + name + ", response from provider: " + RpcContext.getContext().getLocalAddress();
    }
}

服務消費者

透過 Spring 配置引用遠端服務

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="https://dubbo.dev.org.tw/schema/dubbo"
       xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       https://dubbo.dev.org.tw/schema/dubbo https://dubbo.dev.org.tw/schema/dubbo/dubbo.xsd http://www.springframework.org/schema/context http://www.springframework .org/schema/context/spring-context.xsd">
    <context:property-placeholder/>

    <dubbo:application name="demo-consumer"/>

    <dubbo:registry address="zookeeper://${zookeeper.address:127.0.0.1}:2181"/>

    <dubbo:reference id="demoService" check="true" interface="org.apache.dubbo.samples.basic.api.DemoService"/>

</beans>

載入 Spring 配置並呼叫遠端服務

public class BasicConsumer {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring/dubbo-demo-consumer.xml");
        context. start();
        DemoService demoService = (DemoService) context. getBean("demoService");
        String hello = demoService.sayHello("world");
        System.out.println(hello);
    }
}

上次修改時間：2023 年 11 月 14 日：修復損壞的連結 (#2863) (da40888aa5c)