一个简单的Dubbo示例

2-15 后端 magicwt 3,632 views

一个简单的Dubbo示例

2-15 3,632 views

定义服务接口及其实现

服务接口TestService：

package com.magicwt.service;

public interface TestService {

    public String greet(String name);

}

package com.magicwt.service;

public interface TestService {

public String greet(String name);

}

服务实现TestServiceImpl：

package com.magicwt.service.impl;

import com.magicwt.service.TestService;

public class TestServiceImpl implements TestService {

    @Override
    public String greet(String name) {
        return "hi, " + name;
    }

}

package com.magicwt.service.impl;

import com.magicwt.service.TestService;

public class TestServiceImpl implements TestService {

@Override

public String greet(String name) {

return "hi, " + name;

}

服务提供者

服务提供者TestProvider：

package com.magicwt;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestProvider {

    public static void main(String[] args) throws Exception {
        // 加载Spring上下文环境
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("provider.xml");
        // 保持进程，等待输入
        System.in.read();
    }
}

package com.magicwt;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestProvider {

public static void main(String[] args) throws Exception {

// 加载Spring上下文环境

ApplicationContext applicationContext = new ClassPathXmlApplicationContext("provider.xml");

// 保持进程，等待输入

System.in.read();

}

服务提供者Spring上下文配置：

<?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-3.2.xsd
    http://code.alibabatech.com/schema/dubbo
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
    <!-- 配置应用名称，用于表示服务提供者和服务消费者之间的依赖关系 -->
    <dubbo:application name="test-provider"  />

    <!-- 配置Zookeeper注册中心 -->
    <dubbo:registry address="zookeeper://xxx.xxx.xxx.xxx:2181" />

    <!-- 配置服务通信协议，采用dubbo协议 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!-- 配置本地服务实例 -->
    <bean id="testService" class="com.magicwt.service.impl.TestServiceImpl"/>

    <!-- 通过Dubbo将本地服务暴露为远程服务 -->
    <dubbo:service interface="com.magicwt.service.TestService" ref="testService" />

</beans>

<?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-3.2.xsd

http://code.alibabatech.com/schema/dubbo

http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

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

<dubbo:registry address="zookeeper://xxx.xxx.xxx.xxx:2181" />

<dubbo:protocol name="dubbo" port="20880" />

<dubbo:service interface="com.magicwt.service.TestService" ref="testService" />

</beans>

服务消费者

服务消费者TestConsumer：

package com.magicwt;

import com.magicwt.service.TestService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestConsumer {

    public static void main(String[] args) throws Exception {
        // 加载Spring上下文环境
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");
        // 从Spring上下文环境获取服务实例
        TestService testService = (TestService) applicationContext.getBean("testService");
        int count = 0;
        while(true) {
            // 每隔2秒调用一次服务方法
            System.out.println(testService.greet("admin" + ++count));
            Thread.sleep(2000);
        }
    }

}

package com.magicwt;

import com.magicwt.service.TestService;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestConsumer {

public static void main(String[] args) throws Exception {

// 加载Spring上下文环境

ApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");

// 从Spring上下文环境获取服务实例

TestService testService = (TestService) applicationContext.getBean("testService");

int count = 0;

while(true) {

// 每隔2秒调用一次服务方法

System.out.println(testService.greet("admin" + ++count));

Thread.sleep(2000);

}

服务消费者Spring上下文配置：

<?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-3.2.xsd
    http://code.alibabatech.com/schema/dubbo
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!-- 配置应用名称，用于表示服务提供者和服务消费者之间的依赖关系 -->
    <dubbo:application name="test-consumer"  />

    <!-- 配置Zookeeper注册中心 -->
    <dubbo:registry address="zookeeper://xxx.xxx.xxx.xxx:2181" />

    <!-- 引用通过Dubbo暴露的远程服务 -->
    <dubbo:reference id="testService" interface="com.magicwt.service.TestService" />

</beans>

<?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-3.2.xsd

http://code.alibabatech.com/schema/dubbo

http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

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

<dubbo:registry address="zookeeper://xxx.xxx.xxx.xxx:2181" />

<dubbo:reference id="testService" interface="com.magicwt.service.TestService" />

</beans>

运行

分别启动服务提供者和服务消费者，服务消费者输出如下：

从监控中心可以看出，应用“test-provider”是服务提供者，应用“test-consumer”是服务消费者，因为“test-consumer”调用“test-provider”提供的服务，所以“test-consumer”依赖于“test-provider”。

版权属于: 我爱我家

原文地址: http://magicwt.com/2016/02/15/%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84dubbo%e7%a4%ba%e4%be%8b/

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