基礎篇--簡單的Dubbo提供者provider與消費者consumer

一、提供方Provider

1.接口

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public interface DemoService {

    String sayHello(String name);

    public List getUsers();

}

2.實現類

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public class DemoServiceImpl implements DemoService {

    public String sayHello(String name) {
        return "Hello " + name;
    }

    public List getUsers() {
        List list = new ArrayList();
        User u1 = new User();
        u1.setName("jack");
        u1.setAge(20);
        u1.setSex("m");

        User u2 = new User();
        u2.setName("tom");
        u2.setAge(21);
        u2.setSex("m");

        User u3 = new User();
        u3.setName("rose");
        u3.setAge(19);
        u3.setSex("w");

        list.add(u1);
        list.add(u2);
        list.add(u3);
        return list;
    }
}

3.model類

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/**
 * 實現序列化
 * @author Administrator
 *
 */
public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    private int age;
    private String name;
    private String sex;

    public User() {
        super();
    }

    public User(int age, String name, String sex) {
        super();
        this.age = age;
        this.name = name;
        this.sex = sex;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

}

4.applicationContenxt.xml配置

注意：提供方需要指定端口，不同提供方需要使用不同端口，不然會有端口衝突，使用的端口需要在防火牆iptables中配置允許通過

消費方不用指定端口

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<?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
        ">

    <!-- 提供方應用信息，用於計算依賴關係 -->
    <dubbo:application name="demo_provider" />

    <!-- 使用zookeeper註冊中心暴露服務地址 -->
    <dubbo:registry address="zookeeper://192.168.1.121:2181" />

    <!-- 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.unj.dubbotest.provider.DemoService"
        ref="demoService" />


    <!-- 具體的實現bean,用來注入-->
    <bean id="demoService" class="com.unj.dubbotest.provider.impl.DemoServiceImpl" />

</beans>

5.提供方Provider測試方法

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public class Provider {

    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] { "applicationContext.xml" });
        context.start();
        System.in.read(); // 爲保證服務一直開着，利用輸入流的阻塞來模擬
    }
}

運行結果:

6.在Dubbo管理控制檯上查看發佈的提供方

二、消費方Consume

1.引用提供方的接口

2.消費方applictionContenxt.xml配置

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<?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
        ">

    <!-- 消費方應用名，用於計算依賴關係，不是匹配條件，不要與提供方一樣 -->
    <dubbo:application name="hehe_consumer" />

    <!-- 使用zookeeper註冊中心暴露服務地址 -->
    <dubbo:registry address="zookeeper://192.168.1.121:2181" />

    <!-- 生成遠程服務代理，可以像使用本地bean一樣使用demoService -->
    <dubbo:reference id="demoService"
        interface="com.unj.dubbotest.provider.DemoService" />

</beans>

3.消費方調用提供方

[java] view plain copy 

public class Consumer {

    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] { "applicationContext.xml" });
        context.start();

        DemoService demoService = (DemoService) context.getBean("demoService");
        String hello = demoService.sayHello("tom");
        System.out.println(hello);

        List list = demoService.getUsers();
        if (list != null && list.size() > 0) {
            for (int i = 0; i < list.size(); i++) {
                System.out.println(list.get(i));
            }
        }
        System.in.read();
    }

}

控制檯信息輸出

dubbo管理控制檯查看