dubbo入门-dubbo和spring整合

创建一个maven的工程dubbo-demo

工程结构.png

包含服务接口模块，服务接口模块：dubbo-demo-api，服务消费者模块：dubbo-demo-consumer，服务生产者模块：dubbo-demo-provider

1.服务接口模块：dubbo-demo-api

• 创建接口DemoService

  
  DemoService.png
• pom文件
  删除parent节点
  并创建artifactId，以对外提供依赖

    <groupId>com.imooc</groupId>
    <artifactId>dubbo-demo-api</artifactId>
    <version>1.0-SNAPSHOT</version>

2.服务生产者模块：dubbo-demo-provider

• 创建Provider启动类

package com.alibaba.dubbo.demo.provider;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Provider {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] {"dubbo-provider.xml"});
        context.start();
        System.in.read(); // press any key to exit
    }
}

• 创建DemoServiceImpl实现类

package com.alibaba.dubbo.demo.provider;
import com.alibaba.dubbo.demo.DemoService;
public class DemoServiceImpl implements DemoService {
    public String sayHello(String name) {
        return "Hello " + name;
    }
}

• Resources目录下创建dubbo-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://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">
    <dubbo:application name="demo-provider"/>
    <!--广播式-->
    <dubbo:registry address="multicast://224.5.6.7:1234"/>
    <dubbo:protocol name="dubbo" port="20880"/>
    <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService"/>
    <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl"/>
</beans>

• 添加依赖

    <dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.6.0</version>
        </dependency>
        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>dubbo-demo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

3.服务消费者模块：dubbo-demo-consumer

• 创建Consumer 启动类

import com.alibaba.dubbo.demo.DemoService;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Consumer {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                new String[]{"dubbo-consumer.xml"});
        context.start();
        DemoService demoService = (DemoService) context.getBean("demoService"); // obtain proxy object for remote invocation
        String hello = demoService.sayHello("fanfan"); // execute remote invocation
        System.out.println(hello); // show the result
    }
}

• 创建dubbo-consumer.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://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">
    <dubbo:application name="demo-consumer"/>
    <!--广播式-->
    <dubbo:registry address="multicast://224.5.6.7:1234"/>
    <dubbo:reference id="demoService" interface="com.alibaba.dubbo.demo.DemoService"/>
</beans>

启动生产者，启动消费者

控制台输出：Hello world

输出效果.png

本地调试还可采用直连的方式

dubbo-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://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">
    <dubbo:application name="demo-provider"/>
    <!--广播式-->
<!--
    <dubbo:registry address="multicast://224.5.6.7:1234"/>
-->
    <!--直连式-->
    <dubbo:registry register="false"/>
    <dubbo:protocol name="dubbo" port="20880"/>
    <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService"/>
    <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl"/>
</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"

dubbo-consumer.xml

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">
    <dubbo:application name="demo-consumer"/>
    <!--广播式-->
   <!-- <dubbo:registry address="multicast://224.5.6.7:1234"/>
    <dubbo:reference id="demoService" interface="com.alibaba.dubbo.demo.DemoService"/>-->
    <!--直连式-->
    <dubbo:reference id="demoService" interface="com.alibaba.dubbo.demo.DemoService" url="127.0.0.1:20880"/>
</beans>

参考https://juejin.im/post/5a37600b6fb9a0450671b86a