dubbo学习之Hello world

        现在企业中使用dubbo的越来越多，今天就简单的学习一下dubbo，写了一个hello world，教程仅供入门，如要深入学习请上官网

 

 

服务提供方：

       首先将提供方和消费方都引入jar包，如果使用的是maven管理项目，可以直接加入dubbo的配置

<!—dubbo start -->

<dependency> 
    <groupId>com.alibaba</groupId> 
    <artifactId>dubbo</artifactId> 
    <version>2.5.3</version> 
    <exclusions> 
        <exclusion> 
            <groupId>org.springframework</groupId> 
            <artifactId>spring</artifactId> 
        </exclusion> 
    </exclusions> 
</dependency>

<!—dubbo end  -->

<!-- zookeeper start --> 
<dependency> 
    <groupId>org.apache.zookeeper</groupId> 
    <artifactId>zookeeper</artifactId> 
    <version></version> 
</dependency> 
<dependency> 
    <groupId>com.101tec</groupId> 
    <artifactId>zkclient</artifactId> 
    <version>${zkclient_version}</version> 
</dependency> 
<!-- zookeeper end –>

声明接口：

public interface UserInfoService { 
     
    String sayHello(String name);

}

实现接口：

public class UserInfoServiceImpl implements UserInfoService{

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

}

配置applicationContext.xml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://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd 
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <dubbo:application name="hello-world-app"/> 
    <!-- 注册地址 --> 
    <dubbo:registry address="zookeeper://192.168.0.123:2181" ></dubbo:registry> 
    
    <dubbo:protocol name="dubbo" port="20880"></dubbo:protocol> 
    
    <dubbo:service ref="userInfoService" interface="com.zhiyi.service.UserInfoService" /> 
    <!-- designate implementation --> 
    <bean id="userInfoService" class="com.zhiyi.service.impl.UserInfoServiceImpl" />

</beans> 

 

程序启动入口：

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.google.common.util.concurrent.AbstractIdleService;

public class BootStart extends AbstractIdleService{

    ClassPathXmlApplicationContext context = null; 
    
    public static void main(String[] args) { 
        BootStart bootStart = new BootStart(); 
        bootStart.startAsync(); 
        try { 
            Object lock = new Object(); 
            synchronized (lock) { 
                while(true){ 
                    lock.wait(); 
                } 
            } 
        } catch (Exception e) { 
            e.printStackTrace(); 
        }

    } 
    
    @Override 
    protected void shutDown() throws Exception { 
        if( context != null){ 
            context.stop(); 
        } 
    }

    @Override 
    protected void startUp() throws Exception { 
        String configure = "applicationContext.xml"; 
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(configure); 
        
        String[] beans = context.getBeanDefinitionNames(); 
        
        for( String bean : beans){ 
            System.out.println("beanName:"+bean); 
        } 
        context.start(); 
        context.registerShutdownHook(); 
        System.out.println("provider is start!"); 
        
    } 
}

服务消费方：

配置applicationContext.xml

注意：在消费方需要引入接口

<?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://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd 
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <dubbo:application name="consumer-of-hello-world"/>

    <dubbo:registry address="zookeeper://192.168.0.123:2181"></dubbo:registry>

    <dubbo:reference id="userInfoService" interface="com.zhiyi.service.UserInfoService"></dubbo:reference> 
   

</beans> 

 

服务消费方入口：

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

import com.zhiyi.service.UserInfoService;

public class BootStart {

    public static void main(String[] args) { 
        BootStart bootStart = new BootStart(); 
        bootStart.start(); 
    } 
    
    public void start(){ 
        String applicationConfig = "applicationContext.xml"; 
        ApplicationContext context = new ClassPathXmlApplicationContext(applicationConfig); 
        String[] beans = context.getBeanDefinitionNames(); 
        for(String bean : beans){ 
            System.out.println("beanName:"+bean); 
        } 
        
        UserInfoService userInfoService = (UserInfoService) context.getBean("userInfoService"); 
        System.out.println(userInfoService.sayHello("zhangsan")); 
    } 
}

好了，就是这么简单，dubbo的hello world就完成了，欢迎大神拍砖～