分布式服务dubbo使用

SOA 服务框架dubbo

节点角色说明：
Provider: 暴露服务的服务提供方。
Consumer: 调用远程服务的服务消费方。
Registry: 服务注册与发现的注册中心。
Monitor: 统计服务的调用次调和调用时间的监控中心。
Container: 服务运行容器

远程生产者

至于dubbo的详细介绍网上不少，此次主要是简单测试。
远程接口

package com.tony.dubbo.service;

public interface CustomerService {
    public String getName();
}

远程接口实现方法

package com.tony.dubbo.service;

public class CustomerServiceImpl implements CustomerService {
    public String getName() {
        System.out.println("remote method~~~~");
        return "CustomerServiceImpl=====>getName";
    }
}

**远程dobbo的接口dubbo-provide.xmll文件

由于要用到zookeeper，至于zookeeper的安装能够参考上篇博文

<?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 ">
    <!-- 提供方应用名称信息，这个至关于起一个名字，咱们dubbo管理页面比较清晰是哪一个应用暴露出来的 -->
    <dubbo:application name="dubbo_provider"></dubbo:application>
    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://192.168.163.33:2181"></dubbo:registry>
    <dubbo:protocol name="dubbo" port="20880" />
    <!-- 具体的实现bean -->
    <bean id="demoService" class="com.tony.dubbo.service.CustomerServiceImpl" />
    <!-- 声明须要暴露的服务接口 -->
    <dubbo:service interface="com.tony.dubbo.service.CustomerService" ref="demoService" />

</beans>

DemoProvider.java

package com.tony.dubbo.service;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class DemoProvider {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:META-INF/spring/*.xml");
        context.start();
        System.out.println("run DemoProvider...");
        System.in.read();
    }
}

Maven依赖配置

<dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.5.0-alpha</version>
        </dependency>

        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
    </dependencies>

简单工程

以上是远程的的方法，咱们要把远程的接口方法打成jar。提供给消费者使用。

消费者方法

package com.tony.dubbo.serviceImpl;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.tony.dubbo.service.CustomerService;

public class DemoConsumer {
    public static void main(String[] args) {

        // Consumer
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:META-INF/spring/*.xml");
        context.start();
        CustomerService userService = (CustomerService) context.getBean("demoService");
        System.out.println(userService.getName());
    }
}

dubbo-consumer.xml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:jee="http://www.springframework.org/schema/jee"  
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    xmlns:context="http://www.springframework.org/schema/context"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd  
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd  
    http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"  
    default-lazy-init="false" >  
  
<!--    <dubbo:application name="dubbo_consumer"></dubbo:application>   -->
   <!-- 使用zookeeper注册中心暴露服务地址 -->    
   <dubbo:registry address="zookeeper://192.168.163.33:2181" check="false"></dubbo:registry>   
     <!-- 要引用的服务 -->    
   <dubbo:reference interface="com.tony.dubbo.service.CustomerService" id="demoService"></dubbo:reference>  
</beans>

Maven依赖 pom.xml配置

<dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.5.0-alpha</version>
        </dependency>

        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <dependency>
            <groupId>com.tony</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>

消费者工程

运行结果

• 首先运行远程生产方法
  
• 运行消费服务方法
  
• 能够进入linux中查看zookeeper的链接状态，发现 dubbo
  

以上是基于dubbo 2.5.3 版本，zookeeper的3.5.0-alpha版本测试，开始测试过程用的zookeeper其余版本测试发现有些依赖jar不全。

进过测试发现基于SOA，能够调用到远程的方法。固然能够debug远程的方法就和本地调试同样。

固然咱们dobbo也有monitor监控中心，能够详细看到如今启动的服务，有哪些机器正在调用等等。