dubbo（开源分布式服务框架）-demo

其他 2018-11-22 13:45:55 阅读次数: 0

dubbo-demo-api  提供服务者和消费者都需要接口名和方法名才能调用

dubbo-demo-consumer  服务消费者（消费者）

dubbo-demo-provider 服务提供者（生产者）

dubbo-demo-parent maven父版本提供者

dubbo-demo-api项目

package com.java1234.service;

/**
 * 服务提供者接口
 * @author Administrator
 *
 */
public interface DemoProviderService {

	public String sayHello(String name);
}



pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.java1234</groupId>
  <artifactId>dubbo-demo-api</artifactId>
  <version>0.0.1-SNAPSHOT</version>
</project>

dubbo-demo-consumer（消费者）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!-- 消费方应用名称，用于计算依赖关系，不是匹配条件，不要与提供方名称一样  -->
    <dubbo:application name="demo-consumer"/>

    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>

    <!-- 生成远程服务代理，可以与本地bean一样使用  check属性，启动时候是否检查 一般设置成false 启动时候不检查 -->
    <dubbo:reference id="demoProviderService" check="false" interface="com.java1234.service.DemoProviderService"/>

</beans>
import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.java1234.service.DemoProviderService;

public class ConsumerTest {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"dubbo-demo-consumer.xml"});
        context.start();
        DemoProviderService demoProviderService=(DemoProviderService) context.getBean("demoProviderService");
        String result=demoProviderService.sayHello("你好");
        System.out.println("远程调用的结果："+result);
        try {
			System.in.read();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        context.close();
	}
}

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
  	<groupId>com.java1234</groupId>
	<artifactId>dubbo-demo-parent</artifactId>
	<version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>dubbo-demo-consumer</artifactId>
  
  <dependencies>
    <dependency>
		<groupId>com.java1234</groupId>
		<artifactId>dubbo-demo-api</artifactId>
	</dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>dubbo</artifactId>
    </dependency>
    <dependency>
        <groupId>com.101tec</groupId>
        <artifactId>zkclient</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-framework</artifactId>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
    </dependency>
    <dependency>
        <groupId>io.netty</groupId>
	        <artifactId>netty-all</artifactId>
	    </dependency>
	</dependencies>
</project>

dubbo-demo-provider 服务提供者（生产者）

package com.java1234.service.impl;

import com.java1234.service.DemoProviderService;

/**
 * 服务提供者接口实现类
 * @author Administrator
 *
 */
public class DemoProviderServiceImpl implements DemoProviderService{

	public String sayHello(String name) {
		return "服务001"+name;
	}

}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

	<!-- 提供方应用名称，用于计算依赖关系 -->
    <dubbo:application name="demo-provider" />
    
    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>
    
    <!-- 使用dubbo协议，在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880"/>
    
    <!-- service实现类作为本地的一个bean -->
    <bean id="demoProviderService" class="com.java1234.service.impl.DemoProviderServiceImpl"/>
    
    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.java1234.service.DemoProviderService" ref="demoProviderService"/>

</beans>
import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ProviderTest {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"dubbo-demo-provider.xml"});
        context.start();
        System.out.println("服务提供者向zookeeper注册中心注册服务成功（端口：20880）");
        try {
			System.in.read();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} // press any key to exit
        context.close();
	}
}

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
  	<groupId>com.java1234</groupId>
	<artifactId>dubbo-demo-parent</artifactId>
	<version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>dubbo-demo-provider</artifactId>
  
  <dependencies>
  		<dependency>
  			<groupId>com.java1234</groupId>
			<artifactId>dubbo-demo-api</artifactId>
  		</dependency>
	    <dependency>
	        <groupId>com.alibaba</groupId>
	        <artifactId>dubbo</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>com.101tec</groupId>
	        <artifactId>zkclient</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>org.apache.curator</groupId>
	        <artifactId>curator-framework</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>com.alibaba</groupId>
	        <artifactId>fastjson</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>log4j</groupId>
	        <artifactId>log4j</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>org.slf4j</groupId>
	        <artifactId>slf4j-api</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>org.apache.commons</groupId>
	        <artifactId>commons-lang3</artifactId>
	    </dependency>
	    <dependency>
	        <groupId>io.netty</groupId>
	        <artifactId>netty-all</artifactId>
	    </dependency>
	</dependencies>
</project>

dubbo-demo-parent

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.java1234</groupId>
  <artifactId>dubbo-demo-parent</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
 
  <!-- 依赖版本管理  -->
  <properties>
  	<dubbo-demo-api.version>0.0.1-SNAPSHOT</dubbo-demo-api.version>
  	<dubbo.version>2.6.0</dubbo.version>
    <zkclient.version>0.10</zkclient.version>
    <curator-framework.version>4.0.1</curator-framework.version>
    <fastjson.version>1.2.46</fastjson.version>
    <log4j.version>1.2.17</log4j.version>
    <slf4j-api.version>1.7.25</slf4j-api.version>
    <commons-lang3.version>3.4</commons-lang3.version>
    <netty-all.version>4.0.35.Final</netty-all.version>
  </properties>
 
  <!-- 依赖管理 仅仅定义 -->
  <dependencyManagement>
  	<dependencies>
	     <dependency>
              <groupId>com.java1234</groupId>
              <artifactId>dubbo-demo-api</artifactId>
              <version>${dubbo-demo-api.version}</version>
           </dependency>
          <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>dubbo</artifactId>
              <version>${dubbo.version}</version>
          </dependency>
          <dependency>
              <groupId>com.101tec</groupId>
              <artifactId>zkclient</artifactId>
              <version>${zkclient.version}</version>
          </dependency>
          <dependency>
              <groupId>org.apache.curator</groupId>
              <artifactId>curator-framework</artifactId>
              <version>${curator-framework.version}</version>
          </dependency>
          <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>fastjson</artifactId>
              <version>${fastjson.version}</version>
          </dependency>
          <dependency>
              <groupId>log4j</groupId>
              <artifactId>log4j</artifactId>
              <version>${log4j.version}</version>
          </dependency>
          <dependency>
              <groupId>org.slf4j</groupId>
              <artifactId>slf4j-api</artifactId>
              <version>${slf4j-api.version}</version>
          </dependency>
          <dependency>
              <groupId>org.apache.commons</groupId>
              <artifactId>commons-lang3</artifactId>
              <version>${commons-lang3.version}</version>
          </dependency>
          <dependency>
              <groupId>io.netty</groupId>
              <artifactId>netty-all</artifactId>
              <version>${netty-all.version}</version>
          </dependency>
	</dependencies>
  </dependencyManagement>
</project>

1.什么时候用到集群
并发量大
1.当单台服务器扛不住业务请求量的时候；
2.当业务需要7*24小时不间断服务的时候
dubbo的监控可以查看集群 权重 而且可以修改

dubbo集群只需要在

    <dubbo:protocol name="dubbo" port="20881"/>

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

多配置几个就可以了

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