Hadoop RPC实战

本篇介绍Hadoop RPC一个客户端对服务端的远程调用

一 创建maven项目hadoop

二 配置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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>  <modelVersion>4.0.0</modelVersion>  <groupId>com.cakin</groupId>  <artifactId>hadoop</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>jar</packaging>  <name>hadoop</name>  <url>http://maven.apache.org</url>  <properties>    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  </properties>  <dependencies>       <dependency>           <groupId>jdk.tools</groupId>           <artifactId>jdk.tools</artifactId>           <version>1.7.0_51</version>           <scope>system</scope>          <systemPath>D:/Program/Java/jdk1.7.0_51/lib/tools.jar</systemPath>     </dependency>  <dependency>    <groupId>org.apache.hadoop</groupId>         <artifactId>hadoop-common</artifactId>         <version>2.7.4</version>     </dependency>     <dependency>         <groupId>org.apache.hadoop</groupId>         <artifactId>hadoop-hdfs</artifactId>         <version>2.7.4</version>     </dependency>     <dependency>         <groupId>org.apache.hadoop</groupId>         <artifactId>hadoop-mapreduce-client-common</artifactId>         <version>2.7.4</version>     </dependency>     <dependency>         <groupId>org.apache.hadoop</groupId>         <artifactId>hadoop-mapreduce-client-core</artifactId>         <version>2.7.4</version>     </dependency>     <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>3.8.1</version>      <scope>test</scope>    </dependency>  </dependencies></project>

三 创建RPCServer类

package com.cakin.hadoop;import java.io.IOException;import org.apache.hadoop.HadoopIllegalArgumentException;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.ipc.RPC;import org.apache.hadoop.ipc.RPC.Server;public class RPCServer implements IRPCInterface {     public static void main(String[] args) throws Exception{           Server server = new RPC.Builder(new Configuration())           .setBindAddress("localhost")           .setPort(8888)           .setInstance(new RPCServer())           .setProtocol(IRPCInterface.class)           .build();                      server.start();     }     public String test(String s) {           System.out.println("PRCServer.test()");           return "rpc" +s;     }}

四 创建IPRCInterface接口

package com.cakin.hadoop;public interface IRPCInterface {     public static final long versionID=1;     public String test(String s);}

五 创建PRCClient类

package com.cakin.hadoop;import java.io.IOException;importjava.net.InetSocketAddress;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.ipc.RPC;public class PRCClient {     public static void main(String[] args) throws Exception{           IRPCInterface proxy = RPC.getProxy(IRPCInterface.class, 1, new InetSocketAddress("localhost",8888),                     new Configuration());           String s= proxy.test("client");           System.out.println("clent=======>"+s);     }}

六 测试

1、启动服务端程序

2、启动客户端程序

3、客户端测试结果

clent=======>rpcclient

4、服务端测试结果

PRCServer.test()

七 参考

http://www.jikexueyuan.com/course/2710.html