paulwong

Windows環境下用ECLIPSE提交MAPREDUCE JOB至遠程HBASE中運行

1. 假設遠程HADOOP主機名為ubuntu，則應在hosts文件中加上192.168.58.130       ubuntu
   
   
   
2. 新建MAVEN項目，加上相應的配置
   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/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
   
     <groupId>com.cloudputing</groupId>
     <artifactId>bigdata</artifactId>
     <version>1.0</version>
     <packaging>jar</packaging>
   
     <name>bigdata</name>
     <url>http://maven.apache.org</url>
   
     <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
   
       <dependencies>
           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>3.8.1</version>
               <scope>test</scope>
           </dependency>
           <dependency>
               <groupId>org.springframework.data</groupId>
               <artifactId>spring-data-hadoop</artifactId>
               <version>0.9.0.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.apache.hbase</groupId>
               <artifactId>hbase</artifactId>
               <version>0.94.1</version>
           </dependency>
           
           <!-- <dependency>
               <groupId>org.apache.hbase</groupId>
               <artifactId>hbase</artifactId>
               <version>0.90.2</version>
           </dependency> -->
           <dependency>
               <groupId>org.apache.hadoop</groupId>
               <artifactId>hadoop-core</artifactId>
               <version>1.0.3</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-test</artifactId>
               <version>3.0.5.RELEASE</version>
           </dependency>
       </dependencies>
   </project>



3. hbase-site.xml
   

   <?xml version="1.0"?>
   <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
   <!--
   /**
    * Copyright 2010 The Apache Software Foundation
    *
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    */
   -->
   <configuration>
   
       <property>
           <name>hbase.rootdir</name>
           <value>hdfs://ubuntu:9000/hbase</value>
       </property>
   
       <!-- 在構造JOB時，會新建一文件夾來準備所需文件。
              如果這一段沒寫，則默認本地環境為LINUX，將用LINUX命令去實施，在WINDOWS環境下會出錯 -->
       <property>
           <name>mapred.job.tracker</name>
           <value>ubuntu:9001</value>
       </property>
       
       <property>
           <name>hbase.cluster.distributed</name>
           <value>true</value>
       </property>
       
       <!-- 此處會向ZOOKEEPER咨詢JOB TRACKER的可用IP -->
       <property>
           <name>hbase.zookeeper.quorum</name>
           <value>ubuntu</value>
       </property>
       <property skipInDoc="true">
           <name>hbase.defaults.for.version</name>
           <value>0.94.1</value>
       </property>
   
   </configuration>



4. 測試文件：MapreduceTest.java
   
   package com.cloudputing.mapreduce;
   
   import java.io.IOException;
   
   import junit.framework.TestCase;
   
   public class MapreduceTest extends TestCase{
       
       public void testReadJob() throws IOException, InterruptedException, ClassNotFoundException
       {
           MapreduceRead.read();
       }
   
   }



5. MapreduceRead.java
   package com.cloudputing.mapreduce;
   
   import java.io.IOException;
   
   import org.apache.hadoop.conf.Configuration;
   import org.apache.hadoop.fs.FileSystem;
   import org.apache.hadoop.fs.Path;
   import org.apache.hadoop.hbase.HBaseConfiguration;
   import org.apache.hadoop.hbase.client.Result;
   import org.apache.hadoop.hbase.client.Scan;
   import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
   import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;
   import org.apache.hadoop.hbase.mapreduce.TableMapper;
   import org.apache.hadoop.hbase.util.Bytes;
   import org.apache.hadoop.io.Text;
   import org.apache.hadoop.mapreduce.Job;
   import org.apache.hadoop.mapreduce.lib.output.NullOutputFormat;
   
   public class MapreduceRead {
       
       public static void read() throws IOException, InterruptedException, ClassNotFoundException
       {
           // Add these statements. XXX
   //        File jarFile = EJob.createTempJar("target/classes");
   //        EJob.addClasspath("D:/PAUL/WORK/WORK-SPACES/TEST1/cloudputing/src/main/resources");
   //        ClassLoader classLoader = EJob.getClassLoader();
   //        Thread.currentThread().setContextClassLoader(classLoader);
   
           Configuration config = HBaseConfiguration.create();
           addTmpJar("file:/D:/PAUL/WORK/WORK-SPACES/TEST1/cloudputing/target/bigdata-1.0.jar",config);
           
           Job job = new Job(config, "ExampleRead");
           // And add this statement. XXX
   //        ((JobConf) job.getConfiguration()).setJar(jarFile.toString());
   
   //        TableMapReduceUtil.addDependencyJars(job);
   //        TableMapReduceUtil.addDependencyJars(job.getConfiguration(),
   //                MapreduceRead.class,MyMapper.class);
           
           job.setJarByClass(MapreduceRead.class);     // class that contains mapper
           
           Scan scan = new Scan();
           scan.setCaching(500);        // 1 is the default in Scan, which will be bad for MapReduce jobs
           scan.setCacheBlocks(false);  // don't set to true for MR jobs
           // set other scan attrs
           
           TableMapReduceUtil.initTableMapperJob(
                   "wiki",        // input HBase table name
                   scan,             // Scan instance to control CF and attribute selection
                   MapreduceRead.MyMapper.class,   // mapper
                   null,             // mapper output key 
                   null,             // mapper output value
                   job);
           job.setOutputFormatClass(NullOutputFormat.class);   // because we aren't emitting anything from mapper
           
   //        DistributedCache.addFileToClassPath(new Path("hdfs://node.tracker1:9000/user/root/lib/stat-analysis-mapred-1.0-SNAPSHOT.jar"),job.getConfiguration());
           
           boolean b = job.waitForCompletion(true);
           if (!b) {
               throw new IOException("error with job!");
           }
           
       }
       
       /**
        * 為Mapreduce添加第三方jar包
        * 
        * @param jarPath
        *            舉例：D:/Java/new_java_workspace/scm/lib/guava-r08.jar
        * @param conf
        * @throws IOException
        */
       public static void addTmpJar(String jarPath, Configuration conf) throws IOException {
           System.setProperty("path.separator", ":");
           FileSystem fs = FileSystem.getLocal(conf);
           String newJarPath = new Path(jarPath).makeQualified(fs).toString();
           String tmpjars = conf.get("tmpjars");
           if (tmpjars == null || tmpjars.length() == 0) {
               conf.set("tmpjars", newJarPath);
           } else {
               conf.set("tmpjars", tmpjars + ":" + newJarPath);
           }
       }
       
       public static class MyMapper extends TableMapper<Text, Text> {
   
           public void map(ImmutableBytesWritable row, Result value,
                   Context context) throws InterruptedException, IOException {
               String val1 = getValue(value.getValue(Bytes.toBytes("text"), Bytes.toBytes("qual1")));
               String val2 = getValue(value.getValue(Bytes.toBytes("text"), Bytes.toBytes("qual2")));
               System.out.println(val1 + " -- " + val2);
           }
           
           private String getValue(byte [] value)
           {
               return value == null? "null" : new String(value);
           }
       } 
   
   }

posted on 2013-01-29 00:19 paulwong 閱讀(1761) 評論(0)  編輯  收藏 所屬分類: 分布式 、HADOOP 、云計算 、HBASE