Windows环境下用ECLIPSE提交MAPREDUCE JOB至远程HBASE中运行

假设远程HADOOP主机名为ubuntu，则应在hosts文件中加上192.168.58.130 ubuntu
新建MAVEN项目，加上相应的配置
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.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>

hbase-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<configuration>

    <property>
        <name>hbase.rootdir</name>
        <value>hdfs://ubuntu:9000/hbase</value>
    </property>

    
    <property>
        <name>mapred.job.tracker</name>
        <value>ubuntu:9001</value>
    </property>

    <property>
        <name>hbase.cluster.distributed</name>
        <value>true</value>
    </property>

    
    <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>

测试文件：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();
    }

}

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!");
        }

    }

    /**
     * 为Mapreduce添加第三方jar包
     *
     * @param jarPath
     *            举例：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 阅读(1754) 评论(0) 编辑收藏所属分类: 分布式、HADOOP 、云计算、HBASE


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Windows环境下用ECLIPSE提交MAPREDUCE JOB至远程HBASE中运行