nl.naward04.hadoop.country.Country.java Source code

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Here is the source code for nl.naward04.hadoop.country.Country.java

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/**
 * Copyright 2014 SURFsara
 *
 * Licensed 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.
 */
package nl.naward04.hadoop.country;

import nl.surfsara.warcutils.WarcInputFormat;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.GzipCodec;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
import org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer;
import org.apache.hadoop.util.Tool;

/**
 * Tool implementation that runs a mapreduce job that extracts servertype strings from wat files. 
 * 
 * @author mathijs.kattenberg@surfsara.nl
 */
public class Country extends Configured implements Tool {

    @Override
    public int run(String[] args) throws Exception {

        Configuration conf = this.getConf();

        // Set compress type to compress BLOCKs (not RECORDs)
        // https://hadoop.apache.org/docs/r2.4.0/hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml
        // http://hadoop.apache.org/docs/r2.4.0/api/org/apache/hadoop/io/SequenceFile.html
        conf.set(FileOutputFormat.COMPRESS_TYPE, "BLOCK");

        Job job = Job.getInstance(conf, "Find the country based on domain name or IP address.");
        job.setJarByClass(Country.class);

        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        job.setMapperClass(CountryLookup.class);
        job.setInputFormatClass(WarcInputFormat.class);
        job.setOutputFormatClass(SequenceFileOutputFormat.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);

        // Enable compression
        FileOutputFormat.setCompressOutput(job, true);
        FileOutputFormat.setOutputCompressorClass(job, GzipCodec.class);

        // Execute job and return status
        return job.waitForCompletion(true) ? 0 : 1;

    }

}