Txt2SeqConverter.java Source code

Introduction

Here is the source code for Txt2SeqConverter.java

Source

/*
 * Copyright 2012-14 Justin A. Debrabant <debrabant@cs.brown.edu> and Matteo Riondato <matteo@cs.brown.edu>
 *
 * 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.
 *
 */

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Text;

public class Txt2SeqConverter {
    public static void main(String[] args) {
        if (args.length != 2) {
            //System.out.println("Usage: env HADOOP_CLASSPATH=.:$HADOOP_CLASSPATH hadoop Txt2SeqConverter input output");
            System.out.println("Usage: hadoop Txt2SeqConverter input output");
            System.exit(1);
        }
        FileSystem fs = null;
        String seqFileName = args[1];
        Configuration conf = new Configuration();
        try {
            fs = FileSystem.get(URI.create(seqFileName), conf);
        } catch (IOException e) {
            System.out.println("ERROR: " + e.getMessage());
        }

        Path path = new Path(seqFileName);

        LongWritable key = new LongWritable();
        Text value = new Text();
        SequenceFile.Writer writer = null;
        try {
            //writer = SequenceFile.createWriter(fs, conf, path, LongWritable.class, Text.class, SequenceFile.CompressionType.BLOCK);
            writer = SequenceFile.createWriter(fs, conf, path, LongWritable.class, Text.class,
                    SequenceFile.CompressionType.BLOCK, new com.hadoop.compression.lzo.LzoCodec());
            BufferedReader br = new BufferedReader(new FileReader(args[0]));

            int transactionID = 0;
            String transaction = null;
            while ((transaction = br.readLine()) != null) {
                key.set(transactionID);
                value.set(transaction);
                writer.append(key, value);

                transactionID++;
            }
        } catch (IOException e) {
            System.out.println("ERROR: " + e.getMessage());
        } finally {
            IOUtils.closeStream(writer);
        }
    }
}