ivory.core.driver.PreprocessClueWebEnglishMultipleSegments.java Source code

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Here is the source code for ivory.core.driver.PreprocessClueWebEnglishMultipleSegments.java

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/*
 * Ivory: A Hadoop toolkit for Web-scale information retrieval
 *
 * 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 ivory.core.driver;

import ivory.core.Constants;
import ivory.core.RetrievalEnvironment;
import ivory.core.preprocess.BuildDictionary;
import ivory.core.preprocess.BuildIntDocVectors;
import ivory.core.preprocess.BuildIntDocVectorsForwardIndex;
import ivory.core.preprocess.BuildTermDocVectors;
import ivory.core.preprocess.BuildTermDocVectorsForwardIndex;
import ivory.core.preprocess.ComputeGlobalTermStatistics;
import ivory.core.tokenize.GalagoTokenizer;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;

import edu.umd.cloud9.collection.clue.ClueWarcDocnoMapping;

public class PreprocessClueWebEnglishMultipleSegments extends Configured implements Tool {
    private static final Logger LOG = Logger.getLogger(PreprocessClueWebEnglishMultipleSegments.class);

    public int run(String[] args) throws Exception {
        if (args.length < 4) {
            System.out.println("usage: [index-path] [num-of-mappers] [num-of-reducers] [input-path]...");
            ToolRunner.printGenericCommandUsage(System.out);
            return -1;
        }

        String indexPath = args[0];
        int numMappers = Integer.parseInt(args[1]);
        int numReducers = Integer.parseInt(args[2]);

        StringBuilder sb = new StringBuilder(args[3]);
        if (args.length > 4) {
            for (int i = 4; i < args.length; i++) {
                sb.append(",");
                sb.append(args[i]);
            }
        }
        String collection = sb.toString();

        LOG.info("Tool name: PreprocessClueWebEnglishMultipleSegments");
        LOG.info(" - Index path: " + indexPath);
        LOG.info(" - Collections: " + collection);

        Configuration conf = new Configuration();
        FileSystem fs = FileSystem.get(conf);
        RetrievalEnvironment env = new RetrievalEnvironment(indexPath, fs);

        Path p = new Path(indexPath);
        if (!fs.exists(p)) {
            LOG.error("Error: index path doesn't exist!");
            return 0;
        }

        if (!fs.exists(env.getDocnoMappingData())) {
            LOG.error("Error: docno mapping data doesn't exist!");
            return 0;
        }

        conf.setInt(Constants.NumMapTasks, numMappers);
        conf.setInt(Constants.NumReduceTasks, numReducers);

        conf.set(Constants.CollectionName, "ClueWeb:English");
        conf.set(Constants.CollectionPath, collection);
        conf.set(Constants.IndexPath, indexPath);
        conf.set(Constants.InputFormat, SequenceFileInputFormat.class.getCanonicalName());
        conf.set(Constants.Tokenizer, GalagoTokenizer.class.getCanonicalName());
        conf.set(Constants.DocnoMappingClass, ClueWarcDocnoMapping.class.getCanonicalName());
        conf.set(Constants.DocnoMappingFile, env.getDocnoMappingData().toString());

        conf.setInt(Constants.DocnoOffset, 0);
        conf.setInt(Constants.MinDf, 50);
        conf.setInt(Constants.MaxDf, Integer.MAX_VALUE);
        conf.setInt(Constants.TermIndexWindow, 8);

        new BuildTermDocVectors(conf).run();
        new ComputeGlobalTermStatistics(conf).run();
        new BuildDictionary(conf).run();
        new BuildIntDocVectors(conf).run();

        new BuildIntDocVectorsForwardIndex(conf).run();
        new BuildTermDocVectorsForwardIndex(conf).run();

        return 0;
    }

    public static void main(String[] args) throws Exception {
        ToolRunner.run(new PreprocessClueWebEnglishMultipleSegments(), args);
    }
}