/**
* 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.
*/
package org.apache.mahout.classifier.email;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
import org.apache.hadoop.util.ToolRunner;
import org.apache.mahout.common.AbstractJob;
import org.apache.mahout.common.HadoopUtil;
import org.apache.mahout.common.commandline.DefaultOptionCreator;
import org.apache.mahout.math.VectorWritable;
import java.util.Map;
/**
* Convert the labels generated by {@link org.apache.mahout.text.SequenceFilesFromMailArchives} and
* {@link org.apache.mahout.vectorizer.SparseVectorsFromSequenceFiles} to ones consumable by the classifiers. We do this
* here b/c if it is done in the creation of sparse vectors, the Reducer collapses all the vectors.
*/
public class PrepEmailVectorsDriver extends AbstractJob {
public static final String ITEMS_PER_CLASS = "itemsPerClass";
public static final String USE_LIST_NAME = "USE_LIST_NAME";
public static void main(String[] args) throws Exception {
ToolRunner.run(new Configuration(), new PrepEmailVectorsDriver(), args);
}
@Override
public int run(String[] args) throws Exception {
addInputOption();
addOutputOption();
addOption(DefaultOptionCreator.overwriteOption().create());
addOption("maxItemsPerLabel", "mipl", "The maximum number of items per label. Can be useful for making the training sets the same size", String.valueOf(100000));
addOption(buildOption("useListName", "ul", "Use the name of the list as part of the label. If not set, then just use the project name", false, false, "false"));
Map<String,String> parsedArgs = parseArguments(args);
if (parsedArgs == null) {
return -1;
}
Path input = getInputPath();
Path output = getOutputPath();
if (hasOption(DefaultOptionCreator.OVERWRITE_OPTION)) {
HadoopUtil.delete(getConf(), output);
}
Job convertJob = prepareJob(input, output, SequenceFileInputFormat.class, PrepEmailMapper.class,
Text.class, VectorWritable.class, PrepEmailReducer.class, Text.class, VectorWritable.class, SequenceFileOutputFormat.class);
convertJob.getConfiguration().set(ITEMS_PER_CLASS, parsedArgs.get("--maxItemsPerLabel"));
convertJob.getConfiguration().set(USE_LIST_NAME, String.valueOf(parsedArgs.containsKey("--useListName")));
convertJob.waitForCompletion(true);
return 0;
}
}