org.apache.mahout.clustering.syntheticcontrol.meanshift.OutputDriver.java Source code

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Here is the source code for org.apache.mahout.clustering.syntheticcontrol.meanshift.OutputDriver.java

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/**
 * 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.clustering.syntheticcontrol.meanshift;

import java.io.IOException;

import org.apache.commons.cli2.CommandLine;
import org.apache.commons.cli2.Group;
import org.apache.commons.cli2.Option;
import org.apache.commons.cli2.OptionException;
import org.apache.commons.cli2.builder.GroupBuilder;
import org.apache.commons.cli2.commandline.Parser;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.SequenceFileInputFormat;
import org.apache.mahout.common.CommandLineUtil;
import org.apache.mahout.common.commandline.DefaultOptionCreator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class OutputDriver {
    /** Logger for this class. */
    private static final Logger LOG = LoggerFactory.getLogger(OutputDriver.class);

    private OutputDriver() {
    }

    public static void main(String[] args) throws IOException {
        GroupBuilder gbuilder = new GroupBuilder();

        Option inputOpt = DefaultOptionCreator.inputOption().withRequired(false).create();
        Option outputOpt = DefaultOptionCreator.outputOption().withRequired(false).create();
        Option helpOpt = DefaultOptionCreator.helpOption();
        Group group = gbuilder.withName("Options").withOption(inputOpt).withOption(outputOpt).withOption(helpOpt)
                .create();

        try {
            Parser parser = new Parser();
            parser.setGroup(group);
            CommandLine cmdLine = parser.parse(args);
            if (cmdLine.hasOption(helpOpt)) {
                CommandLineUtil.printHelp(group);
                return;
            }

            String input = cmdLine.getValue(inputOpt, "testdata").toString();
            String output = cmdLine.getValue(outputOpt, "output").toString();
            runJob(input, output);
        } catch (OptionException e) {
            OutputDriver.LOG.error("Exception parsing command line: ", e);
            CommandLineUtil.printHelp(group);
        }
    }

    public static void runJob(String input, String output) throws IOException {
        JobClient client = new JobClient();
        JobConf conf = new JobConf(org.apache.mahout.clustering.syntheticcontrol.meanshift.OutputDriver.class);

        conf.setOutputKeyClass(Text.class);
        conf.setOutputValueClass(Text.class);
        conf.setInputFormat(SequenceFileInputFormat.class);

        FileInputFormat.setInputPaths(conf, new Path(input));
        FileOutputFormat.setOutputPath(conf, new Path(output));

        conf.setMapperClass(OutputMapper.class);

        conf.setReducerClass(Reducer.class);
        conf.setNumReduceTasks(0);

        client.setConf(conf);
        JobClient.runJob(conf);
    }

}