Java tutorial
/* * Mavuno: A Hadoop-Based Text Mining Toolkit * * 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 edu.isi.mavuno.app.distsim; import java.io.IOException; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.conf.Configured; import org.apache.hadoop.fs.FileStatus; import org.apache.hadoop.util.Tool; import org.apache.hadoop.util.ToolRunner; import org.apache.log4j.Logger; import edu.isi.mavuno.extract.CombineSplits; import edu.isi.mavuno.extract.ExtractGlobalStats; import edu.isi.mavuno.extract.Extract; import edu.isi.mavuno.extract.Split; import edu.isi.mavuno.util.MavunoUtils; /** * @author metzler * */ public class ContextToPattern extends Configured implements Tool { private static final Logger sLogger = Logger.getLogger(ContextToPattern.class); public ContextToPattern(Configuration conf) { super(conf); } /* (non-Javadoc) * @see org.apache.hadoop.util.Tool#run(java.lang.String[]) */ @Override public int run(String[] args) throws ClassNotFoundException, InterruptedException, IOException { MavunoUtils.readParameters(args, "Mavuno.ContextToPattern", getConf()); return run(); } public int run() throws ClassNotFoundException, InterruptedException, IOException { Configuration conf = getConf(); String contextPath = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.ContextPath", conf); String corpusPath = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.CorpusPath", conf); String corpusClass = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.CorpusClass", conf); String extractorClass = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.ExtractorClass", conf); String extractorArgs = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.ExtractorArgs", conf); String minMatches = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.MinMatches", conf); boolean harvestGlobalStats = Boolean .parseBoolean(MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.GlobalStats", conf)); String outputPath = MavunoUtils.getRequiredParam("Mavuno.ContextToPattern.OutputPath", conf); MavunoUtils.createDirectory(conf, outputPath); sLogger.info("Tool name: ContextToPattern"); sLogger.info(" - Context path: " + contextPath); sLogger.info(" - Corpus path: " + corpusPath); sLogger.info(" - Corpus class: " + corpusClass); sLogger.info(" - Extractor class: " + extractorClass); sLogger.info(" - Extractor args: " + extractorArgs); sLogger.info(" - Min matches: " + minMatches); sLogger.info(" - Harvest global stats: " + harvestGlobalStats); sLogger.info(" - Output path: " + outputPath); // set total terms path conf.set("Mavuno.TotalTermsPath", outputPath + "/totalTerms"); // split contexts into manageable chunks conf.set("Mavuno.Split.InputPath", contextPath); conf.set("Mavuno.Split.OutputPath", outputPath + "/contexts-split"); conf.set("Mavuno.Split.SplitKey", "context"); new Split(conf).run(); // get context splits FileStatus[] files = MavunoUtils.getDirectoryListing(conf, outputPath + "/contexts-split"); int split = 0; for (FileStatus file : files) { if (!file.getPath().getName().endsWith(".examples")) { continue; } // extract patterns conf.set("Mavuno.Extract.InputPath", file.getPath().toString()); conf.set("Mavuno.Extract.CorpusPath", corpusPath); conf.set("Mavuno.Extract.CorpusClass", corpusClass); conf.set("Mavuno.Extract.ExtractorClass", extractorClass); conf.set("Mavuno.Extract.ExtractorArgs", extractorArgs); conf.set("Mavuno.Extract.ExtractorTarget", "pattern"); conf.set("Mavuno.Extract.MinMatches", minMatches); conf.set("Mavuno.Extract.OutputPath", outputPath + "/contexts-split/patterns/" + split); new Extract(conf).run(); // increment split split++; } // extract global pattern statistics if necessary if (harvestGlobalStats) { conf.set("Mavuno.ExtractGlobalStats.InputPath", outputPath + "/contexts-split/patterns/"); conf.set("Mavuno.ExtractGlobalStats.CorpusPath", corpusPath); conf.set("Mavuno.ExtractGlobalStats.CorpusClass", corpusClass); conf.set("Mavuno.ExtractGlobalStats.ExtractorClass", extractorClass); conf.set("Mavuno.ExtractGlobalStats.ExtractorArgs", extractorArgs); conf.set("Mavuno.ExtractGlobalStats.ExtractorTarget", "pattern"); conf.set("Mavuno.ExtractGlobalStats.OutputPath", outputPath + "/contexts-split/pattern-stats/"); new ExtractGlobalStats(conf).run(); } // combine context splits conf.set("Mavuno.CombineSplits.ExamplesPath", outputPath + "/contexts-split/patterns"); conf.set("Mavuno.CombineSplits.ExampleStatsPath", outputPath + "/contexts-split/pattern-stats"); conf.set("Mavuno.CombineSplits.SplitKey", "context"); conf.setInt("Mavuno.CombineSplits.TotalSplits", split); conf.set("Mavuno.CombineSplits.OutputPath", outputPath + "/pattern-stats"); new CombineSplits(conf).run(); // delete context splits MavunoUtils.removeDirectory(conf, outputPath + "/contexts-split"); return 0; } /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { Configuration conf = new Configuration(); int res = ToolRunner.run(new ContextToPattern(conf), args); System.exit(res); } }