Java tutorial
/** * Copyright 2014 tgrape Inc. * * 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 ph.fingra.hadoop.mapred.parts.distribution; import java.io.IOException; import java.util.ArrayList; import java.util.List; 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.io.LongWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.io.WritableComparable; import org.apache.hadoop.io.WritableComparator; import org.apache.hadoop.mapreduce.Job; import org.apache.hadoop.mapreduce.Mapper; import org.apache.hadoop.mapreduce.Partitioner; import org.apache.hadoop.mapreduce.Reducer; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import org.apache.hadoop.util.Tool; import org.apache.hadoop.util.ToolRunner; import ph.fingra.hadoop.common.ConstantVars; import ph.fingra.hadoop.common.FingraphConfig; import ph.fingra.hadoop.common.HfsPathInfo; import ph.fingra.hadoop.common.LfsPathInfo; import ph.fingra.hadoop.common.ConstantVars.LogParserType; import ph.fingra.hadoop.common.ConstantVars.LogValidation; import ph.fingra.hadoop.common.domain.TargetDate; import ph.fingra.hadoop.common.logger.ErrorLogger; import ph.fingra.hadoop.common.logger.WorkLogger; import ph.fingra.hadoop.common.util.ArgsOptionUtil; import ph.fingra.hadoop.common.util.FormatUtil; import ph.fingra.hadoop.mapred.common.CopyToLocalFile; import ph.fingra.hadoop.mapred.common.HdfsFileUtil; import ph.fingra.hadoop.mapred.parse.CommonLogParser; import ph.fingra.hadoop.mapred.parse.ComponentLogParser; import ph.fingra.hadoop.mapred.parts.distribution.domain.LanguageEntity; import ph.fingra.hadoop.mapred.parts.distribution.domain.LanguageKey; public class LanguageStatistic extends Configured implements Tool { @Override public int run(String[] args) throws Exception { String opt_mode = ""; String opt_target = ""; int opt_numreduce = 0; FingraphConfig fingraphConfig = new FingraphConfig(); TargetDate targetDate = null; Configuration conf = getConf(); Path[] inputPaths = null; Path outputPath = null; // get -D optional value opt_mode = conf.get(ConstantVars.DOPTION_RUNMODE, ""); opt_target = conf.get(ConstantVars.DOPTION_TARGETDATE, ""); opt_numreduce = conf.getInt(ConstantVars.DOPTION_NUMREDUCE, 0); // runmode & targetdate check if (ArgsOptionUtil.checkRunmode(opt_mode) == false) { throw new Exception("option value of -Drunmode is not correct"); } if (opt_target.isEmpty() == false) { if (ArgsOptionUtil.checkTargetDateByMode(opt_mode, opt_target) == false) { throw new Exception("option value of -Dtargetdate is not correct"); } } else { opt_target = ArgsOptionUtil.getDefaultTargetDateByMode(opt_mode); } // get TargetDate info from opt_target targetDate = ArgsOptionUtil.getTargetDate(opt_mode, opt_target); WorkLogger.log(LanguageStatistic.class.getSimpleName() + " : [run mode] " + opt_mode + " , [target date] " + targetDate.getFulldate() + " , [reducer count] " + opt_numreduce); // get this job's input path - transform log file inputPaths = HdfsFileUtil.getTransformInputPaths(fingraphConfig, opt_mode, targetDate.getYear(), targetDate.getMonth(), targetDate.getDay(), targetDate.getHour(), targetDate.getWeek()); if (inputPaths == null) { WorkLogger.log("There is no input data."); return 0; } // get this job's output path HfsPathInfo hfsPath = new HfsPathInfo(fingraphConfig, opt_mode); outputPath = new Path(hfsPath.getLanguage()); // delete previous output path if is exist FileSystem fs = FileSystem.get(conf); List<Path> deletePaths = new ArrayList<Path>(); deletePaths.add(outputPath); for (Path deletePath : deletePaths) { fs.delete(deletePath, true); } Job job = createJob(conf, inputPaths, outputPath, opt_numreduce, fingraphConfig); int status = job.waitForCompletion(true) ? 0 : 1; // copy to local result paths LfsPathInfo lfsPath = new LfsPathInfo(fingraphConfig, targetDate); CopyToLocalFile copier = new CopyToLocalFile(); copier.dirToFile(outputPath.toString(), lfsPath.getLanguage()); return status; } public Job createJob(Configuration conf, Path[] inputpaths, Path outputpath, int numreduce, FingraphConfig finconfig) throws IOException { conf.setBoolean("verbose", finconfig.getDebug().isDebug_show_verbose()); conf.setBoolean("counter", finconfig.getDebug().isDebug_show_counter()); Job job = new Job(conf); String jobName = "distribute/language job"; job.setJobName(jobName); job.setJarByClass(LanguageStatistic.class); for (int i = 0; i < inputpaths.length; i++) { FileInputFormat.addInputPath(job, inputpaths[i]); } FileOutputFormat.setOutputPath(job, outputpath); job.setMapperClass(LanguageMapper.class); job.setReducerClass(LanguageReducer.class); job.setMapOutputKeyClass(LanguageKey.class); job.setMapOutputValueClass(LanguageEntity.class); job.setOutputKeyClass(Text.class); job.setOutputValueClass(Text.class); job.setPartitionerClass(LanguagePartitioner.class); job.setSortComparatorClass(LanguageSortComparator.class); job.setGroupingComparatorClass(LanguageGroupComparator.class); job.setNumReduceTasks(numreduce); return job; } static class LanguageMapper extends Mapper<LongWritable, Text, LanguageKey, LanguageEntity> { private boolean verbose = false; private boolean counter = false; private CommonLogParser commonparser = new CommonLogParser(); private ComponentLogParser compoparser = new ComponentLogParser(); private LanguageKey out_key = new LanguageKey(); private LanguageEntity out_val = new LanguageEntity(); protected void setup(Context context) throws IOException, InterruptedException { verbose = context.getConfiguration().getBoolean("verbose", false); counter = context.getConfiguration().getBoolean("counter", false); } @Override protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException { // logtype check LogParserType logtype = FormatUtil.getLogParserType(value.toString()); if (logtype.equals(LogParserType.CommonLog)) { // CommonLog : STARTSESS/PAGEVIEW/ENDSESS commonparser.parse(value); if (commonparser.hasError() == false) { out_key.set(commonparser.getAppkey(), commonparser.getLanguage(), commonparser.getToken(), commonparser.getSession()); out_val.set(commonparser.getToken(), commonparser.getSession(), commonparser.getCmd()); context.write(out_key, out_val); } else { if (verbose) System.err.println("Ignoring corrupt input: " + value); } if (counter) context.getCounter(commonparser.getErrorLevel()).increment(1); } else if (logtype.equals(LogParserType.ComponentLog)) { // ComponentLog : COMPONENT compoparser.parse(value); if (compoparser.hasError() == false) { out_key.set(compoparser.getAppkey(), compoparser.getLanguage(), compoparser.getToken(), compoparser.getSession()); out_val.set(compoparser.getToken(), compoparser.getSession(), compoparser.getCmd()); context.write(out_key, out_val); } else { if (verbose) System.err.println("Ignoring corrupt input: " + value); } if (counter) context.getCounter(compoparser.getErrorLevel()).increment(1); } else { if (verbose) System.err.println("Ignoring corrupt input: " + value); if (counter) context.getCounter(LogValidation.MALFORMED).increment(1); } } } static class LanguageReducer extends Reducer<LanguageKey, LanguageEntity, Text, Text> { private Text out_key = new Text(); private Text out_val = new Text(); @Override protected void reduce(LanguageKey key, Iterable<LanguageEntity> values, Context context) throws IOException, InterruptedException { long user_count = 0; long session_count = 0; String prev_token = ""; String prev_session = ""; for (LanguageEntity cur_val : values) { // values : // - grouped by appkey/language // - and order by appkey/language/token/session if (prev_token.equals(cur_val.token) == false) { user_count += 1l; } if (prev_session.equals(cur_val.session) == false) { session_count += 1l; } prev_token = cur_val.token; prev_session = cur_val.session; } out_key.set(key.appkey + ConstantVars.RESULT_FIELD_SEPERATER + key.language); out_val.set(String.valueOf(user_count) + ConstantVars.RESULT_FIELD_SEPERATER + String.valueOf(session_count)); context.write(out_key, out_val); } } private static class LanguagePartitioner extends Partitioner<LanguageKey, LanguageEntity> { @Override public int getPartition(LanguageKey key, LanguageEntity value, int numPartitions) { return Math.abs((key.appkey + key.language).hashCode() * 127) % numPartitions; } } private static class LanguageSortComparator extends WritableComparator { protected LanguageSortComparator() { super(LanguageKey.class, true); } @SuppressWarnings("rawtypes") @Override public int compare(WritableComparable w1, WritableComparable w2) { LanguageKey k1 = (LanguageKey) w1; LanguageKey k2 = (LanguageKey) w2; // ordered by LanguageKey compareTo int ret = k1.compareTo(k2); return ret; } } private static class LanguageGroupComparator extends WritableComparator { protected LanguageGroupComparator() { super(LanguageKey.class, true); } @SuppressWarnings("rawtypes") @Override public int compare(WritableComparable w1, WritableComparable w2) { LanguageKey k1 = (LanguageKey) w1; LanguageKey k2 = (LanguageKey) w2; // grouped by appkey/language int ret = k1.appkey.compareTo(k2.appkey); if (ret != 0) return ret; ret = k1.language.compareTo(k2.language); return ret; } } /** * * @param args */ public static void main(String[] args) { long start_time = 0, end_time = 0; int exitCode = 0; start_time = System.currentTimeMillis(); WorkLogger.log(LanguageStatistic.class.getSimpleName() + " : Start mapreduce job"); try { exitCode = ToolRunner.run(new LanguageStatistic(), args); WorkLogger.log(LanguageStatistic.class.getSimpleName() + " : End mapreduce job"); } catch (Exception e) { ErrorLogger.log(LanguageStatistic.class.getSimpleName() + " : Error : " + e.getMessage()); WorkLogger.log(LanguageStatistic.class.getSimpleName() + " : Failed mapreduce job"); } end_time = System.currentTimeMillis(); try { FingraphConfig config = new FingraphConfig(); if (config.getDebug().isDebug_show_spenttime()) WorkLogger .log("DEBUG - run times : " + FormatUtil.getDurationFromMillitimes(end_time - start_time)); } catch (IOException ignore) { } System.exit(exitCode); } }