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.prerole; import java.io.IOException; import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Set; 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.NullWritable; import org.apache.hadoop.io.Text; 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.DataUsable; 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; public class BasekeysMaker 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_appkey = null; Path outputPath_componentkey = 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(BasekeysMaker.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_appkey = new Path(hfsPath.getAppkey()); outputPath_componentkey = new Path(hfsPath.getComponentkey()); // delete previous output path if is exist FileSystem fs = FileSystem.get(conf); List<Path> deletePaths = new ArrayList<Path>(); deletePaths.add(outputPath_appkey); deletePaths.add(outputPath_componentkey); for (Path deletePath : deletePaths) { fs.delete(deletePath, true); } Job jobappkey = createJobAppkey(conf, inputPaths, outputPath_appkey, opt_numreduce, fingraphConfig); int status = jobappkey.waitForCompletion(true) ? 0 : 1; Job jobcomponentkey = createJobComponentkey(conf, inputPaths, outputPath_componentkey, opt_numreduce, fingraphConfig); status = jobcomponentkey.waitForCompletion(true) ? 0 : 1; // copy to local result paths LfsPathInfo lfsPath = new LfsPathInfo(fingraphConfig, targetDate); CopyToLocalFile copier = new CopyToLocalFile(); copier.dirToFile(outputPath_appkey.toString(), lfsPath.getAppkey()); copier.dirToFile(outputPath_componentkey.toString(), lfsPath.getComponentkey()); return status; } public Job createJobAppkey(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 = "prerole/appkey job"; job.setJobName(jobName); job.setJarByClass(BasekeysMaker.class); for (int i = 0; i < inputpaths.length; i++) { FileInputFormat.addInputPath(job, inputpaths[i]); } FileOutputFormat.setOutputPath(job, outputpath); job.setMapperClass(AppkeyMapper.class); job.setReducerClass(AppkeyReducer.class); job.setMapOutputKeyClass(Text.class); job.setMapOutputValueClass(Text.class); job.setOutputKeyClass(NullWritable.class); job.setOutputValueClass(Text.class); job.setPartitionerClass(AppkeyPartitioner.class); job.setNumReduceTasks(numreduce); return job; } public Job createJobComponentkey(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 = "prerole/componentkey job"; job.setJobName(jobName); job.setJarByClass(BasekeysMaker.class); for (int i = 0; i < inputpaths.length; i++) { FileInputFormat.addInputPath(job, inputpaths[i]); } FileOutputFormat.setOutputPath(job, outputpath); job.setMapperClass(ComponentkeyMapper.class); job.setReducerClass(ComponentkeyReducer.class); job.setMapOutputKeyClass(Text.class); job.setMapOutputValueClass(Text.class); job.setOutputKeyClass(Text.class); job.setOutputValueClass(Text.class); job.setPartitionerClass(ComponentkeyPartitioner.class); job.setNumReduceTasks(numreduce); return job; } static class AppkeyMapper extends Mapper<LongWritable, Text, Text, Text> { private boolean verbose = false; private boolean counter = false; private CommonLogParser commonparser = new CommonLogParser(); private ComponentLogParser compoparser = new ComponentLogParser(); private Text out_key = new Text(); private Text out_val = new Text(); 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()); out_val.set(commonparser.getAppkey()); 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()); out_val.set(compoparser.getAppkey()); 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 AppkeyReducer extends Reducer<Text, Text, NullWritable, Text> { @Override protected void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException { Set<Text> appkeys = new HashSet<Text>(); for (Text value : values) { if (appkeys.contains(value) == false) { appkeys.add(value); context.write(NullWritable.get(), value); } } } } private static class AppkeyPartitioner extends Partitioner<Text, Text> { @Override public int getPartition(Text key, Text value, int numPartitions) { return Math.abs(key.hashCode() * 127) % numPartitions; } } static class ComponentkeyMapper extends Mapper<LongWritable, Text, Text, Text> { private boolean verbose = false; private boolean counter = false; private ComponentLogParser compoparser = new ComponentLogParser(); private Text out_key = new Text(); private Text out_val = new Text(); 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 // not used in componentkey if (counter) context.getCounter(DataUsable.USELESS).increment(1); } else if (logtype.equals(LogParserType.ComponentLog)) { // ComponentLog : COMPONENT compoparser.parse(value); if (compoparser.hasError() == false) { out_key.set(compoparser.getAppkey()); out_val.set(compoparser.getComponentkey()); 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 ComponentkeyReducer extends Reducer<Text, Text, Text, Text> { @Override protected void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException { Set<Text> componentkeys = new HashSet<Text>(); for (Text value : values) { if (componentkeys.contains(value) == false) { componentkeys.add(value); context.write(key, value); } } } } private static class ComponentkeyPartitioner extends Partitioner<Text, Text> { @Override public int getPartition(Text key, Text value, int numPartitions) { return Math.abs(key.hashCode() * 127) % numPartitions; } } /** * * @param args */ public static void main(String[] args) { long start_time = 0, end_time = 0; int exitCode = 0; start_time = System.currentTimeMillis(); WorkLogger.log(BasekeysMaker.class.getSimpleName() + " : Start mapreduce job"); try { exitCode = ToolRunner.run(new BasekeysMaker(), args); WorkLogger.log(BasekeysMaker.class.getSimpleName() + " : End mapreduce job"); } catch (Exception e) { ErrorLogger.log(BasekeysMaker.class.getSimpleName() + " : Error : " + e.getMessage()); WorkLogger.log(BasekeysMaker.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); } }