org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper Java Examples
The following examples show how to use
org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper.
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Example #1
Source File: MultithreadedMapRunner.java From hadoop with Apache License 2.0 | 6 votes |
@SuppressWarnings("unchecked") public void configure(JobConf jobConf) { int numberOfThreads = jobConf.getInt(MultithreadedMapper.NUM_THREADS, 10); if (LOG.isDebugEnabled()) { LOG.debug("Configuring jobConf " + jobConf.getJobName() + " to use " + numberOfThreads + " threads"); } this.job = jobConf; //increment processed counter only if skipping feature is enabled this.incrProcCount = SkipBadRecords.getMapperMaxSkipRecords(job)>0 && SkipBadRecords.getAutoIncrMapperProcCount(job); this.mapper = ReflectionUtils.newInstance(jobConf.getMapperClass(), jobConf); // Creating a threadpool of the configured size to execute the Mapper // map method in parallel. executorService = new ThreadPoolExecutor(numberOfThreads, numberOfThreads, 0L, TimeUnit.MILLISECONDS, new BlockingArrayQueue (numberOfThreads)); }
Example #2
Source File: MultithreadedZipContentLoader.java From marklogic-contentpump with Apache License 2.0 | 6 votes |
public static void main(String[] args) throws Exception { Configuration conf = new Configuration(); String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs(); if (otherArgs.length < 2) { System.err.println("Usage: MultithreadedZipContentLoader configFile inputDir threadCount"); System.exit(2); } Job job = Job.getInstance(conf); job.setJarByClass(MultithreadedZipContentLoader.class); job.setInputFormatClass(ZipContentInputFormat.class); job.setMapperClass(MultithreadedMapper.class); MultithreadedMapper.setMapperClass(job, ZipContentMapper.class); MultithreadedMapper.setNumberOfThreads(job, Integer.parseInt(args[2])); job.setMapOutputKeyClass(DocumentURI.class); job.setMapOutputValueClass(Text.class); job.setOutputFormatClass(ContentOutputFormat.class); ZipContentInputFormat.setInputPaths(job, new Path(otherArgs[1])); conf = job.getConfiguration(); conf.addResource(otherArgs[0]); System.exit(job.waitForCompletion(true) ? 0 : 1); }
Example #3
Source File: MultithreadedMapRunner.java From big-c with Apache License 2.0 | 6 votes |
@SuppressWarnings("unchecked") public void configure(JobConf jobConf) { int numberOfThreads = jobConf.getInt(MultithreadedMapper.NUM_THREADS, 10); if (LOG.isDebugEnabled()) { LOG.debug("Configuring jobConf " + jobConf.getJobName() + " to use " + numberOfThreads + " threads"); } this.job = jobConf; //increment processed counter only if skipping feature is enabled this.incrProcCount = SkipBadRecords.getMapperMaxSkipRecords(job)>0 && SkipBadRecords.getAutoIncrMapperProcCount(job); this.mapper = ReflectionUtils.newInstance(jobConf.getMapperClass(), jobConf); // Creating a threadpool of the configured size to execute the Mapper // map method in parallel. executorService = new ThreadPoolExecutor(numberOfThreads, numberOfThreads, 0L, TimeUnit.MILLISECONDS, new BlockingArrayQueue (numberOfThreads)); }