Example usage for org.apache.hadoop.mapreduce Job setOutputFormatClass

Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce Job setOutputFormatClass.

Prototype

public void setOutputFormatClass(Class<? extends OutputFormat> cls) throws IllegalStateException 

Source Link

Document

Set the OutputFormat for the job.

Usage

From source file:clustering.similarity.PreDriver.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    if (args.length < 2) {
        System.err.printf(/*  ww w.ja  v a 2 s .  c o  m*/
                "usage: %s inverted_index_result_dir output_dir"
                        + " [compress_or_not] [reducer_number] [deci_number]\n",
                this.getClass().getSimpleName());
        System.exit(1);
    }
    Configuration conf = getConf();

    conf = MapReduceUtils.initConf(conf);
    conf.set("mapreduce.reduce.speculative", "false");

    // TODO: 17-4-24 calculate split number from reducer number
    conf.setInt("split.num", 8);

    if (args.length > 3) {
        conf.setInt("reducer.num", Integer.valueOf(args[3]));
    } else {
        conf.setInt("reducer.num", 29);
    }
    if (args.length > 4) {
        conf.setInt("deci.number", Integer.valueOf(args[4]));
    } else {
        conf.setInt("deci.number", 3);
    }

    Job job = Job.getInstance(conf, "pre job");
    job.setJarByClass(PreDriver.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    job.setInputFormatClass(KeyValueTextInputFormat.class);

    job.setMapperClass(PreMapper.class);
    job.setMapOutputKeyClass(IntIntTupleWritable.class);
    job.setMapOutputValueClass(Text.class);

    job.setPartitionerClass(PrePartitioner.class);

    job.setNumReduceTasks(conf.getInt("reducer.num", 29));
    job.setReducerClass(PreReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);

    // set default compression
    if (args.length > 2 && args[2].equals("0")) {
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
    } else {
        job.setOutputFormatClass(SequenceFileOutputFormat.class);
        SequenceFileOutputFormat.setCompressOutput(job, true);
        SequenceFileOutputFormat.setOutputCompressionType(job, SequenceFile.CompressionType.BLOCK);
        SequenceFileOutputFormat.setOutputCompressorClass(job, org.apache.hadoop.io.compress.GzipCodec.class);
        SequenceFileOutputFormat.setOutputPath(job, new Path(args[1]));
    }

    long starttime = System.currentTimeMillis();
    boolean complete = job.waitForCompletion(true);
    long endtime = System.currentTimeMillis();
    System.out.println("inverted similarity pre job finished in: " + (endtime - starttime) / 1000 + " seconds");

    return complete ? 0 : 1;
}

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From source file:cn.edu.hfut.dmic.webcollector.crawldb.DBReader.java

public static void main(String[] args) throws Exception {
    Path crawlPath = new Path("task2");
    Path currentPath = new Path(crawlPath, "crawldb/current");
    Path output = new Path("output");

    Configuration config = CrawlerConfiguration.create();
    FileSystem fs = FileSystem.get(config);

    if (fs.exists(output)) {
        fs.delete(output);/*from w ww . ja  va2s  .com*/
    }

    Job job = new Job(config);
    job.setJobName("dbreader " + crawlPath.toString());
    job.setMapperClass(DBReaderMapper.class);

    job.setInputFormatClass(SequenceFileInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(Text.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    FileInputFormat.addInputPath(job, currentPath);
    FileOutputFormat.setOutputPath(job, output);

    job.waitForCompletion(true);

}

---

From source file:cn.edu.hfut.dmic.webcollector.crawldb.Generator.java

public static String generate(Path crawlPath, Configuration conf) throws Exception {
    SegmentUtil.initSegments(crawlPath, conf);
    String segmentName = SegmentUtil.createSegment(crawlPath, conf);

    Path currentPath = new Path(crawlPath, "crawldb/current");
    Path generatePath = new Path(crawlPath, "segments/" + segmentName + "/generate");

    Job job = new Job(conf);
    job.setJobName("generate " + crawlPath.toString());
    job.setJarByClass(Generator.class);

    job.setReducerClass(GeneratorReducer.class);

    job.setInputFormatClass(SequenceFileInputFormat.class);
    job.setOutputFormatClass(SequenceFileOutputFormat.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(CrawlDatum.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(CrawlDatum.class);
    FileInputFormat.addInputPath(job, currentPath);
    FileOutputFormat.setOutputPath(job, generatePath);
    job.waitForCompletion(true);//from   w  w w  . j  ava  2s . c o m
    long count = job.getCounters().findCounter("generator", "count").getValue();
    System.out.println("total generate:" + count);
    if (count == 0) {
        return null;
    } else {
        return segmentName;
    }

}

---

From source file:cn.edu.hfut.dmic.webcollector.crawldb.Merge.java

public static void merge(Path crawlPath, Path[] mergePaths, Configuration conf, String jobName)
        throws Exception {

    Job job = new Job(conf);
    job.setJobName(jobName + "  " + crawlPath.toString());
    job.setJarByClass(Merge.class);
    // job.getConfiguration().set("mapred", "/home/hu/mygit/WebCollector2/WebCollectorCluster/target/WebCollectorCluster-2.0.jar");
    Path crawldbPath = new Path(crawlPath, "crawldb");
    Path newdb = new Path(crawldbPath, "new");
    Path currentdb = new Path(crawldbPath, "current");

    FileSystem fs = FileSystem.get(conf);
    if (fs.exists(currentdb)) {
        FileInputFormat.addInputPath(job, currentdb);
    }//from  w w  w  .  j a  va2s  .co m

    if (fs.exists(newdb)) {
        fs.delete(newdb);
    }
    for (Path mergePath : mergePaths) {
        FileInputFormat.addInputPath(job, mergePath);
    }
    FileOutputFormat.setOutputPath(job, newdb);

    job.setInputFormatClass(SequenceFileInputFormat.class);

    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(CrawlDatum.class);

    job.setMapperClass(MergeMap.class);
    job.setReducerClass(MergeReduce.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(CrawlDatum.class);

    job.setOutputFormatClass(SequenceFileOutputFormat.class);
    job.waitForCompletion(true);

}

---

From source file:cn.edu.hfut.dmic.webcollector.fetcher.Fetcher.java

public static void fetch(Path crawlPath, String segmentName, Configuration conf) throws Exception {
    Path segmentPath = new Path(crawlPath, "segments/" + segmentName);
    Path generatePath = new Path(segmentPath, "generate");

    Job job = new Job(conf);
    job.setJobName("fetch " + crawlPath.toString());
    job.setJarByClass(Fetcher.class);

    job.setReducerClass(FetcherReducer.class);

    job.setInputFormatClass(SequenceFileInputFormat.class);
    job.setOutputFormatClass(FetcherOutputFormat.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(CrawlDatum.class);

    FileInputFormat.addInputPath(job, generatePath);
    FileOutputFormat.setOutputPath(job, segmentPath);

    job.waitForCompletion(true);/*  ww w.  j  a va2 s  . c o  m*/
}

---

From source file:cn.edu.hfut.dmic.webcollectorcluster.generator.Merge.java

public static Job createJob(Configuration conf, Path crawldb) throws IOException {

    Job job = new Job(conf);
    //job.setJarByClass(Merge.class);
    job.getConfiguration().set("mapred",
            "/home/hu/mygit/WebCollector2/WebCollectorCluster/target/WebCollectorCluster-2.0.jar");
    Path newdb = new Path(crawldb, "new");
    Path currentdb = new Path(crawldb, "current");

    FileSystem fs = crawldb.getFileSystem(CrawlerConfiguration.create());
    if (fs.exists(currentdb)) {
        FileInputFormat.addInputPath(job, currentdb);
    }/*from ww  w.ja va  2s .  com*/

    if (fs.exists(newdb)) {
        fs.delete(newdb);
    }

    FileOutputFormat.setOutputPath(job, newdb);

    job.setInputFormatClass(SequenceFileInputFormat.class);

    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(CrawlDatum.class);

    job.setMapperClass(MergeMap.class);
    job.setReducerClass(MergeReduce.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(CrawlDatum.class);

    job.setOutputFormatClass(SequenceFileOutputFormat.class);

    return job;
}

---

From source file:co.cask.cdap.data.stream.StreamInputFormatTest.java

License:Apache License

private void runMR(File inputDir, File outputDir, long startTime, long endTime, long splitSize, long ttl)
        throws Exception {

    Job job = Job.getInstance();
    Configuration conf = job.getConfiguration();

    StreamInputFormat.setTTL(conf, ttl);
    StreamInputFormat.setStreamPath(conf, inputDir.toURI());
    StreamInputFormat.setTimeRange(conf, startTime, endTime);
    StreamInputFormat.setMaxSplitSize(conf, splitSize);
    job.setInputFormatClass(TestStreamInputFormat.class);

    TextOutputFormat.setOutputPath(job, new Path(outputDir.toURI()));
    job.setOutputFormatClass(TextOutputFormat.class);

    job.setJarByClass(StreamInputFormatTest.class);
    job.setMapperClass(TokenizeMapper.class);
    job.setReducerClass(AggregateReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(LongWritable.class);
    job.setMapOutputValueClass(IntWritable.class);

    job.waitForCompletion(true);/*from w ww.  j a  v  a 2  s. c o m*/
}

---

From source file:co.cask.cdap.hbase.wd.RowKeyDistributorTestBase.java

License:Apache License

private void testMapReduceInternal(long origKeyPrefix, Scan scan, int numValues, int startWithValue,
        int seekIntervalMinValue, int seekIntervalMaxValue)
        throws IOException, InterruptedException, ClassNotFoundException {
    int valuesCountInSeekInterval = writeTestData(origKeyPrefix, numValues, startWithValue,
            seekIntervalMinValue, seekIntervalMaxValue);

    // Reading data
    Configuration conf = new Configuration(testingUtility.getConfiguration());
    conf.set("fs.defaultFS", "file:///");
    conf.set("fs.default.name", "file:///");
    conf.setInt("mapreduce.local.map.tasks.maximum", 16);
    conf.setInt("mapreduce.local.reduce.tasks.maximum", 16);
    Job job = Job.getInstance(conf, "testMapReduceInternal()-Job");
    TableMapReduceUtil.initTableMapperJob(TABLE_NAME, scan, RowCounterMapper.class,
            ImmutableBytesWritable.class, Result.class, job);

    // Substituting standard TableInputFormat which was set in TableMapReduceUtil.initTableMapperJob(...)
    job.setInputFormatClass(WdTableInputFormat.class);
    keyDistributor.addInfo(job.getConfiguration());

    job.setOutputFormatClass(NullOutputFormat.class);
    job.setNumReduceTasks(0);//w  w  w .  j  av a2s  .co  m

    boolean succeeded = job.waitForCompletion(true);
    Assert.assertTrue(succeeded);

    long mapInputRecords = job.getCounters().findCounter(RowCounterMapper.Counters.ROWS).getValue();
    Assert.assertEquals(valuesCountInSeekInterval, mapInputRecords);

    // Need to kill the job after completion, after it could leave MRAppMaster running not terminated.
    // Not sure what causing this, but maybe problem in MiniYarnCluster
    job.killJob();
}

---

From source file:co.cask.cdap.internal.app.runtime.batch.dataset.DataSetOutputFormat.java

License:Apache License

public static void setOutput(Job job, String outputDatasetName) {
    job.setOutputFormatClass(DataSetOutputFormat.class);
    job.getConfiguration().set(HCONF_ATTR_OUTPUT_DATASET, outputDatasetName);
}

---

From source file:co.cask.cdap.internal.app.runtime.batch.dataset.output.MultipleOutputs.java

License:Apache License

private static Job getNamedJob(JobContext context, String namedOutput) throws IOException {
    // The following trick leverages the instantiation of a record writer via
    // the job thus supporting arbitrary output formats.
    Job job = Job.getInstance(context.getConfiguration());
    job.setOutputFormatClass(getNamedOutputFormatClass(context, namedOutput));
    job.setOutputKeyClass(getNamedOutputKeyClass(context, namedOutput));
    job.setOutputValueClass(getNamedOutputValueClass(context, namedOutput));

    Configuration conf = job.getConfiguration();
    Map<String, String> namedConfigurations = ConfigurationUtil
            .getNamedConfigurations(context.getConfiguration(), computePrefixName(namedOutput));
    ConfigurationUtil.setAll(namedConfigurations, conf);
    return job;//  www. j  av  a 2s . c  o  m
}

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