Example usage for org.apache.hadoop.mapred JobConf setMapperClass

List of usage examples for org.apache.hadoop.mapred JobConf setMapperClass

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Introduction

In this page you can find the example usage for org.apache.hadoop.mapred JobConf setMapperClass.

Prototype

public void setMapperClass(Class<? extends Mapper> theClass)

Source Link

Document

Set the Mapper class for the job.

Usage

From source file:com.trace.hadoop.examples.Grep.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length < 3) {
        System.out.println("Grep <inDir> <outDir> <regex> [<group>]");
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }/*  w w  w  .j a v  a 2  s . c  o  m*/

    Path tempDir = new Path("grep-temp-" + Integer.toString(new Random().nextInt(Integer.MAX_VALUE)));

    JobConf grepJob = new JobConf(getConf(), Grep.class);

    try {

        grepJob.setJobName("grep-search");

        FileInputFormat.setInputPaths(grepJob, args[0]);

        grepJob.setMapperClass(RegexMapper.class);
        grepJob.set("mapred.mapper.regex", args[2]);
        if (args.length == 4)
            grepJob.set("mapred.mapper.regex.group", args[3]);

        grepJob.setCombinerClass(LongSumReducer.class);
        grepJob.setReducerClass(LongSumReducer.class);

        FileOutputFormat.setOutputPath(grepJob, tempDir);
        grepJob.setOutputFormat(SequenceFileOutputFormat.class);
        grepJob.setOutputKeyClass(Text.class);
        grepJob.setOutputValueClass(LongWritable.class);

        JobClient.runJob(grepJob);

        JobConf sortJob = new JobConf(getConf(), Grep.class);
        sortJob.setJobName("grep-sort");

        FileInputFormat.setInputPaths(sortJob, tempDir);
        sortJob.setInputFormat(SequenceFileInputFormat.class);

        sortJob.setMapperClass(InverseMapper.class);

        sortJob.setNumReduceTasks(1); // write a single file
        FileOutputFormat.setOutputPath(sortJob, new Path(args[1]));
        sortJob.setOutputKeyComparatorClass // sort by decreasing freq
        (LongWritable.DecreasingComparator.class);

        JobClient.runJob(sortJob);
    } finally {
        FileSystem.get(grepJob).delete(tempDir, true);
    }
    return 0;
}

From source file:com.unstruct.demo.WordCount.java

License:Apache License

/**
 * The main driver for word count map/reduce program.
 * Invoke this method to submit the map/reduce job.
 * @throws IOException When there is communication problems with the 
 *                     job tracker.//from  w w  w  .  j  a  va  2  s .c o m
 */
public int run(String[] args) throws Exception {

    JobConf conf = new JobConf(getConf(), WordCount.class);
    conf.setJobName("wordcount");

    // the keys are words (strings)
    conf.setOutputKeyClass(Text.class);
    // the values are counts (ints)
    conf.setOutputValueClass(IntWritable.class);

    conf.setMapperClass(MapClass.class);
    conf.setCombinerClass(Reduce.class);
    conf.setReducerClass(Reduce.class);

    conf.setInputFormat(TextInputFormat.class);
    conf.setOutputFormat(TextOutputFormat.class);

    List<String> other_args = new ArrayList<String>();
    for (int i = 0; i < args.length; ++i) {
        try {
            if ("-m".equals(args[i])) {
                conf.setNumMapTasks(Integer.parseInt(args[++i]));
            } else if ("-r".equals(args[i])) {
                conf.setNumReduceTasks(Integer.parseInt(args[++i]));
            } else {
                other_args.add(args[i]);
            }
        } catch (NumberFormatException except) {
            System.out.println("ERROR: Integer expected instead of " + args[i]);
            return printUsage();
        } catch (ArrayIndexOutOfBoundsException except) {
            System.out.println("ERROR: Required parameter missing from " + args[i - 1]);
            return printUsage();
        }
    }
    // Make sure there are exactly 2 parameters left.
    if (other_args.size() != 2) {
        System.out.println("ERROR: Wrong number of parameters: " + other_args.size() + " instead of 2.");
        return printUsage();
    }
    FileInputFormat.setInputPaths(conf, other_args.get(0));
    FileOutputFormat.setOutputPath(conf, new Path(other_args.get(1)));

    JobClient.runJob(conf);
    return 0;
}

From source file:com.vsii.ttxvn.crawling.DeleteFailedDataJob.java

License:Apache License

public int run(String[] args) throws IOException {
    if (args.length < 1) {
        System.err.println("Usage: DeleteFailedDataJob <crawldb>");
        return 1;
    }//from ww w  . j  a va2s  .c  o m

    String crawldb = args[0];

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    long start = System.currentTimeMillis();
    LOG.info("DeleteFailedDataJob: starting at " + sdf.format(start));

    Path tempDir = new Path(getConf().get("mapred.temp.dir", ".") + "/dedup-temp-"
            + Integer.toString(new Random().nextInt(Integer.MAX_VALUE)));

    JobConf job = new NutchJob(getConf());

    job.setJobName("DeleteFailedData on " + crawldb);

    FileInputFormat.addInputPath(job, new Path(crawldb, CrawlDb.CURRENT_NAME));
    job.setInputFormat(SequenceFileInputFormat.class);

    FileOutputFormat.setOutputPath(job, tempDir);
    job.setOutputFormat(SequenceFileOutputFormat.class);

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

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

    job.setMapperClass(DBFilter.class);
    job.setReducerClass(DedupReducer.class);

    try {
        RunningJob rj = JobClient.runJob(job);
        Group g = rj.getCounters().getGroup("DeleteFailedDataJobStatus");
        if (g != null) {
            long dups = g.getCounter("Documents marked as duplicate");
            LOG.info("DeleteFailedData: " + (int) dups + " documents marked as duplicates");
        }
    } catch (final Exception e) {
        LOG.error("DeleteFailedDataJob: " + StringUtils.stringifyException(e));
        return -1;
    }

    // merge with existing crawl db
    if (LOG.isInfoEnabled()) {
        LOG.info("DeleteFailedData: Updating status of duplicate urls into crawl db.");
    }

    Path dbPath = new Path(crawldb);
    JobConf mergeJob = CrawlDb.createJob(getConf(), dbPath);
    FileInputFormat.addInputPath(mergeJob, tempDir);
    mergeJob.setReducerClass(StatusUpdateReducer.class);

    try {
        JobClient.runJob(mergeJob);
    } catch (final Exception e) {
        LOG.error("DeleteFailedDataMergeJob: " + StringUtils.stringifyException(e));
        return -1;
    }

    CrawlDb.install(mergeJob, dbPath);

    // clean up
    FileSystem fs = FileSystem.get(getConf());
    fs.delete(tempDir, true);

    long end = System.currentTimeMillis();
    LOG.info("DeleteFailedData finished at " + sdf.format(end) + ", elapsed: "
            + TimingUtil.elapsedTime(start, end));

    return 0;
}

From source file:com.yahoo.semsearch.fastlinking.io.ExtractWikipediaAnchorText.java

License:Apache License

/**
 * Extracts redirects and the target for each.
 *
 * @param inputPath/* w  w w.j a va 2s . co  m*/
 * @param outputPath
 * @throws IOException
 */
private void task0(String inputPath, String outputPath) throws IOException {
    LOG.info("Extracting redirects (phase 0)...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(
            String.format("ExtractWikipediaAnchorText:phase0[input: %s, output: %s]", inputPath, outputPath));

    conf.setNumReduceTasks(1);

    FileInputFormat.addInputPath(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputFormat(SequenceFileOutputFormat.class);

    conf.setMapOutputKeyClass(Text.class);
    conf.setMapOutputValueClass(Text.class);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(Text.class);

    conf.setMapperClass(MyMapper0.class);
    conf.setReducerClass(IdentityReducer.class);

    JobClient.runJob(conf);
}

From source file:com.yahoo.semsearch.fastlinking.io.ExtractWikipediaAnchorText.java

License:Apache License

/**
 * Maps from Wikipedia article to (srcID, (targetID, anchor).
 *
 * @param inputPath//from   w  w w .  j  av  a2 s  . c  o  m
 * @param outputPath
 * @throws IOException
 */
private void task1(String inputPath, String outputPath) throws IOException {
    LOG.info("Extracting anchor text (phase 1)...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(
            String.format("ExtractWikipediaAnchorText:phase1[input: %s, output: %s]", inputPath, outputPath));

    // 10 reducers is reasonable.
    conf.setNumReduceTasks(10);

    FileInputFormat.addInputPath(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputFormat(SequenceFileOutputFormat.class);

    conf.setMapOutputKeyClass(PairOfStringInt.class);
    conf.setMapOutputValueClass(PairOfStrings.class);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(PairOfStrings.class);

    conf.setMapperClass(MyMapper1.class);
    conf.setReducerClass(MyReducer1.class);
    conf.setPartitionerClass(MyPartitioner1.class);

    // Delete the output directory if it exists already.
    FileSystem.get(conf).delete(new Path(outputPath), true);

    JobClient.runJob(conf);
}

From source file:com.yahoo.semsearch.fastlinking.io.ExtractWikipediaAnchorText.java

License:Apache License

/**
 *
 * Maps from (srcID, (targetID, anchor) to (targetID, (anchor, count)).
 *
 * @param inputPath//from w w  w  .  j  ava2s  .  c o  m
 * @param outputPath
 * @throws IOException
 */
private void task2(String inputPath, String outputPath, String redirPath) throws IOException {
    LOG.info("Extracting anchor text (phase 2)...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);
    Random r = new Random();
    //String tmpOutput = "tmp-" + this.getClass().getCanonicalName() + "-" + r.nextInt(10000);
    //LOG.info( "intermediate folder for merge " + tmpOutput );

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(
            String.format("ExtractWikipediaAnchorText:phase2[input: %s, output: %s]", inputPath, outputPath));

    // Gathers everything together for convenience; feasible for Wikipedia.
    conf.setNumReduceTasks(1);

    try {
        DistributedCache.addCacheFile(new URI(redirPath + "/part-00000" + "#" + "redirs.dat"), conf);
        DistributedCache.createSymlink(conf);
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }

    FileInputFormat.addInputPath(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));
    //FileOutputFormat.setOutputPath(conf, new Path(tmpOutput));

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputFormat(MapFileOutputFormat.class);
    // conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapOutputKeyClass(Text.class);
    conf.setMapOutputValueClass(Text.class);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(HMapSIW.class);

    conf.setMapperClass(MyMapper2.class);
    conf.setReducerClass(MyReducer2.class);

    // Delete the output directory if it exists already.
    FileSystem.get(conf).delete(new Path(outputPath), true);

    JobClient.runJob(conf);
    // Clean up intermediate data.
    FileSystem.get(conf).delete(new Path(inputPath), true);

    /*
    //merge
    String finalO = outputPath+"/part-00000/data";
    FileSystem.get(conf).mkdirs( new Path( outputPath + "part-00000") );
    getMergeInHdfs( tmpOutput, finalO, conf );
    FileSystem.get(conf).delete(new Path(tmpOutput), true);
    */
}

From source file:com.yahoo.semsearch.fastlinking.io.ExtractWikipediaAnchorText.java

License:Apache License

/**
 * Extracts CF for each found anchor./*from w  w  w  .j  a  v a 2 s .  c o m*/
 *
 * @param inputPath
 * @param mapPath
 * @param outputPath
 * @throws IOException
 */
private void task3(String inputPath, String mapPath, String outputPath) throws IOException {
    LOG.info("Extracting anchor text (phase 3)...");
    LOG.info(" - input:   " + inputPath);
    LOG.info(" - output:  " + outputPath);
    LOG.info(" - mapping: " + mapPath);

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(
            String.format("ExtractWikipediaAnchorText:phase3[input: %s, output: %s]", inputPath, outputPath));

    conf.setNumReduceTasks(1);
    String location = "map.dat";

    try {
        DistributedCache.addCacheFile(new URI(mapPath + "/part-00000/data" + "#" + location), conf);
        //DistributedCache.addCacheFile(new URI(mapPath + "/singleentitymap.data" + "#" + location), conf);
        DistributedCache.createSymlink(conf);
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }

    FileInputFormat.addInputPath(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputFormat(MapFileOutputFormat.class);
    // conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapOutputKeyClass(Text.class);
    conf.setMapOutputValueClass(IntWritable.class);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);

    conf.setMapperClass(MyMapper3.class);
    conf.setCombinerClass(MyReducer3.class);
    conf.setReducerClass(MyReducer3.class);

    JobClient.runJob(conf);
}

From source file:com.yahoo.semsearch.fastlinking.io.ExtractWikipediaAnchorText.java

License:Apache License

/**
 * Maps from (targetID, (anchor, count)) to (anchor, (targetID, count)).
 *
 * @param inputPath/*w w  w.  j  a va  2 s  . c o m*/
 * @param outputPath
 * @throws IOException
 */
private void task4(String inputPath, String outputPath) throws IOException {
    LOG.info("Extracting anchor text (phase 4)...");
    LOG.info(" - input:   " + inputPath);
    LOG.info(" - output:  " + outputPath);

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(
            String.format("ExtractWikipediaAnchorText:phase4[input: %s, output: %s]", inputPath, outputPath));

    conf.setNumReduceTasks(1);

    //FileInputFormat.addInputPath(conf, new Path(inputPath + "/part-00000/data"));
    FileInputFormat.addInputPath(conf, new Path(inputPath + "/part-*/data"));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputFormat(MapFileOutputFormat.class);

    conf.setMapOutputKeyClass(Text.class);
    conf.setMapOutputValueClass(HMapSIW.class);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(HMapSIW.class);

    conf.setMapperClass(MyMapper4.class);
    conf.setReducerClass(MyReducer4.class);

    JobClient.runJob(conf);
}

From source file:com.yolodata.tbana.hadoop.mapred.csv.CSVInputFormatTest.java

License:Open Source License

public int run(String[] args) throws Exception {

    getConf().set(CSVLineRecordReader.FORMAT_DELIMITER, "\"");
    getConf().set(CSVLineRecordReader.FORMAT_SEPARATOR, ",");
    getConf().setInt(CSVNLineInputFormat.LINES_PER_MAP, 40000);
    getConf().setBoolean(CSVLineRecordReader.IS_ZIPFILE, false);

    JobConf jobConf = new JobConf(getConf());

    jobConf.setJarByClass(CSVTestRunner.class);
    jobConf.setNumReduceTasks(0);/*from   w w w . j  a  v  a  2 s . com*/
    jobConf.setMapperClass(TestMapper.class);

    jobConf.setInputFormat(CSVNLineInputFormat.class);
    jobConf.setOutputKeyClass(NullWritable.class);
    jobConf.setOutputValueClass(Text.class);

    CSVNLineInputFormat.setInputPaths(jobConf, new Path(args[0]));
    TextOutputFormat.setOutputPath(jobConf, new Path(args[1]));

    JobClient.runJob(jobConf);

    return 0;
}

From source file:com.yolodata.tbana.hadoop.mapred.shuttl.TestMapper.java

License:Open Source License

public int run(String[] args) throws Exception {
    JobConf jobConf = new JobConf(TestConfigurations.getConfigurationWithShuttlSearch());

    jobConf.setJarByClass(ShuttlTestJob.class);
    jobConf.setNumReduceTasks(1);/*from www  . ja v  a 2s.c  om*/
    jobConf.setMapperClass(TestMapper.class);
    jobConf.setReducerClass(TestReducer.class);

    jobConf.setInputFormat(ShuttlCSVInputFormat.class);
    jobConf.setOutputKeyClass(LongWritable.class);
    jobConf.setOutputValueClass(Text.class);

    ShuttlCSVInputFormat.addInputPath(jobConf, new Path(args[0]));
    TextOutputFormat.setOutputPath(jobConf, new Path(args[1]));

    JobClient.runJob(jobConf);

    return 0;
}