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

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

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Introduction

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

Prototype

public void setOutputValueClass(Class<?> theClass)

Source Link

Document

Set the value class for job outputs.

Usage

From source file:edu.umd.cloud9.collection.trec.NumberTrecDocuments.java

License:Apache License

/**
 * Runs this tool.//from  w  w w .ja  v  a2 s.co  m
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String inputPath = args[0];
    String outputPath = args[1];
    String outputFile = args[2];

    LOG.info("Tool: " + NumberTrecDocuments.class.getCanonicalName());
    LOG.info(" - Input path: " + inputPath);
    LOG.info(" - Output path: " + outputPath);
    LOG.info(" - Output file: " + outputFile);

    JobConf conf = new JobConf(getConf(), NumberTrecDocuments.class);
    conf.setJobName(NumberTrecDocuments.class.getSimpleName());

    conf.setNumMapTasks(100); // Arbitrary number; doesn't matter.
    conf.setNumReduceTasks(1);

    FileInputFormat.setInputPaths(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));
    FileOutputFormat.setCompressOutput(conf, false);

    conf.setInputFormat(TrecDocumentInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);
    conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(MyReducer.class);

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

    JobClient.runJob(conf);

    String input = outputPath + (outputPath.endsWith("/") ? "" : "/") + "/part-00000";
    TrecDocnoMapping.writeMappingData(new Path(input), new Path(outputFile), FileSystem.get(getConf()));

    return 0;
}

From source file:edu.umd.cloud9.collection.trecweb.NumberTrecWebDocuments.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 4) {
        System.out.println("usage: [input] [output-dir] [output-file] [num-mappers]");
        System.exit(-1);/*from  w w  w  .j a  v a  2 s . c  om*/
    }

    String inputPath = args[0];
    String outputPath = args[1];
    String outputFile = args[2];
    int mapTasks = Integer.parseInt(args[3]);

    LOG.info("Tool name: " + NumberTrecWebDocuments.class.getCanonicalName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - output file: " + outputFile);
    LOG.info(" - number of mappers: " + mapTasks);

    JobConf conf = new JobConf(getConf(), NumberTrecWebDocuments.class);
    conf.setJobName(NumberTrecWebDocuments.class.getSimpleName());

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(1);

    FileInputFormat.setInputPaths(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));
    FileOutputFormat.setCompressOutput(conf, false);

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);
    conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(MyReducer.class);

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

    JobClient.runJob(conf);

    writeMappingData(new Path(outputPath + "/part-00000"), new Path(outputFile), FileSystem.get(conf));

    return 0;
}

From source file:edu.umd.cloud9.collection.trecweb.RepackGov2Documents.java

License:Apache License

/**
 * Runs this tool.//ww w  .j av a  2 s  . co m
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String basePath = args[0];
    String outputPath = args[1];
    String compressionType = args[2];

    if (!compressionType.equals("block") && !compressionType.equals("record")
            && !compressionType.equals("none")) {
        System.err.println("Error: \"" + compressionType + "\" unknown compression type!");
        System.exit(-1);
    }

    // this is the default block size
    int blocksize = 1000000;

    JobConf conf = new JobConf(RepackGov2Documents.class);
    conf.setJobName("RepackGov2Documents");

    sLogger.info("Tool name: RepackGov2Documents");
    sLogger.info(" - base path: " + basePath);
    sLogger.info(" - output path: " + outputPath);
    sLogger.info(" - compression type: " + compressionType);

    if (compressionType.equals("block")) {
        sLogger.info(" - block size: " + blocksize);
    }

    int mapTasks = 10;

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(500);

    // 272
    for (int i = 0; i <= 272; i++) {
        String path = basePath + "/GX";
        String indexNum = Integer.toString(i);
        if (indexNum.length() == 1) {
            path += "00";
        }
        if (indexNum.length() == 2) {
            path += "0";
        }
        path += indexNum;
        FileInputFormat.addInputPath(conf, new Path(path));
    }

    SequenceFileOutputFormat.setOutputPath(conf, new Path(outputPath));

    if (compressionType.equals("none")) {
        SequenceFileOutputFormat.setCompressOutput(conf, false);
    } else {
        SequenceFileOutputFormat.setCompressOutput(conf, true);

        if (compressionType.equals("record")) {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.RECORD);
        } else {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.BLOCK);
            conf.setInt("io.seqfile.compress.blocksize", blocksize);
        }
    }

    conf.setInputFormat(TrecWebDocumentInputFormat.class);
    conf.setOutputFormat(SequenceFileOutputFormat.class);
    conf.setOutputKeyClass(LongWritable.class);
    conf.setOutputValueClass(TrecWebDocument.class);

    conf.setMapperClass(MyMapper.class);

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

    JobClient.runJob(conf);

    return 0;
}

From source file:edu.umd.cloud9.collection.trecweb.RepackWt10gDocuments.java

License:Apache License

/**
 * Runs this tool./*from  w  ww  .jav  a  2s. c  om*/
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String basePath = args[0];
    String outputPath = args[1];
    String compressionType = args[2];

    if (!compressionType.equals("block") && !compressionType.equals("record")
            && !compressionType.equals("none")) {
        System.err.println("Error: \"" + compressionType + "\" unknown compression type!");
        System.exit(-1);
    }

    // this is the default block size
    int blocksize = 1000000;

    JobConf conf = new JobConf(RepackWt10gDocuments.class);
    conf.setJobName("RepackWt10gDocuments");

    sLogger.info("Tool name: RepackWt10gDocuments");
    sLogger.info(" - base path: " + basePath);
    sLogger.info(" - output path: " + outputPath);
    sLogger.info(" - compression type: " + compressionType);

    if (compressionType.equals("block")) {
        sLogger.info(" - block size: " + blocksize);
    }

    int mapTasks = 10;

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(50);

    for (int i = 1; i <= 104; i++) {
        String path = basePath + "/WTX";
        String indexNum = Integer.toString(i);
        if (indexNum.length() == 1) {
            path += "00";
        }
        if (indexNum.length() == 2) {
            path += "0";
        }
        path += indexNum;
        FileInputFormat.addInputPath(conf, new Path(path));
    }

    SequenceFileOutputFormat.setOutputPath(conf, new Path(outputPath));

    if (compressionType.equals("none")) {
        SequenceFileOutputFormat.setCompressOutput(conf, false);
    } else {
        SequenceFileOutputFormat.setCompressOutput(conf, true);

        if (compressionType.equals("record")) {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.RECORD);
        } else {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.BLOCK);
            conf.setInt("io.seqfile.compress.blocksize", blocksize);
        }
    }

    conf.setInputFormat(TrecWebDocumentInputFormat.class);
    conf.setOutputFormat(SequenceFileOutputFormat.class);
    conf.setOutputKeyClass(LongWritable.class);
    conf.setOutputValueClass(TrecWebDocument.class);

    conf.setMapperClass(MyMapper.class);

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

    JobClient.runJob(conf);

    return 0;
}

From source file:edu.umd.cloud9.collection.wikipedia.BuildWikipediaDocnoMapping.java

License:Apache License

@SuppressWarnings("static-access")
@Override/*  ww w  .jav a2 s.  c  o m*/
public int run(String[] args) throws Exception {
    Options options = new Options();
    options.addOption(
            OptionBuilder.withArgName("path").hasArg().withDescription("XML dump file").create(INPUT_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("tmp output directory")
            .create(OUTPUT_PATH_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output file")
            .create(OUTPUT_FILE_OPTION));
    options.addOption(OptionBuilder.withArgName("en|sv|de|cs|es|zh|ar|tr").hasArg()
            .withDescription("two-letter language code").create(LANGUAGE_OPTION));
    options.addOption(KEEP_ALL_OPTION, false, "keep all pages");

    CommandLine cmdline;
    CommandLineParser parser = new GnuParser();
    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        return -1;
    }

    if (!cmdline.hasOption(INPUT_OPTION) || !cmdline.hasOption(OUTPUT_PATH_OPTION)
            || !cmdline.hasOption(OUTPUT_FILE_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    String language = null;
    if (cmdline.hasOption(LANGUAGE_OPTION)) {
        language = cmdline.getOptionValue(LANGUAGE_OPTION);
        if (language.length() != 2) {
            System.err.println("Error: \"" + language + "\" unknown language!");
            return -1;
        }
    }

    String inputPath = cmdline.getOptionValue(INPUT_OPTION);
    String outputPath = cmdline.getOptionValue(OUTPUT_PATH_OPTION);
    String outputFile = cmdline.getOptionValue(OUTPUT_FILE_OPTION);
    boolean keepAll = cmdline.hasOption(KEEP_ALL_OPTION);

    LOG.info("Tool name: " + this.getClass().getName());
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - output file: " + outputFile);
    LOG.info(" - keep all pages: " + keepAll);
    LOG.info(" - language: " + language);

    JobConf conf = new JobConf(getConf(), BuildWikipediaDocnoMapping.class);
    conf.setJobName(String.format("BuildWikipediaDocnoMapping[%s: %s, %s: %s, %s: %s]", INPUT_OPTION, inputPath,
            OUTPUT_FILE_OPTION, outputFile, LANGUAGE_OPTION, language));

    conf.setBoolean(KEEP_ALL_OPTION, keepAll);
    if (language != null) {
        conf.set("wiki.language", language);
    }
    conf.setNumReduceTasks(1);

    FileInputFormat.setInputPaths(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));
    FileOutputFormat.setCompressOutput(conf, false);

    conf.setInputFormat(WikipediaPageInputFormat.class);
    conf.setOutputKeyClass(IntWritable.class);
    conf.setOutputValueClass(IntWritable.class);
    conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(MyReducer.class);

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

    RunningJob job = JobClient.runJob(conf);
    Counters c = job.getCounters();
    long cnt = keepAll ? c.getCounter(PageTypes.TOTAL) : c.getCounter(PageTypes.ARTICLE);

    WikipediaDocnoMapping.writeDocnoMappingData(FileSystem.get(conf), outputPath + "/part-00000", (int) cnt,
            outputFile);

    return 0;
}

From source file:edu.umd.cloud9.collection.wikipedia.BuildWikipediaForwardIndex.java

License:Apache License

@SuppressWarnings("static-access")
@Override/*from  w w  w  .ja va2s. c o m*/
public int run(String[] args) throws Exception {
    Options options = new Options();
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input").create(INPUT_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("tmp output directory")
            .create(OUTPUT_OPTION));
    options.addOption(
            OptionBuilder.withArgName("path").hasArg().withDescription("index file").create(INDEX_FILE_OPTION));
    options.addOption(OptionBuilder.withArgName("en|sv|de|cs|es|zh|ar|tr").hasArg()
            .withDescription("two-letter language code").create(LANGUAGE_OPTION));

    CommandLine cmdline;
    CommandLineParser parser = new GnuParser();
    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        return -1;
    }

    if (!cmdline.hasOption(INPUT_OPTION) || !cmdline.hasOption(OUTPUT_OPTION)
            || !cmdline.hasOption(INDEX_FILE_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    Path inputPath = new Path(cmdline.getOptionValue(INPUT_OPTION));
    String outputPath = cmdline.getOptionValue(OUTPUT_OPTION);
    String indexFile = cmdline.getOptionValue(INDEX_FILE_OPTION);

    if (!inputPath.isAbsolute()) {
        System.err.println("Error: " + INPUT_OPTION + " must be an absolute path!");
        return -1;
    }

    String language = null;
    if (cmdline.hasOption(LANGUAGE_OPTION)) {
        language = cmdline.getOptionValue(LANGUAGE_OPTION);
        if (language.length() != 2) {
            System.err.println("Error: \"" + language + "\" unknown language!");
            return -1;
        }
    }

    JobConf conf = new JobConf(getConf(), BuildWikipediaForwardIndex.class);
    FileSystem fs = FileSystem.get(conf);

    LOG.info("Tool name: " + this.getClass().getName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - index file: " + indexFile);
    LOG.info("Note: This tool only works on block-compressed SequenceFiles!");
    LOG.info(" - language: " + language);

    conf.setJobName(String.format("BuildWikipediaForwardIndex[%s: %s, %s: %s, %s: %s]", INPUT_OPTION, inputPath,
            INDEX_FILE_OPTION, indexFile, LANGUAGE_OPTION, language));

    conf.setNumReduceTasks(1);

    FileInputFormat.setInputPaths(conf, inputPath);
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));
    FileOutputFormat.setCompressOutput(conf, false);

    if (language != null) {
        conf.set("wiki.language", language);
    }

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

    conf.setMapRunnerClass(MyMapRunner.class);
    conf.setReducerClass(IdentityReducer.class);

    // delete the output directory if it exists already
    fs.delete(new Path(outputPath), true);

    RunningJob job = JobClient.runJob(conf);

    Counters counters = job.getCounters();
    int blocks = (int) counters.getCounter(Blocks.Total);

    LOG.info("number of blocks: " + blocks);

    LOG.info("Writing index file...");
    LineReader reader = new LineReader(fs.open(new Path(outputPath + "/part-00000")));
    FSDataOutputStream out = fs.create(new Path(indexFile), true);

    out.writeUTF("edu.umd.cloud9.collection.wikipedia.WikipediaForwardIndex");
    out.writeUTF(inputPath.toString());
    out.writeInt(blocks);

    int cnt = 0;
    Text line = new Text();
    while (reader.readLine(line) > 0) {
        String[] arr = line.toString().split("\\s+");

        int docno = Integer.parseInt(arr[0]);
        int offset = Integer.parseInt(arr[1]);
        short fileno = Short.parseShort(arr[2]);

        out.writeInt(docno);
        out.writeInt(offset);
        out.writeShort(fileno);

        cnt++;

        if (cnt % 100000 == 0) {
            LOG.info(cnt + " blocks written");
        }
    }

    reader.close();
    out.close();

    if (cnt != blocks) {
        throw new RuntimeException("Error: mismatch in block count!");
    }

    return 0;
}

From source file:edu.umd.cloud9.collection.wikipedia.BuildWikipediaLinkGraph.java

License:Apache License

private void task1(String inputPath, String outputPath, int partitions) throws IOException {
    LOG.info("Exracting edges...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), BuildWikipediaLinkGraph.class);
    conf.setJobName(String.format("BuildWikipediaLinkGraph:Edges[input: %s, output: %s, num_partitions: %d]",
            inputPath, outputPath, partitions));

    conf.setNumReduceTasks(partitions);/*from  w  ww.j ava2 s  .co m*/

    SequenceFileInputFormat.addInputPath(conf, new Path(inputPath));
    TextOutputFormat.setOutputPath(conf, new Path(outputPath));

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

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

    conf.setOutputKeyClass(IntWritable.class);
    conf.setOutputValueClass(IntWritable.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:edu.umd.cloud9.collection.wikipedia.BuildWikipediaLinkGraph.java

License:Apache License

private void task2(String inputPath, String outputPath, int partitions) throws IOException {
    LOG.info("Building adjacency lists...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), BuildWikipediaLinkGraph.class);
    conf.setJobName(//  ww  w  .  j a  v  a  2s  . c om
            String.format("BuildWikipediaLinkGraph:AdjacencyList[input: %s, output: %s, num_partitions: %d]",
                    inputPath, outputPath, partitions));

    conf.setNumReduceTasks(partitions);

    TextInputFormat.addInputPath(conf, new Path(inputPath));
    TextOutputFormat.setOutputPath(conf, new Path(outputPath));

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

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

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

From source file:edu.umd.cloud9.collection.wikipedia.graph.ExtractWikipediaAnchorText.java

License:Apache License

private void task1(String inputPath, String outputPath) throws IOException {
    LOG.info("Exracting anchor text (phase 1)...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(//w ww . j  a  v a 2 s  .  com
            String.format("ExtractWikipediaAnchorText:phase1[input: %s, output: %s]", inputPath, outputPath));

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

    SequenceFileInputFormat.addInputPath(conf, new Path(inputPath));
    TextOutputFormat.setOutputPath(conf, new Path(outputPath));

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

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

    conf.setOutputKeyClass(IntWritable.class);
    conf.setOutputValueClass(PairOfIntString.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:edu.umd.cloud9.collection.wikipedia.graph.ExtractWikipediaAnchorText.java

License:Apache License

private void task2(String inputPath, String outputPath) throws IOException {
    LOG.info("Exracting anchor text (phase 2)...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), ExtractWikipediaAnchorText.class);
    conf.setJobName(/*  w w  w  .java 2 s.c  o m*/
            String.format("ExtractWikipediaAnchorText:phase2[input: %s, output: %s]", inputPath, outputPath));

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

    TextInputFormat.addInputPath(conf, new Path(inputPath));
    TextOutputFormat.setOutputPath(conf, new Path(outputPath));

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

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

    conf.setOutputKeyClass(IntWritable.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);
}