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

List of usage examples for org.apache.hadoop.mapreduce Job setMapOutputKeyClass

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Introduction

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

Prototype

public void setMapOutputKeyClass(Class<?> theClass) throws IllegalStateException

Source Link

Document

Set the key class for the map output data.

Usage

From source file:com.antbrains.crf.hadoop.CalcFeatureWeights.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    if (otherArgs.length != 3 && otherArgs.length != 4) {
        System.err.println("CalcFeatureWeights <inDir> <tmpDir> <outDir> [startStep]");
        System.exit(-1);/*from w  ww .  ja  v a2  s.c om*/
    }
    int startStep = 1;
    if (otherArgs.length == 4) {
        startStep = Integer.valueOf(otherArgs[otherArgs.length - 1]);
    }
    FileSystem fs = FileSystem.get(conf);
    if (startStep <= 1) {
        System.out.println("calc");
        fs.delete(new Path(otherArgs[1]), true);
        Job job = new Job(conf, CalcFeatureWeights.class.getSimpleName());
        job.setNumReduceTasks(1);
        job.setJarByClass(CalcFeatureWeights.class);
        job.setMapperClass(CalcFeatureMapper.class);
        job.setReducerClass(CalcFeatureReducer.class);

        job.setOutputFormatClass(SequenceFileOutputFormat.class);

        job.setInputFormatClass(SequenceFileInputFormat.class);

        job.setMapOutputKeyClass(IntWritable.class);
        job.setMapOutputValueClass(MyKey.class);

        job.setOutputKeyClass(MyKey.class);
        job.setOutputValueClass(MyValue.class);
        FileInputFormat.setInputPaths(job, new Path(otherArgs[0]));

        FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));

        boolean res = job.waitForCompletion(true);
        if (!res) {
            System.err.println("step1 failed");
            return;
        }
    }

    if (startStep <= 2)
    // sort
    {
        fs.delete(new Path(otherArgs[2]), true);
        System.out.println("sort");
        Job job = new Job(conf, CalcFeatureWeights.class.getSimpleName());

        job.setNumReduceTasks(1);
        job.setJarByClass(CalcFeatureWeights.class);
        job.setMapperClass(IdentityMapper.class);
        job.setReducerClass(IdentityReducer.class);

        job.setOutputFormatClass(SequenceFileOutputFormat.class);

        job.setInputFormatClass(SequenceFileInputFormat.class);

        job.setMapOutputKeyClass(MyKey.class);
        job.setMapOutputValueClass(MyValue.class);
        job.setOutputKeyClass(MyKey.class);
        job.setOutputValueClass(MyValue.class);

        FileInputFormat.setInputPaths(job, new Path(otherArgs[1]));

        FileOutputFormat.setOutputPath(job, new Path(otherArgs[2]));

        boolean res = job.waitForCompletion(true);
        if (!res) {
            System.err.println("step2 failed");
            return;
        }
    }

}

From source file:com.asakusafw.runtime.mapreduce.simple.SimpleJobRunnerTest.java

License:Apache License

/**
 * Test for map-reduce job.//from   w  w w .  j av a2  s  .co  m
 * @throws Exception if failed
 */
@Test
public void map_reduce() throws Exception {
    Job job = newJob();
    job.setInputFormatClass(TextInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);

    job.setMapperClass(WordCountMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(LongWritable.class);

    job.setSortComparatorClass(Text.Comparator.class);
    job.setGroupingComparatorClass(Text.Comparator.class);

    job.setReducerClass(WordCountReducer.class);
    job.setNumReduceTasks(1);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(LongWritable.class);

    File inputDir = folder.newFolder();
    File inputFile = new File(inputDir, "input.txt");
    write(inputFile, new String[] { "a b c d", "a a b c", "c", });

    File outputDir = folder.newFolder();
    outputDir.delete();

    FileInputFormat.setInputPaths(job, new Path(inputFile.toURI()));
    FileOutputFormat.setOutputPath(job, new Path(outputDir.toURI()));
    assertThat(new SimpleJobRunner().run(job), is(true));
    assertThat(toMap(read(outputDir)), is(map(new String[] { "a", "3", "b", "2", "c", "3", "d", "1", })));
}

From source file:com.asakusafw.runtime.stage.AbstractStageClient.java

License:Apache License

@SuppressWarnings("rawtypes")
private void configureShuffle(Job job, VariableTable variables) {
    Class<? extends Reducer> reducer = getReducerClassOrNull();
    if (reducer != null) {
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("Reducer: {0}", reducer.getName())); //$NON-NLS-1$
        }//from ww  w.  ja  va  2s  .c o  m
        job.setReducerClass(reducer);
    } else {
        if (LOG.isDebugEnabled()) {
            LOG.debug("Reducer: N/A"); //$NON-NLS-1$
        }
        job.setNumReduceTasks(0);
        return;
    }

    Class<? extends Writable> outputKeyClass = or(getShuffleKeyClassOrNull(), NullWritable.class);
    Class<? extends Writable> outputValueClass = or(getShuffleValueClassOrNull(), NullWritable.class);
    if (LOG.isDebugEnabled()) {
        LOG.debug(MessageFormat.format("Shuffle: key={0}, value={1}", //$NON-NLS-1$
                outputKeyClass.getName(), outputValueClass.getName()));
    }
    job.setMapOutputKeyClass(outputKeyClass);
    job.setMapOutputValueClass(outputValueClass);

    Class<? extends Reducer> combiner = getCombinerClassOrNull();
    if (combiner != null) {
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("Combiner: {0}", combiner.getName())); //$NON-NLS-1$
        }
        job.setCombinerClass(combiner);
    } else {
        if (LOG.isDebugEnabled()) {
            LOG.debug("Combiner: N/A"); //$NON-NLS-1$
        }
    }

    Class<? extends Partitioner> partitioner = getPartitionerClassOrNull();
    if (partitioner != null) {
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("Partitioner: {0}", partitioner.getName())); //$NON-NLS-1$
        }
        job.setPartitionerClass(partitioner);
    } else {
        if (LOG.isDebugEnabled()) {
            LOG.debug("Partitioner: DEFAULT"); //$NON-NLS-1$
        }
    }

    Class<? extends RawComparator> groupingComparator = getGroupingComparatorClassOrNull();
    if (groupingComparator != null) {
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("GroupingComparator: {0}", groupingComparator.getName())); //$NON-NLS-1$
        }
        job.setGroupingComparatorClass(groupingComparator);
    } else {
        if (LOG.isDebugEnabled()) {
            LOG.debug("GroupingComparator: DEFAULT"); //$NON-NLS-1$
        }
    }

    Class<? extends RawComparator> sortComparator = getSortComparatorClassOrNull();
    if (sortComparator != null) {
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("SortComparator: {0}", sortComparator.getName())); //$NON-NLS-1$
        }
        job.setSortComparatorClass(sortComparator);
    } else {
        if (LOG.isDebugEnabled()) {
            LOG.debug("SortComparator: DEFAULT"); //$NON-NLS-1$
        }
    }
}

From source file:com.asakusafw.thundergate.runtime.cache.mapreduce.CacheBuildClient.java

License:Apache License

private void updateMerge() throws IOException, InterruptedException {
    Job job = newJob();

    List<StageInput> inputList = new ArrayList<>();
    inputList.add(new StageInput(storage.getHeadContents("*").toString(), TemporaryInputFormat.class,
            MergeJoinBaseMapper.class));
    inputList.add(new StageInput(storage.getPatchContents("*").toString(), TemporaryInputFormat.class,
            MergeJoinPatchMapper.class));
    StageInputDriver.set(job, inputList);
    job.setInputFormatClass(StageInputFormat.class);
    job.setMapperClass(StageInputMapper.class);
    job.setMapOutputKeyClass(PatchApplyKey.class);
    job.setMapOutputValueClass(modelClass);

    // combiner may have no effect in normal cases
    job.setReducerClass(MergeJoinReducer.class);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(modelClass);
    job.setPartitionerClass(PatchApplyKey.Partitioner.class);
    job.setSortComparatorClass(PatchApplyKey.SortComparator.class);
    job.setGroupingComparatorClass(PatchApplyKey.GroupComparator.class);

    TemporaryOutputFormat.setOutputPath(job, getNextDirectory());
    job.setOutputFormatClass(TemporaryOutputFormat.class);
    job.getConfiguration().setClass("mapred.output.committer.class", LegacyBridgeOutputCommitter.class,
            org.apache.hadoop.mapred.OutputCommitter.class);

    LOG.info(MessageFormat.format("applying patch (merge join): {0} / {1} -> {2}",
            storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
    try {//from w  w  w .  ja v  a  2s .co m
        boolean succeed = job.waitForCompletion(true);
        LOG.info(MessageFormat.format("applied patch (merge join): succeed={0}, {1} / {2} -> {3}", succeed,
                storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
        if (succeed == false) {
            throw new IOException(MessageFormat.format("failed to apply patch (merge join): {0} / {1} -> {2}",
                    storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
        }
    } catch (ClassNotFoundException e) {
        throw new IOException(e);
    }
    putMeta();
}

From source file:com.asakusafw.thundergate.runtime.cache.mapreduce.CacheBuildClient.java

License:Apache License

private void updateTable() throws IOException, InterruptedException {
    Job job = newJob();
    List<StageInput> inputList = new ArrayList<>();
    inputList.add(new StageInput(storage.getHeadContents("*").toString(), TemporaryInputFormat.class,
            TableJoinBaseMapper.class));
    inputList.add(new StageInput(storage.getPatchContents("*").toString(), TemporaryInputFormat.class,
            TableJoinPatchMapper.class));
    StageInputDriver.set(job, inputList);
    StageResourceDriver.add(job, storage.getPatchContents("*").toString(), TableJoinBaseMapper.RESOURCE_KEY);
    job.setInputFormatClass(StageInputFormat.class);
    job.setMapperClass(StageInputMapper.class);
    job.setMapOutputKeyClass(NullWritable.class);
    job.setMapOutputValueClass(modelClass);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(modelClass);

    TemporaryOutputFormat.setOutputPath(job, getNextDirectory());
    job.setOutputFormatClass(TemporaryOutputFormat.class);
    job.getConfiguration().setClass("mapred.output.committer.class", LegacyBridgeOutputCommitter.class,
            org.apache.hadoop.mapred.OutputCommitter.class);

    job.setNumReduceTasks(0);/*from   ww w  .  j  av a  2s . c om*/

    LOG.info(MessageFormat.format("applying patch (table join): {0} / {1} -> {2}",
            storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
    try {
        boolean succeed = job.waitForCompletion(true);
        LOG.info(MessageFormat.format("applied patch (table join): succeed={0}, {1} / {2} -> {3}", succeed,
                storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
        if (succeed == false) {
            throw new IOException(MessageFormat.format("failed to apply patch (table join): {0} / {1} -> {2}",
                    storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
        }
    } catch (ClassNotFoundException e) {
        throw new IOException(e);
    }
    putMeta();
}

From source file:com.asakusafw.thundergate.runtime.cache.mapreduce.CacheBuildClient.java

License:Apache License

private void create() throws InterruptedException, IOException {
    Job job = newJob();
    List<StageInput> inputList = new ArrayList<>();
    inputList.add(new StageInput(storage.getPatchContents("*").toString(), TemporaryInputFormat.class,
            CreateCacheMapper.class));
    StageInputDriver.set(job, inputList);
    job.setInputFormatClass(StageInputFormat.class);
    job.setMapperClass(StageInputMapper.class);
    job.setMapOutputKeyClass(NullWritable.class);
    job.setMapOutputValueClass(modelClass);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(modelClass);

    TemporaryOutputFormat.setOutputPath(job, getNextDirectory());
    job.setOutputFormatClass(TemporaryOutputFormat.class);
    job.getConfiguration().setClass("mapred.output.committer.class", LegacyBridgeOutputCommitter.class,
            org.apache.hadoop.mapred.OutputCommitter.class);

    job.setNumReduceTasks(0);//from  w  ww . j ava 2 s .co  m

    LOG.info(MessageFormat.format("applying patch (no join): {0} / (empty) -> {2}",
            storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
    try {
        boolean succeed = job.waitForCompletion(true);
        LOG.info(MessageFormat.format("applied patch (no join): succeed={0}, {1} / (empty) -> {3}", succeed,
                storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
        if (succeed == false) {
            throw new IOException(MessageFormat.format("failed to apply patch (no join): {0} / (empty) -> {2}",
                    storage.getPatchContents("*"), storage.getHeadContents("*"), getNextContents()));
        }
    } catch (ClassNotFoundException e) {
        throw new IOException(e);
    }
    putMeta();
}

From source file:com.asp.tranlog.ImportTsv.java

License:Apache License

/**
 * Sets up the actual job.//from w ww .  j  a v  a 2s . com
 * 
 * @param conf
 *            The current configuration.
 * @param args
 *            The command line parameters.
 * @return The newly created job.
 * @throws IOException
 *             When setting up the job fails.
 */
public static Job createSubmittableJob(Configuration conf, String[] args)
        throws IOException, ClassNotFoundException {

    // Support non-XML supported characters
    // by re-encoding the passed separator as a Base64 string.
    String actualSeparator = conf.get(SEPARATOR_CONF_KEY);
    if (actualSeparator != null) {
        conf.set(SEPARATOR_CONF_KEY, new String(Base64.encodeBytes(actualSeparator.getBytes())));
    }

    // See if a non-default Mapper was set
    String mapperClassName = conf.get(MAPPER_CONF_KEY);
    Class mapperClass = mapperClassName != null ? Class.forName(mapperClassName) : DEFAULT_MAPPER;

    String tableName = args[0];
    Path inputDir = new Path(args[1]);
    Job job = new Job(conf, NAME + "_" + tableName);
    job.setJarByClass(mapperClass);
    FileInputFormat.setInputPaths(job, inputDir);

    String inputCodec = conf.get(INPUT_LZO_KEY);
    if (inputCodec == null) {
        FileInputFormat.setMaxInputSplitSize(job, 67108864l); // max split
        // size =
        // 64m
        job.setInputFormatClass(TextInputFormat.class);
    } else {
        if (inputCodec.equalsIgnoreCase("lzo"))
            job.setInputFormatClass(LzoTextInputFormat.class);
        else {
            usage("not supported compression codec!");
            System.exit(-1);
        }
    }

    job.setMapperClass(mapperClass);

    String hfileOutPath = conf.get(BULK_OUTPUT_CONF_KEY);
    if (hfileOutPath != null) {
        HTable table = new HTable(conf, tableName);
        job.setReducerClass(PutSortReducer.class);
        Path outputDir = new Path(hfileOutPath);
        FileOutputFormat.setOutputPath(job, outputDir);
        job.setMapOutputKeyClass(ImmutableBytesWritable.class);
        job.setMapOutputValueClass(Put.class);
        HFileOutputFormat.configureIncrementalLoad(job, table);
    } else {
        // No reducers. Just write straight to table. Call
        // initTableReducerJob
        // to set up the TableOutputFormat.
        TableMapReduceUtil.initTableReducerJob(tableName, null, job);
        job.setNumReduceTasks(0);
    }

    TableMapReduceUtil.addDependencyJars(job);
    TableMapReduceUtil.addDependencyJars(job.getConfiguration(), com.google.common.base.Function.class /*
                                                                                                       * Guava used by TsvParser
                                                                                                       */);
    return job;
}

From source file:com.avira.couchdoop.demo.BenchmarkUpdater.java

License:Apache License

public Job configureJob(Configuration conf, String input) throws IOException {
    conf.setInt("mapreduce.map.failures.maxpercent", 5);
    conf.setInt("mapred.max.map.failures.percent", 5);
    conf.setInt("mapred.max.tracker.failures", 20);

    Job job = Job.getInstance(conf);
    job.setJarByClass(BenchmarkUpdater.class);

    // User classpath takes precedence in favor of Hadoop classpath.
    // This is because the Couchbase client requires a newer version of
    // org.apache.httpcomponents:httpcore.
    job.setUserClassesTakesPrecedence(true);

    // Input//from www . ja  v  a  2s  .  c  o m
    FileInputFormat.setInputPaths(job, input);

    // Mapper
    job.setMapperClass(BenchmarkUpdateMapper.class);
    job.setMapOutputKeyClass(String.class);
    job.setMapOutputValueClass(CouchbaseAction.class);

    // Reducer
    job.setNumReduceTasks(0);

    // Output
    job.setOutputFormatClass(CouchbaseOutputFormat.class);
    job.setMapOutputKeyClass(String.class);
    job.setMapOutputValueClass(CouchbaseAction.class);

    return job;
}

From source file:com.avira.couchdoop.jobs.CouchbaseExporter.java

License:Apache License

public Job configureJob(Configuration conf, String input) throws IOException {
    conf.setInt("mapreduce.map.failures.maxpercent", 5);
    conf.setInt("mapred.max.map.failures.percent", 5);
    conf.setInt("mapred.max.tracker.failures", 20);

    Job job = Job.getInstance(conf);
    job.setJarByClass(CouchbaseExporter.class);

    // Input/*w w  w  .java2  s  .  co m*/
    FileInputFormat.setInputPaths(job, input);

    // Mapper
    job.setMapperClass(CsvToCouchbaseMapper.class);
    job.setMapOutputKeyClass(String.class);
    job.setMapOutputValueClass(CouchbaseAction.class);

    // Reducer
    job.setNumReduceTasks(0);

    // Output
    job.setOutputFormatClass(CouchbaseOutputFormat.class);
    job.setOutputKeyClass(String.class);
    job.setOutputValueClass(CouchbaseAction.class);

    return job;
}

From source file:com.avira.couchdoop.jobs.CouchbaseViewImporter.java

License:Apache License

public Job configureJob(Configuration conf, String output) throws IOException {
    conf.setInt("mapreduce.map.failures.maxpercent", 5);
    conf.setInt("mapred.max.map.failures.percent", 5);
    conf.setInt("mapred.max.tracker.failures", 20);

    Job job = Job.getInstance(conf);
    job.setJarByClass(CouchbaseViewImporter.class);

    // Input/*from   w  ww  .j av a  2s  .  com*/
    job.setInputFormatClass(CouchbaseViewInputFormat.class);

    // Mapper
    job.setMapperClass(CouchbaseViewToFileMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(Text.class);

    // Reducer
    job.setNumReduceTasks(0);

    // Output
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    FileOutputFormat.setOutputPath(job, new Path(output));

    return job;
}