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

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

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Introduction

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

Prototype

public void setMapperClass(Class<? extends Mapper> cls) throws IllegalStateException

Source Link

Document

Set the Mapper for the job.

Usage

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

License:Apache License

private void configureStageInput(Job job, VariableTable variables) {
    List<StageInput> inputList = new ArrayList<>();
    for (StageInput input : getStageInputs()) {
        Class<? extends Mapper<?, ?, ?, ?>> mapperClass = input.getMapperClass();
        String pathString = input.getPathString();
        Class<? extends InputFormat<?, ?>> formatClass = input.getFormatClass();
        String expanded = variables.parse(pathString);
        Map<String, String> attributes = input.getAttributes();
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("Input: path={0}, format={1}, mapper={2}, attributes={3}", //$NON-NLS-1$
                    expanded, formatClass.getName(), mapperClass.getName(), attributes));
        }/*from   w w w  . j av  a  2s . c  om*/
        inputList.add(new StageInput(expanded, formatClass, mapperClass, attributes));
    }
    StageInputDriver.set(job, inputList);
    job.setInputFormatClass(StageInputFormat.class);
    job.setMapperClass(StageInputMapper.class);
}

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  ww  .  j ava2 s  .  c  o  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);/*  ww w .ja  v a  2 s .co m*/

    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 .jav a2s  . c  o 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  w  w  .  j a  v a  2s.co  m
 * 
 * @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// ww  w  .  j a v a2  s . co  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.demo.ExportDriver.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    if (args.length != 1) {
        System.err.println("Usage: <input_path>");
        return 1;
    }/*from www  .  ja  v a  2 s  . c o m*/
    String input = args[0];

    Job job = Job.getInstance(getConf());
    job.setJarByClass(ExportDriver.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
    FileInputFormat.setInputPaths(job, input);

    // Mapper
    job.setMapperClass(ExportMapper.class);

    // Reducer
    job.setNumReduceTasks(0);

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

    if (!job.waitForCompletion(true)) {
        return 2;
    }

    return 0;
}

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

License:Apache License

@Override
public int run(String[] args) throws Exception {
    if (args.length != 1) {
        System.err.println("Usage: <output_path>");
        return 1;
    }// w w  w .j a va  2  s .c  o  m
    String output = args[0];

    Job job = Job.getInstance(getConf());
    job.setJarByClass(this.getClass());

    // 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
    job.setInputFormatClass(CouchbaseViewInputFormat.class);

    // Mapper
    job.setMapperClass(ImportMapper.class);

    // Reducer
    job.setNumReduceTasks(0);

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

    if (!job.waitForCompletion(true)) {
        return 2;
    }

    return 0;
}

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//ww w .ja v a2  s  .  c om
    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  .  ja va2 s. c om
    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;
}