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

Introduction

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

Prototype

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

Source Link

Document

Set the value class for job outputs.

Usage

From source file:com.cloudera.hbase.WordCount.java

License:Open Source License

public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: wordcount <in> <out>");
        return 2;
    }//from  ww w  . j  a  v  a2 s  .  c  om

    Configuration conf = getConf();

    Job job = new Job(conf, "word count");
    job.setJarByClass(WordCount.class);
    job.setMapperClass(Map.class);
    job.setCombinerClass(Reduce.class);
    job.setReducerClass(Reduce.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));
    return job.waitForCompletion(true) ? 0 : 1;
}

---

From source file:com.cloudera.recordservice.examples.mapreduce.RecordCount.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: RecordCount <input_query> <output_path>");
        System.exit(1);/*from   www  .  ja  v a 2 s . com*/
    }
    String inputQuery = args[0];
    String output = args[1];

    Job job = Job.getInstance(getConf());
    job.setJobName("recordcount");
    job.setJarByClass(RecordCount.class);
    job.setMapperClass(Map.class);
    job.setCombinerClass(Reduce.class);
    job.setReducerClass(Reduce.class);
    job.setNumReduceTasks(1);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(LongWritable.class);

    RecordServiceConfig.setInputQuery(job.getConfiguration(), inputQuery);
    job.setInputFormatClass(RecordServiceInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);

    FileSystem fs = FileSystem.get(job.getConfiguration());
    Path outputPath = new Path(output);
    if (fs.exists(outputPath))
        fs.delete(outputPath, true);
    FileOutputFormat.setOutputPath(job, outputPath);

    return job.waitForCompletion(true) ? 0 : 1;
}

---

From source file:com.cloudera.recordservice.examples.terasort.TeraChecksum.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    boolean useRecordService = false;
    Job job = Job.getInstance(getConf());
    if (args.length != 2 && args.length != 3) {
        usage();/*from w w w.j  a va  2s .c o m*/
        return 2;
    }
    if (args.length == 3) {
        useRecordService = Boolean.parseBoolean(args[2]);
    }

    FileOutputFormat.setOutputPath(job, new Path(args[1]));
    job.setJobName("TeraSum");
    job.setJarByClass(TeraChecksum.class);
    job.setMapperClass(ChecksumMapper.class);
    job.setReducerClass(ChecksumReducer.class);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(Unsigned16.class);
    // force a single reducer
    job.setNumReduceTasks(1);
    if (useRecordService) {
        RecordServiceConfig.setInputTable(job.getConfiguration(), null, args[0]);
        job.setInputFormatClass(RecordServiceTeraInputFormat.class);
    } else {
        TeraInputFormat.setInputPaths(job, new Path(args[0]));
        job.setInputFormatClass(TeraInputFormat.class);
    }
    return job.waitForCompletion(true) ? 0 : 1;
}

---

From source file:com.cloudera.recordservice.examples.terasort.TeraGen.java

License:Apache License

/**
 * @param args the cli arguments/*from w  w  w.ja v a2 s.co  m*/
 */
@Override
public int run(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
    Job job = Job.getInstance(getConf());
    if (args.length != 2) {
        usage();
        return 2;
    }
    setNumberOfRows(job, parseHumanLong(args[0]));
    Path outputDir = new Path(args[1]);
    if (outputDir.getFileSystem(getConf()).exists(outputDir)) {
        throw new IOException("Output directory " + outputDir + " already exists.");
    }
    FileOutputFormat.setOutputPath(job, outputDir);
    job.setJobName("TeraGen");
    job.setJarByClass(TeraGen.class);
    job.setMapperClass(SortGenMapper.class);
    job.setNumReduceTasks(0);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    job.setInputFormatClass(RangeInputFormat.class);
    job.setOutputFormatClass(TeraOutputFormat.class);
    return job.waitForCompletion(true) ? 0 : 1;
}

---

From source file:com.cloudera.recordservice.examples.terasort.TeraSort.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    boolean useRecordService = false;
    if (args.length != 2 && args.length != 3) {
        usage();/*from w  w  w. ja va2s  .c om*/
        return 1;
    }
    if (args.length == 3) {
        useRecordService = Boolean.parseBoolean(args[2]);
    }

    LOG.info("starting");
    Job job = Job.getInstance(getConf());
    boolean useSimplePartitioner = getUseSimplePartitioner(job);

    if (useRecordService) {
        RecordServiceConfig.setInputTable(job.getConfiguration(), null, args[0]);
        job.setInputFormatClass(RecordServiceTeraInputFormat.class);
        useSimplePartitioner = true;
    } else {
        Path inputDir = new Path(args[0]);
        TeraInputFormat.setInputPaths(job, inputDir);
        job.setInputFormatClass(TeraInputFormat.class);
    }

    Path outputDir = new Path(args[1]);
    FileOutputFormat.setOutputPath(job, outputDir);
    job.setJobName("TeraSort");
    job.setJarByClass(TeraSort.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    job.setOutputFormatClass(TeraOutputFormat.class);
    if (useSimplePartitioner) {
        job.setPartitionerClass(SimplePartitioner.class);
    } else {
        long start = System.currentTimeMillis();
        Path partitionFile = new Path(outputDir, TeraInputFormat.PARTITION_FILENAME);
        URI partitionUri = new URI(partitionFile.toString() + "#" + TeraInputFormat.PARTITION_FILENAME);
        try {
            TeraInputFormat.writePartitionFile(job, partitionFile);
        } catch (Throwable e) {
            LOG.error(e.getMessage());
            return -1;
        }
        job.addCacheFile(partitionUri);
        long end = System.currentTimeMillis();
        System.out.println("Spent " + (end - start) + "ms computing partitions.");
        job.setPartitionerClass(TotalOrderPartitioner.class);
    }

    job.getConfiguration().setInt("dfs.replication", getOutputReplication(job));
    TeraOutputFormat.setFinalSync(job, true);
    int ret = job.waitForCompletion(true) ? 0 : 1;
    LOG.info("done");
    return ret;
}

---

From source file:com.cloudera.recordservice.examples.terasort.TeraValidate.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    boolean useRecordService = false;
    if (args.length != 2 && args.length != 3) {
        usage();/*from  w  w  w  .  j  ava2  s  .  c o m*/
        return 1;
    }
    if (args.length == 3) {
        useRecordService = Boolean.parseBoolean(args[2]);
    }

    Job job = Job.getInstance(getConf());
    FileOutputFormat.setOutputPath(job, new Path(args[1]));
    job.setJobName("TeraValidate");
    job.setJarByClass(TeraValidate.class);
    job.setMapperClass(ValidateMapper.class);
    job.setReducerClass(ValidateReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    // force a single reducer
    job.setNumReduceTasks(1);
    // force a single split
    FileInputFormat.setMinInputSplitSize(job, Long.MAX_VALUE);
    if (useRecordService) {
        RecordServiceConfig.setInputTable(job.getConfiguration(), null, args[0]);
        job.setInputFormatClass(RecordServiceTeraInputFormat.class);
    } else {
        TeraInputFormat.setInputPaths(job, new Path(args[0]));
        job.setInputFormatClass(TeraInputFormat.class);
    }
    return job.waitForCompletion(true) ? 0 : 1;
}

---

From source file:com.cloudera.sa.securewordcount.SecureWordCountDriver.java

@Override
public int run(String[] args) throws Exception {
    Configuration config = getConf();
    args = new GenericOptionsParser(config, args).getRemainingArgs();

    if (args.length < 2) {

        ToolRunner.printGenericCommandUsage(System.out);
        return 2;
    }//from  w ww.j  ava2s .  c o m
    Job job = Job.getInstance(config, this.getClass().getName() + "-wordcount");
    job.setJarByClass(SecureWordCountDriver.class);
    job.setInputFormatClass(TextInputFormat.class);
    job.setMapperClass(TokenizerMapper.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));
    return job.waitForCompletion(true) ? 0 : 1;

}

---

From source file:com.cloudera.sqoop.mapreduce.db.TestDataDrivenDBInputFormat.java

License:Apache License

public void testDateSplits() throws Exception {
    Statement s = connection.createStatement();
    final String DATE_TABLE = "datetable";
    final String COL = "foo";
    try {/*from  www  .ja v a 2 s  .  com*/
        try {
            // delete the table if it already exists.
            s.executeUpdate("DROP TABLE " + DATE_TABLE);
        } catch (SQLException e) {
            // Ignored; proceed regardless of whether we deleted the table;
            // it may have simply not existed.
        }

        // Create the table.
        s.executeUpdate("CREATE TABLE " + DATE_TABLE + "(" + COL + " TIMESTAMP)");
        s.executeUpdate("INSERT INTO " + DATE_TABLE + " VALUES('2010-04-01')");
        s.executeUpdate("INSERT INTO " + DATE_TABLE + " VALUES('2010-04-02')");
        s.executeUpdate("INSERT INTO " + DATE_TABLE + " VALUES('2010-05-01')");
        s.executeUpdate("INSERT INTO " + DATE_TABLE + " VALUES('2011-04-01')");

        // commit this tx.
        connection.commit();

        Configuration conf = new Configuration();
        conf.set("fs.defaultFS", "file:///");
        FileSystem fs = FileSystem.getLocal(conf);
        fs.delete(new Path(OUT_DIR), true);

        // now do a dd import
        Job job = new Job(conf);
        job.setMapperClass(ValMapper.class);
        job.setReducerClass(Reducer.class);
        job.setMapOutputKeyClass(DateCol.class);
        job.setMapOutputValueClass(NullWritable.class);
        job.setOutputKeyClass(DateCol.class);
        job.setOutputValueClass(NullWritable.class);
        job.setNumReduceTasks(1);
        job.getConfiguration().setInt("mapreduce.map.tasks", 2);
        FileOutputFormat.setOutputPath(job, new Path(OUT_DIR));
        DBConfiguration.configureDB(job.getConfiguration(), DRIVER_CLASS, DB_URL, (String) null, (String) null);
        DataDrivenDBInputFormat.setInput(job, DateCol.class, DATE_TABLE, null, COL, COL);

        boolean ret = job.waitForCompletion(true);
        assertTrue("job failed", ret);

        // Check to see that we imported as much as we thought we did.
        assertEquals("Did not get all the records", 4, job.getCounters()
                .findCounter("org.apache.hadoop.mapred.Task$Counter", "REDUCE_OUTPUT_RECORDS").getValue());
    } finally {
        s.close();
    }
}

---

From source file:com.cloudera.sqoop.mapreduce.HBaseImportJob.java

License:Apache License

@Override
protected void configureMapper(Job job, String tableName, String tableClassName) throws IOException {
    job.setOutputKeyClass(SqoopRecord.class);
    job.setOutputValueClass(NullWritable.class);
    job.setMapperClass(getMapperClass());
}

---

From source file:com.cloudera.sqoop.mapreduce.MergeJob.java

License:Apache License

public boolean runMergeJob() throws IOException {
    Configuration conf = options.getConf();
    Job job = new Job(conf);

    String userClassName = options.getClassName();
    if (null == userClassName) {
        // Shouldn't get here.
        throw new IOException("Record class name not specified with " + "--class-name.");
    }/*w  w  w.  j  a  va 2s .c  o  m*/

    // Set the external jar to use for the job.
    String existingJar = options.getExistingJarName();
    if (existingJar != null) {
        // User explicitly identified a jar path.
        LOG.debug("Setting job jar to user-specified jar: " + existingJar);
        job.getConfiguration().set("mapred.jar", existingJar);
    } else {
        // Infer it from the location of the specified class, if it's on the
        // classpath.
        try {
            Class<? extends Object> userClass = conf.getClassByName(userClassName);
            if (null != userClass) {
                String userJar = Jars.getJarPathForClass(userClass);
                LOG.debug("Setting job jar based on user class " + userClassName + ": " + userJar);
                job.getConfiguration().set("mapred.jar", userJar);
            } else {
                LOG.warn("Specified class " + userClassName + " is not in a jar. "
                        + "MapReduce may not find the class");
            }
        } catch (ClassNotFoundException cnfe) {
            throw new IOException(cnfe);
        }
    }

    try {
        Path oldPath = new Path(options.getMergeOldPath());
        Path newPath = new Path(options.getMergeNewPath());

        Configuration jobConf = job.getConfiguration();
        FileSystem fs = FileSystem.get(jobConf);
        oldPath = oldPath.makeQualified(fs);
        newPath = newPath.makeQualified(fs);

        FileInputFormat.addInputPath(job, oldPath);
        FileInputFormat.addInputPath(job, newPath);

        jobConf.set(MERGE_OLD_PATH_KEY, oldPath.toString());
        jobConf.set(MERGE_NEW_PATH_KEY, newPath.toString());
        jobConf.set(MERGE_KEY_COL_KEY, options.getMergeKeyCol());
        jobConf.set(MERGE_SQOOP_RECORD_KEY, userClassName);

        FileOutputFormat.setOutputPath(job, new Path(options.getTargetDir()));

        if (ExportJobBase.isSequenceFiles(jobConf, newPath)) {
            job.setInputFormatClass(SequenceFileInputFormat.class);
            job.setOutputFormatClass(SequenceFileOutputFormat.class);
            job.setMapperClass(MergeRecordMapper.class);
        } else {
            job.setMapperClass(MergeTextMapper.class);
            job.setOutputFormatClass(RawKeyTextOutputFormat.class);
        }

        jobConf.set("mapred.output.key.class", userClassName);
        job.setOutputValueClass(NullWritable.class);

        job.setReducerClass(MergeReducer.class);

        // Set the intermediate data types.
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(MergeRecord.class);

        // Make sure Sqoop and anything else we need is on the classpath.
        cacheJars(job, null);
        return this.runJob(job);
    } catch (InterruptedException ie) {
        throw new IOException(ie);
    } catch (ClassNotFoundException cnfe) {
        throw new IOException(cnfe);
    }
}

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