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

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.airline.analytics.AirlineDelayAnalytics.java

@Override
public int run(String[] strings) throws Exception {

    Job job = Job.getInstance(getConf(), "Hadoop Airline Delay Analytics");

    job.setJarByClass(AirlineDelayAnalytics.class);

    job.setMapperClass(AirlineMapper.class);
    // job.setCombinerClass(AirlineReducer.class);
    job.setReducerClass(AirlineReducer.class);

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

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

    FileInputFormat.addInputPath(job, new Path(strings[0]));
    FileOutputFormat.setOutputPath(job, new Path(strings[1]));

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

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From source file:com.airline.analytics.AirlineUniqueRoutesAnalytics.java

@Override
public int run(String[] strings) throws Exception {

    Job job = Job.getInstance(getConf(), "Hadoop Airline Orign Destination Analytics");

    job.setJarByClass(getClass());//  w w w  .  j a  v  a  2 s .c  om

    // Distributed Cache
    job.addCacheFile(new URI("/airline/codes.csv"));

    job.setMapperClass(AirlineMapper.class);
    // job.setCombinerClass(AirlineReducer.class);
    job.setReducerClass(AirlineReducer.class);

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

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

    FileInputFormat.addInputPath(job, new Path(strings[0]));
    FileOutputFormat.setOutputPath(job, new Path(strings[1]));

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

---

From source file:com.alectenharmsel.hadoop.qa.LineCount.java

License:Apache License

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

    String[] remainingArgs = parse.getRemainingArgs();
    if (remainingArgs.length != 2) {
        System.err.println("Usage: LineCount <input> <output>");
        System.exit(-1);/*from   w  w w .jav a 2  s .  c  o m*/
    }

    Job job = Job.getInstance(conf, "LineCount");
    job.setJarByClass(LineCount.class);

    job.setMapperClass(Map.class);
    job.setCombinerClass(Reduce.class);
    job.setReducerClass(Reduce.class);

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

    FileInputFormat.addInputPath(job, new Path(remainingArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(remainingArgs[1]));

    boolean success = job.waitForCompletion(true);

    int res = success ? 0 : 1;
    System.exit(res);
}

---

From source file:com.alectenharmsel.research.FileCombine.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: FileCombine <input> <output>");
        System.exit(-1);/* w  ww  . j  ava  2  s.c om*/
    }

    Job job = new Job(getConf(), "FileCombine");
    job.setJarByClass(FileCombine.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    job.setMapperClass(FileCombineMapper.class);
    job.setReducerClass(FileCombineReducer.class);

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

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

---

From source file:com.alectenharmsel.research.hadoop.CodeTokenizer.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: MoabLicenses <input> <output>");
        System.exit(-1);/*from  www .  j a v a2  s. co m*/
    }

    Configuration conf = getConf();
    Job job = new Job(conf, "SrcTok");
    job.setJarByClass(CodeTokenizer.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    job.setMapperClass(Map.class);
    job.setReducerClass(Reduce.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(LongWritable.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);

    boolean success = job.waitForCompletion(true);

    return success ? 0 : 1;
}

---

From source file:com.alectenharmsel.research.hadoop.FileCombine.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: FileCombine <input> <output>");
        System.exit(-1);//from w  w w .  j a  v  a  2  s. co  m
    }

    Job job = new Job(getConf(), "FileCombine");
    job.setJarByClass(FileCombine.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    job.setMapperClass(Map.class);
    job.setReducerClass(Reduce.class);

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

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

---

From source file:com.alectenharmsel.research.hadoop.LcCounters.java

License:Apache License

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

    String[] remainingArgs = parse.getRemainingArgs();
    if (remainingArgs.length != 2) {
        System.err.println("Usage: LineCount <input> <output>");
        System.exit(-1);/*from   w w  w .  ja  va  2s.  c  om*/
    }

    Job job = Job.getInstance(conf, "LineCount");
    job.setJarByClass(LineCount.class);

    job.setMapperClass(Map.class);
    job.setCombinerClass(Reduce.class);
    job.setReducerClass(Reduce.class);

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

    FileInputFormat.addInputPath(job, new Path(remainingArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(remainingArgs[1]));

    boolean success = job.waitForCompletion(true);

    //Get the counter here and print it
    Counters counters = job.getCounters();
    long total = counters.findCounter(LcCounters.NUM_LINES).getValue();
    System.out.println(Long.toString(total));

    int res = success ? 0 : 1;
    System.exit(res);
}

---

From source file:com.alectenharmsel.research.hadoop.MoabLicenseInfo.java

License:Apache License

public static void main(String[] args) throws Exception {
    GenericOptionsParser parser = new GenericOptionsParser(new Configuration(), args);
    Configuration conf = parser.getConfiguration();
    conf.set("mapreduce.output.textoutputformat.separator", ",");

    String[] remainingArgs = parser.getRemainingArgs();
    if (remainingArgs.length != 2) {
        System.err.println("Usage: LineCount <input> <output>");
        System.exit(-1);/*w w  w .  j a  va 2 s .  co m*/
    }

    Job job = Job.getInstance(conf, "MoabLicenseInfo");
    job.setJarByClass(MoabLicenseInfo.class);

    job.setMapperClass(Map.class);
    job.setReducerClass(Reduce.class);

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

    FileInputFormat.addInputPath(job, new Path(remainingArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(remainingArgs[1]));

    int res = job.waitForCompletion(true) ? 0 : 1;
    System.exit(res);
}

---

From source file:com.alectenharmsel.research.LcCounters.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: LineCounter <input> <output>");
        System.exit(-1);//w w w . ja  va2  s  .c om
    }

    Job job = new Job(getConf(), "LineCount");
    job.setJarByClass(LineCount.class);

    job.setInputFormatClass(WholeBlockInputFormat.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    job.setMapperClass(LineCountMapper.class);
    job.setReducerClass(LineCountReducer.class);

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

    Configuration check = job.getConfiguration();
    boolean success = job.waitForCompletion(true);

    //Get the counter here, output to a file called total in the dir
    Counters counters = job.getCounters();

    //Throw it in the file
    Path outPath = new Path(args[1]);
    FileSystem fs = outPath.getFileSystem(check);
    OutputStream out = fs.create(new Path(outPath, "total"));
    String total = counters.findCounter(LcCounters.NUM_LINES).getValue() + "\n";
    out.write(total.getBytes());
    out.close();
    return success ? 0 : 1;
}

---

From source file:com.alectenharmsel.research.MoabLicenses.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: MoabLicenses <input> <output>");
        System.exit(-1);//  w w w . j  a  v  a2 s .c o  m
    }

    Configuration conf = getConf();
    Job job = new Job(conf, "MoabLicenses");
    job.setJarByClass(MoabLicenses.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    job.setMapperClass(MoabLicensesMapper.class);
    job.setReducerClass(MoabLicensesReducer.class);

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

    Configuration check = job.getConfiguration();
    boolean success = job.waitForCompletion(true);

    return success ? 0 : 1;
}

---

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