Example usage for org.apache.hadoop.mapreduce.lib.input FileInputFormat addInputPath

Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce.lib.input FileInputFormat addInputPath.

Prototype

public static void addInputPath(Job job, Path path) throws IOException 

Source Link

Document

Add a Path to the list of inputs for the map-reduce job.

Usage

From source file:WordCount_SiCombiner.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();

    GenericOptionsParser parser = new GenericOptionsParser(conf, args);
    String[] otherArgs = parser.getRemainingArgs();

    if (otherArgs.length != 2) {
        System.err.println("Usage: wordcount <in> <out>");
        System.exit(2);/* w w w. j  a v a2  s  .  c o m*/
    }
    Job job = new Job(conf, "word count");
    job.setJarByClass(WordCount_SiCombiner.class);
    job.setMapperClass(TokenizerMapper.class);

    job.setCombinerClass(IntSumReducer.class);

    // disable combiner
    // job.setCombinerClass(IntSumReducer.class);

    job.setPartitionerClass(WordPartition.class);
    job.setNumReduceTasks(5);

    job.setReducerClass(IntSumReducer.class);

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

    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

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From source file:GetRetweetersAndCountPerUser.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) {
        System.err.println("Usage: GetRetweetersAndCountPerUser <in> <out> <num_reducers>");
        System.exit(2);/*  ww  w.  ja v  a2  s  .  c o  m*/
    }
    Job job = new Job(conf, "word count");
    job.setJarByClass(RetweetersPerUser.class);
    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    System.out.println(otherArgs[0]);
    job.setMapperClass(TweetMapper.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(IntWritable.class);
    job.setOutputValueClass(IntWritable.class);
    job.setNumReduceTasks(Integer.parseInt(args[2]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));

    if (job.waitForCompletion(true)) {
        FileSystem hdfs = FileSystem.get(new URI(args[1]), conf);
        Path dir = new Path(args[1]);
        PathFilter filter = new PathFilter() {
            public boolean accept(Path file) {
                return file.getName().startsWith("part-r-");
            }
        };

        HashMap<Integer, Integer> counts_for_user = new HashMap<Integer, Integer>();
        FileStatus[] files = hdfs.listStatus(dir, filter);
        Arrays.sort(files);
        for (int i = 0; i != files.length; i++) {
            Path pt = files[i].getPath();
            BufferedReader br = new BufferedReader(new InputStreamReader(hdfs.open(pt)));
            String line = null;
            while ((line = br.readLine()) != null) {
                String[] columns = new String[2];
                columns = line.split("\t");
                int key = Integer.parseInt(columns[0]);
                if (counts_for_user.containsKey(key))
                    counts_for_user.put(key, counts_for_user.get(key) + 1);
                else
                    counts_for_user.put(key, 1);
            }
            br.close();
        }

        FSDataOutputStream fsDataOutputStream = hdfs.create(new Path(otherArgs[1] + "_count"));
        PrintWriter writer = new PrintWriter(fsDataOutputStream);
        for (Entry<Integer, Integer> e : counts_for_user.entrySet()) {
            writer.write(e.getKey() + "\t" + e.getValue() + "\n");
        }
        writer.close();
        fsDataOutputStream.close();
        hdfs.close();
        System.exit(0);
    }
    System.exit(1);
}

---

From source file:WordCount_PerMapTally.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();

    GenericOptionsParser parser = new GenericOptionsParser(conf, args);
    String[] otherArgs = parser.getRemainingArgs();

    if (otherArgs.length != 2) {
        System.err.println("Usage: wordcount <in> <out>");
        System.exit(2);/*from   w  w  w  . j  a v a 2 s  . c  o m*/
    }
    Job job = new Job(conf, "word count");
    job.setJarByClass(WordCount_PerMapTally.class);
    job.setMapperClass(TokenizerMapper.class);

    // disable combiner
    // job.setCombinerClass(IntSumReducer.class);

    job.setPartitionerClass(WordPartitioner.class);
    job.setNumReduceTasks(5);

    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:SiCombiner.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 != 2) {
        System.err.println("Usage: wordcount <in> <out>");
        System.exit(2);//from  www . jav a  2s.  c o  m
    }
    Job job = new Job(conf, "word count");
    job.setJarByClass(SiCombiner.class);
    job.setMapperClass(TokenizerMapper.class);
    // Aniket changes starts
    /* Here the partitioner is being called*/
    job.setPartitionerClass(WordPartitioner.class);
    // Aniket changes ends
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:PerMapTally.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 != 2) {
        System.err.println("Usage: wordcount <in> <out>");
        System.exit(2);/*from  w w  w . j a v a  2s.c  o m*/
    }
    Job job = new Job(conf, "word count");
    job.setJarByClass(PerMapTally.class);
    job.setMapperClass(TokenizerMapper.class);
    // Aniket changes starts
    /* Here the partitioner is being called*/
    job.setPartitionerClass(WordPartitioner.class);
    // Aniket changes ends
    // Part 3 Aniket changes starts
    /* Here I am just disabling the combiner */
    // job.setCombinerClass(IntSumReducer.class);
    // Part 3 Aniket changes ends
    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:ImageDuplicatesRemover.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();

    //This is the line that makes the hadoop run locally
    //conf.set("mapred.job.tracker", "local");

    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
    if (otherArgs.length != 2) {
        System.err.println("Usage: wordcount <in> <out>");
        System.exit(2);//from   w  w w .ja va2s.  c o  m
    }
    Job job = new Job(conf, "image dups remover");
    job.setJarByClass(ImageDuplicatesRemover.class);
    job.setInputFormatClass(SequenceFileInputFormat.class);
    job.setMapperClass(ImageMd5Mapper.class);
    job.setReducerClass(ImageDupsReducer.class);
    //job.setNumReduceTasks(2);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);

}

---

From source file:ReverseIndexer.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 < 2) {
        System.err.println("Usage: ReverseIndexer <output> <input file(s)>");
        System.exit(2);//from w ww  . java2s.c  o m
    }
    Job job = new Job(conf, "reverse indexer");
    job.setJarByClass(ReverseIndexer.class);
    job.setMapperClass(IndexerMapper.class);
    job.setReducerClass(IndexerReducer.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(LineRecWritable.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    for (int i = 1; i < otherArgs.length; i++) {
        FileInputFormat.addInputPath(job, new Path(otherArgs[i]));
    }
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[0]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:Authset.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 < 2) {
        System.err.println("Usage: wordcount <in> [<in>...] <out>");
        System.exit(2);/*  ww w  . jav a 2  s .com*/
    }
    Job job = new Job(conf, "word count");
    job.setJarByClass(Authset.class);
    job.setMapperClass(TokenizerMapper.class);
    //job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(IntWritable.class);
    job.setOutputValueClass(NullWritable.class);
    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setNumReduceTasks(10);
    for (int i = 0; i < otherArgs.length - 1; ++i) {
        FileInputFormat.addInputPath(job, new Path(otherArgs[i]));
    }
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[otherArgs.length - 1]));
    //DistributedCache.addCacheFile(new Path(otherArgs[0]).toUri(),
    //job.getConfiguration());

    //DistributedCache.setLocalFiles(job.getConfiguration(), otherArgs[0]);
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:RHBlockToKeyRangeIndex.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 != 2) {
        System.err.println("Usage: rhblockindex <in> <out>");
        System.exit(2);//from   ww w.j a  v a  2  s .c o m
    }
    Job job = new Job(conf, "rhblockindex");
    job.setJarByClass(RHBlockToKeyRangeIndex.class);
    job.setMapperClass(RMapper.class);
    job.setCombinerClass(RReducer.class);
    job.setReducerClass(RReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);

    FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:DumpRecordsExtended.java

License:Apache License

/**
 * Runs this tool./*from w w  w .ja  v a2s.  com*/
 */
@SuppressWarnings({ "static-access" })
public int run(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input path").create(INPUT));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output path").create(OUTPUT));

    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) || !cmdline.hasOption(OUTPUT)) {
        System.out.println("args: " + Arrays.toString(args));
        HelpFormatter formatter = new HelpFormatter();
        formatter.setWidth(120);
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    String inputPath = cmdline.getOptionValue(INPUT);
    String outputPath = cmdline.getOptionValue(OUTPUT);

    LOG.info("Tool name: " + DumpRecordsExtended.class.getSimpleName());
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    Configuration conf = new Configuration();
    conf.setInt("mapred.min.split.size", 1024 * 1024 * 1024);

    Job job = Job.getInstance(conf);
    job.setJobName(DumpRecordsExtended.class.getSimpleName());
    job.setJarByClass(DumpRecordsExtended.class);

    job.setNumReduceTasks(0);

    FileInputFormat.addInputPath(job, new Path(inputPath));
    FileOutputFormat.setOutputPath(job, new Path(outputPath));

    job.setInputFormatClass(SequenceFileInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);

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

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

    job.waitForCompletion(true);

    return 0;
}

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