Example usage for org.apache.hadoop.fs FileSystem listStatus

Introduction

In this page you can find the example usage for org.apache.hadoop.fs FileSystem listStatus.

Prototype

public FileStatus[] listStatus(Path[] files, PathFilter filter) throws FileNotFoundException, IOException 

Source Link

Document

Filter files/directories in the given list of paths using user-supplied path filter.

Usage

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);//from   w  ww  . ja v a  2 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:HadoopUtilsTest.java

License:Apache License

public static void main(String[] args) throws IOException {
    Configuration confgiruration = HBaseConfiguration.create();
    FileSystem fileSystem = null;
    try {//from   w w w . j av a2s. c o m
        fileSystem = FileSystem.get(confgiruration);
        FileStatus[] fileStatuses = fileSystem.listStatus(new Path("/icntv/grade/correlate-result/2013-12-12"),
                new PathFilter() {
                    @Override
                    public boolean accept(Path path) {

                        return path.getName().matches("part-r-\\d*");
                    }
                });
        for (FileStatus f : fileStatuses) {
            IOUtils.copyBytes(fileSystem.open(f.getPath()), System.out, 4096, false);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (null != fileSystem) {
            fileSystem.close();
        }
    }
}

---

From source file:DisplayClustering.java

License:Apache License

protected static void loadClustersWritable(Path output) throws IOException {
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(output.toUri(), conf);
    for (FileStatus s : fs.listStatus(output, new ClustersFilter())) {
        List<Cluster> clusters = readClustersWritable(s.getPath());
        CLUSTERS.add(clusters);// w w w  .  j  a v  a  2  s  . c o m
    }
}

---

From source file:be.uantwerpen.adrem.bigfim.AprioriPhaseReducer.java

License:Apache License

private int getLargestIndex(Configuration conf, Path path, String prefix, int index) {
    int largestIx = -1;
    try {//from w  w w  .ja v a  2  s.  co m
        FileSystem fs = path.getFileSystem(conf);
        for (FileStatus file : fs.listStatus(path, new NameStartsWithFilter(prefix))) {
            largestIx = max(largestIx, parseInt(file.getPath().getName().split("-")[index]));
        }
    } catch (NumberFormatException e) {
    } catch (IOException e) {
    }
    return largestIx;
}

---

From source file:cascading.avro.AvroScheme.java

License:Apache License

/**
 * This method peeks at the source data to get a schema when none has been provided.
 *
 * @param flowProcess The cascading FlowProcess object for this flow.
 * @param tap         The cascading Tap object.
 * @return Schema The schema of the peeked at data, or Schema.NULL if none exists.
 *//*w  ww. j  av a 2 s. co m*/
private Schema getSourceSchema(FlowProcess<JobConf> flowProcess, Tap tap) throws IOException {

    if (tap instanceof CompositeTap) {
        tap = (Tap) ((CompositeTap) tap).getChildTaps().next();
    }
    final String path = tap.getIdentifier();
    Path p = new Path(path);
    final FileSystem fs = p.getFileSystem(flowProcess.getConfigCopy());
    // Get all the input dirs
    List<FileStatus> statuses = new LinkedList<FileStatus>(Arrays.asList(fs.globStatus(p, filter)));
    // Now get all the things that are one level down
    for (FileStatus status : new LinkedList<FileStatus>(statuses)) {
        if (status.isDir())
            for (FileStatus child : Arrays.asList(fs.listStatus(status.getPath(), filter))) {
                if (child.isDir()) {
                    statuses.addAll(Arrays.asList(fs.listStatus(child.getPath(), filter)));
                } else if (fs.isFile(child.getPath())) {
                    statuses.add(child);
                }
            }
    }
    for (FileStatus status : statuses) {
        Path statusPath = status.getPath();
        if (fs.isFile(statusPath)) {
            // no need to open them all
            InputStream stream = null;
            DataFileStream reader = null;
            try {
                stream = new BufferedInputStream(fs.open(statusPath));
                reader = new DataFileStream(stream, new GenericDatumReader());
                return reader.getSchema();
            } finally {
                if (reader == null) {
                    if (stream != null) {
                        stream.close();
                    }
                } else {
                    reader.close();
                }
            }

        }
    }
    // couldn't find any Avro files, return null schema
    return Schema.create(Schema.Type.NULL);
}

---

From source file:cascading.scheme.DeprecatedAvroScheme.java

License:Apache License

/**
 * This method peeks at the source data to get a schema when none has been provided.
 *
 * @param flowProcess The cascading FlowProcess object for this flow.
 * @param tap         The cascading Tap object.
 * @return Schema The schema of the peeked at data, or Schema.NULL if none exists.
 *//*from www .  j  a  v a 2s.  c om*/
private Schema getSourceSchema(FlowProcess<? extends Configuration> flowProcess, Tap tap) throws IOException {

    if (tap instanceof CompositeTap) {
        tap = (Tap) ((CompositeTap) tap).getChildTaps().next();
    }
    final String path = tap.getIdentifier();
    Path p = new Path(path);
    final FileSystem fs = p.getFileSystem(flowProcess.getConfigCopy());
    // Get all the input dirs
    List<FileStatus> statuses = new LinkedList<FileStatus>(Arrays.asList(fs.globStatus(p, filter)));
    // Now get all the things that are one level down
    for (FileStatus status : new LinkedList<FileStatus>(statuses)) {
        if (status.isDir())
            for (FileStatus child : Arrays.asList(fs.listStatus(status.getPath(), filter))) {
                if (child.isDir()) {
                    statuses.addAll(Arrays.asList(fs.listStatus(child.getPath(), filter)));
                } else if (fs.isFile(child.getPath())) {
                    statuses.add(child);
                }
            }
    }
    for (FileStatus status : statuses) {
        Path statusPath = status.getPath();
        if (fs.isFile(statusPath)) {
            // no need to open them all
            InputStream stream = null;
            DataFileStream reader = null;
            try {
                stream = new BufferedInputStream(fs.open(statusPath));
                reader = new DataFileStream(stream, new GenericDatumReader());
                return reader.getSchema();
            } finally {
                if (reader == null) {
                    if (stream != null) {
                        stream.close();
                    }
                } else {
                    reader.close();
                }
            }

        }
    }
    // couldn't find any Avro files, return null schema
    return Schema.create(Schema.Type.NULL);
}

---

From source file:co.cask.cdap.internal.app.runtime.batch.dataset.partitioned.DynamicPartitioningOutputCommitter.java

License:Apache License

/**
 * Get a list of all paths where output from committed tasks are stored.
 * @param context the context of the current job
 * @return the list of these Paths/FileStatuses.
 * @throws IOException/*from w ww . ja v a 2  s. c  om*/
 */
private FileStatus[] getAllCommittedTaskPaths(JobContext context) throws IOException {
    Path jobAttemptPath = getJobAttemptPath(context);
    FileSystem fs = jobAttemptPath.getFileSystem(context.getConfiguration());
    return fs.listStatus(jobAttemptPath, new CommittedTaskFilter());
}

---

From source file:co.nubetech.hiho.dedup.TestDedupJob.java

License:Apache License

@Test
public void testDedupByValueWithDelimitedTextInputFormat() throws Exception {
    final String inputData1 = "Xavier Wilson,Mason Holloway,Carlos Johnston,Martin Noel,Drake Mckinney\n"
            + "Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein\n"
            + "Kennedy Bailey,Jerome Perry,David Cabrera,Edan Fleming,Orlando Tyson";
    final String inputData2 = "Zephania Bauer,Jermaine Gordon,Vincent Moon,Steven Pierce,Jasper Campos\n"
            + "Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein\n"
            + "Kennedy Bailey,Plato Atkinson,Stuart Guy,Rooney Levy,Judah Benson";
    createTextFileInHDFS(inputData1, "/input1", "testFile1.txt");
    createTextFileInHDFS(inputData2, "/input2", "testFile2.txt");
    String[] args = new String[] { "-inputFormat", "co.nubetech.hiho.dedup.DelimitedTextInputFormat",
            "-inputKeyClassName", "org.apache.hadoop.io.Text", "-inputValueClassName",
            "org.apache.hadoop.io.Text", "-inputPath", "/input1,/input2", "-outputPath", "output", "-delimeter",
            ",", "-column", "1", "-dedupBy", "value" };
    DedupJob job = runDedupJob(args);/*ww w .jav  a 2s . c om*/
    assertEquals(6, job.getTotalRecordsRead());
    assertEquals(0, job.getBadRecords());
    assertEquals(5, job.getOutput());
    assertEquals(1, job.getDuplicateRecords());

    FileSystem outputFS = getFileSystem();
    Path outputPath = new Path(outputFS.getHomeDirectory(), "output");
    FileStatus[] status = outputFS.listStatus(outputPath, getOutputPathFilter());
    assertTrue(outputFS.exists(outputPath));
    List<String> expectedOutput = new ArrayList<String>();
    expectedOutput.add("Xavier Wilson,Mason Holloway,Carlos Johnston,Martin Noel,Drake Mckinney");
    expectedOutput.add("Zephania Bauer,Jermaine Gordon,Vincent Moon,Steven Pierce,Jasper Campos");
    expectedOutput.add("Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein");
    expectedOutput.add("Kennedy Bailey,Jerome Perry,David Cabrera,Edan Fleming,Orlando Tyson");
    expectedOutput.add("Kennedy Bailey,Plato Atkinson,Stuart Guy,Rooney Levy,Judah Benson");
    int count = 0;
    for (FileStatus fileStat : status) {
        logger.debug("File status is " + fileStat.getPath() + " and is it a dir? " + fileStat.isDirectory());
        FSDataInputStream in = outputFS.open(fileStat.getPath());
        String line = null;
        while ((line = in.readLine()) != null) {
            logger.debug("Output is " + line);
            assertTrue("Matched output " + line, expectedOutput.contains(line));
            expectedOutput.remove(line);
            count++;
        }
        in.close();
    }
    assertEquals(5, count);
}

---

From source file:co.nubetech.hiho.dedup.TestDedupJob.java

License:Apache License

@Test
public void testDedupByValueWithTextInputFormat() throws Exception {
    final String inputData1 = "Xavier Wilson,Mason Holloway,Carlos Johnston,Martin Noel,Drake Mckinney\n"
            + "Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein\n"
            + "Kennedy Bailey,Jerome Perry,David Cabrera,Edan Fleming,Orlando Tyson";
    final String inputData2 = "Zephania Bauer,Jermaine Gordon,Vincent Moon,Steven Pierce,Jasper Campos\n"
            + "Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein\n"
            + "Kennedy Bailey,Plato Atkinson,Stuart Guy,Rooney Levy,Judah Benson";
    createTextFileInHDFS(inputData1, "/input1", "testFile1.txt");
    createTextFileInHDFS(inputData2, "/input2", "testFile2.txt");
    String[] args = new String[] { "-inputFormat", "org.apache.hadoop.mapreduce.lib.input.TextInputFormat",
            "-inputPath", "/input1,/input2", "-outputPath", "output", "-outputFormat",
            "co.nubetech.hiho.mapreduce.lib.output.NoKeyOnlyValueOutputFormat", "-dedupBy", "value" };
    DedupJob job = runDedupJob(args);//from w w w .  j av a 2  s.com
    assertEquals(6, job.getTotalRecordsRead());
    assertEquals(0, job.getBadRecords());
    assertEquals(5, job.getOutput());
    assertEquals(1, job.getDuplicateRecords());

    FileSystem outputFS = getFileSystem();
    Path outputPath = new Path(outputFS.getHomeDirectory(), "output");
    FileStatus[] status = outputFS.listStatus(outputPath, getOutputPathFilter());
    assertTrue(outputFS.exists(outputPath));
    List<String> expectedOutput = new ArrayList<String>();
    expectedOutput.add("Xavier Wilson,Mason Holloway,Carlos Johnston,Martin Noel,Drake Mckinney");
    expectedOutput.add("Zephania Bauer,Jermaine Gordon,Vincent Moon,Steven Pierce,Jasper Campos");
    expectedOutput.add("Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein");
    expectedOutput.add("Kennedy Bailey,Jerome Perry,David Cabrera,Edan Fleming,Orlando Tyson");
    expectedOutput.add("Kennedy Bailey,Plato Atkinson,Stuart Guy,Rooney Levy,Judah Benson");
    int count = 0;
    for (FileStatus fileStat : status) {
        logger.debug("File status is " + fileStat.getPath() + " and is it a dir? " + fileStat.isDirectory());
        FSDataInputStream in = outputFS.open(fileStat.getPath());
        String line = null;
        while ((line = in.readLine()) != null) {
            logger.debug("Output is " + line);
            assertTrue("Matched output " + line, expectedOutput.contains(line));
            expectedOutput.remove(line);
            count++;
        }
        in.close();
    }
    assertEquals(5, count);
}

---

From source file:co.nubetech.hiho.dedup.TestDedupJob.java

License:Apache License

@Test
public void testDedupByValueWithSequenceFileAsTextInputFormat() throws Exception {
    HashMap<Text, Text> inputData1 = new HashMap<Text, Text>();
    inputData1.put(new Text("1"),
            new Text("Xavier Wilson,Mason Holloway,Carlos Johnston,Martin Noel,Drake Mckinney"));
    inputData1.put(new Text("2"),
            new Text("Kennedy Bailey,Jerome Perry,David Cabrera,Edan Fleming,Orlando Tyson"));
    inputData1.put(new Text("3"),
            new Text("Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein"));
    createSequenceFileInHdfs(inputData1, "/input1", "testFile1.seq");

    HashMap<Text, Text> inputData2 = new HashMap<Text, Text>();
    inputData2.put(new Text("1"),
            new Text("Zephania Bauer,Jermaine Gordon,Vincent Moon,Steven Pierce,Jasper Campos"));
    inputData2.put(new Text("2"),
            new Text("Kennedy Bailey,Plato Atkinson,Stuart Guy,Rooney Levy,Judah Benson"));
    inputData2.put(new Text("4"),
            new Text("Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein"));
    createSequenceFileInHdfs(inputData2, "/input2", "testFile2.seq");

    String[] args = new String[] { "-inputFormat",
            "org.apache.hadoop.mapreduce.lib.input.SequenceFileAsTextInputFormat", "-outputFormat",
            "co.nubetech.hiho.mapreduce.lib.output.NoKeyOnlyValueOutputFormat", "-inputPath", "/input1,/input2",
            "-outputPath", "output", "-inputKeyClassName", "org.apache.hadoop.io.Text", "-inputValueClassName",
            "org.apache.hadoop.io.Text", "-dedupBy", "value" };
    DedupJob job = runDedupJob(args);/*from  ww  w  .java2s. c o m*/
    assertEquals(6, job.getTotalRecordsRead());
    assertEquals(0, job.getBadRecords());
    assertEquals(5, job.getOutput());
    assertEquals(1, job.getDuplicateRecords());

    FileSystem outputFS = getFileSystem();
    Path outputPath = new Path(outputFS.getHomeDirectory(), "output");
    FileStatus[] status = outputFS.listStatus(outputPath, getOutputPathFilter());
    assertTrue(outputFS.exists(outputPath));
    List<String> expectedOutput = new ArrayList<String>();
    expectedOutput.add("Xavier Wilson,Mason Holloway,Carlos Johnston,Martin Noel,Drake Mckinney");
    expectedOutput.add("Kennedy Bailey,Jerome Perry,David Cabrera,Edan Fleming,Orlando Tyson");
    expectedOutput.add("Drake Mckinney,Murphy Baird,Theodore Lindsey,Nehru Wilcox,Harper Klein");
    expectedOutput.add("Zephania Bauer,Jermaine Gordon,Vincent Moon,Steven Pierce,Jasper Campos");
    expectedOutput.add("Kennedy Bailey,Plato Atkinson,Stuart Guy,Rooney Levy,Judah Benson");
    int count = 0;
    for (FileStatus fileStat : status) {
        logger.debug("File status is " + fileStat.getPath() + " and is it a dir? " + fileStat.isDirectory());
        FSDataInputStream in = outputFS.open(fileStat.getPath());
        String line = null;
        while ((line = in.readLine()) != null) {
            logger.debug("Output is " + line);
            assertTrue("Matched output " + line, expectedOutput.contains(line));
            expectedOutput.remove(line);
            count++;
        }
        in.close();
    }
    assertEquals(5, count);
}

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