Java FileUtil.stat2Paths方法代碼示例

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
public static double[][] readMatrixFromOutput(Path dir, int n, int m) throws IOException {

        double[][] a = new double[n][m];

        Configuration conf = new Configuration();
        conf.setBoolean("fs.hdfs.impl.disable.cache", true);
        FileSystem fs = dir.getFileSystem(conf);
        for (Path p : FileUtil.stat2Paths(fs.listStatus(dir))) {
            if (p.toString().contains("part")) {
                readMatrixFromFile(fs, p, a);
            }
        }

        return a;

    }
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
static String readOutput(Path outDir, Configuration conf) 
    throws IOException {
  FileSystem fs = outDir.getFileSystem(conf);
  StringBuffer result = new StringBuffer();

  Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir,
         new Utils.OutputFileUtils.OutputFilesFilter()));
  for (Path outputFile : fileList) {
    LOG.info("Path" + ": "+ outputFile);
    BufferedReader file = 
      new BufferedReader(new InputStreamReader(fs.open(outputFile)));
    String line = file.readLine();
    while (line != null) {
      result.append(line);
      result.append("\n");
      line = file.readLine();
    }
    file.close();
  }
  return result.toString();
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
public static String readOutput(Path outDir, Configuration conf) 
    throws IOException {
  FileSystem fs = outDir.getFileSystem(conf);
  StringBuffer result = new StringBuffer();

  Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir,
         new Utils.OutputFileUtils.OutputFilesFilter()));
  for (Path outputFile : fileList) {
    LOG.info("Path" + ": "+ outputFile);
    BufferedReader file = 
      new BufferedReader(new InputStreamReader(fs.open(outputFile)));
    String line = file.readLine();
    while (line != null) {
      result.append(line);
      result.append("\n");
      line = file.readLine();
    }
    file.close();
  }
  return result.toString();
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
public void configure(String keySpec, int expect) throws Exception {
  Path testdir = new Path(TEST_DIR.getAbsolutePath());
  Path inDir = new Path(testdir, "in");
  Path outDir = new Path(testdir, "out");
  FileSystem fs = getFileSystem();
  fs.delete(testdir, true);
  conf.setInputFormat(TextInputFormat.class);
  FileInputFormat.setInputPaths(conf, inDir);
  FileOutputFormat.setOutputPath(conf, outDir);
  conf.setOutputKeyClass(Text.class);
  conf.setOutputValueClass(LongWritable.class);

  conf.setNumMapTasks(1);
  conf.setNumReduceTasks(1);

  conf.setOutputFormat(TextOutputFormat.class);
  conf.setOutputKeyComparatorClass(KeyFieldBasedComparator.class);
  conf.setKeyFieldComparatorOptions(keySpec);
  conf.setKeyFieldPartitionerOptions("-k1.1,1.1");
  conf.set(JobContext.MAP_OUTPUT_KEY_FIELD_SEPERATOR, " ");
  conf.setMapperClass(InverseMapper.class);
  conf.setReducerClass(IdentityReducer.class);
  if (!fs.mkdirs(testdir)) {
    throw new IOException("Mkdirs failed to create " + testdir.toString());
  }
  if (!fs.mkdirs(inDir)) {
    throw new IOException("Mkdirs failed to create " + inDir.toString());
  }
  // set up input data in 2 files 
  Path inFile = new Path(inDir, "part0");
  FileOutputStream fos = new FileOutputStream(inFile.toString());
  fos.write((line1 + "\n").getBytes());
  fos.write((line2 + "\n").getBytes());
  fos.close();
  JobClient jc = new JobClient(conf);
  RunningJob r_job = jc.submitJob(conf);
  while (!r_job.isComplete()) {
    Thread.sleep(1000);
  }
  
  if (!r_job.isSuccessful()) {
    fail("Oops! The job broke due to an unexpected error");
  }
  Path[] outputFiles = FileUtil.stat2Paths(
      getFileSystem().listStatus(outDir,
      new Utils.OutputFileUtils.OutputFilesFilter()));
  if (outputFiles.length > 0) {
    InputStream is = getFileSystem().open(outputFiles[0]);
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    String line = reader.readLine();
    //make sure we get what we expect as the first line, and also
    //that we have two lines
    if (expect == 1) {
      assertTrue(line.startsWith(line1));
    } else if (expect == 2) {
      assertTrue(line.startsWith(line2));
    }
    line = reader.readLine();
    if (expect == 1) {
      assertTrue(line.startsWith(line2));
    } else if (expect == 2) {
      assertTrue(line.startsWith(line1));
    }
    reader.close();
  }
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
private void validateOutput() throws IOException {
  Path[] outputFiles = FileUtil.stat2Paths(
      localFs.listStatus(new Path(TEST_ROOT_DIR + "/out"),
          new Utils.OutputFileUtils.OutputFilesFilter()));
  if (outputFiles.length > 0) {
    InputStream is = localFs.open(outputFiles[0]);
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    String line = reader.readLine();
    while (line != null) {
      StringTokenizer tokeniz = new StringTokenizer(line, "\t");
      String key = tokeniz.nextToken();
      String value = tokeniz.nextToken();
      LOG.info("Output: key: "+ key + " value: "+ value);
      int errors = Integer.parseInt(value);
      assertTrue(errors == 0);
      line = reader.readLine();
    }   
    reader.close();
  }
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
protected void checkOutput() throws IOException {
  StringBuffer output = new StringBuffer(256);
  Path[] fileList = FileUtil.stat2Paths(fileSys.listStatus(
                                          new Path(OUTPUT_DIR)));
  for (int i = 0; i < fileList.length; i++){
    LOG.info("Adding output from file: " + fileList[i]);
    output.append(StreamUtil.slurpHadoop(fileList[i], fileSys));
  }
  assertOutput(expectedOutput, output.toString());
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
@Test
public void testTextAppend() throws InterruptedException, LifecycleException,
    EventDeliveryException, IOException {

  LOG.debug("Starting...");
  final long rollCount = 3;
  final long batchSize = 2;
  final String fileName = "FlumeData";
  String newPath = testPath + "/singleTextBucket";
  int totalEvents = 0;
  int i = 1, j = 1;

  // clear the test directory
  Configuration conf = new Configuration();
  FileSystem fs = FileSystem.get(conf);
  Path dirPath = new Path(newPath);
  fs.delete(dirPath, true);
  fs.mkdirs(dirPath);

  Context context = new Context();

  // context.put("hdfs.path", testPath + "/%Y-%m-%d/%H");
  context.put("hdfs.path", newPath);
  context.put("hdfs.filePrefix", fileName);
  context.put("hdfs.rollCount", String.valueOf(rollCount));
  context.put("hdfs.batchSize", String.valueOf(batchSize));
  context.put("hdfs.writeFormat", "Text");
  context.put("hdfs.fileType", "DataStream");

  Configurables.configure(sink, context);

  Channel channel = new MemoryChannel();
  Configurables.configure(channel, context);

  sink.setChannel(channel);
  sink.start();

  Calendar eventDate = Calendar.getInstance();
  List<String> bodies = Lists.newArrayList();

  // push the event batches into channel
  for (i = 1; i < 4; i++) {
    Transaction txn = channel.getTransaction();
    txn.begin();
    for (j = 1; j <= batchSize; j++) {
      Event event = new SimpleEvent();
      eventDate.clear();
      eventDate.set(2011, i, i, i, 0); // yy mm dd
      event.getHeaders().put("timestamp",
          String.valueOf(eventDate.getTimeInMillis()));
      event.getHeaders().put("hostname", "Host" + i);
      String body = "Test." + i + "." + j;
      event.setBody(body.getBytes());
      bodies.add(body);
      channel.put(event);
      totalEvents++;
    }
    txn.commit();
    txn.close();

    // execute sink to process the events
    sink.process();
  }

  sink.stop();

  // loop through all the files generated and check their contains
  FileStatus[] dirStat = fs.listStatus(dirPath);
  Path[] fList = FileUtil.stat2Paths(dirStat);

  // check that the roll happened correctly for the given data
  long expectedFiles = totalEvents / rollCount;
  if (totalEvents % rollCount > 0) expectedFiles++;
  Assert.assertEquals("num files wrong, found: " +
      Lists.newArrayList(fList), expectedFiles, fList.length);
  verifyOutputTextFiles(fs, conf, dirPath.toUri().getPath(), fileName, bodies);
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
/** Open the output generated by this format. */
public static SequenceFile.Reader[] getReaders(Configuration conf, Path dir)
  throws IOException {
  FileSystem fs = dir.getFileSystem(conf);
  Path[] names = FileUtil.stat2Paths(fs.listStatus(dir));
  
  // sort names, so that hash partitioning works
  Arrays.sort(names);
  
  SequenceFile.Reader[] parts = new SequenceFile.Reader[names.length];
  for (int i = 0; i < names.length; i++) {
    parts[i] = new SequenceFile.Reader(fs, names[i], conf);
  }
  return parts;
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
@Override
public InputSplit[] getSplits(JobConf job, int numSplits) 
  throws IOException {
  
  Path[] paths = FileUtil.stat2Paths(listStatus(job));
  List<MultiFileSplit> splits = new ArrayList<MultiFileSplit>(Math.min(numSplits, paths.length));
  if (paths.length != 0) {
    // HADOOP-1818: Manage splits only if there are paths
    long[] lengths = new long[paths.length];
    long totLength = 0;
    for(int i=0; i<paths.length; i++) {
      FileSystem fs = paths[i].getFileSystem(job);
      lengths[i] = fs.getContentSummary(paths[i]).getLength();
      totLength += lengths[i];
    }
    double avgLengthPerSplit = ((double)totLength) / numSplits;
    long cumulativeLength = 0;

    int startIndex = 0;

    for(int i=0; i<numSplits; i++) {
      int splitSize = findSize(i, avgLengthPerSplit, cumulativeLength
          , startIndex, lengths);
      if (splitSize != 0) {
        // HADOOP-1818: Manage split only if split size is not equals to 0
        Path[] splitPaths = new Path[splitSize];
        long[] splitLengths = new long[splitSize];
        System.arraycopy(paths, startIndex, splitPaths , 0, splitSize);
        System.arraycopy(lengths, startIndex, splitLengths , 0, splitSize);
        splits.add(new MultiFileSplit(job, splitPaths, splitLengths));
        startIndex += splitSize;
        for(long l: splitLengths) {
          cumulativeLength += l;
        }
      }
    }
  }
  return splits.toArray(new MultiFileSplit[splits.size()]);    
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
static String launchWordCount(URI fileSys, JobConf conf, String input,
                              int numMaps, int numReduces) 
throws IOException {
  final Path inDir = new Path("/testing/wc/input");
  final Path outDir = new Path("/testing/wc/output");
  FileSystem fs = FileSystem.get(fileSys, conf);
  configureWordCount(fs, conf, input, numMaps, numReduces, inDir, outDir);
  JobClient.runJob(conf);
  StringBuffer result = new StringBuffer();
  {
    Path[] parents = FileUtil.stat2Paths(fs.listStatus(outDir.getParent()));
    Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir,
            new Utils.OutputFileUtils.OutputFilesFilter()));
    for(int i=0; i < fileList.length; ++i) {
      BufferedReader file = 
        new BufferedReader(new InputStreamReader(fs.open(fileList[i])));
      String line = file.readLine();
      while (line != null) {
        result.append(line);
        result.append("\n");
        line = file.readLine();
      }
      file.close();
    }
  }
  return result.toString();
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
/** Open the output generated by this format. */
public static MapFile.Reader[] getReaders(Path dir,
    Configuration conf) throws IOException {
  FileSystem fs = dir.getFileSystem(conf);
  Path[] names = FileUtil.stat2Paths(fs.listStatus(dir));

  // sort names, so that hash partitioning works
  Arrays.sort(names);
  
  MapFile.Reader[] parts = new MapFile.Reader[names.length];
  for (int i = 0; i < names.length; i++) {
    parts[i] = new MapFile.Reader(fs, names[i].toString(), conf);
  }
  return parts;
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
public void testComplexNameWithRegex() throws Exception {
  OutputStream os = getFileSystem().create(new Path(getInputDir(),
      "text.txt"));
  Writer wr = new OutputStreamWriter(os);
  wr.write("b a\n");
  wr.close();

  JobConf conf = createJobConf();
  conf.setJobName("name \\Evalue]");

  conf.setInputFormat(TextInputFormat.class);

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

  conf.setMapperClass(IdentityMapper.class);

  FileInputFormat.setInputPaths(conf, getInputDir());

  FileOutputFormat.setOutputPath(conf, getOutputDir());

  JobClient.runJob(conf);

  Path[] outputFiles = FileUtil.stat2Paths(
                         getFileSystem().listStatus(getOutputDir(),
                         new Utils.OutputFileUtils.OutputFilesFilter()));
  assertEquals(1, outputFiles.length);
  InputStream is = getFileSystem().open(outputFiles[0]);
  BufferedReader reader = new BufferedReader(new InputStreamReader(is));
  assertEquals("0\tb a", reader.readLine());
  assertNull(reader.readLine());
  reader.close();
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
public void doTestTextBatchAppend(boolean useRawLocalFileSystem)
    throws Exception {
  LOG.debug("Starting...");

  final long rollCount = 10;
  final long batchSize = 2;
  final String fileName = "FlumeData";
  String newPath = testPath + "/singleTextBucket";
  int totalEvents = 0;
  int i = 1, j = 1;

  // clear the test directory
  Configuration conf = new Configuration();
  FileSystem fs = FileSystem.get(conf);
  Path dirPath = new Path(newPath);
  fs.delete(dirPath, true);
  fs.mkdirs(dirPath);

  Context context = new Context();

  // context.put("hdfs.path", testPath + "/%Y-%m-%d/%H");
  context.put("hdfs.path", newPath);
  context.put("hdfs.filePrefix", fileName);
  context.put("hdfs.rollCount", String.valueOf(rollCount));
  context.put("hdfs.rollInterval", "0");
  context.put("hdfs.rollSize", "0");
  context.put("hdfs.batchSize", String.valueOf(batchSize));
  context.put("hdfs.writeFormat", "Text");
  context.put("hdfs.useRawLocalFileSystem",
      Boolean.toString(useRawLocalFileSystem));
  context.put("hdfs.fileType", "DataStream");

  Configurables.configure(sink, context);

  Channel channel = new MemoryChannel();
  Configurables.configure(channel, context);

  sink.setChannel(channel);
  sink.start();

  Calendar eventDate = Calendar.getInstance();
  List<String> bodies = Lists.newArrayList();

  // push the event batches into channel to roll twice
  for (i = 1; i <= (rollCount * 10) / batchSize; i++) {
    Transaction txn = channel.getTransaction();
    txn.begin();
    for (j = 1; j <= batchSize; j++) {
      Event event = new SimpleEvent();
      eventDate.clear();
      eventDate.set(2011, i, i, i, 0); // yy mm dd
      String body = "Test." + i + "." + j;
      event.setBody(body.getBytes());
      bodies.add(body);
      channel.put(event);
      totalEvents++;
    }
    txn.commit();
    txn.close();

    // execute sink to process the events
    sink.process();
  }

  sink.stop();

  // loop through all the files generated and check their contains
  FileStatus[] dirStat = fs.listStatus(dirPath);
  Path[] fList = FileUtil.stat2Paths(dirStat);

  // check that the roll happened correctly for the given data
  long expectedFiles = totalEvents / rollCount;
  if (totalEvents % rollCount > 0) expectedFiles++;
  Assert.assertEquals("num files wrong, found: " +
      Lists.newArrayList(fList), expectedFiles, fList.length);
  // check the contents of the all files
  verifyOutputTextFiles(fs, conf, dirPath.toUri().getPath(), fileName, bodies);
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
@Test
public void testAvroAppend() throws InterruptedException, LifecycleException,
    EventDeliveryException, IOException {

  LOG.debug("Starting...");
  final long rollCount = 3;
  final long batchSize = 2;
  final String fileName = "FlumeData";
  String newPath = testPath + "/singleTextBucket";
  int totalEvents = 0;
  int i = 1, j = 1;

  // clear the test directory
  Configuration conf = new Configuration();
  FileSystem fs = FileSystem.get(conf);
  Path dirPath = new Path(newPath);
  fs.delete(dirPath, true);
  fs.mkdirs(dirPath);

  Context context = new Context();

  // context.put("hdfs.path", testPath + "/%Y-%m-%d/%H");
  context.put("hdfs.path", newPath);
  context.put("hdfs.filePrefix", fileName);
  context.put("hdfs.rollCount", String.valueOf(rollCount));
  context.put("hdfs.batchSize", String.valueOf(batchSize));
  context.put("hdfs.writeFormat", "Text");
  context.put("hdfs.fileType", "DataStream");
  context.put("serializer", "AVRO_EVENT");

  Configurables.configure(sink, context);

  Channel channel = new MemoryChannel();
  Configurables.configure(channel, context);

  sink.setChannel(channel);
  sink.start();

  Calendar eventDate = Calendar.getInstance();
  List<String> bodies = Lists.newArrayList();

  // push the event batches into channel
  for (i = 1; i < 4; i++) {
    Transaction txn = channel.getTransaction();
    txn.begin();
    for (j = 1; j <= batchSize; j++) {
      Event event = new SimpleEvent();
      eventDate.clear();
      eventDate.set(2011, i, i, i, 0); // yy mm dd
      event.getHeaders().put("timestamp",
          String.valueOf(eventDate.getTimeInMillis()));
      event.getHeaders().put("hostname", "Host" + i);
      String body = "Test." + i + "." + j;
      event.setBody(body.getBytes());
      bodies.add(body);
      channel.put(event);
      totalEvents++;
    }
    txn.commit();
    txn.close();

    // execute sink to process the events
    sink.process();
  }

  sink.stop();

  // loop through all the files generated and check their contains
  FileStatus[] dirStat = fs.listStatus(dirPath);
  Path[] fList = FileUtil.stat2Paths(dirStat);

  // check that the roll happened correctly for the given data
  long expectedFiles = totalEvents / rollCount;
  if (totalEvents % rollCount > 0) expectedFiles++;
  Assert.assertEquals("num files wrong, found: " +
      Lists.newArrayList(fList), expectedFiles, fList.length);
  verifyOutputAvroFiles(fs, conf, dirPath.toUri().getPath(), fileName, bodies);
}
 

import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
private void testComparator(String keySpec, int expect) 
    throws Exception {
  String root = System.getProperty("test.build.data", "/tmp");
  Path inDir = new Path(root, "test_cmp/in");
  Path outDir = new Path(root, "test_cmp/out");
  
  conf.set("mapreduce.partition.keycomparator.options", keySpec);
  conf.set("mapreduce.partition.keypartitioner.options", "-k1.1,1.1");
  conf.set(MRJobConfig.MAP_OUTPUT_KEY_FIELD_SEPERATOR, " ");

  Job job = MapReduceTestUtil.createJob(conf, inDir, outDir, 1, 1,
              line1 +"\n" + line2 + "\n"); 
  job.setMapperClass(InverseMapper.class);
  job.setReducerClass(Reducer.class);
  job.setOutputKeyClass(Text.class);
  job.setOutputValueClass(LongWritable.class);
  job.setSortComparatorClass(KeyFieldBasedComparator.class);
  job.setPartitionerClass(KeyFieldBasedPartitioner.class);

  job.waitForCompletion(true);
  assertTrue(job.isSuccessful());

  // validate output
  Path[] outputFiles = FileUtil.stat2Paths(getFileSystem().listStatus(outDir,
      new Utils.OutputFileUtils.OutputFilesFilter()));
  if (outputFiles.length > 0) {
    InputStream is = getFileSystem().open(outputFiles[0]);
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    String line = reader.readLine();
    //make sure we get what we expect as the first line, and also
    //that we have two lines (both the lines must end up in the same
    //reducer since the partitioner takes the same key spec for all
    //lines
    if (expect == 1) {
      assertTrue(line.startsWith(line1));
    } else if (expect == 2) {
      assertTrue(line.startsWith(line2));
    }
    line = reader.readLine();
    if (expect == 1) {
      assertTrue(line.startsWith(line2));
    } else if (expect == 2) {
      assertTrue(line.startsWith(line1));
    }
    reader.close();
  }
}