Package org.apache.hadoop.io.file.tfile.TFile

Examples of org.apache.hadoop.io.file.tfile.TFile.Writer

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    Configuration conf = new Configuration();
    Path path = new Path(ROOT, name);
    FileSystem fs = path.getFileSystem(conf);
    FSDataOutputStream out = fs.create(path);
    try {
    TFile.Writer writer = new Writer(out, BLOCK_SIZE, "gz",
        jClassLongWritableComparator, conf);
      try {
        LongWritable key = new LongWritable(0);
        for (long i=0; i<NENTRY; ++i) {
          key.set(cube(i-NENTRY/2));
          DataOutputStream dos = writer.prepareAppendKey(-1);
          try {
            key.write(dos);
          } finally {
            dos.close();
          }
          dos = writer.prepareAppendValue(-1);
          try {
            dos.write(buildValue(i).getBytes());
          } finally {
            dos.close();
          }
        }
      } finally {
        writer.close();
      }
    } finally {
      out.close();
    }
   
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  void createFile(int count, String compress) throws IOException {
    conf = new Configuration();
    path = new Path(ROOT, outputFile + "." + compress);
    fs = path.getFileSystem(conf);
    FSDataOutputStream out = fs.create(path);
    Writer writer = new Writer(out, BLOCK_SIZE, compress, comparator, conf);

    int nx;
    for (nx = 0; nx < count; nx++) {
      byte[] key = composeSortedKey(KEY, count, nx).getBytes();
      byte[] value = (VALUE + nx).getBytes();
      writer.append(key, value);
    }
    writer.close();
    out.close();
  }
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  public void setUp() throws IOException {
    conf = new Configuration();
    path = new Path(ROOT, outputFile);
    fs = path.getFileSystem(conf);
    out = fs.create(path);
    writer = new Writer(out, BLOCK_SIZE, compression, null, conf);
    writer.append("keyZ".getBytes(), "valueZ".getBytes());
    writer.append("keyM".getBytes(), "valueM".getBytes());
    writer.append("keyN".getBytes(), "valueN".getBytes());
    writer.append("keyA".getBytes(), "valueA".getBytes());
    closeOutput();
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  public void setUp() throws IOException {
    conf = new Configuration();
    path = new Path(ROOT, outputFile);
    fs = path.getFileSystem(conf);
    out = fs.create(path);
    writer = new Writer(out, BLOCK_SIZE, compression, comparator, conf);
  }
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    if (skip)
      return;
    closeOutput();
    out = fs.create(path);
    try {
      writer = new Writer(out, BLOCK_SIZE, "BAD", comparator, conf);
      Assert.fail("Error on handling invalid compression codecs.");
    }
    catch (Exception e) {
      // noop, expecting exceptions
      // e.printStackTrace();
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    closeOutput();
    out = fs.create(path);
    out.write(123);

    try {
      writer = new Writer(out, BLOCK_SIZE, compression, comparator, conf);
      Assert.fail("Failed to catch file write not at position 0.");
    }
    catch (Exception e) {
      // noop, expecting exceptions
    }
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  }

  // bad comparator format
  public void testFailureBadComparatorNames() throws IOException {
    try {
      writer = new Writer(out, BLOCK_SIZE, compression, "badcmp", conf);
      Assert.fail("Failed to catch unsupported comparator names");
    }
    catch (Exception e) {
      // noop, expecting exceptions
      e.printStackTrace();
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  // jclass that doesn't exist
  public void testFailureBadJClassNames() throws IOException {
    try {
      writer =
          new Writer(out, BLOCK_SIZE, compression,
              "jclass: some.non.existence.clazz", conf);
      Assert.fail("Failed to catch unsupported comparator names");
    }
    catch (Exception e) {
      // noop, expecting exceptions
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  // class exists but not a RawComparator
  public void testFailureBadJClasses() throws IOException {
    try {
      writer =
          new Writer(out, BLOCK_SIZE, compression,
              "jclass:org.apache.hadoop.io.file.tfile.Chunk", conf);
      Assert.fail("Failed to catch unsupported comparator names");
    }
    catch (Exception e) {
      // noop, expecting exceptions
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   * test none codecs
   */
  void basicWithSomeCodec(String codec) throws IOException {
    Path ncTFile = new Path(ROOT, "basic.tfile");
    FSDataOutputStream fout = createFSOutput(ncTFile);
    Writer writer = new Writer(fout, minBlockSize, codec, "memcmp", conf);
    writeRecords(writer);
    fout.close();
    FSDataInputStream fin = fs.open(ncTFile);
    Reader reader =
        new Reader(fs.open(ncTFile), fs.getFileStatus(ncTFile).getLen(), conf);
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Related Classes of org.apache.hadoop.io.file.tfile.TFile.Writer

  • org.apache.hadoop.io.file.tfile.TestTFile
  • org.apache.hadoop.io.file.tfile.TestTFileByteArrays
  • org.apache.hadoop.io.file.tfile.TestTFileComparator2
  • org.apache.hadoop.io.file.tfile.TestTFileComparators
  • org.apache.hadoop.io.file.tfile.TestTFileSeek
  • org.apache.hadoop.io.file.tfile.TestTFileSplit
  • org.apache.hadoop.io.file.tfile.TestTFileStreams
  • org.apache.hadoop.io.file.tfile.TestTFileUnsortedByteArrays
  • org.apache.pig.impl.io.TFileRecordWriter
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