Examples of org.apache.hadoop.zebra.tfile.TFile.Reader

Package org.apache.hadoop.zebra.tfile.TFile

Examples of org.apache.hadoop.zebra.tfile.TFile.Reader

org.apache.hadoop.zebra.tfile.TFile.Reader

    reader.close();
  }


  private void readValueBeforeKey(int count, int recordIndex)
      throws IOException {
    Reader reader =
        new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
    Scanner scanner =
        reader.createScannerByKey(composeSortedKey(KEY, count, recordIndex)
            .getBytes(), null);


    try {
      byte[] vbuf = new byte[BUF_SIZE];
      int vlen = scanner.entry().getValueLength();
      scanner.entry().getValue(vbuf);
      Assert.assertEquals(new String(vbuf, 0, vlen), VALUE + recordIndex);


      byte[] kbuf = new byte[BUF_SIZE];
      int klen = scanner.entry().getKeyLength();
      scanner.entry().getKey(kbuf);
      Assert.assertEquals(new String(kbuf, 0, klen), composeSortedKey(KEY,
          count, recordIndex));
    }
    finally {
      scanner.close();
      reader.close();
    }
  }

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    }
  }


  private void readKeyWithoutValue(int count, int recordIndex)
      throws IOException {
    Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
    Scanner scanner =
        reader.createScannerByKey(composeSortedKey(KEY, count, recordIndex)
            .getBytes(), null);


    try {
      // read the indexed key
      byte[] kbuf1 = new byte[BUF_SIZE];
      int klen1 = scanner.entry().getKeyLength();
      scanner.entry().getKey(kbuf1);
      Assert.assertEquals(new String(kbuf1, 0, klen1), composeSortedKey(KEY,
          count, recordIndex));


      if (scanner.advance() && !scanner.atEnd()) {
        // read the next key following the indexed
        byte[] kbuf2 = new byte[BUF_SIZE];
        int klen2 = scanner.entry().getKeyLength();
        scanner.entry().getKey(kbuf2);
        Assert.assertEquals(new String(kbuf2, 0, klen2), composeSortedKey(KEY,
            count, recordIndex + 1));
      }
    }
    finally {
      scanner.close();
      reader.close();
    }
  }

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    }
  }


  private void readValueWithoutKey(int count, int recordIndex)
      throws IOException {
    Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);


    Scanner scanner =
        reader.createScannerByKey(composeSortedKey(KEY, count, recordIndex)
            .getBytes(), null);


    byte[] vbuf1 = new byte[BUF_SIZE];
    int vlen1 = scanner.entry().getValueLength();
    scanner.entry().getValue(vbuf1);
    Assert.assertEquals(new String(vbuf1, 0, vlen1), VALUE + recordIndex);


    if (scanner.advance() && !scanner.atEnd()) {
      byte[] vbuf2 = new byte[BUF_SIZE];
      int vlen2 = scanner.entry().getValueLength();
      scanner.entry().getValue(vbuf2);
      Assert.assertEquals(new String(vbuf2, 0, vlen2), VALUE
          + (recordIndex + 1));
    }


    scanner.close();
    reader.close();
  }

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    scanner.close();
    reader.close();
  }


  private void readKeyManyTimes(int count, int recordIndex) throws IOException {
    Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);


    Scanner scanner =
        reader.createScannerByKey(composeSortedKey(KEY, count, recordIndex)
            .getBytes(), null);


    // read the indexed key
    byte[] kbuf1 = new byte[BUF_SIZE];
    int klen1 = scanner.entry().getKeyLength();
    scanner.entry().getKey(kbuf1);
    Assert.assertEquals(new String(kbuf1, 0, klen1), composeSortedKey(KEY,
        count, recordIndex));


    klen1 = scanner.entry().getKeyLength();
    scanner.entry().getKey(kbuf1);
    Assert.assertEquals(new String(kbuf1, 0, klen1), composeSortedKey(KEY,
        count, recordIndex));


    klen1 = scanner.entry().getKeyLength();
    scanner.entry().getKey(kbuf1);
    Assert.assertEquals(new String(kbuf1, 0, klen1), composeSortedKey(KEY,
        count, recordIndex));


    scanner.close();
    reader.close();
  }

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  public void seekTFile() throws IOException {
    int miss = 0;
    long totalBytes = 0;
    FSDataInputStream fsdis = fs.open(path);
    Reader reader =
      new Reader(fsdis, fs.getFileStatus(path).getLen(), conf);
    KeySampler kSampler =
        new KeySampler(rng, reader.getFirstKey(), reader.getLastKey(),
            keyLenGen);
    Scanner scanner = reader.createScanner();
    BytesWritable key = new BytesWritable();
    BytesWritable val = new BytesWritable();
    timer.reset();
    timer.start();
    for (int i = 0; i < options.seekCount; ++i) {

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    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);


    Scanner scanner = reader.createScanner();
    readAllRecords(scanner);
    scanner.seekTo(getSomeKey(50));
    assertTrue("location lookup failed", scanner.seekTo(getSomeKey(50)));
    // read the key and see if it matches
    byte[] readKey = readKey(scanner);
    assertTrue("seeked key does not match", Arrays.equals(getSomeKey(50),
        readKey));


    scanner.seekTo(new byte[0]);
    byte[] val1 = readValue(scanner);
    scanner.seekTo(new byte[0]);
    byte[] val2 = readValue(scanner);
    assertTrue(Arrays.equals(val1, val2));
    
    // check for lowerBound
    scanner.lowerBound(getSomeKey(50));
    assertTrue("locaton lookup failed", scanner.currentLocation
        .compareTo(reader.end()) < 0);
    readKey = readKey(scanner);
    assertTrue("seeked key does not match", Arrays.equals(readKey,
        getSomeKey(50)));


    // check for upper bound
    scanner.upperBound(getSomeKey(50));
    assertTrue("location lookup failed", scanner.currentLocation
        .compareTo(reader.end()) < 0);
    readKey = readKey(scanner);
    assertTrue("seeked key does not match", Arrays.equals(readKey,
        getSomeKey(51)));


    scanner.close();
    // test for a range of scanner
    scanner = reader.createScannerByKey(getSomeKey(10), getSomeKey(60));
    readAndCheckbytes(scanner, 10, 50);
    assertFalse(scanner.advance());
    scanner.close();
    reader.close();
    fin.close();
    fs.delete(ncTFile, true);
  }

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    Writer writer = new Writer(fout, minBlockSize, codec, null, conf);
    writeRecords(writer);
    writer.close();
    fout.close();
    FSDataInputStream fin = fs.open(uTfile);
    Reader reader =
        new Reader(fs.open(uTfile), fs.getFileStatus(uTfile).getLen(), conf);


    Scanner scanner = reader.createScanner();
    readAllRecords(scanner);
    scanner.close();
    reader.close();
    fin.close();
    fs.delete(uTfile, true);
  }

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    Writer writer = new Writer(fout, minBlockSize, "none", null, conf);
    someTestingWithMetaBlock(writer, "none");
    writer.close();
    fout.close();
    FSDataInputStream fin = fs.open(mFile);
    Reader reader = new Reader(fin, fs.getFileStatus(mFile).getLen(), conf);
    someReadingWithMetaBlock(reader);
    fs.delete(mFile, true);
    reader.close();
    fin.close();
  }

View Full Code Here

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Related Classes of org.apache.hadoop.zebra.tfile.TFile.Reader

org.apache.hadoop.zebra.tfile.TestTFile

org.apache.hadoop.zebra.tfile.TestTFileByteArrays

org.apache.hadoop.zebra.tfile.TestTFileSeek

org.apache.hadoop.zebra.tfile.TestTFileSplit

org.apache.hadoop.zebra.tfile.TestTFileStreams

org.apache.hadoop.zebra.tfile.TestTFileUnsortedByteArrays

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