Java Code Examples for org.apache.hadoop.io.file.tfile.TFile.Reader.Scanner#seekTo()

The following examples show how to use org.apache.hadoop.io.file.tfile.TFile.Reader.Scanner#seekTo() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: TestTFileByteArrays.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
private void checkBlockIndex(int recordIndex, int blockIndexExpected) throws IOException {
  Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
  Scanner scanner = reader.createScanner();
  scanner.seekTo(composeSortedKey(KEY, recordIndex).getBytes());
  Assert.assertEquals(blockIndexExpected, scanner.currentLocation
      .getBlockIndex());
  scanner.close();
  reader.close();
}
Example 2
Source File: TestTFileByteArrays.java    From big-c with Apache License 2.0 5 votes vote down vote up 
private void checkBlockIndex(int recordIndex, int blockIndexExpected) throws IOException {
  Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
  Scanner scanner = reader.createScanner();
  scanner.seekTo(composeSortedKey(KEY, recordIndex).getBytes());
  Assert.assertEquals(blockIndexExpected, scanner.currentLocation
      .getBlockIndex());
  scanner.close();
  reader.close();
}
Example 3
Source File: TestTFileByteArrays.java    From RDFS with Apache License 2.0 5 votes vote down vote up 
private void checkBlockIndex(int recordIndex, int blockIndexExpected) throws IOException {
  Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
  Scanner scanner = reader.createScanner();
  scanner.seekTo(composeSortedKey(KEY, recordIndex).getBytes());
  Assert.assertEquals(blockIndexExpected, scanner.currentLocation
      .getBlockIndex());
  scanner.close();
  reader.close();
}
Example 4
Source File: TestTFileByteArrays.java    From hadoop-gpu with Apache License 2.0 5 votes vote down vote up 
private void checkBlockIndex(int count, int recordIndex,
    int blockIndexExpected) throws IOException {
  Reader reader = new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
  Scanner scanner = reader.createScanner();
  scanner.seekTo(composeSortedKey(KEY, count, recordIndex).getBytes());
  Assert.assertEquals(blockIndexExpected, scanner.currentLocation
      .getBlockIndex());
  scanner.close();
  reader.close();
}
Example 5
Source File: TestTFile.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
/**
 * 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);

  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);
}
Example 6
Source File: TestTFileByteArrays.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
Location locate(Scanner scanner, byte[] key) throws IOException {
  if (scanner.seekTo(key) == true) {
    return scanner.currentLocation;
  }
  return scanner.endLocation;
}
Example 7
Source File: TestTFile.java    From big-c with Apache License 2.0 4 votes vote down vote up 
/**
 * 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);

  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);
}
Example 8
Source File: TestTFileByteArrays.java    From big-c with Apache License 2.0 4 votes vote down vote up 
Location locate(Scanner scanner, byte[] key) throws IOException {
  if (scanner.seekTo(key) == true) {
    return scanner.currentLocation;
  }
  return scanner.endLocation;
}
Example 9
Source File: TestTFile.java    From RDFS with Apache License 2.0 4 votes vote down vote up 
/**
 * 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);

  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);
}
Example 10
Source File: TestTFileByteArrays.java    From RDFS with Apache License 2.0 4 votes vote down vote up 
Location locate(Scanner scanner, byte[] key) throws IOException {
  if (scanner.seekTo(key) == true) {
    return scanner.currentLocation;
  }
  return scanner.endLocation;
}
Example 11
Source File: TestTFile.java    From hadoop-gpu with Apache License 2.0 4 votes vote down vote up 
/**
 * 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);

  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.createScanner(getSomeKey(10), getSomeKey(60));
  readAndCheckbytes(scanner, 10, 50);
  assertFalse(scanner.advance());
  scanner.close();
  reader.close();
  fin.close();
  fs.delete(ncTFile, true);
}
Example 12
Source File: TestTFileByteArrays.java    From hadoop-gpu with Apache License 2.0 4 votes vote down vote up 
Location locate(Scanner scanner, byte[] key) throws IOException {
  if (scanner.seekTo(key) == true) {
    return scanner.currentLocation;
  }
  return scanner.endLocation;
}