List of seekTo() Examples

Examples of seekTo()

org.apache.cassandra.db.FileStruct.seekTo()
org.apache.cassandra.io.SSTableScanner.seekTo()
org.apache.cassandra.io.sstable.SSTableScanner.seekTo()
org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()
SeekTo or just before the passed key. Examine the return code to figure whether we found the key or not. Consider the key stream of all the keys in the file, k[0] .. k[n], where there are n keys in the file. @param key Key to find. @return -1, if key < k[0], no position;0, such that k[i] = key and scanner is left in position i; and 1, such that k[i] < key, and scanner is left in position i. Furthermore, there may be a k[i+1], such that k[i] < key < k[i+1] but there may not be a k[i+1], and next() will return false (EOF). @throws IOException
org.apache.hadoop.io.file.tfile.TFile.Reader.Scanner.seekTo()
org.apache.hadoop.zebra.tfile.TFile.Reader.Scanner.seekTo()
org.apache.lucene.index.DocValuesReader.seekTo()

Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

    assertTrue(storeFileInfo.isLink());


    // Now confirm that I can read from the link
    int count = 1;
    HFileScanner s = hsf.createReader().getScanner(false, false);
    s.seekTo();
    while (s.next()) {
      count++;
    }
    assertEquals((LAST_CHAR - FIRST_CHAR + 1) * (LAST_CHAR - FIRST_CHAR + 1), count);
  }

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

        BloomType.NONE, NoOpDataBlockEncoder.INSTANCE);


    // Now confirm that I can read from the ref to link
    int count = 1;
    HFileScanner s = hsfA.createReader().getScanner(false, false);
    s.seekTo();
    while (s.next()) {
      count++;
    }
    assertTrue(count > 0); // read some rows here

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

    StoreFile hsfB = new StoreFile(this.fs, pathB, testConf, cacheConf,
        BloomType.NONE, NoOpDataBlockEncoder.INSTANCE);


    // Now confirm that I can read from the ref to link
    HFileScanner sB = hsfB.createReader().getScanner(false, false);
    sB.seekTo();
    
    //count++ as seekTo() will advance the scanner
    count++;
    while (sB.next()) {
      count++;

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

      // Test bottom half first.
      // Now test reading from the top.
      boolean first = true;
      ByteBuffer key = null;
      HFileScanner topScanner = top.getScanner(false, false);
      while ((!topScanner.isSeeked() && topScanner.seekTo()) ||
             (topScanner.isSeeked() && topScanner.next())) {
        key = topScanner.getKey();


        if (topScanner.getReader().getComparator().compareFlatKey(key.array(),
          key.arrayOffset(), key.limit(), midkey, 0, midkey.length) < 0) {

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

      }
      LOG.info("Last in top: " + Bytes.toString(Bytes.toBytes(key)));


      first = true;
      HFileScanner bottomScanner = bottom.getScanner(false, false);
      while ((!bottomScanner.isSeeked() && bottomScanner.seekTo()) ||
          bottomScanner.next()) {
        previous = bottomScanner.getKey();
        key = bottomScanner.getKey();
        if (first) {
          first = false;

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

      assertNull(topPath);
      bottom = new StoreFile(this.fs, bottomPath, conf, cacheConf, BloomType.NONE,
          NoOpDataBlockEncoder.INSTANCE).createReader();
      first = true;
      bottomScanner = bottom.getScanner(false, false);
      while ((!bottomScanner.isSeeked() && bottomScanner.seekTo()) ||
          bottomScanner.next()) {
        key = bottomScanner.getKey();
        if (first) {
          first = false;
          keyKV = KeyValue.createKeyValueFromKey(key);

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

  @Override
  public byte[] getFirstKey() {
    if (!firstKeySeeked) {
      HFileScanner scanner = getScanner(true, true, false);
      try {
        if (scanner.seekTo()) {
          this.firstKey = Bytes.toBytes(scanner.getKey());
        }
        firstKeySeeked = true;
      } catch (IOException e) {
        LOG.warn("Failed seekTo first KV in the file", e);

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()

    store.passSchemaMetricsTo(sf);
    HFileReaderV2 reader = (HFileReaderV2) sf.createReader().getHFileReader();
    try {
      // Open a scanner with (on read) caching disabled
      HFileScanner scanner = reader.getScanner(false, false);
      assertTrue(testDescription, scanner.seekTo());
      // Cribbed from io.hfile.TestCacheOnWrite
      long offset = 0;
      HFileBlock prevBlock = null;
      while (offset < reader.getTrailer().getLoadOnOpenDataOffset()) {
        long onDiskSize = -1;

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()


    @Override
    void doRow(int i) throws Exception {
      HFileScanner scanner = this.reader.getScanner(false, true);
      byte [] b = getRandomRow();
      scanner.seekTo(b);
      ByteBuffer k = scanner.getKey();
      PerformanceEvaluationCommons.assertKey(b, k);
      ByteBuffer v = scanner.getValue();
      PerformanceEvaluationCommons.assertValueSize(v.limit(), ROW_LENGTH);
    }

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Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.seekTo()


    @Override
    void doRow(int i) throws Exception {
      HFileScanner scanner = this.reader.getScanner(false, false);
      byte [] b = getRandomRow();
      if (scanner.seekTo(b) != 0) {
        System.out.println("Nonexistent row: " + new String(b));
        return;
      }
      ByteBuffer k = scanner.getKey();
      PerformanceEvaluationCommons.assertKey(b, k);

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