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

Package org.apache.hadoop.hbase.io.hfile

Class org.apache.hadoop.hbase.io.hfile.HFileScanner

Examples of org.apache.hadoop.hbase.io.hfile.HFileScanner.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

      }


      if (verifyBulkLoads) {
        KeyValue prevKV = null;
        HFileScanner scanner = reader.getScanner(false, false, false);
        scanner.seekTo();
        do {
          KeyValue kv = scanner.getKeyValue();
          if (prevKV != null) {
            if (Bytes.compareTo(prevKV.getBuffer(), prevKV.getRowOffset(),
                prevKV.getRowLength(), kv.getBuffer(), kv.getRowOffset(),

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    @Override
    void doRow(int i) throws Exception {
      HFileScanner scanner = this.reader.getScanner();
      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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    @Override
    void doRow(int i) throws Exception {
      HFileScanner scanner = this.reader.getScanner();
      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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    }


    @Override
    void doRow(int i) throws Exception {
      HFileScanner scanner = this.reader.getScanner();
      scanner.seekTo(getGaussianRandomRowBytes());
      for (int ii = 0; ii < 30; ii++) {
        if (!scanner.next()) {
          System.out.println("NOTHING FOLLOWS");
        }
        scanner.getKey();

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    int count = 0;
    boolean containsStartRow = false;
    for (StoreFile f: this.r.stores.get(COLUMN_FAMILY_TEXT).getStorefiles().
        values()) {
      HFileScanner scanner = f.getReader().getScanner(false);
      scanner.seekTo();
      do {
        byte [] row = scanner.getKeyValue().getRow();
        if (Bytes.equals(row, STARTROW)) {
          containsStartRow = true;
          count++;

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  private int count() throws IOException {
    int count = 0;
    for (StoreFile f: this.r.stores.
        get(COLUMN_FAMILY_TEXT).getStorefiles().values()) {
      HFileScanner scanner = f.getReader().getScanner();
      if (!scanner.seekTo()) {
        continue;
      }
      do {
        count++;
      } while(scanner.next());

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    Path refPath = StoreFile.split(fs, dir, hsf, reader.midkey(), Range.top);
    StoreFile refHsf = new StoreFile(this.fs, refPath, true, conf, false);
    // Now confirm that I can read from the reference and that it only gets
    // keys from top half of the file.
    HFileScanner s = refHsf.getReader().getScanner();
    for(boolean first = true; (!s.isSeeked() && s.seekTo()) || s.next();) {
      ByteBuffer bb = s.getKey();
      hsk = HStoreKey.create(bb.array(), bb.arrayOffset(), bb.limit());
      if (first) {
        assertTrue(Bytes.equals(hsk.getRow(), midkey));
        first = false;

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      // Test bottom half first.
      // Now test reading from the top.
      boolean first = true;
      ByteBuffer key = null;
      HFileScanner topScanner = top.getScanner();
      while ((!topScanner.isSeeked() && topScanner.seekTo()) ||
          (topScanner.isSeeked() && topScanner.next())) {
        key = topScanner.getKey();
        
        assertTrue(topScanner.getReader().getComparator().compare(key.array(),
          key.arrayOffset(), key.limit(), midkeyBytes, 0, midkeyBytes.length) >= 0);

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      }
      LOG.info("Last in top: " + Bytes.toString(Bytes.toBytes(key)));
      
      first = true;
      HFileScanner bottomScanner = bottom.getScanner();
      while ((!bottomScanner.isSeeked() && bottomScanner.seekTo()) ||
          bottomScanner.next()) {
        previous = bottomScanner.getKey();
        key = bottomScanner.getKey();
        if (first) {
          first = false;

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        Range.bottom);
      top = new StoreFile(this.fs, topPath, true, conf, false).getReader();
      bottom = new StoreFile(this.fs, bottomPath, true, conf, false).getReader();
      bottomScanner = bottom.getScanner();
      int count = 0;
      while ((!bottomScanner.isSeeked() && bottomScanner.seekTo()) ||
          bottomScanner.next()) {
        count++;
      }
      // When badkey is < than the bottom, should return no values.
      assertTrue(count == 0);

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