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

    StoreFile refHsf = new StoreFile(this.fs, refPath, true, conf, 
        StoreFile.BloomType.NONE, 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.createReader().getScanner(false, false);
    for(boolean first = true; (!s.isSeeked() && s.seekTo()) || s.next();) {
      ByteBuffer bb = s.getKey();
      kv = KeyValue.createKeyValueFromKey(bb);
      if (first) {
        assertTrue(Bytes.equals(kv.getRow(), midRow));
        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(false, false);
      while ((!topScanner.isSeeked() && topScanner.seekTo()) ||
          (topScanner.isSeeked() && topScanner.next())) {
        key = topScanner.getKey();


        assertTrue(topScanner.getReader().getComparator().compare(key.array(),
          key.arrayOffset(), key.limit(), midkey, 0, midkey.length) >= 0);

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      }
      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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          StoreFile.BloomType.NONE, false).createReader();
      bottom = new StoreFile(this.fs, bottomPath, true, conf, 
          StoreFile.BloomType.NONE, false).createReader();
      bottomScanner = bottom.getScanner(false, false);
      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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          StoreFile.BloomType.NONE, false).createReader();
      bottom = new StoreFile(this.fs, bottomPath, true, conf, 
          StoreFile.BloomType.NONE, false).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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      }


      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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  private void verifyCounts(int countRow1, int countRow2) throws Exception {
    int count1 = 0;
    int count2 = 0;
    for (StoreFile f: this.r.stores.get(COLUMN_FAMILY_TEXT).getStorefiles()) {
      HFileScanner scanner = f.getReader().getScanner(false, false);
      scanner.seekTo();
      do {
        byte [] row = scanner.getKeyValue().getRow();
        if (Bytes.equals(row, STARTROW)) {
          count1++;
        } else if(Bytes.equals(row, secondRowBytes)) {

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

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    final HalfStoreFileReader halfreader = new HalfStoreFileReader(fs, p,
        cacheConf, bottom, DataBlockEncoding.NONE);
    halfreader.loadFileInfo();
    final HFileScanner scanner = halfreader.getScanner(false, false);


    scanner.seekTo();
    KeyValue curr;
    do {
      curr = scanner.getKeyValue();
      KeyValue reseekKv =
          getLastOnCol(curr);

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    final IndexHalfStoreFileReader halfreader =
        new IndexHalfStoreFileReader(fs, p, cacheConf, bottom, DataBlockEncoding.NONE);
    halfreader.loadFileInfo();
    final HFileScanner scanner = halfreader.getScanner(false, false);
    KeyValue getseekTorowKey3 = getSeekToRowKey();
    scanner.seekTo(getseekTorowKey3.getBuffer(), 8, 17);
    boolean next = scanner.next();
    KeyValue keyValue = null;
    if (next) {
      keyValue = scanner.getKeyValue();
    }

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