Package org.apache.hadoop.hbase.KeyValue

Examples of org.apache.hadoop.hbase.KeyValue.KVComparator

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    cmp = c.compare(greater,less);
    assertTrue(cmp > 0);
  }

  public void testFirstLastOnRow() {
    final KVComparator c = KeyValue.COMPARATOR;
    long ts = 1;

    // These are listed in sort order (ie: every one should be less
    // than the one on the next line).
    final KeyValue firstOnRowA = KeyValue.createFirstOnRow(rowA);
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    // Meta compares
    KeyValue aaa = new KeyValue(
        Bytes.toBytes("TestScanMultipleVersions,row_0500,1236020145502"), now);
    KeyValue bbb = new KeyValue(
        Bytes.toBytes("TestScanMultipleVersions,,99999999999999"), now);
    KVComparator c = new KeyValue.MetaComparator();
    assertTrue(c.compare(bbb, aaa) < 0);

    KeyValue aaaa = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,,1236023996656"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1236024396271L,
        (byte[])null);
    assertTrue(c.compare(aaaa, bbb) < 0);

    KeyValue x = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,row_0500,1236034574162"),
        Bytes.toBytes("info"), Bytes.toBytes(""), 9223372036854775807L,
        (byte[])null);
    KeyValue y = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,row_0500,1236034574162"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1236034574912L,
        (byte[])null);
    assertTrue(c.compare(x, y) < 0);
    comparisons(new KeyValue.MetaComparator());
    comparisons(new KeyValue.KVComparator());
    metacomparisons(new KeyValue.MetaComparator());
  }
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    // 'fami:qf1' < 'fami:qf2'. They have commonPrefix + 6 same prefix bytes.
    assertKVLessWithoutRow(c, commonLength + 6, kv0_1, kv0_2);
  }

  public void testFirstLastOnRow() {
    final KVComparator c = KeyValue.COMPARATOR;
    long ts = 1;
    byte[] bufferA = new byte[128];
    int offsetA = 0;
    byte[] bufferB = new byte[128];
    int offsetB = 7;
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  /**
   * See HBASE-7845
   */
  public void testGetShortMidpointKey() {
    final KVComparator keyComparator = KeyValue.COMPARATOR;
    //verify that faked shorter rowkey could be generated
    long ts = 5;
    KeyValue kv1 = new KeyValue(Bytes.toBytes("the quick brown fox"), family, qualA, ts, Type.Put);
    KeyValue kv2 = new KeyValue(Bytes.toBytes("the who test text"), family, qualA, ts, Type.Put);
    byte[] newKey = keyComparator.getShortMidpointKey(kv1.getKey(), kv2.getKey());
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), newKey) < 0);
    assertTrue(keyComparator.compareFlatKey(newKey, kv2.getKey()) < 0);
    short newRowLength = Bytes.toShort(newKey, 0);
    byte[] expectedArray = Bytes.toBytes("the r");
    Bytes.equals(newKey, KeyValue.ROW_LENGTH_SIZE, newRowLength, expectedArray, 0,
      expectedArray.length);

    //verify: same with "row + family + qualifier", return rightKey directly
    kv1 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualA, 5, Type.Put);
    kv2 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualA, 0, Type.Put);
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), kv2.getKey()) < 0);
    newKey = keyComparator.getShortMidpointKey(kv1.getKey(), kv2.getKey());
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), newKey) < 0);
    assertTrue(keyComparator.compareFlatKey(newKey, kv2.getKey()) == 0);
    kv1 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualA, -5, Type.Put);
    kv2 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualA, -10, Type.Put);
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), kv2.getKey()) < 0);
    newKey = keyComparator.getShortMidpointKey(kv1.getKey(), kv2.getKey());
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), newKey) < 0);
    assertTrue(keyComparator.compareFlatKey(newKey, kv2.getKey()) == 0);

    // verify: same with row, different with qualifier
    kv1 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualA, 5, Type.Put);
    kv2 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualB, 5, Type.Put);
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), kv2.getKey()) < 0);
    newKey = keyComparator.getShortMidpointKey(kv1.getKey(), kv2.getKey());
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), newKey) < 0);
    assertTrue(keyComparator.compareFlatKey(newKey, kv2.getKey()) < 0);
    KeyValue newKeyValue = KeyValue.createKeyValueFromKey(newKey);
    assertTrue(Arrays.equals(newKeyValue.getFamily(),family));
    assertTrue(Arrays.equals(newKeyValue.getQualifier(),qualB));
    assertTrue(newKeyValue.getTimestamp() == HConstants.LATEST_TIMESTAMP);
    assertTrue(newKeyValue.getTypeByte() == Type.Maximum.getCode());

    //verify metaKeyComparator's getShortMidpointKey output
    final KVComparator metaKeyComparator = KeyValue.META_COMPARATOR;
    kv1 = new KeyValue(Bytes.toBytes("ilovehbase123"), family, qualA, 5, Type.Put);
    kv2 = new KeyValue(Bytes.toBytes("ilovehbase234"), family, qualA, 0, Type.Put);
    newKey = metaKeyComparator.getShortMidpointKey(kv1.getKey(), kv2.getKey());
    assertTrue(metaKeyComparator.compareFlatKey(kv1.getKey(), newKey) < 0);
    assertTrue(metaKeyComparator.compareFlatKey(newKey, kv2.getKey()) == 0);

    //verify common fix scenario
    kv1 = new KeyValue(Bytes.toBytes("ilovehbase"), family, qualA, ts, Type.Put);
    kv2 = new KeyValue(Bytes.toBytes("ilovehbaseandhdfs"), family, qualA, ts, Type.Put);
    assertTrue(keyComparator.compareFlatKey(kv1.getKey(), kv2.getKey()) < 0);
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                        .withIncludesTags(useTags)
                        .withHBaseCheckSum(true).build();
    HFileBlock.FSReader blockReader =
        new HFileBlock.FSReaderV2(fsdis, fileSize, meta);
// Comparator class name is stored in the trailer in version 2.
    KVComparator comparator = trailer.createComparator();
    HFileBlockIndex.BlockIndexReader dataBlockIndexReader =
        new HFileBlockIndex.BlockIndexReader(comparator,
            trailer.getNumDataIndexLevels());
    HFileBlockIndex.BlockIndexReader metaBlockIndexReader =
        new HFileBlockIndex.BlockIndexReader(
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  }

  public void setComparatorClass(Class<? extends KVComparator> klass) {
    // Is the comparator instantiable?
    try {
      KVComparator comp = klass.newInstance();

      // HFile V2 legacy comparator class names.
      if (KeyValue.COMPARATOR.getClass().equals(klass)) {
        comparatorClassName = KeyValue.COMPARATOR.getLegacyKeyComparatorName();
      } else if (KeyValue.META_COMPARATOR.getClass().equals(klass)) {
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  public void testMoreComparisons() throws Exception {
    // Root compares
    long now = System.currentTimeMillis();
    KeyValue a = new KeyValue(Bytes.toBytes(".META.,,99999999999999"), now);
    KeyValue b = new KeyValue(Bytes.toBytes(".META.,,1"), now);
    KVComparator c = new KeyValue.RootComparator();
    assertTrue(c.compare(b, a) < 0);
    KeyValue aa = new KeyValue(Bytes.toBytes(".META.,,1"), now);
    KeyValue bb = new KeyValue(Bytes.toBytes(".META.,,1"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1235943454602L,
        (byte[])null);
    assertTrue(c.compare(aa, bb) < 0);

    // Meta compares
    KeyValue aaa = new KeyValue(
        Bytes.toBytes("TestScanMultipleVersions,row_0500,1236020145502"), now);
    KeyValue bbb = new KeyValue(
        Bytes.toBytes("TestScanMultipleVersions,,99999999999999"), now);
    c = new KeyValue.MetaComparator();
    assertTrue(c.compare(bbb, aaa) < 0);

    KeyValue aaaa = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,,1236023996656"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1236024396271L,
        (byte[])null);
    assertTrue(c.compare(aaaa, bbb) < 0);

    KeyValue x = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,row_0500,1236034574162"),
        Bytes.toBytes("info"), Bytes.toBytes(""), 9223372036854775807L,
        (byte[])null);
    KeyValue y = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,row_0500,1236034574162"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1236034574912L,
        (byte[])null);
    assertTrue(c.compare(x, y) < 0);
    comparisons(new KeyValue.MetaComparator());
    comparisons(new KeyValue.KVComparator());
    metacomparisons(new KeyValue.RootComparator());
    metacomparisons(new KeyValue.MetaComparator());
  }
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    // 'fami:qf1' < 'fami:qf2'. They have commonPrefix + 6 same prefix bytes.
    assertKVLessWithoutRow(c, commonLength + 6, kv0_1, kv0_2);
  }

  public void testFirstLastOnRow() {
    final KVComparator c = KeyValue.COMPARATOR;
    long ts = 1;

    // These are listed in sort order (ie: every one should be less
    // than the one on the next line).
    final KeyValue firstOnRowA = KeyValue.createFirstOnRow(rowA);
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  public void testMoreComparisons() throws Exception {
    // Root compares
    long now = System.currentTimeMillis();
    KeyValue a = new KeyValue(Bytes.toBytes(".META.,,99999999999999"), now);
    KeyValue b = new KeyValue(Bytes.toBytes(".META.,,1"), now);
    KVComparator c = new KeyValue.RootComparator();
    assertTrue(c.compare(b, a) < 0);
    KeyValue aa = new KeyValue(Bytes.toBytes(".META.,,1"), now);
    KeyValue bb = new KeyValue(Bytes.toBytes(".META.,,1"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1235943454602L,
        (byte[])null);
    assertTrue(c.compare(aa, bb) < 0);

    // Meta compares
    KeyValue aaa = new KeyValue(
        Bytes.toBytes("TestScanMultipleVersions,row_0500,1236020145502"), now);
    KeyValue bbb = new KeyValue(
        Bytes.toBytes("TestScanMultipleVersions,,99999999999999"), now);
    c = new KeyValue.MetaComparator();
    assertTrue(c.compare(bbb, aaa) < 0);

    KeyValue aaaa = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,,1236023996656"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1236024396271L,
        (byte[])null);
    assertTrue(c.compare(aaaa, bbb) < 0);

    KeyValue x = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,row_0500,1236034574162"),
        Bytes.toBytes("info"), Bytes.toBytes(""), 9223372036854775807L,
        (byte[])null);
    KeyValue y = new KeyValue(Bytes.toBytes("TestScanMultipleVersions,row_0500,1236034574162"),
        Bytes.toBytes("info"), Bytes.toBytes("regioninfo"), 1236034574912L,
        (byte[])null);
    assertTrue(c.compare(x, y) < 0);
    comparisons(new KeyValue.MetaComparator());
    comparisons(new KeyValue.KVComparator());
    metacomparisons(new KeyValue.RootComparator());
    metacomparisons(new KeyValue.MetaComparator());
  }
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    cmp = c.compare(greater,less);
    assertTrue(cmp > 0);
  }

  public void testFirstLastOnRow() {
    final KVComparator c = KeyValue.COMPARATOR;
    long ts = 1;

    // These are listed in sort order (ie: every one should be less
    // than the one on the next line).
    final KeyValue firstOnRowA = KeyValue.createFirstOnRow(rowA);
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