Package org.apache.hadoop.hbase

Examples of org.apache.hadoop.hbase.KeyValue$RawBytesComparator

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      return filter != null
          && filter.filterRowKey(row, offset, length);
    }

    protected boolean nextRow(byte [] currentRow, int offset, short length) throws IOException {
      KeyValue next;
      while((next = this.storeHeap.peek()) != null && next.matchingRow(currentRow, offset, length)) {
        this.storeHeap.next(MOCKED_LIST);      
      }
      results.clear();
      resetFilters();
      // Calling the hook in CP which allows it to do a fast forward
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      boolean result = false;
      startRegionOperation();
      try {
        // This could be a new thread from the last time we called next().
        MultiVersionConsistencyControl.setThreadReadPoint(this.readPt);
        KeyValue kv = KeyValue.createFirstOnRow(row);
        // use request seek to make use of the lazy seek option. See HBASE-5520
        result = this.storeHeap.requestSeek(kv, true, true);
        if (this.joinedHeap != null) {
          result = this.joinedHeap.requestSeek(kv, true, true) || result;
        }
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      String row = "row-1";
      List<String> columns = generateRandomWords(10000, "column");
      Put p = new Put(Bytes.toBytes(row));
      p.setWriteToWAL(false);
      for (String column : columns) {
        KeyValue kv = KeyValueTestUtil.create(row, family, column, 0, valueString);
        p.add(kv);
      }
      region.put(p);

      Get get = new Get(row.getBytes());
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      String row = "row-1";
      List<String> columns = generateRandomWords(10000, "column");
      Put p = new Put(Bytes.toBytes(row));
      p.setWriteToWAL(false);
      for (String column : columns) {
        KeyValue kv = KeyValueTestUtil.create(row, family, column, 0, valueString);
        p.add(kv);
      }
      region.put(p);

      Get get = new Get(row.getBytes());
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    /* Will pass both */
    byte [] rowkey = Bytes.toBytes("yyyyyyyyy");
    for (int i = 0; i < MAX_PAGES - 1; i++) {
      assertFalse(filterMPONE.filterRowKey(rowkey, 0, rowkey.length));
      assertFalse(filterMPONE.filterRow());
      KeyValue kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(i),
        Bytes.toBytes(i));
      assertTrue(Filter.ReturnCode.INCLUDE == filterMPONE.filterKeyValue(kv));
    }

    /* Only pass PageFilter */
    rowkey = Bytes.toBytes("z");
    assertFalse(filterMPONE.filterRowKey(rowkey, 0, rowkey.length));
    assertFalse(filterMPONE.filterRow());
    KeyValue kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(0),
        Bytes.toBytes(0));
    assertTrue(Filter.ReturnCode.INCLUDE == filterMPONE.filterKeyValue(kv));

    /* PageFilter will fail now, but should pass because we match yyy */
    rowkey = Bytes.toBytes("yyy");
    assertFalse(filterMPONE.filterRowKey(rowkey, 0, rowkey.length));
    assertFalse(filterMPONE.filterRow());
    kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(0),
        Bytes.toBytes(0));
    assertTrue(Filter.ReturnCode.INCLUDE == filterMPONE.filterKeyValue(kv));

    /* We should filter any row */
    rowkey = Bytes.toBytes("z");
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    filterMPALL.reset();
    assertFalse(filterMPALL.filterAllRemaining());
    byte [] rowkey = Bytes.toBytes("yyyyyyyyy");
    for (int i = 0; i < MAX_PAGES - 1; i++) {
      assertFalse(filterMPALL.filterRowKey(rowkey, 0, rowkey.length));
      KeyValue kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(i),
        Bytes.toBytes(i));
      assertTrue(Filter.ReturnCode.INCLUDE == filterMPALL.filterKeyValue(kv));
    }
    filterMPALL.reset();
    rowkey = Bytes.toBytes("z");
    assertTrue(filterMPALL.filterRowKey(rowkey, 0, rowkey.length));
    // Should fail here; row should be filtered out.
    KeyValue kv = new KeyValue(rowkey, rowkey, rowkey, rowkey);
    assertTrue(Filter.ReturnCode.NEXT_ROW == filterMPALL.filterKeyValue(kv));
  }
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    /* We should be able to fill MAX_PAGES without incrementing page counter */
    byte [] rowkey = Bytes.toBytes("yyyyyyyy");
    for (int i = 0; i < MAX_PAGES; i++) {
      assertFalse(filterMPONE.filterRowKey(rowkey, 0, rowkey.length));
      KeyValue kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(i),
          Bytes.toBytes(i));
        assertTrue(Filter.ReturnCode.INCLUDE == filterMPONE.filterKeyValue(kv));
      assertFalse(filterMPONE.filterRow());
    }

    /* Now let's fill the page filter */
    rowkey = Bytes.toBytes("xxxxxxx");
    for (int i = 0; i < MAX_PAGES; i++) {
      assertFalse(filterMPONE.filterRowKey(rowkey, 0, rowkey.length));
      KeyValue kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(i),
          Bytes.toBytes(i));
        assertTrue(Filter.ReturnCode.INCLUDE == filterMPONE.filterKeyValue(kv));
      assertFalse(filterMPONE.filterRow());
    }

    /* We should still be able to include even though page filter is at max */
    rowkey = Bytes.toBytes("yyy");
    for (int i = 0; i < MAX_PAGES; i++) {
      assertFalse(filterMPONE.filterRowKey(rowkey, 0, rowkey.length));
      KeyValue kv = new KeyValue(rowkey, rowkey, Bytes.toBytes(i),
          Bytes.toBytes(i));
        assertTrue(Filter.ReturnCode.INCLUDE == filterMPONE.filterKeyValue(kv));
      assertFalse(filterMPONE.filterRow());
    }
  }
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  /**
   * Test pass-thru of hints.
   */
  public void testHintPassThru() throws Exception {

    final KeyValue minKeyValue = new KeyValue(Bytes.toBytes(0L), null, null);
    final KeyValue maxKeyValue = new KeyValue(Bytes.toBytes(Long.MAX_VALUE),
        null, null);

    Filter filterNoHint = new FilterBase() {
      @Override
      public void readFields(DataInput arg0) throws IOException {}

      @Override
      public void write(DataOutput arg0) throws IOException {}
    };

    Filter filterMinHint = new FilterBase() {
      @Override
      public KeyValue getNextKeyHint(KeyValue currentKV) {
        return minKeyValue;
      }

      @Override
      public void readFields(DataInput arg0) throws IOException {}

      @Override
      public void write(DataOutput arg0) throws IOException {}
    };

    Filter filterMaxHint = new FilterBase() {
      @Override
      public KeyValue getNextKeyHint(KeyValue currentKV) {
        return new KeyValue(Bytes.toBytes(Long.MAX_VALUE), null, null);
      }

      @Override
      public void readFields(DataInput arg0) throws IOException {}

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    this.readRequestsCount.increment();
    this.opMetrics.setReadRequestCountMetrics(this.readRequestsCount.get());  
    try {
      Store store = getStore(family);
      // get the closest key. (HStore.getRowKeyAtOrBefore can return null)
      KeyValue key = store.getRowKeyAtOrBefore(row);
      Result result = null;
      if (key != null) {
        Get get = new Get(key.getRow());
        get.addFamily(family);
        result = get(get, null);
      }
      if (coprocessorHost != null) {
        coprocessorHost.postGetClosestRowBefore(row, family, result);
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            continue;
          }
          if (result.size() > count) {
            throw new RuntimeException("Unexpected size: " + result.size());
          }
          KeyValue getkv = result.get(count - 1);
          Bytes.putBytes(kv.getBuffer(), kv.getTimestampOffset(),
              getkv.getBuffer(), getkv.getTimestampOffset(), Bytes.SIZEOF_LONG);
        } else {
          kv.updateLatestStamp(byteNow);
        }
      }
    }
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