示例#1
0
  public MemtableUnfilteredPartitionIterator makePartitionIterator(
      final ColumnFilter columnFilter, final DataRange dataRange, final boolean isForThrift) {
    AbstractBounds<PartitionPosition> keyRange = dataRange.keyRange();

    boolean startIsMin = keyRange.left.isMinimum();
    boolean stopIsMin = keyRange.right.isMinimum();

    boolean isBound = keyRange instanceof Bounds;
    boolean includeStart = isBound || keyRange instanceof IncludingExcludingBounds;
    boolean includeStop = isBound || keyRange instanceof Range;
    Map<PartitionPosition, AtomicBTreePartition> subMap;
    if (startIsMin)
      subMap = stopIsMin ? partitions : partitions.headMap(keyRange.right, includeStop);
    else
      subMap =
          stopIsMin
              ? partitions.tailMap(keyRange.left, includeStart)
              : partitions.subMap(keyRange.left, includeStart, keyRange.right, includeStop);

    int minLocalDeletionTime = Integer.MAX_VALUE;

    // avoid iterating over the memtable if we purge all tombstones
    if (cfs.getCompactionStrategyManager().onlyPurgeRepairedTombstones())
      minLocalDeletionTime = findMinLocalDeletionTime(subMap.entrySet().iterator());

    final Iterator<Map.Entry<PartitionPosition, AtomicBTreePartition>> iter =
        subMap.entrySet().iterator();

    return new MemtableUnfilteredPartitionIterator(
        cfs, iter, isForThrift, minLocalDeletionTime, columnFilter, dataRange);
  }
  /** headMap returns map with keys in requested range */
  public void testTailMapContents() {
    ConcurrentNavigableMap map = map5();
    SortedMap sm = map.tailMap(two);
    assertFalse(sm.containsKey(one));
    assertTrue(sm.containsKey(two));
    assertTrue(sm.containsKey(three));
    assertTrue(sm.containsKey(four));
    assertTrue(sm.containsKey(five));
    Iterator i = sm.keySet().iterator();
    Object k;
    k = (Integer) (i.next());
    assertEquals(two, k);
    k = (Integer) (i.next());
    assertEquals(three, k);
    k = (Integer) (i.next());
    assertEquals(four, k);
    k = (Integer) (i.next());
    assertEquals(five, k);
    assertFalse(i.hasNext());

    Iterator ei = sm.entrySet().iterator();
    Map.Entry e;
    e = (Map.Entry) (ei.next());
    assertEquals(two, e.getKey());
    assertEquals("B", e.getValue());
    e = (Map.Entry) (ei.next());
    assertEquals(three, e.getKey());
    assertEquals("C", e.getValue());
    e = (Map.Entry) (ei.next());
    assertEquals(four, e.getKey());
    assertEquals("D", e.getValue());
    e = (Map.Entry) (ei.next());
    assertEquals(five, e.getKey());
    assertEquals("E", e.getValue());
    assertFalse(i.hasNext());

    SortedMap ssm = sm.tailMap(four);
    assertEquals(four, ssm.firstKey());
    assertEquals(five, ssm.lastKey());
    assertEquals("D", ssm.remove(four));
    assertEquals(1, ssm.size());
    assertEquals(3, sm.size());
    assertEquals(4, map.size());
  }
  /** headMap returns map with keys in requested range */
  public void testDescendingTailMapContents() {
    ConcurrentNavigableMap map = dmap5();
    SortedMap sm = map.tailMap(m2);
    assertFalse(sm.containsKey(m1));
    assertTrue(sm.containsKey(m2));
    assertTrue(sm.containsKey(m3));
    assertTrue(sm.containsKey(m4));
    assertTrue(sm.containsKey(m5));
    Iterator i = sm.keySet().iterator();
    Object k;
    k = (Integer) (i.next());
    assertEquals(m2, k);
    k = (Integer) (i.next());
    assertEquals(m3, k);
    k = (Integer) (i.next());
    assertEquals(m4, k);
    k = (Integer) (i.next());
    assertEquals(m5, k);
    assertFalse(i.hasNext());

    Iterator ei = sm.entrySet().iterator();
    Map.Entry e;
    e = (Map.Entry) (ei.next());
    assertEquals(m2, e.getKey());
    assertEquals("B", e.getValue());
    e = (Map.Entry) (ei.next());
    assertEquals(m3, e.getKey());
    assertEquals("C", e.getValue());
    e = (Map.Entry) (ei.next());
    assertEquals(m4, e.getKey());
    assertEquals("D", e.getValue());
    e = (Map.Entry) (ei.next());
    assertEquals(m5, e.getKey());
    assertEquals("E", e.getValue());
    assertFalse(i.hasNext());

    SortedMap ssm = sm.tailMap(m4);
    assertEquals(m4, ssm.firstKey());
    assertEquals(m5, ssm.lastKey());
    assertEquals("D", ssm.remove(m4));
    assertEquals(1, ssm.size());
    assertEquals(3, sm.size());
    assertEquals(4, map.size());
  }