Ejemplo n.º 1
0
  //
  // Verify that, after replacing a hole and the highest-offset extent in a
  // two entry map with one that leaves a byte of the replaced extent
  // protruding:
  //  -   The resulting map has the correct number of entries.
  //  -   The protrusion from the high end of the map properly appears in
  //      the resulting map.
  //
  // This test recreates the circumstances of a bug observed while testing
  // the BufferCache class.
  //
  @Test
  public final void testReplaceExtentsR0() {
    ByteBuffer b00_01 = ByteBuffer.wrap("0".getBytes());
    ByteBuffer b02_04 = ByteBuffer.wrap("23".getBytes());
    ExtentBuffer eb00_01 = new ExtentBuffer(0L, b00_01);
    ExtentBuffer eb02_04 = new ExtentBuffer(2L, b02_04);
    ExtentBufferMap m00_04 = new ExtentBufferMap();
    m00_04.put(eb00_01);
    m00_04.put(eb02_04);

    ByteBuffer b01_03 = ByteBuffer.wrap("ab".getBytes());
    ExtentBuffer eb01_03 = new ExtentBuffer(1L, b01_03);

    m00_04.replaceExtents(eb01_03);
    assertEquals("resulting map should have 3 extents", m00_04.size(), 3);
    assertEquals(
        "the extent starting at offset 1 in the result "
            + " should be the one given as the replacement",
        m00_04.get(1L),
        eb01_03);
    //
    // XXX: Verify tail's contents as well as its bounds?
    //
    Extent tail = m00_04.get(m00_04.lastKey());
    assertTrue(
        "resulting map should have an extent for protrusion",
        tail.getStartOffset() == 3L && tail.getEndOffset() == 4L);
  }
Ejemplo n.º 2
0
  //
  // Verify that, after replacing the highest-offset extent in a two entry
  // map with one that fits entirely within the replacee's interior:
  //  -   The resulting map has the correct number of extents.
  //  -   The replacement extent appears within the resulting map.
  //
  // XXX: There are more things that can and should be checked here.
  //
  @Test
  public final void testReplaceExtentsLR0() {
    ByteBuffer b00_01 = ByteBuffer.wrap("0".getBytes());
    ByteBuffer b01_09 = ByteBuffer.wrap("12345678".getBytes());
    ExtentBuffer eb00_01 = new ExtentBuffer(0L, b00_01);
    ExtentBuffer eb01_09 = new ExtentBuffer(1L, b01_09);
    ExtentBufferMap m00_09 = new ExtentBufferMap();
    m00_09.put(eb00_01);
    m00_09.put(eb01_09);

    ByteBuffer b05_08 = ByteBuffer.wrap("XYZ".getBytes());
    ExtentBuffer eb05_08 = new ExtentBuffer(5L, b05_08);

    m00_09.replaceExtents(eb05_08);
    assertEquals("resulting map should have 4 extents", m00_09.size(), 4);
    assertEquals(
        "the extent starting at offset 5 in the result "
            + " should be the one given as the replacement",
        m00_09.get(5L),
        eb05_08);
  }
Ejemplo n.º 3
0
  //
  // Verify that intersect() properly handles maps containing extent
  // buffers whose positions and limits are not necessarily equal to (resp.)
  // 0 and their capacities.
  //
  // This test recreates the circumstances of a bug observed while testing
  // the ExtentBufferStreamer class.
  //
  @Test
  public void testIntersectChopped() {
    ByteBuffer b03_06 = ByteBuffer.wrap("def".getBytes());
    ByteBuffer b09_12 = ByteBuffer.wrap("jkl".getBytes());
    ByteBuffer b15_18 = ByteBuffer.wrap("pqr".getBytes());
    ExtentBuffer eb03_06 = new ExtentBuffer(3L, b03_06);
    ExtentBuffer eb09_12 = new ExtentBuffer(9L, b09_12);
    ExtentBuffer eb15_18 = new ExtentBuffer(15L, b15_18);
    ExtentBufferMap fullMap = new ExtentBufferMap();
    fullMap.put(eb03_06);
    fullMap.put(eb09_12);
    fullMap.put(eb15_18);

    //
    // Shorten the middle buffer in the map.
    //
    eb09_12.position(1).limit(2);

    //
    // Intersect fullMap against an extent that will chop up the first
    // contained extent buffer and leave the second two intact.
    //
    ExtentBufferMap choppedMap = fullMap.intersect(new ExtentImpl(4L, 30L));

    ExtentBuffer eb = choppedMap.get(9L);
    assertNotNull("chopped map should still contain the middle extent", eb);
    assertEquals("middle extent should have position 1", eb.position(), 1);
    assertEquals("middle extent should have limit 2", eb.limit(), 2);
  }
Ejemplo n.º 4
0
  //
  // Verify that serialization followed by deserialization works properly
  // for a simple (but not completely trivial) map.
  //
  @Test
  public final void testSerialization0() throws IOException, ClassNotFoundException {
    ByteBuffer b00_01 = ByteBuffer.wrap("0".getBytes());
    ByteBuffer b02_04 = ByteBuffer.wrap("23".getBytes());
    ExtentBuffer eb00_01 = new ExtentBuffer(0L, b00_01);
    ExtentBuffer eb02_04 = new ExtentBuffer(2L, b02_04);
    ExtentBufferMap m00_04 = new ExtentBufferMap();
    m00_04.put(eb00_01);
    m00_04.put(eb02_04);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream out = new ObjectOutputStream(baos);
    out.writeObject(m00_04);
    out.flush();
    baos.flush();

    byte[] serialized = baos.toByteArray();
    ByteArrayInputStream bais = new ByteArrayInputStream(serialized);
    ObjectInputStream in = new ObjectInputStream(bais);
    ExtentBufferMap n00_04 = (ExtentBufferMap) in.readObject();

    out.close();
    baos.close();
    in.close();
    bais.close();

    //
    // Some spot checks:  verify that:
    //  -   the map contains an extent buffer containing offset 3
    //  -   the byte at that position has value '3'
    //
    ExtentBuffer fb02_04 = n00_04.getExtent(3L);
    assertNotNull("expect an extent including offset 3", fb02_04);
    int pos = fb02_04.offsetToPosition(3);
    assertEquals("expect correct contents at offset 3", fb02_04.get(pos), (byte) '3');
  }