Examples with BinaryDequeReader org.voltdb.utils.BinaryDeque.BinaryDequeReader used on opensource projects

Example 21 with BinaryDequeReader

use of org.voltdb.utils.BinaryDeque.BinaryDequeReader in project voltdb by VoltDB.

the class TestPersistentBinaryDeque method testReaderNumObjects.

@Test
public void testReaderNumObjects() throws Exception {
    System.out.println("Running testReaderNumObjects");
    String cursor1 = "testPBD1";
    BinaryDequeReader reader1 = m_pbd.openForRead(cursor1);
    int count = 0;
    int totalAdded = 0;
    assertEquals(count, reader1.getNumObjects());
    assertNull(reader1.poll(PersistentBinaryDeque.UNSAFE_CONTAINER_FACTORY));
    assertEquals(count, reader1.getNumObjects());
    count++;
    m_pbd.offer(defaultContainer());
    totalAdded++;
    assertEquals(count, reader1.getNumObjects());
    // a second reader
    String cursor2 = "testPBD2";
    BinaryDequeReader reader2 = m_pbd.openForRead(cursor2);
    pollDiscard(reader1);
    assertEquals(count - 1, reader1.getNumObjects());
    assertEquals(count, reader2.getNumObjects());
    pollDiscard(reader2);
    count--;
    assertEquals(count, reader1.getNumObjects());
    assertEquals(count, reader2.getNumObjects());
    // offer segments
    for (int i = 0; i < 50; i++) {
        m_pbd.offer(defaultContainer());
        totalAdded++;
        count++;
        assertEquals(count, reader1.getNumObjects());
        assertEquals(count, reader2.getNumObjects());
    }
    for (int i = 0; i < 50; i++) {
        pollDiscard(reader1);
        assertEquals(count - 1, reader1.getNumObjects());
        assertEquals(count, reader2.getNumObjects());
        pollDiscard(reader2);
        count--;
        assertEquals(count, reader1.getNumObjects());
        assertEquals(count, reader2.getNumObjects());
    }
    final int segmentfullCount = 47;
    // start a 3rd reader after segments have been deleted
    String cursor3 = "testPBD3";
    BinaryDequeReader lateReader = m_pbd.openForRead(cursor3);
    int toAddForLate = totalAdded % segmentfullCount;
    assertEquals(count + toAddForLate, lateReader.getNumObjects());
    // offer segments with all 3 readers
    for (int i = 0; i < 50; i++) {
        m_pbd.offer(defaultContainer());
        count++;
        assertEquals(count, reader1.getNumObjects());
        assertEquals(count, reader2.getNumObjects());
        assertEquals(count + toAddForLate, lateReader.getNumObjects());
    }
    for (int i = 0; i < 50; i++) {
        pollDiscard(reader1);
        assertEquals(count - 1, reader1.getNumObjects());
        assertEquals(count, reader2.getNumObjects());
        assertEquals(count + toAddForLate, lateReader.getNumObjects());
        pollDiscard(reader2);
        assertEquals(count - 1, reader1.getNumObjects());
        assertEquals(count - 1, reader2.getNumObjects());
        assertEquals(count + toAddForLate, lateReader.getNumObjects());
        pollDiscard(lateReader);
        count--;
        assertEquals(count, reader1.getNumObjects());
        assertEquals(count, reader2.getNumObjects());
        assertEquals(count + toAddForLate, lateReader.getNumObjects());
    }
    assert (count == 0);
    for (int i = 0; i < toAddForLate; i++) {
        pollDiscard(lateReader);
        assertEquals(toAddForLate - i - 1, lateReader.getNumObjects());
    }
    assertEquals(0, reader1.getNumObjects());
    assertEquals(0, reader2.getNumObjects());
    assertEquals(0, lateReader.getNumObjects());
}

Example 22 with BinaryDequeReader

use of org.voltdb.utils.BinaryDeque.BinaryDequeReader in project voltdb by VoltDB.

the class TestPersistentBinaryDeque method testNonceWithDots.

@Test
public void testNonceWithDots() throws Exception {
    System.out.println("Running testNonceWithDots");
    PersistentBinaryDeque pbd = new PersistentBinaryDeque("ha.ha", TEST_DIR, logger);
    pbd.offer(defaultContainer());
    pbd.close();
    pbd = new PersistentBinaryDeque("ha.ha", TEST_DIR, logger);
    BinaryDequeReader reader = pbd.openForRead(CURSOR_ID);
    BBContainer bb = reader.poll(PersistentBinaryDeque.UNSAFE_CONTAINER_FACTORY);
    try {
        ByteBuffer defaultBuffer = defaultBuffer();
        defaultBuffer.clear();
        assertEquals(defaultBuffer, bb.b());
        pbd.close();
    } finally {
        bb.discard();
    }
}