SharedFileDescriptorFactory factory =
SharedFileDescriptorFactory.create("shm_",
new String[] { path.getAbsolutePath() });
FileInputStream stream =
factory.createDescriptor("testAllocateSlots", 4096);
ShortCircuitShm shm = new ShortCircuitShm(ShmId.createRandom(), stream);
int numSlots = 0;
ArrayList<Slot> slots = new ArrayList<Slot>();
while (!shm.isFull()) {
Slot slot = shm.allocAndRegisterSlot(new ExtendedBlockId(123L, "test_bp1"));
slots.add(slot);
numSlots++;
}
LOG.info("allocated " + numSlots + " slots before running out.");
int slotIdx = 0;
for (Iterator<Slot> iter = shm.slotIterator();
iter.hasNext(); ) {
Assert.assertTrue(slots.contains(iter.next()));
}
for (Slot slot : slots) {
Assert.assertFalse(slot.addAnchor());
Assert.assertEquals(slotIdx++, slot.getSlotIdx());
}
for (Slot slot : slots) {
slot.makeAnchorable();
}
for (Slot slot : slots) {
Assert.assertTrue(slot.addAnchor());
}
for (Slot slot : slots) {
slot.removeAnchor();
}
for (Slot slot : slots) {
shm.unregisterSlot(slot.getSlotIdx());
slot.makeInvalid();
}
shm.free();
stream.close();
FileUtil.fullyDelete(path);
}