@After
public void shutdownMemoryManager() throws Exception {
if (this.memorySize > 0) {
MemoryManager memMan = getMemoryManager();
if (memMan != null) {
Assert.assertTrue(
"Memory Manager managed memory was not completely freed.", memMan.verifyEmpty());
memMan.shutdown();
}
}
}
@Override
public PactRecord peek() {
if (readNext) {
int bytesRead =
currentReadRecord.deserialize(segments, CURRENT_READ_SEGMENT_INDEX, currentReadOffset);
while (bytesRead > 0) {
if (currentReadSegment.size() - currentReadOffset > bytesRead) {
currentReadOffset += bytesRead;
bytesRead = 0;
} else {
bytesRead -= (currentReadSegment.size() - currentReadOffset);
// Remove old read segment from list & release in memory manager
MemorySegment unused = segments.remove(CURRENT_READ_SEGMENT_INDEX);
memoryManager.release(unused);
// Update reference to new read segment
currentReadSegment = segments.get(CURRENT_READ_SEGMENT_INDEX);
currentReadOffset = 0;
}
}
readNext = false;
}
return currentReadRecord;
}
@Override
public int size() {
if (count == 0) {
// A memory segment can be left if it was not completely full
if (segments.size() == 1) {
currentWriteSegment = null;
memoryManager.release(segments);
} else if (segments.size() > 1) {
throw new RuntimeException("Too many memory segments left");
}
}
return count;
}
public SpillingResettableIterator(
Iterator<T> input,
TypeSerializer<T> serializer,
MemoryManager memoryManager,
IOManager ioManager,
long availableMemory,
AbstractInvokable parentTask)
throws MemoryAllocationException {
this(
input,
serializer,
memoryManager,
ioManager,
memoryManager.allocatePages(parentTask, availableMemory),
true);
}
private SpillingResettableIterator(
Iterator<T> input,
TypeSerializer<T> serializer,
MemoryManager memoryManager,
IOManager ioManager,
List<MemorySegment> memory,
boolean releaseMemOnClose) {
this.memoryManager = memoryManager;
this.input = input;
this.instance = serializer.createInstance();
this.serializer = serializer;
this.memorySegments = memory;
this.releaseMemoryOnClose = releaseMemOnClose;
if (LOG.isDebugEnabled())
LOG.debug(
"Creating spilling resettable iterator with " + memory.size() + " pages of memory.");
this.buffer =
new SpillingBuffer(
ioManager, new ListMemorySegmentSource(memory), memoryManager.getPageSize());
}
/**
* Unregisters the task from the central memory manager.
*
* @param memoryManager the central memory manager
*/
public void unregisterMemoryManager(final MemoryManager memoryManager) {
if (memoryManager != null) {
memoryManager.releaseAll(this.environment.getInvokable());
}
}
@Override
public void clear() {
memoryManager.release(segments);
segments.clear();
count = 0;
}
