public static void findLeftTupleBlocker(
BetaNode betaNode,
TupleMemory rtm,
ContextEntry[] contextEntry,
BetaConstraints constraints,
LeftTuple leftTuple,
FastIterator it,
boolean useLeftMemory) {
// This method will also remove rightTuples that are from subnetwork where no leftmemory use
// used
for (RightTuple rightTuple = betaNode.getFirstRightTuple(leftTuple, rtm, null, it);
rightTuple != null; ) {
RightTuple nextRight = (RightTuple) it.next(rightTuple);
if (constraints.isAllowedCachedLeft(contextEntry, rightTuple.getFactHandle())) {
leftTuple.setBlocker(rightTuple);
if (useLeftMemory) {
rightTuple.addBlocked(leftTuple);
break;
} else if (betaNode.isRightInputIsRiaNode()) {
// If we aren't using leftMemory and the right input is a RIAN, then we must iterate and
// find all subetwork right tuples and remove them
// so we don't break
rtm.remove(rightTuple);
} else {
break;
}
}
rightTuple = nextRight;
}
}
public void doRightDeletes(
NotNode notNode,
LeftTupleSink sink,
BetaMemory bm,
InternalWorkingMemory wm,
RightTupleSets srcRightTuples,
LeftTupleSets trgLeftTuples) {
LeftTupleMemory ltm = bm.getLeftTupleMemory();
RightTupleMemory rtm = bm.getRightTupleMemory();
ContextEntry[] contextEntry = bm.getContext();
BetaConstraints constraints = notNode.getRawConstraints();
for (RightTuple rightTuple = srcRightTuples.getDeleteFirst(); rightTuple != null; ) {
RightTuple next = rightTuple.getStagedNext();
FastIterator it = notNode.getRightIterator(rtm);
// assign now, so we can remove from memory before doing any possible propagations
boolean useComparisonIndex = rtm.getIndexType().isComparison();
RightTuple rootBlocker = useComparisonIndex ? null : (RightTuple) it.next(rightTuple);
if (rightTuple.getMemory() != null) {
// it may have been staged and never actually added
rtm.remove(rightTuple);
}
if (rightTuple.getBlocked() != null) {
for (LeftTuple leftTuple = rightTuple.getBlocked(); leftTuple != null; ) {
LeftTuple temp = leftTuple.getBlockedNext();
leftTuple.clearBlocker();
if (leftTuple.getStagedType() == LeftTuple.UPDATE) {
// ignore, as it will get processed via left iteration. Children cannot be processed
// twice
leftTuple = temp;
continue;
}
constraints.updateFromTuple(contextEntry, wm, leftTuple);
if (useComparisonIndex) {
rootBlocker = rtm.getFirst(leftTuple, null, it);
}
// we know that older tuples have been checked so continue next
for (RightTuple newBlocker = rootBlocker;
newBlocker != null;
newBlocker = (RightTuple) it.next(newBlocker)) {
if (constraints.isAllowedCachedLeft(contextEntry, newBlocker.getFactHandle())) {
leftTuple.setBlocker(newBlocker);
newBlocker.addBlocked(leftTuple);
break;
}
}
if (leftTuple.getBlocker() == null) {
// was previous blocked and not in memory, so add
ltm.add(leftTuple);
trgLeftTuples.addInsert(
sink.createLeftTuple(leftTuple, sink, rightTuple.getPropagationContext(), true));
}
leftTuple = temp;
}
}
rightTuple.nullBlocked();
rightTuple.clearStaged();
rightTuple = next;
}
constraints.resetTuple(contextEntry);
}
public void doRightUpdates(
NotNode notNode,
LeftTupleSink sink,
BetaMemory bm,
InternalWorkingMemory wm,
RightTupleSets srcRightTuples,
LeftTupleSets trgLeftTuples,
LeftTupleSets stagedLeftTuples) {
LeftTupleMemory ltm = bm.getLeftTupleMemory();
RightTupleMemory rtm = bm.getRightTupleMemory();
ContextEntry[] contextEntry = bm.getContext();
BetaConstraints constraints = notNode.getRawConstraints();
boolean iterateFromStart =
notNode.isIndexedUnificationJoin() || rtm.getIndexType().isComparison();
for (RightTuple rightTuple = srcRightTuples.getUpdateFirst(); rightTuple != null; ) {
RightTuple next = rightTuple.getStagedNext();
PropagationContext context = rightTuple.getPropagationContext();
constraints.updateFromFactHandle(contextEntry, wm, rightTuple.getFactHandle());
FastIterator leftIt = notNode.getLeftIterator(ltm);
LeftTuple firstLeftTuple = notNode.getFirstLeftTuple(rightTuple, ltm, context, leftIt);
LeftTuple firstBlocked = rightTuple.getTempBlocked();
// first process non-blocked tuples, as we know only those ones are in the left memory.
for (LeftTuple leftTuple = firstLeftTuple; leftTuple != null; ) {
// preserve next now, in case we remove this leftTuple
LeftTuple temp = (LeftTuple) leftIt.next(leftTuple);
if (leftTuple.getStagedType() == LeftTuple.UPDATE) {
// ignore, as it will get processed via left iteration. Children cannot be processed twice
leftTuple = temp;
continue;
}
// we know that only unblocked LeftTuples are still in the memory
if (constraints.isAllowedCachedRight(contextEntry, leftTuple)) {
leftTuple.setBlocker(rightTuple);
rightTuple.addBlocked(leftTuple);
// this is now blocked so remove from memory
ltm.remove(leftTuple);
LeftTuple childLeftTuple = leftTuple.getFirstChild();
if (childLeftTuple != null) {
childLeftTuple.setPropagationContext(rightTuple.getPropagationContext());
RuleNetworkEvaluator.deleteRightChild(childLeftTuple, trgLeftTuples, stagedLeftTuples);
}
}
leftTuple = temp;
}
if (firstBlocked != null) {
RightTuple rootBlocker = rightTuple.getTempNextRightTuple();
if (rootBlocker == null) {
iterateFromStart = true;
}
FastIterator rightIt = notNode.getRightIterator(rtm);
// iterate all the existing previous blocked LeftTuples
for (LeftTuple leftTuple = firstBlocked; leftTuple != null; ) {
LeftTuple temp = leftTuple.getBlockedNext();
leftTuple.clearBlocker();
if (leftTuple.getStagedType() == LeftTuple.UPDATE) {
// ignore, as it will get processed via left iteration. Children cannot be processed
// twice
// but need to add it back into list first
leftTuple.setBlocker(rightTuple);
rightTuple.addBlocked(leftTuple);
leftTuple = temp;
continue;
}
constraints.updateFromTuple(contextEntry, wm, leftTuple);
if (iterateFromStart) {
rootBlocker = notNode.getFirstRightTuple(leftTuple, rtm, null, rightIt);
}
// we know that older tuples have been checked so continue next
for (RightTuple newBlocker = rootBlocker;
newBlocker != null;
newBlocker = (RightTuple) rightIt.next(newBlocker)) {
// cannot select a RightTuple queued in the delete list
// There may be UPDATE RightTuples too, but that's ok. They've already been re-added to
// the correct bucket, safe to be reprocessed.
if (leftTuple.getStagedType() != LeftTuple.DELETE
&& newBlocker.getStagedType() != LeftTuple.DELETE
&& constraints.isAllowedCachedLeft(contextEntry, newBlocker.getFactHandle())) {
leftTuple.setBlocker(newBlocker);
newBlocker.addBlocked(leftTuple);
break;
}
}
if (leftTuple.getBlocker() == null) {
// was previous blocked and not in memory, so add
ltm.add(leftTuple);
// subclasses like ForallNotNode might override this propagation
trgLeftTuples.addInsert(
sink.createLeftTuple(leftTuple, sink, rightTuple.getPropagationContext(), true));
}
leftTuple = temp;
}
}
rightTuple.clearStaged();
rightTuple = next;
}
constraints.resetFactHandle(contextEntry);
constraints.resetTuple(contextEntry);
}
public void doLeftUpdates(
NotNode notNode,
LeftTupleSink sink,
BetaMemory bm,
InternalWorkingMemory wm,
LeftTupleSets srcLeftTuples,
LeftTupleSets trgLeftTuples,
LeftTupleSets stagedLeftTuples) {
LeftTupleMemory ltm = bm.getLeftTupleMemory();
RightTupleMemory rtm = bm.getRightTupleMemory();
ContextEntry[] contextEntry = bm.getContext();
BetaConstraints constraints = notNode.getRawConstraints();
boolean leftUpdateOptimizationAllowed = notNode.isLeftUpdateOptimizationAllowed();
for (LeftTuple leftTuple = srcLeftTuples.getUpdateFirst(); leftTuple != null; ) {
LeftTuple next = leftTuple.getStagedNext();
FastIterator rightIt = notNode.getRightIterator(rtm);
RightTuple firstRightTuple = notNode.getFirstRightTuple(leftTuple, rtm, null, rightIt);
// If in memory, remove it, because we'll need to add it anyway if it's not blocked, to ensure
// iteration order
RightTuple blocker = leftTuple.getBlocker();
if (blocker == null) {
if (leftTuple.getMemory()
!= null) { // memory can be null, if blocker was deleted in same do loop
ltm.remove(leftTuple);
}
} else {
// check if we changed bucket
if (rtm.isIndexed() && !rightIt.isFullIterator()) {
// if newRightTuple is null, we assume there was a bucket change and that bucket is empty
if (firstRightTuple == null || firstRightTuple.getMemory() != blocker.getMemory()) {
blocker.removeBlocked(leftTuple);
blocker = null;
}
}
}
constraints.updateFromTuple(contextEntry, wm, leftTuple);
if (!leftUpdateOptimizationAllowed && blocker != null) {
blocker.removeBlocked(leftTuple);
blocker = null;
}
// if we where not blocked before (or changed buckets), or the previous blocker no longer
// blocks, then find the next blocker
if (blocker == null
|| !constraints.isAllowedCachedLeft(contextEntry, blocker.getFactHandle())) {
if (blocker != null) {
// remove previous blocker if it exists, as we know it doesn't block any more
blocker.removeBlocked(leftTuple);
}
// find first blocker, because it's a modify, we need to start from the beginning again
for (RightTuple newBlocker = firstRightTuple;
newBlocker != null;
newBlocker = (RightTuple) rightIt.next(newBlocker)) {
if (constraints.isAllowedCachedLeft(contextEntry, newBlocker.getFactHandle())) {
leftTuple.setBlocker(newBlocker);
newBlocker.addBlocked(leftTuple);
break;
}
}
LeftTuple childLeftTuple = leftTuple.getFirstChild();
if (leftTuple.getBlocker() != null) {
// blocked
if (childLeftTuple != null) {
// blocked, with previous children, so must have not been previously blocked, so retract
// no need to remove, as we removed at the start
// to be matched against, as it's now blocked
childLeftTuple.setPropagationContext(
leftTuple
.getBlocker()
.getPropagationContext()); // we have the righttuple, so use it for the pctx
RuleNetworkEvaluator.deleteLeftChild(childLeftTuple, trgLeftTuples, stagedLeftTuples);
} // else: it's blocked now and no children so blocked before, thus do nothing
} else if (childLeftTuple == null) {
// not blocked, with no children, must have been previously blocked so assert
ltm.add(leftTuple); // add to memory so other fact handles can attempt to match
trgLeftTuples.addInsert(
sink.createLeftTuple(
leftTuple,
sink,
leftTuple.getPropagationContext(),
true)); // use leftTuple for the pctx here, as the right one is not available
// this won't cause a problem, as the trigger tuple (to the left) will be more recent
// anwyay
} else {
updateChildLeftTuple(childLeftTuple, stagedLeftTuples, trgLeftTuples);
// not blocked, with children, so wasn't previous blocked and still isn't so modify
ltm.add(leftTuple); // add to memory so other fact handles can attempt to match
childLeftTuple.reAddLeft();
}
}
leftTuple.clearStaged();
leftTuple = next;
}
constraints.resetTuple(contextEntry);
}
public void doRightInserts(
NotNode notNode,
BetaMemory bm,
InternalWorkingMemory wm,
RightTupleSets srcRightTuples,
LeftTupleSets trgLeftTuples,
LeftTupleSets stagedLeftTuples) {
LeftTupleMemory ltm = bm.getLeftTupleMemory();
RightTupleMemory rtm = bm.getRightTupleMemory();
ContextEntry[] contextEntry = bm.getContext();
BetaConstraints constraints = notNode.getRawConstraints();
// this must be processed here, rather than initial insert, as we need to link the blocker
unlinkNotNodeOnRightInsert(notNode, bm, wm);
for (RightTuple rightTuple = srcRightTuples.getInsertFirst(); rightTuple != null; ) {
RightTuple next = rightTuple.getStagedNext();
rtm.add(rightTuple);
if (ltm == null || ltm.size() == 0) {
// do nothing here, as no left memory
rightTuple.clearStaged();
rightTuple = next;
continue;
}
FastIterator it = notNode.getLeftIterator(ltm);
PropagationContext context = rightTuple.getPropagationContext();
constraints.updateFromFactHandle(contextEntry, wm, rightTuple.getFactHandle());
for (LeftTuple leftTuple = notNode.getFirstLeftTuple(rightTuple, ltm, context, it);
leftTuple != null; ) {
// preserve next now, in case we remove this leftTuple
LeftTuple temp = (LeftTuple) it.next(leftTuple);
if (leftTuple.getStagedType() == LeftTuple.UPDATE) {
// ignore, as it will get processed via left iteration. Children cannot be processed twice
leftTuple = temp;
continue;
}
// we know that only unblocked LeftTuples are still in the memory
if (constraints.isAllowedCachedRight(contextEntry, leftTuple)) {
leftTuple.setBlocker(rightTuple);
rightTuple.addBlocked(leftTuple);
// this is now blocked so remove from memory
ltm.remove(leftTuple);
// subclasses like ForallNotNode might override this propagation
// ** @TODO (mdp) need to not break forall
LeftTuple childLeftTuple = leftTuple.getFirstChild();
if (childLeftTuple != null) { // NotNode only has one child
childLeftTuple.setPropagationContext(rightTuple.getPropagationContext());
RuleNetworkEvaluator.deleteLeftChild(childLeftTuple, trgLeftTuples, stagedLeftTuples);
}
}
leftTuple = temp;
}
rightTuple.clearStaged();
rightTuple = next;
}
constraints.resetFactHandle(contextEntry);
}