public void closeLiveQuery(final InternalFactHandle factHandle) {
try {
startOperation();
this.ruleBase.readLock();
this.lock.lock();
final PropagationContext pCtx =
new PropagationContextImpl(
getNextPropagationIdCounter(),
PropagationContext.INSERTION,
null,
null,
factHandle,
getEntryPoint());
if (this.ruleBase.getConfiguration().isPhreakEnabled()) {
LeftInputAdapterNode lian =
(LeftInputAdapterNode)
factHandle.getFirstLeftTuple().getLeftTupleSink().getLeftTupleSource();
LiaNodeMemory lmem = (LiaNodeMemory) getNodeMemory((MemoryFactory) lian);
SegmentMemory lsmem = lmem.getSegmentMemory();
LeftTuple childLeftTuple =
factHandle.getFirstLeftTuple(); // there is only one, all other LTs are peers
LeftInputAdapterNode.doDeleteObject(
childLeftTuple, childLeftTuple.getPropagationContext(), lsmem, this, lian, false, lmem);
List<PathMemory> rmems = lmem.getSegmentMemory().getPathMemories();
for (int i = 0, length = rmems.size(); i < length; i++) {
PathMemory rm = rmems.get(i);
RuleNetworkEvaluatorActivation evaluator =
agenda.createRuleNetworkEvaluatorActivation(
Integer.MAX_VALUE, rm, (TerminalNode) rm.getNetworkNode());
evaluator.evaluateNetwork(this, 0, -1);
}
} else {
getEntryPointNode().retractQuery(factHandle, pCtx, this);
pCtx.evaluateActionQueue(this);
}
getFactHandleFactory().destroyFactHandle(factHandle);
} finally {
this.lock.unlock();
this.ruleBase.readUnlock();
endOperation();
}
}
public void execute(InternalWorkingMemory workingMemory) {
DroolsQuery query = (DroolsQuery) factHandle.getObject();
RightTupleList rightTuples = query.getResultInsertRightTupleList();
query.setResultInsertRightTupleList(
null); // null so further operations happen on a new stack element
for (RightTuple rightTuple = rightTuples.getFirst(); rightTuple != null; ) {
RightTuple tmp = (RightTuple) rightTuple.getNext();
rightTuples.remove(rightTuple);
for (LeftTuple childLeftTuple = rightTuple.firstChild;
childLeftTuple != null;
childLeftTuple = (LeftTuple) childLeftTuple.getRightParentNext()) {
node.getSinkPropagator()
.doPropagateAssertLeftTuple(
context, workingMemory, childLeftTuple, childLeftTuple.getLeftTupleSink());
}
rightTuple = tmp;
}
// @FIXME, this should work, but it's closing needed fact handles
// actually an evaluation 34 appears on the stack twice....
// if ( !node.isOpenQuery() ) {
// workingMemory.getFactHandleFactory().destroyFactHandle( this.factHandle );
// }
}
public void execute(InternalWorkingMemory workingMemory) {
InternalFactHandle factHandle = (InternalFactHandle) leftTuple.getObject();
if (node.isOpenQuery()) {
// iterate to the query terminal node, as the child leftTuples will get picked up there
workingMemory
.getEntryPointNode()
.retractObject(
factHandle,
context,
workingMemory
.getObjectTypeConfigurationRegistry()
.getObjectTypeConf(workingMemory.getEntryPoint(), factHandle.getObject()),
workingMemory);
// workingMemory.getFactHandleFactory().destroyFactHandle( factHandle );
} else {
// get child left tuples, as there is no open query
if (leftTuple.getFirstChild() != null) {
node.getSinkPropagator().propagateRetractLeftTuple(leftTuple, context, workingMemory);
}
}
}
public void execute(InternalWorkingMemory workingMemory) {
DroolsQuery query = (DroolsQuery) factHandle.getObject();
RightTupleList rightTuples = query.getResultRetractRightTupleList();
query.setResultRetractRightTupleList(
null); // null so further operations happen on a new stack element
for (RightTuple rightTuple = rightTuples.getFirst(); rightTuple != null; ) {
RightTuple tmp = (RightTuple) rightTuple.getNext();
rightTuples.remove(rightTuple);
this.node
.getSinkPropagator()
.propagateRetractRightTuple(rightTuple, context, workingMemory);
rightTuple = tmp;
}
}
public EqualityKey(final InternalFactHandle handle, final int status) {
super((DefaultFactHandle) handle);
this.hashCode = handle.getObjectHashCode();
this.status = status;
}
/** Side-effects, will add the created key to the handle. */
private EqualityKey createEqualityKey(InternalFactHandle handle) {
EqualityKey key = new EqualityKey(handle);
handle.setEqualityKey(key);
return key;
}
protected void addPropertyChangeListener(
final InternalFactHandle handle, final boolean dynamicFlag) {
Object object = handle.getObject();
try {
final Method method =
object
.getClass()
.getMethod(
"addPropertyChangeListener",
NamedEntryPoint.ADD_REMOVE_PROPERTY_CHANGE_LISTENER_ARG_TYPES);
method.invoke(object, this.addRemovePropertyChangeListenerArgs);
if (dynamicFlag) {
if (dynamicFacts == null) {
dynamicFacts = new HashSet<InternalFactHandle>();
}
dynamicFacts.add(handle);
}
} catch (final NoSuchMethodException e) {
System.err.println(
"Warning: Method addPropertyChangeListener not found"
+ " on the class "
+ object.getClass()
+ " so Drools will be unable to process JavaBean"
+ " PropertyChangeEvents on the asserted Object");
} catch (final IllegalArgumentException e) {
System.err.println(
"Warning: The addPropertyChangeListener method"
+ " on the class "
+ object.getClass()
+ " does not take"
+ " a simple PropertyChangeListener argument"
+ " so Drools will be unable to process JavaBean"
+ " PropertyChangeEvents on the asserted Object");
} catch (final IllegalAccessException e) {
System.err.println(
"Warning: The addPropertyChangeListener method"
+ " on the class "
+ object.getClass()
+ " is not public"
+ " so Drools will be unable to process JavaBean"
+ " PropertyChangeEvents on the asserted Object");
} catch (final InvocationTargetException e) {
System.err.println(
"Warning: The addPropertyChangeListener method"
+ " on the class "
+ object.getClass()
+ " threw an InvocationTargetException"
+ " so Drools will be unable to process JavaBean"
+ " PropertyChangeEvents on the asserted Object: "
+ e.getMessage());
} catch (final SecurityException e) {
System.err.println(
"Warning: The SecurityManager controlling the class "
+ object.getClass()
+ " did not allow the lookup of a"
+ " addPropertyChangeListener method"
+ " so Drools will be unable to process JavaBean"
+ " PropertyChangeEvents on the asserted Object: "
+ e.getMessage());
}
}
public void retract(
final org.drools.FactHandle factHandle,
final boolean removeLogical,
final boolean updateEqualsMap,
final Rule rule,
final Activation activation)
throws FactException {
if (factHandle == null) {
throw new IllegalArgumentException("FactHandle cannot be null ");
}
try {
this.ruleBase.readLock();
this.lock.lock();
this.wm.startOperation();
this.ruleBase.executeQueuedActions();
InternalFactHandle handle = (InternalFactHandle) factHandle;
if (handle.getId() == -1) {
// can't retract an already retracted handle
return;
}
// the handle might have been disconnected, so reconnect if it has
if (handle.isDisconnected()) {
handle = this.objectStore.reconnect(handle);
}
if (handle.getEntryPoint() != this) {
throw new IllegalArgumentException(
"Invalid Entry Point. You updated the FactHandle on entry point '"
+ handle.getEntryPoint().getEntryPointId()
+ "' instead of '"
+ getEntryPointId()
+ "'");
}
final Object object = handle.getObject();
final ObjectTypeConf typeConf = this.typeConfReg.getObjectTypeConf(this.entryPoint, object);
if (typeConf.isSupportsPropertyChangeListeners()) {
removePropertyChangeListener(handle, true);
}
if (activation != null) {
// release resources so that they can be GC'ed
activation.getPropagationContext().releaseResources();
}
final PropagationContext propagationContext =
new PropagationContextImpl(
this.wm.getNextPropagationIdCounter(),
PropagationContext.RETRACTION,
rule,
(activation == null) ? null : activation.getTuple(),
handle,
this.wm.agenda.getActiveActivations(),
this.wm.agenda.getDormantActivations(),
this.entryPoint);
this.entryPointNode.retractObject(handle, propagationContext, typeConf, this.wm);
if (typeConf.isTMSEnabled()) {
TruthMaintenanceSystem tms = wm.getTruthMaintenanceSystem();
// Update the equality key, which maintains a list of stated
// FactHandles
final EqualityKey key = handle.getEqualityKey();
// Its justified so attempt to remove any logical dependencies
// for
// the handle
if (key.getStatus() == EqualityKey.JUSTIFIED) {
tms.removeLogicalDependencies(handle);
}
key.removeFactHandle(handle);
handle.setEqualityKey(null);
// If the equality key is now empty, then remove it
if (key.isEmpty()) {
tms.remove(key);
}
}
propagationContext.evaluateActionQueue(this.wm);
this.wm.workingMemoryEventSupport.fireObjectRetracted(
propagationContext, handle, object, this.wm);
this.objectStore.removeHandle(handle);
this.handleFactory.destroyFactHandle(handle);
this.wm.executeQueuedActions();
if (rule == null) {
// This is not needed for internal WM actions as the firing rule will unstage
this.wm.getAgenda().unstageActivations();
}
} finally {
this.wm.endOperation();
this.lock.unlock();
this.ruleBase.readUnlock();
}
}
public void update(
org.drools.FactHandle factHandle,
final Object object,
final long mask,
final Activation activation)
throws FactException {
try {
this.ruleBase.readLock();
this.lock.lock();
this.wm.startOperation();
this.ruleBase.executeQueuedActions();
InternalFactHandle handle = (InternalFactHandle) factHandle;
// the handle might have been disconnected, so reconnect if it has
if (handle.isDisconnected()) {
handle = this.objectStore.reconnect(factHandle);
}
final Object originalObject = handle.getObject();
if (handle.getEntryPoint() != this) {
throw new IllegalArgumentException(
"Invalid Entry Point. You updated the FactHandle on entry point '"
+ handle.getEntryPoint().getEntryPointId()
+ "' instead of '"
+ getEntryPointId()
+ "'");
}
final ObjectTypeConf typeConf = this.typeConfReg.getObjectTypeConf(this.entryPoint, object);
// only needed if we maintain tms, but either way we must get it before we do the retract
int status = -1;
if (typeConf.isTMSEnabled()) {
status = handle.getEqualityKey().getStatus();
}
if (handle.getId() == -1
|| object == null
|| (handle.isEvent() && ((EventFactHandle) handle).isExpired())) {
// the handle is invalid, most likely already retracted, so return and we cannot assert a
// null object
return;
}
if (activation != null) {
// release resources so that they can be GC'ed
activation.getPropagationContext().releaseResources();
}
if (originalObject != object
|| !AssertBehaviour.IDENTITY.equals(
this.ruleBase.getConfiguration().getAssertBehaviour())) {
this.objectStore.removeHandle(handle);
// set anyway, so that it updates the hashCodes
handle.setObject(object);
this.objectStore.addHandle(handle, object);
}
if (typeConf.isTMSEnabled()) {
// the hashCode and equality has changed, so we must update the
// EqualityKey
EqualityKey key = handle.getEqualityKey();
key.removeFactHandle(handle);
TruthMaintenanceSystem tms = wm.getTruthMaintenanceSystem();
// If the equality key is now empty, then remove it
if (key.isEmpty()) {
tms.remove(key);
}
// now use an existing EqualityKey, if it exists, else create a new one
key = tms.get(object);
if (key == null) {
key = new EqualityKey(handle, status);
tms.put(key);
} else {
key.addFactHandle(handle);
}
handle.setEqualityKey(key);
}
this.handleFactory.increaseFactHandleRecency(handle);
Rule rule = activation == null ? null : activation.getRule();
final PropagationContext propagationContext =
new PropagationContextImpl(
this.wm.getNextPropagationIdCounter(),
PropagationContext.MODIFICATION,
rule,
(activation == null) ? null : activation.getTuple(),
handle,
this.wm.agenda.getActiveActivations(),
this.wm.agenda.getDormantActivations(),
entryPoint,
mask);
this.entryPointNode.modifyObject(handle, propagationContext, typeConf, this.wm);
propagationContext.evaluateActionQueue(this.wm);
this.wm.workingMemoryEventSupport.fireObjectUpdated(
propagationContext, factHandle, originalObject, object, this.wm);
this.wm.executeQueuedActions();
if (rule == null) {
// This is not needed for internal WM actions as the firing rule will unstage
this.wm.getAgenda().unstageActivations();
}
} finally {
this.wm.endOperation();
this.lock.unlock();
this.ruleBase.readUnlock();
}
}
protected FactHandle insert(
final Object object,
final boolean dynamic,
boolean logical,
final Rule rule,
final Activation activation)
throws FactException {
if (object == null) {
// you cannot assert a null object
return null;
}
try {
this.wm.startOperation();
ObjectTypeConf typeConf = this.typeConfReg.getObjectTypeConf(this.entryPoint, object);
if (logical && !typeConf.isTMSEnabled()) {
enableTMS(object, typeConf);
}
InternalFactHandle handle = null;
if (this.wm.isSequential()) {
handle = createHandle(object, typeConf);
insert(handle, object, rule, activation, typeConf);
return handle;
}
try {
this.ruleBase.readLock();
this.lock.lock();
// check if the object already exists in the WM
handle = this.objectStore.getHandleForObject(object);
if (typeConf.isTMSEnabled()) {
EqualityKey key;
TruthMaintenanceSystem tms = wm.getTruthMaintenanceSystem();
if (handle == null) {
// lets see if the object is already logical asserted
key = tms.get(object);
} else {
// Object is already asserted, so check and possibly correct its
// status and then return the handle
key = handle.getEqualityKey();
if (key.getStatus() == EqualityKey.STATED) {
// return null as you cannot justify a stated object.
return handle;
}
if (!logical) {
// this object was previously justified, so we have to override it to stated
key.setStatus(EqualityKey.STATED);
tms.removeLogicalDependencies(handle);
} else {
// this was object is already justified, so just add new logical dependency
tms.addLogicalDependency(
handle, activation, activation.getPropagationContext(), rule);
}
return handle;
}
// At this point we know the handle is null
if (key == null) {
handle = createHandle(object, typeConf);
key = createEqualityKey(handle);
tms.put(key);
if (!logical) {
key.setStatus(EqualityKey.STATED);
} else {
key.setStatus(EqualityKey.JUSTIFIED);
tms.addLogicalDependency(
handle, activation, activation.getPropagationContext(), rule);
}
} else if (!logical) {
if (key.getStatus() == EqualityKey.JUSTIFIED) {
// Its previous justified, so switch to stated and remove logical dependencies
final InternalFactHandle justifiedHandle = key.getFactHandle();
tms.removeLogicalDependencies(justifiedHandle);
if (this.wm.discardOnLogicalOverride) {
// override, setting to new instance, and return
// existing handle
key.setStatus(EqualityKey.STATED);
handle = key.getFactHandle();
if (AssertBehaviour.IDENTITY.equals(
this.ruleBase.getConfiguration().getAssertBehaviour())) {
// as assertMap may be using an "identity"
// equality comparator,
// we need to remove the handle from the map,
// before replacing the object
// and then re-add the handle. Otherwise we may
// end up with a leak.
this.objectStore.updateHandle(handle, object);
}
return handle;
} else {
// override, then instantiate new handle for
// assertion
key.setStatus(EqualityKey.STATED);
handle = createHandle(object, typeConf);
handle.setEqualityKey(key);
key.addFactHandle(handle);
}
} else {
handle = createHandle(object, typeConf);
key.addFactHandle(handle);
handle.setEqualityKey(key);
}
} else {
if (key.getStatus() == EqualityKey.JUSTIFIED) {
// only add as logical dependency if this wasn't previously stated
tms.addLogicalDependency(
key.getFactHandle(), activation, activation.getPropagationContext(), rule);
return key.getFactHandle();
} else {
// You cannot justify a previously stated equality equal object, so return null
return null;
}
}
} else {
if (handle != null) {
return handle;
}
handle = createHandle(object, typeConf);
}
// if the dynamic parameter is true or if the user declared the fact type with the meta tag:
// @propertyChangeSupport
if (dynamic || typeConf.isDynamic()) {
addPropertyChangeListener(handle, dynamic);
}
insert(handle, object, rule, activation, typeConf);
} finally {
this.lock.unlock();
this.ruleBase.readUnlock();
}
return handle;
} finally {
this.wm.endOperation();
}
}
public void destroyFactHandle(final InternalFactHandle factHandle) {
factHandle.invalidate();
}
public final void increaseFactHandleRecency(final InternalFactHandle factHandle) {
factHandle.setRecency(this.counter.incrementAndGet());
}
