public void clear() {
// reset focus stack
this.focusStack.clear();
this.focusStack.add(getMainAgendaGroup());
// reset scheduled activations
if (!this.scheduledActivations.isEmpty()) {
for (ScheduledAgendaItem item = this.scheduledActivations.removeFirst();
item != null;
item = this.scheduledActivations.removeFirst()) {
item.setEnqueued(false);
Scheduler.removeAgendaItem(item, this);
}
}
// reset staged activations
getStageActivationsGroup().clear();
// reset all agenda groups
for (InternalAgendaGroup group : this.agendaGroups.values()) {
group.reset();
}
// reset all activation groups.
for (InternalActivationGroup group : this.activationGroups.values()) {
group.setTriggeredForRecency(this.workingMemory.getFactHandleFactory().getRecency());
group.reset();
}
}
/**
* If the item belongs to an activation group, add it
*
* @param item
*/
public void addItemToActivationGroup(final AgendaItem item) {
String group = item.getRule().getActivationGroup();
if (group != null && group.length() > 0) {
InternalActivationGroup actgroup = getActivationGroup(group);
actgroup.addActivation(item);
}
}
public void modifyActivation(final AgendaItem activation, boolean previouslyActive) {
if (declarativeAgenda) {
InternalFactHandle factHandle = activation.getFactHandle();
workingMemory
.getEntryPointNode()
.modifyActivation(factHandle, activation.getPropagationContext(), workingMemory);
if (previouslyActive) {
// already activated
return;
}
if (activation.isCanceled()
|| (activation.getBlockers() != null && activation.getBlockers().size() > 0)) {
// it's blocked so do nothing
return;
}
// All activations started off staged, they are unstaged if they are blocked or
// allowed to move onto the actual agenda for firing.
InternalActivationGroup activationGroup = getStageActivationsGroup();
if (activation.getActivationGroupNode() != null
&& activation.getActivationGroupNode().getActivationGroup() == activationGroup) {
// already staged, so return
return;
}
activationGroup.addActivation(activation);
} else {
if (!previouslyActive) {
addActivation(activation, true);
} else {
Timer timer = activation.getRule().getTimer();
if (timer != null && timer instanceof ExpressionIntervalTimer) {
ScheduledAgendaItem schItem = (ScheduledAgendaItem) activation;
removeScheduleItem(schItem);
scheduleItem(schItem, workingMemory);
}
}
}
}
/*
* (non-Javadoc)
*
* @see org.kie.common.AgendaI#clearActivationGroup(org.kie.spi.ActivationGroup)
*/
public void clearAndCancelActivationGroup(final InternalActivationGroup activationGroup) {
final EventSupport eventsupport = (EventSupport) this.workingMemory;
activationGroup.setTriggeredForRecency(this.workingMemory.getFactHandleFactory().getRecency());
for (final Iterator it = activationGroup.iterator(); it.hasNext(); ) {
final ActivationGroupNode node = (ActivationGroupNode) it.next();
final Activation activation = node.getActivation();
activation.setActivationGroupNode(null);
if (activation.isQueued()) {
activation.setQueued(false);
activation.remove();
eventsupport
.getAgendaEventSupport()
.fireActivationCancelled(activation, this.workingMemory, MatchCancelledCause.CLEAR);
}
}
activationGroup.reset();
}
/**
* Fire this item.
*
* @param activation The activation to fire
* @throws org.drools.core.spi.ConsequenceException If an error occurs while attempting to fire
* the consequence.
*/
public synchronized void fireActivation(final Activation activation) throws ConsequenceException {
// We do this first as if a node modifies a fact that causes a recursion
// on an empty pattern
// we need to make sure it re-activates
this.workingMemory.startOperation();
isFiringActivation = true;
try {
final EventSupport eventsupport = (EventSupport) this.workingMemory;
eventsupport
.getAgendaEventSupport()
.fireBeforeActivationFired(activation, this.workingMemory);
if (activation.getActivationGroupNode() != null) {
// We know that this rule will cancel all other activations in the group
// so lets remove the information now, before the consequence fires
final InternalActivationGroup activationGroup =
activation.getActivationGroupNode().getActivationGroup();
activationGroup.removeActivation(activation);
clearAndCancelActivationGroup(activationGroup);
}
activation.setQueued(false);
try {
this.knowledgeHelper.setActivation(activation);
if (log.isTraceEnabled()) {
log.trace("Fire \"{}\" \n{}", activation.getRule().getName(), activation.getTuple());
}
activation.getConsequence().evaluate(this.knowledgeHelper, this.workingMemory);
this.knowledgeHelper.cancelRemainingPreviousLogicalDependencies();
this.knowledgeHelper.reset();
} catch (final Exception e) {
if (this.legacyConsequenceExceptionHandler != null) {
this.legacyConsequenceExceptionHandler.handleException(activation, this.workingMemory, e);
} else if (this.consequenceExceptionHandler != null) {
this.consequenceExceptionHandler.handleException(
activation, this.workingMemory.getKnowledgeRuntime(), e);
} else {
throw new RuntimeException(e);
}
} finally {
if (activation.getFactHandle() != null) {
// update the Activation in the WM
InternalFactHandle factHandle = activation.getFactHandle();
workingMemory
.getEntryPointNode()
.modifyActivation(factHandle, activation.getPropagationContext(), workingMemory);
activation.getPropagationContext().evaluateActionQueue(workingMemory);
}
// if the tuple contains expired events
for (LeftTuple tuple = activation.getTuple(); tuple != null; tuple = tuple.getParent()) {
if (tuple.getLastHandle() == null) {
// can be null for eval, not and exists that have no right input
continue;
}
if (tuple.getLastHandle().isEvent()) {
EventFactHandle handle = (EventFactHandle) tuple.getLastHandle();
// decrease the activation count for the event
handle.decreaseActivationsCount();
// handles "expire" only in stream mode.
if (handle.isExpired()) {
if (handle.getActivationsCount() <= 0) {
// and if no more activations, retract the handle
handle.getEntryPoint().retract(handle);
}
}
}
}
}
eventsupport.getAgendaEventSupport().fireAfterActivationFired(activation, this.workingMemory);
unstageActivations();
} finally {
isFiringActivation = false;
if (mustNotifyHalt) {
mustNotifyHalt = false;
notifyHalt();
}
this.workingMemory.endOperation();
}
}