// 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 ActivationGroup 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().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;