Everything seems to be consistent with a problem in the
PropertyChangeEvent generated by a call to the setAdviceText() method
of the GlucoseDecision class. If a JavaBean offers
PropertyChangeListener support, then Jess depends on it working
correctly. For "static" definstances, if you call "modify" Jess
modifies both the shadow fact and the underlying JavaBean. For
dynamic ones (ones with PropertyChangeListener support) Jess modifies
only the Bean and relies on the ensuing PropertyChangeEvent to update
working memory. Either the event should contain the correct before
and after values, or it must be fired after the actual property
change is made. So can I see "GlucoseDecision.setAdviceText()?"
Alternatively, your Bean could be what Jess awkwardly calls a "non-
value class", ultimately meaning a class that defines a hashCode()
method whose value changes over time. This can cause various oddities
to occur. Tell Jess about this using the set-nonvalue-class function.
On Dec 8, 2006, at 6:51 AM, Mike Dean wrote:
The trace is below. The last part of each trace is a retraction of
the
fact after updating the shadow object. To me it looks like there is
only one actual modification of f-1 which makes no sense. If this
code
never had worked, I would be less puzzled because I would know I never
kludged it successfully in the first place.
First trace is patient with low glucose ON insulin. You will see that
the fact ends up with a calculated recommendedGlucoseBolus, so that
got
updated, but I don't see the actual change in f-1 in the trace (should
have occured in give-glucose-extreme). The second trace is same
patient
with low glucose but not on insulin.
==> Focus MAIN
==> f-0 (MAIN::initial-fact)
==> f-1 (MAIN::GlucoseDecision (acceptComment "") (adviceText "")
(carbohydrateStatus 1) (class <Java-Object:java.lang.Class>)
(currentInsulinDripRate 12.0) (decisionTimeStamp
<Java-Object:java.util.GregorianCalendar>) (declineComment "")
(glucoseChangePerHour nil) (id nil) (minutesToNextEvaluation 999999)
(observationDate <Java-Object:java.util.GregorianCalendar>)
(otherComment "") (patient
<Java-Object:edu.utah.cdmcc.entities.Patient>) (patientAgeDays 2550)
(patientHeight 72.86) (patientWeight 30.34) (pcs
<Java-Object:java.beans.PropertyChangeSupport>)
(previousGlucoseConcentration -1) (previousObservationTime nil)
(rationaleText "") (recommendedGlucoseBolus 0.0)
(recommendedInsulinBolus 0.0) (recommendedInsulinDripRate 0.0)
(rulesFiredText "") (serumGlucoseConcentration 12) (userAction
"Pending") (valid TRUE) (version 0) (OBJECT
<Java-Object:edu.utah.cdmcc.entities.GlucoseDecision>))
==> Activation: MAIN::is-child : f-1
==> Activation: MAIN::current-glucose-range : f-1
==> Activation: MAIN::is-insulin-on-or-off : f-1
==> f-2 (MAIN::currentGlucoseBelowRange)
==> Activation: MAIN::mild-hypoglycemia-definition : f-2, f-1
==> Activation: MAIN::moderate-hypoglycemia-definition : f-2, f-1
==> Activation: MAIN::extreme-hypoglycemia-definition : f-2, f-1
==> f-3 (MAIN::extremeHypoglycemia)
==> Activation: MAIN::give-glucose-extreme : f-3, f-1
==> f-4 (MAIN::recommendedGlucoseBolus)
==> f-5 (MAIN::pediatric)
==> f-6 (MAIN::insulinOn)
==> Activation: MAIN::hypoglycemia-need-insulin-off : f-2, f-6
==> f-7 (MAIN::needInsulinOff)
==> Activation: MAIN::recommend-off-insulin : f-7, f-1
==> f-8 (MAIN::recommendedInsulinOff)
<== Focus MAIN
<=> f-1 (MAIN::GlucoseDecision (acceptComment "") (adviceText
"Turn OFF
the insulin drip.") (carbohydrateStatus 1) (class
<Java-Object:java.lang.Class>) (currentInsulinDripRate 12.0)
(decisionTimeStamp <Java-Object:java.util.GregorianCalendar>)
(declineComment "") (glucoseChangePerHour nil) (id nil)
(minutesToNextEvaluation 999999) (observationDate
<Java-Object:java.util.GregorianCalendar>) (otherComment "") (patient
<Java-Object:edu.utah.cdmcc.entities.Patient>) (patientAgeDays 2550)
(patientHeight 72.86) (patientWeight 30.34) (pcs
<Java-Object:java.beans.PropertyChangeSupport>)
(previousGlucoseConcentration -1) (previousObservationTime nil)
(rationaleText "The patient is receiving insulin despite being
hypoglycemic.") (recommendedGlucoseBolus 15.17)
(recommendedInsulinBolus
0.0) (recommendedInsulinDripRate 0.0) (rulesFiredText "")
(serumGlucoseConcentration 12) (userAction "Pending") (valid TRUE)
(version 0) (OBJECT
<Java-Object:edu.utah.cdmcc.entities.GlucoseDecision>))
<== f-1 (MAIN::GlucoseDecision (acceptComment "") (adviceText
"Turn OFF
the insulin drip.") (carbohydrateStatus 1) (class
<Java-Object:java.lang.Class>) (currentInsulinDripRate 12.0)
(decisionTimeStamp <Java-Object:java.util.GregorianCalendar>)
(declineComment "") (glucoseChangePerHour nil) (id nil)
(minutesToNextEvaluation 999999) (observationDate
<Java-Object:java.util.GregorianCalendar>) (otherComment "") (patient
<Java-Object:edu.utah.cdmcc.entities.Patient>) (patientAgeDays 2550)
(patientHeight 72.86) (patientWeight 30.34) (pcs
<Java-Object:java.beans.PropertyChangeSupport>)
(previousGlucoseConcentration -1) (previousObservationTime nil)
(rationaleText "The patient is receiving insulin despite being
hypoglycemic.") (recommendedGlucoseBolus 15.17)
(recommendedInsulinBolus
0.0) (recommendedInsulinDripRate 0.0) (rulesFiredText "")
(serumGlucoseConcentration 12) (userAction "Pending") (valid TRUE)
(version 0) (OBJECT
<Java-Object:edu.utah.cdmcc.entities.GlucoseDecision>))
==> Focus MAIN
==> f-0 (MAIN::initial-fact)
==> f-1 (MAIN::GlucoseDecision (acceptComment "") (adviceText "")
(carbohydrateStatus 1) (class <Java-Object:java.lang.Class>)
(currentInsulinDripRate 0.0) (decisionTimeStamp
<Java-Object:java.util.GregorianCalendar>) (declineComment "")
(glucoseChangePerHour nil) (id nil) (minutesToNextEvaluation 999999)
(observationDate <Java-Object:java.util.GregorianCalendar>)
(otherComment "") (patient
<Java-Object:edu.utah.cdmcc.entities.Patient>) (patientAgeDays 2550)
(patientHeight 72.86) (patientWeight 30.34) (pcs
<Java-Object:java.beans.PropertyChangeSupport>)
(previousGlucoseConcentration -1) (previousObservationTime nil)
(rationaleText "") (recommendedGlucoseBolus 0.0)
(recommendedInsulinBolus 0.0) (recommendedInsulinDripRate 0.0)
(rulesFiredText "") (serumGlucoseConcentration 12) (userAction
"Pending") (valid TRUE) (version 0) (OBJECT
<Java-Object:edu.utah.cdmcc.entities.GlucoseDecision>))
==> Activation: MAIN::is-child : f-1
==> Activation: MAIN::current-glucose-range : f-1
==> Activation: MAIN::is-insulin-on-or-off : f-1
==> f-2 (MAIN::currentGlucoseBelowRange)
==> Activation: MAIN::mild-hypoglycemia-definition : f-2, f-1
==> Activation: MAIN::moderate-hypoglycemia-definition : f-2, f-1
==> Activation: MAIN::extreme-hypoglycemia-definition : f-2, f-1
==> f-3 (MAIN::extremeHypoglycemia)
==> Activation: MAIN::give-glucose-extreme : f-3, f-1
==> f-4 (MAIN::recommendedGlucoseBolus)
==> f-5 (MAIN::pediatric)
==> f-6 (MAIN::insulinOff)
<== Focus MAIN
<=> f-1 (MAIN::GlucoseDecision (acceptComment "") (adviceText
"Administer glucose (0.50 gm/kg = 15.17 grams).")
(carbohydrateStatus 1)
(class <Java-Object:java.lang.Class>) (currentInsulinDripRate 0.0)
(decisionTimeStamp <Java-Object:java.util.GregorianCalendar>)
(declineComment "") (glucoseChangePerHour nil) (id nil)
(minutesToNextEvaluation 999999) (observationDate
<Java-Object:java.util.GregorianCalendar>) (otherComment "") (patient
<Java-Object:edu.utah.cdmcc.entities.Patient>) (patientAgeDays 2550)
(patientHeight 72.86) (patientWeight 30.34) (pcs
<Java-Object:java.beans.PropertyChangeSupport>)
(previousGlucoseConcentration -1) (previousObservationTime nil)
(rationaleText "The patient is extremely hypoglycemic (< 40 mg/dL).")
(recommendedGlucoseBolus 15.17) (recommendedInsulinBolus 0.0)
(recommendedInsulinDripRate 0.0) (rulesFiredText "")
(serumGlucoseConcentration 12) (userAction "Pending") (valid TRUE)
(version 0) (OBJECT
<Java-Object:edu.utah.cdmcc.entities.GlucoseDecision>))
<== f-1 (MAIN::GlucoseDecision (acceptComment "") (adviceText
"Administer glucose (0.50 gm/kg = 15.17 grams).")
(carbohydrateStatus 1)
(class <Java-Object:java.lang.Class>) (currentInsulinDripRate 0.0)
(decisionTimeStamp <Java-Object:java.util.GregorianCalendar>)
(declineComment "") (glucoseChangePerHour nil) (id nil)
(minutesToNextEvaluation 999999) (observationDate
<Java-Object:java.util.GregorianCalendar>) (otherComment "") (patient
<Java-Object:edu.utah.cdmcc.entities.Patient>) (patientAgeDays 2550)
(patientHeight 72.86) (patientWeight 30.34) (pcs
<Java-Object:java.beans.PropertyChangeSupport>)
(previousGlucoseConcentration -1) (previousObservationTime nil)
(rationaleText "The patient is extremely hypoglycemic (< 40 mg/dL).")
(recommendedGlucoseBolus 15.17) (recommendedInsulinBolus 0.0)
(recommendedInsulinDripRate 0.0) (rulesFiredText "")
(serumGlucoseConcentration 12) (userAction "Pending") (valid TRUE)
(version 0) (OBJECT
<Java-Object:edu.utah.cdmcc.entities.GlucoseDecision>))
Finally, I show the code below that calls Jess:
private void fireRulesEngine() {
emptyTrace.setText("");
SWTTextWriter invisibleTraceWriter = new
SWTTextWriter(emptyTrace);
Rete r = GlucosePlugin.getDefault().getRete();
r.addOutputRouter("traceOut", invisibleTraceWriter);
try {
r.reset();
r.setWatchRouter("traceOut");
} catch (JessException e1) {
displayExceptionInformation(e1);
}
try {
r.add(decision);
r.watchAll();
r.run();
r.updateObject(decision);
r.undefinstance(decision);
System.out.println(decision.getAdviceText());
} catch (JessException e) {
displayExceptionInformation(e);
}
// If no advice resulted from running the inference
engine
if (decision.getAdviceText().length() == 0) {
decision.setAdviceText("No change at this
time.");
}
// Get the rule trace text and stick it into the
decision object
decision.setRulesFiredText(emptyTrace.getText().toString());
// Fire property change so listeners can act
GlucosePlugin.getDefault().fireDecisionChanged(decision);
}
Thank you for your help with this.
- Mike
J. Michael Dean, M.D., M.B.A.
H.A. and Edna Benning Presidential Professor of Pediatrics
Professor of Family and Preventive Medicine
Professor of Biomedical Informatics
Chief, Division of Pediatric Critical Care
Vice Chairman, Department of Pediatrics
University of Utah School of Medicine
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