JESS: Bload question
Title: Bload question I performed a bsave from an engine that contains only shadow facts (and some simple rules). If I do a bload with that file into a new engine, are the facts that are loaded via the bload command remain shadow facts? Or do I need to re-definstance them in order to see modifications to the facts in working memory from my java app? Thanks. Scott
RE: JESS: Jess70b5 and Eclipse 3.1.1
Did you try to run eclipe with -clean after extracting the files? This worked for me. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jean-Frangois Lebeau Sent: Tuesday, January 10, 2006 2:32 PM To: jess-users@sandia.gov Subject: JESS: Jess70b5 and Eclipse 3.1.1 Hi, I'm a new JESS user, I'm trying to install the eclipse plug-in of Jess70b5 into Eclipse 3.1.1 and it doesn't seem to work. (Nothing new after I extract the files and I run eclipse again). Is there a version issue here ? Thanks for help. Jean-Frangois Lebeau Universiti of Sherbrooke, Qc, Canada. To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED]
JESS: Modifying JavaBeans
Title: Modifying JavaBeans
Sorry to bother everyone. I am trying to play around with JESS embedded in Java to get an understanding of JESS. I created a simple Java bean which contains two properties: range and qualRng. I create the fact within Jess utilizing defclass and definstance. Executing engine.facts() shows that the fact has been created in Jess's memory with the appropriate slots. I created a simple rule to check to see if range is below 20, if true, modify the qualRng slot to TRUE. I added code to main() decrement the initial value of range in order to fire the rule. Watching the results shows that the range slot decrements properly and the rule fires, but the qualRng field never gets updated to show TRUE. I am sure it is something simple, but I just don't see the problem. I've modified the RHS of the rule with all the different iterations I could think of but to no avail. The code is listed below (minus the java bean class). Thanks for your assistance.
import jess.*;
public class testFacts
{
public static void main(String[] args)
{
Value fact;
try
{
Rete engine = new Rete();
engine.watchAll();
engine.defclass(testTrkClass, testTrack, null);
testTrack trkOne = new testTrack(30, 45, 5);
fact = engine.definstance(testTrkClass, trkOne, true);
// Load rules clip file
engine.executeCommand((batch testTrk.clp));
engine.run();
// change range until it triggers a dummy doct rule
int i;
for(i = trkOne.getRange(); i 5; i--)
{
trkOne.setRange(i);
try
{
Thread.sleep(500);
}
catch (InterruptedException ie){}
}
}
catch (JessException je)
{
System.out.print(An error occurred at line + je.getLineNumber());
System.out.println( which looks like + je.getProgramText());
System.out.println(Message: + je.getMessage());
}
}
}
The clp file:
(defrule dummy-range-doctrine
;; set qualRng to true if trk is in range
?fact - (testTrkClass (range ?x:(= ?x 20)))
=
(modify ?fact (qualRng TRUE)))
Scott L. Krasnigor
Principal Engineer/Scientist
Atlantic Science Technology
Lockheed Martin - MS2
' 856-359-3094
* [EMAIL PROTECTED]
* 770-2
RE: JESS: Modifying JavaBeans
Thanks. Works like a champ. I had a feeling that it was something
simple.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of [EMAIL PROTECTED]
Sent: Wednesday, August 31, 2005 1:31 PM
To: jess-users@sandia.gov
Subject: Re: JESS: Modifying JavaBeans
Hi Scott,
Rules only fire during a call to run(). Your call to run() returns
immediately because when you call it, there are no rules eligible to
fire yet. Then you make some changes to the fact, and the
PropertyChangeEvents update the working memory, but you never call
run() again, so even when it is activated, the rule never fires.
You could call run() in your for loop, and then the rule would fire and
update the slot as expected. Note that it makes sense for this rule to
fire only once -- no reason to fire once the qualRng slot is TRUE, so
you might write the pattern like this:
(defrule dummy-range-doctrine
;; set qualRng to true if trk is in range
?fact - (testTrkClass (range ?x:(= ?x 20)) (qualRng ~TRUE))
=
(modify ?fact (qualRng TRUE)))
I think Krasnigor, Scott L (N-AST) wrote:
Sorry to bother everyone. I am trying to play around with JESS
embedded in Java to get an understanding of JESS. I created a simple
Java bean which contains two properties: range and qualRng. I create
the fact within Jess utilizing defclass and definstance. Executing
engine.facts() shows that the fact has been created in Jess's memory
with the appropriate slots. I created a simple rule to check to see if
range is below 20, if true, modify the qualRng slot to TRUE. I added
code to
main() decrement the initial value of range in order to fire the rule.
Watching the results shows that the range slot decrements properly and
the rule fires, but the qualRng field never gets updated to show TRUE.
I am sure it is something simple, but I just don't see the problem.
I've modified the RHS of the rule with all the different iterations I
could think of but to no avail. The code is listed below (minus the
java bean class). Thanks for your assistance.
import jess.*;
public class testFacts
{
public static void main(String[] args)
{
Value fact;
try
{
Rete engine = new Rete();
engine.watchAll();
engine.defclass(testTrkClass, testTrack,
null);
testTrack trkOne = new testTrack(30, 45, 5);
fact = engine.definstance(testTrkClass,
trkOne, true);
// Load rules clip file
engine.executeCommand((batch testTrk.clp));
engine.run();
// change range until it triggers a dummy doct
rule
int i;
for(i = trkOne.getRange(); i 5; i--)
{
trkOne.setRange(i);
try
{
Thread.sleep(500);
}
catch (InterruptedException ie){}
}
}
catch (JessException je)
{
System.out.print(An error occurred at line +
je.getLineNumber());
System.out.println( which looks like +
je.getProgramText());
System.out.println(Message: +
je.getMessage());
}
}
}
The clp file:
(defrule dummy-range-doctrine
;; set qualRng to true if trk is in range
?fact - (testTrkClass (range ?x:(= ?x 20)))
=
(modify ?fact (qualRng TRUE)))
Scott L. Krasnigor
Principal Engineer/Scientist
Atlantic Science Technology
Lockheed Martin - MS2
' 856-359-3094
* [EMAIL PROTECTED]
* 770-2
-
Ernest Friedman-Hill
Advanced Software Research Phone: (925) 294-2154
Sandia National LabsFAX: (925) 294-2234
PO Box 969, MS 9012 [EMAIL PROTECTED]
Livermore, CA 94550 http://herzberg.ca.sandia.gov
To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use
your own address!) List problems? Notify [EMAIL PROTECTED]
To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
in the BODY of a message to [EMAIL PROTECTED], NOT to the list
(use your own address!) List problems? Notify [EMAIL PROTECTED]
