JESS: Bug?

[Yura]

Hi jess-users

JessDE doesn't parse this rule (saying: 'TRUE' is a symbol, not an integer):

(defrule rule (declare (salience (+ 1 1))) => )

whereas Jesp makes no complaints.

Yuri


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: Probelm with property change listeners in Jess7b4

[Dusan Sormaz]

I am running example that uses property change listeners to update shadow
fact when object changes. 
Problem that I have is that running same code in Jess7.0b2 and Jess7.0b4
produces different results. Here is the log for both:
Jess, the Rule Engine for the Java
Platform
Copyright (C) 2005 Sandia Corporation
Jess Version 7.0b4 11/1/2005
Jess> (require defclasses)
defclasses
Jess> (bind ?g (new Block G))

Jess> (definstance block ?g)

Jess> (facts)
f-0   (MAIN::block (class )
(name "G") (OBJECT
))
For a total of 1 facts in module MAIN.
Jess> (?g setName "gfd")
before PCS
after PCS
Jess> (facts)
f-0   (MAIN::block (class )
(name "G") (OBJECT
))
For a total of 1 facts in module MAIN.
Jess> 

Jess, the Rule Engine for the Java Platform
Copyright (C) 2005 Sandia Corporation
Jess Version 7.0b2 8/11/2005
Jess> (require defclasses)
defclasses
Jess> (bind ?g (new Block G))

Jess> (definstance block ?g)

Jess> (facts)
f-0   (MAIN::block (class
) (name "G") (OBJECT
))
For a total of 1 facts in module MAIN.
Jess> (?g setName "gfd")
before PCS
after PCS
Jess> (facts)
f-0   (MAIN::block (class
) (name "gfd") (OBJECT
))
For a total of 1 facts in module MAIN.
Jess> 

While Jess7.0b2 works as expected, Jess7.0b4 doe snot update fact
when object changes.
Any ideas why is this happening? 
Dusan Sormaz



*
* Dušan Šormaz, PhD, Associate
Professor 

* Ohio University
* Industrial and Manufacturing Systems Engineering Department
* 277 Stocker Center, Athens, OH 45701-2979
* phone: (740) 593-1545 
* fax:   (740) 593-0778  
* e-mail: [EMAIL PROTECTED] 
* url:

http://www.ent.ohiou.edu/~sormaz 
*
 

Re: JESS: Probelm with property change listeners in Jess7b4

[ejfried]

Hi,

In Jess 7.0b3, the default for definstance type changed from "dynamic"
to "auto". If you specified "dynamic" as the last argument to
definstance, then Jess would try to register itself with your Bean as
a PropertyChangeListener; this used to be the default, so that you had
to write "static" if you didn't want this behavior. The new default is
"auto". In this case, Jess looks at the Bean to see if it accepts
PropertyChangeListeners and only registers itself if the Bean does,
indeed, accept them.

Jess's current definition of "indeed accepts them" is that the
following two methods exist with these exact signatures:

public void addPropertyChangeListener(PropertyChangeListener);
public void removePropertyChangeListener(PropertyChangeListener);

So if this worked for you in "dynamic" mode, my guess is that your
Beans don't have the "removePropertyChangeListener" method. The right
thing to do is add it, but a band-aid would be to say

(definstance block ?g dynamic)

This will work until you try "undefinstance" which, of course, won't
work (it never did.)

If I've guessed wrong, and it's something else, let me know, please!

I think Dusan Sormaz wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> I am running example that uses property change listeners to update shadow 
> fact when object changes.
> 
> Problem that I have is that running same code in Jess7.0b2 and Jess7.0b4 
> produces different results. Here is the log for both:
> 
> Jess, the Rule Engine for the Java Platform
> Copyright (C) 2005 Sandia Corporation
> Jess Version 7.0b4 11/1/2005
> 
> Jess> (require defclasses)
> defclasses
> Jess> (bind ?g (new Block G))
> 
> Jess> (definstance block ?g)
> 
> Jess> (facts)
> f-0   (MAIN::block (class ) (name "G") (OBJECT 
> ))
> For a total of 1 facts in module MAIN.
> Jess> (?g setName "gfd")
> before PCS
> after PCS
> Jess> (facts)
> f-0   (MAIN::block (class ) (name "G") (OBJECT 
> ))
> For a total of 1 facts in module MAIN.
> Jess>
> 
> 
> Jess, the Rule Engine for the Java Platform
> Copyright (C) 2005 Sandia Corporation
> Jess Version 7.0b2 8/11/2005
> 
> Jess> (require defclasses)
> defclasses
> Jess> (bind ?g (new Block G))
> 
> Jess> (definstance block ?g)
> 
> Jess> (facts)
> f-0   (MAIN::block (class ) (name "G") 
> (OBJECT ))
> For a total of 1 facts in module MAIN.
> Jess> (?g setName "gfd")
> before PCS
> after PCS
> Jess> (facts)
> f-0   (MAIN::block (class ) (name "gfd") 
> (OBJECT ))
> For a total of 1 facts in module MAIN.
> Jess>
> 
> 
> While Jess7.0b2 works as expected, Jess7.0b4 doe snot update fact when 
> object changes.
> 
> Any ideas why is this happening?
> 
> Dusan Sormaz
> 
> 
> 
> *
> * Du_an _ormaz, PhD, Associate Professor
> * Ohio University
> * Industrial and Manufacturing Systems Engineering Department
> * 277 Stocker Center, Athens, OH 45701-2979
> * phone: (740) 593-1545
> * fax:   (740) 593-0778
> * e-mail: [EMAIL PROTECTED]
> * url: http://www.ent.ohiou.edu/~sormaz
> *  



-
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]

Re: JESS: Bug?

[ejfried]

I think Yura wrote:
[Charset koi8-r unsupported, filtering to ASCII...]
> Hi jess-users
> 
> JessDE doesn't parse this rule (saying: 'TRUE' is a symbol, not an integer):
> 
> (defrule rule (declare (salience (+ 1 1))) => )
> 
> whereas Jesp makes no complaints.

Yep. I can reproduce this and now that you point it out, I immediately
see what's happening. Thanks for the report.



-
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]

JESS: DefRule - Memory Leak

[Hariprasath Manivannan]

Hi Jess users,
 
In our application we are using Jess 5.0 extensively. During the memory leak testing, we could see that a lot of our application related objects and other primitive objects were not getting garbage collected. 

 
When we ran the memory leak detection tool - JProbe, from the memory reference graph, we could see that most of these leaking objects have a link to the root DefRule.
 
- Has anyone faced this issue with Jess5.0? If so please send the possible solutions.
- Also I would like to know if memory leak can happen if the CLP files are written improperly?
 
Please reply ASAP.
 
Regards,
Hari