Re: JESS: Building Jess in Eclipse: A Walkthrough
Hi ! thanks for the tutorial. I think you can use some shortcut : you drag/drop sources when you could have done something quicker : declare your project to point to your source directory, then right-clik on the project, and select refresh. Eclipse will map all your files to its internal structure. Then, you'll have to explain eclipse that the source folder is, say, src. So right click again on the project name and new - source folder. Your are really true about the fact that eclipse could be very destructive ! Think about CVSizing your project BEFORE adding it to eclipse. As Eclipse has a pretty good CVS capability, it will also give you an oppoturnity to mess with your project with no trouble. You could explain Eclipse that it must use a JRE for all your projetcs : windows-preferences-Java-Installed JRE - set the default JRE that you need. WARNING : this JRE will the be used by all the projects in your workspace. I don't know if there is a way to use a specific JRE for a simple project (I don't think so) Sorry, I can't answer your question about Javadoc. I'm using Ant to do it, as it's a kind of packaging task to me. Le lun 31/05/2004 ` 10:06, Eric Wang a icrit : I am a relative newbie in Jess, a total newbie in Eclipse, and a newbie in Java. Still, programming is programming. If you're good in any language, you're good, modulo syntax. Here I give a walkthrough for building Jess 6.1p7 using Eclipse. You'd need a Jess source license to use this. Apologies if this is old hat for the experts out there. It took me 8 whole hours to figure this stuff out the first day I ever laid my eyes on Eclipse :) One of my goals is to gain feedback on this process. If you spot anything I'm doing wrong, or less effectively than I could, please let me know. === A. Overview: Config === My current configuration is as follows. - Windows XP (also works on 2k) - Eclipse 3.0 M9 - Java 2 SDK 1.4.2_04 (for Eclipse itself, per Eclipse's own recommendations) - Java 2 SDK 1.5.0 Beta 2 build 51 (what I use for all other dev, including Jess) - Jess 6.1p7 - Emacs for Windows 21.3.1 (see section D for my fix for jess-mode.el) If you use a different Java compiler or development environment, the details will differ, but the workflow should be similar. I am following Ernest to the dark side of Emacs and Eclipse ^_^ === B. Java and Eclipse === B1. Install a stable Java 1.4.2_x. I use the latest Sun release, 1.4.2_04. Eclipse recommends that you don't use the 1.5.0 Beta for it (yet). (I actually did use Eclipse with 1.5.0 Beta 1 for a month, with no problems, but better to be safe.) B2. Install Eclipse 3.0 M9. B3. Make a shortcut to the eclipse.exe executable. Edit its properties, and in its Target field, append the -vm arg to specify your pre-1.5.0 Java MV, e.g. C:\Program Files\Eclipse\eclipse.exe -vm C:\Program Files\Java\j2re1.4.2_04\bin\javaw B4. Move the shortcut somewhere nice. I put it in my IE Quick Launch bar, which is in C:\Documents and Settings\$Me\Application Data\Microsoft\ Internet Explorer\Quick Launch\. Note that I've already made the decision to use Java 1.5.0 for everything else. I am happy to be a guinea pig. (Also, I love how Java 1.5 felt the need to add generic types, using essentially the same angle-bracket syntax as C++ templates. Some wheels are just too good to not reinvent.) If you prefer to use stable Java, just set your $CLASSPATH and $PATH to point to your #B1, and skip to section C. B5. Install Java 1.5.0 Beta 2. Edit your $CLASSPATH and $PATH to point to 1.5.0 only. Then you'll use 1.5.0 for everything ese, but Eclipse will still use 1.4.2_04 (as long as you always launch it using the shortcut in #B4). My env vars are set to: CLASSPATH C:\Program Files\Java\j2re1.5.0\lib\rt.jar;D:\Develop\Sandia\Jess61p7;. PATH C:\Program Files\Java\j2re1.5.0\bin;C:\Program Files\Java\j2sdk1.5.0\bin === C. Eclipse and Jess === Eclipse stores local copies of .java source files in its own workspace. It can deliver its compiled .class files to a different output folder. (You can see my output folder in my $CLASSPATH variable above.) C0. Eclipse manages a workspace, which is a hierarchy of projects and files. This is directly mimicked as a file hierarchy on your disk. Basically, what you see (in Eclipse) is what you get (in Windows Explorer). File operations done in either domain tend to be reflected in the other domain automatically. Let $Eclipse/workspace denote my default Eclipse workspace. (By default, Eclipse will create this in its own installation directory, but I pointed mine elsewhere.) C1.
Re: JESS: Jess IDE - Eclipse plug-in
Don't worry ! You don't have to bind anything by yourself, it's already an Eclipse 2.1 feature (Window - preference - Workspace - Editor -Key Binding - emacs). Just a perfect tool! Quoting [EMAIL PROTECTED]: emmanuel lecharny [EMAIL PROTECTED] writes: Eclipse will probably become the 21st century's emacs ... Can you bind your keystrokes to be similar to emacs' ? myriam 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]
Re: JESS: Jess IDE - Eclipse plug-in
Quoting [EMAIL PROTECTED]: That's exactly me! I'm sure Eclipse has all the bells and whistle of a good editor and worth knowing but I prefer to have an editor I can count on being there over the years and across many languages. I use the beanshell in emacs to test Java snippets as an interpreter and that works well for me. Eclipse won't change anything for you as it works directly with the files on your filesystem. You can work on a file with emacs/vi/ed/wathever and regenerate the workspace when/if you're back to eclipse. The Best from two differents world for free ! Eclipse will probably become the 21st century's emacs ... 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: Jess IDE - Eclipse plug-in
Hi, consider that if you are using Jess as a part of a complete Java application (especially if you are writing a J2EE compliant application), a Jess plugin is just something that is very usefull. You don't have to switch to another UI to develop/debug/tune your code, as it's fully a part of the IDE your are using (Eclipse or WSAD, make your choice). my .02 Quoting [EMAIL PROTECTED]: Hi Folks, As you may know, Jess 7.0 (Charlemagne) is going to include a full complement of developer's tools -- a debugger, a smart editor, a rule database, an explorer, etc. I've been working on some of the technology that will go into these tools -- I have weak prototypes already, actually. Error checking as you type, smart completion, breakpoints, etc. It's pretty neat, actually, but really just a prototype. Originally, I had considered doing the Jess IDE as one or more Eclipse plug-ins. I weighed the advantages (lots of good tools to leverage) vs the disadvantages (big (60MB?) download for non-Eclipse users, additional support responsibilities for me, again for non-Eclipse users). I decided against it; although it would mean more work up-front to make the tools stand alone, it would require less work in the long run to support and maintain (or so my belief is.) Given the recent Eclipse discussions, though, I am reconsidering. Let me ask you all directly: Would you rather see a Jess IDE be a standalone thing, or an Eclipse plug-in? I'm more interested in hearing from people who think this is a BAD idea -- I already know that current Eclipse users will think it's a good one! - Ernest Friedman-Hill Distributed Systems ResearchPhone: (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]
Re: JESS: business rules: JESS v Versata v ILOG's JRules
Hi John, I've used Jess Ilog rules last year and found that JRules was less than 5% faster than Jess. Regarding that it was an old version of Jess (5.x), may be both products had evolved in a good direction, so it's not that easy to say right now which one is the best. Ilog is bundled with an IDE and an integrated debugger, it's supposed to help you writing rules, but I don't think that it's an idea that is really important. When you're stuck in one hundred rules and ten thousands facts and your engine just don't give you the expected answer, a gallon of strong coffee, one full week-end and a clear brain are surely more helpfull! Marketing ... I must say that I've used an abstract layer above those two products because my client didn't want to choose a product at the beginning of the project, so the rules where basically the same, and I didn't used any optimization that seems to be offered by Ilog. Both of those two products are equally efficient, but I must admit that I prefer Jess, because its syntax is much more easy to understand, and it's easier to implement in a Java program. (it's cool to be able to import a txt file containing a rule !) I don't know anything about Versata. Just my 2 cents... En réponse à John Norris [EMAIL PROTECTED]: Hi all, Does anyone have any observations regarding using JESS as a business rules engine (multi-user, on top of a SQL database)? Any thoughts on JESS v JRules or JESS v Versata? TIA, John 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]
RE: JESS: publications / Forgy paper
I did made jeops work for a few semples. The way it works is that it generates a Java program from the rules you provide. Of course, it's not possible to add a rule on the fly, which is not cool as Jess, but it works fine. I'm pretty sure that I can found the sample I've compiled a year ago, and post it to you next week. Do you have a JRules sample of Manner 128 benchmark? It'll ease the test on jeops. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of James C. Owen Sent: vendredi 1 fevrier 2002 23:23 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: JESS: publications / Forgy paper Exactamundo! He (Dr. Forgy) is very protective about the Rete 2 algorithm. Seems that he *had* to make the Rete algorithm public since it was funded by the DOD when he was at CMU, but methinks that he wants to make some money with the Rete 2 algorithm. The Rete 2 works on optimizing memory space thereby increasing the speed. Actually, he's working on a Rete 3 but I have no idea what it is; only that it will make the process even faster than Rete 2. Cool However, I'll see if we can get his Rete Ph.D. thesis scanned and published - maybe this weekend. If so, I'll send it to Dr. Friedman-Hill to publish on the PST site if he likes. BTW, Dr. Forgy's email is [EMAIL PROTECTED], not [EMAIL PROTECTED] :-) One other thing; I've been going over the various Java systems (Jess, OPSJ, JRules, Advisor and JEOPS) the past couple of weeks and trying to run the manners 128 benchmark on all of them using the same set of data and, basically, the same set of rules. That way only the engine is the difference factor. If anyone already has the JEOPS worked out, I would appreciate it if you would send it to me. I got CLIPS and converted it straight over to Jess - which wasn't terribly difficult since they both seem to be be LISP oriented. (Jim really hates LISP! All those parentheses and special markers for variables and just the jumbled way things are handled...) And I already had the code for OPSJ, Advisor and JRules. JEOPS seems to be a different animal since it is more Java-kinda oriented syntax. Whatever. Just a thought. SDG jco - James C. Owen Senior KE Knowledgebased Systems Corporation 6314 Kelly Circle Garland, TX 75044 972.530.2895 [EMAIL PROTECTED] wrote: I think Oliver Hoffmann wrote: James, if you could scan Dr. Forgy's thesis and convert it to pdf, that would be great :) is there also a publication on the Rete II algorithm? http://www.pst.com/ claims that it would be much faster... Nope, it's unpublished and proprietary. - Ernest Friedman-Hill Distributed Systems ResearchPhone: (925) 294-2154 Sandia National LabsFAX: (925) 294-2234 Org. 8920, MS 9012 [EMAIL PROTECTED] PO Box 969 http://herzberg.ca.sandia.gov Livermore, CA 94550 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] 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: anyboday have a free ware RETE implementation in Java
There is a free implementation (as far as I remember) called Jeops, but it's not as cool as jess (it's basically a pre-compiler, that generates Java Classes) At least, it works... (I've tested it) http://sourceforge.net/projects/jeops/ God is dead. Nietszche. Nietszche is dead. God ;) -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Arman AnwarSent: mardi 13 novembre 2001 21:31To: [EMAIL PROTECTED]Subject: JESS: anyboday have a free ware RETE implementation in Java Greetings, I have been using JESS and CLIPS for a number of years in my academic work. I have recently dicovered that one has to go through a lenghty form driven process to get access to source code. Annoyed by this I'm thinking of writing a barebones Rete engine that people can use for writing expertsystems. It will have no-nonsense GPL type license and no forms to fill out !!! I waswondering if someone knew of a clean freeware RETE implementation that I could use to start. I cannot use JESS as the licesnse does not permit it and CLIPS is not the easiest to take inspiration from. Any help would be grately appreciated. Arman. Bob Stewart [EMAIL PROTECTED] wrote: Hi,I am looking for a way convert user-inputed rules into Jess rules. I am able to controlthe interface, but it is not trivial to convert the following user inputed statement:If ( (x=1) OR (fname=bo*)) Then (set priority=1).The problem I am having is that I am usingDr. Leff's XML integration, which turns XMLinto Jess facts. The facts look like:(Tag (TagName x) (Text 1))(Tag (TagName fname) (Text Bob))The rule would then need to look something like:(defrule Rule1(Tag (TagName x) (Text "1"))(Tag (TagName fname) (Text ?name:(call startswith?name "bo"))Has anyone worked on parsing readable user input intojess syntax?Thanks,Bob__Do You Yahoo!?Find the one for you at Yahoo! Personalshttp://personals.yahoo.com--! --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]He, Who is capable of attempting the absurd, Is capable of achieving the impossible. Do You Yahoo!?Find the one for you at Yahoo! Personals.
JESS: Nietzsche, was Nietszche ;(
Oops, sorry !!! Quickly typed, quickly copy/pasted, what a zschame !!! (btw, found on a wall of the Metro, in Paris) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Oliver Hoffmann Sent: mercredi 14 novembre 2001 19:47 To: [EMAIL PROTECTED] Subject: JESS: Nietzsche Am 11/14/2001 7:11:45 PM, schrieb Emmanuel Lecharny [EMAIL PROTECTED]: God is dead. Nietszche. Nietszche is dead. God ;) my personal contribution to the correct spelling of German philosophers in international email lists: Nietzsche ;) Oliver Hoffmann (still very much alive) 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]
RE: JESS: Creating templates with nil default value using theJAVA API
Just using addSlot(Id, Funcall.NIL, ANY) should work in your case (this is the way jess do when it parses a deftemplate slot without default value) Emmanuel Lecharny, IKTEK 06 08 33 32 61, www.iktek.com http://www.iktek.com -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la part de Mathieu Bonnet Envoye : mercredi 25 juillet 2001 11:31 A : [EMAIL PROTECTED] Objet : JESS: Creating templates with nil default value using the JAVA API Hi, I'm using the JAVA API to create templates but I can't manage to get nil as a default value. There isn't any example with nil as a default value in section 4 of the user manual. I tried to use addSlot(Id,new Value(null, RU.INTEGER), INTEGER) or addSlot(Id, null, INTEGER) but both don't work. I'm using Jess60a2. Could you give me some hints ? (how to get a nil atom in Java or how to create a slot with no default value) Thanks in advance, Regards, Mathieu BONNET -- Mathieu BONNET NAL Intern Tel: 2549 - 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: in strings
Hi, just a question about strings and : I want to store a string and fetch it from a Java program. This string contains some , as it is a subset of HTML tags (ie : a href=link ...) I bound a variable to this string : (bind ?a a href \link\) and stored it : (store a-tag ?a) If I printout it : (printout t ?a t) , I get : a href=link, which is what I'm waiting for. But in my java program, when I fetch this a-tag, I get a href=\link\. I must admit that I fetch somtehing that IS a string but that could be something else, so I tried just to toString the value I got. This is the point, as if I use the stringValue method, I just get what I expected, but as I don't really know (in this part of my program) if it will be a String or a float, I prefer to send the result as a String to the caller. In the Value class, the toString transform a String by adding a \ before each : case RU.STRING: return \ + escape((String) m_objectval) + \; Is this a normal behavior? does it have an impact if the String is not escaped? Emmanuel Lecharny, IKTEK 06 08 33 32 61, www.iktek.com http://www.iktek.com -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la part de [EMAIL PROTECTED] Envoye : mercredi 20 juin 2001 16:18 A : Jess Mailing List Objet : JESS: Progress report Hi Folks, Thought I would let you in on my current activities and the release plan for Jess 6.0a7. One of the major features in my original plan for Jess 6 was fully nestable, tree-structured rule left-hand-sides: (and), (or), and (not) conditional element groups could be used to build complex logical structures. Given the way Jess is designed, this turned out to be harder than I thought. Many of you know that there have been undocumented (and) and (or) conditional elements in Jess 6 for several releases now. They worked well in simple cases, but didn't work well when combined with (not) and (exists) CEs. For the 6.0a7 release, the original plan is finally realized. I have fully nestable CEs working perfectly -- right now all that's left to do is to update the documentation. This will be done in short order, so you can expect to see Jess 6.0a7 come out next week sometime. - Ernest Friedman-Hill Distributed Systems ResearchPhone: (925) 294-2154 Sandia National LabsFAX: (925) 294-2234 Org. 8920, MS 9012 [EMAIL PROTECTED] PO Box 969 http://herzberg.ca.sandia.gov Livermore, CA 94550 - 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] -
RE: JESS: in strings
Well, hmm, yes, this is what I actually use, and it works pretty well. I
didn't want to use it in the first place (the dark side of the force is
always tempting ;), but I must admit that it was a mistake.
Thanks a lot for the quick answer.
Emmanuel Lecharny, IKTEK
06 08 33 32 61, www.iktek.com http://www.iktek.com
-Message d'origine-
De : friedman_hill ernest j [mailto:[EMAIL PROTECTED]]
Envoye : mercredi 20 juin 2001 20:18
A : Emmanuel Lecharny
Cc : 'Jess Mailing List'
Objet : Re: JESS: in strings
Value.stringValue() will convert almost any kind of Value to a String,
including floats, so why not use it?
public String stringValue(Context c) throws JessException
{
switch (m_type)
{
case RU.ATOM:
case RU.STRING:
case RU.VARIABLE:
case RU.MULTIVARIABLE:
case RU.SLOT:
case RU.MULTISLOT:
return (String) m_objectval;
case RU.INTEGER:
return String.valueOf(m_intval);
case RU.FLOAT:
return String.valueOf(m_floatval);
case RU.EXTERNAL_ADDRESS:
return m_objectval.toString();
default:
throw typeError(stringValue, Not a string);
}
}
The string produced by Value.toString() is meant to be suitable for
writing out to a file and later reparsed; it's employed during
save-facts, for example.
I think Emmanuel Lecharny wrote:
Hi,
just a question about strings and : I want to store a string and fetch
it
from a Java program. This string contains some , as it is a subset of
HTML
tags (ie : a href=link ...)
I bound a variable to this string : (bind ?a a href \link\) and
stored
it : (store a-tag ?a)
If I printout it : (printout t ?a t) , I get : a href=link, which is
what I'm waiting for. But in my java program, when I fetch this a-tag, I
get
a href=\link\.
I must admit that I fetch somtehing that IS a string but that could be
something else, so I tried just to toString the value I got. This is the
point, as if I use the stringValue method, I just get what I expected, but
as I don't really know (in this part of my program) if it will be a String
or a float, I prefer to send the result as a String to the caller.
In the Value class, the toString transform a String by adding a \ before
each :
case RU.STRING:
return \ + escape((String) m_objectval) + \;
Is this a normal behavior? does it have an impact if the String is not
escaped?
-
Ernest Friedman-Hill
Distributed Systems ResearchPhone: (925) 294-2154
Sandia National LabsFAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
-
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: Stuck
D Typoes !!! In your rule2_ReservationToCheckout rule you have days-requested instead of days-required : (defrule rule2_ReservationToCheckout (current-name ?current-name) (reservation (start-date ?start-date)(days-required ?days-requested) ... Emmanuel Lecharny, IKTEK 06 08 33 32 61, www.iktek.com http://www.iktek.com -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la part de Michael McConnell Envoye : mercredi 13 juin 2001 22:58 A : jess Objet : JESS: Stuck I know, I know -- rtfm. I HAVE. I don't see it. This problem probably doesn't need the scrutiny of Dr. Friedman-Hill, but... I am completely mystified by whatever I am doing wrong. If anyone could be so kind as to degne to share a few pearls with me, they will undoubledly attain much good karma. Jess (batch AVIS\\avis-proto.clp) Jess reported an error in routine ValueVector.get while executing (batch AVIS\avis-rules-proto-rules.clp) while executing (batch AVIS\avis-proto.clp). Message: Bad index -3 in call to get() on this vector: (name nil -1 loc nil -1 s 1 days-required nil -1 rate-type nil -1 res-num nil -1 car-group-name nil -1). Program text: ( batch AVIS\avis-proto.clp ) at line 1. at jess.ValueVector.get(Unknown Source) at jess.Deftemplate.getSlotType(Unknown Source) at jess.Jesp.a(Unknown Source) at jess.Jesp.int(Unknown Source) at jess.Jesp.case(Unknown Source) at jess.Jesp.do(Unknown Source) at jess.Jesp.char(Unknown Source) at jess.Jesp.parse(Unknown Source) at jess.Batch.batch(Unknown Source) at jess.Batch.call(Unknown Source) at jess.d2.a(Unknown Source) at jess.Funcall.execute(Unknown Source) at jess.Jesp.a(Unknown Source) at jess.Jesp.char(Unknown Source) at jess.Jesp.parse(Unknown Source) at jess.Batch.batch(Unknown Source) at jess.Batch.call(Unknown Source) at jess.d2.a(Unknown Source) at jess.Funcall.execute(Unknown Source) at jess.Jesp.a(Unknown Source) at jess.Jesp.char(Unknown Source) at jess.Jesp.parse(Unknown Source) at jess.Main.execute(Unknown Source) at jess.Main.main(Unknown Source) Jess - rules.clp file attached. Regards. Michael __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ - 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: Undefined variable referenced
Hi, that's strange, because it's working on a jess 6.0a5 version. Are you using this version? : C:\Jessjava -classpath . jess/Main Jess, the Java Expert System Shell Copyright (C) 1998 E.J. Friedman Hill and the Sandia Corporation Jess Version 6.0a5 3/12/2001 Jess (deftemplate AA (slot name) (slot n2)) TRUE Jess (defrule tt (AA (name ?name) (n2 ?n2~?name)) = (printout t diff crlf)) TRUE Jess (assert (AA (name aa) (n2 bb))) Fact-0 Jess (run) diff 1 Jess (assert (AA (name aa) (n2 aa))) Fact-1 Jess (run) 0 Jess Emmanuel Lecharny, IKTEK 06 08 33 32 61, www.iktek.com http://www.iktek.com -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la part de Thomas Gentsch Envoye : samedi 26 mai 2001 14:58 A : Jess Objet : JESS: Undefined variable referenced Hello there, discovered some behavior, which doesn't make sense to me: (defrule warn-if-low (tank (name ?name) (another_name ?n2~?name) (low TRUE) (intact TRUE)) ... If I do this Jess complains that I use ?name before defining it (the beans are OK) - seems to be like a parser bug (?) Does somebody know a fix/workaround besides changing the rule by adding a (test (neq ?n2 ?name)) Thanks a lot, tge -- Thomas Gentsch - 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] -
RE: JESS: Problem with if and multiple expressions with userfunction call
My code is throwing an exception in the If.java class.
The reason is : the updateDB-my-fact returns null, which is not allowed in
the if function.
As if is a function, it searchs for the else function in its parameters.
Of couse, as my function returns null, Jess can't compare it with else, so
I obtain an exception.
Of course, my function could have returned a Value, but as far as it just
set a flag, it didn't. And it works well in the RHS part of other rules, so
this is a special case.
Guideline : a user-defined function MUST return a Value in order to be used
in a if expression.
Emmanuel Lecharny, IKTEK
06 08 33 32 61, www.iktek.com http://www.iktek.com
-Message d'origine-
De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De
la part de [EMAIL PROTECTED]
Envoye : vendredi 11 mai 2001 13:24
A : =?iso-8859-1?Q?Emmanuel_L=E9charny?=
Cc : [EMAIL PROTECTED]
Objet : Re: JESS: Problem with if and multiple expressions with user
function call
The exception message Error during execution is what the
Funcall.execute() method says when a called Java function throws an
exception. In this case, the stack trace you get from catching the
JessException and printing it out isn't necessarily the most
informative one -- you want the exception object thrown by the Java
method. That exception, thrown by your Java function, would most
likely tell you what the problem is. So, when you write Java code to
work with Jess, you should handle JessExceptions something like this:
} catch (JessException re) {
if (re.getNextException() != null) {
System.out.println(re.toString());
System.out.print(\nNested exception is:\n);
System.out.print.println(re.getNextException().getMessage());
re.getNextException().printStackTrace(System.out);
} else
re.printStackTrace(m_rete.getErrStream());
If you make these changes, you'll probably find out right away what is
going wrong.
I think =?iso-8859-1?Q?Emmanuel_L=E9charny?= wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hi,
I have a problem when I use a multiple expression, in which I call a user
function in a if-then-else statement :
... (rule)
?my-fact - (STUFF (value ?value))
(CONTROL (current-value ?cv) (maximum ?max))
=
(bind ?new-value (+ ?cv ?value)
(if (= ?new-value ?max)
then
(modify ?my-fact (state 4) (value ?new-value))
(updateDB-my-fact ?my-fact-id 4 ?new-value)
else
(modify ?my-fact (state 2) (value ?new-value))
(updateDB-my-fact ?my-fact-id 2 ?new-value)
)
This is what I get (I don't know if I deserve it ;) :
Jess reported an error in routine Funcall.execute
while executing (if (= ?new-value ?max) then (modify-n ?my-fact
External-Address:[I 4 External-Address:[I ?new-value)
(updateDB-my-fact ?my-fact-id 4 ?new-value) else (modify-n ?my-fact
External-Address:[I 2 External-Address:[I
?new-value) (updateDB-my-fact ?my-fact-id 2 ?new-value))
while executing defrule my-rule.
Message: Error during execution.
at java.lang.Throwable.init(Throwable.java:84)
at java.lang.Exception.init(Exception.java:35)
at jess.JessException.init(JessException.java:53)
at jess.Funcall.execute(Funcall.java:254)
at jess.Defrule.fire(Defrule.java:205)
at jess.Activation.fire(Activation.java:65)
at jess.Agenda.run(Agenda.java:126)
at jess.Agenda.run(Agenda.java:102)
at jess.Rete.run(Rete.java:752)
at com.Motor.treatMyStuff(Moteur.java:340)
at java.lang.reflect.Method.invoke(Native Method)
at
sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:242)
at sun.rmi.transport.Transport$1.run(Transport.java:155)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:152)
at
sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:462)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:6
62)
at java.lang.Thread.run(Thread.java:498)
updateDB-my-fact is a Java function, which work perfectly well if I call
it
outside the then or else part. A workaround I found is something like :
...
(if (= ?new-value ?max)
then
(modify ?my-fact (state 4) (value ?new-value))
(bind ?new-state 4)
else
(modify ?my-fact (state 2) (value ?new-value))
(bind ?new-state 2)
)
(updateDB-my-fact ?my-fact-id ?new-state ?new-value)
...
which works well.
Emmanuel L_charny, IKTEK
06 08 33 32 61, www.iktek.com
-
Ernest Friedman-Hill
Distributed Systems ResearchPhone: (925) 294-2154
Sandia National LabsFAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969
RE: JESS: Error while creating new Rete() object from a servlet
Hi, I think that addind c:\jess in your classpath will help (if of course Jess has been installed on c:\). Emmanuel Lecharny, IKTEK 06 08 33 32 61, www.iktek.com http://www.iktek.com -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la part de Mona Marathe Envoye : jeudi 26 avril 2001 08:38 A : [EMAIL PROTECTED] Objet : JESS: Error while creating new Rete() object from a servlet Hello! We are new to using Jess. We have been trying to create a GUI for a Jess-based application using a servlet. The Jess-based application is written in Java and imports the Jess classes. For initial testing we had written a main() function and tested it out simply. While integrating the class (which creates a new Rete() object) with a servlet we got an initial error at the stage Rete a = new Rete(); Tracing through the error we discovered that the Batch function cannot find the file LIBRARY_NAME = jess/scriptlib.clp. The file is very much there. The problem is that the environment cannot figure out the right path. Obviously some Jess-specific environment variable needs to be set. Could anyone tell us what it is? Thank you - 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] -
RE: JESS: Re: Using definstance.
Hi,
didn't you forgot the defclass before the definstance? (8.38 in the doc :
"Creates a "shodow fact" representing the given Java objetc, according to
the named deftemplate (which SHOULD have come from defclass)"
Emmanuel Lecharny, IKTEK
06 08 33 32 61, www.iktek.com http://www.iktek.com
-Message d'origine-
De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De
la part de chinnaswamy gounder
Envoye : jeudi 12 avril 2001 11:43
A : [EMAIL PROTECTED]
Cc : [EMAIL PROTECTED]
Objet : Re: JESS: Re: Using definstance.
Hi Ernest,
I tried with the simple coding in order to use the
deinstance() method of the Rete class in Jess 6.0a5;
but resulting with errors. Results and the coding
are:
Results:
It is dynamic
Class Name = A1obj
xxx
0
1000.0
Jess reported an error in routine
DefinstanceList.definstance.
Message: Unknown object class A1obj.
at
jess.DefinstanceList.definstance(DefinstanceList.java:149)
at jess.Rete.definstance(Rete.java:890)
at SampleDefinstance.main(SampleDefinstance.java:26)
Exception in thread "main" Process Exit...
Coding:
import jess.Rete;
import jess.Value;
import jess.JessException;
import jess.ReflectFunctions;
public class A1obj
{
public int kount;
public double salary;
public String name;
A1obj()
{
kount =0;
salary = 1000;
name = "xxx";
}
}
public class SampleDefinstance
{
public static void main( String[] arg) throws
JessException
{
boolean dynamic = true;
Rete rr = new Rete();
A1obj a1 = new A1obj();
String className = a1.getClass().getName();
if( dynamic )
System.out.println( "It is dynamic");
System.out.println( "Class Name = " + className );
System.out.println( a1.name + "\n"+a1.kount + "\n" +
a1.salary );
Value vv = rr.definstance(className,a1,dynamic);
}
}
Seeking advice on the above problem
Thanks and regards.
Chinnaswamy
--- [EMAIL PROTECTED] wrote:
1) Section 4.6 in the Jess 6.x manual shows how to
use a Funcall object
to call definstance directly from Java.
2) Starting with Jess 6.0a5, the Rete class has a
definstance()
function you can simply call as
Rete r = ...
r.definstance(tag, object, true|false);
3) You can call definstance from Jess code, and
instead of pushing the
Java objects in from Java code, you can pull them in
from Jess; for
instance, provide a Java method for Jess to call
which lists all the
objects to be definstanced in a multifield.
There are surely other ways to do it, too.
I think chinnaswamy gounder wrote:
Hi All,
I have some 'objects' in java code and I
want
to put them into the knowledge base using
definstance
Jess script function.
( definstaance tag Java Object
static|dynamic ).
One way is tranferring the objects from java to
jess
by using store and fetch functions and then use
the
definstance function.
Is there anyother means to chieve this java object
transfer to jess.
Advance thanks for your advice
Chinnaswamy
-
Ernest Friedman-Hill
Distributed Systems ResearchPhone: (925)
294-2154
Sandia National LabsFAX: (925)
294-2234
Org. 8920, MS 9012
[EMAIL PROTECTED]
PO Box 969
http://herzberg.ca.sandia.gov
Livermore, CA 94550
-
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]
-
__
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail.
http://personal.mail.yahoo.com/
-
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]
-
RE: JESS: User contributed software
Easy : just go to http://herzberg.ca.sandia.gov/jess/user.html, click on JessWin GUI to download it. You'll need a few steps, compiling it and launching it, but it's just a 5 minutes job, and it works perfectly well !!! Emmanuel Lecharny, IKTEK 06 08 33 32 61, www.iktek.com http://www.iktek.com -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la part de Matt Bishop Envoye : mardi 27 mars 2001 20:01 A : Jess Mailing List; 'Bill Wheeler' Objet : RE: JESS: User contributed software ...so where does one look at JessWin? A url somewhere? I am very interested in having a look. __ Matt Bishop - Engineering Manager, UpFront "The great thing about standards is that there are so many to choose from." -- From: Bill Wheeler Reply To: Bill Wheeler Sent: Tuesday, March 27, 2001 9:09 AM To: '[EMAIL PROTECTED]'; Jess Mailing List Subject: RE: JESS: User contributed software Thanks Ernest! Shameless plug for my JessWin JessIDE: a close approximation to the ClipsWIN program from the Clips website. Allows the tracking of facts, rules and the agenda. Also has an editor. Requires Jess60a5. Enjoy! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 27, 2001 9:19 AM To: Jess Mailing List Subject: JESS: User contributed software Just a quick note to say that I've posted three new entries on the "User Contributions" page at the Jess web site: David Li's Ant build file, Lawrence Leff's Jess/XML integration, and William Wheeler's JessWin Jess IDE. http://herzberg.ca.sandia.gov/jess/user.html . - Ernest Friedman-Hill Distributed Systems ResearchPhone: (925) 294-2154 Sandia National LabsFAX: (925) 294-2234 Org. 8920, MS 9012 [EMAIL PROTECTED] PO Box 969 http://herzberg.ca.sandia.gov Livermore, CA 94550 - 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] - - 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: Persistent facts
It could be very usefull, specially if you are using a very big number of facts - that's my problem, actually (30 000 facts and more). The 'special template' stuff, (cf Burke message) could be a good approach, but that drives to something like overloading every access method of the Fact class in the engine (from getSlotValue to getStaticSlotValue). Otherwise, extending Fact class from something else than ValueVector (a database access class) is another way. The big issue is how to manage new facts: you have to be 'signaled' by the databse when a new facts has been inserted - or modified -. Considering you are instanciating an engine to work on a set of facts, may be that's not a problem for you, but it's a static approach to this problem. The database is just another way to store these facts without experiencing memory boudary problems (java -mx1024M -ms1024M jess/Main is not always a solution :)) Another boring point is the way the engine is working : Rules are activated by Facts, and with a very big database, it could be very time -and memory - consuming (you browse the whole database to activate each eligible rule, which mean that you store this information ( rules (R1, R2, ... Rm) have been activated by fact (f1, f2, ..., fn)) in memory. very very costly :( The more you have facts, the more it costs. Anyway, I buy the Idea. Emmanuel Lécharny tel : 01 71 00 68 00 www.imediation.com - 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] -
