conways game of life
by Mark Proctor
For anyone looking for a good and complex example on how to write rules
properly, please look at Conways Game of Life in drools-examples, for
extra bonus points compare it to the old version in M1. You'll see
nearly all the logic is moved from java to the drl and we have removed
the need for nested objects by using objects relaitionally, which also
allows us to exploit cross products to drive the application.
Mark
8 months
JBoss Rules as a Daemon Service
by Arjun Dhar
Hi,
I uploaded the JBoss Rules 4 WAR; I saw the repository options but no admin
console to run a service. Maybe I'm missing something?!?!
Q) Being under the cover of the JBoss server am sure there must be some
fascility to run this as a daemon service 'out of the box'! Right?? <--
Important
(posted this 3 days ago but it got lost somwhere; prob deleted the approval
mail; FYI not being impatient :o) but its important so would like to know)
Thanks!
17 years, 2 months
Localization in DSL
by Shigeaki Wakizaka
Hello.
I'd like to use Japanese in DSL.
Is it possible?
Do you have a plan to do the localize-thing with DSL and
brand-new BRMS?
Thanks in advance
Shige
17 years, 2 months
Writing rules using java..
by Kolla, Sandeep
Hi Rahul,
Its not about storing the whole file into the database.
I would have a Table representing the parameteres required to construct
a rule.
For example.
Tables:
RuleSetTable:
Ruleset_id
Ruleset_name
RuleTable:
Rule_id
Rule_name
Rule_saliance
Rule_condition
Rule_consequence
Ruleset_id
Now while loading the rules the application basically should read from
the DB, and construct the rules, as everything required to construct the
rules is avaliable in the tables.
This requirement had come up because as the rules keep changing quite
frequently, we don't want to bring down the application to load a new
DRL file.
Hope you understood what I want to achieve.
Thanks much,
Sandeep.
17 years, 8 months
RE: Rules with Lookup Tables...
by Rahul Phadnis
Have you looked at
http://labs.jboss.com/portal/jbossrules/subversion.html
I think that page is not uptodate since at the bottom
it says "Trunk is unstable and may often not build. If
you wish to build form Subversion source the latest
tag is:
http://anonsvn.labs.jboss.com/labs/jbossrules/tags/3.0.3-GA/
"
Are n't we at 3.0.5 already?
-Rahul
--- jjdepaul(a)us.ibm.com wrote:
> Rahul -
>
> Where can I find Maven2 repository that has the
> nightly builds for Drools project?! I've looked
> around on a couple of well-known ones abut no luck
> finding anything above D3.0.5
>
> thanks,
> james
> >
> > The "from" CE (conditional expression) is not
> > available in the current released jboss rules
> version
> > (3.0.5) and you probably have to use the nightly
> build
> > to use it.
> >
> > -Rahul
> >
> >
>
>
17 years, 11 months
Agenda filter based on package name
by Hooman Mozaffari
It seems "Rule" class doesn't store its parent "Package" information and Rule.getPackage() always returns null.
I would like to create an AgendaFilter based on package name but there is no way to get the parent package of each rule.
Thanks,
Hooman
public class PackageNameAgendaFilter implements AgendaFilter {
private final String packageSuffix;
private final boolean accept;
public PackageNameAgendaFilter(String packageSuffix){
this(packageSuffix, true);
}
public PackageNameAgendaFilter(String packageSuffix, boolean accept){
this.packageSuffix = packageSuffix;
this.accept = accept;
}
public boolean accept(Activation activation) {
if(activation.getRule().getPackage().startsWith(packageSuffix))
return accept;
else
return false;
}
}
_________________________________________________________________
Discover the new Windows Vista
http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE
18 years, 7 months
JBoss Rules IDE Error on StringEvaluator
by Ronald R. DiFrango
Anyone ever seen this error in the IDE:
Severity and Description Path Resource Location Creation Time
Id
Operator '50' does not exist for StringEvaluator
RtvDecisionEngine/src/rules/com/circuitcity/rtvcrms/rules rtv.drl
Unknown 1179954317638 29080
And if so what do you do about it? My rules file is just under 1000 lines
[and growing] and shows no other errors.
18 years, 10 months
RE: [rules-users] Using rules with database scenario
by Uday Kamath
We had similar use case. What we do is we model the Schema elements,
generate Java Beans (pojo), and write rules using these Pojo. Now we
have written a Service on top which takes Hibernate QL and gets the
database records as the same Pojos that Rules are defined on and fire
the Rules. Thus the service is generic and can be changed to take any
Query. The Rules can me modified and changed anytime and redeployed but
business objects in form of Pojos remain the same. Hope this helps
-Uday
________________________________
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Joe Chuby
Sent: Friday, March 09, 2007 3:53 AM
To: rules-users(a)lists.jboss.org
Subject: [rules-users] Using rules with database scenario
Hi all,
First time trying to learn JBoss Rules here. We have a pretty large
database (DBMS), we want to build some rules and retrieve data based on
the rules.
Could someone give a hint or an example of this usage scenario? I mean,
how can I use rules for database query, without writing my rules in SQL
directly? We are currently writing everything in HQL (Hibernate), but
the rules change every 3 months on average, so that's not a way to
maintain the system. Therefore, we want to extract that portion of the
business logic out of the code. The data structure does not change, but
the rules keep on changing.
I'm reading the user's guide, running thru the examples, writing some of
my own, but still no clue how to make it work with database.
If someone could give a sample, that would be greatly appreciated.
Thanks a lot.
________________________________
Bored stiff? <http://us.rd.yahoo.com/evt=49935/*http:/games.yahoo.com>
Loosen up...
Download and play hundreds of games for free
<http://us.rd.yahoo.com/evt=49935/*http:/games.yahoo.com> on Yahoo!
Games.
18 years, 10 months
BRMS import
by Shepherd, Michael
Hi,
Can I import an existing set of JBoss rules (Drools 3) into BRMS?
Thanks,
Mike
18 years, 10 months
ClassCastException caused by generated java code?!
by Krister Saleck
Hi,
thanks for the new features in 4.0MR3 - now i may get rid
of some of my workarounds :-)
Unfortunately one problem still pops up in MR3:
Some generated code causes a ClassCastException while casting to
a implementation class. Because JBossRules wraps Facts by a generated
class implementing the facts interface, there should only be some
casting to the interface class?!
---
caused by: java.lang.ClassCastException: de.myToys.CallContextImpl
at
de.myToys.konsum.core.account.rules.Rule_Buyer_neutral_0Eval0Invoker.eva
luate(
Rule_Buyer_neutral_0Eval0Invoker.java:12)
at
org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:71)
---
rule "Buyer neutral"
when
$c : CallContext(cause == "checkout", state == "new")
$order : Order()
(Quality(value == 1) or Quality(value == 2))
eval($order.getBuyer().isProspect())
then
$c.setState("neutral");
end
---
If I execute the rule without the "or" term i do not run into
that problem.... bad rule style?
Did anyone have a hint?
Thanks in advance,
Krister
18 years, 11 months
