ok thanks, i think i confused my notion of eval() with also its ability to
return int on calculations in some other framework.
The reason why i started this thread was to ensure in the process of Rule
engineering, I could write optimal rules in mathematical notion and not have
to worry about techn
I believe eval() solves that purpose functionally but is not optimal; not
sure how evals() tie in with Rete-OO
Specially since the return type of eval() is not known, I can seriously
doubt it being optimal as using Objects directly in conditions.
-
Software documentation is like sex: If its go
According to First order Logic, (from a rule perspective), one can represent
their statements using:
PREDICATES, METHODS, CONNECTORS (including existential quantifiers)
..while PREDICATES can be synonymous with Object and Object expressions; the
only way of using methods has been via "eval" (AFAI
Hi,
though it is clear Rule Engine (lke Drools) supports Declarative
programming and First order Logic or FOL (with existential quantifiers and
works) am also looking for Probabilistic Reasoning.
Example:
Fact: A U B => C; this fact exists with a probability of 0.9.
Principles namely being:
ok?! Should i file a JIRA?
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_
Hi,
I was trying out the new stable version of Drools and on faulty DRL files I
was getting:
Exception in thread "main" java.lang.ArrayStoreException
at java.lang.System.arraycopy(Native Method)
at java.util.ArrayList.toArray(ArrayList.java:306)
at org.drools.compiler.PackageBuilder.
Hey,
I think I saw Apache-Forrest being used in your docs earlier sometime. Now when
I look at the POM I see DOC Book plugin.
The Drools documentation is 'pretty' (thanks); just wanted to know if you guys
employ forrest. And Are you using the two together or your doing away with one
(and whats th
Hi,
I have many rules. These rules may or may not belong to the same set. However,
based on their name they can be grouped. Say all rules starting with
"Traffic_Rule", "Criminal_Rule" etc.
Q1. I want to check after assertion of a fact (A.) how many and (B.) which all
rules executed for "Traffic_R
Hey,
any answers? Though my questions were logical and simple for guys who would
know :)
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I dont see any mention of the rules themselves in this thread.
Check if you are using a lot of "evals" and also you may be using the same
object in all your rules; so the theoretical ReteOO performance goes for a toss
coz it does branch the tree based on object type.
If the above is what your rul
Hi,
I have many rules. These rules may or may not belong to the same set. However,
based on their name they can be grouped. Say all rules starting with
"Traffic_Rule", "Criminal_Rule" etc.
Q1. I want to check after assertion of a fact (A.) how many and (B.) which all
rules executed for "Traffic_R
Mark Proctor codehaus.org> writes:
>
> thomaskukofka web.de wrote:
> > Hello,
> >
> > some people write about wrapping the Drools API with an own access API
> > for integration in the application.
> > Sorry for the perhaps stupid question, but what is the reason for
> > this? Does this only m
>
> Don't forget the free Drools job board. Where the jobs are also listed
> on the blog.
> http://jobs.athico.com/
Hi Mark,
thats what I had forgotten :o) Thanks for the link!
Mark Proctor codehaus.org> writes:
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rule
Hey guys,
I reference of mine is interested in hiring a JBoss Rules resource for a new
venture. To ensure the person is good I'm not throwing this to the general
public; is it possible to contact you guys?
lemme know.
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ru
> > evals by reusing their output?
> >
> no
> > Another question is, is tehre something wrong in the above definition from
a
> > declarative programming point of view?
> >
> its not idea - but sometimes over use of eval can't be helped - only you
> know the answer to that, being your doma
Hi,
I've learned the use of eval() is not efficient, but it cannot be avoided in
many cases.
However, using temporary variables I tried:
when
$tmp: eval(...)
($tmp == false) or (eval(...))
Then
...
end
The above doers not compile; is there an alternative to reduce the number of
evals by r
Hi I have a BusinessObject with a field called "exists".
I think the rule engine interprets this in some special way.
Is there a way I can emphasize its a variable and not a syntax word?
Thanks,
Arjun
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Whats the difference between:
when
Then
...
End
Vs
when
and
Then
...
End
..Assumping I have no need to use variables between A & B, do I get a
performance improvement using "AND" or does the Rete evaluate faster if the sub-
conditions are stated independently?
Thanks in advance
Mikael Larsson redpill.se> writes:
>
> Hi!
>
> Just the answer I was hoping for, thanks for the fast reply!
Hmmm, I just wished the answer was also "Well, if you have pooled them
there is no harm" :o)
This is something that I've been concerned with from a long time.
I do pool sessions a
Mark Proctor codehaus.org> writes:
>
>
Awsome! This was the exact level of detail I was looking for. Thank you soo
much. I've been troubled abouth this for some time, and did not have time to
dig through.
but really appreciate it, cant tell you how thankful I am.
Thanks,
Arjun
_
> You cannot insert data over time into a stateless session, all data is
> added at the same time. When the engine has finished processing it w ill
> return and is finished, at this point as soon as the stateless session
> is available for garbage collection the objects will be removed. There
>
Hi,
can someone please explain; if a stateless session is used over a log period
of time. How are the objects (rather the shadows to them) released?
I understand that as long as a class is not final, its shadow is created and
used. This raises a concern about the life cycle of that object.
per
Steven Williams gmail.com> writes:
>
>
> I added agenda-group to decision tables in September 2006.cheersSteve
2006, or 2007? Because it was not there in JBoss Rules 4.0.0 (at least not
documented).
Either way, it means it exists now. So will look at the latest release
documentation.
Than
Hi,
I have the following scenario.
SCENARIO (simplified for discussion from actual blown up scenario)
-
1. A decision table (DT) with rules for "all types of employees" - Call
it "Common DT"
2. The DT mentioned in Point 1 has a condition that fetched data depending
on "Type Of Employe
Mark Proctor codehaus.org> writes:
>
>
> Knapp, Barry wrote:
>
> That generic attribute would sure be a nice place to put effective and
> expiration dates.
> Really looking forward to the patch :)
Ok, so whose writing the patch?
Can we have a spec of whats exactly needed?!
I've been wiati
Hi,
something I must have missed is "Sequential Execution Flow". Is this simply
putting a salience in order from top to down for rules or someting else
how do I use this "Sequential Execution Flow" (If it is not what I think it
is), how is it faster and consume lesser memory?
Thanks
___
Arjun Dhar yahoo.com> writes:
>
> Hi,
> This problem needs to be solved conceptually before technically.
> Assuming (I can't use Agenda Groups in decision tables).
>
> SUMMARY
> ---
> Some rules evaluate some logic and pass it to a rule which aggregates
Test case:
Write a Rule that uses a From clause and on another object does not use a from
clause:
example:
#From row number: 28
rule "Rules_28"
when
cntct: Contact(initialized==true)
config: BooleanConfiguration(value==true) from
meta.getConfigura
Hi,
This problem needs to be solved conceptually before technically.
Assuming (I can't use Agenda Groups in decision tables).
SUMMARY
---
Some rules evaluate some logic and pass it to a rule which aggregates the logic
to give the final outcome. Now that requires use of update. (or insert)
B
I have a rule:
SOLUTION 1
===
when
cntct: Contact(initialized==true)
rel: Relation(contact==cntct, active:active == $1)
then
…
end
For this to run, it requires the "Relation" object asserted into working memory;
so I'd have to forcefully assert (Relation
> Should we go to Jira to find what are the open issues?
>
> I have been fighthing one issue where drools doesnt seem to be
> evaluating all the constraints. I have two columns with the same class
> on both and around 8-9 joined constraints. Constraints 5+ are never
> evaluated (at least my class
Hi,
in a load intensive operation, if a pool of JDBC connections is exausted
the 'from' breaks. Ok, it should! (Not expecting magic :o) ) ,.. but I'm
concerned about the trace it generates.
The stack trace does not suggest the ground reality and is very abstract. Can
you have an enhacement to
Hi Mark,
based on previous post I decided to write my own implementation of
COnflictResolver and set that into RuleBaseConfiguration. All very well,
but how do I hook it up to my rule base?? I cant find methods to connect the
two. ..someone help, we're all gonna die ..kidding :o)
Appreciate yo
Mark Proctor codehaus.org> writes:
>
>
> I just looked at the decision-table implementation. The sequential
> option there is different from rulebase sequential mode, my mistake
> sorry. sequential the option just sets a salience value on each row,
> based on row number. So I see no reason why
they all have getInstance(), except
> Composite, so it should be fine.
Hi Mark,
I appreciate the tip regarding writing cutom ConflictResolvers, I needed that
as a develper who cant keep his nose out of the core code.
But right now as an end user I have a problem. I opened my mouth about rules o
Hi,
I usually use decision tables without sequence. But there was a request Not to
use priority and if there was a conflict then the rule on top should get
priority.
I thought, sequence = true was a good way of ensuring that. But in the rules I
call update(); this forces all the rules to fire
Hi,
on the user forum, a post was sent to update from
http://labs.jboss.com/drools/downloads. (JAR Last updated 24th Jul 07)
I also took an update from:
http://repository.jboss.com/maven2/org/drools/ (JAR Last updated 31st Jul 07)
...or should I just simply take the latest build from maven ???
>
> I feel using Drools would increase the
> development time a lot.Also from a maintenance
> perspective it might consume lots of effort.
>
> Can anyone advice me what to use? also please let
> me know the PRO's and Cons if any?
>
I think your main concern is mentioned in the last lines not t
Hi Mark 2 different questions below:
BTW how do you implement sequential loading mode? is it there in the
documentation? please let me know even I'd like to experiment.
Also, I keep multiple sessions in memory loaded, A request sends Fact against a
session name; and that the execute for that sess
Thanks,
you really spiced up the documentation :o) Thats really great.
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> Q1) So would either or both "not contains" or "not in" work?
> Q2) Or is "not contains" only for List or Collection type? what about
HashMaps
> then?
> Q3) Stretching my actual use case to its limits; if I want to write
conditions
> over objects that were never asserted into the working memo
comcast.net> writes:
>
> My rule now appears to be working after switching from the "excludes"
operator to the newer "not contains".
>
> This works:
> $ca:CandidateAssociation(nurseDetails.stateLicensures not contains
patientDetails.state )
>
> This does not:
> $c
Hi,
In "stateless" Session:
If List of A1,B1,C1 are executed - execute(List)
and at the same time in a paralell thread A2,B2,C2 are executed - execute(List)
In "Theory" (Conceptually), I want to confirm if A1 will interfere with the
rule using A2? Just want to ensure what is appropriate or expe
Thanks, I logged it in JIRA: http://jira.jboss.com/jira/browse/JBRULES-1047
Your suggestions were helpful
Thanks again!
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FYI
Let $1 = true
and the object Contact is declared 'final'
thanks,
Arjun
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When I define a rule:
When
cntct:Contact (initialized==true)
exr:Relation( contact==cntct,
active:active==$1,
relationName=="Old")
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
..The bove works.
Hi,
I have an Object 'Configuration'
public class BooleanConfiguration {
String paramName;
Boolean value;
Client client;
}
I asserted this object and the rule was not executing as I expected.
I put a break point in the object, and found that it set it correctly but
whenenver the rule eng
Hi,
one doubt I've had while writing DRL scripts and also with others is:
A {
B b
C c
D d
};
If The rules are to be Written over A, B, C
Then should one assert B, C & D also? ---> Answer yes!
Ok, now that we've asserted them, in the Rule if one uses:
A.b; does the Rete graph recognize it as
Hi,
Q1. we all use POJOS in the Working Memory. Theoretically is it even possoble
to experiment with distributed objects in the working memory running in a JVM?
At the end its an object, but well... :)
Q2. Another question, with DSL, Decsion Tables, Rule Flows. Where does the
JBoss Rules dev t
bergstein-soraic.de> writes:
>
>
> I've a use case that is similar to the TroubleTicketExample that is part of
the drools examples.
> In this examples new tickets are inserted via workingMemory.assertObject
(ticket). However, tickets are usually managed and stored in a ticketing system
(Re
CONGRATULATIONS :o) And BIG Thanks guys! Brilliant Job.
Hope we can contribute better to your release. If nothing else atelast the
documentation.
Actually, have discovered a lot of things and notes and am wondering how to
share it back.
Example, writing multi table decision tables, rule sequen
> Just info, I ran a test on about a million requests (loop) and 50 threads.
> approx 6 business Obectts and 15 rules. I did get any concurrent modfication
> issues on JBoss Rules 4. Can you please post the rule scripts/DRL used
>
> regards,
> Arjun
>
Sorry Typo. I was saying is I "did not" g
dpark exchangesolutions.com> writes:
>
>
> I'm in the process of upgrading our decision table rules from 2.1 to 3.0.
> However I've run into a bit of a snag that I hope someone can help me with.
>
> We have a generalized consolidation rule that:
> * takes 2 parameters of the same Object Type
> I need to do two things:
> 1. Support sequencing of rule groups
> 2. allow two modes: a. Execute all rules, b. Break on first rule
..ok, let me go one level further, ...even if the decision table does not
support it; I want to dynamically invoke it. This is what I really want.
I.e. If the swi
Edson Tirelli post.com> writes:
>
>
> Can you please provide details or better yet a self contained example that
shows the problem. []s Edson
> 2007/7/23, McShiv <
> rajesh_sachin10 yahoo.co.in>:
> Hi, I am getting the following error when I try to run the rules in
> bulk(EG: 5 or
Hi,
I reported this earlier also, I cant understand why do we not provide AGENDA-
Group support for Decision tables, while we do provide Activation?
See DefaultRuleSheetListener.
I need to do two things:
1. Support sequencing of rule groups
2. allow two modes: a. Execute all rules, b. Break on f
Michael Neale gmail.com> writes:
>
>
> Hi Arjun - I wouldn't recommend re-using session unless there is some
expensive state you wish to reuse. Pooling them will use up far more resources
then freeing them. You should only pool expensive to obtain resources.
Hi Michael,
thanks a lot for yo
Hi,
I took the latest Snapshots from the trunk, to check if the memory leak
problem was fixed, but in compiling the rules i got:
The method modify(MyBusinessObject) is undefined for the type Rule_xxx
Have you removed "modify()"? so By default modify will be invoked without
having to explicitly
> Stateless sessions should not hold onto any references. Stateful do,
> and dispose() must be called when its finished - otherwise the rulebase
> holds a reference forever. If the rulebase is holding onto stateless
> sessions, then that is a bug.
> Mark
>
Thanks a lot Mark,
taking the latest bi
> QUESTION:: Is the session maintaining references to those objects ever after
> executing them? Why are the objects not being released?
>
> Specially I'd imagine for a STATELESS session (which is what I've set as
> default).
>
> Using JMeter this system crashes every time under load, even wit
Hi,
I've been building a BRMS server over the Drools 4MR2 API.
The Server has a Boot process to allow to make it become a Rule server(s).
reads and XML configuration in which a user can specify the location of the
DRL, XLS, CVS, etc. During the Boot proocess it verifies thew authenticity of
ea
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
(p
Michael Neale gmail.com> writes:
>
>
> Yes, as discussed, you need to add import statements for the types you want
the BRMS to be aware of - if you like, create a feature request jira for auto
importing. I deliberately didn't do it cause I thought it would cause more
confusion, but perhaps I
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