citation tracking, Jess rule language, & export to sourceforge
by David Pautler
I'm evaluating Drools and other RMSs, looking for one that provides the
following features:
1) Citation tracking. I need to note what articles or scenarios
motivated a rule, and be able to provide a short description of how the
rule supports each. This goes beyond commenting because I need to have
access to a list of all articles and scenarios used and be able to jump
to the rules that hang from them.
2) Jess rule language. Our team has a symbolic AI background, and
Drools' language is non-intuitive to us. It appears that Drools is built
on Jess, and Jess' language would work much better for us. Is there a
way to use Jess' language, including intellisense support?
3) Export to sourceforge. Our deployments involve exporting the rulebase
and associated citation tracking to sourceforge or google code. That is,
we want to deploy text rather than binaries. Is there a better way to do
this than a simple db export?
I've checked the user manuals and list archives for each of these
questions but wasn't able to answer them for myself.
David
18 years
Drools BRMS Secrity Features
by Vikrant Yagnick
Hi All,
I have a question on using the BRMS which I am unable to find any answers on the internet.
Does the JBOSS Rules BRMS have any security features in terms of "Role Based Access". For example, is there a way out of the box to specify that user-A can access only these rules (or categories or packages ) and User-B can access this bit only.
It need not be too sophisticated.
If it is not available at a Rules Level , can it be implemented at a JSP level. That is put in Sever specific URL Filters to not allow access to certain pages(if a page can correspond to a rule)?
Any, help in this regard will be a tremendous help for me to make some design decisions regarding the BRMS.
Cheers,
Vikrant
MASTEK LTD.
Mastek in NASSCOM's 'India Top 20' Software Service Exporters List.
In the US, we're called MAJESCOMASTEK
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18 years
Checking facts between them
by Delaunay Gaetan
Hi all,
I was wondering if it was possible to create a rule which checks if a
fact is equal to another one. For example in my case i'd like to compare
the date of fact with the date of fact +1. I hope you understand what i
mean.
What kind of rule will be suitable to do that?
Thanks
Gaetan
18 years
effective dates at package level
by hongyu lu
Is it possible to specify effective dates at package level instead of per rule based?
We would like to organize rules by package and manage at that
level. e.g., enable/disable all rules of a particular package as a
whole.
I tried to mimic it with package global variable, but it
doesn't look like you can assign a value to a global variable at
declaration?
thanks
Jeff
18 years
How to kill drools?
by Руслан Сорокин
Hello rule-users,
How to kill drools? WorkingMemory.dispose() is not working - Drools
working all the same :(
Sincerely,
Ruslan Sorokin
sorokin(a)oogis.ru
18 years
wrapping drools api?
by thomaskukofka＠web.de
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 make sense if I'm thinking about changing the rule
engine one day?
If I'm not intending to change the rule engine from Drools to another,
so isn't it the same if the developpers has to use the native Drools API
or an self-written access API?
Regards
Tom
18 years
firing rules without modifying activations
by Fermion
Hi,
I'm doing an expert system for a highly complex high energy physics detector
(CERN->ATLAS->Pixel Detector->Detector Control System).
In principle the detector is a complex machine with a rather hierarchical
structure.
The idea is to use a Drools based expert system to inform the operator of
the Detector about what to do in case of a problem. The system itself is
controlled by something that we call a "Finite State Machine" which is
reducing the complex operation of the detector to a number of simple
button-actions.
As the Finite State Machine does not suggest, what to do, if something goes
wrong, the expert system should do that.
In order to do so, the expert system shall display "solution advices" to the
Detector operator. As there can be many unrelated problems at the same time,
we use a tree-structure to show, where in the Detector the problem happened.
If a rule gets activated by a fact (in my case a process parameter of the
detector, e.g. a temperature), the corresponding node in the tree is being
highlighted by a dedicated icon. Once the facts change and the activation is
cancelled, we remove the highlighting icon, so that the tree only shows the
current activations (we don't need logging here, as this is done elsewhere).
This works absolutely fine for us, BUT:
We can't FIRE the activations, as this would immediately remove them from
the agenda, which in turn would remove them from our tree => no operator
would see them.
At first I thought, that NOT-FIRING those activations wouldn't hurt, as we
just wrote the "solution" on the RHS of the rule and parsed this RHS by
ourselves. This way, we displayed the solution belonging to a given
activation as long as it was still on the agenda.
You can see, that the main problem of this is that one CANNOT do things
like:
PrintSolution("Reason for problem is a over-temperature of: " + $temp + "°C
on Module: " + $moduleName);
In our case we could still parse the code, but would be unable to access the
local variables $temp and $moduleName (example) without actually firing the
rule.
Firing the rule on the other hand would cancel it's activation, rendering
our display tree useless.
I think the thing that would be most usefull for us would be a way to fire a
rule "silently", without notifying the agenda about it (so that the
activation would NOT be removed).
I'm not sure whether I was able to explain the problem sufficiently, but
maybe someone has an idea how to handle the situation.
Thanks very much!
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18 years
Problem with RuleFlow: Split
by Sangrish
Hi all,
I have a condition on an attribute of a few inserted objects(all of
same type) in the Split node of a ruleflow. During rule execution phase I
see that the condition holds true for all the inserted objects even when the
attribute has different values in different objects.
I mined the mailing list for it and found that this was a known problem
in July 2007 and workarounds were suggested for it. Is this problem still
there? I am using Drools 4.0.7
The condition looks like: Author( attribute == -1 )
and it holds for all objects if at least one of them has the attribute set
to -1. If none of them is -1 only then
the condition is not satisfied.
A solution I can think of is to insert objects one by one and fire all rules
after every insertion and retract object every time you fire. Will it be
inefficient? I can potentially have 10s of thousand of such objects.
Thanks
Siddharth
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18 years
