Drools Planner - split and join parallelism
by Willem van Asperen
Hi All,
I have an idea that I would like to bounce of the list.
As far as I understand, Drools Planner does not do any parallel
searching. It uses a single solver thread that does all the work.
What if I would forage not only the best solution so far, but a couple
of "promising" solutions and split these off to run on a separate
thread. I would split these itteratively down to a given level of iteration.
When these threads return I would then pick the best solution from the
returned values.
Using a multi-core box or even a server farm I could massively increase
the searched problem space and do it without loosing too much time (some
parallel management overhead).
Has anyone thought of such scheme before? Any luck in implementing?
Do you see any flaws?
Just a thought.
Regards,
Willem
13 years
Rules with variable timers
by Shannon Hastings
Is there a way to write a rule in DRL that uses a timer or something that is dynamic. I.E. I want the time that rule waits to fire to be dependent on a variable such as below:
rule "CheckDoseMissed"
no-loop
timer(int: $eventA.sleepTime)
when
$eventA : MyEvent()
………..
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Shannon Hastings
Inventrio
shannon.hastings(a)inventrio.com
(614) 389-2795 ext: 101
http://www.inventrio.com
13 years
help with designing / implementing a way for users to write their own rules
by kurrent93
Dear drools experts
Can I get some ideas on how best to do the following.
I would like users of my app to be able to write their own rule(s). For
example, if Joe User buys an item that is more that $200 then he uses XYZ
shipping. If he does not select shipping the he uses ABC shipping.
More precisely, how can I offer the ability, using Guvnor, for the end user
to write a rule, that does not give him the ability to modify a rule
condition regaring user id. The example above, of coures, has a condition
that if user is 'Joe User'.
There are very many places in the app where users should be able to write
rules, so it would be nice to use (embed) guvnor, rather than writing a
special UI for each situation.
Any suggestions welcome.
Br
Anton
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View this message in context: http://drools.46999.n3.nabble.com/help-with-designing-implementing-a-way-...
Sent from the Drools: User forum mailing list archive at Nabble.com.
13 years
6.0 Alpha - Annotation Driven development with Multi Version Loading
by Mark Proctor
http://blog.athico.com/2012/12/60-alpha-annotation-driven-development.html
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Drools & jBPM 6.0 alpha should be out end of next week. 6.0 introduces convention based projects that remove the need for boiler plate code - literally just drop in the drl or bpmn2 and get going. Further we now allow rules and processes to be published as maven artifacts, in maven repositories. These artifacts can either be resolve via the classpath or downloaded dynamically on the fly. We even support out of the box side by side version loading, via the maven ReleaseId conventions.
As a little taster here is a new screenshot showing the annotation driven development. The lines below are all that's needed to dynamically load a module from a local or remote maven repository and start working with it. KieSession is the new, shorter name, for StatefulKnowlegeSession. Kie is an acronym for "Knowledge Is Everything", but I'll talk about Kie in another blog, expect to start hearing a lot about it soon :)
And here is a complete example screen shot. Create the drl, define the kmodule and start using them.
(click image to enlarge)
13 years
