11:52 a.m.
I read with interest how Drools 5 Fusion is able to compute when facts
can not longer activate anything, and garbage collects them. Very
clever and elegant! I am contemplating long-lived stateful working
memories in a Drools 4 application.
I assume that if I modify a fact, a new copy replaces the old copy,
and the old copy should be subject to Java garbage collection. No net
memory leak.
If I add a new fact, use it, am now done with it, neither Drools nor
Java knows it is collectible. If I have a rule like "When A and B...", I
may know the B event is completely dead, but Drools can't know if a new
A will arrive and use the B event in the activation.
What is the state of the practice for managing working memory for Drools
Expert applications?
* Do people write rules to manually delete facts when they are no longer
needed?
* Is Drools smarter than I know, and is able to do the garbage
collection of facts for itself?
* I gather one common option is to limit the lifetime of the session, to
do the nuclear garbage collection by killing the session and starting a
new one. That could be a lot of hassle here, there are no good stopping
points. I'd have to figure out what events need to be transferred over
into the new session.
Various people obviously run very large Drools apps but I have not seen
much discussion of this issue. I am hoping there is something obvious I
am missing, so I don't have to write an application-level fact collector
myself.
thanks, Allan
10:37 a.m.
New subject: Drools Boot Camp Co-Located with ORF 2009
[With Permission...]
Good News! Drools Boot Camp will be co-located with October Rules
Fest! Now you can have your cake and eat it too! Mark Proctor and
Edson Tirelli are already featured speakers at ORF 2009 but now they
will have a Drools Boot Camp at that same place and it's free for ORF
2009 Attendees. (If that's all that you want from ORF then there is a
small charge to help pay for the room, coffee, etc.)
We're re-designing the ORF 2009 Agenda right now to accommodate a
Thursday Think Tank (T3) that is a round table discussion by the
industry's leaders. People such as Mark Proctor, Dr. Forgy, Gary
Riley, Carlos Seranno-Morales and others. The T3 will set the
direction of rulebased / BRMS development for the next decade and the
ORF 2009 Attendees will be there to listen and contribute.
So, with DBC co-located with ORF 2009 - AND - the T3 this should prove
to be an explosive combination of events that, while not on a par with
the Big Bang, certainly will be one of the most exciting events of
this decade. Well, for rulebase geeks, anyway. :-)
Check out http://www.OctoberRulesFest.org for more details. (DBC
probably won't show up until Monday or Tuesday)
SDG
James Owen
Founder October Rules Fest
Senior Consultant / Architect KBSC
http://www.kbsc.com
http://www.OctoberRulesFest.org
Twitter: OctRulesFest
Blogs:
http://JavaRules.blogspot.com [Rulebased Systems Blog]
http://ORF2009.blogspot.com [October Rules Fest Blog]
http://exscg.blogspot.com/ [Expert Systems Consulting Group Blog]
"If I have seen a little further it is by standing on the shoulders of
giants."
Sir Isaac Newton in a letter to Robert Hooke, 5 Feb 1676
Come to October Rules Fest and stand on the shoulders of the Giants of
the industry; if only for a week.
9:22 a.m.
New subject: Fwd: Drools Boot Camp Co-Located with ORF 2009
All,
I will write a proper blog about it and distribute e-mails to the list,
but let me use the opportunity to reinforce the invitation. October Rules
Fest is "THE" technical conference for those interested in Business Rules
technology and related fields. It is a no fluff conference. All sessions are
technically oriented with the goal of inform and as much as possible deep
dive on the technicalities of the field.
This conference has already confirmed (in the same way that it did last
year) the presence of the main brains behind the technology we use as
speakers and attendants. Check out the list:
http://www.octoberrulesfest.org/ and click on Speaker Bios. You have Charles
Forgy, Gary Riley and so many other great names in the field.
Drools team will be there with 4 presentations and now, hoping to repeat
the success of the last 2 bootcamps, we hope you plan your trip to arrive a
couple days earlier and join us for some deep technical diving on the drools
usecases, drools internals, and some coding fun.
See you there,
Edson
---------- Forwarded message ----------
From: James Owen <jco2009(a)att.net>
Date: 2009/9/13
Subject: [rules-users] Drools Boot Camp Co-Located with ORF 2009
To: Rules Users List <rules-users(a)lists.jboss.org>
[image: sm_headerlogo.jpg]
[With Permission...]
Good News! Drools Boot Camp will be co-located with October Rules Fest!
Now you can have your cake and eat it too! Mark Proctor and Edson Tirelli
are already featured speakers at ORF 2009 but now they will have a Drools
Boot Camp at that same place and it's free for ORF 2009 Attendees. (If
that's all that you want from ORF then there is a small charge to help pay
for the room, coffee, etc.)
We're re-designing the ORF 2009 Agenda right now to accommodate a Thursday
Think Tank (T3) that is a round table discussion by the industry's leaders.
People such as Mark Proctor, Dr. Forgy, Gary Riley, Carlos Seranno-Morales
and others. The T3 will set the direction of rulebased / BRMS development
for the next decade and the ORF 2009 Attendees will be there to listen and
contribute.
So, with DBC co-located with ORF 2009 - AND - the T3 this should prove to be
an explosive combination of events that, while not on a par with the Big
Bang, certainly will be one of the most exciting events of this decade.
Well, for rulebase geeks, anyway. :-)
Check out http://www.OctoberRulesFest.org for more details. (DBC probably
won't show up until Monday or Tuesday)
SDG
James Owen
Founder October Rules Fest
Senior Consultant / Architect KBSC
http://www.kbsc.com
http://www.OctoberRulesFest.org
Twitter: OctRulesFest
Blogs:
http://JavaRules.blogspot.com [Rulebased Systems Blog]
http://ORF2009.blogspot.com [October Rules Fest Blog]
http://exscg.blogspot.com/ [Expert Systems Consulting Group Blog]
*"If I have seen a little further it is by standing on the shoulders of
giants."*
*Sir Isaac Newton in a letter to Robert Hooke, 5 Feb 1676*
*
*
*Come to October Rules Fest and stand on the shoulders of the Giants of the
industry; if only for a week.*
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
10:06 a.m.
New subject: Drools Boot Camp Co-Located with ORF 2009
James,
Last week you sent me an email saying I had signed up for ORF, but
hadn't reserved a room at the Adolphus or reserved a room at the ORF
rate. I double checked my reservation and it indicates I have reserved a
room at The Apolphus under the ORF rate. Is there something else I need
to do to confirm my registration? I've included a screen shot of my
registration if that helps.
Thanks,
Dan
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of James Owen
Sent: Sunday, September 13, 2009 11:38 AM
To: Rules Users List
Subject: [rules-users] Drools Boot Camp Co-Located with ORF 2009
[With Permission...]
Good News! Drools Boot Camp will be co-located with October Rules Fest!
Now you can have your cake and eat it too! Mark Proctor and Edson
Tirelli are already featured speakers at ORF 2009 but now they will have
a Drools Boot Camp at that same place and it's free for ORF 2009
Attendees. (If that's all that you want from ORF then there is a small
charge to help pay for the room, coffee, etc.)
We're re-designing the ORF 2009 Agenda right now to accommodate a
Thursday Think Tank (T3) that is a round table discussion by the
industry's leaders. People such as Mark Proctor, Dr. Forgy, Gary Riley,
Carlos Seranno-Morales and others. The T3 will set the direction of
rulebased / BRMS development for the next decade and the ORF 2009
Attendees will be there to listen and contribute.
So, with DBC co-located with ORF 2009 - AND - the T3 this should prove
to be an explosive combination of events that, while not on a par with
the Big Bang, certainly will be one of the most exciting events of this
decade. Well, for rulebase geeks, anyway. :-)
Check out http://www.OctoberRulesFest.org for more details. (DBC
probably won't show up until Monday or Tuesday)
SDG
James Owen
Founder October Rules Fest
Senior Consultant / Architect KBSC
http://www.kbsc.com
http://www.OctoberRulesFest.org
Twitter: OctRulesFest
Blogs:
http://JavaRules.blogspot.com [Rulebased Systems Blog]
http://ORF2009.blogspot.com [October Rules Fest Blog]
http://exscg.blogspot.com/ [Expert Systems Consulting Group Blog]
"If I have seen a little further it is by standing on the shoulders of
giants."
Sir Isaac Newton in a letter to Robert Hooke, 5 Feb 1676
Come to October Rules Fest and stand on the shoulders of the Giants of
the industry; if only for a week.
6054
days inactive
6058
days old
3 comments
4 participants
participants (4)
-
Allan Terry -
Edson Tirelli -
James Owen -
Quinn, Dan