I broke the build
by Mark Proctor
I broke the build, something in grid, but not sure why. will get onto it
first thing tomorrow.
M
13 years
Running Guvnor tests with Maven
by Michael Anstis
There's been a couple of times when people have had problems running
Guvnor's tests with maven following the move to Seam 3.
This is caused by an issue with Shrinkwrap that prevents the use of "mvn
test [-Dtest=ATestClassName]"
Until the Shrinkwrap issue is fixed Guvnor tests need to be ran with "mvn
integration-test [-Dtest=ATextClassName]"
The build-bootstrap\README.md has been updated to reflect this temporary
requirement.
With kind regards,
Mike
13 years
New module created: knowledge-internal-api
by Geoffrey De Smet
Hi guys,
At Mark's and Kris's request, I've created a new module
knowledge-internal-api in droolsjbpm-knowledge.
This module will - in time - contain all the internal API between
drools, jBPM and guvnor.
Advantages:
1) jBPM would no longer need to depend on drools-core.
2) It's clear that if you break backwards compatibility of the API in
that module, that drools version X won't work with jbpm version X + 1
(and vica versa).
Or put differently, if you change something in drools-core, you're safe
(now you are not).
--
With kind regards,
Geoffrey De Smet
13 years
friday release of 5.4 beta1
by Mark Proctor
On friday we'll be looking to start the 5.4 beta 1 release. Please make
sure everything you want is commited for then, and that you haven't
broken the buil and that you have updated the new and noteworthy.
Mark
13 years
Re: [rules-dev] [rules-users] Opportunistic Backward Chaining
by Mark Proctor
On 12/12/2011 21:39, Maciej Gowin wrote:
> I saw that there is an open issue for Opportunistic Backward Chaining:
> https://issues.jboss.org/browse/JBRULES-3272
>
> While I want to start working on this topic during my PhD thesis
> my question is if there is any work done on this?
> Is there any possibility to contribute in solving this issue?
> Of course I know that there is already Prolog Style Query Based
> Backward Chaining implemented.
Come onto irc to discuss:
http://www.jboss.org/drools/irc
As a quick summary drools supports unification and derivation queries,
that work in the same way that you would expect from a prolog system.
However in Drools those derivation trees can be fully materialised, like
a materialized view in a database. What this means is that as the
underlying ground terms change, the result set is updated to reflect
that. So a query becomes a live view over a derivation tree.
This materilized tree almost gives us OBC, because each query + argument
is materized on first request. The problem though is currently this
derivation tree is unique to the caller. What we need to do is make any
derivaition tree, query + arguments, available as a global cache. So
when we go to execute a query, we first see if anyone else has, and if
so we just re-use those results. If it doesn't exist in the global cache
we execute the query, which results in it being cached. This same
caching mechanism of query + arguments is used to stop infinite
recursion, which is a problem solved by the "tabling algorithm".
I'm very close to a nieve implementation that effectively uses a hashmap
as an ondemand cache of query results. The tabling algorithm actually
recommends a tree instead, claiming better performance. I'll try and
abstract the use of a hashmap so research in alternative "caching"
algorithms can be tried out, to see which gives better performance.
Further work can look into a heurstic cache to evict unused
query+argument results. When a query+arguments derivation tree is no
longer used, we don't want to make it available for GC straight away,
instead we should use some eviction queue that keeps around often
requested query+argument derivation trees, but evicting older and not
used often ones for GC. The heuristics would allow tuning of memory
utilisation too, to stop the cache consuming all the memory.
I believe Davide has more he'd like to see built on this, for out of the
box abductive reasoning. Btw this is probably more of a thread for the
dev mailing list :)
Mark
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
13 years
Drools & jBPM at ICAART (Portugal) 4th International Conference on Agents and Artificial Intelligence
by Mark Proctor
Please help spread the word :)
<http://4.bp.blogspot.com/-_b77C8kLxEk/TuDUJkn_TlI/AAAAAAAAAnY/_QPFAuMEdOo...>
Droosl & jBPM @ ICAART 2012 is now confirmed, and myself (Mark Proctor)
and Dr Davide Sottara will be there. If you have any interesting
research on or with Drools & jBPM that you would like to present on the
day, let us konw.
6-8 Febuary 2012
Vilamoura, Algarve, Portugal
http://www.icaart.org/tutorials.asp
The day is a tutorial day aimed at all levels. It will start with
general introductions to the technology but will slant off to more of
our research based projects such as Drools Semantics and Chance, as it's
part of an academic conference. We would also like to give an
opportunity for the people to present their own research, slots can be
anything from 20minutes to 60 - contact me if you are interested
mproctor at codehaus d0t org.
There will also be plenty of time for discussions and help with your own
projects.
*Abstract*
Drools is the leading open source, industry focused, rule engine. While
Drools started life as a Rete based forward chaining engine, it has
since transcended. It's ongoing mission is to explore declarative
paradigms from a practical and industrial perspective, to boldly go
where no engine has gone before.
The tutorial will start with a gentle introduction, suitable for all
level of expertise, covering the core language and functionality slowly
expanding into more complex areas. The topics covered include, but are
not limited to:
Basic Concepts:
* Patterns, Constraints and Unification
* Data Driven and Goal Oriented Inference using Forward Chaining and
(Opportunistic) Backward Chaining
* Truth Maintenance
* Temporal Reasoning and Complex Event Processing
* Functional Programming
* Traits and Declarative Models
Advanced Topics:
* Decision Tables
* Rule and Workflow Integration
* Hybrid Rule-Based Systems
* Agents and Services
* Unified Testing
*Brief biography of Mark Proctor*
Mark Proctor received his B.Eng in Engineer Science and Technology and
then his M.Sc. in Business and Information Systems; both from Brunel
University, West London. His M.Sc. thesis was in the field of Genetic
Algorithms; which is where he discovered his interest for anything AI
related.
Mark became involved in the Drools expert system project at an early
stage and soon became its project lead. Mark then joined JBoss (later
acquired by Red Hat) as an employee when the Drools project was
federated into the JBoss middleware stack.
Mark now leads the effort at Red Hat for a unified platform for
declarative technologies; with a focus on rules, event processing,
workflow, semantics, distributed agents and governance.
*Brief biography of Davide Sottara*
Davide Sottara received his Ms. Degree in Computer Science(2006) and his
Ph.D (2010) in Computer Science, Electronics and Telecommunications from
the University of Bologna.
His research and development interests include Artificial Intelligence
in general and Decision Support Systems in particular, focusing on
hybrid systems combining predictive models and rule-based systems.
Since 2006, he has been working on the development of intelligent DSSs
in the environmental and medical field. He is a member of the Drools
open source Community, leading a sub-project on the extension of
production rule engines to support hybrid and uncertain reasoning, and
he's also involved in the RuleML rule language standardization
initiative. He is currently working on remote health-care systems
enhanced with AI-based predictive, diagnostic and planning features.
*Contacts*
e-mail: icaart.secretariat(a)insticc.org
<mailto:icaart.secretariat@insticc.org>
13 years
Drools & jBPM at ICAART (Portugal) 4th International Conference on Agents and Artificial Intelligence
by Mark Proctor
<http://4.bp.blogspot.com/-_b77C8kLxEk/TuDUJkn_TlI/AAAAAAAAAnY/_QPFAuMEdOo...>
Droosl & jBPM @ ICAART 2012 is now confirmed, and myself (Mark Proctor)
and Dr Davide Sottara will be there. If you have any interesting
research on or with Drools & jBPM that you would like to present on the
day, let us konw.
6-8 Febuary 2012
Vilamoura, Algarve, Portugal
http://www.icaart.org/tutorials.asp
The day is a tutorial day aimed at all levels. It will start with
general introductions to the technology but will slant off to more of
our research based projects such as Drools Semantics and Chance, as it's
part of an academic conference. We would also like to give an
opportunity for the people to present their own research, slots can be
anything from 20minutes to 60 - contact me if you are interested
mproctor at codehaus d0t org.
There will also be plenty of time for discussions and help with your own
projects.
*Abstract*
Drools is the leading open source, industry focused, rule engine. While
Drools started life as a Rete based forward chaining engine, it has
since transcended. It's ongoing mission is to explore declarative
paradigms from a practical and industrial perspective, to boldly go
where no engine has gone before.
The tutorial will start with a gentle introduction, suitable for all
level of expertise, covering the core language and functionality slowly
expanding into more complex areas. The topics covered include, but are
not limited to:
Basic Concepts:
* Patterns, Constraints and Unification
* Data Driven and Goal Oriented Inference using Forward Chaining and
(Opportunistic) Backward Chaining
* Truth Maintenance
* Temporal Reasoning and Complex Event Processing
* Functional Programming
* Traits and Declarative Models
Advanced Topics:
* Decision Tables
* Rule and Workflow Integration
* Hybrid Rule-Based Systems
* Agents and Services
* Unified Testing
*Brief biography of Mark Proctor*
Mark Proctor received his B.Eng in Engineer Science and Technology and
then his M.Sc. in Business and Information Systems; both from Brunel
University, West London. His M.Sc. thesis was in the field of Genetic
Algorithms; which is where he discovered his interest for anything AI
related.
Mark became involved in the Drools expert system project at an early
stage and soon became its project lead. Mark then joined JBoss (later
acquired by Red Hat) as an employee when the Drools project was
federated into the JBoss middleware stack.
Mark now leads the effort at Red Hat for a unified platform for
declarative technologies; with a focus on rules, event processing,
workflow, semantics, distributed agents and governance.
*Brief biography of Davide Sottara*
Davide Sottara received his Ms. Degree in Computer Science(2006) and his
Ph.D (2010) in Computer Science, Electronics and Telecommunications from
the University of Bologna.
His research and development interests include Artificial Intelligence
in general and Decision Support Systems in particular, focusing on
hybrid systems combining predictive models and rule-based systems.
Since 2006, he has been working on the development of intelligent DSSs
in the environmental and medical field. He is a member of the Drools
open source Community, leading a sub-project on the extension of
production rule engines to support hybrid and uncertain reasoning, and
he's also involved in the RuleML rule language standardization
initiative. He is currently working on remote health-care systems
enhanced with AI-based predictive, diagnostic and planning features.
*Contacts*
e-mail: icaart.secretariat(a)insticc.org
<mailto:icaart.secretariat@insticc.org>
13 years
