Semantic Web Drools Module, Request for Feedbak
by Xavier Breton
Hi,
I'm looking for feedback, I'll develop a Semantic Web Drools Module that
will be the subject of my Master Degree Tesis.
The idea is to use Eclipse Modelling Framework (EMF) for prototyping and
follow a Model Driven Architecture (MDA) where the source language is
Semantic of Business Vocabularies and Business Rules (SBVR) and the target
language is Drools DRL.
The mapping could be (PIM level):
- Semantic Web Rule Language (SWRL)
- Ontology Web Language (OWL)
- RuleML
- Rule Interchange Format (RIF)
- REWERSE Rule Markup Language (R2ML)
It could be added to the module at the source UML or Entity Relationship
like models to transform the models into SBVR.
Regards
Xavier Breton
11 years, 8 months
Guided Editor in BRMS / Guvnor Version 5 (Snapshot of 26 June)
by Paul Browne
Folks,
For various reasons I'm trying out the Guided Editor for Business Rules in
the Guvnor Version 5 (Snapshot of 26 June from Hudson, deployed on JBoss App
Server 4.2.2GA).
I've created the Package / Category and uploaded a simple fact model (as
works in BRMS version 4). I create a new business rule using the guided
editor and the screen shows successfully with both 'When' and 'Then'
parts.Assume the next question is due to me missing something, but wanted to
double check:
When I press the green '+' to the right of the screen I am shown the message
/ dialog layer saying '
*Add a condition to the rule... *or* Add an action to the rule.
*Problem is that there doesn't appear to be a way of adding a condition or
action. The only thing I'm seeing in the logs is
* (Contexts.java:flushAndDestroyContexts:335) could not discover
transaction status
*Am I missing something or should I come back to Guvnor later in the
development Cycle?
Thanks
Paul
13 years, 7 months
unknown error while parsing
by Boschung Daniel
hi folks
drools prompt me to contact the development team. the following error apears, whithout stacktrace, while developing
a rule. maybe the error is known to you?!
thanks for a little statement
daniel
15 years
build error in docs
by jschmied
Hi!
Im trying "mvn package" in the "trunk\drools-docs" subdir (fresh checkout)
and get:
[INFO] Scanning for projects...
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO]
------------------------------------------------------------------------
[INFO] The projects in the reactor contain a cyclic reference: Edge between
'Vertex{label='org.drools:docbook-xsl-drools'}' and 'Vertex{labe
l='org.drools:docbook-style-drools'}' introduces to cycle in the graph
org.drools:docbook-style-drools --> org.drools:docbook-xsl-drools -->
org.drools:docbook-style-drools
[INFO]
------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO]
------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Fri Feb 05 13:10:01 CET 2010
[INFO] Final Memory: 2M/5M
[INFO]
------------------------------------------------------------------------
I found this problem aked before here but no real solution.
Thanks
Juergen
--
View this message in context: http://n3.nabble.com/build-error-in-docs-tp196316p196316.html
Sent from the Drools - Dev mailing list archive at Nabble.com.
15 years, 5 months
Drools + Spring
by Abu Rasheed
Are there any plans to have Spring support in drools-api? The last mail that
I saw in searching the topic is dated last year, and there are no new
postings related to this.
Does anyone have any success in injecting KnowledgeBase into their apps
using Spring? Is there any examples out there that I can refer to?
Thanks
15 years, 6 months
Bug in BetaNode#doRemove()?
by Andreas Kohn
Hi,
while working further on our drools integration we came across an odd
exception when removing a particular rule:
java.lang.IllegalArgumentException: Cannot remove a sink, when the list of sinks is null
at org.drools.reteoo.ObjectSource.removeObjectSink(ObjectSource.java:159)
at org.drools.reteoo.RightInputAdapterNode.doRemove(RightInputAdapterNode.java:217)
at org.drools.common.BaseNode.remove(BaseNode.java:95)
at org.drools.reteoo.BetaNode.doRemove(BetaNode.java:275)
at org.drools.common.BaseNode.remove(BaseNode.java:95)
at org.drools.reteoo.BetaNode.doRemove(BetaNode.java:280)
at org.drools.common.BaseNode.remove(BaseNode.java:95)
at org.drools.reteoo.RuleTerminalNode.doRemove(RuleTerminalNode.java:387)
at org.drools.common.BaseNode.remove(BaseNode.java:95)
at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:237)
at org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:371)
at org.drools.common.AbstractRuleBase.removeRule(AbstractRuleBase.java:746)
While stepping through the code it looked like the network was corrupt (there was indeed no
sinks on the ObjectSource, but the node calling removeObjectSink was still linked to it
and claiming it as source).
The rule itself contains multiple NotNodes, checking a condition that looks like this:
not(not(Foo.v = X) and not(Foo.v = Y))
I could track this down to some sort of "loop" in the rete that triggers this when the outer
not node is removed.
When removing BetaNode#doRemove() first walks along 'rightInput':
this.rightInput.remove( context,
builder,
this,
workingMemories );
and eventually _in that call_ it also hits a node that is the direct 'leftInput' of the original beta node.
The removal marks that node as visited in the removal context, and when the 'rightInput.remove' returns to the
beta node it does not visit the leftInput due to this condition in BetaNode#doRemove():
if ( !context.alreadyVisited( this.leftInput ) ) {
this.leftInput.remove( context,
builder,
this,
workingMemories );
}
In other words: before the remove the BetaNode had another node that was both referenced directly as 'leftInput',
as well as an input to the 'rightInput'.
The first removal of the rule "worked", and no exceptions happened. But: any further attempt to re-add the same rule and remove
it again lead to the exception above.
I was able to fix it with the attached patch, reproduced here:
+ boolean needRemoveFromLeft = !context.alreadyVisited( this.leftInput );
this.rightInput.remove( context,
builder,
this,
workingMemories );
- if ( !context.alreadyVisited( this.leftInput ) ) {
+ if ( needRemoveFromLeft ) {
this.leftInput.remove( context,
builder,
this,
workingMemories );
}
With this patch applied I could add/delete/add the particular rule repeatedly without problems.
The attached patch also adds an assert in ObjectSource#removeObjectSink(): when removing a sink from an object source with
only one sink the sink was unconditionally replaced with an empty sink, although the argument ObjectSink could be a different
sink than the one in the ObjectSource. For CompositeObjectSinkAdapters this case is checked, but not for single sinks.
I originally suspected that place to be responsible for the problem I observed but the assertion never fired in my tests.
Should I open a JIRA issue? Unfortunately I cannot provide a DRL to reproduce the issue, but I could
try dumping the rulebase if that would help.
Regards,
--
Andreas
--
Never attribute to malice that which can be adequately explained by
stupidity. -- Hanlon's Razor
15 years, 7 months
Drools OSS Meeting 19th - 23rd of April now at the Hacienda Hotel (San Diego)
by Mark Proctor
http://blog.athico.com/2010/03/drools-oss-meeting-19th-23rd-of-april.html
http://community.jboss.org/wiki/DroolsBootCampSanDiegoApril2010
Due to unexpected levels of attendance we've moved the event from the
provided location to a larger one. This provided the opportunity to
locate the event at a hotel, so people can stay in the same building as
the meeting. We are now located at the Hacienda Hotel
<http://haciendahotel-oldtown.com> in Old Town, near plenty of
restaurants and a trolley bus to Down Town which is 10 minutes away. So
if you have booked another hotel I would recommend you cancel it and
relocate to the Hacienda.
A special hotel rate of $110 per night is available under the booking
reference "Drools", but hurry as space is limited and we have not done
any block reservations. The event itself is free of charge. Breakfast
will be provided each morning, as part of the conference, and coffee
will be available throughout the day. If anyone would like to sponsor
lunch, let me know :) mproctor at codehaus d0t org.
Hacienda Hotel <http://haciendahotel-oldtown.com/> (4041 Harney Street .
San Diego, CA 92110 . 800-888-1991)
(click to enlarge)
<http://2.bp.blogspot.com/_Jrhwx8X9P7g/S7F3oW75hKI/AAAAAAAAAZ8/pmta54bAmAc...>
Details of the conference can be found at the registration page here:
http://community.jboss.org/wiki/DroolsBootCampSanDiegoApril2010
The meeting is really shaping up with many top names attending:
JBoss, OSDE (Argentinian Healthcare), AT&T, SAIC, Kaiser, VA, Naval
Health Research Center, Clinica, Decision Management Solutions,
University of Utah / VA, Intermountain Healthcare, termMed IT, Versatile
Systems, GE Healthcare, Open Health Data, Pharmacy OneSource, Wake
Forest University Health Science, Recondo Technology, Zementis,
University of Maryland, University of Bologna, Duke University.
We have the most excellent James Taylor key noting on Wednesday
<http://blog.athico.com/2010/03/james-taylor-to-key-note-for-drools.html>,
with many other interesting talks planned:
*Name* *Talk*
James Taylor (Decision Management Solutions
<http://www.decisionmanagementsolutions.com/>) *Wed 9am Key Note :*
Smarter systems for uncertain times
Mark Proctor (JBoss) Intro to Drools 5
Mark Proctor (JBoss) Rule Authoring Techniques
Mark Proctor (JBoss) Spring, Camel and OSGi integration
Kris Verlaenen (JBoss)
Building Domain Specific Workflows for Clinical Decision Support
Kris Verlaenen (JBoss) Dynamic Fragments for Non-Linear Execution of
Adaptive Processes
Edson Tirelli (JBoss) Applying Complex Event Processing
Davide Sottara (University of Bologna) Hybrid Ontologies
Davide Sottara (University of Bologna) Enhancing Rules with Uncertainty
and Vagueness
Ken Kawamoto (Duke University) Clinical Decision Support with HL7 and
Drools
Emory Fry (NHRC) Delivering Real-Time Clinical Decision Support
Joe White (Recondo Techology) Healthcare EDI Processing Using Drools
Kostas Stathatos (Zementis <http://www.zementis.com/>) Drools &
Predictive Analytics: Follow Your Rules and Listen to Your Data
Monday and Tuesday are focused on the medical/healthcare industries, but
Wednesday onwards are open to all.
15 years, 7 months
Drools Language and Engine Enhancement Ideas and Request for Help
by Mark Proctor
We really need people's help on developing the expert language and
engine, and there are still some seriously cool ideas to be done. I've
started to put some wiki pages together that collates all our ideas.
So take a look, see what interests you, or come and chat with us for
help on a direction. Then beg and scream to your managers for 6 months
to work on these ideas :) Tell them it's their civic duty to support the
open source project that has saved them so much time and money, and that
it'll make them and you more appealing to the opposite sex too -
guaranteed, just ask Edson and Kris ;)
http://blog.athico.com/2010/03/drools-language-and-engine-enhancement.html
Mark
15 years, 7 months
build failure UrlResource & org.apache.commons.codec.binary
by Geoffrey De Smet
Hi guys
Locally I get compilation error in drools-core, but hudson is also
failing on drools-api.
[INFO]
------------------------------------------------------------------------
[INFO] Building Drools :: Core
[INFO] task-segment: [clean, install]
[INFO]
------------------------------------------------------------------------
[INFO] [clean:clean]
[INFO] Deleting directory
/home/ge0ffrey/projects/jboss/drools/drools-core/target
[INFO] [resources:resources]
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 9 resources
[INFO] [compiler:compile]
[INFO] Compiling 1050 source files to
/home/ge0ffrey/projects/jboss/drools/drools-core/target/classes
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO]
------------------------------------------------------------------------
[INFO] Compilation failure
/home/ge0ffrey/projects/jboss/drools/drools-core/src/main/java/org/drools/io/impl/UrlResource.java:[29,38]
package org.apache.commons.codec.binary does not exist
/home/ge0ffrey/projects/jboss/drools/drools-core/src/main/java/org/drools/agent/HttpClientImpl.java:[12,38]
package org.apache.commons.codec.binary does not exist
/home/ge0ffrey/projects/jboss/drools/drools-core/src/main/java/org/drools/io/impl/UrlResource.java:[186,26]
cannot find symbol
symbol : variable Base64
location: class org.drools.io.impl.UrlResource
/home/ge0ffrey/projects/jboss/drools/drools-core/src/main/java/org/drools/agent/HttpClientImpl.java:[54,26]
cannot find symbol
symbol : variable Base64
location: class org.drools.agent.HttpClientImpl
https://hudson.jboss.org/hudson/job/drools/
--
With kind regards,
Geoffrey De Smet
15 years, 7 months
