March 2010 - rules-dev - Jboss List Archives

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 … [View More]

11 years, 1 month

7
9
0 / 0

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 … [View More]

13 years

6
8
0 / 0

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

14 years, 5 months

5
6
0 / 0

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 … [View More]

14 years, 10 months

4
4
0 / 0

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

14 years, 11 months

5
7
0 / 0

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(… [View More]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 [View Less]

14 years, 12 months

2
2
0 / 0

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 … [View More]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. [View Less]

14 years, 12 months

1
0
0 / 0

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 … [View More]

14 years, 12 months

3
6
0 / 0

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 … [View More]

15 years

3
3
0 / 0

Fosdem 50 minute introduction into Drools

by Mark Proctor

http://blog.athico.com/2010/03/fosdem-50-minute-introduction-into.html

15 years

1
0
0 / 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

rules-dev March 2010