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
10 years, 2 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
12 years, 1 month
Drools on android
by Justin King
Hi All,
I'm wondering if anyone has tried to use drools in a google android
application, and if so what problems did you have? I'd also be interested to
know if its even possible!
Thanks!
--
Regards,
Justin King
PhD Candidate
Faculty of Information and Communication Technologies
Swinburne University of Technology
http://www.ict.swin.edu.au/ictstaff/justinking
--
Regards,
Justin King
PhD Candidate
Faculty of Information and Communication Technologies
Swinburne University of Technology
http://www.ict.swin.edu.au/ictstaff/justinking
12 years, 3 months
deprecating old core/compiler apis
by Mark Proctor
We've attempted to keep the main core/compiler api compatabile in our
codebase for our existing users, while providing the new drools-api.
However this leaves a lot of messy code and we think it's time to start
cleaning up. So anyone think it'll be a problem if stuff in core and
compiler starts to change?
Mark
13 years, 4 months
Stretching spreadsheets
by Wolfgang Laun
I have, at long last, overcome my disinclination against spreadsheets and
played around a bit.
As one of the incentives (perhaps the main one) for this kind of rule
authoring appears to be a "syntax" cushioning by spreadsheet entries, I feel
that additional simplifications might be appreciated. Therefore, I have
modified some classes in org.drools.decisiontable.parser, to achieve the
following, in the area of RuleSet entries:
- All entries are now repeatable, either by adding more cells to the
right of "import" than just one (with a comma-separated list) or by writing
more that one "Import" row.
- Same for "Variables", "Functions" and "Queries".
- All tags ("Import",...) are case insensitive and immune against leading
and trailing spaces.
- Some user errors don't cause NPE; they throw an exception with an
explanatory message
Opinions, please, and should I just release this, or would someone care to
have a look and test it?
-W
13 years, 4 months
5.2.0-SNAPSHOT java.io.OptionalDataException (repost)
by mjhn
Hi,
I had previously posted to drools-users. Maybe wrong place for it. I am an
absolute new user. Excited and Very keen to have this working and for any
feedback to help me progress.
I'm using the 5.2.0-SNAPSHOT binaries for making use of the new auth
attributes in the kagent:resource tag.
I'm attempting to get PKG out of Guvnor. Using the following
droolsservice.xml config
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:drools="http://drools.org/schema/drools-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://drools.org/schema/drools-spring
http://192.168.2.2/~martinjohnson/xmpp_code/drools-spring-1.2.0.xsd
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd" >
<drools:kagent kbase="knowledgeBase" id="kagent" new-instance="false">
<drools:resources>
<drools:resource type="CHANGE_SET"
basic-authentication="enabled" username="admin" password=""
source="http://localhost:8080/drools-guvnor.war/org.drools.guvnor.Guvnor/package/..."
/>
</drools:resources>
</drools:kagent>
</beans>
As far as i can tell the ChangeSet.xml is coming down. The PKG accessed.
Though then...
Nov 25, 2010 9:09:52 PM com.javawhat.rules.RuleAgentManager init
INFO: Loading knowledge agents ...
Nov 25, 2010 9:09:52 PM com.javawhat.rules.RuleAgentManager init
INFO: Initializing knowledge agents with package:
[2010:11:329 21:11:675:info] ResourceChangeScanner reconfigured with
interval=60
[2010:11:329 21:11:676:info] ResourceChangeScanner created with default
interval=60
[2010:11:329 21:11:682:info] ResourceChangeScanner reconfigured with
interval=120
[2010:11:329 21:11:682:info] ResourceChangeScanner reconfigured with
interval=120
[2010:11:329 21:11:14:info] ResourceChangeNotification created
[2010:11:329 21:11:14:debug] ResourceChangeNotification monitor added
monitor=org.drools.io.impl.ResourceChangeScannerImpl@37722456
[2010:11:329 21:11:17:debug] KnowledgeAgent building resource map
[2010:11:329 21:11:17:info] KnowledegAgent has started listening for
ChangeSet notifications
[2010:11:329 21:11:18:info] KnowledgeAgent created, with configuration:
monitorChangeSetEvents=true scanResources=true scanDirectories=true
newInstance=false
[2010:11:329 21:11:514:info] KnowledgeAgent applying ChangeSet
[2010:11:329 21:11:516:debug] KnowledgeAgent notifier subscribing to
resource=[UrlResource
path='http://localhost:8080/drools-guvnor.war/org.drools.guvnor.Guvnor/package/...']
[2010:11:329 21:11:516:debug] ResourceChangeNotification subscribing
listener=org.drools.agent.impl.KnowledgeAgentImpl@23000bcf to
resource=[UrlResource
path='http://localhost:8080/drools-guvnor.war/org.drools.guvnor.Guvnor/package/...']
[2010:11:329 21:11:516:debug] ResourceChangeScanner subcribing
notifier=org.drools.io.impl.ResourceChangeNotifierImpl@580754fc to
resource=[UrlResource
path='http://localhost:8080/drools-guvnor.war/org.drools.guvnor.Guvnor/package/...']
[2010:11:329 21:11:517:debug] KnowledgeAgent rebuilding KnowledgeBase using
ChangeSet
[2010:11:329 21:11:517:info] KnowledgeAgent performing an incremental build
of the ChangeSet
[2010:11:329 21:11:280:exception]
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:665)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:618)
at
org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:809)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:587)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:186)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:169)
at
com.javawhat.rules.RuleAgentManager.createKnowledgeAgent(RuleAgentManager.java:125)
at com.javawhat.rules.RuleAgentManager.init(RuleAgentManager.java:85)
at
com.javawhat.rules.RuleAgentManager.getInstance(RuleAgentManager.java:48)
at com.adstream.test.Main.main(Main.java:53)
Caused by: java.io.OptionalDataException
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1282)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at
org.drools.rule.JavaDialectRuntimeData.readExternal(JavaDialectRuntimeData.java:167)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1791)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at java.util.HashMap.readObject(HashMap.java:1030)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at
org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:59)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1791)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at org.drools.rule.Package.readExternal(Package.java:197)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1791)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at
org.drools.core.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:205)
at
org.drools.core.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:174)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:654)
... 9 more
[2010:11:329 21:11:283:warning] KnowledgeAgent: The resource didn't create
any package: [UrlResource
path='http://localhost:8080/drools-guvnor.war/org.drools.guvnor.Guvnor/package/...']
[2010:11:329 21:11:283:info] KnowledgeAgent incremental build of
KnowledgeBase finished and in use
[2010:11:329 21:11:284:debug] KnowledgeAgent finished rebuilding
KnowledgeBase using ChangeSet
The issue lies behind 'stream.readObject();' from JavaDialectRuntimeData
around line 167
// Return the object stored as a byte[]
byte[] bytes = (byte[]) stream.readObject();
if ( signed ) {
checkSignature( stream,
helper,
bytes,
pubKeyAlias );
}
guvnor and my sample app are both running 5.2.0-SNAPSHOT. Really appreciate
any advice. Is it falling over an a parse of the binary and some
disagreement on contents of payload?
Thanks
Martin
--
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13 years, 5 months
