2:48 a.m.
Unfortunately that might be quite tricky, although I can try if
necessary. I do think that perhaps the problem lies in the way I
handle the auto-updating, I think I'm doing it wrong. Originally I
just created the knowledge base and knowledge agent like so, and
started the ResourceChange Notifier and Scanner services:
//construct a knowledgebase that uses Equality mode assert behaviour
so that it can match beans properly
KnowledgeBaseConfiguration knowledgeBaseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
knowledgeBaseConfig.setProperty("drools.assertBehaviour",
"equality");
knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase(knowledgeBaseConfig);
//create a new knowledgeAgent to track changes
knowledgeAgent = KnowledgeAgentFactory.newKnowledgeAgent(
"knowledgeAgent", knowledgeBase );
knowledgeAgent.applyChangeSet( ResourceFactory.newClassPathResource(
"changeSet.xml" ) );
knowledgeBase = knowledgeAgent.getKnowledgeBase();
ResourceFactory.getResourceChangeNotifierService().start();
ResourceFactory.getResourceChangeScannerService().start();
This seemed to claim to update the knowledge base, but nothing changed
as I mentioned before. At the moment, I'm trying rebuilding the
knowledgebase when I detect a change, but this involves re-inserting
the entire database which could be big eventuallly... And it doesn't
even work entirely correctly either XD.
What are the correct steps to take to keep a knowledgeBase
auto-updating, and do you have to re-create it each time?
Thanks,
Stephen
Quoting Esteban Aliverti <esteban.aliverti(a)gmail.com>:
Could you please try your example using latest SNAPSHOT or 5.1M2?
Thanks
On Thu, Jun 24, 2010 at 10:20 AM, Stephen Mcgruer
<s0840449(a)sms.ed.ac.uk>wrote:
> Sorry, I'm using Drools 5.0.1
>
> Cheers,
> Stephen
>
> Quoting Esteban Aliverti <esteban.aliverti(a)gmail.com>:
>
> > Which version of drools are you using?
> >
> > On Thu, Jun 24, 2010 at 5:33 AM, Stephen Mcgruer
> > <s0840449(a)sms.ed.ac.uk>wrote:
> >
> >> Hi there. I'm trying to get automatic update of rules working in my
> >> project, and seem to
> >> have run into a problem. As far as I can tell, automatic polling and
> >> updating is turned
> >> on, and claims to update the knowledgebase, but changes to the rules
> >> don't seem to have
> >> any effect. A simple example - if I add the rule:
> >>
> >> rule "TestRule"
> >> dialect "mvel"
> >> when
> >> then
> >> System.out.println("Hello, world!");
> >> end
> >>
> >> And start my application, I get:
> >>
> >> Firing all rules...
> >> Hello, world!
> >> All rules fired.
> >>
> >> As expected. If I then change the rule as follows:
> >>
> >> rule "TestRule"
> >> dialect "mvel"
> >> when
> >> then
> >> System.out.println("I have changed!");
> >> end
> >>
> >> I get this output (timestamps trimmed for readability):
> >>
> >> ResourceChangeScanner attempt to scan 1 resources
> >> ResourceChangeScanner modified resource=[UrlResource
> >> path='
> >>
> http://localhost:1337/drools-guvnor/org.drools.guvnor.Guvnor/package/ERMI...
> >> ']
> >> :
> >> 1277371031000 : 1277371254000
> >> ResourceChangeNotification received ChangeSet notification
> >> ResourceChangeScanner thread is waiting for 60
> >> ResourceChangeNotification processing ChangeSet
> >> ResourceChangeNotification ChangeSet modified resource=[UrlResource
> >> path='
> >>
> http://localhost:1337/drools-guvnor/org.drools.guvnor.Guvnor/package/ERMI...
> >> ']
> >> for listener=org.drools.agent.impl.KnowledgeAgentImpl@e2d0b2
> >> KnowledgeAgent received ChangeSet changed notification
> >> ResourceChangeNotification thread is waiting for queue update
> >> KnowledgAgent applying ChangeSet
> >> KnowledgeAgent ChangeSet requires KnowledgeBuilderKnowledgeAgent
> >> rebuilding KnowledgeBase
> >> using ChangeSet
> >> KnowledgeAgent building resource=[UrlResource
> >> path='
> >>
> http://localhost:1337/drools-guvnor/org.drools.guvnor.Guvnor/package/ERMI...
> >> ']
> >> KnowledgeAgent adding KnowledgeDefinitionsPackage ERMIE
> >> KnowledgeAgent new KnowledgeBase now built and in use
> >>
> >> So, this makes it seem like everything has worked. However, if I
> >> insert a new fact and
> >> fire all rules...
> >>
> >> Inserting new fact...
> >> Hello, World!
> >>
> >> So, it hasn't worked. What might I have done wrong?
> >>
> >>
> >> -Stephen
> >>
> >> --
> >> The University of Edinburgh is a charitable body, registered in
> >> Scotland, with registration number SC005336.
> >>
> >>
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
> >
> >
> > --
> > XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> >
> > Esteban Aliverti
> >
>
>
>
> --
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
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Esteban Aliverti
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.