[rules-users] Adding change/event listener to package

[Wolfgang Laun]

2012/3/2 Jian Feng Ng <jng42 at csc.com>

> I tried but it doesn't seem to work. I am using UrlResource for the
> KnowledgeAgent.
>
> kagent.getKnowledgeBase().addEventListener(new foo());
> ResourceFactory.getResourceChangeNotifierService().start();
> ResourceFactory.getResourceChangeScannerService().start();
>
> But when the package is rescan, foo seems to be gone as kagent rebuilds
> knowledgebase?
>
>
The Knowledge Agent builds a new Knowledge Base when resources change. You
should set up a listener for the Agent to detect KnowledgeBaseUpdatedEvent
and other Agent events.
-W


>
>
> -----rules-users-bounces at lists.jboss.org wrote: -----
>
> To: Rules Users List <rules-users at lists.jboss.org><rules-users at lists.jboss.org>
> From: Wolfgang Laun **
> Sent by: rules-users-bounces at lists.jboss.org
> Date: 03/01/2012 05:21PM
> Subject: Re: [rules-users] Adding change/event listener to package
>
> As with all Listeners in Java, you write a class implementing the methods
> defined by the interface. The parameter types tell you about what is passed
> to the respective call.
>
> class Foo implements KnowledgeBaseEventListener {
>     public void afterRuleAdded(AfterRuleAddedEvent event){
>         if( "WatchedPackage".equals( event.getRule().getPackageName() ){
>
>         }
>     }
>
>     //...
> }
>
> A new Foo is attached to the kSession object - that's all.
>
> -W
>
> 2012/3/1 Jian Feng Ng <jng42 at csc.com>:
> > I saw many interfaces, but the problem is I do not know how to 'use'
> them.
> > Is there a tutorial or example codes somewhere?
> >
> >
> >
> > -----rules-users-bounces at lists.jboss.org wrote: -----
> >
> > To: Rules Users List <rules-users at lists.jboss.org>
> > From: Wolfgang Laun
> > Sent by: rules-users-bounces at lists.jboss.org
> > Date: 03/01/2012 04:38PM
> > Subject: Re: [rules-users] Adding change/event listener to package
> >
> > See the javadoc on a lot of interfaces in org.drools.event.knowledgebase.
> > The expert manual has a section on the "Event Model" showing how to
> attach a
> > listener to the knowledge session (not a package).
> > -W
> >
> >
> >
> > 2012/3/1 Jian Feng Ng <jng42 at csc.com>
> >>
> >> I wish to add a listener to a package, so that my application can do
> >> something else when there is any creation or deletion of rules in the
> >> package. May I know how can I do this?
> >>
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