The primary reason to move to the "Knowledge APIs" apart from what you've already mentioned is that they help to bring together the

features of Drools. In a single KnowledgeBase you can now have not

rules, but Flows, and Complex Event Processing. As to tracking activity on the agenda... there's two ways... 1. If you're using Eclipse, one great feature of the Drools plugin is the Audit Log. You can start logging with the following code: KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(knowledgeSession,

Then open the resulting log in the Eclipse Drools Audit Log tab and

a pretty good graphical representation of what happened during your

See the following URL for a screenshot:

tml_single/index.html#d0e6801 2. Create your own AgendaEventListener. Simply implement the

and place whatever actions you want on each event. Then attach it to your session before you start processing like this: knowledgeSession.addEventListener(new YourAgendaListener()); Macon -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of SPAAARKY21 Sent: Sunday, October 11, 2009 12:26 PM To: rules-users(a)lists.jboss.org Subject: [rules-users] Drool 5 API and Agenda Listeners I recently moved from Drool 4 to 5 in a little example application I

written. At first I hesitated because I thought the API had changed drastically. When I did upgrade, I found that there were few changes. However, I was still using all of the "Rule" classes instead of the "Knowledge" classes - like RuleBase and StatefulRuleSession instead of KnowledgeBase and StatefulKnowledgeBase. It sounds like the

API is the way of the future so to speak but I haven't been able to find much information on it. What is the advantage in using the new "Knowledge" API? Will the "Rule" API become deprecated at some point? Anyway, after switching to the Knowledge API, I have been working on

agenda listener I had written. What I want to do is iterate through agenda groups on the focus stack and, for each group, iterate through the activations in the order in which they are queued up. However, I

see any way to do that. In fact, since switching to Drools 5 and the "Knowledge" API, it looks like the API for dealing with the agenda and activations and whatnot has become quite small. Or at least it is

you stick to the interfaces. Am I missing a better way of doing this? Brandon -- View this message in context:

04.html Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

I'm basically writing a debugging tool that allows developers to step through the rule engine itself. In a sense, I'm mimicking the way Jess' developers rely on the (all-agenda) and (run 1) functions, but in a graphic way as opposed to command line functions. Inside of afterActivationFired(), I am displaying information like a current view of the agenda, and then waiting for user input before returning control to the rule engine. Tracking the activations myself is a good idea. I'm just disappointed that the Drools' API no longer provides the methods needed to inspect the focus stack and its activations. It used to. I suppose I could always cast the Agenda I get to its concrete implementation but I would rather not. Anyway, thanks again for the help.

Pegram, Macon wrote: > Using the listener, you could construct your own agenda stack to track > what's going on. The AgendaEventListener interface has the methods: > agendaGroupPopped(AgendaGroupPoppedEvent event) > agendaGroupPushed(AgendaGroupPushedEvent event) > > In your listener, construct a java.util.Stack, and just Push/Pop > agenda-group information that you retrieve from the AgendaGroupXXXEvent > onto/off of your internal Stack. You can do similar tracking of event > firing with the "before" or "after" ActivationFired event. Construct a > list to capture the sequence of events. > > I'm not entirely clear on what you're trying to accomplish, but the > event listener interface provides hook points for all the related events > on the agenda, so you should be able to craft a listener to do whatever > you need. I've used a similar mechanism in unit testing to validate > correct processing of a set of agenda groups. > > Macon > > -----Original Message----- > From: rules-users-bounces(a)lists.jboss.org > [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of SPAAARKY21 > Sent: Sunday, October 11, 2009 7:34 PM > To: rules-users(a)lists.jboss.org > Subject: Re: [rules-users] Drool 5 API and Agenda Listeners > > > Thanks for clearing that up for me. > > As for the agenda, I am writing an agenda listener already but the > problem > is getting the information I want. In Drools 5, an > org.drools.event.rule.AgendaEventListener's afterActivationFired() > method > takes an org.drools.event.rule.AfterActivationFiredEvent object but > where do > I go from there? The getKnowledgeRuntime() method returns a > KnowledgeRuntime, which has a getAgenda() method that returns an > org.drools.runtime.rule.Agenda. But that Agenda doesn't have methods > for > getting all of the agenda groups on the focus stack. It only has > methods to > clear the agenda or get an activation/agenda/rule flow group by name. > What > I am looking for is a way to get all of the agenda groups on the focus > stack > (as a List or through an Iterator,) and then get each activation from > each > one of those groups. > > In Drools 4, I would have been using an org.drools.Agenda instead, which > has > a getAgendaGroups() method and AgendaGroup has a getActivations() > method. > In a Drools 5 org.drools.runtime.rule.AgendaGroup, there are only three > methods - clear(), getName() and setFocus() - so even if I could get all > of > the AgendaGroups, it wouldn't do me any good. Do you see why I'm having > trouble doing anything useful with the new API? In Drool 5, are you > supposed to approach this in a different way (not in an agenda > listener?) > > > Pegram, Macon wrote: > >> The primary reason to move to the "Knowledge APIs" apart from what >> you've already mentioned is that they help to bring together the >> > newest > >> features of Drools. In a single KnowledgeBase you can now have not >> > only > >> rules, but Flows, and Complex Event Processing. >> >> As to tracking activity on the agenda... there's two ways... >> 1. If you're using Eclipse, one great feature of the Drools plugin is >> the Audit Log. You can start logging with the following code: >> KnowledgeRuntimeLogger logger = >> KnowledgeRuntimeLoggerFactory.newFileLogger(knowledgeSession, >> > FILENAME); > >> Then open the resulting log in the Eclipse Drools Audit Log tab and >> > get > >> a pretty good graphical representation of what happened during your >> > run. > >> See the following URL for a screenshot: >> >> > http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-expert/h > >> tml_single/index.html#d0e6801 >> >> 2. Create your own AgendaEventListener. Simply implement the >> > interface > >> and place whatever actions you want on each event. Then attach it to >> your session before you start processing like this: >> knowledgeSession.addEventListener(new YourAgendaListener()); >> >> Macon >> >> -----Original Message----- >> From: rules-users-bounces(a)lists.jboss.org >> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of SPAAARKY21 >> Sent: Sunday, October 11, 2009 12:26 PM >> To: rules-users(a)lists.jboss.org >> Subject: [rules-users] Drool 5 API and Agenda Listeners >> >> >> I recently moved from Drool 4 to 5 in a little example application I >> > had > >> written. At first I hesitated because I thought the API had changed >> drastically. When I did upgrade, I found that there were few changes. >> However, I was still using all of the "Rule" classes instead of the >> "Knowledge" classes - like RuleBase and StatefulRuleSession instead of >> KnowledgeBase and StatefulKnowledgeBase. It sounds like the >> > "Knowledge" > >> API >> is the way of the future so to speak but I haven't been able to find >> much >> information on it. What is the advantage in using the new "Knowledge" >> API? >> Will the "Rule" API become deprecated at some point? >> >> Anyway, after switching to the Knowledge API, I have been working on >> > an > >> agenda listener I had written. What I want to do is iterate through >> agenda >> groups on the focus stack and, for each group, iterate through the >> activations in the order in which they are queued up. However, I >> > don't > >> see >> any way to do that. In fact, since switching to Drools 5 and the >> "Knowledge" API, it looks like the API for dealing with the agenda and >> activations and whatnot has become quite small. Or at least it is >> > when > >> you >> stick to the interfaces. Am I missing a better way of doing this? >> >> Brandon >> -- >> View this message in context: >> >> > http://www.nabble.com/Drool-5-API-and-Agenda-Listeners-tp25844904p258449 > >> 04.html >> Sent from the drools - user mailing list archive at Nabble.com. >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> > -- > View this message in context: > http://www.nabble.com/Drool-5-API-and-Agenda-Listeners-tp25844904p258488 > 53.html > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > >