[rules-users] expert: usage of ruleflow-groups

[miguel machado]

Hi again,

Thank you for clearing that up. I didn't think it worked that way because
i've tried it before and it didn't work. Anyway, according to what you're
saying...

* this is the stack as soon as i insert my objects: | MAIN |

* this is the stack as soon as i setFocus on a specific agenda-group: |
FOCUSED_GROUP | MAIN | (from left to right)

* as soon as all activations from FOCUSED_GROUP fire, that agenda-group is
popped out of the stack and the rule engine fires the remaining activations
from MAIN

Is this the way it works? I've tried this before with no success. I get
rules firing from agenda-groups that *are not focused before* (besides MAIN,
of course). Maybe this has something to do with the rules being declared in
XML? Or some kind of bug?

Thank you.
_ miguel




On Wed, May 5, 2010 at 6:40 AM, Wolfgang Laun <wolfgang.laun at gmail.com>wrote:

> > @Wolfgang:
> > My problem is that i cannot have the different rule groups stacked. I may
> do
> > as you suggested, but i'll have rules firing from other agenda-groups
> after
> > the first agenda-group activations are all gone (because they go into the
> > stack as well, right?).
>
> No, no, no! Nothing goes on the stack unless you setFocus()!
>
> What i'm looking for is a way to isolate the
> > execution and just fire the rules within a specific set (aka just one
> > group). Does this make any sense?
>
> This is *exactly* what my sketchy statement sequence does, in
> an existing application.
> -W
>
> > Thank you for your support. I appreciate all the help i can get.
> > _ miguel
> >
> >
> >
> > On Tue, May 4, 2010 at 4:46 PM, Wolfgang Laun <wolfgang.laun at gmail.com>
> > wrote:
> >>
> >> I've been using agenda groups without any trouble for a similar problem,
> >> doing
> >>  setFocus( ... );
> >>  insert( ... );... insert( ... );
> >>  fireAllRules();
> >> repeatedly.
> >>
> >> You don't have to be afraid of the focus stack growing indefinitely:You
> >> control
> >> the "push" (setFocus()), and if an agenda group's activations are all
> >> gone, the
> >> group is automatically popped from the stack.
> >>
> >> -W
> >>
> >> 2010/5/4 Miguel Machado <mls.machado at gmail.com>:
> >> > Hi there,
> >> > I'm having some trouble implementing the desired workflow of rule
> firing
> >> > in
> >> > an application using drools expert. I've read the thread about the
> >> > difference between ruleflow groups and agenda groups, but it is still
> >> > unclear to me how to achieve what i need.
> >> > What i intend to have is the ability to fire a specific set of rules
> >> > according to the object i'm inserting into the ksession.
> >> > I do not want to use agenda-groups because it stacks all the agenda
> >> > groups
> >> > declared on the rule file (as far as i understand) and therefore it
> may
> >> > fire
> >> > activations i do not want to be fired. Instead, i want to isolate them
> >> > completely. I tried using ruleflow groups for this, but i cannot find
> a
> >> > way
> >> > to activate a specific group programmatically, before calling
> >> > fireAllRules(), the way i can with agenda-groups (setFocus() method).
> >> > That being said, i'm asking for help in trying to use either one of
> >> > ruleflow/agenda groups or even both in order to get things working the
> >> > way i
> >> > described.
> >> > Thanks in advance,
> >> > _ miguel
> >> >
> >> > _______________________________________________
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> >> > rules-users at lists.jboss.org
> >> > https://lists.jboss.org/mailman/listinfo/rules-users
> >> >
> >> >
> >>
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> >
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"To understand what is recursion you must first understand recursion"
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