[rules-users] More than one agenda group for a rule?

[Greg Barton]

You could do the same thing by structuring your rules in a certain way.  Have an object of that defines the current context.  i.e.

class Context {
  String name;
}

The each rule matches on whether a given Context is asserted in working memory.  

when 
  exists Context(name == "foo")
  ...
then
...
end

This can be as flexible as you please:

when 
  exists Context(name matches ".*startup.*")
  ...
then
...
end

--- On Tue, 9/2/08, Bagwell, Allen F <afbagwe at sandia.gov> wrote:

> From: Bagwell, Allen F <afbagwe at sandia.gov>
> Subject: RE: [rules-users] More than one agenda group for a rule?
> To: "Rules Users List" <rules-users at lists.jboss.org>
> Date: Tuesday, September 2, 2008, 1:20 PM
> Our rule engine software made by Talarian Corporation as
> part of their RTworks suite.
> 
> The company was bought out by TIBCO several years ago, and
> the software is no longer supported. They essentially
> consigned it to the dust bin. And with a massive upgrade to
> our system, we had to find a rule engine alternative.
> 
> The old RTworks rule engine concept of an AgendaGroup was
> called a "Context". You could assign a rule to as
> many contexts as you wanted. You just listed their names,
> separated by semi-colons, following the context keyword.
> 
> There are always trade-offs when switching, but Drools has
> many more features we could only wish were present in the
> old software.
> 
> -A
> 
> ________________________________
> From: rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of
> Mark Proctor
> Sent: Wednesday, August 27, 2008 2:06 PM
> To: Rules Users List
> Subject: Re: [rules-users] More than one agenda group for a
> rule?
> 
> Bagwell, Allen F wrote:
> 
> That's not so welcome news. Our old rule engine
> software had this ability. We'll find a work-around, but
> is this being considered in a later update to Drools?  My
> thought is that rule should be like method: you really
> should only need to write it once.
> 
> 
> no plans to add this, especially as ruleflow is the
> preferred way to orchestration rules so that's where our
> focus is these days. Which is your old rule engine that
> supported this? I don't believe jess or clips allow a
> rule to live in multiple modules - which is what
> AgendaGroups is based on.
> 
> Mark
> 
> -A
> 
> 
> -----Original Message-----
> From:
> rules-users-bounces at lists.jboss.org<mailto:rules-users-bounces at lists.jboss.org>
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of
> Mark Proctor
> Sent: Wednesday, August 27, 2008 12:07 PM
> To: Rules Users List
> Subject: Re: [rules-users] More than one agenda group for a
> rule?
> 
> Bagwell, Allen F wrote:
> 
> 
> I was wondering (hoping) that there is a way to put a rule
> into more
> than one agenda group?
> 
> I've tried writing:
> 
> rule "example"
>    agenda-group "process x stuff"
>    agenda-group "process y stuff"
>    when
>         (blah, blah, blah)
>    then
>         (blah, blah, blah)
> end
> 
> But while the compiler has no problems with this it really
> only
> includes the rule in the last agenda-group listed.
> 
> 
> nope, not possible.
> 
> 
> Thanks,
> Allen
> 
> 
> 
> ----------------------------------------------------------------------
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