[rules-users] How to write a rule that fires when it matches against specific facts in working memory.

[Edson Tirelli]

   I suggest you use this as a base for your implementation, as I think it
will help you:

https://github.com/droolsjbpm/droolsjbpm/blob/master/drools-core/src/main/java/org/drools/base/accumulators/CollectSetAccumulateFunction.java

<https://github.com/droolsjbpm/droolsjbpm/blob/master/drools-core/src/main/java/org/drools/base/accumulators/CollectSetAccumulateFunction.java>
Edson

2011/1/26 groovenarula <gnarula1 at la-z-boy.com>

> Thanks Wolfgang. I found it. I Work on it and let you'll know how it goes.
>
> Sent from my iPhone
>
> On Jan 27, 2011, at 1:08 AM, "Wolfgang Laun-2 [via Drools - Java Rules
> Engine]" <[hidden email]<http://user/SendEmail.jtp?type=node&node=2359225&i=0>>
> wrote:
>
> Accumulate functions are very well documented in the Expert manual. Look
> for a section titled "Accumulate Functions".
>
> You could also use accumulate with all the steps in inline code, which is
> documented in the preceding section.
>
> -W
>
>
>
> On 26 January 2011 16:50, groovenarula <[hidden email]<http://user/SendEmail.jtp?type=node&node=2356705&i=0&by-user=t>
> > wrote:
>
>>
>> Thanks for outlining the approach, Edson.
>>
>> Unfortunately, I'm a newbie using drools, so I just need some
>> clarification
>> on what you mean by 'matchAll is your own accumulate function with the
>> semantics you described.' ? Do you mean that I have to create a 'custom'
>> accumulate function ?
>>
>> Edson, if that's the case, then I'll try to search for example of creating
>> a
>> custom function. When I last searched, I did find an example on the
>> Internet, however, I don't think I found details of how to make the
>> function
>> available to the rules engine (is it as simple as including the jar in the
>> classpath or do I need to take addtional steps to use Matchall in drl ?)
>>
>> Can you please elaborate for the benefit of a noobie ?
>>
>> Thanks
>> Gurvinder
>>
>> --
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-- 
  Edson Tirelli
  JBoss Drools Core Development
  JBoss by Red Hat @ www.jboss.com
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