[rules-users] How to use KnowledgeBase

[Wolfgang Laun]

Hi Max,

Also, consider serializing individual Knowledge Packages containing
logically related rules. You may combine them to create several knowledge
bases and serialize them, or create them during application startup.

Once you have a knowledge base, any number of sessions can be started. Make
sure to call dispose() to free (stateful) session resources.

-W


On 14 April 2011 09:13, FrankVhh <frank.vanhoenshoven at agserv.eu> wrote:

> Hi,
>
> In theory, you can do it both ways. Depending on your situation, you will
> have to assess which approach will be the best solution.
>
> Regarding the fact that creation of a kbase takes some time, you will
> probably want to avoid doing it multiple times per transaction or, at
> least,
> cache them. Also, when your rules are part of a continupus flow, you
> probably want only 1 kbase.
>
> In your situation, mortgages, I assume your rules are following eachother
> with no or very little interaction from the user. In that case, I think one
> would normally use 1 knowledgebase.
>
> Theoretically, multiple knowledgebases should be used when dealing with
> completely different rulesets, with one ruleset not influencing the other
> (or execution of ruleset one happening in a totally different timeframe as
> to justify the use of another kbase).
>
> I hope this makes it clear.
>
> Regards,
> Frank
>
>
> ismaximum wrote:
> >
> > Hi
> >
> > I am new to Drools and just want to start developing our app with Drools.
> > I have some questions regarding KnowledgeBase instantiation.
> >
> > Can we create a single instance of KB across the application and use it
> to
> > create any stateful or stateless session?
> > In this case, do we need to add all the rules available in our
> application
> > or we need to create one instance for each set of rules? In other words,
> > consider we have many rules including mortgage calculation/ validation,
> > auditing process, interest rate calculation and many others, do we need
> to
> > create one instance of KB for each rule or just one KB and add all the
> > rules to it?
> >
>
>
> --
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