Hi Max,<br><br>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.<br>
<br>Once you have a knowledge base, any number of sessions can be started. Make sure to call dispose() to free (stateful) session resources.<br><br>-W<br><br><br><div class="gmail_quote">On 14 April 2011 09:13, FrankVhh <span dir="ltr"><<a href="mailto:frank.vanhoenshoven@agserv.eu">frank.vanhoenshoven@agserv.eu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br>
<br>
In theory, you can do it both ways. Depending on your situation, you will<br>
have to assess which approach will be the best solution.<br>
<br>
Regarding the fact that creation of a kbase takes some time, you will<br>
probably want to avoid doing it multiple times per transaction or, at least,<br>
cache them. Also, when your rules are part of a continupus flow, you<br>
probably want only 1 kbase.<br>
<br>
In your situation, mortgages, I assume your rules are following eachother<br>
with no or very little interaction from the user. In that case, I think one<br>
would normally use 1 knowledgebase.<br>
<br>
Theoretically, multiple knowledgebases should be used when dealing with<br>
completely different rulesets, with one ruleset not influencing the other<br>
(or execution of ruleset one happening in a totally different timeframe as<br>
to justify the use of another kbase).<br>
<br>
I hope this makes it clear.<br>
<br>
Regards,<br>
Frank<br>
<br>
<br>
ismaximum wrote:<br>
><br>
> Hi<br>
><br>
> I am new to Drools and just want to start developing our app with Drools.<br>
> I have some questions regarding KnowledgeBase instantiation.<br>
><br>
> Can we create a single instance of KB across the application and use it to<br>
> create any stateful or stateless session?<br>
> In this case, do we need to add all the rules available in our application<br>
> or we need to create one instance for each set of rules? In other words,<br>
> consider we have many rules including mortgage calculation/ validation,<br>
> auditing process, interest rate calculation and many others, do we need to<br>
> create one instance of KB for each rule or just one KB and add all the<br>
> rules to it?<br>
><br>
<font color="#888888"><br>
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