[rules-users] Alpha Node Sharing Issue

[Mark Proctor]

That does sound like a problem, there should never be any behavioural 
differences between the various performance configurations. We will fix 
it for MR3. Could you open a JIRA for this please.

Mark
Shahad Ahmed wrote:
>  
> I have a question about alpha node sharing in release 4.0MR2. In the 
> API for class RuleBaseConfiguration there is a method to turn alpha 
> node sharing on and off. However, I get some odd behaviour when I turn 
> it off and I was hoping someone can help me understand what's going 
> on. I'll illustrate the behaviour with the two rules "First" and 
> Second" defined below. Both rules work with  a class Customer, 
> which  is a simple object with attribute age.
>  
> rule "First"
> salience 10
>  when
>   c: Customer(age <= 10)
>  then
>   System.out.println("First - Customer age less than 10");
> end
>  
> rule "Second"
> salience 5
>  when
>      c: Customer(age <= 10)
>  then
>   System.out.println("Second - Customer age less than 10");
> end
>  
>  
> In the default case where alpha node sharing is on, I assert a 
> customer with age 5 and fireAllRules to get the following (hopefully, 
> correct) output:
>  
>   First - Customer age less than 10
>   Second - Customer age less than 10
>  
> However, if I set the setShareAlphaNodes(false) to turn off alpha node 
> sharing I get the following output:
>  
>   First - Customer age less than 10
>  
> Reading the manual, I had assumed that the alpha node sharing was just 
> an optimization, and switching it off may be inefficient, but would 
> give the same output for the example rules. Is this correct, or have I 
> missunderstood alpha node sharing. I've tried switching off alpha node 
> sharing both directly via the API method, and using the system 
> property option, but the behaviour is the same in both cases.
>  
> Regards
> Shahad
>  
> ------------------------------------------------------------------------
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20070517/6c7bb4cb/attachment.html