[rules-users] Re: Upgrading from 3.x to 4.0.7

[Knych, Thomas]

Edson -

Thanks, this is EXACTLY what I was looking for...

-tk


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Message: 4
Date: Thu, 13 Nov 2008 09:02:36 -0500
From: "Edson Tirelli" <tirelli at post.com>
Subject: Re: [rules-users] Upgrading from 3.x to 4.0.7
To: "Rules Users List" <rules-users at lists.jboss.org>
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	<e6dd5ba30811130602i23247e76ub235a3557818121 at mail.gmail.com>
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   Following API call (or equivalent property conf) will make Drools 4
behave like Drools 3.

   RuleBaseConfiguration.setRemoveIdentities( true );

   []s
   Edson

2008/11/12 Knych, Thomas <thomas.knych at citi.com>

> Hi -
>
> I'm upgrading a large base of rules from 3.x to 4.0.7. However there 
> seem to be a few semantic differences. I have rules like the below in 
> a few places:
>
> rule "All items should have a unique external id"
>      when
>                new_item : Item( exId : externalId )
>                    old_item : Item( externalId == exId )
>        then
>                LOG.warn( "DUPE Detected: new:" +  new_item + " old:" +

> old_item );
>                retract( new_item );
> end
>
> And this all worked fine because 3.x would never assign the same 
> object to both new_item and old_item. I know my new/old seem arbitary 
> - but I'm just getting down to the minimal reproducing case. 4.x now 
> will assign one instance of an object to both new_item and old_item. 
> Is there any way to disable this behaviour?
>
>
> thanks,
> -Tom
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
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>



--
 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com
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