[rules-users] Shadow fax

[Mark Proctor]

On 24 May 2013, at 08:51, ronan.quintin <ronan.quintin at gmail.com> wrote:

> Hello,
> 
> First of all i have to appologise for this horrible joke, but i think you
> understand that i'm interrested in shadow facts. 
> I read that theses lazy facts proxy were introduced in Drools 4 in order to
> make the rule engine/working memory consistent. I have some questions about
> the general implentation of shadow facts in drools 5.4 :
They did exist in 4, we had a similar engine to Jess then. 
http://blog.athico.com/2008/02/shadow-facts-what-you-always-wanted-to.html

They are no longer needed in 5, due to changes in our rete algorithm. See Assymetrical Rete algorithm:
http://blog.athico.com/2008/07/drools-50-m1-new-and-noteworthy.html
http://blog.athico.com/2008/10/symmetrical-and-asymmetrical-rete.html
http://blog.athico.com/2010/01/rete-and-true-modify.html

> - Did the shadow facts been implemented since version 4, or was it earlyier? 
> - Are the shadow facts still implemented in drools 5.4 final? 
> - How the mapping between the fact fields and the proxy fields is
> implemented ? By this i want to know all fields are copy when the fact is
> insert into the session. 
> - Is there the possibility to disable shadow facts ?
Don't need to, they are gone.
> 
> 
> You have to know that we get the knowledgeBase through a knowledgeAgent
> which 
> 
> Thank you.
> 
> 
> 
> --
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