Re: [rules-users] Insert new facts in WorkingMemory event handler
Hi,
Yes, I see what you mean! That's why, before starting, I wanted to make
sure that I was not completly mistaken ;-).
Please find my answers below.
Bruno.
Gabor Szokoli a écrit :
That looks like a drools retelling of the chicken and egg problem to
me: how do you intend to insert new Instances or Types ?
Yes, I must admit I've had the same feeling too :-).
I have an XML containing those Instances (many) and Types (few and
"unique"), all of them being XML elements :
<type id="1"/>
<type id="2"/>
<instance typeRefid="1" />
<instance typeRefid="1" />
<instance typeRefid="2" />
<instance typeRefid="2" />
<instance typeRefid="2" />
and I simply plan to read my XML and add the corresponding objects into
the session, then to fire the rules.
>From the logical point of view, why do you need to retract
unreferenced facts? Do you see performance issues from too many facts?
Well... I wanted to delegate the whole "logic" to Drools and I
imagined
that I could "listen" to Drools' WorkingMemory's retraction events in
order to remove the corresponding elements from the input XML.
Bruno.