[rules-users] object creation
Hello
the created OutputObjects should be used by the GUI to be displayed
and only reasonable filled OutputObjects should be displayed.
Furthermore an OutputObject of one type can be input for another rule
to create output of another type.
I'm not sure what's better and easier to handle in my case, lazy
initialisation or insert from outside.
Is there anything more to consider using lazy initialisation?
Regards
Thomas
Any reason you can't assert the OutputObject from outside? (i.e.
before rules fire) You're essentially doing lazy initialization, and
that's always a bit more complex.
--- On Thu, 8/21/08, thomas kukofka <thomaskukofka at web.de> wrote:
From: thomas kukofka <thomaskukofka at web.de>
Subject: [rules-users] object creation
To: "Rules Users List" <rules-users at lists.jboss.org>
Date: Thursday, August 21, 2008, 9:03 AM
Hello,
I have a rule which creates an object in the consequence
part and updates
this object each time teh rule is executed. So the object
has to be created
only the first time.
So I always need two rules, one init rule which creates the
object if it
doesn't exist yet and one if it already exists and it
should only be
updated:
rule "init rule"
when
"condition"
AND
not OutputObject()
then
OutputObject oo = new OutputObject();
insert(oo);
rule "update rule"
when
"condition"
AND
oo: OutputObject()
then
#do something with the object
update(oo);
But is it really neccessary to write an extra rule only to
create the
output-fact initially? Is it possible/good style to make
this in one single
rule?
Appreciate your help.
Regards
Thomas
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