Re: [rules-users] Setting Globals inside Rules
You can have a setup rule with high-salience or specific agenda-group (or
whatever other flow control mechanism you want) firing first and setting the
values in its consequence, but you MUST fire this rule before asserting your
facts into the working memory, because I guess you will be using these
globals in the LHS of other rules.
So the code of your application would be like:
* create rulebase
* create session
* set focus on "setup"
* fire setup rule
* assert facts
* fire rules
The setup rule would be like:
rule "setup rule"
agenda-group "setup"
when
then
// set globals like this:
drools.getWorkingMemory().setGlobal( "myGlobal", someValue );
end
[]s
Edson
2008/9/30 Gary Napier <gnapier(a)cis.strath.ac.uk>
Hi all,
I have common code that can run a number of different rule base(s) and so
far each of the different rule bases have utilized common Global variables
(lists of regular expressions and runtime options)
However a new rule base will require additional /different globals to be
set and i do not want to change the code that invokes the engine and
compiles the rule base.
Is it possible, by way of an example, to have a rule execute upon rule base
initialization and populate a series of global variables? Ideally this would
come from a settings config file in the same directory as the
rule .drl files.
Thanks
Gary
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Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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