Re: [rules-users] How to make the working memory "clean"?
On 1 March 2012 16:21, shawn <youngxiao121(a)hotmail.com> wrote:
I don't understand the garbage collection mechanism in drool,
though I have
read the expert documentation.
There is no specific "garbage collection" by Drools - Java's GC does
the
trick.
1 - how to retract a global variable in drool?
You don't "retract", you can set it to null, same way as set to an
object.
2 - how to retract all the facts that have been inserted into the
working
memory?
Several ways, simple is to use KnowledgeSession's getFactHandles, and
retract them.
Or dispose the entire Session, and create another one, which might be
faster.
If I use halt(), does it retract all facts in the working memory and
stop the all the rules?
No. Yes.
-W
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