[rules-users] How to make the working memory "clean"?

[Wolfgang Laun]

On 1 March 2012 16:21, shawn <youngxiao121 at 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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