Re: [rules-users] Does this work - create new facts in session and add to other facts?
Are your EJB3 beans merely JPA annotated, or state(full\less) session beans?
Drools can create new instance of JPA annotated beans, as there's simply
POJOs however if for stateful\stateless session beans your contain will
handle life-cycle.
The associations you describe are part of your domain model and therefore
Drools rules can achieve what you describe. Here's a simple example:-
rule "ensure all documents have a summary line"
when
$d : Document( )
not Line( document == $d, lineType == "summaryLine" )
then
Line newLine = new Line();
newLine.setDocument( $d );
insert(newLine);
end
Your exact implementation will depend upon your object model.
With kind regards,
Mike
2011/2/19 Thomas Adler <thomas.adler(a)live.com>
Hi,
I am trying to use Drools and I would like to check whether such scenario
could work:
I have facts Document and Line (EJB3 beans, in fact). And Document class
has attribute:
List<Line> lines
So - I would like to pass to stateless session a Document instance
"document" and I would like to write rule, that
1) create some new Lines;
2) calculates total from lines;
3) updates document.total;
4) add new Lines instances, that where created during the rule execution to
document.lines;
And at the end of execution of this session I will like to do some other
things with document and document.lines, e.g. persist in database.
So - can Drools handle such create of associations during the session
execution?
Thanks!
Thomas
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
Attachments:
- attachment.html (text/html — 3.1 KB)