<br> Not sure what is the problem you see... <br><br>$a : Event()<br>$b : Event( this after $a )<br>$c : Event( this after $b )<br><br> []s<br> Edson<br><br><div class="gmail_quote">2009/8/24 Ahmed Hafsi <span dir="ltr"><<a href="mailto:hafsi@fzi.de">hafsi@fzi.de</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi guys ,<br>
<br>
I am using the lastest version of DROOLS , i.e 5.0 , I am trying to achieve<br>
forward chaining with the new features of Fusion<br>
I was looking for examples about the different operators and how to make use<br>
of them but the broker example does not mention in it's DRL file any time<br>
related operators , i.e after , meets ...<br>
I would be grateful if you guys provide me with a simple example of forward<br>
chaining (sequence)<br>
My goal to achieve is to implement something like this :<br>
CmplxEvent :- a and then b and then c<br>
<br>
my drools rule is :<br>
<br>
rule "cmplx0"<br>
when<br>
$a : Event()<br>
$b : Event()<br>
Event(this after $b && $b after $a)<br>
then<br>
//whatever<br>
end<br>
<br>
however this does not work , it complains about "unable to create field<br>
exatractor"<br>
Event is an event that I have declared using declare Event and then the<br>
metadata @event as described in the docs.<br>
<br>
<br>
Thanks for help.<br>
Khalil Hafsi<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss by Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a><br>