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Hi ,<br>
<br>
Thanks for the reply , the code that you gave works , but what I wanted
to achieve is to pack it in one "statement" , i.e :<br>
<br>
Event(this after $b && $b after $a)<br>
<br>
that's because I am not limited to the sequence operator , for example
when I want to make a disjunction rule :<br>
Cmplx1 :- a OR b<br>
<br>
I can't separate the events , but I must write them packed like this ::<br>
<br>
Event(this after $b || $b after this)<br>
<br>
One more question :<br>
I assume that the relation between the different statements in a rule
is normal conjunction , i.e :<br>
<br>
rule "some rule"<br>
when<br>
a : ...<br>
b : ...<br>
c : ...<br>
then<br>
trigger action "act"<br>
end <br>
<br>
would be equivalent to :: <br>
act :- a,b,c .<br>
<br>
I hope I am correct ?<br>
<br>
Thanks for the help<br>
Khalil Hafsi<br>
<br>
Edson Tirelli wrote:
<blockquote
cite="mid:e6dd5ba30908240644s22b92e22pd733e5f4a69522e9@mail.gmail.com"
type="cite"><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
moz-do-not-send="true" 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 moz-do-not-send="true"
href="http://www.jboss.com">www.jboss.com</a><br>
<pre wrap=""><hr size="4" width="90%">
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</blockquote>
<br>
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