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<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Wolfgang,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>thank you so much for your remarks! It’s really
interesting:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-US style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'>I tried the approach to
update the parent whenever a child is modified before – without any
success<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-US style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'>Now I changed my rule to your
(definitely much better) suggestion – and it works!<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>So despite of the fact that I’m really happy to have this
one solved I would really be interested in what the problem with the forall is.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Is it possible that a forall statement creates some kind of copy
or “summary” of the facts to be evaluated and is checked only once?
Like an eval statement?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Anyways – thank you so much for your help!<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Best regards<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Georg<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> rules-users-bounces@lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] <b>Im Auftrag von </b>Wolfgang
Laun<br>
<b>Gesendet:</b> Montag, 2. August 2010 12:15<br>
<b>An:</b> Rules Users List<br>
<b>Betreff:</b> Re: [rules-users] Drools + EMF + CDO<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Several remarks:<br>
(1) Make sure that a parent is asserted after all of its children. Otherwise
initial evaluation will not comprise the entire children's list.<br>
(2) After changing a child's state, update the parent.<br>
(3) The rule as you have it now is somewhat circumstantial. A simpler approach
would be<br>
<br>
rule NoUpChild<br>
when<br>
$p : Device( $children : <span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:black'>eContents</span>,
<span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>eContents</span>.size
> 0 )<br>
not( Device( state == "UP" ) from $children )<br>
then<br>
System.out.println( $p.getId() + ": no child up"
);<br>
end<br>
<br>
(4) If you have a "parent" field, this could even be written:<br>
<br>
rule NoUpChild<br>
when<br>
$p : Device( children.size > 0 )<br>
not( Device( parent == $p, state == "UP" ) )<br>
then<br>
System.out.println( $p.getId() + ": no child up"
);<br>
end<br>
<br>
-W<br>
<br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>2010/8/2 Georg Maier <<a href="mailto:Georg.Maier@cjt.de">Georg.Maier@cjt.de</a>><o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi,<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>I’m trying to figure out an issue for three days now and
I’m getting kind of desperate, so I hope someone can help.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>I’m using Drools in combination with an EMF model which is
modeling a computer network. On init, I read the whole structure of the model
and insert all elements into the working memory. Some of the entities share the
super class “Device” which has an attribute “state”.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Now I’m having the following rule to change an attribute of
one of the model entities:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#960000'>rule</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'> </span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:green'>"Set
received status to model"</span><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>when</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$event : SomeEvent ( </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$hostname : hostname,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$hoststate : hoststate,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$timestamp : timestamp</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$device : Device (</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
name == $hostname</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>then</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>modify</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'>($device) {</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
setState($hoststate);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
}</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
db.commit(</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>false</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'>);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>retract</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'>($event);
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
System.err.println(</span><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";color:green'>"Set status of "</span><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:black'> + $device + </span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:green'>"
to "</span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:black'> + $hoststate);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;font-family:"Courier New";color:#960000'>end</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>… which works perfectly fine. Anyway, what I want to do in
this test case is to <b>react whenever all child devices of a mutual parent
device</b> (e.g. hosts on one switch) are no longer reachable. I thought of a
rule like the following:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#960000'>rule</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'> </span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:green'>"Parent
Children Test"</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>when</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$parent : Device (</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$children : eContents,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
eContents.size > 0</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>forall</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'> (</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
$child : Device (</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>state
== "DOWN"</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
) </span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>from</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'> $children</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><b><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#960000'>then</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:black'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>
</span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:olive'>…</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#960000'>end</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#960000'> </span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>… which by the way worked perfectly fine as long as I was not
using objects from a model. My first idea was that for some strange reason the
object might get copied so that I actually would have two different references
after modifying it, but this is not the case. When I initialize the rule base
with the circumstances that the second rule would fire, it really does. It just
seems as it would not being evaluated after changing the attribute, but this is
not the case either! So all I can think of is some strange caching, maybe in
combination with the </span><b><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";color:#960000'>forall </span></b><span lang=EN-US>statement?
Maybe someone has some experience when using Drools with EMF + CDO and
experienced as similar issue? </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Any help would be very very very much appreciated! </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt'>Thanks in advance</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;color:#888888'>Georg</span><span
style='color:#888888'><o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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