<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Op 20/09/2013 21:23, Davide Sottara
schreef:<br>
</div>
<blockquote cite="mid:523CA0A3.50802@gmail.com" type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<div class="moz-cite-prefix">Brecht, thanks for reporting this,
but I don't think these are bugs.<br>
<br>
</div>
</blockquote>
Thanks for the explanations. I tested it to be sure and it works as
expected. The "drools.agent.useKBaseClassLoaderForCompiling" option
indeed fixes the issue unless the agent detects several files at the
same time in which case they are processed in alphabetical order
(which is to be expected). In that case my preprocessing hack is
still useful. The globals are just something different than what I
expected globals to be. <br>
<br>
Thank you very much for the support.<br>
<blockquote cite="mid:523CA0A3.50802@gmail.com" type="cite">
<div class="moz-cite-prefix"> 1) In order to set the value of a
global from a rule's RHS, you have to do somehting like this<br>
<br>
drools.getKnowledgeRuntime().setGlobal( "RULES_MATCHED",
newValue );<br>
<br>
The reason is that the rule's RHS sees a reference to the
original global... a local variable with the<br>
same name initialized appropriately. Something like
RULES_MATCHED = 0 will only change the local<br>
reference, not modify the global.<br>
<br>
2) The KnowledgeAgent supports declared types incrementally..
(Esteban and I spent a lot of time to make<br>
that work), but you have to set a flag in the KA's
configuration:<br>
<br>
KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();<br>
aconf.setProperty(
"drools.agent.useKBaseClassLoaderForCompiling", true );<br>
<br>
The "incremental" mode (newInstance=false) only ensures that the
existing KnowlegeBase is updated,<br>
tue "useKBaseClassLoaderForCompiling" will ALSO make sure that,
as the new resources are compiled<br>
by a KnowledgeBuilder, this is initialized with the KB's
classloader, which has the classes for the declared types.<br>
<br>
3) I have proposed a fix for the issue you reported the other
day... actually two in one. <br>
- 3a ) Runtime exceptions will be catched,<br>
- 3b ) you **WILL NOT** be able to use primitive types with
globals anymore.. (which would result in a RTE anyway)<br>
<br>
Hope this help<br>
Best<br>
Davide<br>
<br>
<br>
<br>
On 09/20/2013 02:18 AM, De Rooms Brecht wrote:<br>
</div>
<blockquote cite="mid:523C12DF.2060000@vub.ac.be" type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
Dear Drools Users,<br>
<br>
I am building a network server for drools since the existing
drools-server did not meet my requirements. Since I recently
found a bug and find the people here very helpful I'll try to
explain another issue I encountered in the hope that it improves
drools 5.6 and 6.0.<br>
I noticed that declared types and globals don't seem to be found
when you access them from a rule that was written in a different
file. For the declared types I hacked around this issue by
preprocessing the files and placing every declared type at the
top of each file that needs it. For globals this is of course
not possible. <br>
<br>
An example is shown below. File1 is loaded from the moment the
agent starts up, then file2 is loaded.<br>
There is a difference when the knowledgeAgent detects the two
files at once or one by one. In this case the KnowledgeAgent
detects one file and then a few minutes later the other file and
compiles them completely separately.<br>
The idea is to keep how many rules are matched of a certain type
in a global.<br>
<br>
<b><small> FILE1: global_rules_matches.drl<br>
----------------------------------------------<br>
package ellipsoidfacts<br>
<br>
// declare<br>
global Integer RULES_MATCHED;<br>
<br>
// initialize global<br>
rule "initRULESMATCHED"<br>
salience 999<br>
when<br>
<br>
then<br>
RULES_MATCHED = 0;<br>
end</small></b><br>
<br>
<b><small> FILE2: testrule.drl<br>
----------------------------------------------<br>
package ellipsoidfacts<br>
<br>
rule "Gesture_lefthook"<br>
when <br>
<br>
// ... any precedent rules ... <br>
<br>
then<br>
System.out.println("matched gesture: lefthook"+
RULES_MATCHED);<br>
end</small></b><br>
<br>
In this particular case, my rule is not matched. I load these
rules using a changeset xml, my knowledgeagent is set to
incremental (but either doesnt work).<br>
The same happens when I declare types in FILE1 and use them in
FILE2. When I write the type declaration in both files it works
perfectly. <br>
Being the same package I assumed that these two scenarios should
work. Am I doing something wrong or is the agent not supposed to
work like this and should a package be in one file?<br>
<br>
Kind Regards,<br>
De Rooms Brecht<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
rules-users mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="https://lists.jboss.org/mailman/listinfo/rules-users">https://lists.jboss.org/mailman/listinfo/rules-users</a></pre>
</blockquote>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
rules-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a>
<a class="moz-txt-link-freetext" href="https://lists.jboss.org/mailman/listinfo/rules-users">https://lists.jboss.org/mailman/listinfo/rules-users</a></pre>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Brecht De Rooms
=================================
Phd Student
Vrije Universiteit Brussel
Research Group CISA(WISE) - DINF F.10.707
Department of Computer Science
Pleinlaan 2 - 1050 Brussels - Belgium
Tel. +32-2-629 1103
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:bderooms@vub.ac.be">bderooms@vub.ac.be</a>
Website <a class="moz-txt-link-freetext" href="http://wise.vub.ac.be/brecht-de-rooms">http://wise.vub.ac.be/brecht-de-rooms</a>
=================================
</pre>
</body>
</html>