2011/5/19 Abhay B. Chaware <span dir="ltr"><<a href="mailto:Abhay.Chaware@kpitcummins.com">Abhay.Chaware@kpitcummins.com</a>></span><br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;">Correct. But does it then internally build
the DRL into binary/compiled format and then uses it for updating knowledge
base ?</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p></div></div></blockquote><div><br>Yes - Builder's output is always the same.<br>
-W<br><br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div link="blue" vlink="blue" lang="EN-US"><div>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>
[mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>] <b><span style="font-weight: bold;">On
Behalf Of </span></b>Wolfgang Laun<br>
<b><span style="font-weight: bold;">Sent:</span></b> Thursday, May 19,
2011 11:59 AM<div><div></div><div class="h5"><br>
<b><span style="font-weight: bold;">To:</span></b> Rules
Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] Drools
and threads</div></div></span></font></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">You can feed a
KnowledgeBuilder with a number of data formats,
DRL being just one of them. The full standard procedurefor building is to add
one or more resources to the builder (indicating its type), check for errors and create a KnowledgeBase; then
proceed with a session, etc. <br>
<br>
-W<br>
<br>
</span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">2011/5/19 Abhay B. Chaware <<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a>></span></font></p>
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<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;">Little confused about the third question I had, about rules compilation. I now know that rules are
to be compiled. When I use Guvnor,
I have to package the rules ( this is where they are compiled into binary
format ) and download the package file and feed it into the production
memory / knowledge base using changesets/agents. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;">But I have also seen examples of drools and also created a few ones
where I build the eclipse project and package the entire app as webapp ( .war )
and the rules file is in the classes/lib directory as a .drl file. ( uncompiled
). And it still works ! Does the drools runtime compile it at
runtime ? and then uses it or what ? </span></font></p>
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<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;">Regards,</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 11pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2" color="navy"><span style="font-size: 10pt; font-family: Arial; color: navy;">Abhay Chaware</span></font></p>
<p class="MsoNormal"><font face="Arial" size="1" color="navy"><span style="font-size: 7.5pt; font-family: Arial; color: navy;">Sr. Designer | KPIT Cummins Infosystems Ltd | Board: +91 020 6652
5000 | Extn: 2989 | <a href="mailto:abhay.chaware@kpitcummins.com" target="_blank">abhay.chaware@kpitcummins.com</a> |<a href="http://www.kpitcummins.com" target="_blank">www.kpitcummins.com</a> </span></font></p>
<p class="MsoNormal"><font face="Webdings" size="5" color="green"><span style="font-size: 18pt; font-family: Webdings; color: green;">P</span></font><font face="Webdings" size="2" color="black"><span style="font-size: 11pt; font-family: Webdings; color: black;"> </span></font><font face="Tahoma" size="1" color="green"><span style="font-size: 7.5pt; font-family: Tahoma; color: green;">Please consider the environment before printing this e-mail</span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a> [mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>]
<b><span style="font-weight: bold;">On Behalf Of </span></b>Wolfgang Laun<br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, May 17,
2011 3:31 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Rules
Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] Drools
and threads</span></font></p>
</div>
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<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">2011/5/17 Abhay B.
Chaware <<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a>></span></font></p>
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<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Hi</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I have few
questions about Drools.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Are rules
compiled, partially compiled or
interpreted ?</span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
Rules are indeed compiled, but any
system where the order of execution<br>
is so highly dynamic has to do some operation in an interpretative mode.<br>
<br>
</span></font></p>
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<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">When I call
fireAllRules(), does it ( or can it
) create a new thread that runs parallely or the operation is sequential and
the caller program HAS TO wait till all rules execution is done ?</span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
No special thread is created. fireAllRules() returns when no more rule
activations are to be "fired".<br>
</span></font></p>
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<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Also, How is the application data integrity guarantied?
E.g. what happens when some of the facts are changed in middle of rules being
executed .. ? what should happen ?</span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
When a rule activation is executed,
the code of the consequence frequently changes one or more facts. This results
in reevaluations of rule conditions,
etc. This is just the way Drools works.<br>
<br>
-W<br>
<br>
<br>
</span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">-abhay</span></font></p>
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