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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I had been wondering the same thing, so I
finally decided to take a look @ the Drools source. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>These log message are provided by the
SystemEventListener interface. There’s no direct way (that I can see) in
the code to set and enforce an actual “log level” (Someone please
tell me I’m wrong here.. I’d love to do this differently!)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>What you need to do is implement your own
SystemEventListener implementation to override the default one. Before you do
anything meaningful with Drools, you’ll want to override the default by
calling:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
SystemEventListenerFactory.setSystemEventListener(<YOUR
SystemEventListenerImpl>);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Here’s a basic no-op listener:<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>new</span></font></b><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> SystemEventListener () {</span></font><font size=2
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> debug(String
arg0) { }</span></font><font size=2 face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> debug(String
arg0, Object arg1) {}</span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
exception(Throwable arg0) {}</span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> exception(String
arg0, Throwable arg1) {}</span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> info(String
arg0) {}</span></font><font size=2 face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> info(String
arg0, Object arg1) {}</span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> warning(String
arg0) {}</span></font><font size=2 face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#7F0055;font-weight:bold'>public</span></font></b><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><b><font size=2 color="#7f0055" face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:#7F0055;font-weight:
bold'>void</span></font></b><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> warning(String
arg0, Object arg1) {}</span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> </span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> };</span></font><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In reality what you probably want to do is
hook in your application’s logger here so it will respect the same log
levels the rest of your application runs under.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Macon<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
rules-users-bounces@lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Andrew Waterman<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, September 10, 2009
6:30 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Rules Users List<br>
<b><span style='font-weight:bold'>Subject:</span></b> [rules-users]
KnowledgeAgent Log Level</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi,<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I'm wondering if there is a way to manipulate the log level for the
KnowledgeAgent. Currently, I'm getting dumps to the console that I'd like
to control:<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:371:info] KnowledgAgent
applying ChangeSet</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:371:debug]
KnowledgeAgent subscribing to resource=[ClassPathResource
path='mx/ecosur/multigame/impl/manantiales.drl']</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:371:debug]
ResourceChangeNotification subscribing listener=org.drools.agent.impl.KnowledgeAgentImpl@3ebfd8
to resource=[ClassPathResource path='mx/ecosur/multigame/impl/manantiales.drl']</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:372:debug]
KnowledgeAgent ChangeSet requires KnowledgeBuilder</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:372:debug]
KnowledgeAgent rebuilding KnowledgeBase using ChangeSet</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:373:debug]
KnowledgeAgent building resource=[ClassPathResource
path='mx/ecosur/multigame/impl/manantiales.drl']</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>[2009:09:253 17:09:420:info]
KnowledgeAgent new KnowledgeBase now built and in use</span></font><o:p></o:p></p>
</div>
</blockquote>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks!<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>best wishes,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Andrew<o:p></o:p></span></font></p>
<span style='orphans: 2;widows: 2;-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:
0px'>
<div apple-content-edited=true>
<div style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'>
<div style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'>---------------------------------<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'>Andrew Waterman<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><st1:City w:st="on"><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'>San Cristóbal</span></font></st1:City><font
size=1 color=black face=Helvetica><span style='font-size:9.0pt;font-family:
Helvetica;color:black'> de las <st1:place w:st="on"><st1:City w:st="on">Casas</st1:City>,
<st1:State w:st="on">Chiapas</st1:State>, <st1:country-region w:st="on">Mexico</st1:country-region></st1:place><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'></span><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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