Please note that the following line in the example will configure the ResourceScanner to scan all the resources every 2 second! I don't think this is what you want!<div><br><div><i>sconf.setProperty("drools.resource.scanner.interval", "2");</i></div>
<div><br><br></div><div><br><div class="gmail_quote">On Tue, May 11, 2010 at 1:25 PM, Esteban Aliverti <span dir="ltr"><<a href="mailto:esteban.aliverti@gmail.com">esteban.aliverti@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi John,<div>Knowledge Agent is indeed the replacement of RuleAgent. It maintains a kbase and update it using change sets. A change set is an xml that list all the resources that the agent should take care of. In conjunction with ResouceChangeNotifier and ResourceChangeScanner you can use a knowledge agent to use packages exposed using guvnor.</div>
<div>Basically, the scanner will scan periodically a resource and find modifications. Whenever the resource changed, the scanner creates a change set and uses the Notifier to let the kagent know about the change.</div><div>
The thing is that you need to setup an initial change set, so the agent can start working. Here is one way to do that:</div><div><br></div><div> //Scanner and notifier work as services. They must be started though</div>
<div><div> ResourceFactory.getResourceChangeNotifierService().start();</div><div> ResourceFactory.getResourceChangeScannerService().start();</div><div><br></div><div><div> String xml = "";</div>
<div><span style="white-space:pre"> </span>xml += "<change-set xmlns='<a href="http://drools.org/drools-5.0/change-set" target="_blank">http://drools.org/drools-5.0/change-set</a>'";</div><div>
<span style="white-space:pre"> </span>xml += " xmlns:xs='<a href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a>'";</div><div><span style="white-space:pre"> </span>xml += " xs:schemaLocation='<a href="http://drools.org/drools-5.0/change-set" target="_blank">http://drools.org/drools-5.0/change-set</a> drools-change-set-5.0.xsd' >";</div>
<div><span style="white-space:pre"> </span>xml += " <add> ";</div><div><span style="white-space:pre"> </span>xml += " <resource source='<a href="http://localhost:9000/rule1.drl" target="_blank">http://localhost:9000/rule1.drl</a>' type='DRL' />";</div>
<div><span style="white-space:pre"> </span>xml += " <resource source='<a href="http://localhost:9000/rule2.drl" target="_blank">http://localhost:9000/rule2.drl</a>' type='DRL' />";</div>
<div><span style="white-space:pre"> </span>xml += " </add> ";</div><div><span style="white-space:pre"> </span>xml += "</change-set>";</div>
<div><span style="white-space:pre"> </span>File fxml = fileManager.newFile("changeset.xml");</div><div><span style="white-space:pre"> </span>output = new BufferedWriter(new FileWriter(fxml));</div>
<div><span style="white-space:pre"> </span>output.write(xml);</div><div><span style="white-space:pre"> </span>output.close();</div><div><br></div><div><span style="white-space:pre"> </span>KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();</div>
<div><br></div><div><span style="white-space:pre"> </span>ResourceChangeScannerConfiguration sconf = ResourceFactory</div><div><span style="white-space:pre"> </span>.getResourceChangeScannerService()</div>
<div><span style="white-space:pre"> </span>.newResourceChangeScannerConfiguration();</div><div><span style="white-space:pre"> </span>sconf.setProperty("drools.resource.scanner.interval", "2");</div>
<div><span style="white-space:pre"> </span>ResourceFactory.getResourceChangeScannerService().configure(sconf);</div><div><br></div><div><span style="white-space:pre"> </span>KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory</div>
<div><span style="white-space:pre"> </span>.newKnowledgeAgentConfiguration();</div><div><span style="white-space:pre"> </span>aconf.setProperty("drools.agent.scanDirectories", "true");</div>
<div><span style="white-space:pre"> </span>aconf.setProperty("drools.agent.scanResources", "true");</div><div><span style="white-space:pre"> </span>aconf.setProperty("drools.agent.newInstance", "true");</div>
<div><span style="white-space:pre"> </span>KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent(</div><div><span style="white-space:pre"> </span>"test agent", kbase, aconf);</div>
<div><br></div><div><span style="white-space:pre"> </span>assertEquals("test agent", kagent.getName());</div><div><br></div><div><span style="white-space:pre"> </span>kagent.applyChangeSet(ResourceFactory.newUrlResource(fxml.toURI()</div>
<div><span style="white-space:pre"> </span>.toURL()));</div><div><br></div><div><span style="white-space:pre"> </span>StatefulKnowledgeSession ksession = kagent.getKnowledgeBase()</div>
<div><span style="white-space:pre"> </span>.newStatefulKnowledgeSession();</div></div><div><br></div><div><br></div><div>I took this code from kagent's test cases.</div><div>You can also create a new ChangeSetImpl by hand instead of use an xml file.</div>
<div><br></div><div>I hope you find this helpful.</div><div>If you have any other question, or you have doubts about this, feel free to ask!</div><div><br></div><div>Best,</div><br><div class="gmail_quote">2010/5/11 John Peterson <span dir="ltr"><<a href="mailto:john.peterson.gv3k@statefarm.com" target="_blank">john.peterson.gv3k@statefarm.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div class="h5">
<div>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Hi all,</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">I</font></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">m trying to get the</font></span><span lang="en-us"> <font face="Calibri">sample</font></span><span lang="en-us"><font face="Calibri"></font></span><span lang="en-us"> <font face="Calibri">code in the Drools 5.0.1</font></span><span lang="en-us"><font face="Calibri"> User Manual</font></span><span lang="en-us"><font face="Calibri"> to work locally for a Knowledge Agent, but I</font></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">m missing</font><font face="Calibri"> some info (from my perspective) to get it to run.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Question #1:</font></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">From the</font> <font face="Calibri">User Manual (3.2.6):</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">KnowledgeAgent kagent = </font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"> KnowledgeAgentFactory.newKnowledgeAgent( "MyAgent" );</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">kagent.applyChangeSet( ResourceFactory.newUrlResource( url ) );</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">KnowledgeBase kbase = kagent.getKnowledgeBase();</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">In the</font></span><span lang="en-us"> <font face="Calibri">third</font></span><span lang="en-us"><font face="Calibri"> line, what is</font></span><span lang="en-us"> <font face="Calibri">“</font></span><span lang="en-us"><font face="Calibri">url</font></span><span lang="en-us"><font face="Calibri">”</font></span><span lang="en-us"><font face="Calibri"> and how is it defined in the java code?</font></span><span lang="en-us"><font face="Calibri"> I don</font></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">t know what to</font></span><span lang="en-us"> <font face="Calibri">set up here to make it work.</font></span><span lang="en-us"><font face="Calibri"> I</font></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">ve found this same</font> <font face="Calibri">code on</font></span><span lang="en-us"> <font face="Calibri">multiple</font></span><span lang="en-us"><font face="Calibri"> sites, but no answer to the question.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Question #2:</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">How do I set up a Change Set XML file? I see the XML, but I don</font></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">t know where to put the fi</font><font face="Calibri">le and how to link it into the code.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Question #3:</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Does KnowledgeAgent replace RuleAgent for invoking Guvnor</font></span><span lang="en-us">-<font face="Calibri">deployed</font></span><span lang="en-us"> <font face="Calibri">packages in 5.0.1? If so, how do you speci</font><font face="Calibri">fy the</font></span><span lang="en-us"> <font face="Calibri">url of the deployed package from Guvnor?</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Sorry if my questions are ignorant. I</font></span><span lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">ve been trying to find these answers for several days and</font> <font face="Calibri">hit the point where I needed to get some help.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Thanks,</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">John</font></span><span lang="en-us"></span></p>
</div>
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<br></div></blockquote></div><br><br clear="all"><br>-- <br>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br><br>Esteban Aliverti<br>
</div>
</blockquote></div><br><br clear="all"><br>-- <br>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br><br>Esteban Aliverti<br>
</div></div>