First, you don't need to compie the change set by your self the agent will do that in applyChangeSet() method.<div>Some questions that could help to figure out the problem:</div><div><ol><li>Which version of drools are you using? (I assume >= 5.1M1)</li>
<li>Do you have any stacktrace/log file?</li><li>Is your cange set pointing to DRL resources. If so, the agent internally creates kbuilders to compile them. You could have class loaders problems there. By default the agent logs everything to System.err. Could you post the output here?</li>
</ol>Best, <br><br><div class="gmail_quote">On Fri, Jun 25, 2010 at 9:59 AM, mmarmol <span dir="ltr"><<a href="mailto:marcelo.marmol@gmail.com">marcelo.marmol@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br>
Hi, I have managed to install Drools-core and Drools-compiler in my Equinox<br>
osgi environment, I can compile rules and execute them just fine, I was just<br>
wandering how to configure a KnowledgeAgent using<br>
KnowledgeBuilderFactoryService and KnowledgeBaseFactoryService. I managed to<br>
configure one but i am not able to reload rules when they change at runtime.<br>
I have started ResourceChangeScannerService and<br>
ResourceChangeNotifierService, changeset related to the rules file gets read<br>
but no change gets implemented. An idea?<br>
<br>
<br>
Here is the code:<br>
<br>
ResourceFactory.getResourceChangeScannerService().start();<br>
ResourceFactory.getResourceChangeNotifierService().start();<br>
<br>
ServiceReference serviceRef = bc<br>
.getServiceReference(ServiceRegistry.class.getName());<br>
ServiceRegistry registry = (ServiceRegistry) bc.getService(serviceRef);<br>
<br>
KnowledgeBuilderFactoryService knowledgeBuilderFactoryService = registry<br>
.get(KnowledgeBuilderFactoryService.class);<br>
<br>
KnowledgeBaseFactoryService knowledgeBaseFactoryService = registry<br>
.get(KnowledgeBaseFactoryService.class);<br>
ResourceFactoryService resourceFactoryService = registry<br>
.get(ResourceFactoryService.class);<br>
<br>
KnowledgeBuilderConfiguration kbConf = knowledgeBuilderFactoryService<br>
.newKnowledgeBuilderConfiguration(null, getClass()<br>
.getClassLoader());<br>
<br>
KnowledgeBuilder kbuilder = knowledgeBuilderFactoryService<br>
.newKnowledgeBuilder(kbConf);<br>
ResourceFactoryService resource = resourceFactoryService;<br>
kbuilder.add(resource.newFileSystemResource(filePath),<br>
ResourceType.CHANGE_SET);<br>
<br>
if (kbuilder.hasErrors()) {<br>
System.out.println(kbuilder.getErrors());<br>
throw new RuntimeException(kbuilder.getErrors().toString());<br>
}<br>
<br>
KnowledgeBaseConfiguration kbaseConf = knowledgeBaseFactoryService<br>
.newKnowledgeBaseConfiguration(null, getClass()<br>
.getClassLoader());<br>
<br>
KnowledgeBase kbase = knowledgeBaseFactoryService<br>
.newKnowledgeBase(kbaseConf);<br>
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());<br>
<br>
KnowledgeAgentConfiguration aconf =<br>
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();<br>
aconf.setProperty("drools.agent.scanDirectories", "true");<br>
aconf.setProperty("drools.agent.scanResources", "true");<br>
aconf.setProperty("drools.agent.newInstance", "false");<br>
<br>
kagent = KnowledgeAgentFactory.newKnowledgeAgent( "CoreDroolsAgent",kbase,<br>
aconf);<br>
kagent.applyChangeSet(resource.newFileSystemResource(filePath));<br>
<br>
Thanks in advance!<br>
<br>
Cheers<br>
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