Thanks, I'll try to reproduce it later. Just a couple of side notes..
Given that the rules fire correctly the first time, I would exclude that the
wrong URL is used. The ChangeScanner has a polling interval of **60**
seconds, so
changes may not be immediate. You can configure that interval, though.
In the logs, then, you should see something like :
"ResourceChangeScanner attempt to scan x resources"
(it's a DEBUG level message, you may want to configure log4j accordingly)
x obviously should be greater than 0.
You should then see a message saying that the ResourceChangeScanner
modified/removed/added some resources. If not, it's not picking up the
change..
I'd try forcing a PKG rebuild manually after changing the rules in guvnor.
The changeset.xsd error is just a warning, it won't affect execution.
On 05/02/2013 01:52 AM, riri wrote:
> Here is the code I am using to create the knowledge base, knowledge agent and
> to retrieve the resources:
>
> public static KnowledgeBase createKnowledgeBase(List<DroolsResource>
> resources,
> EventProcessingOption eventProcessingOption)
> {
> KnowledgeBuilder builder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> for (DroolsResource resource : resources)
> {
> logger.info("Resource: " + resource.getType() + ", path
> type="
> + resource.getPathType() + ", path=" +
> resource.getPath());
> switch (resource.getPathType())
> {
> case CLASSPATH:
>
> builder.add(ResourceFactory.newClassPathResource(resource.getPath()),
> resource.getType());
> break;
> case FILE:
>
> builder.add(ResourceFactory.newFileResource(resource.getPath()),
> resource.getType());
> break;
> case URL:
> UrlResource urlResource = (UrlResource)
> ResourceFactory
> .newUrlResource(resource.getPath());
>
> if (resource.getUsername() != null)
> {
> logger.info("Setting authentication for: " +
> resource.getUsername());
> urlResource.setBasicAuthentication("enabled");
> urlResource.setUsername(resource.getUsername());
> urlResource.setPassword(resource.getPassword());
> }
>
> builder.add(urlResource, resource.getType());
> break;
> default:
> throw new IllegalArgumentException(
> "Unable to build this resource path type.");
> }
> }
>
> if (builder.hasErrors()) {
> throw new RuntimeException(builder.getErrors().toString());
> }
>
> KnowledgeBaseConfiguration conf =
> KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> // setting the STREAM option
> conf.setOption(eventProcessingOption);
> // modify the default identity compare mode to equality
> conf.setOption(AssertBehaviorOption.EQUALITY);
>
> KnowledgeBase knowledgeBase =
> KnowledgeBaseFactory.newKnowledgeBase(conf);
> knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages());
>
> return knowledgeBase;
>
> }
>
> public static KnowledgeAgent createKnowledgeAgent(String
> knowledgeAgentName, KnowledgeBase knowledgeBase)
> {
> KnowledgeAgentConfiguration aconf =
> KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
>
> aconf.setProperty("drools.agent.newInstance", "false");
> KnowledgeAgent kagent =
> KnowledgeAgentFactory.newKnowledgeAgent(knowledgeAgentName, knowledgeBase,
> aconf);
>
> ResourceFactory.getResourceChangeScannerService().start();
> ResourceFactory.getResourceChangeNotifierService().start();
>
> return kagent;
> }
>
> public DroolsResource getGuvnorResource(User user)
> {
> String packageName = user.getUsername();
> String guvnorBinaryResourceUrl =
> "http://127.0.0.1:8080/guvnor/rest/packages/"; + packageName + "/binary";
> return new DroolsResource(guvnorBinaryResourceUrl,
> ResourcePathType.URL,
> ResourceType.PKG, credentials.getUserPrincipal().getName(),
> credentials.getPassword());
> }
>
> Where the DroolsResource is a custom class to hold information about a
> resource:
>
> public class DroolsResource
> {
>
> private String path;
> private ResourcePathType pathType;
> private ResourceType type;
> private String username = null;
> private String password = null;
>
> //getters, setters and constructors
> }
>
> To initialize the environement I just call the method to create the
> knowledge base once I have the DroolsResource and then the method to create
> the knowledge agent. Afterwards I create a statefull knowledge session using
> the getKnowledgeBase() of the agent. Would the problem be the Guvnor url
> that I am using? I used the rest version since it sais that it builds the
> package automatically. Or the fact that the url is not in a change-set.xml
> file?
>
> When I run the session the first time (via the fireUntilHalt() in a separate
> thread), rules get executed correctly and I call the halt() method to stop
> it. If I then go and change a rule in the package and restart the session
> then no changes are taken into account. Is the way I am executing the
> sessions a problem? I do not want to recreate a new session every time since
> I would have to reinsert all the facts, so I retrieve the session from the
> knowledge base. I dispose of the session when the application is shut down.
> I am new at this so I might be overlooking an important aspect.
>
> Many thanks for all your help.
>
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Re-rules-users-KnowledgeAgent-to-update-knowledge-base-built-with-Guvnor-pkg-tp4023608p4023624.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
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>
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