Re: [rules-users] Dynamic refresh from Guvnor in Web Application

OK, got the file-based version (not from Guvnor) running. The problem was that the ResourceChangeScannerService must NOT be started. There is a problem when it tries to load the resource. But starting the ResourceChangeNotifierService ALONE works! See function below. /** * Creates a StatefulKnowledgeSession that uses the specified rules file. * Changes in the rules file are detected on-the-fly (change notification). * <p> * TODO A service is started that detects changes in the rules file. It should be shutdown when an * application terminates. This should be imlemented in a production environment. * * @param pathRulesFile String with the location of the rules file. If your rules file is in a top * directory * (for example src/main/rules), then the path is "rules.drl". If it is in a package * org.somewhere, then the string is "org/somewhere/rules.drl". * @return StatefulKnowledgeSession */ public static StatefulKnowledgeSession createStatefulKnowledgeSessionWithFile(String pathRulesFile) { ResourceFactory.getResourceChangeNotifierService().start(); final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource(pathRulesFile), ResourceType.DRL); final KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (final KnowledgeBuilderError error : errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); final KnowledgeAgentConfiguration knowlegdeAgentConfiguration = KnowledgeAgentFactory .newKnowledgeAgentConfiguration(); // knowlegdeAgentConfiguration.setProperty("drools.agent.scanResources", "true"); // not neeeded // knowlegdeAgentConfiguration.setProperty("drools.agent.scanDirectories", "true"); // not needed knowlegdeAgentConfiguration.setProperty("drools.agent.newInstance", "false"); // required! final KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("From File", kbase, knowlegdeAgentConfiguration); return kagent.getKnowledgeBase().newStatefulKnowledgeSession(); } -- View this message in context: http://drools.46999.n3.nabble.com/Dynamic-refresh-from-Guvnor-in-Web-Appl... Sent from the Drools: User forum mailing list archive at Nabble.com.