Re: [rules-users] Drools fusion how to I catch an Exception

If I have a rule that has an error in it, the error isn't being caught by the compiler and the error doesn't happen as the Object is inserted into the session, it only happens after a time period completes, then Drools silently fails. How can I catch these silent failures. See below for test case. Notice in the After5 rule there is a mistake in the then part. m.status=$m.status; $m doesn't exist. If i change this to $m.status=m.status, the compiler detects the error, but this way of m.status=$m.status is not found. When the rule fires it just dies. I need to be able to catch the Exception somehow and report it.. Any help really appreciated.. Thanks Ric ---------- sample.drl:- ---------- package com.sample import com.sample.DroolsTest.Message; declare Message @role ( event ) end rule "Hello" dialect "mvel" when m : Message( status == Message.HELLO, myMessage : message ) then System.out.println( "Hello added" ); end rule "After5" dialect "mvel" when m : Message( status == Message.HELLO, myMessage : message ) not( Message( status == Message.GOODBYE , this after [0s,5s] m )) then System.out.println( "After5 then start" ); m.status=$m.status; System.out.println( "After5 then stop" ); retract(m); end ---------- DroolsTest.java: ---------- package com.sample; import org.drools.KnowledgeBase; /** * This is a sample class to launch a rule. */ public class DroolsTest { public static final void main(String[] args) { try { // load up the knowledge base KnowledgeBase kbase = readKnowledgeBase(); StatefulKnowledgeSession ksession = kbase .newStatefulKnowledgeSession(); KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory .newFileLogger(ksession, "test"); // go ! Message message = new Message(); message.setMessage("Hello World"); message.setStatus(Message.HELLO); System.out.println("Inserting message"); ksession.insert(message); System.out.println("Fire all rules"); ksession.fireAllRules(); System.out.println("Sleep 10"); Thread.sleep(10000); System.out.println("End sleep"); logger.close(); } catch (Throwable t) { t.printStackTrace(); } } private static KnowledgeBase readKnowledgeBase() throws Exception { KnowledgeBaseConfiguration conf = KnowledgeBaseFactory .newKnowledgeBaseConfiguration(); conf.setOption(EventProcessingOption.STREAM); // STREAM mode as we are // dealing with Events KnowledgeBuilder kbuilder = KnowledgeBuilderFactory .newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource("Sample.drl"), ResourceType.DRL); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error : errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(conf); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); return kbase; } public static class Message { public static final int HELLO = 0; public static final int GOODBYE = 1; private String message; private int status; public String getMessage() { return this.message; } public void setMessage(String message) { this.message = message; } public int getStatus() { return this.status; } public void setStatus(int status) { this.status = status; } } } -- View this message in context: http://drools.46999.n3.nabble.com/Drools-fusion-how-to-I-catch-an-Excepti... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users