Re: [rules-users] drools quirks

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 maybe now would be a good time for some code. Here is how I am executing the rules against the object: KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newByteArrayResource(ruledata),ResourceType.DRL ); if ( kbuilder.hasErrors() ) { System.err.println( kbuilder.getErrors().toString() ); } kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession(); ksession.execute(document); Here is the rule: package sample1 import sample1.bean.EventRulesDocument; import sample1.bean.Transaction; import java.util.Date; rule "Standard processing rule" when $doc : EventRulesDocument( ruleRun == false && # <<< Wolfgang event != null && event.eventType.eventCode == "testevent" ) then Transaction t = new Transaction(); t.setEvent($doc.getEvent()); t.setCategory($doc.getEvent().getEventType().getEventCode()); t.setTransactionAmount($doc.getEvent().getEventAmount()); t.setCreateTs(new Date()); t.setUsername($doc.getEvent().getCreateUsername()); modify( $doc ) {setRuleRun(true)}; # Wolfgang <<<<<< modify( $doc ) {addSaveTransaction(t)} ; end If I take out the 2 lines marked "Wolfgang", the ksession never returns from the execute() method. Additionally If any code in the world can be executed in the RHS, then why shouldn't I just use groovy as my rule language? At least then, I can write math like such: def num1=95; def num2=90; def num3=num2/num1; and all of the math is done with big decimal objects. IF there is no restriction on what can be done in the RHS what is the advantage to using a rules engine over a general purpose scripting language? The whole purpose for me choosing drools over Groovy eval() was that I didn't want to give my users the ability to spawn threads, allocate massive amounts of memory etc. On 09/18/2010 10:59 AM, Wolfgang Laun wrote: _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users - -- Cheers, Matt Young solid(a)youngdev.net http://youngdev.net