From: dunnlow <dunnlow(a)yahoo.com&gt; Subject: [rules-users] Why isn't my rule firing?? To: rules-users(a)lists.jboss.org Date: Wednesday, January 18, 2012, 1:47 PM First, my intent:   1) insert a pojo into a stateful session   2) based upon that pojo's attributes, create and insert a new fact (different type)   3) retract the initial pojo, but keep the newly created fact in memory for some period of time After some helpful insight from the forum, I thought I could knock this out. However, I'm stuck and I've boiled down to what I imagine is a misunderstanding that I have.  I have the code and rules below.  With each fact that I insert, I expected   1) to see the number of facts grow (the list of facts printed line 16 does grow with each call).  This works   2) to see the NotificationEvent added only once to working memory (the facts printed shows only one NotificationEvent and then a new MyBean for each one I insert).  So, I think this works also.   3) BUT, each time I call fireAllRules(), I expect the "foundNE" rule to be triggered and to see "Found A notification event" printed.  However, this is only printed once - after my first insert. Also, I see that 0 rules get fired (line 13) after the first MyBean insert. SO, if I see a NotificationEvent in the list of facts in line 17, why isn't my foundNE rule printing out the message each time I insert a new MyBean and call fireallrules?? FYI, my future plan is to have a rule with low salience that retracts the MyBeans just inserted and have my foundNE rule retract any NotificationEvents that are at least 10 mins old.  (so that the NotificationEvents will grow but not MyBeans) . Here is my test code (please excuse typos - there are none in my code): Thanks very much for any insight. -J ===test.java =============== 1  KnowledgeBase kbase = readKnowledgeBaseFromFile(); 2  StatefulKnowledegeSession ksession = kbase.newStatefulKnowledgeSession(): 3  KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession,"testlog"); 4  for (int x=0;x<10;x++){ 5    myBean mb = new MyBean(); 6     mb.setName("me"); 7     mb.setHeadline("my_head"); 8    mb.setTag("tagline"); 9 10    List<Command> cmds = new ArrayList<Command>(); 11    FactHandle fh = (FactHandle) ksession.insert(seb); 12    int rf = ksession.fireAllRules(); 13    System.out.println(rf+"rules fired"); 14 15    Collection<FactHandle> c = ksession.getFactHandles(); 16    for (FactHandle f:c) { 17        System.out.println("  now: "+f.toString()); 18    } 19 20    Thread.sleep(5000); 21 } === test.drl ================ import com.me.MyBean import java.util.Calendar declare NotificationEvent     name: String     headline: String     tagline: String     dts: Long end rule "foundNE"     dialect "mvel"     when         $ne : NotificationEvent()     then         System.out.println("Found a Notification Event"); end rule "NotTemplate_1"     dialect "mvel"     when         $myb : MyBean(name matches "me", headline matches "my_head")         not ($ne : NotificationEvent(name matches $myb.name, headline=$myb.headline)     then         NotificationEvent fact0 = new NotificationEvent();         fact0.setName($myb.name);         fact0.setHeadline($myb.headline);         insert(fact0);         System.out.println("Adding a notification event"); end -- View this message in context: http://drools.46999.n3.nabble.com/Why-isn-t-my-rule-firing-tp3670261p3670... 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