Re: [rules-users] How to empty the Working memory

Using that rule worked, sort of... It correctly removes all of the objects in the working memory. The problem is that it clears everything... If you use mule together with drools the drools module will send back whatever you sen to it to mule when there are no more rules fireing. If I delete everything as a last step then I wont get my modified data back. Right now i have one method that takes a WorkingMemory and a collection and inserts everything from the collection in the working memory. *Rule* rule 'addAllFromCollection' when c : MyCollection ( newCollection == true ) then DroolsUtil.insertCollection(drools.workingMemory, c ) end *JavaCode* public static void insertCollection(WorkingMemory workingMemory, Collection collection) { Iterator iterator = collection.iterator(); while (iterator.hasNext()) { workingMemory.insert(iterator.next()); } } Basically what i want to do is write a corresponding function to retract everything that is old *Rule* rule 'retractAllFromCollection' when c : MyCollection ( newCollection == false ) then DroolsUtil.retractCollection(drools.workingMemory, c ) end *JavaCode* public static void retractCollection(WorkingMemory workingMemory, Collection collection) { Iterator iterator = collection.iterator(); while (iterator.hasNext()) { workingMemory.retract(iterator.next()); } } The problem is that the method workingMemory.retract() doesn't take a argument but a FactHandle as an argument but if i try something like *JavaCode* public static void retractCollection(WorkingMemory workingMemory) { Collection collection = workingMemory.getFactHandles(); Iterator iterator = collection.iterator(); while (iterator.hasNext()) { workingMemory.retract(iterator.next()); } } I get a rather strange exception java.lang.UnsupportedOperationException: this is implementedby StatefulKnowledgeImpl at org.drools.reteoo.ReteooWorkingMemory.getFactHandles(ReteooWorkingMemory.java:363) at se.sunstone.ebs.mama.oneqc.drools.DroolsUtil.insertCollection(DroolsUtil.java:21) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) Any thoughts? -- View this message in context: http://drools.46999.n3.nabble.com/How-to-empty-the-Working-memory-tp38186... 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