@Test
public void testLogicalInsertionsNoLoop() throws Exception {
final PackageBuilder builder = new PackageBuilder();
builder.addPackageFromDrl(
new InputStreamReader(getClass().getResourceAsStream("test_LogicalInsertionsNoLoop.drl")));
final Package pkg = builder.getPackage();
RuleBase ruleBase = getRuleBase();
ruleBase.addPackage(pkg);
ruleBase = SerializationHelper.serializeObject(ruleBase);
final WorkingMemory workingMemory = ruleBase.newStatefulSession();
List list;
final List l = new ArrayList();
final Person a = new Person("a");
workingMemory.setGlobal("a", a);
workingMemory.setGlobal("l", l);
workingMemory.fireAllRules();
list =
IteratorToList.convert(workingMemory.iterateObjects(new ClassObjectFilter(a.getClass())));
assertEquals("a still in WM", 0, list.size());
assertEquals("Rule should not loop", 1, l.size());
}
@Test
public void testLogicalInsertionsSelfreferencing() throws Exception {
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(
ResourceFactory.newClassPathResource(
"test_LogicalInsertionsSelfreferencing.drl", getClass()),
ResourceType.DRL);
Collection<KnowledgePackage> kpkgs = kbuilder.getKnowledgePackages();
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kpkgs);
kbase = SerializationHelper.serializeObject(kbase);
final StatefulKnowledgeSession session = createKnowledgeSession(kbase);
final Person b = new Person("b");
final Person a = new Person("a");
session.setGlobal("b", b);
FactHandle h1 = session.insert(a);
session.fireAllRules();
Collection<?> list = session.getObjects(new ClassObjectFilter(a.getClass()));
assertEquals(2, list.size());
assertTrue(list.contains(a));
assertTrue(list.contains(b));
session.retract(h1);
session.fireAllRules();
list = session.getObjects(new ClassObjectFilter(a.getClass()));
assertEquals(
"b was retracted, but it should not have. Is backed by b => b being true.", 1, list.size());
assertEquals(
"b was retracted, but it should not have. Is backed by b => b being true.",
b,
list.iterator().next());
h1 = session.getFactHandle(b);
session.retract(h1);
session.fireAllRules();
list = session.getObjects(new ClassObjectFilter(a.getClass()));
assertEquals(0, list.size());
}
@Test
public void testLogicalInsertionsLoop() throws Exception {
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(
ResourceFactory.newClassPathResource("test_LogicalInsertionsLoop.drl", getClass()),
ResourceType.DRL);
Collection<KnowledgePackage> kpkgs = kbuilder.getKnowledgePackages();
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kpkgs);
kbase = SerializationHelper.serializeObject(kbase);
final StatefulKnowledgeSession session = createKnowledgeSession(kbase);
final List l = new ArrayList();
final Person a = new Person("a");
session.setGlobal("a", a);
session.setGlobal("l", l);
session.fireAllRules();
Collection<?> list = session.getObjects(new ClassObjectFilter(a.getClass()));
assertEquals("a still asserted.", 0, list.size());
assertEquals("Rule has not fired (looped) expected number of times", 10, l.size());
}
