knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages());
StatefulKnowledgeSession ksession = knowledgeBase.newStatefulKnowledgeSession();
Address address = new Address();
address.setSuburb("xyz");
org.drools.runtime.rule.FactHandle addressHandle = ksession.insert(address);
int rulesFired = ksession.fireAllRules();
assertEquals( 0, rulesFired );
address.setStreet("123");
ksession.update(addressHandle, address);
rulesFired = ksession.fireAllRules();