Package org.kie.runtime

Examples of org.kie.runtime.StatefulKnowledgeSession

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    }

    private StatefulKnowledgeSession createSession(KnowledgeBase kbase) {
        final KnowledgeSessionConfiguration conf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        conf.setOption( ClockTypeOption.get( ClockType.PSEUDO_CLOCK.getId() ) );
        StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession( kbase,
                                                                                             conf,
                                                                                             createEnvironment(context) );
        return ksession;
    }
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        ksession.dispose();

        final KnowledgeSessionConfiguration conf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        conf.setOption( ClockTypeOption.get( ClockType.PSEUDO_CLOCK.getId() ) );

        StatefulKnowledgeSession newksession = JPAKnowledgeService.loadStatefulKnowledgeSession( ksessionId,
                                                                                                 kbase,
                                                                                                 conf,
                                                                                                 createEnvironment(context) );
        return newksession;
    }
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   }

   public static StatefulKnowledgeSession createKnowledgeSessionFromKBase(KnowledgeBase kbase, HashMap<String, Object> context) {
       KnowledgeSessionConfiguration ksconf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
       StatefulKnowledgeSession knowledgeSession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, ksconf, createEnvironment(context));
       return knowledgeSession;
   }
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    public void testSingleSessionCommandServiceAndJtaTransactionManagerTogether() {
           
        // Initialize drools environment stuff
        Environment env = createEnvironment(context);
        KnowledgeBase kbase = initializeKnowledgeBase(simpleRule);
        StatefulKnowledgeSession commandKSession = JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null, env );
        SingleSessionCommandService commandService = (SingleSessionCommandService) ((CommandBasedStatefulKnowledgeSession) commandKSession).getCommandService();
        JpaPersistenceContextManager jpm = (JpaPersistenceContextManager) getValueOfField("jpm", commandService);

        jpm.getApplicationScopedPersistenceContext();
        EntityManager em = (EntityManager) getValueOfField("appScopedEntityManager", jpm);
       
        TransactionTestObject mainObject = new TransactionTestObject();
        mainObject.setName("mainCommand");
        TransactionTestObject subObject = new TransactionTestObject();
        subObject.setName("subCommand");
        mainObject.setSubObject(subObject);
      
        HashMap<String, Object> emEnv = new HashMap<String, Object>();
        emEnv.put(COMMAND_ENTITY_MANAGER_FACTORY, emf);
        emEnv.put(COMMAND_ENTITY_MANAGER, em);
       
        TransactionTestCommand txTestCmd = new TransactionTestCommand(mainObject, subObject, emEnv);
      
       
        commandKSession.execute(txTestCmd);
       
    }
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    @Test
    public void createPersistentSession() {
        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
       
        StatefulKnowledgeSession crmPersistentSession = createSession( kbase );
        crmPersistentSession.fireAllRules();

        crmPersistentSession = createSession( kbase );
        Assert.assertNotNull( crmPersistentSession );
    }
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        }

        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );

        StatefulKnowledgeSession ksession = createSession( kbase );

        FactHandle buddyFactHandle = ksession.insert( new Buddy() );
        ksession.fireAllRules();

        Assert.assertEquals( 1,
                             ksession.getObjects().size() );

        ksession = disposeAndReloadSession( ksession,
                                            kbase );

        Assert.assertNotNull( ksession );

        Assert.assertEquals( 1,
                             ksession.getObjects().size() );

        Assert.assertNull( "An object can't be retrieved with a FactHandle from a disposed session",
                           ksession.getObject( buddyFactHandle ) );

    }
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    public void dontCreateMoreSessionsThanNecessary() {
        long initialNumberOfSavedSessions = getSavedSessionsCount();
       
        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();

        StatefulKnowledgeSession crmPersistentSession = createSession(kbase);

        long ksessionId = crmPersistentSession.getId();
        crmPersistentSession.fireAllRules();

        crmPersistentSession = disposeAndReloadSession(crmPersistentSession, kbase);

        Assert.assertEquals(ksessionId, crmPersistentSession.getId());

        ksessionId = crmPersistentSession.getId();
        crmPersistentSession.fireAllRules();

        crmPersistentSession = disposeAndReloadSession(crmPersistentSession, kbase);

        crmPersistentSession.fireAllRules();

        Assert.assertEquals(initialNumberOfSavedSessions + 1, getSavedSessionsCount());
        crmPersistentSession.dispose();
    }
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    @Test
    public void insertObjectIntoKsessionAndRetrieve() {
        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
       
        StatefulKnowledgeSession crmPersistentSession = createSession(kbase);
        Buddy bestBuddy = new Buddy("john");
        crmPersistentSession.insert(bestBuddy);

        crmPersistentSession = disposeAndReloadSession(crmPersistentSession, kbase);
        Object obtainedBuddy = crmPersistentSession
                .getObjects().iterator().next();
        Assert.assertNotSame( bestBuddy, obtainedBuddy );
        Assert.assertEquals(bestBuddy, obtainedBuddy);

        crmPersistentSession.dispose();
    }
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    public Void execute(Context context) {
        em.joinTransaction();
        em.persist(mainObject);

        if( subObject != null ) {
            StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();
 
            // THe following 3 lines are the important ones! (See below for an explanation)
            KnowledgeBase cleanKBase = KnowledgeBaseFactory.newKnowledgeBase();
            cleanKBase.addKnowledgePackages(ksession.getKnowledgeBase().getKnowledgePackages());
            StatefulKnowledgeSession commandKSession = JPAKnowledgeService.newStatefulKnowledgeSession( cleanKBase, null, initializeEnvironment() );

            /**
             *  Here's what's going on:
             *  If the SingleSessionCommandService (SSCS) & JtaTransactionManager (JTM) were _not_ aware of transactions,
             *  -> then inserting the mainObject _before_ having inserted the subObject
             *     would cause the operation/persist to fail and the transaction to fail.
             *     - This is because the mainObject contains a foreign key referring to the subObject.
             *    
             *  However, the SSCS & JTM check whether or not they're owners of the transaction
             *  when starting and when committing the transaction they use.
             *  -> So that when we insert the mainObject here (via a _new_ CommandBasedStatefulKnowledgeSession),
             *     it does _not_ mess with the transaction state and the operation succeeds. 
             */
            TransactionTestCommand transactionTestSubCommand
                = new TransactionTestCommand(this.subObject, getPersistenceEnvironment()); commandKSession.execute(transactionTestSubCommand);
        }

        return null;
    }
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    public void init(BenchmarkDefinition definition) {
        kbase = createKnowledgeBase(createKnowledgeBuilder(drlFile));
    }

    public void execute(int repNr) {
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        ksession.fireAllRules();
        ksession.dispose();
    }
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Related Classes of org.kie.runtime.StatefulKnowledgeSession

  • org.drools.benchmark.benchmarks.PlainDRLBenchmark
  • org.drools.benchmark.benchmarks.WaltzBenchmark
  • org.drools.command.ExecuteCommand
  • org.drools.command.GetSessionClockCommand
  • org.drools.command.runtime.AddEventListenerCommand
  • org.drools.command.runtime.DisposeCommand
  • org.drools.command.runtime.GetCalendarsCommand
  • org.drools.command.runtime.GetChannelsCommand
  • org.drools.command.runtime.GetEnvironmentCommand
  • org.drools.command.runtime.GetFactCountCommand
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