Examples of org.drools.runtime.StatelessKnowledgeSession

org.drools.runtime.StatelessKnowledgeSession
a global hibernate session, that can be used for DB interactions in the rules. ksession.execute( collection ); // this will now execute and will be able to resolve the "hbnSession" identifier.
The third way is execution scopped globals using the CommandExecutor and SetGlobal Commands:
```
 List cmds = new ArrayList(); cmds.add( CommandFactory.newSetGlobal( "list1", new ArrayList() ) ); cmds.add( CommandFactory.newInsert( new Person( "jon", 102 ) ) ); ksession.execute( CommandFactory.newBatchExecution( cmds ) ); 
```
The CommandExecutor interface also supports the ability to export data via "out" parameters. Inserted facts, globals and query results can all be returned.
```
 List cmds = new ArrayList(); cmds.add( CommandFactory.newSetGlobal( "list1", new ArrayList(), true ) ); cmds.add( CommandFactory.newInsert( new Person( "jon", 102 ), "person" ) ); cmds.add( CommandFactory.newQuery( "Get People" "getPeople" ); ExecutionResults results = ksession.execute( CommandFactory.newBatchExecution( cmds ) ); results.getValue( "list1" ); // returns the ArrayList results.getValue( "person" ); // returns the inserted fact Person results.getValue( "Get People" );// returns the query as a QueryResults instance. 
```
@see org.drools.runtime.CommandExecutor @see org.drools.runtime.command.CommandFactory @see org.drools.runtime.command.BatchExecution @see org.drools.runtime.ExecutionResults.BatchExecutionResults @see org.drools.runtime.help.BatchExecutionHelp @see org.drools.runtime.pipeline.PipelineFactory @see org.drools.runtime.Globals

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


        kbase    = SerializationHelper.serializeObject( kbase );
        final StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();


        final List list = new ArrayList();
        ksession.setGlobal( "list",
                           list );


        ksession.execute( new Person( "pob")  );


        assertEquals( 3,
                      list.size() );
        
        assertEquals( "rule 3", list.get( 0 ));

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


        kbase    = SerializationHelper.serializeObject( kbase );
        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
        
        ksession.execute( new Message( "help" ) );
    }

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


        kbase    = SerializationHelper.serializeObject( kbase );
        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
        
        final List list = new ArrayList();
        
        ksession.addEventListener( new AgendaEventListener() {


            public void activationCancelled(ActivationCancelledEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void activationCreated(ActivationCreatedEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void afterActivationFired(AfterActivationFiredEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void agendaGroupPopped(AgendaGroupPoppedEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void agendaGroupPushed(AgendaGroupPushedEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void beforeActivationFired(BeforeActivationFiredEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


        });
        
        ksession.addEventListener( new WorkingMemoryEventListener() {


            public void objectInserted(ObjectInsertedEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void objectRetracted(ObjectRetractedEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }


            public void objectUpdated(ObjectUpdatedEvent event) {
                assertNotNull( event.getKnowledgeRuntime() );
                list.add( event );
            }
            
        });
        
        ksession.execute( new Message( "help" ) );
        
        assertEquals( 4, list.size() );
    }

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


        kbase    = SerializationHelper.serializeObject( kbase );
        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();


        final List list = new ArrayList();
        ksession.setGlobal( "list",
                           list );


        ksession.execute(new Person("pob"));


        kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        kbuilder.add( ResourceFactory.newClassPathResource( "test_Dynamic3.drl", DynamicRulesTest.class ), ResourceType.DRL );


        kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
        ksession = kbase.newStatelessKnowledgeSession();
        ksession.setGlobal( "list",
                           list );
        Person  person  = new Person("bop");
        ksession.execute(person);


        assertEquals( 7,
                      list.size() );


        assertEquals( "rule 3", list.get( 0 ));

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                                            config );
    }


    @Test
    public void testSingleObjectAssert() throws Exception {
        StatelessKnowledgeSession session = getSession2( "literal_rule_test.drl" );


        final Cheese stilton = new Cheese( "stilton",
                                           5 );


        session.execute( stilton );


        assertEquals( "stilton",
                      list.get( 0 ) );
    }

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                      list.get( 0 ) );
    }


    @Test
    public void testArrayObjectAssert() throws Exception {
        StatelessKnowledgeSession session = getSession2( "literal_rule_test.drl" );


        final Cheese stilton = new Cheese( "stilton",
                                           5 );


        session.execute( Arrays.asList( new Object[]{stilton} ) );


        assertEquals( "stilton",
                      list.get( 0 ) );
    }

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                      list.get( 0 ) );
    }


    @Test
    public void testCollectionObjectAssert() throws Exception {
        StatelessKnowledgeSession session = getSession2( "literal_rule_test.drl" );


        final Cheese stilton = new Cheese( "stilton",
                                           5 );


        List collection = new ArrayList();
        collection.add( stilton );
        session.execute( collection );


        assertEquals( "stilton",
                      list.get( 0 ) );
    }

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        str += "    $c.setPrice( 30 ); \n";
        str += "end\n";
        
        Cheese stilton = new Cheese( "stilton", 5 );
        
        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        GenericCommand cmd = ( GenericCommand ) CommandFactory.newInsert( stilton, "outStilton" );
        BatchExecutionCommandImpl batch = new BatchExecutionCommandImpl(  Arrays.asList( new GenericCommand<?>[] { cmd } ) );
        
        ExecutionResults result = ( ExecutionResults ) ksession.execute( batch );
        stilton = ( Cheese ) result.getValue( "outStilton" );
        assertEquals( 30,
                      stilton.getPrice() );
    }

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        Cheese stilton = new Cheese( "stilton", 5 );
        List list1 = new ArrayList();
        List list2 = new ArrayList();
        List list3 = new ArrayList();
        
        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        Command setGlobal1 = CommandFactory.newSetGlobal( "list1", list1 );
        Command setGlobal2 = CommandFactory.newSetGlobal( "list2", list2, true );
        Command setGlobal3 = CommandFactory.newSetGlobal( "list3", list3, "outList3" );
        Command insert = CommandFactory.newInsert( stilton  );
        
        List cmds = new ArrayList();
        cmds.add( setGlobal1 );
        cmds.add( setGlobal2 );
        cmds.add( setGlobal3 );
        cmds.add(  insert );
        
        ExecutionResults result = ( ExecutionResults ) ksession.execute( CommandFactory.newBatchExecution( cmds ) );
        
        assertEquals( 30,
                      stilton.getPrice() );
        
        assertNull( result.getValue( "list1" ) );

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


        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
        Cheese stilton1 = new Cheese( "stilton", 1);
        Cheese cheddar1 = new Cheese( "cheddar", 1);
        Cheese stilton2 = new Cheese( "stilton", 2);
        Cheese cheddar2 = new Cheese( "cheddar", 2);
        Cheese stilton3 = new Cheese( "stilton", 3);
        Cheese cheddar3 = new Cheese( "cheddar", 3);
        
        Set set = new HashSet();
        List list = new ArrayList();
        list.add(stilton1);
        list.add(cheddar1);
        set.add( list );
        
        list = new ArrayList();
        list.add(stilton2);
        list.add(cheddar2);
        set.add( list );
        
        list = new ArrayList();
        list.add(stilton3);
        list.add(cheddar3);
        set.add( list );
        
        List<Command> cmds = new ArrayList<Command>();
        cmds.add( CommandFactory.newInsert( stilton1 ) );
        cmds.add( CommandFactory.newInsert( stilton2 ) );
        cmds.add( CommandFactory.newInsert( stilton3 ) );
        cmds.add( CommandFactory.newInsert( cheddar1 ) );
        cmds.add( CommandFactory.newInsert( cheddar2 ) );
        cmds.add( CommandFactory.newInsert( cheddar3 ) );
        
        cmds.add(  CommandFactory.newQuery( "cheeses", "cheeses" ) );
        
        ExecutionResults batchResult = (ExecutionResults) ksession.execute( CommandFactory.newBatchExecution( cmds ) );
        
        org.drools.runtime.rule.QueryResults results = ( org.drools.runtime.rule.QueryResults) batchResult.getValue( "cheeses" );
        assertEquals( 3, results.size() );
        assertEquals( 2, results.getIdentifiers().length );
        Set newSet = new HashSet();

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