Examples of org.drools.StatefulSession

org.drools.StatefulSession
A stateful session represents a working memory which keeps state between invocations (accumulating facts/knowledge). Caution should be used when using the async methods (take note of the javadocs for specific methods). IMPORTANT: Remember to call dispose() when finished with this session.

                                                     config );


        BetaMemory betaMemory = betaConstraints.createBetaMemory( config, NodeTypeEnums.JoinNode );


        RuleBase rb = RuleBaseFactory.newRuleBase();
        StatefulSession ss = rb.newStatefulSession();


        InternalFactHandle fh1 = (InternalFactHandle) ss.insert( new Foo( "brie",
                                                                          1 ) );
        InternalFactHandle fh2 = (InternalFactHandle) ss.insert( new Foo( "brie",
                                                                          1 ) );
        InternalFactHandle fh3 = (InternalFactHandle) ss.insert( new Foo( "soda",
                                                                          1 ) );
        InternalFactHandle fh4 = (InternalFactHandle) ss.insert( new Foo( "soda",
                                                                          1 ) );
        InternalFactHandle fh5 = (InternalFactHandle) ss.insert( new Foo( "bread",
                                                                          3 ) );
        InternalFactHandle fh6 = (InternalFactHandle) ss.insert( new Foo( "bread",
                                                                          3 ) );
        InternalFactHandle fh7 = (InternalFactHandle) ss.insert( new Foo( "cream",
                                                                          3 ) );
        InternalFactHandle fh8 = (InternalFactHandle) ss.insert( new Foo( "gorda",
                                                                          15 ) );
        InternalFactHandle fh9 = (InternalFactHandle) ss.insert( new Foo( "beer",
                                                                          16 ) );


        InternalFactHandle fh10 = (InternalFactHandle) ss.insert( new Foo( "mars",
                                                                           0 ) );
        InternalFactHandle fh11 = (InternalFactHandle) ss.insert( new Foo( "snicker",
                                                                           0 ) );
        InternalFactHandle fh12 = (InternalFactHandle) ss.insert( new Foo( "snicker",
                                                                           0 ) );
        InternalFactHandle fh13 = (InternalFactHandle) ss.insert( new Foo( "snicker",
                                                                           0 ) );


        betaMemory.getLeftTupleMemory().add( new LeftTupleImpl( fh1,
                                                            null,
                                                            true ) );

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        System.out.println( builder.getErrors() );


        RuleBase ruleBase = RuleBaseFactory.newRuleBase();
        ruleBase.addPackage( builder.getPackage() );


        StatefulSession session = ruleBase.newStatefulSession();
        List list = new ArrayList();
        session.setGlobal( "list", list );


        session.startProcess( "process name" );


        assertEquals( 2, list.size() );
        assertEquals( "action node was here", list.get(0) );
        assertEquals( "dsl was here", list.get(1) );
    }

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        RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );


        ruleBase = SerializationHelper.serializeObject( ruleBase );
        StatefulSession session = ruleBase.newStatefulSession();


        final Cheese stilton = new Cheese( "stinky",
                                           5 );
        session.insert( stilton );
        session = SerializationHelper.getSerialisedStatefulSession( session,
                                                                            ruleBase );
        final QueryResults results = session.getQueryResults( "simple query" );
        assertEquals( 1,
                      results.size() );


    }

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        RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );


        ruleBase = SerializationHelper.serializeObject( ruleBase );
        StatefulSession session = ruleBase.newStatefulSession();


        final Cheese stilton = new Cheese( "stinky",
                                           5 );
        session.insert( stilton );
        session = SerializationHelper.getSerialisedStatefulSession( session,
                                                                            ruleBase );
        QueryResults results = session.getQueryResults( "simple query" );
        assertEquals( 1,
                      results.size() );


        assertNotNull( ruleBase.getPackage( "org.drools.test" ).getRule( "simple query" ) );


        ruleBase.removeQuery( "org.drools.test",
                              "simple query" );


        assertNull( ruleBase.getPackage( "org.drools.test" ).getRule( "simple query" ) );


        results = session.getQueryResults( "simple query" );
        assertEquals( 0,
                      results.size() );


    }

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            throw new RuntimeException(e);
        }
    }


    public void execute(int repNr) {
        StatefulSession session = ruleBase.newStatefulSession();
        for (Line l : lines) {
            session.insert( l );
        }
        session.insert( new Stage( Stage.DUPLICATE ) );
        session.fireAllRules();
        session.dispose();
    }

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        final Package pkg = builder.getPackage();


        RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        ruleBase = SerializationHelper.serializeObject( ruleBase );
        StatefulSession session = ruleBase.newStatefulSession();


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


        String expected = "s\tti\"lto\nn";
        final Cheese stilton = new Cheese( expected,
                                           5 );
        session.insert( stilton );
        session = SerializationHelper.getSerialisedStatefulSession( session,
                                                                    ruleBase );


        int fired = session.fireAllRules();
        assertEquals( 1,
                      fired );


        assertEquals( expected,
                      ((List) session.getGlobal( "list" )).get( 0 ) );
    }

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        final Package pkg = builder.getPackage();


        RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        ruleBase = SerializationHelper.serializeObject( ruleBase );
        StatefulSession session = ruleBase.newStatefulSession();


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


        final PersonInterface bill = new Person( "bill",
                                                 null,
                                                 12 );
        bill.setAlive( true );
        session.insert( bill );
        session = SerializationHelper.getSerialisedStatefulSession( session,
                                                                    ruleBase );


        session.fireAllRules();


        assertEquals( bill,
                      ((List) session.getGlobal( "list" )).get( 0 ) );
    }

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        ruleBase = SerializationHelper.serializeObject( ruleBase );
        Environment env = EnvironmentFactory.newEnvironment();
        env.set( EnvironmentName.OBJECT_MARSHALLING_STRATEGIES,
                 new ObjectMarshallingStrategy[]{
                        new IdentityPlaceholderResolverStrategy( ClassObjectMarshallingStrategyAcceptor.DEFAULT )} );
        StatefulSession session = ruleBase.newStatefulSession( null,
                                                               env );


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


        final State state = new State( "initial" );
        session.insert( state,
                        true );
        session.fireAllRules();


        assertEquals( 1,
                      ((List) session.getGlobal( "list" )).size() );


        state.setFlag( true );
        assertEquals( 1,
                      ((List) session.getGlobal( "list" )).size() );


        session.fireAllRules();
        assertEquals( 2,
                      ((List) session.getGlobal( "list" )).size() );


        state.setState( "finished" );


        StatefulKnowledgeSession ksesion = SerializationHelper.getSerialisedStatefulKnowledgeSession( new StatefulKnowledgeSessionImpl( (ReteooWorkingMemory) session ),
                                                                                                      //                                                                                              MarshallerFactory.newIdentityMarshallingStrategy(),
                                                                                                      false );


        ksesion.fireAllRules();
        assertEquals( 3,
                      ((List) session.getGlobal( "list" )).size() );


    }

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        final Package pkg = builder.getPackage();


        RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        ruleBase = SerializationHelper.serializeObject( ruleBase );
        StatefulSession session = ruleBase.newStatefulSession();


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


        final PersonInterface bill = new Person( "bill",
                                                 null,
                                                 12 );
        bill.setBigDecimal( new BigDecimal( "42" ) );


        final PersonInterface ben = new Person( "ben",
                                                null,
                                                13 );
        ben.setBigDecimal( new BigDecimal( "43" ) );


        session.insert( bill );
        session.insert( ben );
        session = SerializationHelper.getSerialisedStatefulSession( session,
                                                                    ruleBase );
        session.fireAllRules();


        assertEquals( 1,
                      ((List) session.getGlobal( "list" )).size() );
    }

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        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "big_decimal_and_literal.drl" ) ) );
        final Package pkg = builder.getPackage();


        final RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        StatefulSession session = ruleBase.newStatefulSession();


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


        final PersonInterface bill = new Person( "bill",
                                                 null,
                                                 12 );
        bill.setBigDecimal( new BigDecimal( "42" ) );
        bill.setBigInteger( new BigInteger( "42" ) );


        session.insert( bill );
        session = SerializationHelper.getSerialisedStatefulSession( session,
                                                                    ruleBase );
        session.fireAllRules();


        assertEquals( 6,
                      ((List) session.getGlobal( "list" )).size() );
    }

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