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.

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


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


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


        Cheese cheese = new Cheese( "stilton",
                                    10 );
        Cheesery cheesery = new Cheesery();
        cheesery.addCheese( cheese );
        Person bob = new Person( "bob",
                                 "stilton" );
        Cheese cheese2 = new Cheese();
        bob.setCheese( cheese2 );


        FactHandle p = session.insert( bob );
        FactHandle c = session.insert( cheesery );


        session.fireAllRules();


        assertEquals( "should not have fired",
                      0,
                      list.size() );


        cheese2.setType( "stilton" );


        session.update( p,
                        bob );
        session.fireAllRules();


        assertEquals( 1,
                      list.size() );


    }

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        builder.addPackageFromDrl( new StringReader( rule ) );
        final Package pkg = builder.getPackage();


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


    }

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        builder.addPackageFromDrl( new StringReader( rule ) );
        final Package pkg = builder.getPackage();


        final RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        final StatefulSession session = ruleBase.newStatefulSession();
        List list = new ArrayList();
        session.setGlobal( "list",
                           list );
        session.fireAllRules();


        assertEquals( 1,
                      list.size() );
        assertEquals( "first",
                      list.get( 0 ) );

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        builder.addPackageFromDrl( new StringReader( rule ) );
        final Package pkg = builder.getPackage();


        final RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        final StatefulSession session = ruleBase.newStatefulSession();
        List list = new ArrayList();
        session.setGlobal( "list",
                           list );
        session.fireAllRules();


        assertEquals( 1,
                      list.size() );


        Person p = new Person( "diablo",

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        builder.addPackageFromDrl( new StringReader( rule ) );
        final Package pkg = builder.getPackage();


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


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


        Cheesery cheesery = new Cheesery();
        cheesery.addCheese( new Cheese( "stilton",
                                        22 ) );


        session.insert( cheesery );


        session.fireAllRules();


        assertEquals( 1,
                      list.size() );
        assertEquals( "stilton",
                      list.get( 0 ) );

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


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


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


        Map map = new HashMap();
        map.put( "content",
                 "hello ;=" );
        session.insert( map );


        session.fireAllRules();


        assertEquals( 1,
                      results.size() );
    }

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        builder = new PackageBuilder();
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_MergePackageWithSameRuleNames2.drl" ) ) );
        ruleBase.addPackage( builder.getPackage() );


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


        session.fireAllRules();


        assertEquals( 1,
                      results.size() );


        assertEquals( "rule1 for the package2",

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        RuleBaseConfiguration conf = new RuleBaseConfiguration();
        conf.setShadowProxy( true );
        RuleBase rb = RuleBaseFactory.newRuleBase( conf );
        rb.addPackage( builder.getPackage() );
        StatefulSession session = rb.newStatefulSession();


        List list1 = new ArrayList();
        List list2 = new ArrayList();


        session.setGlobal( "list1",
                           list1 );
        session.setGlobal( "list2",
                           list2 );


        SpecialString first42 = new SpecialString( "42" );
        SpecialString second43 = new SpecialString( "42" );
        SpecialString world = new SpecialString( "World" );
        session.insert( world );
        session.insert( first42 );
        session.insert( second43 );


        // System.out.println( "Firing rules ..." );


        session.fireAllRules();


        assertEquals( 6,
                      list1.size() );
        assertEquals( 6,
                      list2.size() );

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        Package pkg = builder.getPackage();


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


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


        session.insert( new Integer( 5 ) );
        session.fireAllRules();


        assertEquals( new Integer( 5 ),
                      list.get( 0 ) );


        builder = new PackageBuilder();

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    public void testGetFactHandleEqualityBehavior() throws Exception {
        final RuleBaseConfiguration conf = new RuleBaseConfiguration();
        conf.setAssertBehaviour( RuleBaseConfiguration.AssertBehaviour.EQUALITY );
        final RuleBase ruleBase = RuleBaseFactory.newRuleBase( conf );


        final StatefulSession session = ruleBase.newStatefulSession();


        CheeseEqual cheese = new CheeseEqual( "stilton",
                                              10 );
        session.insert( cheese );
        FactHandle fh = session.getFactHandle( new CheeseEqual( "stilton",
                                                                10 ) );
        assertNotNull( fh );
    }

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