Package org.drools

Examples of org.drools.WorkingMemory

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        final RuleBase ruleBase = getRuleBase();
        reteooRuleBase = (org.drools.reteoo.ReteooRuleBase) ruleBase;

        ruleBase.addPackage( pkg );

        final WorkingMemory workingMemory = ruleBase.newStatefulSession();

        if ( reteooRuleBase != null ) {
            assertEquals( 1,
                          reteooRuleBase.getPackages().length );
            assertEquals( 5,
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        //final Package pkg = serialisePackage( builder.getPackage() );
        final Package pkg = builder.getPackage();

        final RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        final WorkingMemory workingMemory = ruleBase.newStatefulSession();

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

        final Cheese stilton = new Cheese( "stilton",
                                           5 );
        workingMemory.insert( stilton );

        workingMemory.fireAllRules();

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

        // Check a function can be removed from a package.
        // Once removed any efforts to use it should throw an Exception
        ruleBase.removeFunction( "org.drools.test",
                                 "addFive" );

        final Cheese cheddar = new Cheese( "cheddar",
                                           5 );
        workingMemory.insert( cheddar );

        try {
            workingMemory.fireAllRules();
            fail( "Function should have been removed and NoClassDefFoundError thrown from the Consequence" );
        } catch ( final NoClassDefFoundError e ) {
        }

        // Check a new function can be added to replace an old function
        builder = new PackageBuilder();
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DynamicFunction2.drl" ) ) );

        ruleBase.addPackage( serialisePackage( builder.getPackage() ) );

        final Cheese brie = new Cheese( "brie",
                                        5 );
        workingMemory.insert( brie );

        workingMemory.fireAllRules();

        assertEquals( new Integer( 6 ),
                      list.get( 1 ) );

        builder = new PackageBuilder();
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DynamicFunction3.drl" ) ) );

        ruleBase.addPackage( serialisePackage( builder.getPackage() ) );

        final Cheese feta = new Cheese( "feta",
                                        5 );
        workingMemory.insert( feta );

        workingMemory.fireAllRules();

        assertEquals( new Integer( 5 ),
                      list.get( 2 ) );
    }
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        final RuleBase ruleBase = getRuleBase();
        final String packageName = builder.getPackage().getName();
        ruleBase.addPackage( serialisePackage( builder.getPackage() ) );

        final WorkingMemory workingMemory = ruleBase.newStatefulSession();

        workingMemory.insert( new Precondition( "genericcode",
                                                "genericvalue" ) );
        workingMemory.fireAllRules();

        final RuleBase ruleBaseWM = workingMemory.getRuleBase();
        ruleBaseWM.removePackage( packageName );
        final PackageBuilder builder1 = new PackageBuilder();
        builder1.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_RemovePackage.drl" ) ) );
        ruleBaseWM.addPackage( serialisePackage( builder1.getPackage() ) );
        workingMemory.fireAllRules();

        ruleBaseWM.removePackage( packageName );
        ruleBaseWM.addPackage( serialisePackage( builder1.getPackage() ) );

        ruleBaseWM.removePackage( packageName );
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        ruleBaseWM.addPackage( serialisePackage( builder1.getPackage() ) );
    }

    public void testDynamicRules() throws Exception {
        final RuleBase ruleBase = getRuleBase();
        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        final Cheese a = new Cheese( "stilton",
                                     10 );
        final Cheese b = new Cheese( "stilton",
                                     15 );
        final Cheese c = new Cheese( "stilton",
                                     20 );
        workingMemory.insert( a );
        workingMemory.insert( b );
        workingMemory.insert( c );

        final PackageBuilder builder = new PackageBuilder();
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DynamicRules.drl" ) ) );
        final Package pkg = builder.getPackage();
        ruleBase.addPackage( serialisePackage( pkg ) );

        workingMemory.fireAllRules();
    }
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        workingMemory.fireAllRules();
    }

    public void testDynamicRules2() throws Exception {
        final RuleBase ruleBase = getRuleBase();
        final WorkingMemory workingMemory = ruleBase.newStatefulSession();

        // Assert some simple facts
        final FactA a = new FactA( "hello",
                                   new Integer( 1 ),
                                   new Float( 3.14 ) );
        final FactB b = new FactB( "hello",
                                   new Integer( 2 ),
                                   new Float( 6.28 ) );
        workingMemory.insert( a );
        workingMemory.insert( b );

        final PackageBuilder builder = new PackageBuilder();
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DynamicRules2.drl" ) ) );
        final Package pkg = serialisePackage( builder.getPackage() );
        ruleBase.addPackage( pkg );

        workingMemory.fireAllRules();
    }
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        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_CollectDynamicRules1.drl" ) ) );
        final Package pkg = builder.getPackage();

        final RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg );
        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        List list = new ArrayList();
        workingMemory.setGlobal( "results", list );

        workingMemory.insert( new Cheese( "stilton", 10 ) );
        workingMemory.insert( new Cheese( "brie", 10 ) );
        workingMemory.insert( new Cheese( "stilton", 10 ) );
        workingMemory.insert( new Cheese( "muzzarela", 10 ) );

        final PackageBuilder builder2 = new PackageBuilder();
        builder2.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_CollectDynamicRules2.drl" ) ) );
        final Package pkg2 = builder2.getPackage();
        ruleBase.addPackage( pkg2 );
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        ruleBase.addPackage( pkg );
        final PackageBuilder builder2 = new PackageBuilder();
        builder2.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DynamicRulesWithSubnetwork2.drl" ) ) );
        ruleBase.addPackage( serialisePackage( builder2.getPackage() ) );

        final WorkingMemory workingMemory = ruleBase.newStatefulSession();

        final List list = new ArrayList();
        workingMemory.setGlobal( "results",
                                 list );
       
        Order order = new Order();
       
        OrderItem item1 = new OrderItem(order, 1, "Adventure Guide Brazil", OrderItem.TYPE_BOOK, 24);
        order.addItem(item1);
        workingMemory.insert(item1);
       
        OrderItem item2 = new OrderItem(order, 2, "Prehistoric Britain", OrderItem.TYPE_BOOK, 15);
        order.addItem(item2);
        workingMemory.insert(item2);
       
        OrderItem item3 = new OrderItem(order, 3, "Holiday Music", OrderItem.TYPE_CD, 9);
        order.addItem(item3);
        workingMemory.insert(item3);
       
        OrderItem item4 = new OrderItem(order, 4, "Very Best of Mick Jagger", OrderItem.TYPE_CD, 11);
        order.addItem(item4);
        workingMemory.insert(item4);
       
        workingMemory.insert(order);

        assertEquals( 11,
                      workingMemory.getAgenda().getActivations().length );

        reteooRuleBase.removeRule( "org.drools",
                                   "Apply Discount on all books" );
        assertEquals( 10,
                      workingMemory.getAgenda().getActivations().length );

        reteooRuleBase.removeRule( "org.drools",
                                   "like book" );

        final OrderItem item5 = new OrderItem(order, 5, "Sinatra : Vegas", OrderItem.TYPE_CD,
                                             5 );
        assertEquals( 8,
                      workingMemory.getAgenda().getActivations().length );

        workingMemory.insert( item5 );

        assertEquals( 10,
                      workingMemory.getAgenda().getActivations().length );

        reteooRuleBase.removePackage( "org.drools" );

        assertEquals( 0,
                      workingMemory.getAgenda().getActivations().length );
    }
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        final RuleBase ruleBase = getRuleBase();
        reteooRuleBase = (org.drools.reteoo.ReteooRuleBase) ruleBase;

        ruleBase.addPackage( pkg );

        final WorkingMemory workingMemory = ruleBase.newStatefulSession();

        if ( reteooRuleBase != null ) {
            assertEquals( 1,
                          reteooRuleBase.getPackages().length );
            assertEquals( 4,
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        final RuleBase ruleBase = getRuleBase();
        final String packageName = builder.getPackage().getName();
        ruleBase.addPackage( serialisePackage( builder.getPackage() ) );

        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        List results = new ArrayList();
        workingMemory.setGlobal( "results", results );

        Order order = new Order();
       
        OrderItem item1 = new OrderItem(order, 1, "Adventure Guide Brazil", OrderItem.TYPE_BOOK, 24);
        OrderItem item2 = new OrderItem(order, 2, "Prehistoric Britain", OrderItem.TYPE_BOOK, 15);
        OrderItem item3 = new OrderItem(order, 3, "Holiday Music", OrderItem.TYPE_CD, 9);
        OrderItem item4 = new OrderItem(order, 4, "Very Best of Mick Jagger", OrderItem.TYPE_CD, 11);
        OrderItem item5 = new OrderItem(order, 5, "The Master and Margarita", OrderItem.TYPE_BOOK, 29);
       
        order.addItem( item1 );
        order.addItem( item2 );
        order.addItem( item3 );
        order.addItem( item4 );
        order.addItem( item5 );
       
        workingMemory.insert( order );
        workingMemory.fireAllRules();
        assertEquals( 1, results.size() );
        assertEquals( 3, ((List) results.get(0)).size() );
        results.clear();

        final RuleBase ruleBaseWM = workingMemory.getRuleBase();
        ruleBaseWM.removePackage( packageName );
        final PackageBuilder builder1 = new PackageBuilder();
        builder1.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DynamicRulesWithSubnetwork.drl" ) ) );
        ruleBaseWM.addPackage( serialisePackage( builder1.getPackage() ) );
        workingMemory.fireAllRules();
        assertEquals( 1, results.size() );
        assertEquals( 3, ((List) results.get(0)).size() );
        results.clear();

        ruleBaseWM.removePackage( packageName );
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        final MVELEvalBuilder builder = new MVELEvalBuilder();
        final EvalCondition eval = (EvalCondition) builder.build( context,
                                                                  evalDescr );

        final RuleBase ruleBase = RuleBaseFactory.newRuleBase();
        final WorkingMemory wm = ruleBase.newStatefulSession();

        final Cheese cheddar = new Cheese( "cheddar",
                                           10 );
        final InternalFactHandle f0 = (InternalFactHandle) wm.insert( cheddar );
        final ReteTuple tuple = new ReteTuple( f0 );
       
        Object evalContext = eval.createContext();

        assertTrue( eval.isAllowed( tuple,
                                    wm,
                                    evalContext ) );

        cheddar.setPrice( 9 );
        wm.update( f0,
                   cheddar );
        assertFalse( eval.isAllowed( tuple,
                                     wm,
                                     evalContext ) );
    }
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