Package org.drools

Examples of org.drools.StatefulSession.retract()

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        //Test 2nd level (parent) to make sure rule honors the extend rule
        list = new ArrayList();
        session.setGlobal( "list",
                           list );
        session.retract( handle );
        final Cheese mycheese2 = new Cheese( "notcheddar",
                                             4 );
        FactHandle handle2 = session.insert( mycheese2 );
        session.fireAllRules();
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                      l.size() );
        assertEquals( 2,
                      ((CheeseEqual) l.get( 0 )).getPrice() );

        h = getFactHandle( h, workingMemory );
        workingMemory.retract( h );
        workingMemory = getSerialisedStatefulSession( workingMemory );       
        assertEquals( 0,
                      IteratorToList.convert( workingMemory.iterateObjects() ).size() );

        TruthMaintenanceSystem tms = ((InternalWorkingMemory) workingMemory).getTruthMaintenanceSystem();
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        assertEquals( "agenda should be empty.",
                      0,
                      workingMemory.getAgenda().agendaSize() );

        h = getFactHandle( h, workingMemory );
        workingMemory.retract( h );
        workingMemory = getSerialisedStatefulSession( workingMemory );
        workingMemory.fireAllRules();
        workingMemory = getSerialisedStatefulSession( workingMemory );
        list = IteratorToList.convert( workingMemory.iterateObjects() );
        assertEquals( "i was not asserted by not a => i.",
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                      l.size() );
        assertEquals( 3,
                      ((CheeseEqual) l.get( 0 )).getPrice() );

        h = getFactHandle( h, workingMemory );
        workingMemory.retract( h );
        workingMemory = getSerialisedStatefulSession( workingMemory );
        assertEquals( 0,
                      IteratorToList.convert( workingMemory.iterateObjects() ).size() );

        TruthMaintenanceSystem tms = ((InternalWorkingMemory) workingMemory).getTruthMaintenanceSystem();
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        FactHandle handle = workingMemory.insert( "halt" );
        Thread.sleep( 2000 );

        // now check that rule "halt" fired once, creating one Integer
        assertEquals( 2, workingMemory.getFactCount() );
        workingMemory.retract( handle );
    }

    @Test
    public void testTimerRemoval() {
        try {
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        Thread.sleep( 150 );

        ksession.insert( "halt" );

        Thread.sleep( 200 );
        ksession.retract( handle );

        new Thread( new Runnable(){
            public void run(){ ksession.fireUntilHalt(); }
        } ).start();
        Thread.sleep( 200 );
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                      l.size() );
        assertEquals( 2,
                      ((CheeseEqual) l.get( 0 )).getPrice() );

        h = getFactHandle( h, workingMemory );
        workingMemory.retract( h );
        workingMemory = getSerialisedStatefulSession( workingMemory );       
        assertEquals( 0,
                      IteratorToList.convert( workingMemory.iterateObjects() ).size() );

        TruthMaintenanceSystem tms = ((InternalWorkingMemory) workingMemory).getTruthMaintenanceSystem();
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        assertEquals( "agenda should be empty.",
                      0,
                      workingMemory.getAgenda().agendaSize() );

        h = getFactHandle( h, workingMemory );
        workingMemory.retract( h );
        workingMemory = getSerialisedStatefulSession( workingMemory );
        workingMemory.fireAllRules();
        workingMemory = getSerialisedStatefulSession( workingMemory );
        list = IteratorToList.convert( workingMemory.iterateObjects() );
        assertEquals( "i was not asserted by not a => i.",
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                      l.size() );
        assertEquals( 3,
                      ((CheeseEqual) l.get( 0 )).getPrice() );

        h = getFactHandle( h, workingMemory );
        workingMemory.retract( h );
        workingMemory = getSerialisedStatefulSession( workingMemory );
        assertEquals( 0,
                      IteratorToList.convert( workingMemory.iterateObjects() ).size() );

        TruthMaintenanceSystem tms = ((InternalWorkingMemory) workingMemory).getTruthMaintenanceSystem();
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        assertEquals( fireCount,
                             results.size() );

        // ---------------- 4th scenario
        wm.retract( cheeseHandles[3] );
        wm.fireAllRules();

        // should not have fired as per constraint
        assertEquals( fireCount,
                             results.size() );
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