Examples of org.drools.core.WorkingMemory

org.drools.core.WorkingMemory
A knowledge session for a RuleBase. While this object can be serialised out, it cannot be serialised in. This is because the RuleBase reference is transient. Please see the RuleBase interface for serializing in WorkingMemories from an InputStream.

        builder.build( context, Rule.DEFAULT_CONSEQUENCE_NAME );


        InternalRuleBase ruleBase = (InternalRuleBase)  RuleBaseFactory.newRuleBase();
        PropagationContextFactory pctxFactory = ruleBase.getConfiguration().getComponentFactory().getPropagationContextFactory();
        ruleBase.addPackage( pkg );
        final WorkingMemory wm = ruleBase.newStatefulSession();


        final Cheese cheddar = new Cheese( "cheddar", 10 );
        final InternalFactHandle f0 = (InternalFactHandle) wm.insert( cheddar );
        final LeftTupleImpl tuple = new LeftTupleImpl( f0, null, true );
        f0.removeLeftTuple(tuple);


        final AgendaItem item = new AgendaItemImpl( 0, tuple, 10,
                                                pctxFactory.createPropagationContext(1, 1, null, tuple, null),

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        final MVELConsequenceBuilder builder = new MVELConsequenceBuilder();
        builder.build( context, Rule.DEFAULT_CONSEQUENCE_NAME );


        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 LeftTupleImpl tuple = new LeftTupleImpl( f0,
                                               null,
                                               true );


        final AgendaItem item = new AgendaItemImpl( 0,

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        session1.fireAllRules();


        assertEquals( 1,
                      ((List) session1.getGlobal( "list" )).size() );


        WorkingMemory session2 = getSerialisedStatefulSession( session1,
                                                               true );


        session.dispose();
        session1.dispose();


        builder = new PackageBuilder();
        builder.addPackageFromDrl( new StringReader( rule2 ) );
        pkg = builder.getPackage();


        ruleBase.addPackage( pkg );
        session2.fireAllRules();
        System.out.println(session2.getGlobal( "list" ));


        assertEquals( 2,
                      ((List) session2.getGlobal( "list" )).size() );
        assertEquals( "fired1",
                      ((List) session2.getGlobal( "list" )).get( 0 ) );
        assertEquals( "fired2",
                      ((List) session2.getGlobal( "list" )).get( 1 ) );
    }

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    }


    @Test
    public void testSimpleExpression() {
        WorkingMemory wm = ruleBase.newStatefulSession();


        final Person p = new Person( "mark",
                                     "",
                                     31 );
        final InternalFactHandle f0 = (InternalFactHandle) wm.insert( p );
        final LeftTupleImpl tuple = new LeftTupleImpl( f0,
                                                       null,
                                                       true );


        RuleTerminalNode rtn = new RuleTerminalNode();

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                                                           accDescr );


        ((MVELCompileable) acc.getAccumulators()[0]).compile( (MVELDialectRuntimeData) pkgBuilder.getPackageRegistry( pkg.getName() ).getDialectRuntimeRegistry().getDialectData( "mvel" ) );


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


        MockLeftTupleSink sink = new MockLeftTupleSink();
        final Cheese cheddar1 = new Cheese( "cheddar",
                                            10 );
        final Cheese cheddar2 = new Cheese( "cheddar",
                                            8 );
        final InternalFactHandle f0 = (InternalFactHandle) wm.insert( new InitialFactImpl() );
        final InternalFactHandle f1 = (InternalFactHandle) wm.insert( cheddar1 );
        final InternalFactHandle f2 = (InternalFactHandle) wm.insert( cheddar2 );
        final LeftTupleImpl tuple = new LeftTupleImpl( f0,
                                               sink,
                                               true );


        Object[] wmContext = acc.createWorkingMemoryContext();

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    public void testHelloWorld() throws Exception {
        // read in the source
        final Reader reader = new InputStreamReader( getClass().getResourceAsStream( "test_mvel.drl" ) );
        RuleBase ruleBase = loadRuleBase( reader );


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


        final List list2 = new ArrayList();
        workingMemory.setGlobal( "list2",
                                 list2 );


        Cheese c = new Cheese( "stilton",
                               10 );
        workingMemory.insert( c );
        workingMemory.fireAllRules();
        assertEquals( 2,
                      list.size() );
        assertEquals( BigInteger.valueOf( 30 ),
                      list.get( 0 ) );
        assertEquals( Integer.valueOf( 22 ),

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


        final WorkingMemory workingMemory = ruleBase.newStatefulSession();


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


        workingMemory.insert( new Person( "bob",
                                          "stilton" ) );
        workingMemory.insert( new Person( "mark",
                                          "brie" ) );


        try {
            workingMemory.fireAllRules();


            assertEquals( "should have fired twice",
                          2,
                          list.size() );

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        builder.build( context, Rule.DEFAULT_CONSEQUENCE_NAME );


        InternalRuleBase ruleBase = (InternalRuleBase)  RuleBaseFactory.newRuleBase();
        PropagationContextFactory pctxFactory = ruleBase.getConfiguration().getComponentFactory().getPropagationContextFactory();
        ruleBase.addPackage( pkg );
        final WorkingMemory wm = ruleBase.newStatefulSession();


        MockLeftTupleSink sink = new MockLeftTupleSink();
        final Cheese cheddar = new Cheese( "cheddar",
                                           10 );
        final InternalFactHandle f0 = (InternalFactHandle) wm.insert( cheddar );
        final LeftTupleImpl tuple = new LeftTupleImpl( f0,
                                               sink,
                                               true );
        f0.removeLeftTuple(tuple);

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        final MVELConsequenceBuilder builder = new MVELConsequenceBuilder();
        builder.build( context, Rule.DEFAULT_CONSEQUENCE_NAME );


        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 LeftTupleImpl tuple = new LeftTupleImpl( f0,
                                               null,
                                               true );


        final AgendaItem item = new AgendaItemImpl( 0,

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        final Package pkg = builder.getPackage();


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


        List list;


        final List l = new ArrayList();
        final Person a = new Person( "a" );
        workingMemory.setGlobal( "a",
                                 a );
        workingMemory.setGlobal( "l",
                                 l );


        workingMemory.fireAllRules();
        list = IteratorToList.convert( workingMemory.iterateObjects( new ClassObjectFilter( a.getClass() ) ) );
        assertEquals( "a still in WM",
                      0,
                      list.size() );
        assertEquals( "Rule should not loop",
                      1,

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