Examples of org.drools.runtime.rule.WorkingMemoryEntryPoint

org.drools.runtime.rule.WorkingMemoryEntryPoint
An entry-point is an abstract channel through where facts are inserted into the engine.

Drools 5 supports multiple entry-points into a single StatefulKnowledgeBase: the default, anonymous entry-point, as well as as many user declared entry points the application requires.

To get a reference to an entry point, just request the session:
```
 StatefulKnowledgeSession session = kbase.newStatelessKnowledgeSession(); ... WorkingMemoryEntryPoint entrypoint = session.getWorkingMemoryEntryPoint("my entry point"); 
```
Once a reference to an entry point is acquired, the application can insert, update and retract facts to/from that entry-point as usual:
```
 ... FactHandle factHandle = entrypoint.insert( fact ); ... entrypoint.update( factHandle, newFact ); ... entrypoint.retract( factHandle ); ... 
```

        StockTick tick8 = new StockTick( 8,
                                         "DROO",
                                         50,
                                         System.currentTimeMillis() );


        WorkingMemoryEntryPoint entry = session.getWorkingMemoryEntryPoint( "StockStream" );


        InternalFactHandle handle5 = (InternalFactHandle) entry.insert( tick5 );
        InternalFactHandle handle6 = (InternalFactHandle) entry.insert( tick6 );
        InternalFactHandle handle7 = (InternalFactHandle) entry.insert( tick7 );
        InternalFactHandle handle8 = (InternalFactHandle) entry.insert( tick8 );


        assertNotNull( handle5 );
        assertNotNull( handle6 );
        assertNotNull( handle7 );
        assertNotNull( handle8 );

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        StockTick tick8 = new StockTick( 8,
                                         "DROO",
                                         50,
                                         System.currentTimeMillis() );


        WorkingMemoryEntryPoint entry = session.getWorkingMemoryEntryPoint( "stream1" );


        InternalFactHandle handle5 = (InternalFactHandle) entry.insert( tick5 );
        InternalFactHandle handle6 = (InternalFactHandle) entry.insert( tick6 );
        InternalFactHandle handle7 = (InternalFactHandle) entry.insert( tick7 );
        InternalFactHandle handle8 = (InternalFactHandle) entry.insert( tick8 );


        assertNotNull( handle5 );
        assertNotNull( handle6 );
        assertNotNull( handle7 );
        assertNotNull( handle8 );

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        rbase.getRete().addObjectSink( epn );
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        org.drools.runtime.rule.FactHandle f1 = ksession.insert( "f1" );
        
        WorkingMemoryEntryPoint ep = ksession.getWorkingMemoryEntryPoint( "xxx" );
        try {
            ep.update( f1, "s1" );
            fail( "Should throw an exception" );
        } catch ( IllegalArgumentException e ) {
            
        }
       
        try {
            ep.retract( f1 );
            fail( "Should throw an exception" );
        } catch ( IllegalArgumentException e ) {
            
        }

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        int strategyIndex = context.stream.readInt();
        ObjectMarshallingStrategy strategy = context.resolverStrategyFactory.getStrategy( strategyIndex );
        Object object = strategy.read( context.stream );
        
        WorkingMemoryEntryPoint entryPoint = null;
        if(context.readBoolean()){
            String entryPointId = context.readUTF();
            if(entryPointId != null && !entryPointId.equals("")){
                entryPoint = context.wm.getEntryPoints().get(entryPointId);
            }

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                "end";


        KnowledgeBase kbase = loadKnowledgeBaseFromString(str);
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();


        WorkingMemoryEntryPoint entryPoint = ksession.getWorkingMemoryEntryPoint("x");
        assertNull(entryPoint);
    }

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        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( Collections.singletonList( kpkg ) );
        
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        WorkingMemoryEntryPoint ep = ksession.getWorkingMemoryEntryPoint( "EventStream" );
        ep.insert( "Hello World!" );
        int rules = ksession.fireAllRules();
        assertEquals( 1, rules );


    }

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    public Collection<FactHandle> execute(Context context) {
        StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();
        List<FactHandle> handles = new ArrayList<FactHandle>();
        
        WorkingMemoryEntryPoint wmep;
        if ( StringUtils.isEmpty( this.entryPoint ) ) {
            wmep = ksession;
        } else {
            wmep = ksession.getWorkingMemoryEntryPoint( this.entryPoint );
        }

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        this.setters = setters;
    }


    public Object execute(Context context) {
        StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();
        WorkingMemoryEntryPoint wmep = ksession.getWorkingMemoryEntryPoint( ((InternalFactHandle)handle).getEntryPoint().getEntryPointId() );
        
        Object object = wmep.getObject( this.handle );
        MVEL.eval( getMvelExpr(),
                   object );


        wmep.update( handle,
                        object );
        return object;
    }

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        if( this.factory.getKnowledgeHelper() != null ) {
            decl = this.factory.getKnowledgeHelper().getDeclaration( this.declaration.getIdentifier() );
            
            InternalFactHandle factHandle = (InternalFactHandle)this.factory.getFactHandle(decl);
            WorkingMemoryEntryPoint entryPoint = factHandle.getEntryPoint();
            if(entryPoint !=  null){


                this.factory.getKnowledgeHelper()
                        .getIdentityMap()
                        .put(entryPoint.getObject(factHandle), factHandle);
            }
        }

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        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();


        kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        final StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        final WorkingMemoryEntryPoint ep = ksession.getWorkingMemoryEntryPoint( "testep" );


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


        ksession.insert( new Cheese( "cheddar" ) );
        ksession.fireAllRules();


        Runnable fireUntilHalt = new Runnable() {
            public void run() {
                ksession.fireUntilHalt();
            }
        };


        Thread t1 = new Thread( fireUntilHalt );
        t1.start();


        Thread.currentThread().sleep( 500 );
        ep.insert( new Person( "darth" ) );
        Thread.currentThread().sleep( 500 );
        ksession.halt();
        t1.join( 5000 );
        boolean alive = t1.isAlive();
        if ( alive ) {

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Related Classes of org.drools.runtime.rule.WorkingMemoryEntryPoint

org.drools.base.mvel.DroolsMVELPreviousDeclarationVariable

org.drools.camel.component.DroolsInsertProducer

org.drools.command.runtime.rule.GetFactHandleInEntryPointCommand

org.drools.command.runtime.rule.GetFactHandlesInEntryPointCommand

org.drools.command.runtime.rule.GetObjectInEntryPointCommand

org.drools.command.runtime.rule.GetObjectsInEntryPointCommand

org.drools.command.runtime.rule.GetWorkingMemoryEntryPointCommand

org.drools.command.runtime.rule.InsertElementsCommand

org.drools.command.runtime.rule.InsertObjectInEntryPointCommand

org.drools.command.runtime.rule.ModifyCommand

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