Examples of org.drools.runtime.Channel

org.drools.runtime.Channel
A channel provides a mechanism to send objects from the working memory to some external process or function. For instance, a channel can be used to inform some piece of code that an object matches a rule.

To create a channel, implement the interface and register it with the KnowledgeRuntime:
```
 ... ksession.registerChannel("my-channel", new MyChannelImpl()); 
```
Channels are invoked from the consequence side of a rule:
```
 when ... then channels["my-channel"].send(...); 
```

    @Test
    public void testChannels() throws IOException, ClassNotFoundException {
        KnowledgeBase kbase = getKnowledgeBase( "test_Channels.drl" );
        StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        
        Channel someChannel = mock( Channel.class );
        ksession.registerChannel( "someChannel", someChannel );
        
        ksession.insert( new Cheese( "brie", 30 ) );
        ksession.insert( new Cheese( "stilton", 5 ) );

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    @Override
    public Map<String, Channel> getChannels() {
        Map<String, Channel> channels = new HashMap<String, Channel>();
        for (final Map.Entry<String, org.kie.api.runtime.Channel> entry : delegate.getChannels().entrySet()) {
            channels.put(entry.getKey(), new Channel() {
                @Override
                public void send(Object object) {
                    entry.getValue().send(object);
                }
            });

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    @Override
    public Map<String, Channel> getChannels() {
        Map<String, Channel> channels = new HashMap<String, Channel>();
        for (final Map.Entry<String, org.kie.api.runtime.Channel> entry : delegate.getChannels().entrySet()) {
            channels.put(entry.getKey(), new Channel() {
                @Override
                public void send(Object object) {
                    entry.getValue().send(object);
                }
            });

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        JLabel lblScore = new JLabel("Score");
        scorePanel.add(lblScore);
        
        final JTextField txtScore = new JTextField();
        gameView.getKsession().getChannels().put( "score", new Channel() {            
            public void send(Object object) {
                txtScore.setText( "" + ((Score ) object).getValue() );
            }
        } );

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        clientKBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );        


        final StatefulKnowledgeSession serverKsession = serverKBase.newStatefulKnowledgeSession();        
        final StatefulKnowledgeSession clientKsession = clientKBase.newStatefulKnowledgeSession();
        
        serverKsession.getChannels().put( "sensors", new Channel() {            
            public void send(Object object) {
                clientKsession.insert( object );
                clientKsession.fireAllRules();
            }
        } );
        
        clientKsession.getChannels().put( "commands", new Channel() {            
            public void send(Object object) {
                serverKsession.insert( object ); 
                serverKsession.fireAllRules();
            }
        } );

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Related Classes of org.drools.runtime.Channel

org.drools.games.wumpus.view.GameUI

org.drools.games.wumpus.WumpusWorldMain

org.drools.impl.adapters.KnowledgeRuntimeAdapter

org.drools.integrationtests.IntegrationInterfacesTest

org.jboss.internal.soa.esb.services.rules.DroolsRuleBaseState

org.jboss.internal.soa.esb.services.rules.RuleServiceCallHelper

org.jboss.internal.soa.esb.services.rules.RuleServiceCallHelperUnitTest

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