Examples of org.cometd.client.ext.AckExtension

org.cometd.client.ext.AckExtension

This client-side extension enables the client to acknowledge to the server the messages that the client has received.

For the acknowledgement to work, the server must be configured with the correspondent server-side ack extension. If both client and server support the ack extension, then the ack functionality will take place automatically. By enabling this extension, all messages arriving from the server will arrive via the long poll, so the comet communication will be slightly chattier. The fact that all messages will return via long poll means also that the messages will arrive with total order, which is not guaranteed if messages can arrive via both long poll and normal response. Messages are not acknowledged one by one, but instead a group of messages is acknowledged when long poll returns.

    public void testWebSocketWithAckExtension() throws Exception
    {
        final BayeuxClient client = newBayeuxClient();


        bayeux.addExtension(new AcknowledgedMessagesExtension());
        client.addExtension(new AckExtension());


        final String channelName = "/chat/demo";
        final BlockingQueue<Message> messages = new BlockingArrayQueue<>();
        client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener()
        {

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    {
        bayeux.addExtension(new AcknowledgedMessagesExtension());


        final String channelName = "/service/test";
        BayeuxClient client = newBayeuxClient();
        client.addExtension(new AckExtension());


        final CountDownLatch latch = new CountDownLatch(1);
        client.getChannel(channelName).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)

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        bayeux.addExtension(new AcknowledgedMessagesExtension());


        final BayeuxClient client = newBayeuxClient();
        final String channelName = "/test";
        final AtomicReference<CountDownLatch> rcv = new AtomicReference<CountDownLatch>(new CountDownLatch(1));
        client.addExtension(new AckExtension());
        client.addExtension(new ClientSession.Extension.Adapter()
        {
            @Override
            public boolean rcv(ClientSession session, Message.Mutable message)
            {

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                    present = true;
                    break;
                }
            }
            if (!present)
                oortComet.addExtension(new AckExtension());
        }
    }

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                return true;
            }
        });


        final BayeuxClient client = newBayeuxClient();
        client.addExtension(new AckExtension());
        client.setOption(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay);
        client.setOption(BayeuxClient.BACKOFF_INCREMENT_OPTION, 0);


        final CountDownLatch messageLatch1 = new CountDownLatch(1);
        final CountDownLatch messageLatch2 = new CountDownLatch(1);

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                return true;
            }
        });


        final BayeuxClient client = newBayeuxClient();
        client.addExtension(new AckExtension());
        client.setOption(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay);
        client.setOption(BayeuxClient.BACKOFF_INCREMENT_OPTION, 0);


        final CountDownLatch messageLatch1 = new CountDownLatch(1);
        final CountDownLatch messageLatch2 = new CountDownLatch(1);

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        private LoadBayeuxClient(String url, ScheduledExecutorService scheduler, ClientTransport transport, ClientSessionChannel.MessageListener listener, boolean enableAckExtension)
        {
            super(url, scheduler, transport);
            this.latencyListener = listener;
            if (enableAckExtension)
                addExtension(new AckExtension());
        }

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Related Classes of org.cometd.client.ext.AckExtension

org.cometd.benchmark.client.BayeuxLoadClient$LoadBayeuxClient

org.cometd.client.MetaConnectFailureWithAckExtensionTest

org.cometd.oort.Oort

org.cometd.websocket.client.BayeuxClientWebSocketTest

org.cometd.websocket.client.MetaConnectFailureWithAckExtensionTest

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