Examples of org.cometd.client.BayeuxClient$ConnectedState

org.cometd.client.BayeuxClient

eclipse.org/Jetty/Feature/HttpClient">Jetty's HTTP client.

When the communication with the server is finished, the {@link BayeuxClient} can bedisconnected from the Bayeux server.

Typical usage:

 // Handshake String url = "http://localhost:8080/cometd"; BayeuxClient client = new BayeuxClient(url, LongPollingTransport.create(null)); client.handshake(); client.waitFor(1000, BayeuxClient.State.CONNECTED); // Subscription to channels ClientSessionChannel channel = client.getChannel("/foo"); channel.subscribe(new ClientSessionChannel.MessageListener() { public void onMessage(ClientSessionChannel channel, Message message) { // Handle the message } }); // Publishing to channels Map<String, Object> data = new HashMap<String, Object>(); data.put("bar", "baz"); channel.publish(data); // Disconnecting client.disconnect(); client.waitFor(1000, BayeuxClient.State.DISCONNECTED);

        bayeux.setAllowedTransports("long-polling");


        final ClientTransport webSocketTransport = newWebSocketTransport(null);
        final ClientTransport longPollingTransport = newLongPollingTransport(null);
        final CountDownLatch failureLatch = new CountDownLatch(1);
        final BayeuxClient client = new BayeuxClient(cometdURL, webSocketTransport, longPollingTransport)
        {
            @Override
            protected void onTransportFailure(String oldTransportName, String newTransportName, Throwable failure)
            {
                Assert.assertEquals(webSocketTransport.getName(), oldTransportName);
                Assert.assertEquals(longPollingTransport.getName(), newTransportName);
                failureLatch.countDown();
            }
        };


        final CountDownLatch successLatch = new CountDownLatch(1);
        final CountDownLatch failedLatch = new CountDownLatch(1);
        client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                if (message.isSuccessful())
                    successLatch.countDown();
                else
                    failedLatch.countDown();
            }
        });


        client.handshake();


        Assert.assertTrue(failureLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(failedLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(successLatch.await(5, TimeUnit.SECONDS));

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    {
        bayeux.setAllowedTransports("long-polling");


        final ClientTransport webSocketTransport = newWebSocketTransport(null);
        final CountDownLatch failureLatch = new CountDownLatch(1);
        final BayeuxClient client = new BayeuxClient(cometdURL, webSocketTransport)
        {
            @Override
            protected void onTransportFailure(String oldTransportName, String newTransportName, Throwable failure)
            {
                Assert.assertEquals(webSocketTransport.getName(), oldTransportName);
                Assert.assertNull(newTransportName);
                failureLatch.countDown();
            }
        };


        final CountDownLatch failedLatch = new CountDownLatch(1);
        client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                if (!message.isSuccessful())
                    failedLatch.countDown();
            }
        });


        client.handshake();


        Assert.assertTrue(failureLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(failedLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(client.waitFor(5000, BayeuxClient.State.DISCONNECTED));
    }

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        server.start();
    }


    private BayeuxClient newBayeuxClient(String servletPath)
    {
        return new BayeuxClient("http://localhost:" + connector.getLocalPort() + servletPath, newWebSocketTransport());
    }

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    }


    @Test
    public void testMultipleURLMappings() throws Exception
    {
        BayeuxClient client1 = newBayeuxClient(servletPath1);
        client1.handshake();
        Assert.assertTrue(client1.waitFor(5000, BayeuxClient.State.CONNECTED));


        BayeuxClient client2 = newBayeuxClient(servletPath2);
        client2.handshake();
        Assert.assertTrue(client2.waitFor(5000, BayeuxClient.State.CONNECTED));


        String channelName = "/foobarbaz";
        final CountDownLatch messageLatch = new CountDownLatch(4);
        final CountDownLatch subscribeLatch = new CountDownLatch(2);
        client1.getChannel(channelName).subscribe(new ClientSessionChannel.MessageListener()
        {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                messageLatch.countDown();
            }
        }, new ClientSessionChannel.MessageListener()
        {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                subscribeLatch.countDown();
            }
        });
        client2.getChannel(channelName).subscribe(new ClientSessionChannel.MessageListener()
        {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                messageLatch.countDown();
            }
        }, new ClientSessionChannel.MessageListener()
        {
            @Override
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                subscribeLatch.countDown();
            }
        });
        Assert.assertTrue(subscribeLatch.await(5, TimeUnit.SECONDS));


        client1.getChannel(channelName).publish("1");
        client2.getChannel(channelName).publish("2");


        Assert.assertTrue(messageLatch.await(5, TimeUnit.SECONDS));


        client1.disconnect(1000);
        client2.disconnect(1000);
    }

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    {
        final CountDownLatch connectLatch = new CountDownLatch(2);
        ClientTransport webSocketTransport = newWebSocketTransport(null);
        webSocketTransport.setOption(JettyWebSocketTransport.CONNECT_TIMEOUT_OPTION, 1000L);
        ClientTransport longPollingTransport = newLongPollingTransport(null);
        final BayeuxClient client = new BayeuxClient(cometdURL, webSocketTransport, longPollingTransport)
        {
            @Override
            protected boolean sendConnect()
            {
                if ("websocket".equals(getTransport().getName()))
                    connectLatch.countDown();
                return super.sendConnect();
            }
        };


        final CountDownLatch failedLatch = new CountDownLatch(1);
        client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                if (!message.isSuccessful())
                    failedLatch.countDown();
            }
        });


        int port = connector.getLocalPort();
        stopServer();


        client.handshake();
        Assert.assertTrue(failedLatch.await(5, TimeUnit.SECONDS));


        prepareServer(port, null, true);
        startServer();

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    }


    @Test
    public void testAbortThenRestart() throws Exception
    {
        BayeuxClient client = newBayeuxClient();
        client.handshake();


        // Need to be sure that the second connect is sent otherwise
        // the abort and rehandshake may happen before the second
        // connect and the test will fail.
        Thread.sleep(1000);


        client.abort();
        Assert.assertFalse(client.isConnected());


        // Restart
        final CountDownLatch connectLatch = new CountDownLatch(1);
        client.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                if (message.isSuccessful())
                    connectLatch.countDown();
            }
        });
        client.handshake();
        Assert.assertTrue(connectLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(client.isConnected());


        disconnectBayeuxClient(client);
    }

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    @Test
    public void testRestart() throws Exception
    {
        ClientTransport webSocketTransport = newWebSocketTransport(null);
        ClientTransport longPollingTransport = newLongPollingTransport(null);
        final BayeuxClient client = new BayeuxClient(cometdURL, webSocketTransport, longPollingTransport);


        final AtomicReference<CountDownLatch> connectedLatch = new AtomicReference<>(new CountDownLatch(1));
        final AtomicReference<CountDownLatch> disconnectedLatch = new AtomicReference<>(new CountDownLatch(2));
        client.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                if (message.isSuccessful() && "websocket".equals(client.getTransport().getName()))
                    connectedLatch.get().countDown();
                else
                    disconnectedLatch.get().countDown();
            }
        });
        client.handshake();


        // Wait for connect
        Assert.assertTrue(connectedLatch.get().await(10, TimeUnit.SECONDS));
        Assert.assertTrue(client.isConnected());
        Thread.sleep(1000);


        // Stop server
        int port = connector.getLocalPort();
        stopServer();
        Assert.assertTrue(disconnectedLatch.get().await(10, TimeUnit.SECONDS));
        Assert.assertTrue(!client.isConnected());


        // restart server
        connectedLatch.set(new CountDownLatch(1));
        prepareServer(port, null, true);
        startServer();


        // Wait for connect
        Assert.assertTrue(connectedLatch.get().await(10, TimeUnit.SECONDS));
        Assert.assertTrue(client.isConnected());


        disconnectBayeuxClient(client);
    }

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                break;
            default:
                throw new IllegalArgumentException();
        }


        final BayeuxClient client = new BayeuxClient(cometdURL, webSocketTransport);


        final AtomicReference<CountDownLatch> connectedLatch = new AtomicReference<>(new CountDownLatch(1));
        final AtomicReference<CountDownLatch> disconnectedLatch = new AtomicReference<>(new CountDownLatch(2));
        client.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                if (message.isSuccessful() && "websocket".equals(client.getTransport().getName()))
                    connectedLatch.get().countDown();
                else
                    disconnectedLatch.get().countDown();
            }
        });
        client.handshake();


        // Wait for connect
        Assert.assertTrue(connectedLatch.get().await(10, TimeUnit.SECONDS));
        Assert.assertTrue(client.isConnected());
        Thread.sleep(1000);


        // Stop server
        int port = connector.getLocalPort();
        server.stop();
        Assert.assertTrue(disconnectedLatch.get().await(10, TimeUnit.SECONDS));
        Assert.assertTrue(!client.isConnected());


        // restart server
        connector.setPort(port);
        connectedLatch.set(new CountDownLatch(1));
        server.start();


        // Wait for connect
        Assert.assertTrue(connectedLatch.get().await(10, TimeUnit.SECONDS));
        Assert.assertTrue(client.isConnected());


        disconnectBayeuxClient(client);
    }

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                break;
            default:
                throw new IllegalArgumentException();
        }


        final BayeuxClient client = new BayeuxClient(cometdURL, transport);
        client.handshake();
        Assert.assertTrue(client.waitFor(5000, BayeuxClient.State.CONNECTED));


        final String channelName = "/autobatch";
        final CountDownLatch messageLatch = new CountDownLatch(1);
        client.batch(new Runnable()
        {
            public void run()
            {
                ClientSessionChannel channel = client.getChannel(channelName);
                channel.subscribe(new ClientSessionChannel.MessageListener()
                {
                    public void onMessage(ClientSessionChannel channel, Message message)
                    {
                        messageLatch.countDown();

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        });


        Map<String,Object> options = new HashMap<>();
        options.put(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay);
        ClientTransport webSocketTransport = newWebSocketTransport(options);
        final BayeuxClient client = new BayeuxClient(cometdURL, webSocketTransport);


        // Expect 2 failed messages because the client backoffs and retries
        // This way we are sure that the late response from the first
        // expired handshake is not delivered to listeners
        final CountDownLatch latch = new CountDownLatch(2);
        client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener()
        {
            public void onMessage(ClientSessionChannel channel, Message message)
            {
                Assert.assertFalse(message.isSuccessful());
                if (!message.isSuccessful())
                    latch.countDown();
            }
        });


        client.handshake();


        Assert.assertTrue(latch.await(maxNetworkDelay * 2 + client.getBackoffIncrement() * 2, TimeUnit.MILLISECONDS));


        disconnectBayeuxClient(client);
    }

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