Examples of io.netty.channel.Channel

io.netty.channel.Channel
ore.org/">BEEP and SSH do.
Downcast to access transport-specific operations

Some transports exposes additional operations that is specific to the transport. Down-cast the {@link Channel} to sub-type to invoke suchoperations. For example, with the old I/O datagram transport, multicast join / leave operations are provided by {@link DatagramChannel}.

            // set the pipeline factory, which creates the pipeline for each newly created channels
            connectionlessClientBootstrap.handler(pipelineFactory);
            // bind and store channel so we can close it when stopping
            ChannelFuture channelFuture = connectionlessClientBootstrap.bind(new InetSocketAddress(0));
            channelFuture.awaitUninterruptibly();
            Channel channel = channelFuture.channel();
            allChannels.add(channel);
            answer = connectionlessClientBootstrap.connect(new InetSocketAddress(configuration.getHost(), configuration.getPort()));


            if (LOG.isDebugEnabled()) {
                LOG.debug("Created new UDP client bootstrap connecting to {}:{} with options: {}",

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            if (channelFuture.cause() != null) {
                cause.initCause(channelFuture.cause());
            }
            throw cause;
        }
        Channel answer = channelFuture.channel();
        // to keep track of all channels in use
        allChannels.add(answer);


        if (LOG.isDebugEnabled()) {
            LOG.debug("Creating connector to address: {}", configuration.getAddress());

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    private final class NettyProducerPoolableObjectFactory implements PoolableObjectFactory<Channel> {


        @Override
        public Channel makeObject() throws Exception {
            ChannelFuture channelFuture = openConnection();
            Channel answer = openChannel(channelFuture);
            LOG.trace("Created channel: {}", answer);
            return answer;
        }

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    // HACK so we send all message from the same thread
    private final Executor singleThread = Executors.newSingleThreadExecutor();


    @Override
    public void send(final LobbySession key, final Message message) {
        final Channel chc = getChannel(key);
        if (chc!=null) {
            if (DEBUG_SEND) {
                logger.log(Level.FINE, "sending "+System.identityHashCode(message)+" "+message);
            }
            // HACK to fix ordering of messages
            singleThread.execute(new Runnable() { @Override public void run() {
                try {
                    chc.writeAndFlush(message);
                }
                catch (Exception ex) {
                    logger.log(Level.WARNING,"Failed to send "+key+" "+message,ex);
                }
            }});

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        }
    }


    @Override
    public void kick(LobbySession key) {
        Channel chc = getChannel(key);
        if (chc!=null) {
            chc.close();
        }
        else {
            logger.warning("LobbySession: "+key+" NOT FOUND! can not kick");
        }
    }

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        }
    }


    @Override
    public boolean isConnected(LobbySession key) {
        Channel chc = getChannel(key);
        if (chc!=null) {
            return chc.isOpen();
        }
        else {
            return false;
        }
    }

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    public void nodeStartsMinConnections() throws InterruptedException, UnknownHostException
    {
        final int MIN_CONNECTIONS = 5;


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();
        doReturn(future).when(future).await();

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    public void NodeRespectsMax() throws InterruptedException, UnknownHostException, Exception
    {
        final int MAX_CONNECTIONS = 2;


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();
        doReturn(future).when(future).await();

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    public void channelsReturnedCorrectly() throws InterruptedException, UnknownHostException, Exception
    {
        final int MAX_CONNECTIONS = 1;


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();
        doReturn(future).when(future).await();

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    @Test
    public void healthCheckChangesState()
        throws InterruptedException, UnknownHostException, Exception
    {
        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();
        doReturn(future).when(future).await();

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Examples of io.netty.channel.Channel

Downcast to access transport-specific operations

Related Classes of io.netty.channel.Channel