Examples of io.netty.channel.ChannelFuture.addListener()

io.netty.channel.ChannelFuture.addListener()

            sendFileFuture =
                    ctx.write(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, 8192)),
                            ctx.newProgressivePromise());
        }


        sendFileFuture.addListener(new ChannelProgressiveFutureListener() {
            @Override
            public void operationProgressed(ChannelProgressiveFuture future, long progress, long total) {
                if (total < 0) { // total unknown
                    System.err.println(future.channel() + " Transfer progress: " + progress);
                } else {

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        ChannelFuture lastContentFuture = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);


        // Decide whether to close the connection or not.
        if (!HttpHeaders.isKeepAlive(request)) {
            // Close the connection when the whole content is written out.
            lastContentFuture.addListener(ChannelFutureListener.CLOSE);
        }
    }


    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {

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            final WebSocketServerHandshaker handshaker = wsFactory.newHandshaker(req);
            if (handshaker == null) {
                WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());
            } else {
                final ChannelFuture handshakeFuture = handshaker.handshake(ctx.channel(), req);
                handshakeFuture.addListener(new ChannelFutureListener() {
                    @Override
                    public void operationComplete(ChannelFuture future) throws Exception {
                        if (!future.isSuccess()) {
                            ctx.fireExceptionCaught(future.cause());
                        } else {

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    }


    private static void sendHttpResponse(ChannelHandlerContext ctx, HttpRequest req, HttpResponse res) {
        ChannelFuture f = ctx.channel().writeAndFlush(res);
        if (!isKeepAlive(req) || res.getStatus().code() != 200) {
            f.addListener(ChannelFutureListener.CLOSE);
        }
    }


    private static String getWebSocketLocation(ChannelPipeline cp, HttpRequest req, String path) {
        String protocol = "ws";

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                    // Register a listener which will close the input once the write is complete.
                    // This is needed because the Chunk may have some resource bound that can not
                    // be closed before its not written.
                    //
                    // See https://github.com/netty/netty/issues/303
                    f.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws Exception {
                            currentWrite.progress(amount);
                            currentWrite.success();
                            closeInput(chunks);

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                            currentWrite.success();
                            closeInput(chunks);
                        }
                    });
                } else if (channel.isWritable()) {
                    f.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws Exception {
                            if (!future.isSuccess()) {
                                closeInput((ChunkedInput<?>) pendingMessage);
                                currentWrite.fail(future.cause());

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                                currentWrite.progress(amount);
                            }
                        }
                    });
                } else {
                    f.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws Exception {
                            if (!future.isSuccess()) {
                                closeInput((ChunkedInput<?>) pendingMessage);
                                currentWrite.fail(future.cause());

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        WebSocketServerHandshakerFactory factory =
                new WebSocketServerHandshakerFactory(getWebSocketLocation(req), null, false, configuration.getMaxFramePayloadLength());
        WebSocketServerHandshaker handshaker = factory.newHandshaker(req);
        if (handshaker != null) {
            ChannelFuture f = handshaker.handshake(channel, req);
            f.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    if (!future.isSuccess()) {
                        log.error("Can't handshake " + sessionId, future.cause());
                        return;

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            } else {
                ctx.write(new ChunkedNioFile(file.getChannel()));
            }
            ChannelFuture future = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
            if (!keepAlive) {
                future.addListener(ChannelFutureListener.CLOSE);
            }
        }
    }


    private static void send100Continue(ChannelHandlerContext ctx) {

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    private void scheduleDisconnect(Channel channel, final UUID sessionId) {
        final SchedulerKey key = new SchedulerKey(Type.CLOSE_TIMEOUT, sessionId);
        scheduler.cancel(key);
        ChannelFuture future = channel.closeFuture();
        future.addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                scheduler.scheduleCallback(key, new Runnable() {
                    @Override
                    public void run() {

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