Examples of io.netty.channel.ChannelFutureListener

io.netty.channel.ChannelFutureListener
Listens to the result of a {@link ChannelFuture}. The result of the asynchronous {@link Channel} I/O operation is notified once this listeneris added by calling {@link ChannelFuture#addListener(GenericFutureListener)}.
Return the control to the caller quickly
{@link #operationComplete(Future)} is directly called by an I/Othread. Therefore, performing a time consuming task or a blocking operation in the handler method can cause an unexpected pause during I/O. If you need to perform a blocking operation on I/O completion, try to execute the operation in a different thread using a thread pool.

                    // 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 {
                            pendingWrites.decrementAndGet();
                            closeInput(chunks);
                        }
                    });
                } else if (isWritable()) {
                    f.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws Exception {
                            pendingWrites.decrementAndGet();
                            if (!future.isSuccess()) {
                                closeInput((ChunkedInput<?>) currentEvent);
                            }
                        }
                    });
                } else {
                    f.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws Exception {
                            pendingWrites.decrementAndGet();
                            if (!future.isSuccess()) {
                                closeInput((ChunkedInput<?>) currentEvent);

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                version, compressionLevel, windowBits, memLevel);
    }


    @Override
    public void beforeAdd(ChannelHandlerContext ctx) throws Exception {
        ctx.channel().closeFuture().addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                synchronized (headerBlockCompressor) {
                    if (finished) {
                        return;

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    @Override
    public void channelActive(final ChannelHandlerContext ctx) throws Exception {
        // Once session is secured, send a greeting and register the channel to the global channel
        // list so the channel received the messages from others.
        ctx.pipeline().get(SslHandler.class).handshake().addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                ctx.write(
                        "Welcome to " + InetAddress.getLocalHost().getHostName() +
                        " secure chat service!\n");

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        final Channel channel = regPromise.channel();
        final ChannelPromise promise = channel.newPromise();
        if (regPromise.isDone()) {
            doBind0(regPromise, channel, localAddress, promise);
        } else {
            regPromise.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    doBind0(future, channel, localAddress, promise);
                }
            });

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    public void messageReceived(
            ChannelHandlerContext ctx, final BigInteger msg) {
        receivedMessages ++;
        if (receivedMessages == count) {
            // Offer the answer after closing the connection.
            ctx.channel().close().addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) {
                    boolean offered = answer.offer(msg);
                    assert offered;
                }

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    @Override
    public void close(
            final ChannelHandlerContext ctx,
            final ChannelPromise promise) throws Exception {
        ChannelFuture f = finishEncode(ctx, ctx.newPromise());
        f.addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture f) throws Exception {
                ctx.close(promise);
            }
        });

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    }


    @Override
    public void close(final ChannelHandlerContext ctx, final ChannelPromise promise) throws Exception {
        ChannelFuture f = finishEncode(ctx, ctx.newPromise());
        f.addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture f) throws Exception {
                ctx.close(promise);
            }
        });

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            this.filtersrvController.getFilterServerStatsManager().incGroupGetSize(group, topic,
                bodyTotalSize);
        }


        try {
            ctx.writeAndFlush(response).addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    if (!future.isSuccess()) {
                        log.error("FilterServer response to " + future.channel().remoteAddress() + " failed",
                            future.cause());

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                responseHeader.setQueueOffset(putMessageResult.getAppendMessageResult().getLogicsOffset());


                // 直接返回
                if (!request.isOnewayRPC()) {
                    try {
                        ctx.writeAndFlush(response).addListener(new ChannelFutureListener() {
                            @Override
                            public void operationComplete(ChannelFuture future) throws Exception {
                                if (!future.isSuccess()) {
                                    log.error("SendMessageProcessor response to "
                                            + future.channel().remoteAddress() + " failed", future.cause());

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            try {
                FileRegion fileRegion =
                        new QueryMessageTransfer(response.encodeHeader(queryMessageResult
                            .getBufferTotalSize()), queryMessageResult);
                ctx.channel().writeAndFlush(fileRegion).addListener(new ChannelFutureListener() {
                    @Override
                    public void operationComplete(ChannelFuture future) throws Exception {
                        queryMessageResult.release();
                        if (!future.isSuccess()) {
                            log.error("transfer query message by pagecache failed, ", future.cause());

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Examples of io.netty.channel.ChannelFutureListener

Return the control to the caller quickly

Related Classes of io.netty.channel.ChannelFutureListener