ChannelFuture() — netty Function Reference

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/AbstractHttp2StreamChannel.java lines 984–1000

        private ChannelFuture writeWindowUpdateFrame(Http2WindowUpdateFrame windowUpdateFrame) {
            ChannelFuture future = write0(parentContext(), windowUpdateFrame);
            // window update frames are commonly swallowed by the Http2FrameCodec and the promise is synchronously
            // completed but the flow controller _may_ have generated a wire level WINDOW_UPDATE. Therefore we need,
            // to assume there was a write done that needs to be flushed or we risk flow control starvation.
            writeDoneAndNoFlush = true;
            // Add a listener which will notify and teardown the stream
            // when a window update fails if needed or check the result of the future directly if it was completed
            // already.
            // See https://github.com/netty/netty/issues/9663
            if (future.isDone()) {
                windowUpdateFrameWriteComplete(future, AbstractHttp2StreamChannel.this);
            } else {
                future.addListener(windowUpdateFrameWriteListener);
            }
            return future;
        }