func bind(context: ChannelHandlerContext, to: SocketAddress, promise: EventLoopPromise<Void>?)Called to request that the Channel bind to a specific SocketAddress.
func connect(context: ChannelHandlerContext, to: SocketAddress, promise: EventLoopPromise<Void>?)Called to request that the Channel connect to a given SocketAddress.
func read(context: ChannelHandlerContext)Called to request that the Channel perform a read when data is ready. The read operation will signal that we are ready to read more data.
func register(context: ChannelHandlerContext, promise: EventLoopPromise<Void>?)Called to request that the Channel register itself for I/O events with its EventLoop. This should call context.register to forward the operation to the next _ChannelOutboundHandler in the ChannelPipeline or complete the EventLoopPromise to let the caller know that the operation completed.
func write(context: ChannelHandlerContext, data: NIOAny, promise: EventLoopPromise<Void>?)Called to request a write operation. The write operation will write the messages through the ChannelPipeline. Those are then ready to be flushed to the actual Channel when Channel.flush or ChannelHandlerContext.flush is called.