Method Detail

• channelHandlerContext

  void channelHandlerContext​(ChannelHandlerContext ctx)
                      throws Http2Exception

  Set the ChannelHandlerContext for which to apply flow control on.

  This must be called to properly initialize the Http2FlowController. Not calling this is considered a programming error.

  Parameters:

  ctx - The ChannelHandlerContext for which to apply flow control on.

  Throws:

  Http2Exception - if any protocol-related error occurred.

• initialWindowSize

  void initialWindowSize​(int newWindowSize)
                  throws Http2Exception

  Sets the connection-wide initial flow control window and updates all stream windows (but not the connection stream window) by the delta.

  Represents the value for SETTINGS_INITIAL_WINDOW_SIZE. This method should only be called by Netty (not users) as a result of a receiving a SETTINGS frame.

  Parameters:

  newWindowSize - the new initial window size.

  Throws:

  Http2Exception - thrown if any protocol-related error occurred.

• initialWindowSize

  int initialWindowSize()

  Gets the connection-wide initial flow control window size that is used as the basis for new stream flow control windows.

  Represents the value for SETTINGS_INITIAL_WINDOW_SIZE. The initial value returned by this method must be Http2CodecUtil.DEFAULT_WINDOW_SIZE.

• windowSize

  int windowSize​(Http2Stream stream)

  Get the portion of the flow control window for the given stream that is currently available for sending/receiving frames which are subject to flow control. This quantity is measured in number of bytes.

• incrementWindowSize

  void incrementWindowSize​(Http2Stream stream,
                           int delta)
                    throws Http2Exception

  Increments the size of the stream's flow control window by the given delta.

  In the case of a Http2RemoteFlowController this is called upon receipt of a WINDOW_UPDATE frame from the remote endpoint to mirror the changes to the window size.

  For a Http2LocalFlowController this can be called to request the expansion of the window size published by this endpoint. It is up to the implementation, however, as to when a WINDOW_UPDATE is actually sent.

  Parameters:

  stream - The subject stream. Use Http2Connection.connectionStream() for requesting the size of the connection window.

  delta - the change in size of the flow control window.

  Throws:

  Http2Exception - thrown if a protocol-related error occurred.