Struct FrameCodec 

pub struct FrameCodec { /* private fields */ }

Tokio codec for RpcMessage over a length-prefixed stream.

Frame layout: [4-byte BE length][msgpack payload]. Maximum frame size is MAX_FRAME_SIZE.

Use this for both the task channel and the control channel — they share the same wire format.

Implementations

impl FrameCodec

pub fn new() -> Self

Create a new codec with the standard 4-byte BE length prefix and 16 MiB max frame size.

Trait Implementations

impl Decoder for FrameCodec

type Item = RpcMessage

The type of decoded frames.

type Error = Error

The type of unrecoverable frame decoding errors.

fn decode(&mut self, src: &mut BytesMut) -> Result<Option<RpcMessage>>

Attempts to decode a frame from the provided buffer of bytes.

fn decode_eof( &mut self, buf: &mut BytesMut, ) -> Result<Option<Self::Item>, Self::Error>

A default method available to be called when there are no more bytes available to be read from the underlying I/O.

fn framed<T>(self, io: T) -> Framed<T, Self>

where T: AsyncRead + AsyncWrite, Self: Sized,

Provides a Stream and Sink interface for reading and writing to this Io object, using Decode and Encode to read and write the raw data.

impl Default for FrameCodec

fn default() -> Self

Returns the “default value” for a type.

impl Encoder<RpcMessage> for FrameCodec

type Error = Error

The type of encoding errors.

fn encode(&mut self, item: RpcMessage, dst: &mut BytesMut) -> Result<()>

Encodes a frame into the buffer provided.