Struct rust_cast::message_manager::MessageManager

pub struct MessageManager<S>where
    S: Write + Read,{ /* private fields */ }

Static structure that is responsible for (de)serializing and sending/receiving Cast protocol messages.

Implementations

impl<S> MessageManager<S>where
    S: Write + Read,

pub fn new(stream: S) -> Self

pub fn send(&self, message: CastMessage) -> Result<(), Error>

Sends message to the Cast Device.

Arguments

• message - CastMessage instance to be sent to the Cast Device.

pub fn receive(&self) -> Result<CastMessage, Error>

Waits for the next CastMessage available. Can also return existing message from the internal message buffer containing messages that have been received previously, but haven’t been consumed for some reason (e.g. during receive_find_map call).

Return value

Result containing parsed CastMessage or Error.

pub fn receive_find_map<F, B>(&self, f: F) -> Result<B, Error>where
    F: Fn(&CastMessage) -> Result<Option<B>, Error>,

Waits for the next CastMessage for which f returns valid mapped value. Messages in which f is not interested are placed into internal message buffer and can be later retrieved with receive. This method always reads from the stream.

Example

message_manager.receive_find_map(|message| {
  if !can_handle(message) {
    return Ok(None);
  }

  parse(message);

  Ok(Some(()))
})?;

Arguments

• f - Function that analyzes and maps CastMessage to any other type. If message doesn’t look like something f is looking for, then Ok(None) should be returned so that message is not lost and placed into internal message buffer for later retrieval.

Return value

Result containing parsed CastMessage or Error.

pub fn generate_request_id(&self) -> i32

Generates unique integer number that is used in some requests to map them with the response.

Return value

Unique (in the scope of this particular MessageManager instance) integer number.