Struct ChannelContext 

pub struct ChannelContext {
    pub identifier: String,
    /* private fields */
}

Per-subscription context handed to a Channel’s lifecycle callbacks. It carries the ActionCable identifier, an outbound sink to this connection, and the pub/sub backend, so a channel can transmit, stream_from, read params, and stop_all_streams (Rails ActionCable::Channel).

Fields

identifier: String

The raw ActionCable subscription identifier (a JSON string).

Implementations

impl ChannelContext

pub fn for_test( identifier: impl Into<String>, ) -> (Self, UnboundedReceiver<String>)

A context wired to a fresh channel and in-memory pub/sub, returning the receiving end so tests can observe transmit/stream_from output.

pub fn params(&self) -> Value

The subscription params: the parsed ActionCable identifier JSON (e.g. { "channel": "ChatChannel", "room": "42" }), or Null if unparseable.

pub fn transmit(&self, message: Value)

Send a message to just this connection (Rails transmit). Wrapped as an ActionCable ServerMessage carrying this subscription’s identifier.

pub async fn stream_from(&self, stream: &str)

Subscribe this connection to stream: anything published to it (e.g. via Cable::broadcast) is forwarded to the client (Rails stream_from).

pub async fn stop_all_streams(&self)

Stop forwarding every stream this connection subscribed to (Rails stop_all_streams).