Trait Recipe

pub trait Recipe {
    type Output;

    // Required methods
    fn hash(&self, state: &mut FxHasher);
    fn stream(
        self: Box<Self>,
        input: Pin<Box<dyn Stream<Item = Event> + Send>>,
    ) -> Pin<Box<dyn Stream<Item = Self::Output> + Send>>;
}

The description of a Subscription.

A Recipe is the internal definition of a Subscription. It is used by runtimes to run and identify subscriptions. You can use it to create your own!

Examples

The repository has a couple of examples that use a custom Recipe:

• download_progress, a basic application that asynchronously downloads a dummy file of 100 MB and tracks the download progress.
• stopwatch, a watch with start/stop and reset buttons showcasing how to listen to time.

Required Associated Types

type Output

The events that will be produced by a Subscription with this Recipe.

Required Methods

fn hash(&self, state: &mut FxHasher)

Hashes the Recipe.

This is used by runtimes to uniquely identify a Subscription.

fn stream( self: Box<Self>, input: Pin<Box<dyn Stream<Item = Event> + Send>>, ) -> Pin<Box<dyn Stream<Item = Self::Output> + Send>>

Executes the Recipe and produces the stream of events of its Subscription.

Implementors