Trait fp_rust::common::Observable

pub trait Observable<X, T: Subscription<X>> {
    fn add_observer(&mut self, observer: Arc<T>);
    fn delete_observer(&mut self, observer: Arc<T>);
    fn notify_observers(&mut self, x: Arc<X>);
}

Observable memorizes all Subscription and send notifications.

Arguments

• X - The generic type of broadcasted data
• T - The generic type implementing trait Subscription

Remarks

This is an implementation of Observer Pattern of GoF.

NOTE: Inspired by and modified from https://github.com/eliovir/rust-examples/blob/master/design_pattern-observer.rs

Required methods

fn add_observer(&mut self, observer: Arc<T>)

Add a Subscription.

Arguments

• observer - The given Subscription.

fn delete_observer(&mut self, observer: Arc<T>)

Remove the observer.

Arguments

• observer - The given Subscription.

fn notify_observers(&mut self, x: Arc<X>)

Notify all Subscription subscribers with a given value Arc<X>.

Arguments

• x - The given Arc<X> value for broadcasting.

Implementors

impl<X: Send + Sync + 'static> Observable<X, SubscriptionFunc<X>> for Publisher<X>