Trait Notification 

pub trait Notification:
    Send
    + Sync
    + 'static { }

Marker trait for messages announcing that something happened, with fan-out semantics: zero or more handlers may react to the same notification.

Unlike crate::Command and crate::Query, a notification has no output and is not expected to be answered. It is broadcast to every handler registered for its type.

The mediator shares a single Arc<N> across every handler, so the value is never deep-cloned per handler and Notification does not require Clone. A handler that needs an owned copy can clone out of the Arc itself.

Example

use hexeract_core::Notification;

struct OrderShipped {
    pub order_id: uuid::Uuid,
}

impl Notification for OrderShipped {}

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors