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maiko

Trait Topic 

Source 
pub trait Topic<E: Event>:
    Hash
    + PartialEq
    + Eq
    + Clone
    + Send
    + Sync
    + 'static {
    // Required method
    fn from_event(event: &E) -> Self
       where Self: Sized;
}
Expand description

Maps events to routing topics.

Implement this for your own topic type (usually an enum) to classify events for the broker. Actors subscribe to one or more topics, and the broker delivers events to matching subscribers.

Topics must be Send + 'static because they are stored in the broker which runs in a spawned task.

Common patterns:

  • Enum topics for simple classification.
  • Struct topics when you need richer metadata (e.g., names or IDs).

Trait bounds: refer to the event trait as crate::Event in generic signatures to avoid confusion with the Event derive macro.

Required Methods§

Source

fn from_event(event: &E) -> Self
where Self: Sized,

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§