Trait DeadLetterObserver 

pub trait DeadLetterObserver:
    Send
    + Sync
    + 'static {
    // Required method
    fn on_dead_letter(
        &self,
        recipient: &ActorPath,
        sender: Option<&ActorPath>,
        message_type: &'static str,
    );
}

Implementors are notified whenever a tell fails because the target actor has stopped. Called on the caller’s thread, so implementers should be cheap.

Required Methods

fn on_dead_letter( &self, recipient: &ActorPath, sender: Option<&ActorPath>, message_type: &'static str, )

Implementors