Trait UnreliablePolicy 

pub trait UnreliablePolicy: Sized {
    type Overflow: Overflow<Self>;

    // Required method
    fn handle(overflow: &mut Self::Overflow, message: Self) -> bool;
}

Overflow behavior for actor messages that can be rejected when an inbox is full.

Required Associated Types

type Overflow: Overflow<Self>

Overflow storage used by this policy.

Required Methods

fn handle(overflow: &mut Self::Overflow, message: Self) -> bool

Unreliably handle message when it cannot enter the bounded ready queue immediately.

Returns true when the policy considered the message’s effects. This includes retaining the message, coalescing it with retained work, replacing older retained work, or deliberately doing no work because the message is already satisfied, superseded, or no longer needed.

Returns false only when the policy rejects the message under backpressure without retaining, coalescing, replacing, or otherwise handling it. This is the unreliable case: the submitted work was not semantically handled, and callers that care should retry or treat the submission as failed.

Warning

Do not enqueue into the same mailbox from this method or from destructors triggered by editing overflow. This method runs while the mailbox holds its overflow lock, so same mailbox re-entry can deadlock.

This method should not unwind after mutating overflow. A panic, including one from a destructor triggered while editing overflow, can leave retained overflow data stranded in the mailbox.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors