Enum Directive 

#[non_exhaustive]
pub enum Directive {
    Resume,
    Restart,
    Stop,
    Escalate,
    Throttle {
        factor: f32,
        window: Duration,
    },
    Suspend {
        mode: SuspendMode,
    },
    ResumeFrom(SuspendMode),
}

What the supervisor decides when a child fails — or, for the graded variants, how it should degrade a still-running child.

Resume/Restart/Stop/Escalate are the classic crash-recovery directives. Throttle/Suspend/ResumeFrom are graded operating-mode changes (FR-6): the supervisor pushes them into a running child via Actor::on_directive without a restart, so the child’s state is preserved. This lets a risk circuit breaker reduce order rate/size or move to flat-only instead of bouncing the actor.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Resume

Restart

Stop

Escalate

Throttle

Reduce the child’s effective rate/size by factor (e.g. 0.25 = quarter) for at least window. Applied without restart.

Fields

factor: f32

window: Duration

Suspend

Move the child into a restricted operating mode without restart.

Fields

mode: SuspendMode

ResumeFrom(SuspendMode)

Step the child back up the ladder to a less-restrictive mode.

Trait Implementations

impl Clone for Directive

fn clone(&self) -> Directive

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Directive

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Directive

fn eq(&self, other: &Directive) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Directive

impl Eq for Directive

impl StructuralPartialEq for Directive