Enum SupervisionStrategy 

pub enum SupervisionStrategy {
    Stop,
    Restart(RestartConfig),
    Escalate,
}

Supervision strategy for handling actor failures.

Strategies form a lattice compatible with the Outcome severity model:

• Stop is the default for unhandled failures
• Restart can recover from transient failures
• Escalate propagates failures up the region hierarchy

Monotonicity

Supervision decisions are monotone: once an outcome is determined to be severe (e.g., Panicked), it cannot be downgraded by supervision. A restart that itself fails escalates the severity.

Variants

Stop

Stop the actor immediately on any error.

The actor’s on_stop is called, and the failure is recorded. The region continues running other tasks.

Restart(RestartConfig)

Restart the actor on error with configurable limits.

Restarts are rate-limited by a sliding window. If the restart limit is exceeded, the strategy escalates to SupervisionStrategy::Stop.

Escalate

Escalate the failure to the parent region.

The parent region’s supervision policy handles the failure. If there is no parent (root region), this behaves like SupervisionStrategy::Stop.

Trait Implementations

impl Clone for SupervisionStrategy

fn clone(&self) -> SupervisionStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SupervisionStrategy

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

Formats the value using the given formatter.

impl Default for SupervisionStrategy

fn default() -> SupervisionStrategy

Returns the “default value” for a type.

impl PartialEq for SupervisionStrategy

fn eq(&self, other: &SupervisionStrategy) -> 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 Eq for SupervisionStrategy

impl StructuralPartialEq for SupervisionStrategy