Struct ChildSpec

pub struct ChildSpec {
    pub id: String,
    pub restart: Restart,
    pub spawn_fn: SpawnFn,
    pub backoff_fn: Option<ChildBackoffFn>,
    pub restart_counter_reset_after: Option<u64>,
}

Defines how to spawn and manage a single child actor.

Fields

id: String

Unique child ID string (for logging, meltdown log, etc.).

restart: Restart

Restart policy for this child. Restart::Permanent, Restart::Transient, Restart::Temporary.

spawn_fn: SpawnFn

The user-defined spawn closure. If this fails, meltdown is triggered if repeated too often.

backoff_fn: Option<ChildBackoffFn>

A child-level backoff function. If set, this can delay re-spawning the child after a crash.

restart_counter_reset_after: Option<u64>

Optional child-level meltdown “reset.” If the child hasn’t failed in restart_counter_reset_after seconds, we reset this child’s failure count to 0 next time it fails.

This is separate from the supervisor-level meltdown logic in SupervisorOptions.