Struct Scheduler 

pub struct Scheduler { /* private fields */ }

Available on non-WebAssembly only.

A @Scheduled-style background task runner.

Register tasks with .every(), .after(), or .cron(), then call .start() to spawn one dedicated background thread per task.

Implementations

impl Scheduler

pub fn new() -> Self

pub fn every( self, interval: Duration, task: impl Fn() + Send + Sync + 'static, ) -> Self

Run task every interval, measured from the start of the previous run. If the task takes longer than interval, the next run starts immediately.

pub fn after( self, delay: Duration, task: impl Fn() + Send + Sync + 'static, ) -> Self

Run task with delay between the end of one run and the start of the next.

pub fn cron( self, expr: &str, task: impl Fn() + Send + Sync + 'static, ) -> Result<Self, String>

Run task according to a 6-field cron expression.

Format: "second minute hour day-of-month month day-of-week" (UTC).

Each field supports *, an exact value, */step, an N-M range, and comma-separated combinations, e.g. "0,30 * * * * *" fires at seconds 0 and 30.

Day-of-week: 0 = Sunday, 6 = Saturday.

pub fn initial_delay(self, delay: Duration) -> Self

Add an initial delay before the first run of the most recently registered task.

pub fn start(self)

Spawn one background thread per registered task and return immediately. Threads run for the lifetime of the process.

Trait Implementations

impl Default for Scheduler

fn default() -> Self

Returns the “default value” for a type.