Package org.apache.tapestry5.ioc.services.cron

## Interface Schedule

- All Known Implementing Classes:
    `CronSchedule`, `IntervalSchedule`

      public interface Schedule

  Used with `PeriodicExecutor` to control the schedule for when jobs execute.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `long` | `firstExecution()` | For a newly created job, what is the start time for the job.
    `long` | `nextExecution​(long previousExecution)` | Computes the next execution time for a job.

- - ### Method Detail

    - #### firstExecution

          long firstExecution()

      For a newly created job, what is the start time for the job. Often, the current clock time is returned, to start a job as soon as possible.
      Returns:
        start time for new job, in system clock millis

    - #### nextExecution

          long nextExecution​(long previousExecution)

      Computes the next execution time for a job.
      Parameters:
        `previousExecution` - time of previous execution (in system clock millis)
      Returns:
        time of next execution (in system clock millis) or a value <= 0 to cancel the job's execution