Package org.imixs.workflow.engine.scheduler

Interface Scheduler

  • All Known Implementing Classes:
    WorkflowScheduler
    public interface Scheduler
    This interface is used to implement a Scheduler managed by the SchedulerService.
    Version:
    1.0
    Author:
    rsoika
    See Also:
    SchedulerService

    • Method Detail

      • run

        ItemCollection run​(ItemCollection job)
            throws SchedulerException
        The run method is called by the ScheduelrService during a timer timeout event. The SchedulerService provides a configuration object containing information for the processor of a concrete implementation:
        • type - fixed to value 'scheduler'
        • _scheduler_definition - the chron/calendar definition for the Java EE timer service.
        • _scheduler_enabled - boolean indicates if the scheduler is enabled/disabled
        • _scheduler_class - class name of the scheduler implementation
        • _scheduler_log - optional log information generated by the scheduler implementation
        Beside these standard attributes a scheduler configuration can contain additional application specific information.

        After the run method is finished the scheduelrService will save the scheduler configuration if a configuration object is returned. In case of an exception the Timer service will be canceled. To cancel the timer programmatically, an implementation must set the item _scheduler_enabled to 'false'.

        To start or stop the timer service the methods start() and stop() from the SchedulerService can be called.

        Parameters:
        scheduler - the scheduler configuration
        Returns:
        updated scheduler configuration
        Throws:
        SchedulerException