com.sun.sgs.kernel
Interface PriorityScheduler

All Known Implementing Classes:

TransactionSchedulerImpl

public interface PriorityScheduler

This is an experimental interface to provide a way to test different thoughts on priority through a few basic scheduling methods that accept priority levels.

Method Summary

TaskReservation	reserveTask(KernelRunnable task, Identity owner, Priority priority) Reserves the ability to run the given task.
void	scheduleTask(KernelRunnable task, Identity owner, Priority priority) Schedules a task to run as soon as possible based on the specific scheduler implementation.

Method Detail

reserveTask

TaskReservation reserveTask(KernelRunnable task,
                            Identity owner,
                            Priority priority)

Reserves the ability to run the given task. The scheduler will make a best effort to honor the requested priority.

Parameters:

task - the KernelRunnable to execute

owner - the entity on who's behalf this task is run

priority - the requested Priority

Returns:

a TaskReservation for the task

Throws:

TaskRejectedException - if a reservation cannot be made

scheduleTask

void scheduleTask(KernelRunnable task,
                  Identity owner,
                  Priority priority)

Schedules a task to run as soon as possible based on the specific scheduler implementation. The scheduler will make a best effort to honor the requested priority.

Parameters:

task - the KernelRunnable to execute

owner - the entity on who's behalf this task is run

priority - the requested Priority

Throws:

TaskRejectedException - if the given task is not accepted