Class DiskScheduler

java.lang.Object
   |
   +----Scheduler
           |
           +----DiskScheduler

public class DiskScheduler

extends Scheduler

DiskScheduler()

add(Job, int)

Add a new job wanting service.

printQueue()

For debugging: print the queue of waiting jobs

remove()

Retrieve (and remove) the next job to be served.

reschedule(int)

This method is called when there is a clock interrupt, and just after a call to schedule().

 public DiskScheduler()

 public boolean add(Job j,
                    int timeLeft)

Add a new job wanting service. The second argument is the amount of time remaining before the job currently using the device will finish (-1 if the device is idle). Return TRUE if this scheduler would like to preempt the current job.

Overrides:

add in class Scheduler

 public Job remove()

Retrieve (and remove) the next job to be served. Return null if there is no such job.

Overrides:

remove in class Scheduler

 public boolean reschedule(int timeLeft)

This method is called when there is a clock interrupt, and just after a call to schedule(). It returns true if there is a reason to stop the current process and run another one instead. The argument is the amount of time left until the current job finishes service on the device.

Overrides:

reschedule in class Scheduler

 public void printQueue()

For debugging: print the queue of waiting jobs

Overrides:

printQueue in class Scheduler