org.mbari.siam.core
Class CpuLeaseSleepRollcallListener

java.lang.Object
  org.mbari.siam.core.CpuLeaseSleepRollcallListener

All Implemented Interfaces:

SleepRollCallListener

public class CpuLeaseSleepRollcallListener
extends java.lang.Object
implements SleepRollCallListener

CpuLeaseSleepRollcallListener is responsible for keeping the CPU awake as requested by external processes.

Author:

Bob Herlien

Field Summary

Fields inherited from interface org.mbari.siam.distributed.SleepRollCallListener

NO_TIME_SPECIFIED

Method Summary

void	cpuLease(int requestorID, long when, long howLong) Request that the CPU come on at a certain time in the future and/or remain on for a certain duration.
java.util.Vector	getLessees()
long	okToSleep() Return <= 0 if need to stay awake.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

cpuLease

public void cpuLease(int requestorID,
                     long when,
                     long howLong)
              throws java.rmi.RemoteException

Request that the CPU come on at a certain time in the future and/or remain on for a certain duration.

Parameters:

requestorID - Unique ID (externally assigned) to identify who is requesting the CPU to remain on. Allows for multiple requestors each requesting that the CPU be on.

when - Milliseconds until the requestor needs the CPU on. Use 0 (zero) to request that the CPU remain on starting now.

howLong - Number of milliseconds that the CPU should remain on. Use 0 (zero) to cancel an earlier request.

Throws:

java.rmi.RemoteException

okToSleep

public long okToSleep()

Return <= 0 if need to stay awake. Else, return number of milliseconds until we need to wake up.

Specified by:

okToSleep in interface SleepRollCallListener

getLessees

public java.util.Vector getLessees()