Package org.aksw.commons.util.concurrent

Class ScheduleOnce

java.lang.Object

org.aksw.commons.util.concurrent.ScheduleOnce

public class ScheduleOnce
extends Object

Class to schedule a task after a certain delay and ensure that it only executes once. If there is a request to schedule the task while it is already running it will be scheduled for the delay.

Author:

raven

Field Summary

Fields

Modifier and Type	Field	Description
protected java.time.Duration	execDelay
protected java.time.Instant	lastExecTime
protected java.time.Instant	lastRequestTime
protected Object	lock
protected ScheduledExecutorService	scheduledExecutorService
protected Callable<?>	task

Constructor Summary

Constructors

Constructor	Description
ScheduleOnce(ScheduledExecutorService scheduledExecutorService, java.time.Duration execDelay, Callable<?> task)

Method Summary

Modifier and Type	Method	Description
static ScheduleOnce	scheduleOneTaskAtATime(java.time.Duration execDelay, Callable<?> task)
void	scheduleTask()

Methods inherited from class java.lang.Object

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

Field Detail

scheduledExecutorService

protected ScheduledExecutorService scheduledExecutorService

execDelay

protected java.time.Duration execDelay

task

protected Callable<?> task

lastRequestTime

protected volatile java.time.Instant lastRequestTime

lastExecTime

protected volatile java.time.Instant lastExecTime

lock

protected final Object lock

Constructor Detail

ScheduleOnce

public ScheduleOnce(ScheduledExecutorService scheduledExecutorService,
                    java.time.Duration execDelay,
                    Callable<?> task)

Method Detail

scheduleOneTaskAtATime

public static ScheduleOnce scheduleOneTaskAtATime(java.time.Duration execDelay,
                                                  Callable<?> task)

scheduleTask

public void scheduleTask()