com.github.nill14.utils.executor

Class ReschedulableTask

java.lang.Object

com.github.nill14.utils.executor.ReschedulableTask

public class ReschedulableTask
extends Object

ReschedulableTask provides some extra methods over ScheduledExecutorService

Constructor Summary

Constructors

Constructor and Description
ReschedulableTask(ScheduledExecutorService executor, Runnable command)

Method Summary

Modifier and Type	Method and Description
void	reschedule(long delay, TimeUnit unit) Re-schedule the given task so that it get invoked only once.
void	scheduleOnce(long delay, TimeUnit unit) Schedule the execution of the command only once.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReschedulableTask

public ReschedulableTask(ScheduledExecutorService executor,
                         Runnable command)

Method Detail

reschedule

public void reschedule(long delay,
                       TimeUnit unit)

Re-schedule the given task so that it get invoked only once. The previous schedules are effectively cancelled. The last schedule wins. The next execution might be scheduled already during the actual execution. This allows, for example, re-scheduling in the command itself. But it also implies that in the worst case, the command might still be executed simultaneously. If this scenario is not acceptable then explicit synchronization shall be used.

Parameters:

delay - the time from now to delay execution

unit - the time unit of the delay parameter

scheduleOnce

public void scheduleOnce(long delay,
                         TimeUnit unit)

Schedule the execution of the command only once. Effectively, only the first schedule is executed. The next execution might be scheduled already during the actual execution. This allows, for example, re-scheduling in the command itself. But it also implies that in the worst case, the command might still be executed simultaneously. If this scenario is not acceptable then explicit synchronization shall be used.

Parameters:

delay - the time from now to delay execution

unit - the time unit of the delay parameter