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java.lang.Object gov.lbl.dsd.firefish.util.TimerTask
A task that can be scheduled for one-time or repeated execution by a Timer.
This is a copy and paste of TimerTask
,
necessitated by the java.util
's restrictive visibility policy, effectively preventing subclassing.
This class is identical with the one from JDK sun-1.4.1rc1 (TimerTask.java 1.7 01/12/03).
Timer
Method Summary | |
boolean |
cancel()
Cancels this timer task. |
abstract void |
run()
The action to be performed by this timer task. |
long |
scheduledExecutionTime()
Returns the scheduled execution time of the most recent actual execution of this task. |
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
public abstract void run()
run
in interface Runnable
public boolean cancel()
Note that calling this method from within the run method of a repeating timer task absolutely guarantees that the timer task will not run again.
This method may be called repeatedly; the second and subsequent calls have no effect.
public long scheduledExecutionTime()
This method is typically invoked from within a task's run method, to determine whether the current execution of the task is sufficiently timely to warrant performing the scheduled activity:
public void run() { if (System.currentTimeMillis() - scheduledExecutionTime() >= MAX_TARDINESS) return; // Too late; skip this execution. // Perform the task }This method is typically not used in conjunction with fixed-delay execution repeating tasks, as their scheduled execution times are allowed to drift over time, and so are not terribly significant.
Date#getTime()
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