org.springframework.scheduling.timer
Class ScheduledTimerTask

java.lang.Object
  org.springframework.scheduling.timer.ScheduledTimerTask

public class ScheduledTimerTask

extends Object

JavaBean that describes a scheduled TimerTask, consisting of the TimerTask itself and a delay plus period. Period needs to be specified; there is no point in a default for it.

The J2SE Timer does not offer more sophisticated scheduling options like cron expressions. Consider using Quartz for such demanding needs.

Note that Timer uses a TimerTask instance that is shared between repeated executions, in contrast to Quartz which instantiates a new Job for each execution.

Since:

19.02.2004

Author:

Juergen Hoeller

See Also:

TimerTask, Timer.schedule(TimerTask, long, long), Timer.scheduleAtFixedRate(TimerTask, long, long)

Constructor Summary

ScheduledTimerTask()
Create a new ScheduledTimerTask, to be populated via bean properties.

ScheduledTimerTask(TimerTask timerTask)
Create a new ScheduledTimerTask, with default one-time execution without delay.

ScheduledTimerTask(TimerTask timerTask, long delay)
Create a new ScheduledTimerTask, with default one-time execution with the given delay.

ScheduledTimerTask(TimerTask timerTask, long delay, long period, boolean fixedRate)
Create a new ScheduledTimerTask.

Method Summary

long	getDelay() Return the delay before starting the job for the first time.
long	getPeriod() Return the period between repeated task executions.
TimerTask	getTimerTask() Return the TimerTask to schedule.
boolean	isFixedRate() Return whether to schedule as fixed-rate execution.
void	setDelay(long delay) Set the delay before starting the task for the first time, in milliseconds.
void	setFixedRate(boolean fixedRate) Set whether to schedule as fixed-rate execution, rather than fixed-delay execution.
void	setPeriod(long period) Set the period between repeated task executions, in milliseconds.
void	setTimerTask(TimerTask timerTask) Set the TimerTask to schedule.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScheduledTimerTask

public ScheduledTimerTask()

Create a new ScheduledTimerTask, to be populated via bean properties.

See Also:

setTimerTask(java.util.TimerTask), setDelay(long), setPeriod(long), setFixedRate(boolean)

ScheduledTimerTask

public ScheduledTimerTask(TimerTask timerTask)

Create a new ScheduledTimerTask, with default one-time execution without delay.

Parameters:

timerTask - the TimerTask to schedule

ScheduledTimerTask

public ScheduledTimerTask(TimerTask timerTask,
                          long delay)

Create a new ScheduledTimerTask, with default one-time execution with the given delay.

Parameters:

timerTask - the TimerTask to schedule

delay - the delay before starting the task for the first time (ms)

ScheduledTimerTask

public ScheduledTimerTask(TimerTask timerTask,
                          long delay,
                          long period,
                          boolean fixedRate)

Create a new ScheduledTimerTask.

Parameters:

timerTask - the TimerTask to schedule

delay - the delay before starting the task for the first time (ms)

period - the period between repeated task executions (ms)

fixedRate - whether to schedule as fixed-rate execution

Method Detail

setTimerTask

public void setTimerTask(TimerTask timerTask)

Set the TimerTask to schedule.

getTimerTask

public TimerTask getTimerTask()

Return the TimerTask to schedule.

setDelay

public void setDelay(long delay)

Set the delay before starting the task for the first time, in milliseconds. Default is 0, immediately starting the task after successful scheduling.

getDelay

public long getDelay()

Return the delay before starting the job for the first time.

setPeriod

public void setPeriod(long period)

Set the period between repeated task executions, in milliseconds. Default is 0, leading to one-time execution. In case of a positive value, the task will be executed repeatedly, with the given interval inbetween executions.

Note that the semantics of the period vary between fixed-rate and fixed-delay execution.

See Also:

setFixedRate(boolean)

getPeriod

public long getPeriod()

Return the period between repeated task executions.

setFixedRate

public void setFixedRate(boolean fixedRate)

Set whether to schedule as fixed-rate execution, rather than fixed-delay execution. Default is false, i.e. fixed delay.

See Timer javadoc for details on those execution modes.

See Also:

Timer.schedule(TimerTask, long, long), Timer.scheduleAtFixedRate(TimerTask, long, long)

isFixedRate

public boolean isFixedRate()

Return whether to schedule as fixed-rate execution.