Java Doc for ScheduledTimerTask.java in  » J2EE » spring-framework-2.5 » org » springframework » scheduling » timer » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.scheduling.timer 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


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

ScheduledTimerTask
public class ScheduledTimerTask (Code)
JavaBean that describes a scheduled TimerTask , consisting of the TimerTask itself or a Runnable to create a TimerTask for and a delay plus period. The period needs to be specified; there is no point in a default for it.

The JDK's java.util.Timer facility does not offer sophisticated scheduling options such as cron expressions. Consider using Quartz for such advanced needs.

Note that the java.util.Timer mechanism uses a TimerTask instance that is shared between repeated executions, in contrast to Quartz which creates a new Job instance for each execution.
author:
   Juergen Hoeller
since:
   19.02.2004
See Also:   java.util.TimerTask
See Also:   java.util.Timer.schedule(TimerTasklonglong)
See Also:   java.util.Timer.scheduleAtFixedRate(TimerTasklonglong)




Constructor Summary
public  ScheduledTimerTask()
     Create a new ScheduledTimerTask, to be populated via bean properties.
public  ScheduledTimerTask(TimerTask timerTask)
     Create a new ScheduledTimerTask, with default one-time execution without delay.
public  ScheduledTimerTask(TimerTask timerTask, long delay)
     Create a new ScheduledTimerTask, with default one-time execution with the given delay.
public  ScheduledTimerTask(TimerTask timerTask, long delay, long period, boolean fixedRate)
     Create a new ScheduledTimerTask.
public  ScheduledTimerTask(Runnable timerTask)
     Create a new ScheduledTimerTask, with default one-time execution without delay.
public  ScheduledTimerTask(Runnable timerTask, long delay)
     Create a new ScheduledTimerTask, with default one-time execution with the given delay.
public  ScheduledTimerTask(Runnable timerTask, long delay, long period, boolean fixedRate)
     Create a new ScheduledTimerTask.

Method Summary
public  longgetDelay()
     Return the delay before starting the job for the first time.
public  longgetPeriod()
     Return the period between repeated task executions.
public  TimerTaskgetTimerTask()
     Return the TimerTask to schedule.
public  booleanisFixedRate()
     Return whether to schedule as fixed-rate execution.
public  booleanisOneTimeTask()
    
public  voidsetDelay(long delay)
     Set the delay before starting the task for the first time, in milliseconds.
public  voidsetFixedRate(boolean fixedRate)
     Set whether to schedule as fixed-rate execution, rather than fixed-delay execution.
public  voidsetPeriod(long period)
     Set the period between repeated task executions, in milliseconds.

Default is -1, leading to one-time execution.

public  voidsetRunnable(Runnable timerTask)
     Set the Runnable to schedule as TimerTask.
public  voidsetTimerTask(TimerTask timerTask)
     Set the TimerTask to schedule.


Constructor Detail
ScheduledTimerTask
public ScheduledTimerTask()(Code)
Create a new ScheduledTimerTask, to be populated via bean properties.
See Also:   ScheduledTimerTask.setTimerTask
See Also:   ScheduledTimerTask.setDelay
See Also:   ScheduledTimerTask.setPeriod
See Also:   ScheduledTimerTask.setFixedRate



ScheduledTimerTask
public ScheduledTimerTask(TimerTask timerTask)(Code)
Create a new ScheduledTimerTask, with default one-time execution without delay.
Parameters:
  timerTask - the TimerTask to schedule



ScheduledTimerTask
public ScheduledTimerTask(TimerTask timerTask, long delay)(Code)
Create a new ScheduledTimerTask, with default one-time execution with the given delay.
Parameters:
  timerTask - the TimerTask to schedule
Parameters:
  delay - the delay before starting the task for the first time (ms)



ScheduledTimerTask
public ScheduledTimerTask(TimerTask timerTask, long delay, long period, boolean fixedRate)(Code)
Create a new ScheduledTimerTask.
Parameters:
  timerTask - the TimerTask to schedule
Parameters:
  delay - the delay before starting the task for the first time (ms)
Parameters:
  period - the period between repeated task executions (ms)
Parameters:
  fixedRate - whether to schedule as fixed-rate execution



ScheduledTimerTask
public ScheduledTimerTask(Runnable timerTask)(Code)
Create a new ScheduledTimerTask, with default one-time execution without delay.
Parameters:
  timerTask - the Runnable to schedule as TimerTask



ScheduledTimerTask
public ScheduledTimerTask(Runnable timerTask, long delay)(Code)
Create a new ScheduledTimerTask, with default one-time execution with the given delay.
Parameters:
  timerTask - the Runnable to schedule as TimerTask
Parameters:
  delay - the delay before starting the task for the first time (ms)



ScheduledTimerTask
public ScheduledTimerTask(Runnable timerTask, long delay, long period, boolean fixedRate)(Code)
Create a new ScheduledTimerTask.
Parameters:
  timerTask - the Runnable to schedule as TimerTask
Parameters:
  delay - the delay before starting the task for the first time (ms)
Parameters:
  period - the period between repeated task executions (ms)
Parameters:
  fixedRate - whether to schedule as fixed-rate execution




Method Detail
getDelay
public long getDelay()(Code)
Return the delay before starting the job for the first time.



getPeriod
public long getPeriod()(Code)
Return the period between repeated task executions.



getTimerTask
public TimerTask getTimerTask()(Code)
Return the TimerTask to schedule.



isFixedRate
public boolean isFixedRate()(Code)
Return whether to schedule as fixed-rate execution.



isOneTimeTask
public boolean isOneTimeTask()(Code)
Is this task only ever going to execute once? true if this task is only ever going to execute once
See Also:   ScheduledTimerTask.getPeriod()



setDelay
public void setDelay(long delay)(Code)
Set the delay before starting the task for the first time, in milliseconds. Default is 0, immediately starting the task after successful scheduling.



setFixedRate
public void setFixedRate(boolean fixedRate)(Code)
Set whether to schedule as fixed-rate execution, rather than fixed-delay execution. Default is "false", that is, fixed delay.

See Timer javadoc for details on those execution modes.
See Also:   java.util.Timer.schedule(TimerTasklonglong)
See Also:   java.util.Timer.scheduleAtFixedRate(TimerTasklonglong)




setPeriod
public void setPeriod(long period)(Code)
Set the period between repeated task executions, in milliseconds.

Default is -1, 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 value vary between fixed-rate and fixed-delay execution.

Note: A period of 0 (for example as fixed delay) is not supported, simply because java.util.Timer itself does not support it. Hence a value of 0 will be treated as one-time execution; however, that value should never be specified explicitly in the first place!
See Also:   ScheduledTimerTask.setFixedRate
See Also:   ScheduledTimerTask.isOneTimeTask()
See Also:   java.util.Timer.schedule(TimerTasklonglong)




setRunnable
public void setRunnable(Runnable timerTask)(Code)
Set the Runnable to schedule as TimerTask.
See Also:   DelegatingTimerTask



setTimerTask
public void setTimerTask(TimerTask timerTask)(Code)
Set the TimerTask to schedule.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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