java.lang.Object
- org.springframework.scheduling.concurrent.ScheduledExecutorTask

```
public class ScheduledExecutorTask
extends Object
```
JavaBean that describes a scheduled executor task, consisting of the Runnable and a delay plus period. The period needs to be specified; there is no point in a default for it.
The ScheduledExecutorService does not offer more sophisticated scheduling options such as cron expressions. Consider using ThreadPoolTaskScheduler for such needs.
Note that the ScheduledExecutorService mechanism uses a Runnable instance that is shared between repeated executions, in contrast to Quartz which creates a new Job instance for each execution.
Since:
2.0
Author:
Juergen Hoeller
See Also:
ScheduledExecutorService.scheduleWithFixedDelay(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit), ScheduledExecutorService.scheduleAtFixedRate(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit)

Constructor Summary

Constructors
Constructor	Description
`ScheduledExecutorTask()`	Create a new ScheduledExecutorTask, to be populated via bean properties.
`ScheduledExecutorTask(Runnable executorTask)`	Create a new ScheduledExecutorTask, with default one-time execution without delay.
`ScheduledExecutorTask(Runnable executorTask, long delay)`	Create a new ScheduledExecutorTask, with default one-time execution with the given delay.
`ScheduledExecutorTask(Runnable executorTask, long delay, long period, boolean fixedRate)`	Create a new ScheduledExecutorTask.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`getDelay()`	Return the delay before starting the job for the first time.
`long`	`getPeriod()`	Return the period between repeated task executions.
`Runnable`	`getRunnable()`	Return the Runnable to schedule as executor task.
`TimeUnit`	`getTimeUnit()`	Return the time unit for the delay and period values.
`boolean`	`isFixedRate()`	Return whether to schedule as fixed-rate execution.
`boolean`	`isOneTimeTask()`	Is this task only ever going to execute once?
`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`	`setRunnable(Runnable executorTask)`	Set the Runnable to schedule as executor task.
`void`	`setTimeUnit(TimeUnit timeUnit)`	Specify the time unit for the delay and period values.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ScheduledExecutorTask
```
public ScheduledExecutorTask()
```
    Create a new ScheduledExecutorTask, to be populated via bean properties.
    See Also:
    setDelay(long), setPeriod(long), setFixedRate(boolean)
  - ScheduledExecutorTask
```
public ScheduledExecutorTask(Runnable executorTask)
```
    Create a new ScheduledExecutorTask, with default one-time execution without delay.
    Parameters:
    executorTask - the Runnable to schedule
  - ScheduledExecutorTask
```
public ScheduledExecutorTask(Runnable executorTask,
                             long delay)
```
    Create a new ScheduledExecutorTask, with default one-time execution with the given delay.
    Parameters:
    executorTask - the Runnable to schedule
    delay - the delay before starting the task for the first time (ms)
  - ScheduledExecutorTask
```
public ScheduledExecutorTask(Runnable executorTask,
                             long delay,
                             long period,
                             boolean fixedRate)
```
    Create a new ScheduledExecutorTask.
    Parameters:
    executorTask - the Runnable 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
  - setRunnable
```
public void setRunnable(Runnable executorTask)
```
    Set the Runnable to schedule as executor task.
  - getRunnable
```
public Runnable getRunnable()
```
    Return the Runnable to schedule as executor task.
  - 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 -1, leading to one-time execution. In case of a positive value, the task will be executed repeatedly, with the given interval in-between 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.concurrent.ScheduledExecutorService 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:
    setFixedRate(boolean), isOneTimeTask(), ScheduledExecutorService.scheduleWithFixedDelay(Runnable, long, long, java.util.concurrent.TimeUnit)
  - getPeriod
```
public long getPeriod()
```
    Return the period between repeated task executions.
  - isOneTimeTask
```
public boolean isOneTimeTask()
```
    Is this task only ever going to execute once?
    Returns:
    true if this task is only ever going to execute once
    See Also:
    getPeriod()
  - setTimeUnit
```
public void setTimeUnit(@Nullable
                        TimeUnit timeUnit)
```
    Specify the time unit for the delay and period values. Default is milliseconds (TimeUnit.MILLISECONDS).
    See Also:
    TimeUnit.MILLISECONDS, TimeUnit.SECONDS
  - getTimeUnit
```
public TimeUnit getTimeUnit()
```
    Return the time unit for the delay and period values.
  - setFixedRate
```
public void setFixedRate(boolean fixedRate)
```
    Set whether to schedule as fixed-rate execution, rather than fixed-delay execution. Default is "false", that is, fixed delay.
    See ScheduledExecutorService javadoc for details on those execution modes.
    See Also:
    ScheduledExecutorService.scheduleWithFixedDelay(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit), ScheduledExecutorService.scheduleAtFixedRate(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit)
  - isFixedRate
```
public boolean isFixedRate()
```
    Return whether to schedule as fixed-rate execution.

Class ScheduledExecutorTask

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ScheduledExecutorTask

ScheduledExecutorTask

ScheduledExecutorTask

ScheduledExecutorTask

Method Detail

setRunnable

getRunnable

setDelay

getDelay

setPeriod

getPeriod

isOneTimeTask

setTimeUnit

getTimeUnit

setFixedRate

isFixedRate