java.lang.Object
- org.springframework.scheduling.concurrent.ConcurrentTaskExecutor
- - org.springframework.scheduling.concurrent.ConcurrentTaskScheduler

All Implemented Interfaces:
Executor, AsyncListenableTaskExecutor, AsyncTaskExecutor, TaskExecutor, SchedulingTaskExecutor, TaskScheduler
Direct Known Subclasses:
DefaultManagedTaskScheduler
```
public class ConcurrentTaskScheduler
extends ConcurrentTaskExecutor
implements TaskScheduler
```
Adapter that takes a java.util.concurrent.ScheduledExecutorService and exposes a Spring TaskScheduler for it. Extends ConcurrentTaskExecutor in order to implement the SchedulingTaskExecutor interface as well.
Autodetects a JSR-236 ManagedScheduledExecutorService in order to use it for trigger-based scheduling if possible, instead of Spring's local trigger management which ends up delegating to regular delay-based scheduling against the java.util.concurrent.ScheduledExecutorService API. For JSR-236 style lookup in a Java EE 7 environment, consider using DefaultManagedTaskScheduler.
Note that there is a pre-built ThreadPoolTaskScheduler that allows for defining a ScheduledThreadPoolExecutor in bean style, exposing it as a Spring TaskScheduler directly. This is a convenient alternative to a raw ScheduledThreadPoolExecutor definition with a separate definition of the present adapter class.
Since:
3.0
Author:
Juergen Hoeller, Mark Fisher
See Also:
ScheduledExecutorService, ScheduledThreadPoolExecutor, Executors, DefaultManagedTaskScheduler, ThreadPoolTaskScheduler

Nested Class Summary
- Nested classes/interfaces inherited from class org.springframework.scheduling.concurrent.ConcurrentTaskExecutor
  ConcurrentTaskExecutor.ManagedTaskBuilder

Field Summary
- Fields inherited from interface org.springframework.core.task.AsyncTaskExecutor
  TIMEOUT_IMMEDIATE, TIMEOUT_INDEFINITE

Constructor Summary

Constructors
Constructor	Description
`ConcurrentTaskScheduler()`	Create a new ConcurrentTaskScheduler, using a single thread executor as default.
`ConcurrentTaskScheduler(Executor concurrentExecutor, ScheduledExecutorService scheduledExecutor)`	Create a new ConcurrentTaskScheduler, using the given `Executor` and `ScheduledExecutorService` as delegates.
`ConcurrentTaskScheduler(ScheduledExecutorService scheduledExecutor)`	Create a new ConcurrentTaskScheduler, using the given `ScheduledExecutorService` as shared delegate.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ScheduledFuture<?>`	`schedule(Runnable task, Date startTime)`	Schedule the given `Runnable`, invoking it at the specified execution time.
`ScheduledFuture<?>`	`schedule(Runnable task, Trigger trigger)`	Schedule the given `Runnable`, invoking it whenever the trigger indicates a next execution time.
`ScheduledFuture<?>`	`scheduleAtFixedRate(Runnable task, long period)`	Schedule the given `Runnable`, starting as soon as possible and invoking it with the given period.
`ScheduledFuture<?>`	`scheduleAtFixedRate(Runnable task, Date startTime, long period)`	Schedule the given `Runnable`, invoking it at the specified execution time and subsequently with the given period.
`ScheduledFuture<?>`	`scheduleWithFixedDelay(Runnable task, long delay)`	Schedule the given `Runnable`, starting as soon as possible and invoking it with the given delay between the completion of one execution and the start of the next.
`ScheduledFuture<?>`	`scheduleWithFixedDelay(Runnable task, Date startTime, long delay)`	Schedule the given `Runnable`, invoking it at the specified execution time and subsequently with the given delay between the completion of one execution and the start of the next.
`void`	`setErrorHandler(ErrorHandler errorHandler)`	Provide an `ErrorHandler` strategy.
`void`	`setScheduledExecutor(ScheduledExecutorService scheduledExecutor)`	Specify the `ScheduledExecutorService` to delegate to.

Methods inherited from class org.springframework.scheduling.concurrent.ConcurrentTaskExecutor
execute, execute, getConcurrentExecutor, prefersShortLivedTasks, setConcurrentExecutor, setTaskDecorator, submit, submit, submitListenable, submitListenable

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

- Constructor Detail
  - ConcurrentTaskScheduler
```
public ConcurrentTaskScheduler()
```
    Create a new ConcurrentTaskScheduler, using a single thread executor as default.
    See Also:
    Executors.newSingleThreadScheduledExecutor()
  - ConcurrentTaskScheduler
```
public ConcurrentTaskScheduler(ScheduledExecutorService scheduledExecutor)
```
    Create a new ConcurrentTaskScheduler, using the given ScheduledExecutorService as shared delegate.
    Autodetects a JSR-236 ManagedScheduledExecutorService in order to use it for trigger-based scheduling if possible, instead of Spring's local trigger management.
    Parameters:
    scheduledExecutor - the ScheduledExecutorService to delegate to for SchedulingTaskExecutor as well as TaskScheduler invocations
  - ConcurrentTaskScheduler
```
public ConcurrentTaskScheduler(Executor concurrentExecutor,
                               ScheduledExecutorService scheduledExecutor)
```
    Create a new ConcurrentTaskScheduler, using the given Executor and ScheduledExecutorService as delegates.
    Autodetects a JSR-236 ManagedScheduledExecutorService in order to use it for trigger-based scheduling if possible, instead of Spring's local trigger management.
    Parameters:
    concurrentExecutor - the Executor to delegate to for SchedulingTaskExecutor invocations
    scheduledExecutor - the ScheduledExecutorService to delegate to for TaskScheduler invocations
- Method Detail
  - setScheduledExecutor
```
public final void setScheduledExecutor(ScheduledExecutorService scheduledExecutor)
```
    Specify the ScheduledExecutorService to delegate to.
    Autodetects a JSR-236 ManagedScheduledExecutorService in order to use it for trigger-based scheduling if possible, instead of Spring's local trigger management.
    Note: This will only apply to TaskScheduler invocations. If you want the given executor to apply to SchedulingTaskExecutor invocations as well, pass the same executor reference to ConcurrentTaskExecutor.setConcurrentExecutor(java.util.concurrent.Executor).
    See Also:
    ConcurrentTaskExecutor.setConcurrentExecutor(java.util.concurrent.Executor)
  - setErrorHandler
```
public void setErrorHandler(ErrorHandler errorHandler)
```
    Provide an ErrorHandler strategy.
  - schedule
```
public ScheduledFuture<?> schedule(Runnable task,
                                   Trigger trigger)
```
    Description copied from interface: TaskScheduler
    Schedule the given Runnable, invoking it whenever the trigger indicates a next execution time.
    Execution will end once the scheduler shuts down or the returned ScheduledFuture gets cancelled.
    Specified by:
    schedule in interface TaskScheduler
    Parameters:
    task - the Runnable to execute whenever the trigger fires
    trigger - an implementation of the Trigger interface, e.g. a CronTrigger object wrapping a cron expression
    Returns:
    a ScheduledFuture representing pending completion of the task, or null if the given Trigger object never fires (i.e. returns null from Trigger.nextExecutionTime(org.springframework.scheduling.TriggerContext))
    See Also:
    CronTrigger
  - schedule
```
public ScheduledFuture<?> schedule(Runnable task,
                                   Date startTime)
```
    Description copied from interface: TaskScheduler
    Schedule the given Runnable, invoking it at the specified execution time.
    Execution will end once the scheduler shuts down or the returned ScheduledFuture gets cancelled.
    Specified by:
    schedule in interface TaskScheduler
    Parameters:
    task - the Runnable to execute whenever the trigger fires
    startTime - the desired execution time for the task (if this is in the past, the task will be executed immediately, i.e. as soon as possible)
    Returns:
    a ScheduledFuture representing pending completion of the task
  - scheduleAtFixedRate
```
public ScheduledFuture<?> scheduleAtFixedRate(Runnable task,
                                              Date startTime,
                                              long period)
```
    Description copied from interface: TaskScheduler
    Schedule the given Runnable, invoking it at the specified execution time and subsequently with the given period.
    Execution will end once the scheduler shuts down or the returned ScheduledFuture gets cancelled.
    Specified by:
    scheduleAtFixedRate in interface TaskScheduler
    Parameters:
    task - the Runnable to execute whenever the trigger fires
    startTime - the desired first execution time for the task (if this is in the past, the task will be executed immediately, i.e. as soon as possible)
    period - the interval between successive executions of the task (in milliseconds)
    Returns:
    a ScheduledFuture representing pending completion of the task
  - scheduleAtFixedRate
```
public ScheduledFuture<?> scheduleAtFixedRate(Runnable task,
                                              long period)
```
    Description copied from interface: TaskScheduler
    Schedule the given Runnable, starting as soon as possible and invoking it with the given period.
    Execution will end once the scheduler shuts down or the returned ScheduledFuture gets cancelled.
    Specified by:
    scheduleAtFixedRate in interface TaskScheduler
    Parameters:
    task - the Runnable to execute whenever the trigger fires
    period - the interval between successive executions of the task (in milliseconds)
    Returns:
    a ScheduledFuture representing pending completion of the task
  - scheduleWithFixedDelay
```
public ScheduledFuture<?> scheduleWithFixedDelay(Runnable task,
                                                 Date startTime,
                                                 long delay)
```
    Description copied from interface: TaskScheduler
    Schedule the given Runnable, invoking it at the specified execution time and subsequently with the given delay between the completion of one execution and the start of the next.
    Execution will end once the scheduler shuts down or the returned ScheduledFuture gets cancelled.
    Specified by:
    scheduleWithFixedDelay in interface TaskScheduler
    Parameters:
    task - the Runnable to execute whenever the trigger fires
    startTime - the desired first execution time for the task (if this is in the past, the task will be executed immediately, i.e. as soon as possible)
    delay - the delay between the completion of one execution and the start of the next (in milliseconds)
    Returns:
    a ScheduledFuture representing pending completion of the task
  - scheduleWithFixedDelay
```
public ScheduledFuture<?> scheduleWithFixedDelay(Runnable task,
                                                 long delay)
```
    Description copied from interface: TaskScheduler
    Schedule the given Runnable, starting as soon as possible and invoking it with the given delay between the completion of one execution and the start of the next.
    Execution will end once the scheduler shuts down or the returned ScheduledFuture gets cancelled.
    Specified by:
    scheduleWithFixedDelay in interface TaskScheduler
    Parameters:
    task - the Runnable to execute whenever the trigger fires
    delay - the interval between successive executions of the task (in milliseconds)
    Returns:
    a ScheduledFuture representing pending completion of the task

Class ConcurrentTaskScheduler

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.scheduling.concurrent.ConcurrentTaskExecutor

Field Summary

Fields inherited from interface org.springframework.core.task.AsyncTaskExecutor

Constructor Summary

Method Summary

Methods inherited from class org.springframework.scheduling.concurrent.ConcurrentTaskExecutor

Methods inherited from class java.lang.Object

Constructor Detail

ConcurrentTaskScheduler

ConcurrentTaskScheduler

ConcurrentTaskScheduler

Method Detail

setScheduledExecutor

setErrorHandler

schedule

schedule

scheduleAtFixedRate

scheduleAtFixedRate

scheduleWithFixedDelay

scheduleWithFixedDelay