Package org.springframework.scheduling.support

Class NoOpTaskScheduler

java.lang.Object

org.springframework.scheduling.support.NoOpTaskScheduler

All Implemented Interfaces:

TaskScheduler

public class NoOpTaskScheduler
extends Object
implements TaskScheduler

A basic, no operation TaskScheduler implementation suitable for disabling scheduling, typically used for test setups.

Will accept any scheduling request but never actually execute it.

Since:

6.1.3

Author:

Juergen Hoeller

Constructor Summary

Constructors

Constructor	Description
NoOpTaskScheduler()

Method Summary

Modifier and Type	Method	Description
ScheduledFuture<?>	schedule(Runnable task, Instant 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, Duration period)	Schedule the given Runnable, starting as soon as possible and invoking it with the given period.
ScheduledFuture<?>	scheduleAtFixedRate(Runnable task, Instant startTime, Duration period)	Schedule the given Runnable, invoking it at the specified execution time and subsequently with the given period.
ScheduledFuture<?>	scheduleWithFixedDelay(Runnable task, Duration 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, Instant startTime, Duration 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.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.scheduling.TaskScheduler

getClock, schedule, scheduleAtFixedRate, scheduleAtFixedRate, scheduleWithFixedDelay, scheduleWithFixedDelay

Constructor Details

NoOpTaskScheduler

public NoOpTaskScheduler()

Method Details

schedule

@Nullable
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.nextExecution(org.springframework.scheduling.TriggerContext))

See Also:

• CronTrigger

schedule

public ScheduledFuture<?> schedule(Runnable task,
 Instant 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,
 Instant startTime,
 Duration 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

Returns:

a ScheduledFuture representing pending completion of the task

scheduleAtFixedRate

public ScheduledFuture<?> scheduleAtFixedRate(Runnable task,
 Duration 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

Returns:

a ScheduledFuture representing pending completion of the task

scheduleWithFixedDelay

public ScheduledFuture<?> scheduleWithFixedDelay(Runnable task,
 Instant startTime,
 Duration 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

Returns:

a ScheduledFuture representing pending completion of the task

scheduleWithFixedDelay

public ScheduledFuture<?> scheduleWithFixedDelay(Runnable task,
 Duration 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 delay between the completion of one execution and the start of the next

Returns:

a ScheduledFuture representing pending completion of the task