t

akka.actor.typed

Scheduler

trait Scheduler extends AnyRef

The ActorSystem facility for scheduling tasks.

For scheduling within actors Behaviors.withTimers should be preferred.

Not for user extension

Annotations
@DoNotInherit()
Source
Scheduler.scala
Linear Supertypes
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Scheduler
  2. AnyRef
  3. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def scheduleAtFixedRate(initialDelay: Duration, interval: Duration, runnable: Runnable, executor: ExecutionContext): Cancellable

    Java API: Schedules a Runnable to be run repeatedly with an initial delay and a frequency.

    Java API: Schedules a Runnable to be run repeatedly with an initial delay and a frequency. E.g. if you would like the function to be run after 2 seconds and thereafter every 100ms you would set delay to Duration.ofSeconds(2), and interval to Duration.ofMillis(100).

    It will compensate the delay for a subsequent task if the previous tasks took too long to execute. In such cases, the actual execution interval will differ from the interval passed to the method.

    If the execution of the tasks takes longer than the interval, the subsequent execution will start immediately after the prior one completes (there will be no overlap of executions). This also has the consequence that after long garbage collection pauses or other reasons when the JVM was suspended all "missed" tasks will execute when the process wakes up again.

    In the long run, the frequency of execution will be exactly the reciprocal of the specified interval.

    Warning: scheduleAtFixedRate can result in bursts of scheduled tasks after long garbage collection pauses, which may in worst case cause undesired load on the system. Therefore scheduleWithFixedDelay is often preferred.

    If the Runnable throws an exception the repeated scheduling is aborted, i.e. the function will not be invoked any more.

    Exceptions thrown

    IllegalArgumentException if the given delays exceed the maximum reach (calculated as: delay / tickNanos > Int.MaxValue). Note: For scheduling in actors Behaviors.withTimers should be preferred.

  2. abstract def scheduleAtFixedRate(initialDelay: FiniteDuration, interval: FiniteDuration)(runnable: Runnable)(implicit executor: ExecutionContext): Cancellable

    Scala API: Schedules a Runnable to be run repeatedly with an initial delay and a frequency.

    Scala API: Schedules a Runnable to be run repeatedly with an initial delay and a frequency. E.g. if you would like the function to be run after 2 seconds and thereafter every 100ms you would set delay=Duration(2, TimeUnit.SECONDS) and interval=Duration(100, TimeUnit.MILLISECONDS).

    It will compensate the delay for a subsequent task if the previous tasks took too long to execute. In such cases, the actual execution interval will differ from the interval passed to the method.

    If the execution of the tasks takes longer than the interval, the subsequent execution will start immediately after the prior one completes (there will be no overlap of executions). This also has the consequence that after long garbage collection pauses or other reasons when the JVM was suspended all "missed" tasks will execute when the process wakes up again.

    In the long run, the frequency of execution will be exactly the reciprocal of the specified interval.

    Warning: scheduleAtFixedRate can result in bursts of scheduled tasks after long garbage collection pauses, which may in worst case cause undesired load on the system. Therefore scheduleWithFixedDelay is often preferred.

    If the Runnable throws an exception the repeated scheduling is aborted, i.e. the function will not be invoked any more.

    Exceptions thrown

    IllegalArgumentException if the given delays exceed the maximum reach (calculated as: delay / tickNanos > Int.MaxValue). Note: For scheduling within actors Behaviors.withTimers should be preferred.

  3. abstract def scheduleOnce(delay: Duration, runnable: Runnable, executor: ExecutionContext): Cancellable

    Java API: Schedules a Runnable to be run once with a delay, i.e.

    Java API: Schedules a Runnable to be run once with a delay, i.e. a time period that has to pass before the runnable is executed.

    Exceptions thrown

    IllegalArgumentException if the given delays exceed the maximum reach (calculated as: delay / tickNanos > Int.MaxValue). Note: For scheduling within actors Behaviors.withTimers or ActorContext.scheduleOnce should be preferred.

  4. abstract def scheduleOnce(delay: FiniteDuration, runnable: Runnable)(implicit executor: ExecutionContext): Cancellable

    Scala API: Schedules a Runnable to be run once with a delay, i.e.

    Scala API: Schedules a Runnable to be run once with a delay, i.e. a time period that has to pass before the runnable is executed.

    Exceptions thrown

    IllegalArgumentException if the given delays exceed the maximum reach (calculated as: delay / tickNanos > Int.MaxValue). Note: For scheduling within actors Behaviors.withTimers or ActorContext.scheduleOnce should be preferred.

  5. abstract def scheduleWithFixedDelay(initialDelay: Duration, delay: Duration, runnable: Runnable, executor: ExecutionContext): Cancellable

    Java API: Schedules a Runnable to be run repeatedly with an initial delay and a fixed delay between subsequent executions.

    Java API: Schedules a Runnable to be run repeatedly with an initial delay and a fixed delay between subsequent executions. E.g. if you would like the function to be run after 2 seconds and thereafter every 100ms you would set delay to Duration.ofSeconds(2), and interval to Duration.ofMillis(100).

    It will not compensate the delay between tasks if the execution takes a long time or if scheduling is delayed longer than specified for some reason. The delay between subsequent execution will always be (at least) the given delay.

    In the long run, the frequency of tasks will generally be slightly lower than the reciprocal of the specified delay.

    If the Runnable throws an exception the repeated scheduling is aborted, i.e. the function will not be invoked any more.

    Exceptions thrown

    IllegalArgumentException if the given delays exceed the maximum reach (calculated as: delay / tickNanos > Int.MaxValue). Note: For scheduling in actors Behaviors.withTimers should be preferred.

  6. abstract def scheduleWithFixedDelay(initialDelay: FiniteDuration, delay: FiniteDuration)(runnable: Runnable)(implicit executor: ExecutionContext): Cancellable

    Scala API: Schedules a Runnable to be run repeatedly with an initial delay and a fixed delay between subsequent executions.

    Scala API: Schedules a Runnable to be run repeatedly with an initial delay and a fixed delay between subsequent executions. E.g. if you would like the function to be run after 2 seconds and thereafter every 100ms you would set delay=Duration(2, TimeUnit.SECONDS) and interval=Duration(100, TimeUnit.MILLISECONDS).

    It will not compensate the delay between tasks if the execution takes a long time or if scheduling is delayed longer than specified for some reason. The delay between subsequent execution will always be (at least) the given delay. In the long run, the frequency of execution will generally be slightly lower than the reciprocal of the specified delay.

    If the Runnable throws an exception the repeated scheduling is aborted, i.e. the function will not be invoked any more.

    Exceptions thrown

    IllegalArgumentException if the given delays exceed the maximum reach (calculated as: delay / tickNanos > Int.MaxValue). Note: For scheduling within actors Behaviors.withTimers should be preferred.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from Scheduler to any2stringadd[Scheduler] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Scheduler, B)
    Implicit
    This member is added by an implicit conversion from Scheduler to ArrowAssoc[Scheduler] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native() @HotSpotIntrinsicCandidate()
  8. def ensuring(cond: (Scheduler) ⇒ Boolean, msg: ⇒ Any): Scheduler
    Implicit
    This member is added by an implicit conversion from Scheduler to Ensuring[Scheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (Scheduler) ⇒ Boolean): Scheduler
    Implicit
    This member is added by an implicit conversion from Scheduler to Ensuring[Scheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): Scheduler
    Implicit
    This member is added by an implicit conversion from Scheduler to Ensuring[Scheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): Scheduler
    Implicit
    This member is added by an implicit conversion from Scheduler to Ensuring[Scheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  14. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from Scheduler to StringFormat[Scheduler] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  15. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  16. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  17. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  19. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  20. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  21. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  22. def toString(): String
    Definition Classes
    AnyRef → Any
  23. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  24. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  25. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  26. def [B](y: B): (Scheduler, B)
    Implicit
    This member is added by an implicit conversion from Scheduler to ArrowAssoc[Scheduler] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] ) @Deprecated @deprecated
    Deprecated

    (Since version ) see corresponding Javadoc for more information.

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Scheduler to any2stringadd[Scheduler]

Inherited by implicit conversion StringFormat from Scheduler to StringFormat[Scheduler]

Inherited by implicit conversion Ensuring from Scheduler to Ensuring[Scheduler]

Inherited by implicit conversion ArrowAssoc from Scheduler to ArrowAssoc[Scheduler]

Ungrouped