Packages

class LightArrayRevolverScheduler extends Scheduler with Closeable

This scheduler implementation is based on a revolving wheel of buckets, like Netty’s HashedWheelTimer, which it advances at a fixed tick rate and dispatches tasks it finds in the current bucket to their respective ExecutionContexts. The tasks are held in TaskHolders, which upon cancellation null out their reference to the actual task, leaving only this shell to be cleaned up when the wheel reaches that bucket next time. This enables the use of a simple linked list to chain the TaskHolders off the wheel.

Also noteworthy is that this scheduler does not obtain a current time stamp when scheduling single-shot tasks, instead it always rounds up the task delay to a full multiple of the TickDuration. This means that tasks are scheduled possibly one tick later than they could be (if checking that “now() + delay <= nextTick” were done).

Source
LightArrayRevolverScheduler.scala
Linear Supertypes
Closeable, AutoCloseable, Scheduler, AnyRef, Any
Type Hierarchy
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Inherited
  1. LightArrayRevolverScheduler
  2. Closeable
  3. AutoCloseable
  4. Scheduler
  5. AnyRef
  6. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new LightArrayRevolverScheduler(config: Config, log: LoggingAdapter, threadFactory: ThreadFactory)

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 LightArrayRevolverScheduler toany2stringadd[LightArrayRevolverScheduler] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (LightArrayRevolverScheduler, B)
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toArrowAssoc[LightArrayRevolverScheduler] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. val ShutdownTimeout: FiniteDuration
  7. val TickDuration: FiniteDuration
  8. val WheelSize: Int
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def clock(): Long

    Clock implementation is replaceable (for testing); the implementation must return a monotonically increasing series of Long nanoseconds.

    Clock implementation is replaceable (for testing); the implementation must return a monotonically increasing series of Long nanoseconds.

    Attributes
    protected
  11. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @HotSpotIntrinsicCandidate() @native()
  12. def close(): Unit
    Definition Classes
    LightArrayRevolverScheduler → Closeable → AutoCloseable
  13. def ensuring(cond: (LightArrayRevolverScheduler) => Boolean, msg: => Any): LightArrayRevolverScheduler
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toEnsuring[LightArrayRevolverScheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: (LightArrayRevolverScheduler) => Boolean): LightArrayRevolverScheduler
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toEnsuring[LightArrayRevolverScheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean, msg: => Any): LightArrayRevolverScheduler
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toEnsuring[LightArrayRevolverScheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: Boolean): LightArrayRevolverScheduler
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toEnsuring[LightArrayRevolverScheduler] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  19. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @HotSpotIntrinsicCandidate() @native()
  20. def getShutdownTimeout: FiniteDuration

    Overridable for tests

    Overridable for tests

    Attributes
    protected
  21. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @HotSpotIntrinsicCandidate() @native()
  22. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  23. val maxFrequency: Double

    The maximum supported task frequency of this scheduler, i.e.

    The maximum supported task frequency of this scheduler, i.e. the inverse of the minimum time interval between executions of a recurring task, in Hz.

    Definition Classes
    LightArrayRevolverScheduler → Scheduler
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @HotSpotIntrinsicCandidate() @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @HotSpotIntrinsicCandidate() @native()
  27. def schedule(initialDelay: FiniteDuration, delay: FiniteDuration, runnable: Runnable)(implicit executor: ExecutionContext): Cancellable

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Definition Classes
    LightArrayRevolverScheduler → Scheduler
  28. final def scheduleAtFixedRate(initialDelay: Duration, interval: Duration, receiver: ActorRef, message: Any, executor: ExecutionContext, sender: ActorRef): Cancellable

    Java API: Schedules a message to be sent repeatedly with an initial delay and frequency.

    Java API: Schedules a message to be sent repeatedly with an initial delay and frequency. E.g. if you would like a message to be sent immediately and thereafter every 500ms you would set delay=Duration.ZERO and interval=Duration.ofMillis(500)

    It will compensate the delay for a subsequent message if the sending of previous message was delayed more than specified. In such cases, the actual message interval will differ from the interval passed to the method.

    If the execution is delayed longer than the interval, the subsequent message will be sent immediately after the prior one. This also has the consequence that after long garbage collection pauses or other reasons when the JVM was suspended all "missed" messages will be sent when the process wakes up again.

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

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

    Note: For scheduling within actors AbstractActorWithTimers should be preferred.

    Definition Classes
    Scheduler
  29. final def scheduleAtFixedRate(initialDelay: FiniteDuration, interval: FiniteDuration, receiver: ActorRef, message: Any)(implicit executor: ExecutionContext, sender: ActorRef = Actor.noSender): Cancellable

    Scala API: Schedules a message to be sent repeatedly with an initial delay and frequency.

    Scala API: Schedules a message to be sent repeatedly with an initial delay and frequency. E.g. if you would like a message to be sent immediately and thereafter every 500ms you would set delay=Duration.Zero and interval=Duration(500, TimeUnit.MILLISECONDS)

    It will compensate the delay for a subsequent message if the sending of previous message was delayed more than specified. In such cases, the actual message interval will differ from the interval passed to the method.

    If the execution is delayed longer than the interval, the subsequent message will be sent immediately after the prior one. This also has the consequence that after long garbage collection pauses or other reasons when the JVM was suspended all "missed" messages will be sent when the process wakes up again.

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

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

    Note: For scheduling within actors with Timers should be preferred.

    Definition Classes
    Scheduler
    Annotations
    @nowarn()
  30. final 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.

    Definition Classes
    Scheduler
    Exceptions thrown

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

  31. final 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.

    Definition Classes
    Scheduler
    Annotations
    @nowarn()
    Exceptions thrown

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

  32. 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.

    Definition Classes
    LightArrayRevolverScheduler → Scheduler
    Exceptions thrown

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

  33. def scheduleOnce(delay: Duration, runnable: Runnable)(implicit 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.

    Definition Classes
    Scheduler
    Exceptions thrown

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

  34. final def scheduleOnce(delay: FiniteDuration)(f: => Unit)(implicit executor: ExecutionContext): Cancellable

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

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

    Definition Classes
    Scheduler
    Exceptions thrown

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

  35. final def scheduleOnce(delay: Duration, receiver: ActorRef, message: Any, executor: ExecutionContext, sender: ActorRef): Cancellable

    Java API: Schedules a message to be sent once with a delay, i.e.

    Java API: Schedules a message to be sent once with a delay, i.e. a time period that has to pass before the message is sent.

    Definition Classes
    Scheduler
    Exceptions thrown

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

  36. final def scheduleOnce(delay: FiniteDuration, receiver: ActorRef, message: Any)(implicit executor: ExecutionContext, sender: ActorRef = Actor.noSender): Cancellable

    Scala API: Schedules a message to be sent once with a delay, i.e.

    Scala API: Schedules a message to be sent once with a delay, i.e. a time period that has to pass before the message is sent.

    Definition Classes
    Scheduler
    Exceptions thrown

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

  37. 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.

    Definition Classes
    LightArrayRevolverScheduler → Scheduler
    Exceptions thrown

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

  38. final def scheduleWithFixedDelay(initialDelay: Duration, delay: Duration, receiver: ActorRef, message: Any, executor: ExecutionContext, sender: ActorRef): Cancellable

    Java API: Schedules a message to be sent repeatedly with an initial delay and a fixed delay between messages.

    Java API: Schedules a message to be sent repeatedly with an initial delay and a fixed delay between messages. E.g. if you would like a message to be sent immediately and thereafter every 500ms you would set delay=Duration.ZERO and interval=Duration.ofMillis(500).

    It will not compensate the delay between messages if scheduling is delayed longer than specified for some reason. The delay between sending of subsequent messages will always be (at least) the given delay.

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

    Note: For scheduling within actors AbstractActorWithTimers should be preferred.

    Definition Classes
    Scheduler
  39. final def scheduleWithFixedDelay(initialDelay: FiniteDuration, delay: FiniteDuration, receiver: ActorRef, message: Any)(implicit executor: ExecutionContext, sender: ActorRef = Actor.noSender): Cancellable

    Scala API: Schedules a message to be sent repeatedly with an initial delay and a fixed delay between messages.

    Scala API: Schedules a message to be sent repeatedly with an initial delay and a fixed delay between messages. E.g. if you would like a message to be sent immediately and thereafter every 500ms you would set delay=Duration.Zero and interval=Duration(500, TimeUnit.MILLISECONDS).

    It will not compensate the delay between messages if scheduling is delayed longer than specified for some reason. The delay between sending of subsequent messages will always be (at least) the given delay.

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

    Note: For scheduling within actors with Timers should be preferred.

    Definition Classes
    Scheduler
  40. final 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.

    Definition Classes
    Scheduler
    Exceptions thrown

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

  41. def startTick: Int

    Replaceable for testing.

    Replaceable for testing.

    Attributes
    protected
  42. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  43. def toString(): String
    Definition Classes
    AnyRef → Any
  44. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  45. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  46. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  47. def waitNanos(nanos: Long): Unit

    Overridable for tests

    Overridable for tests

    Attributes
    protected

Deprecated Value Members

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

    (Since version 9)

  2. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toStringFormat[LightArrayRevolverScheduler] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.12.16) Use formatString.format(value) instead of value.formatted(formatString), or use the f"" string interpolator. In Java 15 and later, formatted resolves to the new method in String which has reversed parameters.

  3. def schedule(initialDelay: Duration, interval: Duration, runnable: Runnable)(implicit executor: ExecutionContext): Cancellable

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Definition Classes
    Scheduler
    Annotations
    @deprecated
    Deprecated

    (Since version 2.6.0) Use scheduleWithFixedDelay or scheduleAtFixedRate instead. This has the same semantics as scheduleAtFixedRate, but scheduleWithFixedDelay is often preferred.

  4. final def schedule(initialDelay: FiniteDuration, interval: FiniteDuration)(f: => Unit)(implicit executor: ExecutionContext): Cancellable

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Definition Classes
    Scheduler
    Annotations
    @deprecated
    Deprecated

    (Since version 2.6.0) Use scheduleWithFixedDelay or scheduleAtFixedRate instead. This has the same semantics as scheduleAtFixedRate, but scheduleWithFixedDelay is often preferred.

  5. final def schedule(initialDelay: Duration, interval: Duration, receiver: ActorRef, message: Any, executor: ExecutionContext, sender: ActorRef): Cancellable

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Definition Classes
    Scheduler
    Annotations
    @deprecated
    Deprecated

    (Since version 2.6.0) Use scheduleWithFixedDelay or scheduleAtFixedRate instead. This has the same semantics as scheduleAtFixedRate, but scheduleWithFixedDelay is often preferred.

  6. final def schedule(initialDelay: FiniteDuration, interval: FiniteDuration, receiver: ActorRef, message: Any)(implicit executor: ExecutionContext, sender: ActorRef = Actor.noSender): Cancellable

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Deprecated API: See Scheduler#scheduleWithFixedDelay or Scheduler#scheduleAtFixedRate.

    Definition Classes
    Scheduler
    Annotations
    @deprecated
    Deprecated

    (Since version 2.6.0) Use scheduleWithFixedDelay or scheduleAtFixedRate instead. This has the same semantics as scheduleAtFixedRate, but scheduleWithFixedDelay is often preferred.

  7. def →[B](y: B): (LightArrayRevolverScheduler, B)
    Implicit
    This member is added by an implicit conversion from LightArrayRevolverScheduler toArrowAssoc[LightArrayRevolverScheduler] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from Closeable

Inherited from AutoCloseable

Inherited from Scheduler

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd fromLightArrayRevolverScheduler to any2stringadd[LightArrayRevolverScheduler]

Inherited by implicit conversion StringFormat fromLightArrayRevolverScheduler to StringFormat[LightArrayRevolverScheduler]

Inherited by implicit conversion Ensuring fromLightArrayRevolverScheduler to Ensuring[LightArrayRevolverScheduler]

Inherited by implicit conversion ArrowAssoc fromLightArrayRevolverScheduler to ArrowAssoc[LightArrayRevolverScheduler]

Ungrouped