t

akka.persistence.journal

AsyncRecovery

trait AsyncRecovery extends AnyRef

Asynchronous message replay and sequence number recovery interface.

Source
AsyncRecovery.scala
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Abstract Value Members

  1. abstract def asyncReadHighestSequenceNr(persistenceId: String, fromSequenceNr: Long): Future[Long]

    Plugin API: asynchronously reads the highest stored sequence number for the given persistenceId.

    Plugin API: asynchronously reads the highest stored sequence number for the given persistenceId. The persistent actor will use the highest sequence number after recovery as the starting point when persisting new events. This sequence number is also used as toSequenceNr in subsequent call to #asyncReplayMessages unless the user has specified a lower toSequenceNr. Journal must maintain the highest sequence number and never decrease it.

    This call is protected with a circuit-breaker.

    Please also note that requests for the highest sequence number may be made concurrently to writes executing for the same persistenceId, in particular it is possible that a restarting actor tries to recover before its outstanding writes have completed.

    persistenceId

    persistent actor id.

    fromSequenceNr

    hint where to start searching for the highest sequence number. When a persistent actor is recovering this fromSequenceNr will be the sequence number of the used snapshot or 0L if no snapshot is used.

  2. abstract def asyncReplayMessages(persistenceId: String, fromSequenceNr: Long, toSequenceNr: Long, max: Long)(recoveryCallback: (PersistentRepr) ⇒ Unit): Future[Unit]

    Plugin API: asynchronously replays persistent messages.

    Plugin API: asynchronously replays persistent messages. Implementations replay a message by calling replayCallback. The returned future must be completed when all messages (matching the sequence number bounds) have been replayed. The future must be completed with a failure if any of the persistent messages could not be replayed.

    The replayCallback must also be called with messages that have been marked as deleted. In this case a replayed message's deleted method must return true.

    The toSequenceNr is the lowest of what was returned by #asyncReadHighestSequenceNr and what the user specified as recovery akka.persistence.Recovery parameter. This does imply that this call is always preceded by reading the highest sequence number for the given persistenceId.

    This call is NOT protected with a circuit-breaker because it may take long time to replay all events. The plugin implementation itself must protect against an unresponsive backend store and make sure that the returned Future is completed with success or failure within reasonable time. It is not allowed to ignore completing the future.

    persistenceId

    persistent actor id.

    fromSequenceNr

    sequence number where replay should start (inclusive).

    toSequenceNr

    sequence number where replay should end (inclusive).

    max

    maximum number of messages to be replayed.

    recoveryCallback

    called to replay a single message. Can be called from any thread.

    See also

    AsyncWriteJournal

Concrete Value Members

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

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
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    @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 AsyncRecovery to any2stringadd[AsyncRecovery]

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

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

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

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