trait AtLeastOnceDeliveryLike extends Eventsourced
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- AtLeastOnceDeliveryLike
- Eventsourced
- PersistenceRecovery
- PersistenceIdentity
- PersistenceStash
- StashFactory
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- RequiresMessageQueue
- UnrestrictedStash
- StashSupport
- Snapshotter
- Actor
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Type Members
- type Receive = PartialFunction[Any, Unit]
- Definition Classes
- Actor
Abstract Value Members
- abstract def persistenceId: String
Id of the persistent entity for which messages should be replayed.
Id of the persistent entity for which messages should be replayed.
- Definition Classes
- PersistenceIdentity
- abstract def receive: actor.Actor.Receive
Scala API: This defines the initial actor behavior, it must return a partial function with the actor logic.
Scala API: This defines the initial actor behavior, it must return a partial function with the actor logic.
- Definition Classes
- Actor
- abstract def receiveCommand: Receive
Command handler.
Command handler. Typically validates commands against current state (and/or by communication with other actors). On successful validation, one or more events are derived from a command and these events are then persisted by calling
persist
.- Definition Classes
- Eventsourced
- abstract def receiveRecover: Receive
Recovery handler that receives persisted events during recovery.
Recovery handler that receives persisted events during recovery. If a state snapshot has been captured and saved, this handler will receive a pekko.persistence.SnapshotOffer message followed by events that are younger than the offered snapshot.
This handler must not have side-effects other than changing persistent actor state i.e. it should not perform actions that may fail, such as interacting with external services, for example.
If there is a problem with recovering the state of the actor from the journal, the error will be logged and the actor will be stopped.
- Definition Classes
- Eventsourced
- See also
Concrete Value Members
- final def !=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def ##: Int
- Definition Classes
- AnyRef → Any
- def +(other: String): String
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toany2stringadd[AtLeastOnceDeliveryLike] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
- def ->[B](y: B): (AtLeastOnceDeliveryLike, B)
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toArrowAssoc[AtLeastOnceDeliveryLike] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
- final def ==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- def aroundPostRestart(reason: Throwable): Unit
INTERNAL API.
- def aroundPostStop(): Unit
INTERNAL API
INTERNAL API
- Attributes
- protected[pekko]
- Definition Classes
- AtLeastOnceDeliveryLike → Eventsourced → Actor
- def aroundPreRestart(reason: Throwable, message: Option[Any]): Unit
INTERNAL API
INTERNAL API
- Attributes
- protected[pekko]
- Definition Classes
- AtLeastOnceDeliveryLike → Eventsourced → Actor
- def aroundPreStart(): Unit
INTERNAL API.
- def aroundReceive(receive: Receive, message: Any): Unit
INTERNAL API
INTERNAL API
- receive
current behavior.
- Attributes
- protected[pekko]
- Definition Classes
- AtLeastOnceDeliveryLike → Eventsourced → Actor
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- def clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @HotSpotIntrinsicCandidate() @native()
- def confirmDelivery(deliveryId: Long): Boolean
Call this method when a message has been confirmed by the destination, or to abort re-sending.
Call this method when a message has been confirmed by the destination, or to abort re-sending.
- returns
true
the first time thedeliveryId
is confirmed, i.e.false
for duplicate confirm
- See also
#deliver
- implicit val context: ActorContext
Scala API: Stores the context for this actor, including self, and sender.
Scala API: Stores the context for this actor, including self, and sender. It is implicit to support operations such as
forward
.WARNING: Only valid within the Actor itself, so do not close over it and publish it to other threads!
pekko.actor.ActorContext is the Scala API.
getContext
returns a pekko.actor.AbstractActor.ActorContext, which is the Java API of the actor context.- Definition Classes
- Actor
- def deleteMessages(toSequenceNr: Long): Unit
Permanently deletes all persistent messages with sequence numbers less than or equal
toSequenceNr
.Permanently deletes all persistent messages with sequence numbers less than or equal
toSequenceNr
.If the delete is successful a pekko.persistence.DeleteMessagesSuccess will be sent to the actor. If the delete fails a pekko.persistence.DeleteMessagesFailure will be sent to the actor.
The given
toSequenceNr
must be less than or equal to Eventsourced#lastSequenceNr, otherwise pekko.persistence.DeleteMessagesFailure is sent to the actor without performing the delete. All persistent messages may be deleted without specifying the actual sequence number by usingLong.MaxValue
as thetoSequenceNr
.- toSequenceNr
upper sequence number (inclusive) bound of persistent messages to be deleted.
- Definition Classes
- Eventsourced
- def deleteSnapshot(sequenceNr: Long): Unit
Deletes the snapshot identified by
sequenceNr
.Deletes the snapshot identified by
sequenceNr
.The PersistentActor will be notified about the status of the deletion via an DeleteSnapshotSuccess or DeleteSnapshotFailure message.
- Definition Classes
- Snapshotter
- def deleteSnapshots(criteria: SnapshotSelectionCriteria): Unit
Deletes all snapshots matching
criteria
.Deletes all snapshots matching
criteria
.The PersistentActor will be notified about the status of the deletion via an DeleteSnapshotsSuccess or DeleteSnapshotsFailure message.
- Definition Classes
- Snapshotter
- def ensuring(cond: (AtLeastOnceDeliveryLike) => Boolean, msg: => Any): AtLeastOnceDeliveryLike
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toEnsuring[AtLeastOnceDeliveryLike] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: (AtLeastOnceDeliveryLike) => Boolean): AtLeastOnceDeliveryLike
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toEnsuring[AtLeastOnceDeliveryLike] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean, msg: => Any): AtLeastOnceDeliveryLike
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toEnsuring[AtLeastOnceDeliveryLike] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean): AtLeastOnceDeliveryLike
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toEnsuring[AtLeastOnceDeliveryLike] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def equals(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef → Any
- final def getClass(): Class[_ <: AnyRef]
- Definition Classes
- AnyRef → Any
- Annotations
- @HotSpotIntrinsicCandidate() @native()
- def getDeliverySnapshot: AtLeastOnceDeliverySnapshot
Full state of the
AtLeastOnceDelivery
.Full state of the
AtLeastOnceDelivery
. It can be saved with PersistentActor#saveSnapshot. During recovery the snapshot received in SnapshotOffer should be set with #setDeliverySnapshot.The
AtLeastOnceDeliverySnapshot
contains the full delivery state, including unconfirmed messages. If you need a custom snapshot for other parts of the actor state you must also include theAtLeastOnceDeliverySnapshot
. It is serialized using protobuf with the ordinary Akka serialization mechanism. It is easiest to include the bytes of theAtLeastOnceDeliverySnapshot
as a blob in your custom snapshot. - def hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @HotSpotIntrinsicCandidate() @native()
- def internalStashOverflowStrategy: StashOverflowStrategy
The returned pekko.persistence.StashOverflowStrategy object determines how to handle the message failed to stash when the internal Stash capacity exceeded.
The returned pekko.persistence.StashOverflowStrategy object determines how to handle the message failed to stash when the internal Stash capacity exceeded.
- Definition Classes
- PersistenceStash
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def journalPluginId: String
Configuration id of the journal plugin servicing this persistent actor.
Configuration id of the journal plugin servicing this persistent actor. When empty, looks in
pekko.persistence.journal.plugin
to find configuration entry path. When configured, usesjournalPluginId
as absolute path to the journal configuration entry. Configuration entry must contain few required fields, such asclass
. Seesrc/main/resources/reference.conf
.- Definition Classes
- PersistenceIdentity
- def lastSequenceNr: Long
Highest received sequence number so far or
0L
if this actor hasn't replayed or stored any persistent events yet.Highest received sequence number so far or
0L
if this actor hasn't replayed or stored any persistent events yet.- Definition Classes
- Eventsourced
- def loadSnapshot(persistenceId: String, criteria: SnapshotSelectionCriteria, toSequenceNr: Long): Unit
Instructs the snapshot store to load the specified snapshot and send it via an SnapshotOffer to the running PersistentActor.
Instructs the snapshot store to load the specified snapshot and send it via an SnapshotOffer to the running PersistentActor.
- Definition Classes
- Snapshotter
- def maxUnconfirmedMessages: Int
Maximum number of unconfirmed messages that this actor is allowed to hold in memory.
Maximum number of unconfirmed messages that this actor is allowed to hold in memory. If this number is exceed #deliver will not accept more messages and it will throw AtLeastOnceDelivery.MaxUnconfirmedMessagesExceededException.
The default value can be configured with the
pekko.persistence.at-least-once-delivery.max-unconfirmed-messages
configuration key. This method can be overridden by implementation classes to return non-default values. - final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- final def notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @HotSpotIntrinsicCandidate() @native()
- final def notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @HotSpotIntrinsicCandidate() @native()
- def numberOfUnconfirmed: Int
Number of messages that have not been confirmed yet.
- def onPersistFailure(cause: Throwable, event: Any, seqNr: Long): Unit
Called when persist fails.
Called when persist fails. By default it logs the error. Subclass may override to customize logging and for example send negative acknowledgment to sender.
The actor is always stopped after this method has been invoked.
Note that the event may or may not have been saved, depending on the type of failure.
- cause
failure cause.
- event
the event that was to be persisted
- Attributes
- protected
- Definition Classes
- Eventsourced
- Annotations
- @InternalStableApi()
- def onPersistRejected(cause: Throwable, event: Any, seqNr: Long): Unit
Called when the journal rejected
persist
of an event.Called when the journal rejected
persist
of an event. The event was not stored. By default this method logs the problem as an error, and the actor continues. The callback handler that was passed to thepersist
method will not be invoked.- cause
failure cause
- event
the event that was to be persisted
- Attributes
- protected
- Definition Classes
- Eventsourced
- Annotations
- @InternalStableApi()
- def onRecoveryFailure(cause: Throwable, event: Option[Any]): Unit
Called whenever a message replay fails.
Called whenever a message replay fails. By default it logs the error.
Subclass may override to customize logging.
The actor is always stopped after this method has been invoked.
- cause
failure cause.
- event
the event that was processed in
receiveRecover
, if the exception was thrown there
- Attributes
- protected
- Definition Classes
- Eventsourced
- def postRestart(reason: Throwable): Unit
User overridable callback: By default it calls
preStart()
.User overridable callback: By default it calls
preStart()
.- reason
the Throwable that caused the restart to happen Is called right AFTER restart on the newly created Actor to allow reinitialization after an Actor crash.
- Definition Classes
- Actor
- Annotations
- @throws(classOf[Exception])
- def postStop(): Unit
Overridden callback.
Overridden callback. Prepends all messages in the stash to the mailbox and clears the stash. Must be called when overriding this method, otherwise stashed messages won't be propagated to DeadLetters when actor stops.
- Definition Classes
- UnrestrictedStash → Actor
- Annotations
- @throws(classOf[Exception])
- def preRestart(reason: Throwable, message: Option[Any]): Unit
Overridden callback.
Overridden callback. Prepends all messages in the stash to the mailbox, clears the stash, stops all children and invokes the postStop() callback.
- reason
the Throwable that caused the restart to happen
- message
optionally the current message the actor processed when failing, if applicable Is called on a crashed Actor right BEFORE it is restarted to allow clean up of resources before Actor is terminated.
- Definition Classes
- UnrestrictedStash → Actor
- Annotations
- @throws(classOf[Exception])
- def preStart(): Unit
User overridable callback.
User overridable callback.
Is called when an Actor is started. Actors are automatically started asynchronously when created. Empty default implementation.
- Definition Classes
- Actor
- Annotations
- @throws(classOf[Exception])
- def recovery: Recovery
Called when the persistent actor is started for the first time.
Called when the persistent actor is started for the first time. The returned pekko.persistence.Recovery object defines how the Actor will recover its persistent state before handling the first incoming message.
To skip recovery completely return
Recovery.none
.- Definition Classes
- PersistenceRecovery
- def recoveryFinished: Boolean
Returns
true
if this persistent actor has successfully finished recovery.Returns
true
if this persistent actor has successfully finished recovery.- Definition Classes
- Eventsourced
- def recoveryRunning: Boolean
Returns
true
if this persistent actor is currently recovering.Returns
true
if this persistent actor is currently recovering.- Definition Classes
- Eventsourced
- def redeliverInterval: FiniteDuration
Interval between redelivery attempts.
Interval between redelivery attempts.
The default value can be configured with the
pekko.persistence.at-least-once-delivery.redeliver-interval
configuration key. This method can be overridden by implementation classes to return non-default values. - def redeliveryBurstLimit: Int
Maximum number of unconfirmed messages that will be sent at each redelivery burst (burst frequency is half of the redelivery interval).
Maximum number of unconfirmed messages that will be sent at each redelivery burst (burst frequency is half of the redelivery interval). If there's a lot of unconfirmed messages (e.g. if the destination is not available for a long time), this helps to prevent an overwhelming amount of messages to be sent at once.
The default value can be configured with the
pekko.persistence.at-least-once-delivery.redelivery-burst-limit
configuration key. This method can be overridden by implementation classes to return non-default values. - def saveSnapshot(snapshot: Any): Unit
Saves a
snapshot
of this snapshotter's state.Saves a
snapshot
of this snapshotter's state.The PersistentActor will be notified about the success or failure of this via an SaveSnapshotSuccess or SaveSnapshotFailure message.
- Definition Classes
- Snapshotter
- implicit final val self: ActorRef
The 'self' field holds the ActorRef for this actor.
The 'self' field holds the ActorRef for this actor.
Can be used to send messages to itself:
self ! message
- Definition Classes
- Actor
- final def sender(): ActorRef
The reference sender Actor of the last received message.
The reference sender Actor of the last received message. Is defined if the message was sent from another Actor, else
deadLetters
in pekko.actor.ActorSystem.WARNING: Only valid within the Actor itself, so do not close over it and publish it to other threads!
- Definition Classes
- Actor
- def setDeliverySnapshot(snapshot: AtLeastOnceDeliverySnapshot): Unit
If snapshot from #getDeliverySnapshot was saved it will be received during recovery in a SnapshotOffer message and should be set with this method.
- def snapshotPluginId: String
Configuration id of the snapshot plugin servicing this persistent actor.
Configuration id of the snapshot plugin servicing this persistent actor. When empty, looks in
pekko.persistence.snapshot-store.plugin
to find configuration entry path. When configured, usessnapshotPluginId
as absolute path to the snapshot store configuration entry. Configuration entry must contain few required fields, such asclass
. Seesrc/main/resources/reference.conf
.- Definition Classes
- PersistenceIdentity
- def snapshotSequenceNr: Long
Returns
lastSequenceNr
.Returns
lastSequenceNr
.- Definition Classes
- Eventsourced → Snapshotter
- def snapshotterId: String
Returns
persistenceId
.Returns
persistenceId
.- Definition Classes
- Eventsourced → Snapshotter
- def stash(): Unit
Adds the current message (the message that the actor received last) to the actor's stash.
Adds the current message (the message that the actor received last) to the actor's stash.
- Definition Classes
- Eventsourced → StashSupport
- Exceptions thrown
java.lang.IllegalStateException
if the same message is stashed more than oncepekko.actor.StashOverflowException
in case of a stash capacity violation
- def supervisorStrategy: SupervisorStrategy
User overridable definition the strategy to use for supervising child actors.
User overridable definition the strategy to use for supervising child actors.
- Definition Classes
- Actor
- final def synchronized[T0](arg0: => T0): T0
- Definition Classes
- AnyRef
- def toString(): String
- Definition Classes
- AnyRef → Any
- def unhandled(message: Any): Unit
User overridable callback.
User overridable callback.
Is called when a message isn't handled by the current behavior of the actor by default it fails with either a pekko.actor.DeathPactException (in case of an unhandled pekko.actor.Terminated message) or publishes an pekko.actor.UnhandledMessage to the actor's system's pekko.event.EventStream
- Definition Classes
- Eventsourced → Actor
- def unstashAll(): Unit
Prepends all messages in the stash to the mailbox, and then clears the stash.
Prepends all messages in the stash to the mailbox, and then clears the stash.
Messages from the stash are enqueued to the mailbox until the capacity of the mailbox (if any) has been reached. In case a bounded mailbox overflows, a
MessageQueueAppendFailedException
is thrown.The stash is guaranteed to be empty after calling
unstashAll()
.- Definition Classes
- Eventsourced → StashSupport
- final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException]) @native()
- final def wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- def warnAfterNumberOfUnconfirmedAttempts: Int
After this number of delivery attempts an AtLeastOnceDelivery.UnconfirmedWarning message will be sent to
self
.After this number of delivery attempts an AtLeastOnceDelivery.UnconfirmedWarning message will be sent to
self
. The count is reset after a restart.The default value can be configured with the
pekko.persistence.at-least-once-delivery.warn-after-number-of-unconfirmed-attempts
configuration key. This method can be overridden by implementation classes to return non-default values.
Deprecated Value Members
- def finalize(): Unit
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable]) @Deprecated
- Deprecated
(Since version 9)
- def formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toStringFormat[AtLeastOnceDeliveryLike] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)
instead ofvalue.formatted(formatString)
, or use thef""
string interpolator. In Java 15 and later,formatted
resolves to the new method in String which has reversed parameters.
- def →[B](y: B): (AtLeastOnceDeliveryLike, B)
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDeliveryLike toArrowAssoc[AtLeastOnceDeliveryLike] 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.