trait AtLeastOnceDelivery extends PersistentActor with AtLeastOnceDeliveryLike
Scala API: Mix-in this trait with your PersistentActor
to send messages with at-least-once
delivery semantics to destinations. It takes care of re-sending messages when they
have not been confirmed within a configurable timeout. Use the AtLeastOnceDeliveryLike#deliver method to
send a message to a destination. Call the AtLeastOnceDeliveryLike#confirmDelivery method when the destination
has replied with a confirmation message.
At-least-once delivery implies that original message send order is not always retained and the destination may receive duplicate messages due to possible resends.
The interval between redelivery attempts can be defined by AtLeastOnceDeliveryLike#redeliverInterval.
After a number of delivery attempts a AtLeastOnceDelivery.UnconfirmedWarning message
will be sent to self
. The re-sending will still continue, but you can choose to call
AtLeastOnceDeliveryLike#confirmDelivery to cancel the re-sending.
The AtLeastOnceDelivery
trait has a state consisting of unconfirmed messages and a
sequence number. It does not store this state itself. You must persist events corresponding
to the deliver
and confirmDelivery
invocations from your PersistentActor
so that the
state can be restored by calling the same methods during the recovery phase of the
PersistentActor
. Sometimes these events can be derived from other business level events,
and sometimes you must create separate events. During recovery calls to deliver
will not send out the message, but it will be sent later if no matching confirmDelivery
was performed.
Support for snapshots is provided by AtLeastOnceDeliveryLike#getDeliverySnapshot and AtLeastOnceDeliveryLike#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 the
AtLeastOnceDeliverySnapshot
. It is serialized using protobuf with the ordinary Akka
serialization mechanism. It is easiest to include the bytes of the AtLeastOnceDeliverySnapshot
as a blob in your custom snapshot.
- Source
- AtLeastOnceDelivery.scala
- See also
AbstractPersistentActorWithAtLeastOnceDelivery for Java API
- Alphabetic
- By Inheritance
- AtLeastOnceDelivery
- AtLeastOnceDeliveryLike
- PersistentActor
- Eventsourced
- PersistenceRecovery
- PersistenceIdentity
- PersistenceStash
- StashFactory
- Stash
- RequiresMessageQueue
- UnrestrictedStash
- StashSupport
- Snapshotter
- Actor
- AnyRef
- Any
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
- Hide All
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- Public
- Protected
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 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 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 AtLeastOnceDelivery toany2stringadd[AtLeastOnceDelivery] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
- def ->[B](y: B): (AtLeastOnceDelivery, B)
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDelivery toArrowAssoc[AtLeastOnceDelivery] 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
- Definition Classes
- AtLeastOnceDeliveryLike
- See also
- 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 defer[A](event: A)(handler: (A) => Unit): Unit
Defer the handler execution until all pending handlers have been executed.
Defer the handler execution until all pending handlers have been executed. It is guaranteed that no new commands will be received by a persistent actor between a call to
defer
and the execution of itshandler
. Allows to define logic within the actor, which will respect the invocation-order-guarantee in respect topersistAsync
orpersist
calls. That is, ifpersistAsync
orpersist
was invoked beforedefer
, the corresponding handlers will be invoked in the same order as they were registered in.This call will NOT result in
event
being persisted, usepersist
orpersistAsync
instead if the given event should possible to replay.If there are no pending persist handler calls, the handler will be called immediately.
If persistence of an earlier event fails, the persistent actor will stop, and the
handler
will not be run.- event
event to be handled in the future, when preceding persist operations have been processes
- handler
handler for the given
event
- Definition Classes
- PersistentActor
- def deferAsync[A](event: A)(handler: (A) => Unit): Unit
Defer the handler execution until all pending handlers have been executed.
Defer the handler execution until all pending handlers have been executed. Allows to define logic within the actor, which will respect the invocation-order-guarantee in respect to
persistAsync
orpersist
calls. That is, ifpersistAsync
orpersist
was invoked beforedeferAsync
, the corresponding handlers will be invoked in the same order as they were registered in.This call will NOT result in
event
being persisted, usepersist
orpersistAsync
instead if the given event should possible to replay.If there are no pending persist handler calls, the handler will be called immediately.
If persistence of an earlier event fails, the persistent actor will stop, and the
handler
will not be run.- event
event to be handled in the future, when preceding persist operations have been processes
- handler
handler for the given
event
- Definition Classes
- PersistentActor
- 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 DeleteMessagesSuccess will be sent to the actor. If the delete fails a DeleteMessagesFailure will be sent to the actor.
The given
toSequenceNr
must be less than or equal to Eventsourced#lastSequenceNr, otherwise 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 deliver(destination: ActorSelection)(deliveryIdToMessage: (Long) => Any): Unit
Scala API: Send the message created by the
deliveryIdToMessage
function to thedestination
actor.Scala API: Send the message created by the
deliveryIdToMessage
function to thedestination
actor. It will retry sending the message until the delivery is confirmed with #confirmDelivery. Correlation betweendeliver
andconfirmDelivery
is performed with thedeliveryId
that is provided as parameter to thedeliveryIdToMessage
function. ThedeliveryId
is typically passed in the message to the destination, which replies with a message containing the samedeliveryId
.The
deliveryId
is a strictly monotonically increasing sequence number without gaps. The same sequence is used for all destinations of the actor, i.e. when sending to multiple destinations the destinations will see gaps in the sequence if no translation is performed.During recovery this method will not send out the message, but it will be sent later if no matching
confirmDelivery
was performed.This method will throw AtLeastOnceDelivery.MaxUnconfirmedMessagesExceededException if #numberOfUnconfirmed is greater than or equal to #maxUnconfirmedMessages.
- def deliver(destination: ActorPath)(deliveryIdToMessage: (Long) => Any): Unit
Scala API: Send the message created by the
deliveryIdToMessage
function to thedestination
actor.Scala API: Send the message created by the
deliveryIdToMessage
function to thedestination
actor. It will retry sending the message until the delivery is confirmed with #confirmDelivery. Correlation betweendeliver
andconfirmDelivery
is performed with thedeliveryId
that is provided as parameter to thedeliveryIdToMessage
function. ThedeliveryId
is typically passed in the message to the destination, which replies with a message containing the samedeliveryId
.The
deliveryId
is a strictly monotonically increasing sequence number without gaps. The same sequence is used for all destinations of the actor, i.e. when sending to multiple destinations the destinations will see gaps in the sequence if no translation is performed.During recovery this method will not send out the message, but it will be sent later if no matching
confirmDelivery
was performed.This method will throw AtLeastOnceDelivery.MaxUnconfirmedMessagesExceededException if #numberOfUnconfirmed is greater than or equal to #maxUnconfirmedMessages.
- def ensuring(cond: (AtLeastOnceDelivery) => Boolean, msg: => Any): AtLeastOnceDelivery
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDelivery toEnsuring[AtLeastOnceDelivery] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: (AtLeastOnceDelivery) => Boolean): AtLeastOnceDelivery
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDelivery toEnsuring[AtLeastOnceDelivery] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean, msg: => Any): AtLeastOnceDelivery
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDelivery toEnsuring[AtLeastOnceDelivery] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean): AtLeastOnceDelivery
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDelivery toEnsuring[AtLeastOnceDelivery] 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.- Definition Classes
- AtLeastOnceDeliveryLike
- def hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @HotSpotIntrinsicCandidate() @native()
- def internalStashOverflowStrategy: StashOverflowStrategy
The returned StashOverflowStrategy object determines how to handle the message failed to stash when the internal Stash capacity exceeded.
The returned 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.- Definition Classes
- AtLeastOnceDeliveryLike
- 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.
Number of messages that have not been confirmed yet.
- Definition Classes
- AtLeastOnceDeliveryLike
- 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 persist[A](event: A)(handler: (A) => Unit): Unit
Asynchronously persists
event
.Asynchronously persists
event
. On successful persistence,handler
is called with the persisted event. It is guaranteed that no new commands will be received by a persistent actor between a call topersist
and the execution of itshandler
. This also holds for multiplepersist
calls per received command. Internally, this is achieved by stashing new commands and unstashing them when theevent
has been persisted and handled. The stash used for that is an internal stash which doesn't interfere with the inherited user stash.An event
handler
may close over persistent actor state and modify it. Thesender
of a persisted event is the sender of the corresponding command. This means that one can reply to a command sender within an eventhandler
.Within an event handler, applications usually update persistent actor state using persisted event data, notify listeners and reply to command senders.
If persistence of an event fails, #onPersistFailure will be invoked and the actor will unconditionally be stopped. The reason that it cannot resume when persist fails is that it is unknown if the event was actually persisted or not, and therefore it is in an inconsistent state. Restarting on persistent failures will most likely fail anyway, since the journal is probably unavailable. It is better to stop the actor and after a back-off timeout start it again.
- event
event to be persisted
- handler
handler for each persisted
event
- Definition Classes
- PersistentActor
- def persistAll[A](events: Seq[A])(handler: (A) => Unit): Unit
Asynchronously persists
events
in specified order.Asynchronously persists
events
in specified order. This is equivalent to callingpersist[A](event: A)(handler: A => Unit)
multiple times with the samehandler
, except thatevents
are persisted atomically with this method.- events
events to be persisted
- handler
handler for each persisted
events
- Definition Classes
- PersistentActor
- def persistAllAsync[A](events: Seq[A])(handler: (A) => Unit): Unit
Asynchronously persists
events
in specified order.Asynchronously persists
events
in specified order. This is equivalent to callingpersistAsync[A](event: A)(handler: A => Unit)
multiple times with the samehandler
, except thatevents
are persisted atomically with this method.- events
events to be persisted
- handler
handler for each persisted
events
- Definition Classes
- PersistentActor
- def persistAsync[A](event: A)(handler: (A) => Unit): Unit
Asynchronously persists
event
.Asynchronously persists
event
. On successful persistence,handler
is called with the persisted event.Unlike
persist
the persistent actor will continue to receive incoming commands between the call topersist
and executing it'shandler
. This asynchronous, non-stashing, version of of persist should be used when you favor throughput over the "command-2 only processed after command-1 effects' have been applied" guarantee, which is provided by the plainpersist
method.An event
handler
may close over persistent actor state and modify it. Thesender
of a persisted event is the sender of the corresponding command. This means that one can reply to a command sender within an eventhandler
.If persistence of an event fails, #onPersistFailure will be invoked and the actor will unconditionally be stopped. The reason that it cannot resume when persist fails is that it is unknown if the event was actually persisted or not, and therefore it is in an inconsistent state. Restarting on persistent failures will most likely fail anyway, since the journal is probably unavailable. It is better to stop the actor and after a back-off timeout start it again.
- event
event to be persisted
- handler
handler for each persisted
event
- Definition Classes
- PersistentActor
- 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 receive: 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
- PersistentActor → Actor
- 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 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.- Definition Classes
- AtLeastOnceDeliveryLike
- 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.- Definition Classes
- AtLeastOnceDeliveryLike
- 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.
If snapshot from #getDeliverySnapshot was saved it will be received during recovery in a SnapshotOffer message and should be set with this method.
- Definition Classes
- AtLeastOnceDeliveryLike
- 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
IllegalStateException
if the same message is stashed more than onceStashOverflowException
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.- Definition Classes
- AtLeastOnceDeliveryLike
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 AtLeastOnceDelivery toStringFormat[AtLeastOnceDelivery] 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): (AtLeastOnceDelivery, B)
- Implicit
- This member is added by an implicit conversion from AtLeastOnceDelivery toArrowAssoc[AtLeastOnceDelivery] 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.