Initializes a new instance of the AtLeastOnceDeliveryReceiveActor class.

Initializes a new instance of the AtLeastOnceDeliveryReceiveActor class.

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Returns true if this persistent entity is currently recovering.

Returns true if this persistent entity has successfully finished recovery.

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Highest received sequence number so far or `0L` if this actor hasn't replayed or stored any persistent events yet.

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Maximum number of unconfirmed messages, that this actor is allowed to hold in the memory. if this number is exceeded, Deliver(ActorPath, FuncInt64, Object, Boolean) will not accept more messages and it will throw MaxUnconfirmedMessagesExceededException. The default value can be configure with the 'akka.persistence.at-least-once-delivery.max-unconfirmed-messages' configuration key. This method can be overridden by implementation classes to return non-default values.

Id of the persistent entity for which messages should be replayed.

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 None.

Interval between redelivery attempts. The default value can be configure with the 'akka.persistence.at-least-once-delivery.redeliver-interval' configuration key. This method can be overridden by implementation classes to return non-default values.

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 prevent an overwhelming amount of messages to be sent at once. The default value can be configure with the 'akka.persistence.at-least-once-delivery.redelivery-burst-limit' configuration key. This method can be overridden by implementation classes to return non-default values.

Gets the self ActorRef

Gets the sending ActorRef of the current message

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Returns LastSequenceNr

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Returns PersistenceId.

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Number of messages that have not been confirmed yet.

After this number of delivery attempts a UnconfirmedWarning message will be sent to Self. The count is reset after restart. The default value can be configure with the 'akka.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.

Can be overridden to intercept calls to `PostRestart`. Calls `PostRestart` by default.

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Can be overridden to intercept calls to `PreStart`. Calls `PreStart` by default.

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Changes the actor's command behavior and replaces the current receive command handler with the specified handler.

Changes the actor's command behavior and replaces the current receive handler with the specified handler.

Changes the actor's behavior and replaces the current receive handler with the specified handler.

Changes the actor's command behavior and replaces the current receive command handler with the specified handler. The current handler is stored on a stack, and you can revert to it by calling UnbecomeStacked

Changes the actor's behavior and replaces the current receive handler with the specified handler. The current handler is stored on a stack, and you can revert to it by calling UnbecomeStacked

Changes the actor's behavior and replaces the current receive handler with the specified handler. The current handler is stored on a stack, and you can revert to it by calling UnbecomeStacked

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Call this method when a message has been confirmed by the destination, or to abort re-sending.

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 PersistAsyncTEvent(TEvent, ActionTEvent) calls. That is, if PersistAsyncTEvent(TEvent, ActionTEvent) was invoked before DeferAsyncTEvent(TEvent, ActionTEvent), the corresponding handlers will be invoked in the same order as they were registered in. This call will NOT result in evt being persisted, use PersistTEvent(TEvent, ActionTEvent) or PersistAsyncTEvent(TEvent, ActionTEvent) instead if the given evt should be 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.

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.

Deletes the snapshot identified by sequenceNr. The PersistentActor will be notified about the status of the deletion via an DeleteSnapshotSuccess or DeleteSnapshotFailure message.

Deletes all snapshots matching criteria. The PersistentActor will be notified about the status of the deletion via an DeleteSnapshotsSuccess or DeleteSnapshotsFailure message.

Send the message created with deliveryMessageMapper function to the destination actor. It will retry sending the message until the delivery is confirmed with ConfirmDelivery(Int64). Correlation between these two methods is performed by deliveryId that is provided as parameter to the deliveryMessageMapper function. The deliveryId is typically passed in the message to the destination, which replies with a message containing the same 'deliveryId'. 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(Int64) was performed.

Send the message created with deliveryMessageMapper function to the destination actor. It will retry sending the message until the delivery is confirmed with ConfirmDelivery(Int64). Correlation between these two methods is performed by deliveryId that is provided as parameter to the deliveryMessageMapper function. The deliveryId is typically passed in the message to the destination, which replies with a message containing the same 'deliveryId'. 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(Int64) was performed.

Determines whether the specified object is equal to the current object.

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.

Full state of the AtLeastOnceDeliverySemantic. It can be saved with SaveSnapshot(Object). During recovery the snapshot received in SnapshotOffer should be set with SetDeliverySnapshot(AtLeastOnceDeliverySnapshot). 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.

Serves as the default hash function.

Gets the Type of the current instance.

Instructs the snapshot store to load the specified snapshot and send it via an SnapshotOffer to the running PersistentActor.

Creates a shallow copy of the current Object.

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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.

Called when the journal rejected PersistTEvent(TEvent, ActionTEvent) of an event. The event was not stored. By default this method logs the problem as a warning, and the actor continues. The callback handler that was passed to the PersistTEvent(TEvent, ActionTEvent) method will not be invoked.

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Called whenever a message replay fails. By default it log the errors.

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Asynchronously persists an event. On successful persistence, the handler is called with the persisted event. This method guarantees that no new commands will be received by a persistent actor between a call to PersistTEvent(TEvent, ActionTEvent) and execution of it's handler. It also holds multiple persist calls per received command. Internally this is done by stashing. The stash used for that is an internal stash which doesn't interfere with the inherited user stash. An event handler may close over eventsourced actor state and modify it. Sender of the persistent event is considered a sender of the corresponding command. That means one can respond to sender from within an event handler. 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(Exception, Object, Int64) 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.

Asynchronously persists series of events in specified order. This is equivalent of multiple calls of PersistTEvent(TEvent, ActionTEvent) calls with the same handler, except that events are persisted atomically with this method.

Asynchronously persists series of events in specified order. This is equivalent of multiple calls of PersistAsyncTEvent(TEvent, ActionTEvent) calls with the same handler, except that events are persisted atomically with this method.

Asynchronously persists an event. On successful persistence, the handler is called with the persisted event. Unlike PersistTEvent(TEvent, ActionTEvent) method, this one will continue to receive incoming commands between calls and executing it's event handler. This version should be used in favor of PersistTEvent(TEvent, ActionTEvent) method when throughput is more important that commands execution precedence. An event handler may close over eventsourced actor state and modify it. Sender of the persistent event is considered a sender of the corresponding command. That means, one can respond to sender from within an event handler. 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(Exception, Object, Int64) 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.

User overridable callback: By default it calls `PreStart()`.

Is called right AFTER restart on the newly created Actor to allow reinitialization after an Actor crash.

User overridable callback.

Is called asynchronously after 'actor.stop()' is invoked. Empty default implementation.

User overridable callback: '''By default it disposes of all children and then calls `postStop()`.'''

Is called on a crashed Actor right BEFORE it is restarted to allow clean up of resources before Actor is terminated.

User overridable callback.

Is called when an Actor is started. Actors are automatically started asynchronously when created. Empty default implementation.

Processor for user defined messages.

Command handler. Typically validates commands against current state - possibly by communicating with other actors. On successful validation, one or more events are derived from command and persisted.

Recovery handler that receives persistent 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 offer itself. 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.

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Saves snapshot of current ISnapshotter state. The PersistentActor will be notified about the success or failure of this via an SaveSnapshotSuccess or SaveSnapshotFailure message.

If snapshot from GetDeliverySnapshot was saved it will be received during recovery phase in a SnapshotOffer message and should be set with this method.

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Returns a string that represents the current object.

Reverts the Actor behavior to the previous one on the behavior stack.

Is called when a message isn't handled by the current behavior of the actor by default it fails with either a DeathPactException (in case of an unhandled Terminated message) or publishes an UnhandledMessage to the actor's system's EventStream

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Matches the specified target.

Matches the specified target and return a result of target processing.