Class ProducerController.RequestNext<T>

A send instruction sent from the ProducerController to the Producer to request the next message to be sent.

Inheritance
object
ProducerController.RequestNext<T>
Implements
Inherited Members
Namespace: Akka.Delivery
Assembly: Akka.dll
Syntax
public sealed class ProducerController.RequestNext<T> : ProducerController.IProducerCommand<T>, INoSerializationVerificationNeeded
Type Parameters
Name Description
T

Constructors

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RequestNext(string, long, long, IActorRef)

Declaration
public RequestNext(string producerId, long currentSeqNr, long confirmedSeqNr, IActorRef sendNextTo)
Parameters
Type Name Description
string producerId
long currentSeqNr
long confirmedSeqNr
IActorRef sendNextTo

Properties

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ConfirmedSeqNr

The highest confirmed seqNr observed by the producer controller.

Declaration
public long ConfirmedSeqNr { get; }
Property Value
Type Description
long
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CurrentSeqNr

The current seqNr being handled by the producer controller.

Declaration
public long CurrentSeqNr { get; }
Property Value
Type Description
long
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ProducerId

The message that will actually be delivered to consumers.

Declaration
public string ProducerId { get; }
Property Value
Type Description
string
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SendNextTo

If this field is populated, confirmation messages containing the current SeqNo (long) will be sent to this actor.

Declaration
public IActorRef SendNextTo { get; }
Property Value
Type Description
IActorRef

Methods

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AskNextTo(MessageWithConfirmation<T>)

Delivers a ProducerController.MessageWithConfirmation<T> to the SendNextTo actor.

The ReplyTo actor will receive a confirmation message containing the confirmed SeqNo (long) for this message once it's been successfully processed by the consumer.

Declaration
public void AskNextTo(ProducerController.MessageWithConfirmation<T> msgWithConfirmation)
Parameters
Type Name Description
ProducerController.MessageWithConfirmation<T> msgWithConfirmation

The message and the replyTo address.
Remarks

This method name is a bit misleading - we're actually performing a Tell, not an Ask.

The other overload does perform an Ask and uses the temporary Ask actor as the replyTo address.

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AskNextTo(T, CancellationToken)

Uses an Ask{T} to send the message to the SendNextTo actor and returns an Ack(long).

Declaration
public Task<long> AskNextTo(T msg, CancellationToken cancellationToken = default)
Parameters
Type Name Description
T msg

The message to send with confirmation back to the temporary Ask actor.
CancellationToken cancellationToken

Optional - a CancellationToken.

 Note: this token only cancels the receipt of the Ack (long) - it does not stop the message from being delivered.
Returns
Type Description
Task<long>

A task that will complete once the message has been successfully persisted by the ProducerController.

Implements

Extension Methods