/// <summary>
/// Send the message created with <paramref name="deliveryMessageMapper"/> function to the <see cref="destination"/>
/// actor. It will retry sending the message until the delivery is confirmed with <see cref="ConfirmDelivery"/>.
/// Correlation between these two methods is performed by delivery id - parameter of <see cref="deliveryMessageMapper"/>.
/// Usually it's passed inside the message to the destination, which replies with the message having the same id.
///
/// During recovery this method won't send out any message, but it will be sent later until corresponding
/// <see cref="ConfirmDelivery"/> method will be invoked.
/// </summary>
/// <exception cref="MaxUnconfirmedMessagesExceededException">
/// Thrown when <see cref="UnconfirmedCount"/> is greater than or equal to <see cref="MaxUnconfirmedMessages"/>.
/// </exception>
public void Deliver(ActorPath destination, Func<long, object> deliveryMessageMapper)
{
if (UnconfirmedCount >= MaxUnconfirmedMessages)
{
throw new MaxUnconfirmedMessagesExceededException(string.Format("{0} has too many unconfirmed messages. Maximum allowed is {1}", PersistenceId, MaxUnconfirmedMessages));
}
var deliveryId = NextDeliverySequenceNr();
var now = IsRecovering ? DateTime.Now - RedeliverInterval : DateTime.Now;
var delivery = new Delivery(destination, deliveryMessageMapper(deliveryId), now, attempt: 0);
if (IsRecovering)
{
_unconfirmed.AddOrUpdate(deliveryId, delivery, (id, d) => delivery);
}
else
{
Send(deliveryId, delivery, now);
}
}
private void Send(long deliveryId, Delivery delivery, DateTime timestamp)
{
var destination = Context.ActorSelection(delivery.Destination);
destination.Tell(delivery.Message);
var dcopy = new Delivery(delivery.Destination, delivery.Message, timestamp, delivery.Attempt + 1);
_unconfirmed.AddOrUpdate(deliveryId, dcopy, (id, d) => dcopy);
}
private void Send(long deliveryId, Delivery delivery, DateTime timestamp)
{
_context.ActorSelection(delivery.Destination).Tell(delivery.Message);
_unconfirmed = _unconfirmed.SetItem(deliveryId, new Delivery(delivery.Destination, delivery.Message, timestamp, delivery.Attempt + 1));
StartRedeliverTask();
}