Let's say I have an actor that interacts with an FTP server (which is done
by blocking code from an existing FTP lib).
I have code that uses '?' like this:
val response:Future[Boolean] = ftpActor ? DoesFileExist("filename")
What is the best way to model a general error. I've read that using try
catch in the actor is not the best way to do it
(http://doc.akka.io/docs/akka/snapshot/java/howto.html#Single-Use_Actor_Trees_with_High-Level_Error_Reporting).
This custom supervision described in that howto is not what I'm aiming for.
The ftpActor works 99% of the time, but for the instances that it doesn't,
the ftpActor doesn't notify the sender of this failure.
Examples could be an incorrectly configured username password.
The caller of DoesFileExist receives a timeout exception which is not
really what's going on.
So what's generally the best way to have a unhappy path with such an actor?
I really don't want to add more actors into the equation, just to support
the unhappy flow.
Thanks,
Jaap
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