preStart is your friend, but also make sure you create these children in
another dispatcher, preStart is my preferred way, another way is an actor
with stash, with stash will give you less performance as the mailbox has
different requirements and the code will be less readable.
HTH,
Guido.
On Friday, February 5, 2016 at 2:07:24 PM UTC, Paul Cleary wrote:
>
> I am trying to figure out the best way to load actor state from a
> database. The actor could be a child actor of another.
>
> From what I have found, something like this would work:
>
> class MyActor extends Actor with Stash {
>
> var data: Data = _
>
> // start the actor in a loading state
> def receive = loading
>
> def loading: Receive = {
> case Loaded(data) =>
> unstashAll()
> become(ready, false)
>
> case _ => stash()
> }
>
> def ready: Receive = {
> case _ => "hi :)"
> }
>
> override def preStart() = {
> db.load().map(Loaded) pipeTo self
> }
> }
>
>
> so my problem is in dealing with failure, what to do if db.load fails? If
> db.load is a Future?
>
> What I want to happen is something like the `BackoffSupervisor` where we
> restart with a backoff. You can imagine that if there were a network / db
> issue that it could take time to recover. We should see the actor "trying"
> to restart.
>
> Does it make sense to simply throw the error to force the restart? As in
> the following example...
>
> def loading: Receive = {
> case Loaded(data) =>
> unstashAll()
> become(ready, false)
>
> case akka.status.Failure(e) => throw e
>
> case _ => stash()
> }
>
>
> Thanks!
> Paul
>
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