Hello Peter,
One idea you might give a spin is to extract actor behaviors into traits,
and compose behavior of a concrete actor using those.
This can work because `receive` is basically just a `PartialFunction[Any,
Unit]`, and those have a nice method called
`PartialFunction#orElse(PartialFunction): PartialFunction`
In code it might look something like this:
```
trait ProducerBehavior {
this: Actor =>
val producerBehavior: Receive = { ... }
}
trait ConsumerBehavior {
this: Actor =>
val consumerBehavior: Receive = { ... }
}
class PActor extends Actor with ProducerBehavior {
def receive = producerBehavior
}
class CActor extends Actor with ConsumerBehavior {
def receive = consumerBehavior
}
class PCActor extends Actor with ProducerBehavior with ConsumerBehavior {
def receive = producerBehavior orElse consumerBehavior
}
```
Not sure about your precise use-case, but code wise, using this you're able
to duplicate as little as possible :-)
--
Konrad
http://geecon.org
W dniu wtorek, 18 lutego 2014 20:33:23 UTC użytkownik Peter Wolf napisał:
>
> Hello, there must be a document or tutorial about this somewhere, but I
> can't find it... How do Actors implement message polymorphism?
>
> I want to make a system where some Actors are "Producers", some are
> "Consumers" and some are both "Producers and Consumers"
>
> My actual code is more complicated, so here is a stripped down version to
> concentrate on my question
>
> Producers accept the message "GimmeStuff" and respond by sending "Stuff".
> Consumers send the message "GimmeStuff" and accept "Stuff"
>
> Here they are
>
> abstract class Producer[WORK] extends Actor {
> def receive = {
> case GimmeStuff =>
> if(stuffAvailable) sender ! Stuff(nextStuff)
>
> abstract class Consumer[WORK] extends Actor {
> def receive = {
> case Stuff(stuff) =>
> doStuff(stuff)
> sender ! GImmeStuff
>
> How do I implement ProducerAndConsumer without duplicating the receive
> code?
>
> Thanks
> P
>
>
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