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Chapter 8 Decider is not a built-in type in Akka

2 replies on 1 page. Most recent reply: Nov 14, 2012 8:52 AM by Shing Hing Man

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Shing Hing Man

Posts: 9
Nickname: 84423
Registered: Oct, 2012

Chapter 8 Decider is not a built-in type in Akka Posted: Nov 13, 2012 11:49 AM
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I am using Akka 2.10.0-RC2.

The following is a minor point.
When I first look at the listing at bottom of p195 (in chapter 8), I got the impression that Decider is a built-in type in Akka. In fact it is not.

trait SupervisionStrategyFactory {
def makeStrategy(maxNrRetries: Int,withinTimeRange: Duration) (decider: Decider): SupervisorStrategy
}

I added the following obvious alias to make the above compile.
type Decider = PartialFunction[Throwable, Directive]


Shing


Derek Wyatt

Posts: 64
Nickname: dwyatt
Registered: Oct, 2012

Re: Chapter 8 Decider is not a built-in type in Akka Posted: Nov 13, 2012 6:59 PM
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Don't do that :)

This is defined in the SupervisorStrategy. You can see a number of pages previous to the one that you're reading that we did an import of akka.actor.SupervisorStrategy._ and that import will give you what you need. I don't repeat the imports for every example, and just assume that the chapter runs forward, each example building on the next.

That might not be totally clear though...

But, please remove the type alias you added and import the SupervisorStrategy._

Cheers,
Derek

Shing Hing Man

Posts: 9
Nickname: 84423
Registered: Oct, 2012

Re: Chapter 8 Decider is not a built-in type in Akka Posted: Nov 14, 2012 8:52 AM
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Silly me ! You are right.

Thanks!

Shing

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