Hi there
I'm currently migrating from Akka 1.x to 2.2.3 and stumbled across the
following behaviour in TypedActor:
trait Squarer {
def squareNow(i: Int): Int //blocking send-request-reply
}
class SquarerImpl extends Squarer {
def squareNow(i: Int): Int = throw new Exception("what??")
}
In Akka 1.x: My own java.lang.Exception is thrown
In Akka 2.x: My own java.lang.Exception is encapsulated in the thrown
java.lang.reflect.UndeclaredThrowableException
To have the same behaviour in 1.x and 2.x, I need to annote the trait
method(s) with @throws(classOf[XXX]) to declare that an exception might be
thrown.
trait Squarer {
@throws(classOf[Exception])
def squareNow(i: Int): Option[Int] //blocking send-request-reply
}
My questions:
1.
Taken from http://doc.akka.io/docs/akka/2.2.3/scala/typed-actors.html
"Any other type of value will use send-request-reply semantics, but *will*block
to wait for an answer, throwing
java.util.concurrent.TimeoutException if there was a timeout *or rethrow
any exception that was thrown during this call.*"
Is this the intended behaviour (UndeclaredThrowableException)?
2. Is it "good practice" to throw exceptions in blocking send-request-reply
methods in general or should it better be handled by other mechanisms like
net.liftweb.common.Box?
Thanks for your help!
Daniel
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