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Boot.scala
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Fri, Sep 13, 01:01

Boot.scala
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import akka.actor.{ActorRef, ActorSystem, Props}
import net.shrine.problem.{AbstractProblem, ProblemConfigSource, ProblemHandler, ProblemSources}
import spray.servlet.WebBoot
import scala.util.control.NonFatal
// this class is instantiated by the servlet initializer
// it needs to have a default constructor and implement
// the spray.servlet.WebBoot trait
class Boot extends WebBoot {
// we need an ActorSystem to host our application in
override val system = startActorSystem()
// the service actor replies to incoming HttpRequests
override val serviceActor: ActorRef = startServiceActor()
def startActorSystem() = try ActorSystem("MetaDataActors",MetaConfigSource.config)
catch {
case NonFatal(x) => CannotStartMetaData(x); throw x
case x: ExceptionInInitializerError => CannotStartMetaData(x); throw x
}
def startServiceActor() = try {
//TODO: create a common interface for Problems to hide behind, so that it doesn't exist anywhere in the code
//TODO: except for when brought into scope by a DatabaseProblemHandler
val handler:ProblemHandler = ProblemConfigSource.getObject("shrine.problem.problemHandler", ProblemConfigSource.config)
handler.warmUp()
// the service actor replies to incoming HttpRequests
system.actorOf(Props[MetaDataActor])
}
catch {
case NonFatal(x) => CannotStartMetaData(x); throw x
case x: ExceptionInInitializerError => CannotStartMetaData(x); throw x
}
}
case class CannotStartMetaData(ex:Throwable) extends AbstractProblem(ProblemSources.Dsa) {
override def summary: String = "The MetaData API could not start due to an exception."
override def description: String = s"The MetaData API could not start due to ${throwable.get}"
override def throwable = Some(ex)
}

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