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Boot.scala
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Sun, Aug 25, 07:07

Boot.scala
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package net.shrine.dashboard
import akka.actor.{ActorRef, ActorSystem, Props}
import net.shrine.log.Log
import net.shrine.problem.{AbstractProblem, ProblemHandler, ProblemSources}
import net.shrine.source.ConfigSource
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 {
println("Start of dashboard boot")
Log.info("Start of dashboard boot")
// 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("DashboardActors",ConfigSource.config)
catch {
case NonFatal(x) => CannotStartDashboard(x); throw x
case x: ExceptionInInitializerError => CannotStartDashboard(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 = ConfigSource.getObject("shrine.problem.problemHandler", ConfigSource.config)
handler.warmUp()
// the service actor replies to incoming HttpRequests
system.actorOf(Props[DashboardServiceActor])
}
catch {
case NonFatal(x) => CannotStartDashboard(x); throw x
case x: ExceptionInInitializerError => CannotStartDashboard(x); throw x
}
println("End of dashboard boot")
Log.info("End of dashboard boot")
}
case class CannotStartDashboard(ex:Throwable) extends AbstractProblem(ProblemSources.Dsa) {
override def summary: String = "The Dashboard could not start due to an exception."
override def description: String = s"The Dashboard could not start due to ${throwable.get}"
override def throwable = Some(ex)
}

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