Play Framework/Scala example source code file (Server.scala)

This example Play Framework source code file (Server.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Play Framework (and Scala) source code examples by using tags.

All credit for the original source code belongs to Play Framework; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Play Framework tags/keywords

api, application, applicationprovider, boolean, concurrent, core, either, failure, handler, play, play framework, requestheader, string, threaddeath, throwable, utilities

The Server.scala Play Framework example source code

/*
 * Copyright (C) 2009-2013 Typesafe Inc. <http://www.typesafe.com>
 */
package play.core.server

import scala.language.postfixOps

import play.api._
import play.core._
import play.api.mvc._

import scala.concurrent.duration._
import scala.util.{ Try, Success, Failure }
import scala.util.control.NonFatal
import scala.concurrent.Future

trait WebSocketable {
  def getHeader(header: String): String
  def check: Boolean
}

/**
 * provides generic server behaviour for Play applications
 */
trait Server {

  // First delete the default log file for a fresh start (only in Dev Mode)
  try {
    if (mode == Mode.Dev) new java.io.File(applicationProvider.path, "logs/application.log").delete()
  } catch {
    case NonFatal(_) =>
  }

  // Configure the logger for the first time
  Logger.configure(
    Map("application.home" -> applicationProvider.path.getAbsolutePath),
    mode = mode)

  val bodyParserTimeout = {
    //put in proper config
    1 second
  }

  def mode: Mode.Mode

  def getHandlerFor(request: RequestHeader): Either[Future[Result], (RequestHeader, Handler, Application)] = {

    import scala.util.control.Exception

    def sendHandler: Try[(RequestHeader, Handler, Application)] = {
      try {
        applicationProvider.get.map { application =>
          application.global.onRequestReceived(request) match {
            case (requestHeader, handler) => (requestHeader, handler, application)
          }
        }
      } catch {
        case e: ThreadDeath => throw e
        case e: VirtualMachineError => throw e
        case e: Throwable => Failure(e)
      }
    }

    def logExceptionAndGetResult(e: Throwable) = {

      Logger.error(
        """
        |
        |! %sInternal server error, for (%s) [%s] ->
        |""".stripMargin.format(e match {
          case p: PlayException => "@" + p.id + " - "
          case _ => ""
        }, request.method, request.uri),
        e)

      DefaultGlobal.onError(request, e)

    }

    Exception
      .allCatch[Option[Future[Result]]]
      .either(applicationProvider.handleWebCommand(request).map(Future.successful))
      .left.map(logExceptionAndGetResult)
      .right.flatMap(maybeResult => maybeResult.toLeft(())).right.flatMap { _ =>
        sendHandler match {
          case Failure(e) => Left(logExceptionAndGetResult(e))
          case Success(v) => Right(v)
        }
      }

  }

  def applicationProvider: ApplicationProvider

  def stop() {
    Logger.shutdown()
  }

}