Skinny Micro on GAE

app.scala

package example

import scala.concurrent._
import skinny.micro._

object App extends AsyncWebApp {

  error {
    case e =>
      logger.error(e.getMessage, e)
      throw e // re-throwing the exception keeps the response as status 500
  }

  get("/echo") { implicit ctx =>
    params.get("message") match {
      case Some(msg) => msg
      case _ => ""
    }
  }
}

appengine-web.xml

<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
  <application>{your own application id here}</application><!-- unused for Cloud SDK based tooling -->
  <version>alpha-001</version><!-- unused for Cloud SDK based tooling -->
  <runtime>java8</runtime>
  <threadsafe>true</threadsafe>
</appengine-web-app>

Bootstrap.scala

import javax.servlet._
import skinny.micro._

class Bootstrap extends LifeCycle {
  override def init(ctx: ServletContext) {
    example.App.mount(ctx)
  }
}

build.properties

sbt.version=0.13.15

build.sbt

lazy val root = (project in file("."))
  .settings(
    organization := "org.skinny-framework",
    name := "skinny-micro-usage-example",
    version := "0.1",
    scalaVersion := "2.12.2",
    libraryDependencies ++= Seq(
      "org.skinny-framework" %% "skinny-micro"         % skinnyMicroVersion % Compile,
      "org.skinny-framework" %% "skinny-micro-jackson" % skinnyMicroVersion % Compile,
      "org.skinny-framework" %% "skinny-micro-scalate" % skinnyMicroVersion % Compile,
      "ch.qos.logback"       %  "logback-classic"      % "1.2.3"            % Compile,
      "javax.servlet"        %  "javax.servlet-api"    % "3.1.0"            % "container;provided;test",
      "org.mortbay.jetty"    %  "jetty"                % "6.1.22"           % "container"
    ),
    scalacOptions ++= Seq("-unchecked", "-deprecation", "-feature")
  )
  .enablePlugins(AppenginePlugin)

lazy val skinnyMicroVersion = "1.2.+"

plugins.sbt

scalacOptions ++= Seq("-unchecked", "-deprecation", "-feature")
addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-RC6")
addSbtPlugin("com.eed3si9n" % "sbt-appengine" % "0.7.0")

tree

├── build.sbt
├── project
│   ├── build.properties
│   └── plugins.sbt
├── src
│   └── main
│       ├── scala
│       │   ├── Bootstrap.scala
│       │   └── app.scala
│       └── webapp
│           └── WEB-INF
│               ├── appengine-web.xml
│               └── web.xml
└── target

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <listener>
        <listener-class>skinny.micro.SkinnyListener</listener-class>
    </listener>
</web-app>