Packages

•  package root

  Definition Classes

  root

•  package play

  Play framework.

  Play framework.

  Play

  http://www.playframework.com

  Definition Classes

  root

•  package api

  Contains the public API for Scala developers.

  Contains the public API for Scala developers.

  Read configuration

  val poolSize = configuration.getInt("engine.pool.size")

  Use the logger

  Logger.info("Hello!")

  Define a Plugin

  class MyPlugin(app: Application) extends Plugin

  Create adhoc applications (for testing)

  val application = Application(new File("."), this.getClass.getClassloader, None, Play.Mode.DEV)

  Definition Classes

  play

•  package libs

  Contains various APIs that are useful while developing web applications.

  Contains various APIs that are useful while developing web applications.

  Definition Classes

  api

•  package json

  Json API

  Json API

  For example:

  import play.api.libs.json._
  import play.api.libs.functional.syntax._
  
  case class User(id: Long, name: String, friends: Seq[User] = Seq.empty)
  object User {
  
    // In this format, an undefined friends property is mapped to an empty list
    implicit val format: Format[User] = (
      (__ \ "id").format[Long] and
      (__ \ "name").format[String] and
      (__ \ "friends").lazyFormatNullable(implicitly[Format[Seq[User]]])
        .inmap[Seq[User]](_ getOrElse Seq.empty, Some(_))
    )(User.apply, unlift(User.unapply))
  }
  
  object MyController extends play.api.mvc.Controller {
     def displayUserAsJson(id: String) = Action {
        Ok(Json.toJson(User(id.toLong, "myName")))
     }
  
     def saveUser(jsonString: String)= Action {
       val user = Json.parse(jsonString).as[User]
       //myDataStore.save(user)
       Ok
     }
  }

  Definition Classes

  libs

•  trait DefaultWrites extends LowPriorityWrites with EnumerationWrites

  Default Serializers.

  Default Serializers.

  Definition Classes

  json

• BigDecimalWrites
• BigIntWrites
• BigIntegerWrites
• BooleanWrites
• ByteWrites
• DefaultDateWrites
• DoubleWrites
• FloatWrites
• IntWrites
• JsValueWrites
• JsonNodeWrites
• LongWrites
• ShortWrites
• StringWrites
• TemporalFormatter
• UuidWrites

play.api.libs.json.DefaultWrites

FloatWrites