JsObject has a + method that allows you to add fields to an object, but unfortunately your jsonObject is statically typed as a JsValue, not a JsObject. You can get around this in a couple of ways. The first is to use as: scala> jsonObject.as[JsObject] + (“c” -> Json.toJson(3)) res0: play.api.libs.json.JsObject = {“a”:1,”b”:2,”c”:3} With as … Read more
I’m working on a private project which is basically a very extended version of the chatroom example and I also had startup problems with akka and the whole “decentralized” thinking. So I can tell you how I “solved” my extended chatroom: I wanted a server which could easily be deployed multiple times without much additional … Read more
The stack you choose should depend upon the needs of your application. Let’s look at Play vs. Node for their strengths: Node Real-time applications (chat, feeds) Event-driven architecture Can perform client-server duties (e.g. serve files), but not well-suited for this Database management, testing tools, etc, available as additional packages Play! Client-server applications (website, services) Share-nothing … Read more
I had a similar problem and I had to change jsonObject.getAsString() to jsonObject.toString();
After adding implicit messages parameters to views you can just add the following imports and use the old controller classes or even objects without any additional changes: import play.api.Play.current import play.api.i18n.Messages.Implicits._
If you use immutable maps, you can use the – method to create a new map without the given key: val mx = Map(“data” -> “sumi”, “rel” -> 2, “privacy” -> 0) val m = mx(“privacy”) match { case 0 => mx – “data” case _ => mx } => m: scala.collection.immutable.Map[String,Any] = Map(rel -> … Read more
Play 2.2 is out and can be added separately from rest of Play Framework. in build.sbt: resolvers += “Typesafe Repo” at “http://repo.typesafe.com/typesafe/releases/” libraryDependencies += “com.typesafe.play” %% “play-json” % “2.2.1”
You need to create a bootstrap job which will be executed by Play at application start time. @OnApplicationStart public class Bootstrap extends Job { public void doJob() { //do stuff } } Read more about how to do this in the Play Manual.
AMENDED 2015-09-22 The library play-json-extra includes the play-json-variants strategy, but also the [play-json-extensions] strategy (flat string for case objects mixed with objects for case classes no extra $variant or $type unless needed). It also provides serializers and deserializers for macramé based enums. Previous answer There is now a library called play-json-variants which allows you to … Read more
CompletionStage<T> is an interface of which CompletableFuture<T> is the only current implementing class. By looking at the javadoc for CompletionStage<T>, you’ll notice it provides methods for taking one CompletionStage<T> and transforming it into another CompletionStage<T>. However, the returned values by the CompletionStage<T> are actually themselves CompletabeFuture<T> objects. So using CompletabeFuture<T> is kind of the same … Read more