RebelLabs post: Exploring the virtues of microservices with Play and Akka

activator.sh

activator new # create a new project
activator run # run the current project
activator shell # open the CLI shell into the project

ExampleActor.java

class ExampleActor extends AbstractActor {
  // this child will be destroyed and re-created upon restart by default
  final ActorRef other = getContext().actorOf(new Props(OtherActor.class), "childName");

  public ExampleActor() {
    receive(ReceiveBuilder
      .match(Request1.class, r -> 
        other.tell(r.getMsg(), self())
      )
      .match(Request2.class, r -> 
        other.tell(r.getMsg(), sender())
      )
      .match(Request2.class, r -> 
        pipe(ask(other, r.getMsg(), 500), context().dispatcher()).to(sender())
      )
      .build());
  }
}

WS-example.java

WSRequest complexRequest = request.setHeader("headerKey", "headerValue")
                                  .setRequestTimeout(1000)
                                  .setQueryParameter("paramKey", "paramValue");

WS-mapResponse.java

Promise<JsonNode> jsonPromise = ws.url(url).get().map(response -> {
    return response.asJson();
});