Kind of capped collection on top of Couchbase (without fixed size)

Application.scala

package controllers

import play.api.mvc.{Controller, Action}
import org.ancelin.play2.couchbase.Couchbase

import org.ancelin.play2.couchbase.CouchbaseRWImplicits.jsObjectToDocumentWriter
import org.ancelin.play2.couchbase.CouchbaseRWImplicits.documentAsJsValuetReader
import play.api.libs.json._
import play.api.libs.EventSource

import play.api.Play.current

import play.api.libs.concurrent.Execution.Implicits.defaultContext
import java.util.UUID

object Application extends Controller {

  val bucket = Couchbase.bucket("default")

  def insert(name: String) = Action.async {
    bucket.set[JsObject](UUID.randomUUID().toString, Json.obj(
      "index" -> System.currentTimeMillis(),
      "name" -> name
    )).map(_ => Ok("done"))
  }

  def capped = Action {
    Ok.feed(
      bucket.cappedQuery[JsValue](Couchbase.docName("capped"), "by_index", {e => (e \ "index").as[Long]}) &> EventSource()
    ).as("text/event-stream")
  }
}

routes

# Routes
# This file defines all application routes (Higher priority routes first)
# ~~~~

# Home page

GET     /capped                           controllers.Application.capped
GET     /insert                           controllers.Application.insert(name)


# Map static resources from the /public folder to the /assets URL path
GET     /assets/*file               controllers.Assets.at(path="/public", file)

view.json

{
    "name":"capped",
    "views":{
        "by_index": {
            "map":"function(doc, meta) {if(doc.index) {emit(doc.index, null);}}"
        }
    }
}