Error injecting constructor, java.lang.ClassCastException: Play 2.5.4 - Scala

Question

I'm trying to create a log filter, base on Play documentation but i can't figure out what is going on.

I got thios error message :

Unexpected exception ProvisionException: Unable to provision, see the following errors:

1) Error injecting constructor, java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lplay.mvc.EssentialFilter; at Filters.(Filters.scala:11) while locating Filters while locating play.http.HttpFilters for parameter 0 at play.api.http.JavaHttpFiltersAdapter.(HttpFilters.scala:63)
while locating play.api.http.JavaHttpFiltersAdapter while locating play.api.http.HttpFilters for parameter 3 at play.api.http.JavaCompatibleHttpRequestHandler.(HttpRequestHandler.scala:200) while locating play.api.http.JavaCompatibleHttpRequestHandler while locating play.api.http.HttpRequestHandler for parameter 4 at play.api.DefaultApplication.(Application.scala:221) at play.api.DefaultApplication.class(Application.scala:221) while locating play.api.DefaultApplication while locating play.api.Application

1 error

But my LoggingFilter extends EssentialFilter (I copied the documentation code). Do I need to bind something for Guice ?

Here my built.sbt:

    name := """abc"""

version := "1.0-SNAPSHOT"

lazy val root = (project in file(".")).enablePlugins(PlayScala)

scalaVersion := "2.11.8"

libraryDependencies ++= Seq(
  jdbc,
  cache,
  ws,
  filters,
  "org.scalatestplus.play" %% "scalatestplus-play" % "1.5.1" % Test,
  "org.webjars" %% "webjars-play" % "2.5.0",
  "org.webjars" % "react" % "0.13.1"
)

resolvers += "scalaz-bintray" at "http://dl.bintray.com/scalaz/releases"

routesGenerator := InjectedRoutesGenerator

Here my plugins.sbt :

// The Typesafe repository
resolvers += "Typesafe repository" at "https://repo.typesafe.com/typesafe/releases/"

// Eclpise Plugin
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")

// The Play plugin
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.5.4")

// web plugins

addSbtPlugin("com.typesafe.sbt" % "sbt-coffeescript" % "1.0.0")

addSbtPlugin("com.typesafe.sbt" % "sbt-less" % "1.1.0")

addSbtPlugin("com.typesafe.sbt" % "sbt-jshint" % "1.0.3")

addSbtPlugin("com.typesafe.sbt" % "sbt-rjs" % "1.0.7")

addSbtPlugin("com.typesafe.sbt" % "sbt-digest" % "1.1.0")

addSbtPlugin("com.typesafe.sbt" % "sbt-mocha" % "1.1.0")

addSbtPlugin("org.irundaia.sbt" % "sbt-sassify" % "1.4.2")

// transform JSX assets to js
addSbtPlugin("com.github.ddispaltro" % "sbt-reactjs" % "0.5.0")

Answer 1

It looks like this is a bug in the DefaultHttpFilters class's constructor. The error is present in 2.5.4 and will be fixed in the 2.5.5 milestone which is not yet available and does not have a due date. I would like a workaround for this as well.

Url to the issue: https://github.com/playframework/playframework/pull/6238

Answer 2

I don't know if this will help any of you with this problem. But I did get my CORSFilter to work. (Play 2.5.4)

import com.google.inject.Inject;
import play.http.HttpFilters;
import play.mvc.EssentialAction;
import play.mvc.EssentialFilter;
import play.filters.cors.CORSFilter;

public class MyFilters extends EssentialFilter implements HttpFilters {

    @Inject
    private CORSFilter corsFilter;


    @Override
    public EssentialAction apply(EssentialAction next) {
        return corsFilter.asJava().apply(next);
    }

    @Override
    public EssentialFilter[] filters() {
        EssentialFilter[] result = new EssentialFilter[1];
        result[0] = this;

        return result;
    }
}

Also added this into the application.conf

play.filters.cors{
# allow all paths
  pathPrefixes = ["/"]
  # allow all origins
  allowedOrigins = null
  allowedHttpMethods = ["GET", "POST", "PUT", "DELETE"]
  # allow all headers
  allowedHttpHeaders = null
}