chanan / akkaguice Goto Github PK

I'm trying to integrate AkkaGuice and Play 2.4 and I'm getting the following error from Guice -

Could not find a suitable constructor in akkaGuice.AkkaGuicePlugin. Classes must have either one (and only one) constructor annotated with @Inject or a zero-argument constructor that is not private.

I am following the example in the README.
Any idea why this is happening ?

Regards, Deyan

Hi Chanan,

just got pointed to this project on the Play Framework mailinglist and this is exactly what I was looking for!

I started integrating AkkaGuice into my existing project and immediately bumped into the exception mentioned in the subject. I'm not quite sure what's going on but I think there is a clash between "org.reflections" % "reflections" % "0.9.9-RC1" used by AkkaGuice and the version used by Play.

I downgraded from Play 2.3.6 to 2.3.4 but the issue remains. Is this a known issue or is there any workaround available (If it helps I can provide you my full config)? Thanks!

Error in custom provider, akka.actor.InvalidActorNameException: actor name [PerRequest-114326323442451120] is not unique!
at akkaGuice.AkkaGuiceModule.RegisterActors(AkkaGuiceModule.java:59)
while locating akka.actor.ActorRef annotated with @com.google.inject.name.Named(value=PerRequest)
for parameter 4 at controllers.Application.(Application.java:24)
while locating controllers.Application

Guess this is a suggestion more than an issue. Would make it clear to have a couple of changes?

• The example is a bit confusing given the number of different scenarios illustrated. Could be better to have different examples for each use case?
• What is the correct way of instantiating Actors using an specific configuration? I've grokked the code below, but not sure if it is correct.

public onStart(Application app) {
        injector = Guice.createInjector(new AkkaGuiceModule());
        GuiceExt extension = akkaGuice.GuiceExtension.GuiceProvider.createExtension(
                ActorSystem.create("customactorsystem" ConfigFactory.load().getConfig("customactorsyste-config")).systemImpl()
            );
        extension.initialize(injector);
}

Hi,

It seems that the library is compiled with Java 8 because I get the following error:

play.api.UnexpectedException: Unexpected exception[UnsupportedClassVersionError: akkaGuice/AkkaGuiceModule : Unsupported major.minor version 52.0]
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(ApplicationProvider.scala:170) ~[play_2.11-2.3.4.jar:2.3.4]
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(ApplicationProvider.scala:130) ~[play_2.11-2.3.4.jar:2.3.4]
    at scala.Option.map(Option.scala:145) ~[scala-library-2.11.1.jar:na]
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1.apply(ApplicationProvider.scala:130) ~[play_2.11-2.3.4.jar:2.3.4]
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1.apply(ApplicationProvider.scala:128) ~[play_2.11-2.3.4.jar:2.3.4]
Caused by: java.lang.UnsupportedClassVersionError: akkaGuice/AkkaGuiceModule : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.7.0_51]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800) ~[na:1.7.0_51]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.7.0_51]
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[na:1.7.0_51]
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[na:1.7.0_51]

Would it be possible to compile the library with Java 7 backward compatibility.

Using java version 1.7.0_51, I get this error when starting my Play app. Are there any specific features of this plugin and/or Guice that require higher Java versions? Should be documented somewhere at least.

java.lang.UnsupportedClassVersionError: akkaGuice/AkkaGuicePlugin : Unsupported major.minor version 52.0