Playframework中的Akka版本

Question

我正在尝试将一些现有代码与play框架集成.我下载了1.3.6最小的Typesafe Activator软件包.我创建了一个play-java项目并build.sbt使用以下行修改了 文件:

resolvers += "Local Maven Repository" at "file://"+Path.userHome.absolutePath+"/.m2/repository"

libraryDependencies ++= Seq(
  "com.xxx" % "messages" % "0.0.1-SNAPSHOT"
)

然后我添加了对我现有的一个类的引用Application.java.当我运行时activator run,它下载了大量的jar,包括我手动添加并成功编译代码的jar.

当它试图运行时,我收到一个错误:

$ ./activator run
[info] Loading project definition from <APP_ROOT>/project
[info] Set current project to my-proj (in build file:<APP_ROOT>)

--- (Running the application, auto-reloading is enabled) ---

java.lang.ClassNotFoundException: akka.event.slf4j.Slf4jLoggingFilter
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at akka.actor.ReflectiveDynamicAccess$$anonfun$getClassFor$1.apply(DynamicAccess.scala:67)
    at akka.actor.ReflectiveDynamicAccess$$anonfun$getClassFor$1.apply(DynamicAccess.scala:66)
    at scala.util.Try$.apply(Try.scala:192)
    at akka.actor.ReflectiveDynamicAccess.getClassFor(DynamicAccess.scala:66)
    at akka.actor.ReflectiveDynamicAccess.createInstanceFor(DynamicAccess.scala:84)
    at akka.actor.ActorSystemImpl.<init>(ActorSystem.scala:612)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:143)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:127)
    at play.api.libs.concurrent.ActorSystemProvider$.start(Akka.scala:291)
    at play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:205)
    at play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:61)
    at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
    at play.core.server.DevServerStart$.mainDev(DevServerStart.scala:60)
    at play.core.server.DevServerStart$.mainDevHttpMode(DevServerStart.scala:50)
    at play.core.server.DevServerStart.mainDevHttpMode(DevServerStart.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at play.runsupport.Reloader$.startDevMode(Reloader.scala:223)
    at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:74)
    at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:74)
    at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
    at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:53)
    at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)

看看版本号,我认为这是因为我们使用的是akka-actor 2.4.0-RC2,而激活器使用的是2.3.有没有办法让激活者使用2.4？或者我是否需要等待新版的激活剂？

我尝试添加

  "com.typesafe.akka" % "akka-actor_2.11" % "2.4.0-RC2"

to libraryDependencies,但是这引发了关于被驱逐的依赖关系和同一类没有找到错误的警告.

我不是太熟悉之间的相互作用play和activator.如果有办法通过摆脱其中一个而不添加大量额外工作来完成这项工作,那也没关系.

Answer 1

我不认为这是版本的问题.看起来像Slf4j的问题.

尝试将akka-slf4j添加到built.sbt:

 libraryDependencies += "com.typesafe.akka" %% "akka-slf4j" % "2.3.6"

更新

对于akka actor 2.4.0,你需要添加2.4.0版本的slf4j:

 libraryDependencies += "com.typesafe.akka" %% "akka-slf4j" % "2.4.0"