Play framework - java.lang.RuntimeException: No main class detected
java, playframework, securesocial
Solution
As far as I understand it, SecureSocial-parent is just the library - it can be compiled, but cannot be run per se. You can only run the demo projects. For example, if you start `activator` in the `securesocial` directory, you can type
project javaDemo
to switch to the Java demo project and then
~run
to run it.
Problem
I am new to play framework and trying to run securesocial as in https://github.com/jaliss/securesocial Using Play 2.3, Scala 2.10.0 .sbt file is configured as ``` name := "SecureSocial-parent" version := Common.version scalaVersion := Common.scalaVersion lazy val core = project.in( file("module-code") ).enablePlugins(PlayScala) lazy val scalaDemo = project.in( file("samples/scala/demo") ).enablePlugins(PlayScala).dependsOn(core) lazy val javaDemo = project.in( file("samples/java/demo") ).enablePlugins(PlayJava).dependsOn(core) lazy val root = project.in( file(".") ).aggregate(core, scalaDemo, javaDemo) .settings( aggregate in update := false ) ``` But getting below error ``` ~\securesocial-master>activator run [info] Loading project definition from ~\securesocial-master\project [info] Set current project to SecureSocial-parent (in build file:~/securesocial-master/) java.lang.RuntimeException: No main class detected. at scala.sys.package$.error(package.scala:27) [trace] Stack trace suppressed: run last securesocial-master/compile:run for the full output. [error] (securesocial-master/compile:run) No main class detected. ``` The project compiled successfully with many warnings on deprecated API Any pointer will be useful on how to resolve the no main class error