Error compiling Scalatra project

Seriously? Unsupported major.minor version 51.0 when compiling a Scalatra project? The complete error is “Caused by: java.lang.UnsupportedClassVersionError: org/eclipse/jetty/server/Handler : Unsupported major.minor version 51.0”. After some Googling I found the following statement “You are using different JDK versions to compile and run the application”. No way, that is not possible. Continue reading

Installing Scalatra on Windows

Scalatra is a micro framework for Scala. Installation does not seem to be as straight forward as adding Scalatra to the dependencies of build.sbt. It requires a number of other tools to work: Conscript and giter8. Conscript is a tool for installing and updating Scala code. giter8, which depends on conscript, allows you to check out project templates directly from Github. It’s the recommended way to generate Scalatra project skeletons. These are quick installation instructions for Scalatra on Windows. Continue reading

sbt cannot find play-json_2.11 library

Grrrr, just cloned some of my code from Github to my laptop. I initially worked on this code on my desktop. When I tried to compile it in sbt I got the following error sbt.ResolveException: unresolved dependency: com.typesafe.play#play-json_2.11;2.3.0: not found. It had been a while since I worked on the code so I was puzzled. It turns out there are problems with the Typesafe repository. As a workaround the repository needs to be added as a resolver to the build.sbt file.

resolvers += "Typesafe Maven Repository" at "http://repo.typesafe.com/typesafe/maven-releases/"

After this it compiled nicely. Sweet. Happy coding 🙂