From the FAQ:

  Which languages do you support?

  Takipi works at the JVM level. This means we support all languages running on the Java Virtual Machine. These include - Java, Scala, Groovy, Clojure, etc.. Click here to learn more about viewing Scala code in Takipi.
  We plan to support more software VMs such as CPython and Ruby MRI in the future.

Just FYI, most of this is a lot easier in python. You can get the full stack trace and all of the values of all of the variables when there is an exception, something that is orders of magnitude more difficult to do with Java/Scala.

You'd have to be a bit creative to get the "full variable value history" stuff working, but it would probably be possible with some hacking on the setattr methods for your objects (assuming you have full control over the system)

I had a bunch of code like that for my previous (python) projects. I've really missed it now that I've moved to scala/java, so I'm pretty excited for this project.