Secure Nashorn JS Execution

Question

How can I securely execute some user supplied JS code using Java8 Nashorn?

The script extends some computations for some servlet based reports. The app has many diff

Answer 1

An external sandbox library can be used if you don't want to implement your own ClassLoader & SecurityManager (that's the only way of sandboxing for now).

I've tried "The Java Sandbox" (http://blog.datenwerke.net/p/the-java-sandbox.html) although it's a bit rough around the edges, but it works.