Github user neykov commented on the issue:
https://github.com/apache/brooklyn-server/pull/153
Looks like it's possible to secure a script engine so it can run any 3d
party scripts, but it's language spefic, there's nothing in JSR-223 that we can
rely on.
See what it would take to secure a Rhino engine in
http://codeutopia.net/blog/2009/01/02/sandboxing-rhino-in-java/.
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