When trying to access the ThreadManager in development (using appengine-magic.core/serve), the import works but this exception is thrown:
clojure.lang.Compiler$CompilerException: java.lang.RuntimeException: Unable to find static field: createThreadForCurrentRequest in class com.google.appengine.api.ThreadManager, compiling: x
If run the exact same code via the dev_appserver.sh script, it works just fine. I guess that some part of the threading stuff is not getting initialized by appengine-magic?