Re: [Jython-users] jruby inside jython

[Moore, G. <Gre...@ad...>]

Adam,=20

I'm not sure if you got any sort of response. so I'll provide what I can
so you don't feel like you've been forgotten. :-)=20

First a disclaimer, I know very little about Ruby / jRuby.=20

=20

Wrt running jruby inside Jython. I haven't heard of, or seen any
reference to any doing anything like that. Honestly in my mind it begs
the question; why would I want to do that any way? Could jython be run
from jruby....would I even want to do that?

=20

Based on the stack dump that you provided I'd say that it looks like the
error is coming from jruby, but I could be wrong. This is a pretty
esoteric question so I suspect there are very few that have even tried
it.  My best suggestion is try the ruby lists again. I know Charles
Nutter has some experience with both Jython and JRuby but I don't if
even he would have tried this.

=20

Regards,

Greg.

________________________________

From: jyt...@li...
[mailto:jyt...@li...] On Behalf Of adam
goucher
Sent: Thursday, November 15, 2007 7:41 PM
To: jyt...@li...
Subject: [Jython-users] jruby inside jython

=20

I originally sent this to the jruby list, but did not get any solutions.
Has anyone on this side of things had success running jruby inside
jython for running ruby unit tests?

________________________________

(I tried to search the archives, but it wasn't working...)
=20
I'm trying to use JRuby in Jython via the JSR-233 engine. The ruby
script is a Test::Unit::TestCase originating one and runs from the
command line using the regular ruby interpreter. When I try to run it
from it from inside my script however, things get ugly. I'm rather
confused as to why it is blowing up in the way it is, but realize that
it might be something trivial to make it work and having hit the 'spent
enough time not figuring it out' its off to the mailing list.
=20
So can anyone shed light into the origin of the backtrace or have solved
this problem a different way?
=20
Note: r.eval('puts "Hello!"') works fine, it is just when I pass in this
script that it does not work.
=20
Thanks.
=20
-adam
http://adam.goucher.ca <http://adam.goucher.ca/>=20
=20
<ruby>
require 'test/unit'
class ExampleTest < Test::Unit::TestCase
    def test_something
        p "ruby!"
    end
    def test_another
        p "again!"
    end
end
</ruby>
=20
<jython>
import javax.script.ScriptContext
import javax.script.ScriptEngine
import javax.script.ScriptEngineManager
import javax.script.ScriptException
=20
m =3D javax.script.ScriptEngineManager()
r =3D m.getEngineByName("jruby")
rs =3D open(f, "r")
y =3D r.eval(rs.read())
rs.close()
</jython>
=20
<ugliness>
Traceback (innermost last):
  File "jpythonruby.py", line 48, in ?
C:/temp/jpythonruby/jruby-1.0.2/lib/ruby/1.8/test/unit/autorunner.rb:59:
private
 method `sub' called for nil:NilClass (NoMethodError)
        from
C:/temp/jpythonruby/jruby-1.0.2/lib/ruby/1.8/test/unit.rb:2:in `call'
        from
C:/temp/jpythonruby/jruby-1.0.2/lib/ruby/1.8/test/unit/autorunner.rb:198
:in `run'
        from
C:/temp/jpythonruby/jruby-1.0.2/lib/ruby/1.8/test/unit/autorunner.rb:13:
in `run'
        from
C:/temp/jpythonruby/jruby-1.0.2/lib/ruby/1.8/test/unit.rb:278
        from <unknown>:1
        ...internal jruby stack elided...
        from org.jruby.runtime.Block.yield(Block.java:260)
        from org.jruby.runtime.Block.call(Block.java:214)
        from org.jruby.RubyProc.call(RubyProc.java:169)
        from org.jruby.RubyProc.call(RubyProc.java:148)
        from org.jruby.Ruby.tearDown(Ruby.java:1447)
        from
org.jruby.javasupport.JavaEmbedUtils.terminate(JavaEmbedUtils.java:66)
        from
com.sun.script.jruby.JRubyScriptEngine.evalNode(JRubyScriptEngine.java:3
96)
        from
com.sun.script.jruby.JRubyScriptEngine.eval(JRubyScriptEngine.java:139)
        from
javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:247)
        from sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        from
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)
        from
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
        from java.lang.reflect.Method.invoke(Method.java:597)
        from org.python.core.PyReflectedFunction.__call__(Unknown
Source)
        from org.python.core.PyMethod.__call__(Unknown Source)
        from org.python.core.PyObject.__call__(Unknown Source)
        from org.python.core.PyInstance.invoke(Unknown Source)
        from org.python.pycode._pyx0.f$0(jpythonruby.py:48)
        from org.python.pycode._pyx0.call_function(jpythonruby.py)
        from org.python.core.PyTableCode.call(Unknown Source)
        from org.python.core.PyCode.call(Unknown Source)
        from org.python.core.Py.runCode(Unknown Source)
        from org.python.core.__builtin__.execfile_flags(Unknown Source)
        from org.python.util.PythonInterpreter.execfile(Unknown Source)
        from org.python.util.jython.main(Unknown Source)
org.jruby.exceptions.RaiseException: org.jruby.exceptions.RaiseException
</ugliness>

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=20

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