JRuby on mainframe

Ruby JRuby
1

Hi,

Has anyone tried or been successful in installing JRuby on the Z/OS USS?
I have the necessary binary files decompressed and now trying to get the
interpreter script work. Looks like USS does not have bash shell by
default and this script needs to be tweaked for a non-bash environment.
Any pointers will be helpful.

Thanks,
Murali

2

Hi Christian,

Thanks for the suggestion. When I execute a ruby file with the complete
jar file, I get the below error. Apparently the same error was returned
when another friend executed the jruby shell script in a bash shell
environment. Let me know if this gives a clue.

$ java -jar jruby-complete-1.7.16.1.jar hello.rb
RubyBasicObject.java:522:in getMetaClass': java.lang.NullPointerException from RubyBasicObject.java:634:in getRuntime’
from RaiseException.java:139:in <init>' from Ruby.java:3724:in newNameError’
from Ruby.java:3712:in newNameError' from Ruby.java:3701:in newNameError’
from RubyModule.java:3173:in defineConstant' from EncodingService.java:253:in defineEncodingConstant’
from EncodingService.java:246:in defineEncodingConstants' from EncodingService.java:180:in defineEncodings’
from Ruby.java:1432:in initCore' from Ruby.java:1295:in bootstrap’
from Ruby.java:1220:in init' from Ruby.java:330:in newInstance’
from Main.java:258:in internalRun' from Main.java:217:in run’
from Main.java:197:in `main’
Thanks,
Murali

christian wrote in post #1163244:

just my first thought:

unless you need to “install” jruby. the quickest way to run jruby is to
take the jruby-complete jar (http://jruby.org/download) and execute
jruby
with java -jar jruby-complete.jar

  • christian
3

Is it possible although the java executable is found when you run that
command, the java executable doesn’t know where to find the Java
runtime?
Does this OS have environment variables? If so, I’d suggest setting
JDK_HOME and JAVA_HOME to the root of your Java installation.

Here’s a very short blog article showing what this looks like on Ubuntu:

http://niklas.istenes.se/java/set-java_home-and-jdk_home-in-ubuntu-11/

  • Keith

On Tue, Nov 25, 2014 at 6:34 PM, Muralidharan S. [email protected]

4

just my first thought:

unless you need to “install” jruby. the quickest way to run jruby is to
take the jruby-complete jar (http://jruby.org/download) and execute
jruby
with java -jar jruby-complete.jar

  • christian