Ashutosh Chauhan commented on PIG-928:

I did little research on the topic and it turned there is a third option for 
doing it. JSR-223[1] for "Scripting for Java" has been approved through JCP and 
now is a part of java platform in form of javax.script[2] as of java 6. It 
seems that it aims to provide a consistent api through java language itself. No 
bindings needed, no BSF all one needs is a "scripting engine". And they claim 
to have a very long list of languages supported including awk, python, ruby, 
groovy, javascript, scheme, php, smalltalk etc. 
It will be interesting to explore this since:
1) Support from java platform implies no dependencies on BSF and language 
bindings jars.
2) Possibly more performant.
3) One consistent api for all scripting languages
4) Longer list of supported languages

I am currently reading the apis and if I get something to work, will post back 

[1] http://www.jcp.org/en/jsr/detail?id=223
[2] http://java.sun.com/javase/6/docs/api/javax/script/package-summary.html
[3] https://scripting.dev.java.net/

> UDFs in scripting languages
> ---------------------------
>                 Key: PIG-928
>                 URL: https://issues.apache.org/jira/browse/PIG-928
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Alan Gates
>         Attachments: package.zip
> It should be possible to write UDFs in scripting languages such as python, 
> ruby, etc.  This frees users from needing to compile Java, generate a jar, 
> etc.  It also opens Pig to programmers who prefer scripting languages over 
> Java.

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