So, something like this is not currently possible, but I think it would be possible to expose a set of interfaces that would make this possible. That said, why is this desirable? Is your goal to override one of the existing SE's, or something? I could imagine reworking things so that anyone can register an arbitrary SE, and then we can implement the current SE's in terms of that interface. That said, I'm not sure of a compelling reason to do this, and would love a use case.
I worked on the JRuby implementation and reviewed the Groovy one and think that we could be doing a lot more with scripting languages, so you have my attention. 2013/1/21 Connor Woodson <cwoodson....@gmail.com> > I want to write a custom scripting engine and I would like to not have to > modify the enum in ScriptingEngine.java to get it to work both in the > 'register' command for UDFs, but also for embedded scripts. From what I can > tell, the former is possible by passing in a FQCN to the register command > instead of one of the keywords; however, I can't tell if it is possible to > get Pig to run my scripting engine when I pass it a non-pig file (e.g. you > pass it a .py file and it runs the jython scripting engine). So is this > second use possible, or (for now) can custom SE's only be used for UDFs? > > (I'll admit here that I don't understand what I meant in the end of my > previous email; feel free to ignore it). > > Thanks, > > - Connor > > > On Mon, Jan 21, 2013 at 5:04 PM, Jonathan Coveney <jcove...@gmail.com > >wrote: > > > Can you describe at a higher level what you have in mind? > > > > > > 2013/1/21 Connor Woodson <cwoodson....@gmail.com> > > > > > Is there a way to get Pig to use your custom scripting engine without > > > having to modify ScriptingEngine.java and placing it in the enum? It > > looks > > > like it's possible with enums, but what about for embedding pig? (as in > > how > > > Pig can run python scripts). > > > > > > - Connor > > > > > > > > > On Mon, Jan 21, 2013 at 1:59 PM, Daniel Dai <da...@hortonworks.com> > > wrote: > > > > > > > Pig currently support jython, jruby, javascript and groovy. If you > > > > need to write other scripting engine, extend ScriptEngine. > > > > > > > > Here are some references: > > > > 1. > > > > > > > > > > http://www.slideshare.net/daijy/pig-programming-is-more-fun-new-features-in-pig > > > > (pp 24, 25) > > > > 2. Groovy UDF: https://issues.apache.org/jira/browse/PIG-2763 > > > > 3. JRuby UDF: https://issues.apache.org/jira/browse/PIG-2317 > > > > 4. Javascript UDF: https://issues.apache.org/jira/browse/PIG-1794 > > > > > > > > Thanks, > > > > Daniel > > > > > > > > On Fri, Jan 18, 2013 at 6:42 PM, Connor Woodson < > > cwoodson....@gmail.com> > > > > wrote: > > > > > Is there any support for a custom scripting engine, to allow UDFs > to > > be > > > > > written in a different language / embed pig in another language? > > > > > > > > > > - Connor > > > > > > > > > >
