JRuby allows access to your Java methods and runs in the same JVM.
Have a look at it and run your RoR application using JRuby.   No need
for IPC / XML.

http://wiki.jruby.org/wiki/Calling_Java_from_JRuby


On May 28, 7:52 am, Ritvvij <[email protected]> wrote:
> Hello everyone,
>
> We have an existing application in core java. We want to know extend
> the application to be accessible over the Internet. We were thinking
> of using Ruby on Rails to develop the front end for the application.
> The Java Server and Ruby on Rails application will communicate via
> java APIs which transfer the object in format of Xmls.
>
> How is the application structure?
> Ruby on Rails based application > Java server > Database
>
> Questions:
> 1. Is it good to redevelop the whole application into ROR from
> scratch? or the approach suggested above is worth while using?
> 2. Any performance concerns?
>
> Please advise
>
> Thanks in advance
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