I'm looking to try out JRuby and JRuby on Rails. I'm having trouble finding information on what's difference between JRuby on Rails and Ruby on Rails. What's the differences I need to look out fo...

It seems that the idiomatic way to provide flags to JRuby in an RVM-based Rails project is to set the environmental variable JRUBY_OPTS or PROJECT_JRUBY_OPTS, the latter perhaps being done automati...

In our JRuby/Rails project, we are using the i18n gem, and support Japanese as well as English. Our config/locales.ja.yml file is in UTF-8, without any BOM. When running Rails 3.2.9 on JRuby 1.7.1...

I just spent the better part of 3 hours trying to get my Rails application logging with Log4j. I've finally got it working, but I'm not sure if what I did is correct. I tried various methods to no ...

I have a JRubyOnRails application running in Tomcat. After browsing to my application (localhost), logging in and then doing nothing, the Heap space seems to be growing continuously... Is that nor...

I couldn't get jruby to work with Rails 4 without a hack: In railties/lib/rails/engine.rb, I had to initialize Railties with const_get, otherwise def railties @railties ||= self.class.const_get(...

I have problem while coding in Jruby on Aptana framework; when I run the rails server, it throws "Invalid encoding in marshalling stream" which I don't know how to solve? It throws an error on ...

I have a Rails 3.2.2 application that I am looking to run using JRuby 1.6.7 (1.9.2 mode). I have a sample app running in MRI ruby 1.9.3 and a typical request is returning in ~40ms: Completed 200 ...

I have a rails app which is on torquebox. I am using processors to some background jobs. I have alloted 4 workers to that processor. queues: /queue/company: messaging: /queue/company: CompanyW...

I'm looking to develop a greenfield web application which will reuse a lot of Java components. To me, the obvious options for this are Grails or jRuby on Rails, but I'm having trouble finding...

I have a action in some controller that set some value in a permanent signed cookie like this: def some_action cookies.permanent.signed[:cookie_name] = "somevalue" end And in some functional...

I help to maintain a Rails website. It's running JRuby 1.5.5, Rails 2.3.10, on a Solaris Sparc machine. I have a problem related to logging. To stop our logfiles growing too large and filling the ...

I'm using JRuby 1.5.6 on Rails to build myself an application that will periodically go away and retrieve any RSS podcasts that I have subscribed too. I've chosen JRuby primarily because I'm famil...

I am trying to obtain access to Object#try in ruby. I thought that just including activesupport would do the trick, but it doesn't. irb(main):001:0> require 'rubygems' => true irb(main):002...

I am trying to implement functionality wherein an attribute, once set, cannot be changed on an ActiveRecord model. To this end, I have written the following methods: def address self[:address] en...

The background: Step 1 -> We have a box that runs unit and functional tests of an application by running it in test mode with a specific configuration. Step 2 -> Upon success of Step 1, we run inte...

I just started with JRuby on Rails and absolutely love it. I know how to use current classes within the Java API in my Rails app, but if I wanted to create a new custom class written in purely Java...

I've got a Rails application in which a small number of actions require significant computation time. Rather than going through the complexity of managing these actions as background tasks, I've fo...

We're running a small web application written JRuby on Rails running under Tomcat. We're using a Spring back-end that's shared with another production web application. Unfortunately, we keep runnin...

So the loose tolerance of Ruby to use braces sometimes and not REQUIRE them has led to alot of confusion for me as I'm trying to learn Rails and when/where to use each and why? Sometimes parameter...

is there any particular way to convert a Ruby on Rails project to a JRuby on Rails project? There now is a need to get the Rails side to talk to a Java server via RMI so was wondering how to make t...

I'm trying to add an entire folder to the JRuby 1.5 classpath for my Rails app. The JRuby Wiki suggests the following: "... add the config directory to the JRuby classpath in config/environment.rb:...