A buildpack to fast and easy use JRuby on Heroku. Just create a Heroku app like this:
heroku create -s cedar --buildpack https://github.com/jruby/heroku-buildpack-jruby.git
web: bin/trinidad -t -r -p $PORT -e $RACK_ENV
Note: You do normally not want to use
bundle exec with JRuby. Use the binstubs (in
bin/) instead, and put
require 'bundler/setup' before any other
Current JRuby version: 1.7.0preview1
For now only supports 1.9 mode, open an issue if you need 1.8 mode.
Example application: github.com/carlhoerberg/heroku-jruby-example
To get the assets precompiled during slug compilation take the following actions:
Gemfile(and then run
config.assets.initialize_on_precompile = falseto
- (Optional) Replace
config.assets.js_compressor = :closureto
config/environments/production.rb, to get faster compile times.
To get Heroku to pick up Rails logs you have to add the following to
STDOUT.sync = true config.logger = Logger.new(STDOUT)
Recommended web servers are:
- Trinidad - A wrapper around Tomcat
- Mizuno - A wrapper around Jetty
- Puma - A server written in Ruby, wraps the Ragel parser (from Mongrel)
A comparison can be found here: carlhoerberg.github.com/blog/2012/03/31/jruby-application-server-benchmarks/
To get the real benefits of JRuby you should enable multithreading, both in the application server of choice as well as in Rails.
--threadsafe flag as a command line argument to Trinidad.
web: bin/trinidad --threadsafe --rackup -p $PORT -e $RACK_ENV
Copyright (C) 2012 by Carl Hörberg
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.