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README.md

JRuby-Rack Examples

This directory includes samples using JRuby-Rack to build Rack web applications for deployment into Java app servers.

  • All use Warbler to do so for easy of packaging.
  • Require JRuby 9.4 and a compatible JVM (Java 8 -> 25).

Building/running

For deployment into a separate webserver:

  1.  bundle
 bundle exec warble war
  2. Drop the war into a relevant Java app server running a compatible JVM version

As an executable jar within Jetty:

  1.  bundle
 bundle exec warble executable war
  2.  java -jar *.war

Demo routes

Example Component Embedded Route Deployed War Route
Rails 7 Status Page http://localhost:8080/up http://localhost:8080/rails7/up
Rails 7 Snoop Dump http://localhost:8080/snoop http://localhost:8080/rails7/snoop
Rails 7 Simple Form submission http://localhost:8080/simple_form http://localhost:8080/rails7/simple_form
Rails 7 Body Posts http://localhost:8080/body http://localhost:8080/rails7/body
Rails 7 JSP (render) http://localhost:8080/jsp/ http://localhost:8080/rails7/jsp/
Rails 7 JSP (forward to) http://localhost:8080/jsp-forward/ http://localhost:8080/rails7/jsp-forward/
Rails 7 JSP (include) http://localhost:8080/jsp-include/ http://localhost:8080/rails7/jsp-include/
Sinatra Demo Index http://localhost:8080/ http://localhost:8080/sinatra
Sinatra Info http://localhost:8080/info http://localhost:8080/sinatra/info
Sinatra Snoop Dump http://localhost:8080/env http://localhost:8080/sinatra/env
Sinatra JSP (render) http://localhost:8080/jsp/index.jsp http://localhost:8080/sinatra/jsp/index.jsp
Sinatra JSP (forward to) http://localhost:8080/jsp_forward http://localhost:8080/sinatra/jsp_forward
Sinatra JSP (include) http://localhost:8080/jsp_include http://localhost:8080/sinatra/jsp_include
Sinatra Streaming Demo http://localhost:8080/stream http://localhost:8080/sinatra/stream
Camping Demo Index http://localhost:8080/ http://localhost:8080/camping
Camping Snoop Dump http://localhost:8080/snoop http://localhost:8080/camping/snoop

Development

You can run the examples using local source for warbler or jruby-rack using env vars, e.g

export WARBLER_SRC=true JRUBY_RACK_SRC=true && bundle && bundle exec warble executable war && java -Dwarbler.debug=true -jar rails*.war
  • Warbler can run directly from source
  • jruby-rack needs to be built, since it does not define a gemspec
    • There are alternate ways to do this by replacing the jruby-rack jar within the warbled jar/war, however this is more complex and error-prone that using the gem and ensuring compatibility since warbler itself depends on the jruby-rack gem.