Jetty7 jruby-rack embeded server

DOCS.md

https://github.com/jruby/jruby/wiki/CallingJavaFromJRuby

http://wiki.eclipse.org/Jetty/Tutorial/Embedding_Jetty
http://download.eclipse.org/jetty/stable-7/apidocs/

run.rb

# Put this in Rails.root and the specified jars in the Rails.root/jars folder
# 
#     # run
#     > jruby run.rb
#

require 'rubygems'
require 'java'
require 'jruby-rack'

# log to stdout for now
java.lang.System.setProperty(
  "org.eclipse.jetty.util.log.class", 
  "org.eclipse.jetty.util.log.StdErrLog"
)

# jetty_jars/jetty-continuation-7.4.5.v20110725.jar
# jetty_jars/jetty-http-7.4.5.v20110725.jar
# jetty_jars/jetty-io-7.4.5.v20110725.jar
# jetty_jars/jetty-security-7.4.5.v20110725.jar
# jetty_jars/jetty-server-7.4.5.v20110725.jar
# jetty_jars/jetty-servlet-7.4.5.v20110725.jar
# jetty_jars/jetty-util-7.4.5.v20110725.jar
# jetty_jars/servlet-api-2.5.jar
jars_dir = File.join(File.dirname(__FILE__), 'jetty_jars')
for jar in Dir["#{jars_dir}/*"]
  require jar
end

class HttpServer
  include_class 'org.eclipse.jetty.server.Server'
  include_class 'org.eclipse.jetty.servlet.ServletContextHandler'
  include_class 'org.eclipse.jetty.servlet.ServletHolder'
  include_class 'org.eclipse.jetty.server.nio.SelectChannelConnector'
  include_class 'org.eclipse.jetty.util.thread.QueuedThreadPool'
  include_class 'org.eclipse.jetty.servlet.DefaultServlet'

  DEFAULT_OPTIONS = {
    :port => 3000,
    :host => 'localhost',
    :root => File.join(File.dirname(__FILE__), '..'),
    :public => '/public',
    :rackup => File.join(File.dirname(__FILE__), '..', 'config.ru'),
    :min_threads => 5,
    :max_threads => 50,
    :min_runtimes => 1,
    :max_runtimes => 1
  }
  
  def run(options = DEFAULT_OPTIONS)
    @server = Server.new

    thread_pool = QueuedThreadPool.new
    thread_pool.min_threads = options[:min_threads]
    thread_pool.max_threads = options[:max_threads]
    @server.set_thread_pool(thread_pool)

    connector = SelectChannelConnector.new
    connector.setPort options[:port]
    connector.setHost options[:host]
    @server.addConnector(connector)

    context = ServletContextHandler.new(nil, "/", 
      ServletContextHandler::NO_SESSIONS|ServletContextHandler::NO_SECURITY)

    context.add_filter("org.jruby.rack.RackFilter", "/*", 0)
    context.set_resource_base(options[:root])
    context.add_event_listener(org.jruby.rack.RackServletContextListener.new)
    
    init_params = {
      'org.eclipse.jetty.servlet.Default.relativeResourceBase' => options[:public],
      'rackup' => IO.read(options[:rackup]),
      'jruby.min.runtimes' => options[:min_runtimes].to_s,
      'jruby.max.runtimes' => options[:max_runtimes].to_s
    }
    for name, value in init_params
      context.set_init_parameter(name, value)
    end
  
    context.add_servlet(ServletHolder.new(DefaultServlet.new), "/")

    @server.set_handler(context)
    puts "Listening on #{options[:host]}:#{options[:port]}"
    @server.start
    trap("SIGINT") { @server.stop and exit }

    @server.join
  end

end

server = HttpServer.new
server.run