Lampros - Weird Bricks

Jruby 1.7.3 on FreeBSD 9.1

21 April, 2013 | Sinatra

Hi all,


Kinda torn between Jruby and Groovy, so I figured I'll write down the steps I took to get Jruby working on FreeBSD 9.1.

Prerequisites:



1. Make sure bash is installed - it looks like Jruby needs it even if you don't actually use it - while you're on it also install curl for testing with Sinatra (you can also use a browser)

pkg_add -r bash curl



1. Download jruby (17MB)

cd /tmp; wget http://jruby.org.s3.amazonaws.com/downloads/1.7.3/jruby-bin-1.7.3.tar.gz



2. Untar under /usr/local:

tar xzf jruby-bin-1.7.3.tar.gz  -C /usr/local/



3. Set Path: (C shell only)

set path=(/usr/local/jruby-1.7.3/bin $path)



4. Set the path permanently: (C Shell only)

echo 'set path=(/usr/local/jruby-1.7.3/bin $path)' >> ~/.cshrc



5. Test by going to the home dir and getting the jruby version:

cd ~ ; pwd; jruby -v



You should get:

/root
jruby 1.7.3 (1.9.3p385) 2013-02-21 dac429b on OpenJDK Client VM 1.7.0_09-b05 [FreeBSD-i386]



6. Install the Sinatra gem:

gem install sinatra --no-ri --no-rdoc



Note: Look here for what the --no-rdoc switch does

7. Try out the most basic sinatra example from: http://www.sinatrarb.com/

First change to the /root directory:

cd /root



Use your favorite editor to create a file called sinatra101.rb:

ee sinatra101.rb



Paste the following contents inside:

require 'sinatra'

get '/hi' do
  "Hello World!n"
end



8. Run it with:

jruby sinatra101.rb -o 0.0.0.0



Sinatra starting up looks like this:

[2013-04-20 17:41:04] INFO  WEBrick 1.3.1
[2013-04-20 17:41:04] INFO  ruby 1.9.3 (2013-02-21) [java]
== Sinatra/1.4.2 has taken the stage on 4567 for development with backup from WEBrick
[2013-04-20 17:41:04] INFO  WEBrick::HTTPServer#start: pid=8483740 port=4567



9. In a different window try the following:

ps aux | egrep -i 'ruby|java' | grep -v grep



You should get something like this:

root  765   0.0 11.5 670356 58172  0  I+    5:24PM 0:07.11 /usr/local/openjdk7/bin/java -Xmx500m -Xss2048k -Djffi.boot



As you can see there's no ruby process running! It runs as a Java process.

10. Test sinatra with curl:

curl 127.0.0.1:4567/hi



You should get:

Hello World!