TOTD #7: Switch between JRuby and CRuby interpreter in NetBeans 6

September 7, 2007

TOTD #7: Switch between JRuby and CRuby interpreter in NetBeans 6

Filed under: netbeans, totd, web2.0 — arungupta @ 2:41 pm

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The NetBeans 6 IDE comes pre-configured with JRuby interpreter. This TOTD explains how the JRuby interpreter can be swapped with a C-based Ruby interpreter and vice versa.

Verify the JRuby interpreter
1. Create a Rails Hello World using NetBeans 6 IDE.
2. Expand "Views", "say", and open "hello.rhtml".
3. Right-click in the "hello.rhtml" window and select "Run File" (Shift+F6 is the default shortcut). This starts the WEBrick container and displays "http://localhost:3000/say/hello". It shows the following in the output window:
  => Booting WEBrick... => Rails application started on http://0.0.0.0:3000 => Ctrl-C to shutdown server; call with --help for options [2007-09-07 13:40:29] INFO WEBrick 1.3.1 [2007-09-07 13:40:29] INFO ruby 1.8.5 (2007-09-06) [java] [2007-09-07 13:40:29] INFO WEBrick::HTTPServer#start: pid=6336176 port=3000 127.0.0.1 - - [07/Sep/2007:13:40:33 PDT] "GET /say/hello HTTP/1.1" 200 83 - -> /say/hello
Switch to C-based Ruby interpreter
1. Download and install C-based Ruby interpreter (say RUBY_HOME).
2. Install Rails gem by giving the following command in RUBY_HOME\bin directory:
  ruby -S gem install rails -y --no-rdoc
3. In the NetBeans IDE "Tools" menu, select "Options", "Ruby", and change the value of "Ruby Interpreter" from
  
  to
4. Stop the already running WEBrick server by clicking on the "x" in the bottom right corner of the IDE.
5. Right-click in the "hello.rhtml" window and select "Run File" (Shift+F6 is the default shortcut). This starts the WEBrick container using the C-based Ruby interpreter and displays "http://localhost:3000/say/hello". It shows the following in the output window:
  => Booting WEBrick... [2007-09-07 14:13:54] INFO WEBrick 1.3.1 => Rails application started on http://0.0.0.0:3000 => Ctrl-C to shutdown server; call with --help for options [2007-09-07 14:13:54] INFO ruby 1.8.6 (2007-03-13) [i386-mswin32] [2007-09-07 14:13:54] INFO WEBrick::HTTPServer#start: pid=3900 port=3000 127.0.0.1 - - [07/Sep/2007:14:13:56 Pacific Daylight Time] "GET /say/hello HTTP/1.1" 200 83 - -> /say/hello 127.0.0.1 - - [07/Sep/2007:14:14:20 Pacific Daylight Time] "GET /say/hello HTTP/1.1" 200 83 - -> /say/hello

Of course, you can switch back to the JRuby interpreter using the same mechanism.

Please leave suggestions on other TOTD that you’d like to see. A complete archive is available here.

Technorati: totd rubyonrails jruby ruby netbeans

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Comments (10)

10 Comments »

Wow, Arun, when you answer questions, you *really* answer questions! Many thanks! Glen

Comment by Glen — September 7, 2007 @ 4:20 pm
Glad you liked it

Comment by Arun Gupta — September 7, 2007 @ 5:11 pm
Congratulations! I have another problem, when I run the IRB shell by Window->Other->Ruby Shell(IRB), its call the JRuby anyway. How can I change to ruby c-based?

Comment by Paulo Canedo — September 13, 2007 @ 9:13 am
Thanks for your help!

Comment by Vitaliy — September 21, 2007 @ 6:25 am
when i migrate the model database into the current version(right click on project->select migrate database->To current version) that time the following error will come how i can solve the problem please give me the solution

Comment by Tamil — September 28, 2007 @ 8:58 pm
When i migrate the model database into the current version(Right click on project->select migrate database->To current version) that time the following error has occured
(in C:/Documents and Settings/tjothiramalingam/My Documents/NetBeansProjects/RailsApplication3)
rake aborted!
org.jvyamlb.ParserException: ParserException while scanning a block mapping we had this expected <block end>, but found org.jvyamlb.tokens.ScalarToken

(See full trace by running task with –trace)
Click here to re-run task with tracing enabled

how i can solve the problem

Comment by tamil — September 28, 2007 @ 9:05 pm
Paulo, your question is answered at:

http://ruby.netbeans.org/servlets/ReadMsg?list=users&msgNo=200

Tamil, your question is answered at:

http://ruby.netbeans.org/servlets/ReadMsg?list=users&msgNo=195

Comment by Arun Gupta — October 2, 2007 @ 6:29 pm
you cannot get more clear than that

Comment by Forex — October 10, 2008 @ 7:38 am
Congratulations! I have another problem, when I run the IRB shell by Window->Other->Ruby Shell(IRB), its call the JRuby anyway. How can I change to ruby c-based?

Comment by BATTERY — November 26, 2008 @ 8:35 pm
BATTERY, please post your question to .

Comment by Arun Gupta — November 27, 2008 @ 8:39 am