Arun Gupta, Miles to go ...

Arun Gupta is a technology enthusiast, a passionate runner, and a community guy who works for Sun Microsystems.

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Thursday April 03, 2008

Agraj is a bright Sun Campus Ambassador from Delhi University (my alma mater too :). Here is a poem dedicate to him and written by one of the professors:

Under the SUN-MICROSYS SunRay
Has bloomed a Lovely Rose,
Over Joyful in Java & Solaris
He is SUN CAMPUS AMBASSADOR Agraj.
Only one request I want to make
to the SUN's shining flower,
To remain in serene silence
During my lecture hour

Quoted by Dr. P.K Hazra

Read the original post here.

Technorati: poetry campusambassador delhi

Posted by Arun Gupta in General | Comments[3]

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Merb on JRuby 1.1 RC3

This blog provides how you can get started with Merb on JRuby 1.1 RC3.

Merb is another MVC framework (just like Rails) but with a pluggable ORM, JavaScript library and Template language. Rails has built-in support for these using ActiveRecord, Script.aculo.us and ERB templates. Making it pluggable keeps the core very lightweight and still providing support for a particular feature using plugins. Another big advantage of Merb is that unlike Rails it's thread-safe.

There are already third party supports for ActiveRecord, DataMapper and Sequel ORMs. I will hopefully be able to build support for Java Persistence API ORM in Merb. Until then, here is how you install and get started with Merb on JRuby 1.1 RC3.

Install Merb on JRuby as:

Macintosh-187:jruby-1.1RC3 arungupta$ bin/jruby -S gem install merb mongrel JRuby limited openssl loaded. gem install jruby-openssl for full support. http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL Updating metadata for 339 gems from http://gems.rubyforge.org ......................................................................................................... ......................................................................................................... ......................................................................................................... ........................ complete Successfully installed abstract-1.0.0 Successfully installed erubis-2.5.0 Successfully installed json_pure-1.1.2 Successfully installed rack-0.3.0 Successfully installed hpricot-0.6-java Successfully installed mime-types-1.15 Successfully installed merb-core-0.9.2 Successfully installed merb-action-args-0.9.2 Successfully installed merb-assets-0.9.2 Successfully installed activesupport-2.0.2 Successfully installed rubigen-1.2.4 Successfully installed merb-gen-0.9.2 Successfully installed merb-haml-0.9.2 Successfully installed merb-builder-0.9.2 Successfully installed mailfactory-1.2.3 Successfully installed merb-mailer-0.9.2 Successfully installed merb-parts-0.9.2 Successfully installed merb-cache-0.9.2 Successfully installed merb-more-0.9.2 Successfully installed merb-0.9.2 Successfully installed gem_plugin-0.2.3 Successfully installed mongrel-1.1.4-java 22 gems installed Installing ri documentation for json_pure-1.1.2... Installing ri documentation for rack-0.3.0... Installing ri documentation for hpricot-0.6-java... Installing ri documentation for mime-types-1.15... Installing ri documentation for merb-core-0.9.2... Installing ri documentation for merb-action-args-0.9.2... Installing ri documentation for merb-assets-0.9.2... Installing ri documentation for activesupport-2.0.2... Installing ri documentation for rubigen-1.2.4... Installing ri documentation for merb-gen-0.9.2... Installing ri documentation for merb-haml-0.9.2... Installing ri documentation for merb-builder-0.9.2... Installing ri documentation for mailfactory-1.2.3... Installing ri documentation for merb-mailer-0.9.2... Installing ri documentation for merb-parts-0.9.2... Installing ri documentation for merb-cache-0.9.2... Installing ri documentation for gem_plugin-0.2.3... Installing ri documentation for mongrel-1.1.4-java... Installing RDoc documentation for json_pure-1.1.2... Installing RDoc documentation for rack-0.3.0... Installing RDoc documentation for hpricot-0.6-java... Installing RDoc documentation for mime-types-1.15... Installing RDoc documentation for merb-core-0.9.2... Installing RDoc documentation for merb-action-args-0.9.2... Installing RDoc documentation for merb-assets-0.9.2... Installing RDoc documentation for activesupport-2.0.2... Installing RDoc documentation for rubigen-1.2.4... Installing RDoc documentation for merb-gen-0.9.2... Installing RDoc documentation for merb-haml-0.9.2... Installing RDoc documentation for merb-builder-0.9.2... Installing RDoc documentation for mailfactory-1.2.3... Installing RDoc documentation for merb-mailer-0.9.2... Installing RDoc documentation for merb-parts-0.9.2... Installing RDoc documentation for merb-cache-0.9.2... Installing RDoc documentation for gem_plugin-0.2.3... Installing RDoc documentation for mongrel-1.1.4-java...

This is so much simpler than couple of weeks ago where all the dependencies had to be explicitly installed. Now create a sample application as:

Macintosh-187:jruby-1.1RC3 arungupta$ cd samples/
Macintosh-187:samples arungupta$ mkdir merb
Macintosh-187:samples arungupta$ cd merb/
Macintosh-187:merb arungupta$ ../../bin/jruby -S merb-gen app hello
RubiGen::Scripts::Generate
      create app
      create autotest
      create config
      create public
      create spec
      create app/controllers
      create app/helpers
      create app/views
      create app/views/exceptions
      create app/views/layout
      create config/environments
      create public/images
      create public/stylesheets
      create autotest/discover.rb
      create autotest/merb.rb
      create autotest/merb_rspec.rb
      create config/rack.rb
      create config/router.rb
      create config/init.rb
      create public/merb.fcgi
      create spec/spec.opts
      create spec/spec_helper.rb
      create app/controllers/application.rb
      create app/controllers/exceptions.rb
      create app/helpers/global_helpers.rb
      create app/views/exceptions/internal_server_error.html.erb
      create app/views/exceptions/not_acceptable.html.erb
      create app/views/exceptions/not_found.html.erb
      create app/views/layout/application.html.erb
      create config/environments/development.rb
      create config/environments/production.rb
      create config/environments/rake.rb
      create config/environments/test.rb
      create public/images/merb.jpg
      create public/stylesheets/master.css
      create /Rakefile

The top-level directory looks like:

Macintosh-187:hello arungupta$ ls -la
total 8
drwxr-xr-x 8 arungupta arungupta   272 Apr 1 22:20 .
drwxr-xr-x 3 arungupta arungupta   102 Apr 1 22:20 ..
-rw-r--r-- 1 arungupta arungupta 3334 Apr 1 22:20 Rakefile
drwxr-xr-x 5 arungupta arungupta   170 Apr 1 22:20 app
drwxr-xr-x 5 arungupta arungupta   170 Apr 1 22:20 autotest
drwxr-xr-x 6 arungupta arungupta   204 Apr 1 22:20 config
drwxr-xr-x 5 arungupta arungupta   170 Apr 1 22:20 public
drwxr-xr-x 4 arungupta arungupta   136 Apr 1 22:20 spec

And finally start the app as:

Macintosh-187:hello arungupta$ ../../../bin/jruby -S merb
JRuby limited openssl loaded. gem install jruby-openssl for full support.
http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
~ Loaded DEVELOPMENT Environment...
~ Compiling routes...
~ Using 'share-nothing' cookie sessions (4kb limit per client)
~ Using Mongrel adapter

And the default app is hosted at "http://localhost:4000/" and shown in the browser as: