Threading in Rails

rubyonrails-talk
1

Hello,

I was wondering if someone can point me how to invoke threads from an action in a controller. Basically, in an action, I want to do some tasks asynchronously for which user need not wait.

2

It isn't safe (at least not now) to create threads in Rails, but you can use something like Background Job -> http://codeforpeople.com/lib/ruby/bj/bj-1.0.1/README

3

Will look into it.

4

Does this background job maintains a queue sort of thing? If yes, then how does some tasks can be concurrently executed?

5

Background job usually runs a job at a time, which is cool as Ruby itself is almost "single threaded", but if you want a solution with concurrent job execution, you can try SkyNet -> http://skynet.rubyforge.org/

6

Check out the last two Railscasts.

I think this might be what you need.

7

I installed skynet in my rails application using $skynet_install --rails .

After this, when I try to start my server (Mongreal), it throws me following error.

=> Booting Mongrel (use ‘script/server webrick’ to force WEBrick)

=> Rails application starting on http://127.0.0.1:3005 => Call with -d to detach => Ctrl-C to shutdown server ** Starting Mongrel listening at 127.0.0.1:3005

** Starting Rails with development environment… Exiting /home/jaikishan/aptana/ plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require’: no such file to load – skynet (MissingSourceFile)

from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `new_constants_in'
from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:318:in `require'

from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496
from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'

from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `new_constants_in'

from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:318:in `require'
from /home/jaikishan/aptana/plugins/org.jruby_1.1.0.5965_RC2p2/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496

 ... 35 levels...
from /home/jaikishan/aptana/workspace/Analytics/./script/server:3
from -e:2:in `load'
from -e:2

What to do now?