Qustion on rails new threading feature

rubyonrails-talk
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I am writing a library that deals with class variables. But until recently all rails requests were in their own process. Now that threading has been introduced I'm not sure how this effect class variables, so I was hoping someone can shed some light on this.

If I am threading rails and do something like:

class ApplicationController < ActionController::Base   around_filter :setting_class_var

  private     def setting_class_var       User.some_class_var = self       yield       User.some_class_var = nil     end end

My question is will this work properly while threading? I am unsure if rails does any kind of mutual exclusion. Thanks!

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You will probably need to make those variables threadlocal. Here's the first thread I found on Ruby threadlocal variables, it doesn't look like there's a native way, but it doesn't look hard:

3

    def setting_class_var       User.some_class_var = self       yield       User.some_class_var = nil     end end

My question is will this work properly while threading? I am unsure if rails does any kind of mutual exclusion. Thanks!

Yeah you'll want to use instance variables and avoid anything shared (like class variables) unless you mean it to be shared. -=R