Continuations in your ActionController actions.
Since it uses Continuations and callcc, it will only run on MRI. Sorry, no JRuby or IronRuby. Additionally, you need to set Rails’ session store to use memory. Add this line to environment.rb
config.action_controller.session_store = :memory_store
This plugin for Rails allows you to declare actions in your controllers that look like this:
def_continued :my_method render :partial => 'form_part_1' continue render :partial => 'form_part_2' continue render :partial => 'form_part_3' end
To use it, include ActsAsContinuable in your controller class
When you call continue, your action execution is paused and stored in the session to return to later. This allows you to handle multiple request/response cycles within a single action. The back button works as well as long as action execution hasn’t actually completed. The action will rewind execution to the appropriate point.
within your view, an instance variable @context_id is available. In order to call back into the action, pass @context_id back as the GET or POST parameter :context_id within your view: e.g.:
<%= link_to :action => 'my_method', :context_id => @context_id %>
Currently when you try to shut down mongrel, it waits for the backing threads stored in the session to exit. They are, of course paused, so mongrel waits a minute before killing them.
Questions, comments, and patches about/for this arm-twisting of an experiment for Rails? Contact me at firstname@lastname.name
acts_as_continuable is Copyright © 2008 Matt Freels and is released under the following license:
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