[Rails] Storing Rails controller callback data in session

http://stackoverflow.com/questions/16770090/storing-rails-controller-callback-data-in-session

The idea is:

• Perform some time consuming action in background.
• Have the results from that action be propagated back to the controller using a callback.
• Store the result in an in memory session store.
• Have the result in session be used and available from that point onward.

Controller receives the results in the callback, as expected.

# controller callback, saves result to session  # this method is executed as expected  # session id matches the one from other controller actions  def on_counter_value_calculated(context, new_value)    @counter = new_value    session[:counter] = @counter  end

However, stored session is lost in subsequent calls.

# although the same session is targeted (same id)  # the saved value is not the same  def index    @counter = session[:counter] || 0  end

I've created a small Rails project that demonstrates the issue:https://github.com/elvanja/controller_callbak_store_in_session

Any input appreciated.

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