创建Rails会话后启动间隔任务（用户登录）？

Question

I want to basically create a scheduled task upon the user logging in. What Rails utility, gem, etc does this? Basically the Rails server needs to alert the browser user every two minutes, based on a set of conditions. This task has to end on sessions#destroy

In Sessions Controller

def new
 @user = User.authenticate(params[:session][:email], params[:session]  [:password])
if @user 
 session[:@user_id] = @user.id
 #how do i create a scheduled task for this session? I have a #current_user Application Controller method that will find #sessions[:@user_id] and identify it as the current user.

end
end


def destroy

sessions[:@user_id] = nil
#need to end scheduled task here.

end

Answer 1

To accomplish what you want in Rails, you could use a Thread .

# create thread

my_thread = Thread.new do

  # do some junk

  # put thread to sleep for 120 seconds

  sleep(120)
end

# nuke the thread on session#destroy

my_thread.kill