mb-dev

class ProductsController < ApplicationController
  def index
    @products = Product.all

    if params[:product_id].present?
      @product = Product.find(params[:product_id])
    end

    if params[:product_id].present? and request.xhr?
      render 'product', layout: false

mb-dev

<div class="container">
  <div class="header">
    Header - <a href="/products/">Product List</a>
  </div>
  <div id="product_details" style="display: none">
    <% if @product.present? %>
      <%= render file: 'products/product' %>
    <% end %>
  </div>
  <ul class="products" id="product_list" style="display: none">

mb-dev

<h1><%= @product.name %></h1>
<div>
  <img src="<%= @product.image_url%>"/>
</div>

mb-dev

# Model to hold the current state
# position: last scrollTop before clicking an item
# state: Can be ITEM_VIEW or PRODUCT_LIST
# productDetailsHTML: The HTML for the detail view
class window.ProductViewState extends Backbone.Model
  @PRODUCT_LIST = 'product_list'
  @ITEM_VIEW = 'item_view'

# View to manage transitions between two states
class window.ProductView extends Backbone.View

mb-dev

if result.blank?
  Rails.cache.write(name + ':refresh-thread', 0, raw: true, unless_exist: true, expires_in: 5.seconds)
  if Rails.cache.increment(name + ':refresh-thread') == 1
    # we are the first visitor
  end
end

mb-dev

def custom_write_dogpile(name, timestamp, fragment, options)
  Rails.cache.write(timestamp_key(name, timestamp), fragment)
  Rails.cache.write(name + ':last', fragment)
  Rails.cache.delete(name + ':refresh-thread')
  fragment
end

mb-dev

def custom_read_dogpile(name, timestamp, options)
  result = Rails.cache.read(timestamp_key(name, timestamp))

  if result.blank?
    Rails.cache.write(name + ':refresh-thread', 0, raw: true, unless_exist: true, expires_in: 5.seconds)
    if Rails.cache.increment(name + ':refresh-thread') == 1
      result = nil
    else
      result = Rails.cache.read(name + ':last')
    end

mb-dev

<% custom_cache custom_cache_key('product-tile', @product.id), @product.updated_at, dogpile_protection: true do %>
 <%= @product.name %>
<% end %>

mb-dev

Sample::Application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

mb-dev

Sample::Application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # Code is not reloaded between requests.
  config.cache_classes = true

  # Eager load code on boot. This eager loads most of Rails and
  # your application in memory, allowing both thread web servers
  # and those relying on copy on write to perform better.
  # Rake tasks automatically ignore this option for performance.