Update README for rails5

.gitignore

@@ -21,3 +21,4 @@ tmp
 *.a
 mkmf.log
 .ruby-version
+*.log

.travis.yml

@@ -1,6 +1,6 @@
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1
+  - 2.3.1
+before_install:
+  - gem update bundler
 gemfile:
   - Gemfile

README.md

@@ -24,7 +24,33 @@ $ bundle
 
 This gem provides a rack middleware `ActiveRecord::ConnectionAdapters::RefreshConnectionManagement` which disconnects all connections in each rack request, which results in refreshing all connections in each rack request. 
 
-### Rails
+### Rails 5
+
+NOTE: activerecord-refresh_connection does not work with puma, and webrick server in rails 5.
+
+```ruby
+# config/application.rb
+class Application < Rails::Application
+  config.middleware.insert_before ActionDispatch::Executor,
+    "ActiveRecord::ConnectionAdapters::RefreshConnectionManagement"
+
+  ## If you would like to clear connections after 5 requests:
+  # config.middleware.insert_before ActionDispatch::Executor,
+  #   "ActiveRecord::ConnectionAdapters::RefreshConnectionManagement", max_requests: 5
+end
+```
+
+Middleware check. 
+
+```bash
+bundle exec rake middleware
+```
+
+Use unicorn server to run your application.
+
+### Rails 4
+
+NOTE: activerecord-refresh_connection does not work with puma server in rails 4.
 
 Swap the default rails ConnectionManagement.
 
@@ -69,6 +95,18 @@ run App
 
 See [CHANGELOG.md](CHANGELOG.md) for details.
 
+## Development
+
+Run example
+
+```
+cd example/xxxx
+bundle
+bundle exec foreman start
+```
+
+Watch `show processlist` in mysql console to see connections are killed on each access.
+
 ## Contributing
 
 1. Fork it

example/example/.gitignore

@@ -0,0 +1,21 @@
+# See https://help.github.com/articles/ignoring-files for more about ignoring files.
+#
+# If you find yourself ignoring temporary files generated by your text editor
+# or operating system, you probably want to add a global ignore instead:
+#   git config --global core.excludesfile '~/.gitignore_global'
+
+# Ignore bundler config.
+/.bundle
+
+# Ignore the default SQLite database.
+/db/*.sqlite3
+/db/*.sqlite3-journal
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# Ignore Byebug command history file.
+.byebug_history

example/example/Gemfile

@@ -0,0 +1,51 @@
+source 'https://rubygems.org'
+
+gem 'activerecord-refresh_connection', path: '../..'
+# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
+gem 'rails', '~> 5.0.0'
+# Use sqlite3 as the database for Active Record
+# gem 'sqlite3'
+gem 'mysql2'
+# Use Puma as the app server
+# gem 'puma', '~> 3.0'
+gem 'unicorn'
+gem 'foreman'
+# Use SCSS for stylesheets
+gem 'sass-rails', '~> 5.0'
+# Use Uglifier as compressor for JavaScript assets
+gem 'uglifier', '>= 1.3.0'
+# Use CoffeeScript for .coffee assets and views
+gem 'coffee-rails', '~> 4.2'
+# See https://github.com/rails/execjs#readme for more supported runtimes
+# gem 'therubyracer', platforms: :ruby
+
+# Use jquery as the JavaScript library
+gem 'jquery-rails'
+# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
+gem 'turbolinks', '~> 5'
+# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
+gem 'jbuilder', '~> 2.5'
+# Use Redis adapter to run Action Cable in production
+# gem 'redis', '~> 3.0'
+# Use ActiveModel has_secure_password
+# gem 'bcrypt', '~> 3.1.7'
+
+# Use Capistrano for deployment
+# gem 'capistrano-rails', group: :development
+
+group :development, :test do
+  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'byebug', platform: :mri
+end
+
+group :development do
+  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
+  gem 'web-console'
+  gem 'listen', '~> 3.0.5'
+  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
+  gem 'spring'
+  gem 'spring-watcher-listen', '~> 2.0.0'
+end
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

example/example/Procfile

@@ -0,0 +1 @@
+web: bundle exec unicorn -c config/unicorn.rb

example/example/README.md

@@ -0,0 +1,24 @@
+# README
+
+This README would normally document whatever steps are necessary to get the
+application up and running.
+
+Things you may want to cover:
+
+* Ruby version
+
+* System dependencies
+
+* Configuration
+
+* Database creation
+
+* Database initialization
+
+* How to run the test suite
+
+* Services (job queues, cache servers, search engines, etc.)
+
+* Deployment instructions
+
+* ...

example/example/Rakefile

@@ -0,0 +1,6 @@
+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require_relative 'config/application'
+
+Rails.application.load_tasks

example/example/app/assets/config/manifest.js

@@ -0,0 +1,3 @@
+//= link_tree ../images
+//= link_directory ../javascripts .js
+//= link_directory ../stylesheets .css

example/example/app/assets/javascripts/application.js

@@ -0,0 +1,16 @@
+// This is a manifest file that'll be compiled into application.js, which will include all the files
+// listed below.
+//
+// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
+// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
+//
+// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
+// compiled file. JavaScript code in this file should be added after the last require_* statement.
+//
+// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
+// about supported directives.
+//
+//= require jquery
+//= require jquery_ujs
+//= require turbolinks
+//= require_tree .

example/example/app/assets/javascripts/cable.js

@@ -0,0 +1,13 @@
+// Action Cable provides the framework to deal with WebSockets in Rails.
+// You can generate new channels where WebSocket features live using the rails generate channel command.
+//
+//= require action_cable
+//= require_self
+//= require_tree ./channels
+
+(function() {
+  this.App || (this.App = {});
+
+  App.cable = ActionCable.createConsumer();
+
+}).call(this);

example/example/app/assets/stylesheets/application.css

@@ -0,0 +1,15 @@
+/*
+ * This is a manifest file that'll be compiled into application.css, which will include all the files
+ * listed below.
+ *
+ * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
+ * or any plugin's vendor/assets/stylesheets directory can be referenced here using a relative path.
+ *
+ * You're free to add application-wide styles to this file and they'll appear at the bottom of the
+ * compiled file so the styles you add here take precedence over styles defined in any other CSS/SCSS
+ * files in this directory. Styles in this file should be added after the last require_* statement.
+ * It is generally better to create a new file per style scope.
+ *
+ *= require_tree .
+ *= require_self
+ */

example/example/app/assets/stylesheets/scaffolds.scss

@@ -0,0 +1,89 @@
+body {
+  background-color: #fff;
+  color: #333;
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+  margin: 33px;
+}
+
+p, ol, ul, td {
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+  margin: 33px;
+}
+
+pre {
+  background-color: #eee;
+  padding: 10px;
+  font-size: 11px;
+}
+
+a {
+  color: #000;
+
+  &:visited {
+    color: #666;
+  }
+
+  &:hover {
+    color: #fff;
+    background-color: #000;
+  }
+}
+
+th {
+  padding-bottom: 5px;
+}
+
+td {
+  padding-bottom: 7px;
+  padding-left: 5px;
+  padding-right: 5px;
+}
+
+div {
+  &.field, &.actions {
+    margin-bottom: 10px;
+  }
+}
+
+#notice {
+  color: green;
+}
+
+.field_with_errors {
+  padding: 2px;
+  background-color: red;
+  display: table;
+}
+
+#error_explanation {
+  width: 450px;
+  border: 2px solid red;
+  padding: 7px;
+  padding-bottom: 0;
+  margin-bottom: 20px;
+  background-color: #f0f0f0;
+
+  h2 {
+    text-align: left;
+    font-weight: bold;
+    padding: 5px 5px 5px 15px;
+    font-size: 12px;
+    margin: -7px;
+    margin-bottom: 0;
+    background-color: #c00;
+    color: #fff;
+  }
+
+  ul li {
+    font-size: 12px;
+    list-style: square;
+  }
+}
+
+label {
+  display: block;
+}

example/example/app/channels/application_cable/channel.rb

@@ -0,0 +1,4 @@
+module ApplicationCable
+  class Channel < ActionCable::Channel::Base
+  end
+end

example/example/app/channels/application_cable/connection.rb

@@ -0,0 +1,4 @@
+module ApplicationCable
+  class Connection < ActionCable::Connection::Base
+  end
+end

example/example/app/controllers/application_controller.rb

@@ -0,0 +1,3 @@
+class ApplicationController < ActionController::Base
+  protect_from_forgery with: :exception
+end

example/example/app/jobs/application_job.rb

@@ -0,0 +1,2 @@
+class ApplicationJob < ActiveJob::Base
+end

example/example/app/mailers/application_mailer.rb

@@ -0,0 +1,4 @@
+class ApplicationMailer < ActionMailer::Base
+  default from: 'from@example.com'
+  layout 'mailer'
+end

example/example/app/models/application_record.rb

@@ -0,0 +1,3 @@
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end

example/example/app/models/article.rb

@@ -0,0 +1,2 @@
+class Article < ApplicationRecord
+end

example/example/app/models/book.rb

@@ -0,0 +1,2 @@
+class Book < ApplicationRecord
+end

example/example/app/views/articles/_form.html.erb

@@ -0,0 +1,22 @@
+<%= form_for(article) do |f| %>
+  <% if article.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(article.errors.count, "error") %> prohibited this article from being saved:</h2>
+
+      <ul>
+      <% article.errors.full_messages.each do |message| %>
+        <li><%= message %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= f.label :title %>
+    <%= f.text_field :title %>
+  </div>
+
+  <div class="actions">
+    <%= f.submit %>
+  </div>
+<% end %>

example/example/app/views/articles/edit.html.erb

@@ -0,0 +1,6 @@
+<h1>Editing Article</h1>
+
+<%= render 'form', article: @article %>
+
+<%= link_to 'Show', @article %> |
+<%= link_to 'Back', articles_path %>