ashleyconnor

defmodule SocketPlayground do
  def listen(port) do
    listen(port, &handler/1)
  end
  
  def listen(port, handler) do
    IO.puts "listen"
    Socket.TCP.listen!(port, packet: :line)
    |> accept(handler)
  end

ashleyconnor

#!/usr/bin/python

# Equivalent of "tail -f" as a webpage using websocket
# Usage: webtail.py PORT FILENAME
# Tested with tornado 2.1

# Thanks to Thomas Pelletier for it's great introduction to tornado+websocket
# http://thomas.pelletier.im/2010/08/websocket-tornado-redis/

import tornado.httpserver

ashleyconnor

# This is a skeleton for testing models including examples of validations, callbacks,
# scopes, instance & class methods, associations, and more.
# Pick and choose what you want, as all models don't NEED to be tested at this depth.
#
# I'm always eager to hear new tips & suggestions as I'm still new to testing,
# so if you have any, please share!
#
# @kyletcarlson
#
# This skeleton also assumes you're using the following gems: 

ashleyconnor

# unicorn

description "unicorn ruby app server"

start on (local-filesystems and net-device-up IFACE=lo and runlevel [2345])
stop on runlevel [!2345]

env WORKDIR=/data
env PIDFILE=/data/tmp/pids/unicorn.pid
env CFGFILE=/data/config/unicorn.rb

ashleyconnor

class Article
  with_options on: :view do |on_view|
    on_view.validate :has_been_published
    on_view.validate :is_not_spam
  end

  def viewable?
    valid? :view
  end

ashleyconnor

#!/bin/sh
set -e
# Example init script, this can be used with nginx, too,
# since nginx and unicorn accept the same signals

# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/path/to/your/app/current
PID=$APP_ROOT/tmp/pids/unicorn.pid
ENVIRONMENT=production

ashleyconnor

package main

import (
    "fmt"
    "net/http"
    "io/ioutil"
    "os"
    )

func main() {

ashleyconnor

  # Use: it { should accept_nested_attributes_for(:association_name).and_accept({valid_values => true}).but_reject({ :reject_if_nil => nil })}
  RSpec::Matchers.define :accept_nested_attributes_for do |association|
    match do |model|
      @model = model
      @nested_att_present = model.respond_to?("#{association}_attributes=".to_sym)
      if @nested_att_present && @reject
        model.send("#{association}_attributes=".to_sym,[@reject])
        @reject_success = model.send("#{association}").empty?
      end
      model.send("#{association}").clear

ashleyconnor

Zero downtime deploys with unicorn + nginx + runit + rvm + chef

Below are the actual files we use in one of our latest production applications at Agora Games to achieve zero downtime deploys with unicorn. You've probably already read the GitHub blog post on Unicorn and would like to try zero downtime deploys for your application. I hope these files and notes help. I am happy to update these files or these notes if there are comments/questions. YMMV (of course).

Other application notes:

• Our application uses MongoDB, so we don't have database migrations to worry about as with MySQL or postgresql. That does not mean that we won't have to worry about issues with the database with indexes being built in MongoDB or what have you.
• We use capistrano for deployment.

Salient points for each file:

ashleyconnor

# encoding: UTF-8

Capistrano::Configuration.instance(:must_exist).load do
  namespace :rails do
    desc "Open the rails console on one of the remote servers"
    task :console, :roles => :app do
      hostname = find_servers_for_task(current_task).first
      exec "ssh -l #{user} #{hostname} -t 'source ~/.profile && #{current_path}/script/rails c #{rails_env}'"
    end
  end