Di Wen ifyouseewendy

Ubuntu 12.04, Ruby, Rails, Nginx, Unicorn and git-deploy

In the seemlingly endless search for the actual correct and easy way to deploy a Rails app, we have tried several ways. We tried out using Apache2 and running a cluster of Thin servers. With the built in threading of Puma we decided to use it with Nginx.

Server Setup

Create new server
Login to new server
- ssh root@IPaddress (you can also use the domain name if you have the DNS setup already)
- accept the RSA key

This is a proof-of-concept of a couple of concurrent data structures written in Ruby.

The implementations are heavily commented for those interested. There are benchmarks (with results) included below. The results are interesting, but, as always, take with a grain of salt.

Data structures

AtomicLinkedQueue is a lock-free queue, built on atomic CAS operations.

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

The problem

While I was configuring Ruby on Rails in a Red Hat (CentOS) with RVM I found a problem with the library libffi-devel because the package wasn't available via yum install, after search for a couple of days I found this solution.

Add rpmforge as a repository

Create a repo file in /etc/yum.repos.d/rpmforge.repo, you need to be an admin
Copy the following text.

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

Sending emails with ActionMailer and Sidekiq

Send email asynchroniously using Sidekiq.

ActionMailer

Create your mailer us usual:

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

	RSpec.configure do \|config\|
	config.before(:suite) do
	DatabaseCleaner.clean_with(:truncation)
	end

	config.before(:each) do
	DatabaseCleaner.strategy = :transaction
	end

	config.before(:each, js: true) do

	# Using these pry gems -- copy to your Gemfile
	# group :development, :test do
	# gem 'awesome_print' # pretty print ruby objects
	# gem 'pry' # Console with powerful introspection capabilities
	# gem 'pry-byebug' # Integrates pry with byebug
	# gem 'pry-doc' # Provide MRI Core documentation
	# gem 'pry-rails' # Causes rails console to open pry. `DISABLE_PRY_RAILS=1 rails c` can still open with IRB
	# gem 'pry-rescue' # Start a pry session whenever something goes wrong.
	# gem 'pry-theme' # An easy way to customize Pry colors via theme files
	# end

	Rake::Task["assets:precompile"].clear
	namespace :assets do
	task 'precompile' do
	puts "Not pre-compiling assets..."
	end
	end