amoslanka

sudo apt-get update
sudo apt-get install build-essential zlib1g-dev git-core curl mysql-server mysql-client 

# INSTALL RBENV
cd ~/
git clone git://github.com/sstephenson/rbenv.git .rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
exec $SHELL

amoslanka

amoslanka:struck.com amoslanka$ cap staging deploy
  * executing `staging'
    triggering start callbacks for `deploy'
  * executing `multistage:ensure'
  * executing `deploy'
  * executing `deploy:update'
 ** transaction: start
  * executing `deploy:update_code'
    updating the cached checkout on all servers
    executing locally: "git ls-remote developer@united.struckaxiom.com:/git_repos/struckaxiom/struckaxiom.com master"

amoslanka

require 'redis'

# This example creates a master-slave setup with a sentinel, then connects to
# it and sends write commands in a loop.
#
# After 30 seconds, the master dies. You will be able to see how a new master
# is elected and things continue to work as if nothing happened.
#
# To run this example:
#

amoslanka

Cache Marks

An introduction of the pattern of using cache “marks” for use in building cache keys and indicating resource state uniqueness.

A cache mark is a simple value that represents a unique state of a resource or group of resources as a whole or in a particular context. A commonly used (but not referred to as) cache mark is a resource’s updated_at timestamp. It is updated to the current time when a resource is updated allowing for cache keys that use that mark to automatically invalidate caches based on previous versions of that resource’s mark. In the case of a group of resources a mark may be used to invalidate keys whenever any member of the collection is modified or removed.

Cache marks must be stored separately from the resource itself when:

• a lookup of that mark must be performed more quickly than, for example, a database query
• the mark represents a context of the resource, such as in the context of an associated record

amoslanka

require "ostruct"

# A base Service Object module.
#
# Example usage:
#
#   class DoSomething
#     include Service
#     def call
#       puts context.foo

amoslanka

GET /syllabi/1 Using wrapper objects

{
  "type": "syllabus",
  "properties": {
    "id": 1,
    "title": "Build a Simple Website",
 "description": "Smells Like Bakin",

amoslanka

require 'rack'

module Rack
  class ApiVersion
    def initialize(app, options = {})
      @app = app
      @options = options
    end

    def call(env)