Bram Swenson bramswenson

Exploring `paper_trail` gem

These notes are meant to follow reading the README. Please start there.
Primary interface is the has_paper_trail class method added to ActiveRecord::Base.
Calling this method adds some associations and callbacks to the model.
These associations are to PaperTrail::Version models or its ancestors all which inherit ActiveRecord::Base. This ActiveModel::Concern module provides all the features.
Versions can be in many tables and a model may have many version types [1](https://github.com/airb

Current Updates

Clean Coders - Uncle Bob
RubyRouges
Ruby Tapas - from Avdi
Watch Me Code - JavaScript and Node
MetaCasts - Go mixed with JS Frontend Apps
Vimcasts
Build Podcast
Frontend Masters - impressive list of contributors

References

awesome python - Large list like this one

Dependencies

virtualenv - a tool to create isolated Python environments
virtualenvwrapper - virtualenv extensions
virtualenvwrapper oh-my-zsh plugin
pyenv - Simple Python version management

Amazon SQS Notes

Queue Structure

Queues are distributed
Queues are limited to 120000 in-flight messages (use more small queues instead of one large queue)
Queues may have any number of clients sending/receiving messages at once
Queues can be created with a built in delay on message visibility
Queues can be created just for dumping messages whose processing has failed

The goal of this spike is to determine the behavior of rails replication and sharding solutions, specifically when selecting against associated records. We would like to see reads distributed across slaves where not instructed to do otherwise. Like so in the Octopus api:

# contrived example that actually doesn't work in octopus 0.8.2
irb(main):002:0> Artist.first.albums.count
[Shard: slave1]  Artist Load (1.3ms)  SELECT `artists`.* FROM `artists` LIMIT 1
[Shard: slave2]   (1.1ms)  SELECT COUNT(*) FROM `albums` WHERE `albums`.`artist_id` = 1
=> 4

	#cloud-config
	bootcmd:
	- \|
	/bin/bash <<-'EOS'
	#!/bin/bash
	exec > >(tee /root/log.txt)
	exec 2>&1
	set -x
	set -e
	if [ -e /new ]; then

	# encoding: utf-8
	require 'gemoji'
	require 'benchmark'
	require 'benchmark/ips'

	task :default => :benchmark

	task :benchmark do
	regex = /([^\u0000-\uD7FF\uE000-\uFFFF])/
	replacement = "�"

	module Geoip
	def self.geocode(ip)
	Geoip::Block.geocode(ip)
	rescue Mongoid::Errors::DocumentNotFound
	false
	end


	class Block
	include Mongoid::Document

	Em.LinkView.reopen
	init: ->
	@_super()
	Em.keys(@).forEach (key) =>
	if key.substr(0, 5) == 'data-'
	@get('attributeBindings').pushObject(key)

	Host host1.example.com host2.example.com host3.example.com
	ForwardAgent yes
	IdentityFile ~/.ssh/id_rsa