D-system

---
AWSTemplateFormatVersion: 2010-09-09
Description: >-
  Configures CloudWatch logs stream and Kinesis Data Firehose to
  send logs to AppSignal from an existing CloudWatch log group.

  It must be deployed in the same region and same account as the CloudWatch log group.

  Implements all the steps from AppSignal documentation all at once:
  https://docs.appsignal.com/logging/platforms/cloudwatch.html

D-system

# docker stop mysql_5.7
# docker run -p 3306:3306 -e MYSQL_ALLOW_EMPTY_PASSWORD=true -e MYSQL_DATABASE=circle_test -e MYSQL_HOST=127.0.0.1 -e MYSQL_USER=root  --shm-size 2G --name mysql_5.7 circleci/mysql:5.7-ram
docker restart mysql_5.7

D-system

[user]
  name = Thomas Brennetot
  email = [email protected]
[core]
  editor = code --wait
[commit]
  verbose = true
[diff]
  tool = vscode
[difftool "vscode"]

D-system

---
BUNDLE_BUILD__LIBXML-RUBY: "--use-system-libraries=true --with-xml2-include=/usr/local/opt/libxml2/include/libxml2/"
BUNDLE_BUILD__MYSQL2: "--use-system-libraries=true --with-mysql-include=/usr/local/opt/mysql/include/mysql/"

D-system

class IsinCodeValidator
  ISIN_FORMAT = '^[A-Z]{2}[A-Z0-9]{9}[0-9]$'.freeze
  ISIN_REGEX = Regexp.new(ISIN_FORMAT).freeze
  LETTER_TO_CODE_VALUE = 55 # Ascii code for 'A' == 65 && 'A' == 10 in isin calculation cod

  def self.valid?(str)
    return false if str.nil? || !str.match?(ISIN_REGEX)

    proc_isin = str.split(//)
    key = proc_isin.pop.to_i

D-system

## To create a new project: `rails new MY_APP -m __FILE__`
## To run on existing projects: `bin/rails app:template LOCATION=__FILE__`

##
# Generate Gemfile.lock
##
bundle install

git add: '.'
git commit: %Q{ -m 'Initial commit: Rails vanilla' }

D-system

exceptions = []
ObjectSpace.each_object(Class) do |k|
  exceptions << k if k.ancestors.include?(Exception)
end
puts exceptions.sort { |a,b| a.to_s <=> b.to_s }.join("\n")

D-system

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

D-system

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

D-system

  def expires_now
    # override default method due to some browsers cases (http://stackoverflow.com/a/18516720/856151)
    response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate' # HTTP 1.1.
    response.headers['Pragma'] = 'no-cache' # HTTP 1.0.
    response.headers['Expires'] = '0' # Proxies.
  end