JQ justqyx

List of links from Designing Event-Driven Systems by Ben Stopford

Designing Event-Driven Systems book by Ben Stopford contains a lot of useful links to papers, books, documentation and definitions related to event driven design and Kafka. I just extracted them as reference for the future and added some groups to show them better.

You can read the book for free

Multiple MySQL Versions for Development

Options included below:

Using Docker docker-compose
Using Homebrew brew

Using Docker (recommended)

This gist was originally created for Homebrew before the rise of Docker, yet it may be best to avoid installing mysql via brew any longer. Instead consider adding a barebones docker-compose.yml for each project and run docker-compose up to start each project's mysql service.

Are your Ruby HTTPS API calls secure?

Let's check:

2.0.0-p481 :001 > OpenSSL::SSL::SSLContext::DEFAULT_PARAMS
 => {:ssl_version=>"SSLv23", :verify_mode=>1, :ciphers=>"ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW", :options=>-2147482625}
2.0.0-p481 :002 > rating = JSON.parse(RestClient::Resource.new("https://www.howsmyssl.com/a/check" ).get)['rating']
 => "Bad"

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

	ruby '2.7.1'

	gem 'rails', github: 'rails/rails'
	gem 'tzinfo-data', '>= 1.2016.7' # Don't rely on OSX/Linux timezone data

	# Action Text
	gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra'
	gem 'okra', github: 'basecamp/okra'

	# Drivers

	#!/bin/sh

	# PATH TO YOUR HOSTS FILE
	ETC_HOSTS=/etc/hosts

	# DEFAULT IP FOR HOSTNAME
	IP="127.0.0.1"

	# Hostname to add/remove.
	HOSTNAME=$1

	# config/deploy.rb

	require 'mina/bundler'
	require 'mina/rails'
	require 'mina/git'
	require 'mina/rvm'

	# ter_mode 这个要设置，不然在 mac 下输密码有问题
	set :term_mode, nil
	set :rvm_path, '/usr/local/rvm/bin/rvm'

	-- (p - 1) / (t + 2)^1.5
	CREATE FUNCTION SP_POINTS(P SMALLINT(5), CREATED TIMESTAMP)
	RETURNS TINYINT(3)
	RETURN (P - 1) / POW(TIMESTAMPDIFF(HOUR, CREATED, NOW()) + 2, 1.5);

	# /config/initializers/sidekiq.rb

	current_web_concurrency = Proc.new do
	web_concurrency = ENV['WEB_CONCURRENCY']
	web_concurrency \|\|= Puma.respond_to?
	(:cli_config) && Puma.cli_config.options.fetch(:max_threads)
	web_concurrency \|\| 16
	end

	local_redis_url = Proc.new do