Anderson Fernandes andersonfernandes

Introduction

This gist started with a collection of resources I was maintaining on stream data processing — also known as distributed logs, data pipelines, event sourcing, CQRS, and other names.

Over time the set of resources grew quite large and I received some interest in a more guided, opinionated path for learning about stream data processing. So I added the reading list.

Please send me feedback!

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

When creating a DEV instance of postgreSQL on heroku, heroku create an environment variable named "DATABASE_URL" that contains url, user and password. As we are in a cloud environment, your persistence.xml file should not contain any reference to a specific host, port or user/password account. It can change without any warning.

Unfortunately, this variable is not compliant with the JDBC format because HEROKU is not done just for the JAVA. So we need to translate this generic URL into a valid JDBC URL and extract user password You can found on the web a good example with Spring, but i've not found anything without it.

So here is a snippet of code that you can use in a ServletContextListener to initialize the EntityManagerFactory. (you will found it in org.mat.nounou.servlets.EntityManagerLoaderListener in this application).

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:


	# 1) Create your private key (any password will do, we remove it below)

	$ cd ~/.ssh
	$ openssl genrsa -des3 -out server.orig.key 2048


	# 2) Remove the password

	$ openssl rsa -in server.orig.key -out server.key

	function! ToggleGStatus()
	if buflisted(bufname('.git/index'))
	bd .git/index
	else
	Gstatus
	endif
	endfunction
	command ToggleGStatus :call ToggleGStatus()
	nmap <F3> :ToggleGStatus<CR>

	namespace :db do
	require "sequel"
	Sequel.extension :migration
	DB = Sequel.connect(ENV['DATABASE_URL'])

	desc "Prints current schema version"
	task :version do
	version = if DB.tables.include?(:schema_info)
	DB[:schema_info].first[:version]
	end \|\| 0

	#!/usr/bin/env ruby -w -s
	# -- coding: utf-8 --
	require 'axlsx'

	## Some documentation ##

	### Axlsx Gem ###

	# Axlsx Docs: http://rubydoc.info/gems/axlsx/frames
	# Axlsx::DataValidation: http://rubydoc.info/gems/axlsx/Axlsx/DataValidation

	# From http://garmoncheg.blogspot.com/2012/06/pretty-git-log.html
	git config --global alias.lg "log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --"