Roberto Ostinelli ostinelli

The ConnectionAdapter defines two callbacks :checkout (connect) and :checkin (disconnect).

ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.set_callback :checkout, :after do
  raw_connection
end

Source.

If you have multiple applications on Heroku and would like to use a single Logentries account for all of them, this is how you do it. Basically, do not use add-ons, and send all drains to your account.

In your Logentries account, click on Add Log
Select Manual
In the form that appears, input the following:
- Log Name: access.log
- Select Set: new set named myapp-{environment}, for instance myapp-staging (at least, this is how I like to name my entries)
- Select the Plain TCP, UDP - logs are sent via syslog option
Click on Create Log Token

Erlang Release init.d script

If you have packaged your application into a release generated with Rebar, you might want to have the following:

The release started on system boot.
The VM monitored and restarted it if it crashes.

Use HEART

HEART is the Heartbeat Monitoring of an Erlang Runtime System. The purpose of the heart port program is to check that the Erlang runtime system it is supervising is still running, so that if the VM crashes or becomes unresponsive, it is restarted.

	require 'net/http'
	require 'json'

	class Client

	def call(method, url, path=nil, headers={}, body=nil, timeout=60)
	net_class = Object.const_get("Net::HTTP::#{constantize(method)}")

	uri = URI("#{url}#{path}")

	# add AWS credentials to ENV variables or modify the script to pass in credentials
	require 'thread'
	require 'aws-sdk'

	# settings
	region = 'my-region'
	bucket = 'my-bucket'
	prefix = 'my-prefix'
	acl = "private"
	parallel = 25

	# add this into application.rb
	initializer_file = Rails.root.join('config', 'initializers', 'my_initializer.rb')
	reloader = ActiveSupport::FileUpdateChecker.new([initializer_file]) do
	load initializer_file
	end
	ActiveSupport::Reloader.to_prepare do
	reloader.execute
	end

	{
	"ensure_newline_at_eof_on_save": true,
	"font_size": 12.0,
	"trim_trailing_white_space_on_save": true
	}

	def stub_rails_env_as(env)
	allow(Rails).to receive(:env).and_return(ActiveSupport::StringInquirer.new(env.to_s))
	end