# Puma can serve each request in a thread from an internal thread pool.
# The `threads` method setting takes two numbers: a minimum and maximum.
# Any libraries that use thread pools should be configured to match
# the maximum value specified for Puma. Default is set to 5 threads for minimum
# and maximum; this matches the default thread size of Active Record.
#
# https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#adding-puma-to-your-application
max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
threads min_threads_count, max_threads_count

# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
#
port        ENV.fetch("PORT") { 3000 }

# Specifies the `environment` that Puma will run in.
#
environment ENV.fetch("RAILS_ENV") { "development" }

# Specifies the `pidfile` that Puma will use.
pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }

# Specifies the number of `workers` to boot in clustered mode.
# Workers are forked web server processes. If using threads and workers together
# the concurrency of the application would be max `threads` * `workers`.
# Workers do not work on JRuby or Windows (both of which do not support
# processes).
#
workers ENV.fetch("WEB_CONCURRENCY") { 2 }

# Use the `preload_app!` method when specifying a `workers` number.
# This directive tells Puma to first boot the application and load code
# before forking the application. This takes advantage of Copy On Write
# process behavior so workers use less memory.
#
preload_app!

# Allow puma to be restarted by `rails restart` command.
plugin :tmp_restart

# https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
on_worker_boot do
  ActiveRecord::Base.establish_connection

  require 'redis_provider'
  RedisProvider.redis
end

require 'barnes'

# https://devcenter.heroku.com/articles/language-runtime-metrics-ruby#getting-started
before_fork do
  Barnes.start # Must have enabled worker mode for this to block to be called
end

lowlevel_error_handler do |ex, env|
#  Raven.capture_exception(ex, message: ex.message, extra: { puma: env }, culprit: 'Puma')
  [500, { 'Content-Type' => 'text/html' }, File.open(Rails.root.join('public', '500.html'))]
end
