demarches-normaliennes/config/puma.rb

# 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.
#
threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
threads threads_count, 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" }

if ENV.fetch("RAILS_ENV") == "production"
  # Specifies the number of `workers` to boot in clustered mode.
  # Workers are forked webserver 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. If you use this option
  # you need to make sure to reconnect any threads in the `on_worker_boot`
  # block.
  #
  preload_app!

  # If you are preloading your application and using Active Record, it's
  # recommended that you close any connections to the database before workers
  # are forked to prevent connection leakage.
  #
  before_fork do
    ActiveRecord::Base.connection_pool.disconnect! if defined?(ActiveRecord)
  end

  # The code in the `on_worker_boot` will be called if you are using
  # clustered mode by specifying a number of `workers`. After each worker
  # process is booted, this block will be run. If you are using the `preload_app!`
  # option, you will want to use this block to reconnect to any threads
  # or connections that may have been created at application boot, as Ruby
  # cannot share connections between processes.
  #
  on_worker_boot do
    ActiveRecord::Base.establish_connection if defined?(ActiveRecord)
  end
end

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