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Class: Puma::Configuration

Relationships & Source Files
Namespace Children
Classes:
Inherits: Object
Defined in: lib/puma/configuration.rb

Overview

The main configuration class of ::Puma.

It can be initialized with a set of “user” options and “default” options. Defaults will be merged with #puma_default_options.

This class works together with 2 main other classes the UserFileDefaultOptions which stores configuration options in order so the precedence is that user set configuration wins over “file” based configuration wins over “default” configuration. These configurations are set via the DSL class. This class powers the ::Puma config file syntax and does double duty as a configuration DSL used by the CLI and ::Puma rack handler.

It also handles loading plugins.

Note:

‘:port` and :host are not valid keys. By the time they make it to the configuration options they are expected to be incorporated into a :binds key. Under the hood the DSL maps port and host calls to :binds

config = Configuration.new({}) do |user_config, file_config, default_config|
  user_config.port 3003
end
config.load
puts config.options[:port]
# => 3003

It is expected that #load is called on the configuration instance after setting config. This method expands any values in config_file and puts them into the correct configuration option hash.

Once all configuration is complete it is expected that #clamp will be called on the instance. This will expand any procs stored under “default” values. This is done because an environment variable may have been modified while loading configuration files.

Constant Summary

  • DEFAULTS =
    # File 'lib/puma/configuration.rb', line 129
    {
      auto_trim_time: 30,
      binds: ['tcp://0.0.0.0:9292'.freeze],
      clean_thread_locals: false,
      debug: false,
      early_hints: nil,
      environment: 'development'.freeze,
      # Number of seconds to wait until we get the first data for the request
      first_data_timeout: 30,
      io_selector_backend: :auto,
      log_requests: false,
      logger: STDOUT,
      # How many requests to attempt inline before sending a client back to
      # the reactor to be subject to normal ordering. The idea here is that
      # we amortize the cost of going back to the reactor for a well behaved
      # but very "greedy" client across 10 requests. This prevents a not
      # well behaved client from monopolizing the thread forever.
      max_fast_inline: 10,
      max_threads: Puma.mri? ? 5 : 16,
      min_threads: 0,
      mode: :http,
      mutate_stdout_and_stderr_to_sync_on_write: true,
      out_of_band: [],
      # Number of seconds for another request within a persistent session.
      persistent_timeout: 20,
      queue_requests: true,
      rackup: 'config.ru'.freeze,
      raise_exception_on_sigterm: true,
      reaping_time: 1,
      remote_address: :socket,
      silence_single_worker_warning: false,
      tag: File.basename(Dir.getwd),
      tcp_host: '0.0.0.0'.freeze,
      tcp_port: 9292,
      wait_for_less_busy_worker: 0.005,
      worker_boot_timeout: 60,
      worker_check_interval: 5,
      worker_culling_strategy: :youngest,
      worker_shutdown_timeout: 30,
      worker_timeout: 60,
      workers: 0,
    }

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(user_options = {}, default_options = {}, &block) ⇒ Configuration

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 172

def initialize(user_options={}, default_options = {}, &block)
  default_options = self.puma_default_options.merge(default_options)

  @options     = UserFileDefaultOptions.new(user_options, default_options)
  @plugins     = PluginLoader.new
  @user_dsl    = DSL.new(@options.user_options, self)
  @file_dsl    = DSL.new(@options.file_options, self)
  @default_dsl = DSL.new(@options.default_options, self)

  if !@options[:prune_bundler]
    default_options[:preload_app] = (@options[:workers] > 1) && Puma.forkable?
  end

  if block
    configure(&block)
  end
end

Class Method Details

.random_token (private)

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 379

def self.random_token
  require 'securerandom' unless defined?(SecureRandom)

  SecureRandom.hex(16)
end

.temp_path

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 329

def self.temp_path
  require 'tmpdir'

  t = (Time.now.to_f * 1000).to_i
  "#{Dir.tmpdir}/puma-status-#{t}-#{$$}"
end

Instance Attribute Details

#app_configured?Boolean (readonly)

Indicate if there is a properly configured app

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 274

def app_configured?
  @options[:app] || File.exist?(rackup)
end

#options (readonly)

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 190

attr_reader :options, :plugins

#plugins (readonly)

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 190

attr_reader :options, :plugins

Instance Method Details

#app

Load the specified rackup file, pull options from the rackup file, and set @app.

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 285

def app
  found = options[:app] || load_rackup

  if @options[:log_requests]
    require_relative 'commonlogger'
    logger = @options[:logger]
    found = CommonLogger.new(found, logger)
  end

  ConfigMiddleware.new(self, found)
end

#clamp

Call once all configuration (included from rackup files) is loaded to flesh out any defaults

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 255

def clamp
  @options.finalize_values
end

#config_files

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 240

def config_files
  files = @options.all_of(:config_files)

  return [] if files == ['-']
  return files if files.any?

  first_default_file = %W(config/puma/#{@options[:environment]}.rb config/puma.rb).find do |f|
    File.exist?(f)
  end

  [first_default_file]
end

#configure

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 192

def configure
  yield @user_dsl, @file_dsl, @default_dsl
ensure
  @user_dsl._offer_plugins
  @file_dsl._offer_plugins
  @default_dsl._offer_plugins
end

#environment

Return which environment we’re running in

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 298

def environment
  @options[:environment]
end

#final_options

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 325

def final_options
  @options.final_options
end

#flatten

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 206

def flatten
  dup.flatten!
end

#flatten!

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 210

def flatten!
  @options = @options.flatten
  self
end

#initialize_copy(other)

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 200

def initialize_copy(other)
  @conf        = nil
  @cli_options = nil
  @options     = @options.dup
end

#load

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 234

def load
  config_files.each { |config_file| @file_dsl._load_from(config_file) }

  @options
end

#load_plugin(name)

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 302

def load_plugin(name)
  @plugins.create name
end

#load_rackup (private)

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 361

def load_rackup
  raise "Missing rackup file '#{rackup}'" unless File.exist?(rackup)

  rack_app, rack_options = rack_builder.parse_file(rackup)
  rack_options = rack_options || {}

  @options.file_options.merge!(rack_options)

  config_ru_binds = []
  rack_options.each do |k, v|
    config_ru_binds << v if k.to_s.start_with?("bind")
  end

  @options.file_options[:binds] = config_ru_binds unless config_ru_binds.empty?

  rack_app
end

#puma_default_options

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 215

def puma_default_options
  defaults = DEFAULTS.dup
  puma_options_from_env.each { |k,v| defaults[k] = v if v }
  defaults
end

#puma_options_from_env

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 221

def puma_options_from_env
  min = ENV['PUMA_MIN_THREADS'] || ENV['MIN_THREADS']
  max = ENV['PUMA_MAX_THREADS'] || ENV['MAX_THREADS']
  workers = ENV['WEB_CONCURRENCY']

  {
    min_threads: min && Integer(min),
    max_threads: max && Integer(max),
    workers: workers && Integer(workers),
    environment: ENV['APP_ENV'] || ENV['RACK_ENV'] || ENV['RAILS_ENV'],
  }
end

#rack_builder (private)

Load and use the normal Rack builder if we can, otherwise fallback to our minimal version.

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 340

def rack_builder
  # Load bundler now if we can so that we can pickup rack from
  # a Gemfile
  if ENV.key? 'PUMA_BUNDLER_PRUNED'
    begin
      require 'bundler/setup'
    rescue LoadError
    end
  end

  begin
    require 'rack'
    require 'rack/builder'
  rescue LoadError
    # ok, use builtin version
    return Puma::Rack::Builder
  else
    return ::Rack::Builder
  end
end

#rackup

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 278

def rackup
  @options[:rackup]
end

#run_hooks(key, arg, log_writer, hook_data = nil)

Parameters:

  • key (:Symbol)

    hook to run

  • arg (Launcher, Int)

    :on_restart passes Launcher

[ GitHub ]

  
# File 'lib/puma/configuration.rb', line 309

def run_hooks(key, arg, log_writer, hook_data = nil)
  @options.all_of(key).each do |b|
    begin
      if Array === b
        hook_data[b[1]] ||= Hash.new
        b[0].call arg, hook_data[b[1]]
      else
        b.call arg
      end
    rescue => e
      log_writer.log "WARNING hook #{key} failed with exception (#{e.class}) #{e.message}"
      log_writer.debug e.backtrace.join("\n")
    end
  end
end