Class: Puma::Configuration

Inherits:
Object
  • Object
show all
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 ‘Configuration.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 `Puma::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.

Defined Under Namespace

Classes: ConfigMiddleware

Constant Summary collapse

DEFAULTS = 
{
  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,
  # Number of seconds to wait until the next request before shutting down.
  idle_timeout: nil,
  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,
  silence_fork_callback_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,
  http_content_length_limit: nil
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(user_options = {}, default_options = {}, &block) ⇒ Configuration

Returns a new instance of Configuration.



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# File 'lib/puma/configuration.rb', line 176

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

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/puma/configuration.rb', line 194

def options
  @options
end

#plugins ⇒ Object (readonly)

Returns the value of attribute plugins.



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# File 'lib/puma/configuration.rb', line 194

def plugins
  @plugins
end

Class Method Details

.temp_path ⇒ Object 



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# File 'lib/puma/configuration.rb', line 333

def self.temp_path
  require 'tmpdir'

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

Instance Method Details

#app ⇒ Object

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



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# File 'lib/puma/configuration.rb', line 289

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

#app_configured? ⇒ Boolean

Indicate if there is a properly configured app

Returns:

  • (Boolean) 


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

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

#clamp ⇒ Object

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



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# File 'lib/puma/configuration.rb', line 259

def clamp
  @options.finalize_values
end

#config_files ⇒ Object 



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# File 'lib/puma/configuration.rb', line 244

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 ⇒ Object 



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# File 'lib/puma/configuration.rb', line 196

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

#environment ⇒ Object

Return which environment we’re running in



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

def environment
  @options[:environment]
end

#final_options ⇒ Object 



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

def final_options
  @options.final_options
end

#flatten ⇒ Object 



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

def flatten
  dup.flatten!
end

#flatten! ⇒ Object 



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# File 'lib/puma/configuration.rb', line 214

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

#initialize_copy(other) ⇒ Object 



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# File 'lib/puma/configuration.rb', line 204

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

#load ⇒ Object 



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# File 'lib/puma/configuration.rb', line 238

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

  @options
end

#load_plugin(name) ⇒ Object 



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# File 'lib/puma/configuration.rb', line 306

def load_plugin(name)
  @plugins.create name
end

#puma_default_options ⇒ Object 



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# File 'lib/puma/configuration.rb', line 219

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 ⇒ Object 



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# File 'lib/puma/configuration.rb', line 225

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

#rackup ⇒ Object 



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# File 'lib/puma/configuration.rb', line 282

def rackup
  @options[:rackup]
end

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

Parameters:

  • key (:Symbol) —

    hook to run

  • arg (Launcher, Int) —

    ‘:on_restart` passes Launcher



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# File 'lib/puma/configuration.rb', line 313

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