Class PhusionPassenger::Rack::ApplicationSpawner
In: lib/phusion_passenger/rack/application_spawner.rb
Parent: Object

Class for spawning Rack applications.

Methods

spawn_application   spawn_application  

Included Modules

Utils

Public Class methods

spawn_application(*args)

[Source]

    # File lib/phusion_passenger/rack/application_spawner.rb, line 43
43:         def self.spawn_application(*args)
44:                 @@instance ||= ApplicationSpawner.new
45:                 @@instance.spawn_application(*args)
46:         end

Public Instance methods

spawn_application(app_root, options = {})

Spawn an instance of the given Rack application. When successful, an Application object will be returned, which represents the spawned application.

Accepts the same options as Railz::ApplicationSpawner#initialize.

Raises:

  • AppInitError: The Rack application raised an exception or called exit() during startup.
  • SystemCallError, IOError, SocketError: Something went wrong.

[Source]

    # File lib/phusion_passenger/rack/application_spawner.rb, line 58
58:         def spawn_application(app_root, options = {})
59:                 options = sanitize_spawn_options(options)
60:                 
61:                 a, b = UNIXSocket.pair
62:                 pid = safe_fork(self.class.to_s, true) do
63:                         a.close
64:                         
65:                         file_descriptors_to_leave_open = [0, 1, 2, b.fileno]
66:                         NativeSupport.close_all_file_descriptors(file_descriptors_to_leave_open)
67:                         close_all_io_objects_for_fds(file_descriptors_to_leave_open)
68:                         
69:                         run(MessageChannel.new(b), app_root, options)
70:                 end
71:                 b.close
72:                 Process.waitpid(pid) rescue nil
73:                 
74:                 channel = MessageChannel.new(a)
75:                 unmarshal_and_raise_errors(channel, !!options["print_exceptions"], "rack")
76:                 
77:                 # No exception was raised, so spawning succeeded.
78:                 pid, socket_name, socket_type = channel.read
79:                 if pid.nil?
80:                         raise IOError, "Connection closed"
81:                 end
82:                 owner_pipe = channel.recv_io
83:                 return Application.new(@app_root, pid, socket_name,
84:                         socket_type, owner_pipe)
85:         end

[Validate]