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 39
39:         def self.spawn_application(*args)
40:                 @@instance ||= ApplicationSpawner.new
41:                 @@instance.spawn_application(*args)
42:         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 54
54:         def spawn_application(app_root, options = {})
55:                 options = sanitize_spawn_options(options)
56:                 
57:                 a, b = UNIXSocket.pair
58:                 pid = safe_fork(self.class.to_s, true) do
59:                         a.close
60:                         
61:                         file_descriptors_to_leave_open = [0, 1, 2, b.fileno]
62:                         NativeSupport.close_all_file_descriptors(file_descriptors_to_leave_open)
63:                         close_all_io_objects_for_fds(file_descriptors_to_leave_open)
64:                         
65:                         run(MessageChannel.new(b), app_root, options)
66:                 end
67:                 b.close
68:                 Process.waitpid(pid) rescue nil
69:                 
70:                 channel = MessageChannel.new(a)
71:                 unmarshal_and_raise_errors(channel, !!options["print_exceptions"], "rack")
72:                 
73:                 # No exception was raised, so spawning succeeded.
74:                 pid, socket_name, socket_type = channel.read
75:                 if pid.nil?
76:                         raise IOError, "Connection closed"
77:                 end
78:                 owner_pipe = channel.recv_io
79:                 return Application.new(@app_root, pid, socket_name,
80:                         socket_type, owner_pipe)
81:         end

[Validate]