Class for spawning Rack applications.
Methods
Included Modules
Public Class methods
[ show source ]
# File lib/phusion_passenger/rack/application_spawner.rb, line 34 34: def self.spawn_application(*args) 35: @@instance ||= ApplicationSpawner.new 36: @@instance.spawn_application(*args) 37: end
Public Instance methods
Spawn an instance of the given Rack application. When successful, an Application object will be returned, which represents the spawned application.
Raises:
- AppInitError: The Rack application raised an exception or called exit() during startup.
- SystemCallError, IOError, SocketError: Something went wrong.
[ show source ]
# File lib/phusion_passenger/rack/application_spawner.rb, line 47 47: def spawn_application(app_root, options = {}) 48: options = sanitize_spawn_options(options) 49: 50: a, b = UNIXSocket.pair 51: pid = safe_fork(self.class.to_s, true) do 52: a.close 53: 54: file_descriptors_to_leave_open = [0, 1, 2, b.fileno] 55: NativeSupport.close_all_file_descriptors(file_descriptors_to_leave_open) 56: close_all_io_objects_for_fds(file_descriptors_to_leave_open) 57: 58: run(MessageChannel.new(b), app_root, options) 59: end 60: b.close 61: Process.waitpid(pid) rescue nil 62: 63: channel = MessageChannel.new(a) 64: unmarshal_and_raise_errors(channel, "rack") 65: 66: # No exception was raised, so spawning succeeded. 67: pid, socket_name, socket_type = channel.read 68: if pid.nil? 69: raise IOError, "Connection closed" 70: end 71: owner_pipe = channel.recv_io 72: return Application.new(@app_root, pid, socket_name, 73: socket_type, owner_pipe) 74: end