Represents a single Ruby on Rails application instance.

Methods
Attributes
[R] app_root The root directory of this application, i.e. the directory that contains ‘app/’, ‘public/’, etc.
[R] listen_socket_name The name of the Unix socket on which the application instance will accept new connections.
[R] owner_pipe The owner pipe of the application instance (an IO object). Please see RequestHandler for a description of the owner pipe.
[R] pid The process ID of this application instance.
Public Class methods
detect_framework_version(app_root)
  • Returns the Ruby on Rails version that the application requires.
  • Returns :vendor if the application has a vendored Rails.
  • Returns nil if the application doesn‘t specify a particular version.

Raises VersionNotFound if the required Rails version is not installed.

[ show source ]

    # File lib/passenger/application.rb, line 55
55:         def self.detect_framework_version(app_root)
56:                 if File.directory?("#{app_root}/vendor/rails/railties")
57:                         # NOTE: We must check for 'rails/railties' and not just 'rails'.
58:                         # Typo's vendor directory contains an empty 'rails' directory.
59:                         return :vendor
60:                 end
61:                 
62:                 environment_rb = File.read("#{app_root}/config/environment.rb")
63:                 environment_rb =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
64:                 gem_version_spec = $1
65:                 if gem_version_spec.nil?
66:                         return nil
67:                 end
68:                 
69:                 found_version = Gem.cache.search('rails', gem_version_spec).map do |x|
70:                         x.version.version
71:                 end.sort.last
72:                 if found_version.nil?
73:                         # If this error was reported before, then the cache might be out of
74:                         # date because the Rails version may have been installed now.
75:                         # So we reload the RubyGems cache and try again.
76:                         Gem.clear_paths
77:                         found_version = Gem.cache.search('rails', gem_version_spec).map do |x|
78:                                 x.version.version
79:                         end.sort.last
80:                 end
81:                 
82:                 if found_version.nil?
83:                         raise VersionNotFound.new("There is no Ruby on Rails version " <<
84:                                 "installed that matches version \"#{gem_version_spec}\"",
85:                                 gem_version_spec)
86:                 else
87:                         return found_version
88:                 end
89:         end
new(app_root, pid, listen_socket_name, using_abstract_namespace, owner_pipe)

Creates a new instance of Application. The parameters correspond with the attributes of the same names. No exceptions will be thrown.

[ show source ]

    # File lib/passenger/application.rb, line 93
93:         def initialize(app_root, pid, listen_socket_name, using_abstract_namespace, owner_pipe)
94:                 @app_root = app_root
95:                 @pid = pid
96:                 @listen_socket_name = listen_socket_name
97:                 @using_abstract_namespace = using_abstract_namespace
98:                 @owner_pipe = owner_pipe
99:         end
Public Instance methods
close()

Close the connection with the application instance. If there are no other processes that have connections to this application instance, then it will shutdown as soon as possible.

See also RequestHandler#owner_pipe.

[ show source ]

     # File lib/passenger/application.rb, line 115
115:         def close
116:                 @owner_pipe.close rescue nil
117:         end
using_abstract_namespace?()

Whether listen_socket_name refers to a Unix socket in the abstract namespace. In any case, listen_socket_name does not contain the leading null byte.

Note that at the moment, only Linux seems to support abstract namespace Unix sockets.

[ show source ]

     # File lib/passenger/application.rb, line 106
106:         def using_abstract_namespace?
107:                 return @using_abstract_namespace
108:         end