Contains various information about an application process.
The owner pipe of the application instance (an IO object). Please see RequestHandler for a description of the owner pipe.
A hash containing all server sockets that this application process listens on. The hash is in the form of:
{ name1 => [socket_address1, socket_type1], name2 => [socket_address2, socket_type2], ... }
name is a Symbol. socket_addressx is the address of the socket and socket_type1 is the socket's type (either 'unix' or 'tcp'). There's guaranteed to be at least one server socket, namely one with the name :main.
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.
# File lib/phusion_passenger/app_process.rb, line 59 def self.detect_framework_version(app_root) if File.directory?("#{app_root}/vendor/rails/railties") # NOTE: We must check for 'rails/railties' and not just 'rails'. # Typo's vendor directory contains an empty 'rails' directory. return :vendor end environment_rb = File.read("#{app_root}/config/environment.rb") environment_rb =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/ gem_version_spec = $1 if gem_version_spec.nil? return nil end search_results = search_gem('rails', gem_version_spec) found_version = search_results.map do |x| x.version.version end.sort.last if found_version.nil? # If this error was reported before, then the cache might be out of # date because the Rails version may have been installed now. # So we reload the RubyGems cache and try again. Gem.clear_paths search_results = search_gem('rails', gem_version_spec) found_version = search_results.map do |x| x.version.version end.sort.last end if found_version.nil? raise VersionNotFound.new("There is no Ruby on Rails version " << "installed that matches version \"#{gem_version_spec}\"", gem_version_spec) else return found_version end end
Creates a new AppProcess instance. The parameters correspond with the attributes of the same names. No exceptions will be thrown.
# File lib/phusion_passenger/app_process.rb, line 149 def initialize(app_root, pid, owner_pipe, server_sockets) @app_root = app_root @pid = pid @owner_pipe = owner_pipe # We copy the values like this so one can directly pass # AbstractRequestHandler#server_sockets as arguments # without having AppProcess store references to the socket # IO objects. @server_sockets = {} server_sockets.each_pair do |name, value| @server_sockets[name] = [value[0], value[1]] end end
Construct an AppProcess by reading information from the given MessageChannel. The other side of the channel must be writing AppProcess information using AppProcess#write_to_channel.
Might raise SystemCallError, IOError or SocketError.
# File lib/phusion_passenger/app_process.rb, line 114 def self.read_from_channel(channel) app_root, pid, n_server_sockets = channel.read if app_root.nil? raise IOError, "Connection closed" end server_sockets = {} n_server_sockets.to_i.times do message = channel.read if message.nil? raise IOError, "Connection closed" end name = message.shift server_sockets[name.to_sym] = message end owner_pipe = channel.recv_io return new(app_root, pid.to_i, owner_pipe, server_sockets) end
# File lib/phusion_passenger/app_process.rb, line 97 def self.search_gem(gem_name, gem_version_spec) if defined?(Gem::Specification) && Gem::Specification.respond_to?(:find_all_by_name) return Gem::Specification.find_all_by_name(gem_name, gem_version_spec) elsif Gem.respond_to?(:source_index) dep = Gem::Dependency.new(gem_name, gem_version_spec) return Gem.source_index.search(dep, true) else dep = Gem::Dependency.new(gem_name, gem_version_spec) return Gem.cache.search(dep, true) end end
Close the connection with the application process. If there are no other processes that have connections to this application process, then it will shutdown as soon as possible.
See also AbstractRequestHandler#owner_pipe.
# File lib/phusion_passenger/app_process.rb, line 169 def close @owner_pipe.close rescue nil end
Write this AppProcess's information over the given MessageChannel. The other side must read the information using AppProces.read_from_channel.
Might raise SystemCallError, IOError or SocketError.
# File lib/phusion_passenger/app_process.rb, line 139 def write_to_channel(channel) channel.write(@app_root, @pid, @server_sockets.size) @server_sockets.each_pair do |name, value| channel.write(name.to_s, *value) end channel.send_io(@owner_pipe) end
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