class ActiveSupport::Reloader

Active Support Reloader¶ ↑

This class defines several callbacks:

to_prepare -- Run once at application startup, and also from
+to_run+.

to_run -- Run before a work run that is reloading. If
+reload_classes_only_on_change+ is true (the default), the class
unload will have already occurred.

to_complete -- Run after a work run that has reloaded. If
+reload_classes_only_on_change+ is false, the class unload will
have occurred after the work run, but before this callback.

before_class_unload -- Run immediately before the classes are
unloaded.

after_class_unload -- Run immediately after the classes are
unloaded.

Public Class Methods

after_class_unload (*args, &block)

Registers a callback that will run immediately after the classes are unloaded.

# File activesupport/lib/active_support/reloader.rb, line 44
def self.after_class_unload(*args, &block)
  set_callback(:class_unload, :after, *args, &block)
end

before_class_unload (*args, &block)

Registers a callback that will run immediately before the classes are unloaded.

# File activesupport/lib/active_support/reloader.rb, line 39
def self.before_class_unload(*args, &block)
  set_callback(:class_unload, *args, &block)
end

new ()

Calls superclass method

# File activesupport/lib/active_support/reloader.rb, line 99
def initialize
  super
  @locked = false
end

reload! ()

Initiate a manual reload

# File activesupport/lib/active_support/reloader.rb, line 51
def self.reload!
  executor.wrap do
    new.tap do |instance|
      instance.run!
    ensure
      instance.complete!
    end
  end
  prepare!
end

to_prepare (*args, &block)

Registers a callback that will run once at application startup and every time the code is reloaded.

# File activesupport/lib/active_support/reloader.rb, line 34
def self.to_prepare(*args, &block)
  set_callback(:prepare, *args, &block)
end

wrap (**kwargs) { || ... }

Run the supplied block as a work unit, reloading code as needed

# File activesupport/lib/active_support/reloader.rb, line 71
def self.wrap(**kwargs)
  return yield if active?

  executor.wrap(**kwargs) do
    instance = run!
    begin
      yield
    ensure
      instance.complete!
    end
  end
end

Public Instance Methods

release_unload_lock! ()

Release the unload lock if it has been previously obtained

# File activesupport/lib/active_support/reloader.rb, line 114
def release_unload_lock!
  if @locked
    @locked = false
    ActiveSupport::Dependencies.interlock.done_unloading
  end
end

require_unload_lock! ()

Acquire the ActiveSupport::Dependencies::Interlock unload lock, ensuring it will be released automatically

# File activesupport/lib/active_support/reloader.rb, line 106
def require_unload_lock!
  unless @locked
    ActiveSupport::Dependencies.interlock.start_unloading
    @locked = true
  end
end