RubyHook method là method Ruby tự gọi khi xảy ra sự kiện nhất định — subclass tạo, module được include, v.v.
Dùng để tự động hóa setup hoặc theo dõi class hierarchy.
ruby
# inherited: gọi khi tạo subclass
class Base
def self.inherited(subclass)
puts "#{subclass} inherits from #{self}"
end
end
class Child < Base # => "Child inherits from Base"
# included: gọi khi module được include
module Trackable
def self.included(base)
puts "#{self} included in #{base}"
base.extend(ClassMethods) # pattern thêm class method tự động
end
module ClassMethods
def track = puts "tracking #{self}"
end
end
class Order
include Trackable # => "Trackable included in Order"
end
Order.track # => "tracking Order"Ứng dụng: tự đăng ký plugin/class vào registry, inject class method khi include, audit class loading.
Hook methods are methods Ruby calls automatically when specific events occur — a subclass is created, a module is included, etc.
Used to automate setup or track class hierarchies.
ruby
# inherited: called when a subclass is created
class Base
def self.inherited(subclass)
puts "#{subclass} inherits from #{self}"
end
end
class Child < Base # => "Child inherits from Base"
# included: called when the module is included
module Trackable
def self.included(base)
puts "#{self} included in #{base}"
base.extend(ClassMethods)
end
module ClassMethods
def track = puts "tracking #{self}"
end
end
class Order
include Trackable
end
Order.track # => "tracking Order"Practical uses: self-registering plugins, injecting class methods on include, auditing class loading.