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|
# frozen_string_literal: true
module Gitlab
class Experiment
module Nestable
extend ActiveSupport::Concern
included do
set_callback :run, :around, :manage_nested_stack
end
def nest_experiment(nested_experiment)
instance_exec(nested_experiment, &Configuration.nested_behavior)
end
private
def manage_nested_stack
Stack.push(self)
yield
ensure
Stack.pop
end
class Stack
include Singleton
delegate :pop, :length, :size, :[], to: :stack
class << self
delegate :pop, :push, :length, :size, :[], to: :instance
end
def initialize
@thread_key = "#{self.class};#{object_id}".to_sym
end
def push(instance)
stack.last&.nest_experiment(instance)
stack.push(instance)
end
private
def stack
Thread.current[@thread_key] ||= []
end
end
end
end
end
|
