Class: Module

Inherits:
Object show all
Defined in:
lib/rad/_support/module.rb

Instance Method Summary collapse

Instance Method Details

#cache_method_with_params_in_production(method) ⇒ Object

Dynamically enables cache in :production and disables in another environments. If no environment given uses non-cached version.



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# File 'lib/rad/_support/module.rb', line 7

def cache_method_with_params_in_production method
  escaped_method = escape_method(method)
  method_with_cache, method_without_cache = "#{escaped_method}_with_cache", "#{escaped_method}_without_cache"
  iv = "@#{escaped_method}_cache"

  # raise "Method '#{method}' already defined!" if instance_methods.include?(method)
  if instance_methods.include?(method_with_cache) or instance_methods.include?(method_without_cache)
    warn "can't cache the :#{method} twice!"
  else
    alias_method method_without_cache, method

    # create cached method
    define_method method_with_cache do |*args|
      unless results = instance_variable_get(iv)
        results = Hash.new(NotDefined)
        instance_variable_set iv, results
      end

      result = results[args]

      if result.equal? NotDefined
        result = send method_without_cache, *args
        results[args] = result
      end

      result
    end

    if rad.mode == :production
      alias_method method, method_with_cache
    else
      alias_method method, method_without_cache
    end

    # by default uses non-cached version
    # alias_method method, method_without_cache
  end
end