Module: Promiscuous::Subscriber::Model::Base

Extended by:
ActiveSupport::Concern
Included in:
ActiveRecord, Mongoid, Mongoid::EmbeddedDocs, Observer
Defined in:
lib/promiscuous/subscriber/model/base.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#__promiscuous_eventual_consistency_update(operation) ⇒ Object 



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# File 'lib/promiscuous/subscriber/model/base.rb', line 4

def __promiscuous_eventual_consistency_update(operation)
  return true unless operation.dependency.try(&:version)

  version = operation.dependency.version
  generation = operation.message.generation
  version = (generation << 50) | version

  if self.attributes[Promiscuous::Config.version_field].to_i <= version
    self.send("#{Promiscuous::Config.version_field}=", version)
    true
  else
    Promiscuous.debug "[receive] out of order message #{self.class}/#{id}/g:#{generation},v:#{version}"
    false
  end
end

#__promiscuous_update(payload, options = {}) ⇒ Object 



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# File 'lib/promiscuous/subscriber/model/base.rb', line 20

def __promiscuous_update(payload, options={})
  self.class.subscribed_attrs.map(&:to_s).each do |attr|
    unless payload.attributes.has_key?(attr)
      "Attribute '#{attr}' is missing from the payload".tap do |error_msg|
        Promiscuous.warn "[receive] #{error_msg}"
        raise error_msg
      end
    end

    value = payload.attributes[attr]
    update = true

    attr_payload = Promiscuous::Subscriber::Operation.new(value)
    if model = attr_payload.model
      # Nested subscriber
      old_value =  __send__(attr)
      instance = old_value || model.__promiscuous_fetch_new(attr_payload.id)

      if instance.class != model
        # Because of the nasty trick with 'promiscuous_embedded_many'
        instance = model.__promiscuous_fetch_new(attr_payload.id)
      end

      nested_options = {:parent => self, :old_value => old_value}
      update = instance.__promiscuous_update(attr_payload, nested_options)
      value = instance
    end

    self.__send__("#{attr}=", value) if update
    true
  end
end