Module: StorageRoom::IdentityMap::ClassMethods

Defined in:
lib/storage_room/identity_map.rb

Instance Method Summary collapse

Instance Method Details

#identity_map ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 59

def identity_map
  @identity_map ||= {}
end

#identity_map=(v) ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 63

def identity_map=(v)
  @identity_map = v
end

#identity_map_off ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 75

def identity_map_off
  @identity_map_status = false
end

#identity_map_off? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/storage_room/identity_map.rb', line 83

def identity_map_off?
  !identity_map_on?
end

#identity_map_on ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 71

def identity_map_on
  @identity_map_status = true
end

#identity_map_on? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/storage_room/identity_map.rb', line 79

def identity_map_on?
  identity_map_status
end

#identity_map_status ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 67

def identity_map_status
  defined?(@identity_map_status) ? @identity_map_status : true
end

#inherited(descendant) ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 19

def inherited(descendant)
  descendant.identity_map = identity_map
  super
end

#load(url, parameters = {}) ⇒ Object

Load an object from the identity map if the key (URL) exists



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# File 'lib/storage_room/identity_map.rb', line 25

def load(url, parameters = {})
  return nil if url.nil?
  
  if identity_map_on? && object = identity_map[url]
    StorageRoom.log("Loaded #{object} (#{url}) from identity map (load)")
    object
  else
    super
  end
end

#new_from_response_data(response_data) ⇒ Object

Load an object from the identity map or create it



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# File 'lib/storage_room/identity_map.rb', line 37

def new_from_response_data(response_data)        
  url = response_data['@url'] || response_data['url']
  object = url ? identity_map[url] : nil
          
  if object.present? && identity_map_on?
    if object.loaded? && response_data_is_association?(response_data)
      StorageRoom.log("Loaded #{object} (#{url}) from identity map (new_from_response_data)")
    else
      StorageRoom.log("Loaded #{object} (#{url}) from identity map and updated attributes (new_from_response_data)")
      object.set_from_response_data(response_data) 
    end
  else
    object = super
    if identity_map_on? && url.present? && object.is_a?(Model)
      identity_map[url] = object 
      StorageRoom.log("Storing #{url} in identity map: #{object}")
    end
  end
  
  object
end

#without_identity_map(&block) ⇒ Object 



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# File 'lib/storage_room/identity_map.rb', line 87

def without_identity_map(&block)
  identity_map_off
  yield
ensure
  identity_map_on
end