Module: EntitySnapshot::Postgres::Get

Included in:
EntitySnapshot::Postgres, ReadOnly
Defined in:
lib/entity_snapshot/postgres/get.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.prepended(cls) ⇒ Object 



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# File 'lib/entity_snapshot/postgres/get.rb', line 4

def self.prepended(cls)
  cls.class_exec do
    include StreamName
  end
end

Instance Method Details

#get(id) ⇒ Object 



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# File 'lib/entity_snapshot/postgres/get.rb', line 10

def get(id)
  stream_name = snapshot_stream_name(id)

  logger.trace(tags: [:snapshot, :cache, :get]) { "Reading snapshot (Stream: #{stream_name.inspect}, Entity Class: #{entity_class.name})" }

  event_data = read.(stream_name)

  if event_data.nil?
    logger.debug(tags: [:snapshot, :cache, :get]) { "No snapshot record (Stream: #{stream_name.inspect}, Entity Class: #{entity_class.name})" }
    return
  end

  entity_data = event_data.data[:entity_data]

  entity = Transform::Read.instance(entity_data, entity_class)

  version = event_data.data[:entity_version]

  time = event_data.data[:time]

  # Backward compatibility for messages not written with
  # a timestamp in the message data
  # Sat Oct 13, Scott Bellware
  if time.nil?
    time ||= event_data.time
  else
    time = Time.parse(time)
  end

  logger.debug(tags: [:snapshot, :cache, :get]) { "Read snapshot (Stream: #{stream_name.inspect}, Entity Class: #{entity_class.name}, Version: #{version.inspect}, Time: #{time.utc.iso8601(3)})" }

  return entity, version, time
end