1. on_error: StandardErrorͰݺΕΔ 4. on_shutdown: ॲཧ͕ऴΘͬͨͱ͖ɻதஅ͞Εͨͱ͖ʹ࣮ߦ͞ΕΔɻ 5. on_complete: on_shutdownͷޙɻ࠶enqueueͷඞཁ͕ͳ͍ͱ͖ɻ 6. after_perform: Perform͕ऴΘͬͨޙʹ࣮ߦ͞ΕΔɻ D 1. ॲཧ͖͢σʔλͷྻΛ࡞ 2. on_startϝιου࣮ߦ 3. RunϞσϧͷσʔλͷ։࢝࣌ࠁͱॲཧ༧ఆ݅Λߋ৽ 1. update!(started_at: Time.now, tick_total: count) 3 3