PresentPorcessorFactory
PresentOfferPorcessor（实现）
present
PromotionInstanceRepository
save
create present offers info
filter and sort promotions
PromotionDetailRepository
processor
PromotionRepository
getProcessor
PresentAmountPorcessor
PresentPorcessor
get promotion
PresentDurationPorcessor（实现）
PresentXXXXPorcessor
promotions
赠送处理，调用订单赠送或计费赠送时长
PresentMessageListener
PromotionProvider
getPromotions
PromotionService
