package service type PersistenceServiceFacade struct { Redis *RedisPersistenceService Json *JsonPersistenceService Memory *MemoryService } // Get returns the preferred persistence service by fallbacks // Redis will be preferred at the first position. func (facade *PersistenceServiceFacade) Get() PersistenceService { if facade.Redis != nil { return facade.Redis } if facade.Json != nil { return facade.Json } return facade.Memory }