cache

type Cache interface {
	Get(key string) (interface{}, error)
	GetItem(key string) (*Item, error)
	GetBySecondaryKey(secondaryKey string) (interface{}, error)
	GetItemBySecondaryKey(secondaryKey string) (*Item, error)
	GetForeignKeys() []string
	GetItemsByForeignKey(foreignKey string) ([]*Item, error)
	GetKeys() []string
	HasItemChanged(key string, data interface{}) (bool, error)
	HasItemBySecondaryKeyChanged(secondaryKey string, data interface{}) (bool, error)
	Set(key string, data interface{}) error
	SetWithSecondaryKey(key string, secondaryKey string, data interface{}) error
	SetWithForeignKey(key string, foreignKey string, data interface{}) error
	SetSecondaryKey(key string, secondaryKey string) error
	SetForeignKey(key string, foreignKey string) error
	Delete(key string) error
	DeleteBySecondaryKey(secondaryKey string) error
	DeleteSecondaryKey(secondaryKey string) error
	DeleteForeignKey(foreignKey string) error
	DeleteItemsByForeignKey(foreignKey string) error
	Flush()
	Save(path string) error
	Load(path string) error
}

type GetItem interface {
	Get(key string) (interface{}, error)
}

type Item struct {
	Object          interface{}     `json:"data"`
	UpdateTime      int64           `json:"updateTime"`
	Hash            uint64          `json:"hash"`
	SecondaryKeys   map[string]bool `json:"secondaryKeys"` // keep track of secondary keys for clean up
	ForeignKey      string          `json:"foreignKey"`
	ContainsPointer bool            `json:"containsPointer"` // does item contain a pointer
}

type MockCache struct {
}