cache

Documentation

Index

• Variables
• func IsNil(err error) bool
• func Marshal(ctx context.Context, data interface{}, options *Options) ([]byte, error)
• func Unmarshal(ctx context.Context, data []byte, v interface{}, options *Options) error
• type Cache
• type Depend
• type GetOrSetValue
  • func (g *GetOrSetValue) Scan(v interface{}) error
• type KeyDepend
  • func NewKeyDepend(store Cache, key string) *KeyDepend
  • func (v *KeyDepend) InvalidKey(ctx context.Context) error
  • func (v *KeyDepend) Val(ctx context.Context) interface{}
  • func (v *KeyDepend) Valid(ctx context.Context) error
• type NilDep
  • func (n *NilDep) Valid(ctx context.Context) error
• type Option
  • func Expiration(t time.Duration) Option
  • func WithDepend(depend Depend) Option
  • func WithKeyDepend(store Cache, key string) Option
• type Options
  • func NewOptions(opts ...Option) *Options
• type Value
  • func NewValue(ctx context.Context, data string, options *Options, err ...error) Value

Variables

var ErrDependNotValid = errors.New("depend not valid")

var (
	ErrNil = errors.New("cache: nil")
)

Functions

func IsNil

func IsNil(err error) bool

func Marshal

func Marshal(ctx context.Context, data interface{}, options *Options) ([]byte, error)

func Unmarshal

func Unmarshal(ctx context.Context, data []byte, v interface{}, options *Options) error

Types

type Cache

type Cache interface {
	GetOrSet(ctx context.Context, key string, set func() (interface{}, error), opts ...Option) Value
	Set(ctx context.Context, key string, val interface{}, opts ...Option) Value
	Get(ctx context.Context, key string, opts ...Option) Value
	Has(ctx context.Context, key string) (bool, error)
	Del(ctx context.Context, key string) error
	Close() error
}

type Depend

type Depend interface {
	Val(ctx context.Context) interface{}
	Valid(ctx context.Context) error
}

type GetOrSetValue

type GetOrSetValue struct {
	Value
	Set func() Value
}

func (*GetOrSetValue) Scan

func (g *GetOrSetValue) Scan(v interface{}) error

type KeyDepend

type KeyDepend struct {
	Key   string `json:"key"`
	Value int64  `json:"Value"`
	// contains filtered or unexported fields
}

KeyDepend key依赖

func NewKeyDepend

func NewKeyDepend(store Cache, key string) *KeyDepend

func (*KeyDepend) InvalidKey

func (v *KeyDepend) InvalidKey(ctx context.Context) error

InvalidKey 使key失效

func (*KeyDepend) Val

func (v *KeyDepend) Val(ctx context.Context) interface{}

Val 获取依赖的值

func (*KeyDepend) Valid

func (v *KeyDepend) Valid(ctx context.Context) error

Valid 检查依赖是否有效

type NilDep

type NilDep struct {
	Depend
}

NilDep 用于set的时候反序列化,减少一次dep判断

func (*NilDep) Valid

func (n *NilDep) Valid(ctx context.Context) error

type Option

type Option func(*Options)

func Expiration

func Expiration(t time.Duration) Option

func WithDepend

func WithDepend(depend Depend) Option

func WithKeyDepend

func WithKeyDepend(store Cache, key string) Option

type Options

type Options struct {
	Expiration time.Duration
	Depend     Depend
}

func NewOptions

func NewOptions(opts ...Option) *Options

type Value

type Value interface {
	Result() (string, error)
	Err() error
	Scan(v interface{}) error
	Bytes() ([]byte, error)
	Int64() (int64, error)
	Bool() (bool, error)
}

func NewValue

func NewValue(ctx context.Context, data string, options *Options, err ...error) Value