cacheflight

package

v0.0.9 Latest Latest Go to latest Published: Dec 26, 2024 License: GPL-3.0 Imports: 5 Imported by: 0

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const (
	DefaultCacheDirty      = time.Minute * 5
	DefaultCacheExpiration = time.Minute * 1
)

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var ErrUnmodified = errors.New("cacheflight: unmodified")

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type Fn func() (val interface{}, err error)

type FnHijack func(oldVal interface{}, oldErr error) (val interface{}, err error)

sometimes you may need the oldVal to do logic. eg. consider a case like http 304(Not modified), server is told the oldVal's hash to decide if it's modified

type Group struct {
	// contains filtered or unexported fields
}

func New(cacheExpiration, cacheDirty time.Duration) *Group

func (g *Group) Do(key string, fn Fn) (interface{}, error)

func (g *Group) DoWithCondition(key string, fn Fn, shouldCache ShouldCache) (interface{}, error)

func (g *Group) HijackDo(key string, fn FnHijack) (interface{}, error)

func (g *Group) HijackDoWithCondition(key string, fn FnHijack, shouldCache ShouldCache) (interface{}, error)

func (g *Group) NoSingleFlight() *Group

type ShouldCache func(val interface{}, err error) (bCache bool, expire, dirty time.Duration)