Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
var ( // ErrServiceOverloaded is returned by Shedder.Allow when the service is overloaded. ErrServiceOverloaded = errors.New("service overloaded") )
Functions ¶
Types ¶
type Promise ¶
type Promise interface {
// Pass lets the caller tell that the call is successful.
Pass()
// Fail lets the caller tell that the call is failed.
Fail()
}
A Promise interface is returned by Shedder.Allow to let callers tell whether the processing request is successful or not.
type Shedder ¶
type Shedder interface {
// Allow returns the Promise if allowed, otherwise ErrServiceOverloaded.
Allow() (Promise, error)
}
Shedder is the interface that wraps the Allow method.
func NewAdaptiveShedder ¶
func NewAdaptiveShedder(opts ...ShedderOption) Shedder
NewAdaptiveShedder returns an adaptive shedder. opts can be used to customize the Shedder.
type ShedderGroup ¶
type ShedderGroup struct {
// contains filtered or unexported fields
}
A ShedderGroup is a manager to manage key-based shedders.
func NewShedderGroup ¶
func NewShedderGroup(opts ...ShedderOption) *ShedderGroup
NewShedderGroup returns a ShedderGroup.
func (*ShedderGroup) GetShedder ¶
func (g *ShedderGroup) GetShedder(key string) Shedder
GetShedder gets the Shedder for the given key.
type ShedderOption ¶
type ShedderOption func(opts *shedderOptions)
ShedderOption lets caller customize the Shedder.
func WithBuckets ¶
func WithBuckets(buckets int) ShedderOption
WithBuckets customizes the Shedder with the given number of buckets.
func WithCpuThreshold ¶
func WithCpuThreshold(threshold int64) ShedderOption
WithCpuThreshold customizes the Shedder with the given cpu threshold.
func WithWindow ¶
func WithWindow(window time.Duration) ShedderOption
WithWindow customizes the Shedder with given
type SheddingStat ¶
type SheddingStat struct {
// contains filtered or unexported fields
}
A SheddingStat is used to store the statistics for load shedding.
func NewSheddingStat ¶
func NewSheddingStat(name string) *SheddingStat
NewSheddingStat returns a SheddingStat.
func (*SheddingStat) IncrementDrop ¶
func (s *SheddingStat) IncrementDrop()
IncrementDrop increments the dropped requests.
func (*SheddingStat) IncrementPass ¶
func (s *SheddingStat) IncrementPass()
IncrementPass increments the passed requests.
func (*SheddingStat) IncrementTotal ¶
func (s *SheddingStat) IncrementTotal()
IncrementTotal increments the total requests.
Source Files