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errors_batch.go
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/
errors_batch.go
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package cony
import (
"fmt"
"math/big"
"sync"
"time"
)
type ErrorsBatchSnapshot struct {
Errors []error
ErrorsLen int
First *time.Time
Last *time.Time
LastReset *time.Time
}
type ErrorsBatch struct {
errors []error
first *time.Time
last *time.Time
lastReset *time.Time
mu sync.RWMutex
}
func NewErrorBatch() *ErrorsBatch {
return &ErrorsBatch{}
}
func (eb *ErrorsBatch) Len() int {
eb.mu.RLock()
defer eb.mu.RUnlock()
return len(eb.errors)
}
func (eb *ErrorsBatch) Errors() []error {
eb.mu.RLock()
defer eb.mu.RUnlock()
return eb.errors
}
func (eb *ErrorsBatch) First() *time.Time {
eb.mu.RLock()
defer eb.mu.RUnlock()
return eb.first
}
func (eb *ErrorsBatch) Last() *time.Time {
eb.mu.RLock()
defer eb.mu.RUnlock()
return eb.last
}
func (eb *ErrorsBatch) Add(err error) {
now := time.Now()
eb.mu.Lock()
defer eb.mu.Unlock()
if eb.first == nil {
eb.first = &now
}
eb.errors = append(eb.errors, err)
eb.last = &now
}
func (eb *ErrorsBatch) Reset() {
eb.mu.Lock()
defer eb.mu.Unlock()
eb.first = nil
eb.last = nil
eb.errors = nil
now := time.Now()
eb.lastReset = &now
}
func (eb *ErrorsBatch) Snapshot() *ErrorsBatchSnapshot {
eb.mu.RLock()
defer eb.mu.RUnlock()
return &ErrorsBatchSnapshot{
Errors: eb.errors,
ErrorsLen: len(eb.errors),
First: eb.first,
Last: eb.last,
LastReset: eb.lastReset,
}
}
func (eb *ErrorsBatch) String() string {
eb.mu.RLock()
defer eb.mu.RUnlock()
return fmt.Sprintf("ErrorsBatch[First: %s, Last: %s, ErrorsLen: %d, LastReset: %s, Errors: %v]", eb.first, eb.last, len(eb.errors), eb.lastReset, eb.errors)
}
// EPS - errors per second
// CheckEPS takes wanted coefficient and returns if
// current ErrorsBatch eps coefficient grater that given coefficient
func (eb *ErrorsBatch) CheckEPS(k float64) bool {
eb.mu.RLock()
defer eb.mu.RUnlock()
if eb.last.Unix()-eb.first.Unix() <= 0 {
return false
}
curEPS := new(big.Float).Quo(big.NewFloat(float64(len(eb.errors))), big.NewFloat(float64(eb.last.Unix()-eb.first.Unix()))).SetPrec(5)
// curEPS >= k
return curEPS.Cmp(big.NewFloat(k)) >= 0
}
// EPS - errors per second
// GetEPS returns current ErrorsBatch eps coefficient
func (eb *ErrorsBatch) GetEPS() float64 {
eb.mu.RLock()
defer eb.mu.RUnlock()
if eb.last.Unix()-eb.first.Unix() <= 0 {
return 0
}
curEPS := new(big.Float).Quo(big.NewFloat(float64(len(eb.errors))), big.NewFloat(float64(eb.last.Unix()-eb.first.Unix()))).SetPrec(5)
k, _ := curEPS.Float64()
return k
}