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counts.go
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counts.go
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package circuit
import (
"sync/atomic"
"time"
)
type Bucket struct {
lastAccess int64
timeout time.Duration
failure int64
success int64
}
func NewBucket(timeout int64) *Bucket {
expire := time.Duration(timeout) * time.Second
return &Bucket{
failure: 0,
success: 0,
lastAccess: time.Now().UnixNano(),
timeout: expire,
}
}
func (b *Bucket) Reset() {
atomic.StoreInt64(&b.failure, 0)
atomic.StoreInt64(&b.success, 0)
}
func (b *Bucket) Fail() {
b.State()
atomic.AddInt64(&b.failure, 1)
}
func (b *Bucket) Success() {
b.State()
atomic.AddInt64(&b.success, 1)
}
func (b *Bucket) ErrorRate() float64 {
failure := atomic.LoadInt64(&b.failure)
success := atomic.LoadInt64(&b.success)
total := failure + success
if total == 0 {
return 0.0
}
return float64(failure) / float64(total)
}
func (b *Bucket) State() {
elpased := time.Now().UnixNano() - b.lastAccess
if elpased > b.timeout.Nanoseconds() {
b.Reset()
}
b.lastAccess = time.Now().UnixNano()
}
func (b *Bucket) Failures() int64 {
return atomic.LoadInt64(&b.failure)
}
func (b *Bucket) Successes() int64 {
return atomic.LoadInt64(&b.success)
}