/
keepsafe.go
50 lines (44 loc) · 1009 Bytes
/
keepsafe.go
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package destination
import (
"sync"
"time"
)
type keepSafe struct {
initialCap int
safeOld [][]byte
safeRecent [][]byte
periodKeep time.Duration // period to keep at least. you get this period + a bit more
sync.Mutex
}
func NewKeepSafe(initialCap int, periodKeep time.Duration) *keepSafe {
k := keepSafe{
initialCap: initialCap,
safeOld: make([][]byte, 0, initialCap),
safeRecent: make([][]byte, 0, initialCap),
periodKeep: periodKeep,
}
go k.keepClean()
return &k
}
func (k *keepSafe) keepClean() {
tick := time.NewTicker(k.periodKeep)
for range tick.C {
k.Lock()
k.safeOld = k.safeRecent
k.safeRecent = make([][]byte, 0, k.initialCap)
k.Unlock()
}
}
func (k *keepSafe) Add(buf []byte) {
k.Lock()
k.safeRecent = append(k.safeRecent, buf)
k.Unlock()
}
func (k *keepSafe) GetAll() [][]byte {
k.Lock()
ret := append(k.safeOld, k.safeRecent...)
k.safeOld = make([][]byte, 0, k.initialCap)
k.safeRecent = make([][]byte, 0, k.initialCap)
k.Unlock()
return ret
}