/
time_adjust.go
81 lines (72 loc) · 1.99 KB
/
time_adjust.go
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/**
* Tencent is pleased to support the open source community by making Polaris available.
*
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
*
* Licensed under the BSD 3-Clause License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package healthcheck
import (
"context"
"sync/atomic"
"time"
"github.com/polarismesh/polaris/store"
)
const adjustInterval = 60 * time.Second
// TimeAdjuster adjust the seconds from databases
type TimeAdjuster struct {
diff int64
storage store.Store
}
func newTimeAdjuster(ctx context.Context, storage store.Store) *TimeAdjuster {
adjuster := &TimeAdjuster{storage: storage}
return adjuster
}
func (t *TimeAdjuster) doTimeAdjust(ctx context.Context) {
go func() {
t.calcDiff()
ticker := time.NewTicker(adjustInterval)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
log.Infof("[Health Check] time adjuster has been stopped")
return
case <-ticker.C:
t.calcDiff()
}
}
}()
}
func (t *TimeAdjuster) calcDiff() {
curTimeSecond, err := t.storage.GetUnixSecond(time.Second)
if err != nil {
log.Errorf("[Health Check] fail to get now from store, err is %s", err.Error())
return
}
if curTimeSecond == 0 {
return
}
sysNow := time.Now().Unix()
diff := sysNow - curTimeSecond
if diff != 0 {
log.Infof("[Health Check] time diff from now is %d", diff)
}
atomic.StoreInt64(&t.diff, diff)
}
// GetDiff get diff time between store and current PC
func (t *TimeAdjuster) GetDiff() int64 {
if nil == t {
return 0
}
return atomic.LoadInt64(&t.diff)
}