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// Copyright 2018 HenryLee. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// 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 heartbeat
import (
"sync"
"time"
"github.com/henrylee2cn/goutil"
"github.com/henrylee2cn/goutil/coarsetime"
)
type swapKey byte
const (
heartbeatSwapKey swapKey = 0
minRateSecond = 3
)
// heartbeatInfo heartbeat info
type heartbeatInfo struct {
// heartbeat rate
rate time.Duration
// last heartbeat time
last time.Time
mu sync.RWMutex
}
func (h *heartbeatInfo) elemCopy() heartbeatInfo {
h.mu.RLock()
copy := heartbeatInfo{
rate: h.rate,
last: h.last,
}
h.mu.RUnlock()
return copy
}
func (h *heartbeatInfo) getRate() time.Duration {
h.mu.RLock()
rate := h.rate
h.mu.RUnlock()
return rate
}
func (h *heartbeatInfo) getLast() time.Time {
h.mu.RLock()
last := h.last
h.mu.RUnlock()
return last
}
func initHeartbeatInfo(m goutil.Map, rate time.Duration) {
m.Store(heartbeatSwapKey, &heartbeatInfo{
rate: rate,
last: coarsetime.CeilingTimeNow(),
})
}
// getHeartbeatInfo gets heartbeat info from session.
func getHeartbeatInfo(m goutil.Map) (*heartbeatInfo, bool) {
_info, ok := m.Load(heartbeatSwapKey)
if !ok {
return nil, false
}
return _info.(*heartbeatInfo), true
}
// updateHeartbeatInfo updates heartbeat info of session.
func updateHeartbeatInfo(m goutil.Map, rate time.Duration) (isFirst bool) {
info, ok := getHeartbeatInfo(m)
if !ok {
isFirst = true
if rate > 0 {
initHeartbeatInfo(m, rate)
}
return
}
info.mu.Lock()
if rate > 0 {
info.rate = rate
}
info.last = coarsetime.CeilingTimeNow()
info.mu.Unlock()
return
}
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