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ctrl.go
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ctrl.go
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/*
Copyright NetFoundry Inc.
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
https://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 env
import (
"github.com/openziti/foundation/v2/versions"
"sync/atomic"
"time"
"github.com/openziti/channel/v2"
)
type NetworkController interface {
Channel() channel.Channel
Address() string
Latency() time.Duration
HeartbeatCallback() channel.HeartbeatCallback
IsUnresponsive() bool
isMoreResponsive(other NetworkController) bool
GetVersion() *versions.VersionInfo
TimeSinceLastContact() time.Duration
}
type networkCtrl struct {
ch channel.Channel
address string
heartbeatOptions *HeartbeatOptions
lastTx int64
lastRx int64
latency atomic.Int64
unresponsive atomic.Bool
versionInfo *versions.VersionInfo
lastContact atomic.Int64
}
func (self *networkCtrl) TimeSinceLastContact() time.Duration {
return time.Millisecond * time.Duration(time.Now().UnixMilli()-self.lastContact.Load())
}
func (self *networkCtrl) HeartbeatCallback() channel.HeartbeatCallback {
return self
}
func (self *networkCtrl) Channel() channel.Channel {
return self.ch
}
func (self *networkCtrl) GetVersion() *versions.VersionInfo {
return self.versionInfo
}
func (self *networkCtrl) Address() string {
return self.address
}
func (self *networkCtrl) Latency() time.Duration {
return time.Duration(self.latency.Load())
}
func (self *networkCtrl) IsUnresponsive() bool {
return self.unresponsive.Load()
}
func (self *networkCtrl) isMoreResponsive(other NetworkController) bool {
if self.IsUnresponsive() {
if !other.IsUnresponsive() {
return false
}
} else if other.IsUnresponsive() {
return true
}
return self.Latency() < other.Latency()
}
func (self *networkCtrl) HeartbeatTx(int64) {
self.lastTx = time.Now().UnixMilli()
self.lastContact.Store(self.lastTx)
}
func (self *networkCtrl) HeartbeatRx(int64) {
}
func (self *networkCtrl) HeartbeatRespTx(int64) {
}
func (self *networkCtrl) HeartbeatRespRx(ts int64) {
now := time.Now()
self.lastRx = now.UnixMilli()
self.latency.Store(now.UnixNano() - ts)
self.lastContact.Store(self.lastRx)
}
func (self *networkCtrl) CheckHeartBeat() {
if time.Duration(self.latency.Load()) > self.heartbeatOptions.UnresponsiveAfter {
// if latency is greater than 5 seconds, consider this channel unresponsive
self.unresponsive.Store(true)
} else if self.lastTx > 0 && self.lastRx < self.lastTx && (time.Now().UnixMilli()-self.lastTx) > 5000 {
// if we've sent a heartbeat and not gotten a response in over 5s, consider ourselves unresponsive
self.unresponsive.Store(true)
} else {
self.unresponsive.Store(false)
}
}
func NewDefaultHeartbeatOptions() *HeartbeatOptions {
return &HeartbeatOptions{
HeartbeatOptions: *channel.DefaultHeartbeatOptions(),
UnresponsiveAfter: 5 * time.Second,
}
}
func NewHeartbeatOptions(options *channel.HeartbeatOptions) (*HeartbeatOptions, error) {
unresponsiveAfter, err := options.GetDuration("unresponsiveAfter")
if err != nil {
return nil, err
}
result := NewDefaultHeartbeatOptions()
result.HeartbeatOptions = *options
if unresponsiveAfter != nil {
result.UnresponsiveAfter = *unresponsiveAfter
}
return result, nil
}
type HeartbeatOptions struct {
channel.HeartbeatOptions
UnresponsiveAfter time.Duration
}