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heartbeater.go
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heartbeater.go
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// Copyright 2021 Matrix Origin
//
// 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 ops
import (
"context"
"sync"
"time"
"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/tasks/worker/base"
)
type lamdaHandle struct {
onExec func()
onStop func()
}
func (h *lamdaHandle) OnExec() {
if h.onExec != nil {
h.onExec()
}
}
func (h *lamdaHandle) OnStopped() {
if h.onStop != nil {
h.onStop()
}
}
type heartbeater struct {
handle base.IHBHandle
interval time.Duration
ctx context.Context
cancel context.CancelFunc
wg *sync.WaitGroup
}
func NewHeartBeaterWithFunc(interval time.Duration, onExec, onStop func()) *heartbeater {
h := &lamdaHandle{onExec: onExec, onStop: onStop}
return NewHeartBeater(interval, h)
}
func NewHeartBeater(interval time.Duration, handle base.IHBHandle) *heartbeater {
c := &heartbeater{
interval: interval,
handle: handle,
}
c.ctx, c.cancel = context.WithCancel(context.Background())
return c
}
func (c *heartbeater) Start() {
c.wg = &sync.WaitGroup{}
c.wg.Add(1)
go func() {
defer c.wg.Done()
ticker := time.NewTicker(c.interval)
for {
select {
case <-c.ctx.Done():
ticker.Stop()
return
case <-ticker.C:
c.handle.OnExec()
}
}
}()
}
func (c *heartbeater) Stop() {
c.cancel()
c.wg.Wait()
c.handle.OnStopped()
}