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71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package middleware
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import (
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"git.noahlan.cn/noahlan/nnet"
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"git.noahlan.cn/noahlan/nnet/conn"
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"git.noahlan.cn/noahlan/nnet/event"
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"git.noahlan.cn/noahlan/nnet/packet"
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rt "git.noahlan.cn/noahlan/nnet/router"
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"git.noahlan.cn/noahlan/ntool/nlog"
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"sync/atomic"
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"time"
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)
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type HeartbeatMiddleware struct {
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lastAt int64
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interval time.Duration
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hbdFn func(conn *conn.Connection) []byte
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}
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func WithHeartbeat(interval time.Duration, hbdFn func(conn *conn.Connection) []byte) nnet.RunOption {
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m := &HeartbeatMiddleware{
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lastAt: time.Now().Unix(),
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interval: interval,
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hbdFn: hbdFn,
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}
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if hbdFn == nil {
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nlog.Error("dataFn must not be nil")
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panic("dataFn must not be nil")
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}
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return func(ngin *nnet.Engine) {
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ngin.EventManager().RegisterEvent(event.EvtOnConnected, m.start)
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ngin.Use(func(next rt.HandlerFunc) rt.HandlerFunc {
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return func(conn *conn.Connection, pkg packet.IPacket) {
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m.handle(conn, pkg)
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next(conn, pkg)
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}
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})
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}
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}
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func (m *HeartbeatMiddleware) start(conn *conn.Connection) {
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ticker := time.NewTicker(m.interval)
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defer func() {
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ticker.Stop()
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}()
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for {
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select {
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case <-ticker.C:
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deadline := time.Now().Add(-2 * m.interval).Unix()
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if atomic.LoadInt64(&m.lastAt) < deadline {
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nlog.Errorf("Heartbeat timeout, LastTime=%d, Deadline=%d", atomic.LoadInt64(&m.lastAt), deadline)
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return
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}
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err := conn.SendBytes(m.hbdFn(conn))
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if err != nil {
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nlog.Errorf("Heartbeat err: %v", err)
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return
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}
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}
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}
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}
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func (m *HeartbeatMiddleware) handle(_ *conn.Connection, _ packet.IPacket) {
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atomic.StoreInt64(&m.lastAt, time.Now().Unix())
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}
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