Method schedule

state.go:122–160

Schedule is used to ensure the Tick is performed periodically. This function is safe to call multiple times. If the memberlist is already scheduled, then it won't do anything.

()

// function is safe to call multiple times. If the memberlist is already
// scheduled, then it won't do anything.
func (m *Memberlist) schedule() {
	m.tickerLock.Lock()
	defer m.tickerLock.Unlock()

	// If we already have tickers, then don't do anything, since we're
	// scheduled
	if len(m.tickers) > 0 {
		return
	}

	// Create the stop tick channel, a blocking channel. We close this
	// when we should stop the tickers.
	stopCh := make(chan struct{})

	// Create a new probeTicker
	if m.config.ProbeInterval > 0 {
		t := time.NewTicker(m.config.ProbeInterval)
		go m.triggerFunc(m.config.ProbeInterval, t.C, stopCh, m.probe)
		m.tickers = append(m.tickers, t)
	}

	// Create a push pull ticker if needed
	if m.config.PushPullInterval > 0 {
		go m.pushPullTrigger(stopCh)
	}

	// Create a gossip ticker if needed
	if m.config.GossipInterval > 0 && m.config.GossipNodes > 0 {
		t := time.NewTicker(m.config.GossipInterval)
		go m.triggerFunc(m.config.GossipInterval, t.C, stopCh, m.gossip)
		m.tickers = append(m.tickers, t)
	}

	// If we made any tickers, then record the stopTick channel for
	// later.
	if len(m.tickers) > 0 {
		m.stopTick = stopCh
	}
}

// triggerFunc is used to trigger a function call each time a
// message is received until a stop tick arrives.