Exemple #1
0
func (c *Cache) worker(exitChan chan bool) {
	var values *points.Points
	var sendTo chan *points.Points
	var forceReceive bool

	forceReceiveThreshold := cap(c.inputChan) / 10

	ticker := time.NewTicker(c.metricInterval)
	defer ticker.Stop()

MAIN_LOOP:
	for {

		if len(c.inputChan) > forceReceiveThreshold {
			forceReceive = true
		} else {
			forceReceive = false
		}

		if values == nil && !forceReceive {
			values = c.Pop()
		}

		if values != nil {
			sendTo = c.outputChan
		} else {
			sendTo = nil
		}

		select {
		case <-ticker.C: // checkpoint
			c.doCheckpoint()
		case query := <-c.queryChan: // carbonlink
			c.queryCnt++
			reply := NewReply()

			if values != nil && values.Metric == query.Metric {
				reply.Points = values.Copy()
			} else if v, ok := c.data[query.Metric]; ok {
				reply.Points = v.Copy()
			}

			query.ReplyChan <- reply
		case sendTo <- values: // to persister
			values = nil
		case msg := <-c.inputChan: // from receiver
			if c.maxSize == 0 || c.size < c.maxSize {
				c.Add(msg)
			} else {
				c.overflowCnt++
			}
		case <-exitChan: // exit
			break MAIN_LOOP
		}
	}

}
Exemple #2
0
func (test *udpTestCase) Eq(a *points.Points, b *points.Points) {
	if !a.Eq(b) {
		test.Fatalf("%#v != %#v", a, b)
	}
}