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