func (t *Topic) AggregateChannelE2eProcessingLatency() *quantile.Quantile {
var latencyStream *quantile.Quantile
for _, c := range t.channelMap {
if c.e2eProcessingLatencyStream == nil {
continue
}
if latencyStream == nil {
latencyStream = quantile.New(
t.ctx.nsqd.opts.E2EProcessingLatencyWindowTime,
t.ctx.nsqd.opts.E2EProcessingLatencyPercentiles)
}
latencyStream.Merge(c.e2eProcessingLatencyStream)
}
return latencyStream
}
// NewChannel creates a new instance of the Channel type and returns a pointer
func NewChannel(topicName string, channelName string, ctx *context,
deleteCallback func(*Channel)) *Channel {
c := &Channel{
topicName: topicName,
name: channelName,
memoryMsgChan: make(chan *Message, ctx.nsqd.opts.MemQueueSize),
clientMsgChan: make(chan *Message),
exitChan: make(chan int),
clients: make(map[int64]Consumer),
deleteCallback: deleteCallback,
ctx: ctx,
}
if len(ctx.nsqd.opts.E2EProcessingLatencyPercentiles) > 0 {
c.e2eProcessingLatencyStream = quantile.New(
ctx.nsqd.opts.E2EProcessingLatencyWindowTime,
ctx.nsqd.opts.E2EProcessingLatencyPercentiles,
)
}
c.initPQ()
if strings.HasSuffix(channelName, "#ephemeral") {
c.ephemeral = true
c.backend = newDummyBackendQueue()
} else {
// backend names, for uniqueness, automatically include the topic...
backendName := getBackendName(topicName, channelName)
c.backend = newDiskQueue(backendName,
ctx.nsqd.opts.DataPath,
ctx.nsqd.opts.MaxBytesPerFile,
ctx.nsqd.opts.SyncEvery,
ctx.nsqd.opts.SyncTimeout,
ctx.nsqd.opts.Logger)
}
go c.messagePump()
c.waitGroup.Wrap(func() { c.deferredWorker() })
c.waitGroup.Wrap(func() { c.inFlightWorker() })
c.ctx.nsqd.Notify(c)
return c
}