junrao commented on code in PR #13391:
URL: https://github.com/apache/kafka/pull/13391#discussion_r1163446164
##########
core/src/main/scala/kafka/server/KafkaRequestHandler.scala:
##########
@@ -69,20 +108,52 @@ class KafkaRequestHandler(id: Int,
completeShutdown()
return
+ case callback: RequestChannel.CallbackRequest =>
+ try {
+ val originalRequest = callback.originalRequest
+
+ // If we've already executed a callback for this request, reset
the times and subtract the callback time from the
+ // new dequeue time. This will allow calculation of multiple
callback times.
+ // Otherwise, set dequeue time to now.
+ if (originalRequest.callbackRequestDequeueTimeNanos.isDefined) {
+ val prevCallbacksTimeNanos =
originalRequest.callbackRequestCompleteTimeNanos.getOrElse(0L) -
originalRequest.callbackRequestDequeueTimeNanos.getOrElse(0L)
+ originalRequest.callbackRequestCompleteTimeNanos = None
+ originalRequest.callbackRequestDequeueTimeNanos =
Some(time.nanoseconds() - prevCallbacksTimeNanos)
+ } else {
+ originalRequest.callbackRequestDequeueTimeNanos =
Some(time.nanoseconds())
+ }
+
+ currentRequest.set(originalRequest)
+ callback.fun()
+ if (originalRequest.callbackRequestCompleteTimeNanos.isEmpty)
Review Comment:
I am still a bit confused on this.
case a - only 1 callback. In this case, callbackRequestCompleteTimeNanos is
never set and is expected to be empty.
case b - multiple callbacks. In this case, after the first callback,
callbackRequestDequeueTimeNanos is set. So, when the 2nd callback is processed,
we set callbackRequestCompleteTimeNanos to empty before executing the callback.
When we get here, callbackRequestCompleteTimeNanos is expected to be empty.
So, it seems that in both case a and b, we expect
callbackRequestCompleteTimeNanos to be empty?
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