mimaison commented on code in PR #12045:
URL: https://github.com/apache/kafka/pull/12045#discussion_r862834421
##########
clients/src/main/java/org/apache/kafka/common/metrics/stats/SampledStat.java:
##########
@@ -110,25 +127,40 @@ public String toString() {
protected void purgeObsoleteSamples(MetricConfig config, long now) {
long expireAge = config.samples() * config.timeWindowMs();
for (Sample sample : samples) {
- if (now - sample.lastWindowMs >= expireAge)
+ if (now - sample.getLastWindowMs() >= expireAge)
sample.reset(now);
}
}
protected static class Sample {
- public double initialValue;
- public long eventCount;
- public long lastWindowMs;
- public double value;
+ private double initialValue;
Review Comment:
This is also part of the public API, so we shouldn't be changing these fields
##########
clients/src/main/java/org/apache/kafka/common/metrics/stats/SampledStat.java:
##########
@@ -138,6 +170,46 @@ public boolean isComplete(long timeMs, MetricConfig
config) {
return timeMs - lastWindowMs >= config.timeWindowMs() ||
eventCount >= config.eventWindow();
}
+ public boolean isActive() {
Review Comment:
Again because it's public API we can't add new public methods without having
a KIP
##########
clients/src/main/java/org/apache/kafka/common/metrics/stats/Rate.java:
##########
@@ -52,10 +51,6 @@ public Rate(TimeUnit unit, SampledStat stat) {
this.unit = unit;
}
- public String unitName() {
Review Comment:
`Rate` is part of the public API
(https://kafka.apache.org/31/javadoc/org/apache/kafka/common/metrics/stats/Rate.html)
so we don't want to remove this method.
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