zhtaoxiang commented on code in PR #10104:
URL: https://github.com/apache/pinot/pull/10104#discussion_r1068778919
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pinot-common/src/main/java/org/apache/pinot/common/metrics/AbstractMetrics.java:
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@@ -707,15 +708,16 @@ public void removeTableGauge(final String tableName,
final G gauge) {
/**
+ * @deprecated please use removeTableGauge(final String tableName, final
String key, final G gauge) instead
+ *
* Removes a table gauge given the table name and the gauge.
* The add/remove is expected to work correctly in case of being invoked
across multiple threads.
* @param tableName table name
+ * @param partitionId The partition id
* @param gauge the gauge to be removed
*/
public void removePartitionGauge(final String tableName, final int
partitionId, final G gauge) {
Review Comment:
Let me break it down into details:
1. The last parameter of this method is not a `callback` but rather a
callable, so I'd like to remove `callback` from the method name. `Callback`
normally means it will tell the caller something.
2. The guard is actually not needed, `addCallbackGauge` itself will only add
the gauge once, following calls cannot update it (I tested it and find this
behavior, that's why I added updatable gauge in another PR
https://github.com/apache/pinot/pull/9961). I have a plan to remove
`_gaugeValues` entirely.
3. Can you please help me understand why we only need to add the gauge for
the first time? I see only one usage, and it seems that it's okay to update the
existing gauge.
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