1u0 commented on a change in pull request #9870: [FLINK-14350][metrics]
Introduce dedicated MetricScope
URL: https://github.com/apache/flink/pull/9870#discussion_r333877706
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/groups/FrontMetricGroup.java
##########
@@ -30,28 +34,54 @@
*/
public class FrontMetricGroup<P extends AbstractMetricGroup<?>> extends
ProxyMetricGroup<P> {
- protected int reporterIndex;
+ private final ReporterIndexInjectingMetricScope scope;
public FrontMetricGroup(int reporterIndex, P reference) {
super(reference);
- this.reporterIndex = reporterIndex;
+ this.scope = new
ReporterIndexInjectingMetricScope(reporterIndex,
this.parentMetricGroup.getScope());
}
@Override
public String getMetricIdentifier(String metricName) {
- return parentMetricGroup.getMetricIdentifier(metricName, null,
this.reporterIndex);
+ return scope.getMetricIdentifier(metricName);
}
@Override
public String getMetricIdentifier(String metricName, CharacterFilter
filter) {
- return parentMetricGroup.getMetricIdentifier(metricName,
filter, this.reporterIndex);
+ return scope.getMetricIdentifier(metricName, filter);
}
public String getLogicalScope(CharacterFilter filter) {
return parentMetricGroup.getLogicalScope(filter);
}
public String getLogicalScope(CharacterFilter filter, char delimiter) {
- return parentMetricGroup.getLogicalScope(filter, delimiter,
this.reporterIndex);
+ return parentMetricGroup.getLogicalScope(filter, delimiter);
Review comment:
**NB:** If I understand correctly, without `reporterIndex`, you are making
this call non cached.
This would impact InfluxDB, Jmx and Prometheus reporters.
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