apoorvmittal10 commented on code in PR #15251:
URL: https://github.com/apache/kafka/pull/15251#discussion_r1469835995
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server/src/main/java/org/apache/kafka/server/ClientMetricsManager.java:
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@@ -493,4 +519,123 @@ public void run() {
}
}
}
+
+ // Visible for testing
+ final class ClientMetricsStats {
+
+ private static final String GROUP_NAME = "ClientMetrics";
+
+ // Visible for testing
+ static final String INSTANCE_COUNT = "ClientMetricsInstanceCount";
+ static final String UNKNOWN_SUBSCRIPTION_REQUEST =
"ClientMetricsUnknownSubscriptionRequest";
+ static final String THROTTLE = "ClientMetricsThrottle";
+ static final String PLUGIN_EXPORT = "ClientMetricsPluginExport";
+ static final String PLUGIN_ERROR = "ClientMetricsPluginError";
+ static final String PLUGIN_EXPORT_TIME =
"ClientMetricsPluginExportTime";
+
+ // Names of sensors that are registered through client instances.
+ private final Set<String> sensorsName = ConcurrentHashMap.newKeySet();
+ // List of metric names which are not specific to a client instance.
Do not require thread
+ // safe structure as it will be populated only in constructor.
+ private final List<MetricName> registeredMetricNames = new
ArrayList<>();
+
+ private final Set<String> instanceMetrics =
Stream.of(UNKNOWN_SUBSCRIPTION_REQUEST,
+ THROTTLE, PLUGIN_EXPORT, PLUGIN_ERROR,
PLUGIN_EXPORT_TIME).collect(Collectors.toSet());
+
+ ClientMetricsStats() {
+ Measurable instanceCount = (config, now) ->
clientInstanceCache.size();
+ MetricName instanceCountMetric =
metrics.metricName(INSTANCE_COUNT, GROUP_NAME,
+ "The current number of client metric instances being managed
by the broker");
Review Comment:
Done.
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