vcsomor commented on a change in pull request #3032:
URL: https://github.com/apache/hive/pull/3032#discussion_r809413256
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File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/metrics/Metrics.java
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@@ -160,6 +159,47 @@ public Integer getValue() {
}
}
+ /**
+ * Get a Map that represents a multi-field metric,
+ * or create a new one if it does not already exist.
+ * @param name Name of map metric. This should come from MetricConstants
+ * @return MapMetric .
+ */
+ public static MapMetrics getOrCreateMapMetrics(String name) {
+ if (self == null) {
+ return dummyMapMetrics;
+ }
+
+ Map<String, Metric> metrics = self.registry.getMetrics();
+ Metric map = metrics.get(name);
+ if (map instanceof MapMetrics) {
+ return (MapMetrics) map;
+ }
+
+ // Looks like it doesn't exist. Lock so that two threads don't create it
at once.
+ synchronized (Metrics.class) {
+ // Recheck to make sure someone didn't create it while we waited.
Review comment:
ohh sorry I've missed that
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