Unify on using the MetricId class to avoid creating many instances on the fly.

1 files changed, 2 insertions, 3 deletions

diff --git a/metrics-proxy/src/main/java/ai/vespa/metricsproxy/metric/model/MetricId.java b/metrics-proxy/src/main/java/ai/vespa/metricsproxy/metric/model/MetricId.java
index 9be67607d4d..dcee4100f98 100644
--- a/metrics-proxy/src/main/java/ai/vespa/metricsproxy/metric/model/MetricId.java
+++ b/metrics-proxy/src/main/java/ai/vespa/metricsproxy/metric/model/MetricId.java
@@ -8,6 +8,7 @@ import java.util.Objects;
  */
 public class MetricId {
 
+    public static final MetricId empty = toMetricId("");
     public final String id;
     private MetricId(String id) { this.id = id; }
 
@@ -28,9 +29,7 @@ public class MetricId {
 
     @Override
     public String toString() {
-        return "MetricId{" +
-                "id='" + id + '\'' +
-                '}';
+        return id;
     }
 
 }