1 files changed, 41 insertions, 0 deletions
diff --git a/zkfacade/src/main/java/com/yahoo/vespa/curator/stats/DurationSum.java b/zkfacade/src/main/java/com/yahoo/vespa/curator/stats/DurationSum.java
new file mode 100644
index 00000000000..3c1f0ec7f43
--- /dev/null
+++ b/zkfacade/src/main/java/com/yahoo/vespa/curator/stats/DurationSum.java
@@ -0,0 +1,41 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.curator.stats;
+
+import java.time.Duration;
+import java.util.Optional;
+
+/**
+ * Represents a sum and count of Duration.
+ *
+ * @author hakon
+ */
+public class DurationSum {
+
+    private final Duration duration;
+    private final int count;
+
+    DurationSum(Duration duration, int count) {
+        this.duration = duration;
+        this.count = count;
+    }
+
+    public Duration duration() { return duration; }
+    public int count() { return count; }
+
+    public Optional<Duration> averageDuration() {
+        if (count <= 0) {
+            return Optional.empty();
+        }
+
+        long averageMillis = Math.round(duration.toMillis() / (double) count);
+        return Optional.of(Duration.ofMillis(averageMillis));
+    }
+
+    @Override
+    public String toString() {
+        return "DurationSum{" +
+                "duration=" + duration +
+                ", count=" + count +
+                '}';
+    }
+}