Fix: updates Counter to AtomicInteger

Signed-off-by: Bhumika Sharma <[email protected]>

Author: Bhumika Sharma

server/src/test/java/org/opensearch/telemetry/TestInMemoryCounter.java

@@ -13,7 +13,7 @@
 
 import java.util.HashMap;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.atomic.AtomicReference;
+import java.util.concurrent.atomic.AtomicInteger;
 
 /**
  * This is a simple implementation of Counter which is utilized by TestInMemoryMetricsRegistry for
@@ -23,11 +23,11 @@
  */
 public class TestInMemoryCounter implements Counter {
 
-    private AtomicReference<Double> counterValue = new AtomicReference<Double>(0.0);
+    private AtomicInteger counterValue = new AtomicInteger(0);
     private ConcurrentHashMap<HashMap<String, ?>, Double> counterValueForTags = new ConcurrentHashMap<>();
 
     public Double getCounterValue() {
-        return this.counterValue.get();
+        return (double) this.counterValue.get();
     }
 
     public ConcurrentHashMap<HashMap<String, ?>, Double> getCounterValueForTags() {
@@ -37,7 +37,7 @@ public Double getCounterValue() {
     @Override
     public void add(double value) {
         double oldValue = counterValue.get();
-        counterValue.set(oldValue + value);
+        counterValue.set((int) (oldValue + value));
     }
 
     @Override