Log query shape if trace log enabled

Signed-off-by: Siddhant Deshmukh <deshsid@amazon.com>

Author: deshsidd

src/main/java/org/opensearch/plugin/insights/core/listener/QueryInsightsListener.java

@@ -272,14 +272,25 @@ private void constructSearchQueryRecord(final SearchPhaseContext context, final
             attributes.put(Attribute.PHASE_LATENCY_MAP, searchRequestContext.phaseTookMap());
             attributes.put(Attribute.TASK_RESOURCE_USAGES, tasksResourceUsages);
 
-            if (queryInsightsService.isGroupingEnabled()) {
-                String hashcode = queryShapeGenerator.getShapeHashCodeAsString(
+            if (queryInsightsService.isGroupingEnabled() || log.isTraceEnabled()) {
+                // Generate the query shape only if grouping is enabled or trace logging is enabled
+                String queryShape = queryShapeGenerator.buildShape(
                     request.source(),
                     groupingFieldNameEnabled,
                     groupingFieldTypeEnabled,
                     searchRequestContext.getSuccessfulSearchShardIndices()
                 );
-                attributes.put(Attribute.QUERY_HASHCODE, hashcode);
+
+                // Print the query shape if tracer is enabled
+                if (log.isTraceEnabled()) {
+                    log.trace("Query Shape: {}", queryShape);
+                }
+
+                // Add hashcode attribute when grouping is enabled
+                if (queryInsightsService.isGroupingEnabled()) {
+                    String hashcode = queryShapeGenerator.getShapeHashCodeAsString(queryShape);
+                    attributes.put(Attribute.QUERY_HASHCODE, hashcode);
+                }
             }
 
             Map<String, Object> labels = new HashMap<>();

src/main/java/org/opensearch/plugin/insights/core/service/categorizer/QueryShapeGenerator.java

@@ -87,6 +87,18 @@ public String getShapeHashCodeAsString(
         return hashAsString;
     }
 
+    /**
+     * Gets the hash code of the query shape as a string.
+     *
+     * @param queryShape            query shape as input
+     * @return Hash code of the query shape as a string
+     */
+    public String getShapeHashCodeAsString(String queryShape) {
+        final BytesRef shapeBytes = new BytesRef(queryShape);
+        MurmurHash3.Hash128 hashcode = MurmurHash3.hash128(shapeBytes.bytes, 0, shapeBytes.length, 0, new MurmurHash3.Hash128());
+        return Long.toHexString(hashcode.h1) + Long.toHexString(hashcode.h2);
+    }
+
     /**
      * Builds the search query shape given a source.
      *