Merge pull request #239339 from TheovanKraay/patch-46

Update index-metrics.md add java sample

Author: prmerger-automator[bot]

articles/cosmos-db/nosql/index-metrics.md

@@ -21,7 +21,7 @@ Azure Cosmos DB provides indexing metrics to show both utilized indexed paths an
 
 You can enable indexing metrics for a query by setting the `PopulateIndexMetrics` property to `true`. When not specified, `PopulateIndexMetrics` defaults to `false`. We only recommend enabling the index metrics for troubleshooting query performance. As long as your queries and indexing policy stay the same, the index metrics are unlikely to change. Instead, we recommend identifying expensive queries by monitoring query RU charge and latency using diagnostic logs.
 
-### .NET SDK example
+## [.NET SDK](#tab/dotnet)
 
 ```csharp
     string sqlQueryText = "SELECT TOP 10 c.id FROM c WHERE c.Item = 'value1234' AND c.Price > 2";
@@ -43,6 +43,45 @@ You can enable indexing metrics for a query by setting the `PopulateIndexMetrics
         }
 ```
 
+## [Java SDK Sync](#tab/java-sync)
+
+```java    
+    SqlQuerySpec querySpec = new SqlQuerySpec("SELECT TOP 10 c.id FROM c WHERE c.Item = 'value1234' AND c.Price > 2");
+    CosmosQueryRequestOptions options = new CosmosQueryRequestOptions();
+    options.setIndexMetricsEnabled(true);
+
+    CosmosPagedIterable<JsonNode> items = container.queryItems(querySpec, options, JsonNode.class);
+
+    // Print
+    items.iterableByPage().forEach(itemResponse -> {
+        logger.info("diagnostics: {}", itemResponse.getCosmosDiagnostics());
+        for (JsonNode item : itemResponse.getResults()) {
+            logger.info("Item: {}", item.toString());
+        }
+    });  
+```
+
+## [Java SDK Async](#tab/java-async)
+
+```java    
+    SqlQuerySpec querySpec = new SqlQuerySpec("SELECT TOP 10 c.id FROM c WHERE c.Item = 'value1234' AND c.Price > 2");
+    CosmosQueryRequestOptions options = new CosmosQueryRequestOptions();
+    options.setIndexMetricsEnabled(true);
+
+    CosmosPagedFlux<JsonNode> items = container.queryItems(querySpec, options, JsonNode.class);
+    
+    // Print
+    items.byPage(100).flatMap(itemsResponse -> {
+        logger.info("diagnostics: {}",itemsResponse.getCosmosDiagnostics());
+        for (JsonNode item : itemsResponse.getResults()) {
+            logger.info("Item: {}", item.toString());
+        }
+        executeCountQueryPrintSingleResultNumber.incrementAndGet();
+        return Flux.just(itemsResponse);
+    }).blockLast();   
+```
+---
+
 ### Example output
 
 In this example query, we observe the utilized paths `/Item/?` and `/Price/?` and the potential composite indexes `(/Item ASC, /Price ASC)`.