update sample

Author: clun

tools/src/main/java/com/datastax/astra/tool/CsvLoaderListing.java

@@ -6,17 +6,15 @@
 import com.datastax.astra.client.model.DataAPIKeywords;
 import com.datastax.astra.client.model.Document;
 import com.datastax.astra.tool.csv.CsvLoader;
-import com.datastax.astra.tool.csv.CsvLoaderSettings;
 import com.datastax.astra.tool.csv.CsvRowMapper;
 import lombok.extern.slf4j.Slf4j;
 
 /**
- * Sample Code to load a CSV file into Astra using the DataStax Java Driver
+ * Load a CSV to Astra
  */
 @Slf4j
 public class CsvLoaderListing {
 
-
     public static void main(String[] args) throws Exception {
         // Get an empty Collection
         DataAPIClient        client      = new DataAPIClient("<replace_me>");
@@ -29,8 +27,7 @@ public static void main(String[] args) throws Exception {
         CsvLoader.load(csvFilename, collection, new CsvRowMapper() {
             @Override
             public Document map(Document doc) {
-                doc.put(DataAPIKeywords.ID.getKeyword(), doc.get("id"));
-                doc.remove("id");
+                doc.append("_id", doc.get("id")).remove("id"); // rename field id to _id
                 return doc;
             }
         });