Addressed PR comments

Signed-off-by: Owais Kazi <owaiskazi19@gmail.com>

src/main/java/org/opensearch/flowframework/workflow/CreateIndex/CreateIndexStep.java

@@ -12,11 +12,12 @@
 import com.google.common.io.Resources;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.opensearch.action.ActionListener;
 import org.opensearch.action.admin.indices.create.CreateIndexRequest;
 import org.opensearch.action.admin.indices.create.CreateIndexResponse;
 import org.opensearch.client.Client;
+import org.opensearch.common.settings.Settings;
 import org.opensearch.common.xcontent.XContentType;
+import org.opensearch.core.action.ActionListener;
 import org.opensearch.flowframework.workflow.WorkflowData;
 import org.opensearch.flowframework.workflow.WorkflowStep;
 
@@ -26,12 +27,19 @@
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 
+/**
+ * Step to create an index
+ */
 public class CreateIndexStep implements WorkflowStep {
 
     private static final Logger logger = LogManager.getLogger(CreateIndexStep.class);
     private Client client;
-    private final String CREATE_INDEX_STEP = "create_index_step";
+    private final String NAME = "create_index_step";
 
+    /**
+     * Instantiate this class
+     * @param client Client to create an index
+     */
     public CreateIndexStep(Client client) {
         this.client = client;
     }
@@ -43,7 +51,7 @@ public CompletableFuture<WorkflowData> execute(List<WorkflowData> data) {
 
             @Override
             public void onResponse(CreateIndexResponse createIndexResponse) {
-                logger.info("created index:{}");
+                logger.info("created index:{}", createIndexResponse.index());
                 future.complete(new WorkflowData() {
                     @Override
                     public Map<String, Object> getContent() {
@@ -54,41 +62,54 @@ public Map<String, Object> getContent() {
 
             @Override
             public void onFailure(Exception e) {
-                logger.error("Index creation failed", e);
+                logger.error("Failed to create an index", e);
                 future.completeExceptionally(e);
             }
         };
 
         String index = null;
+        String type = null;
+        Settings settings = null;
 
         for (WorkflowData workflowData : data) {
             // Fetch index from content i.e. request body of execute API
             Map<String, Object> content = workflowData.getContent();
             index = (String) content.get("index");
+            type = (String) content.get("type");
+            settings = (Settings) content.get("settings");
+            if (index != null && type != null) {
+                break;
+            }
         }
 
         // TODO:
-        // 1. Map index type -> fileName
-        // 2. Create settings based on the index settings received from content
-        CreateIndexRequest request = new CreateIndexRequest(index).mapping(getIndexMappings(fileName), XContentType.JSON)
-            .settings(settings);
-        client.admin().indices().create(request, actionListener);
+        // 1. Create settings based on the index settings received from content
+
+        try {
+            CreateIndexRequest request = new CreateIndexRequest(index).mapping(getIndexMappings(type), XContentType.JSON)
+                .settings(settings);
+            client.admin().indices().create(request, actionListener);
+        } catch (Exception e) {
+            logger.error("Failed to find the right mapping for the index", e);
+        }
+
         return future;
     }
 
     @Override
     public String getName() {
-        return CREATE_INDEX_STEP;
+        return NAME;
     }
 
     /**
      * Get index mapping json content.
      *
+     * @param mapping type of the index to fetch the specific mapping file
      * @return index mapping
      * @throws IOException IOException if mapping file can't be read correctly
      */
-    public static String getIndexMappings(String mappingFileName) throws IOException {
-        URL url = CreateIndexStep.class.getClassLoader().getResource(mappingFileName);
+    public static String getIndexMappings(String mapping) throws IOException {
+        URL url = CreateIndexStep.class.getClassLoader().getResource(mapping);
         return Resources.toString(url, Charsets.UTF_8);
     }
 }