doc.put("url", "http://example.com/bulk/" + i);
            doc.put("content", "This is test content for bulk document " + i);
            doc.put("boost", 1.0f);
            doc.put("role", "Rguest");
            documents.add(doc);
        }

        requestBody.put("documents", documents);

        // Execute bulk create

```

**Step 3: Import to Fess**

Option A: Via Admin UI
1. Go to **System > Backup**
2. Upload `fess-documents.json` (bulk format)
3. Click **Import**

Option B: Via Bulk API
```bash
curl -X PUT "http://localhost:8080/api/admin/documents/bulk" \
  -H "Content-Type: application/x-ndjson" \
  -u admin:admin \
  --data-binary @fess-documents.json
```

#### Index Settings Migration

        }
    }

    /**
     * Performs bulk update operations using a custom bulk request builder.
     *
     * @param consumer Consumer function to configure the bulk request builder
     * @return true if all bulk operations were successful, false otherwise
     * @throws InterruptedRuntimeException if the operation is interrupted
     * @throws SearchEngineClientException if the bulk update fails
     */

            }
        }).execute()) {
            if (logger.isDebugEnabled()) {
                logger.debug("Bulk Response:\n{}", response.getContentAsString());
            }
            systemHelper.reloadConfiguration(resetJobs.get());

            if (logger.isInfoEnabled()) {
                logger.info("Bulk data import completed successfully: fileName={}, resetJobs={}", fileName, resetJobs.get());
            }

    /**
     * Represents an API response for bulk operations, containing a list of processed items.
     */
    public static class ApiBulkResponse extends ApiResponse {
        /**
         * Constructs an empty ApiBulkResponse.
         */
        public ApiBulkResponse() {
            // NOP
        }

        /**
         * The list of items processed in the bulk operation.
         */

        assertEquals(1, testClient.insertBulkDataCalls.size());
        assertFalse(testClient.lastCreateOnly);
    }

    @Test
    public void test_insertBulkData_createOnlyTrue() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        testClient.insertBulkData(fessConfig, "fess_config.scheduled_job", "test.bulk", true);

import org.codelibs.fess.util.DocList;
import org.codelibs.fess.util.MemoryUtil;
import org.opensearch.action.admin.indices.refresh.RefreshResponse;
import org.opensearch.action.bulk.BulkItemResponse;
import org.opensearch.action.bulk.BulkItemResponse.Failure;
import org.opensearch.action.bulk.BulkResponse;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

/**
 * Implementation of IndexUpdateCallback for handling document indexing operations.
 * This class manages the process of updating the search index with documents from
 * data stores, including bulk operations, document transformation, and error handling.
 */
public class IndexUpdateCallbackImpl implements IndexUpdateCallback {
    private static final Logger logger = LogManager.getLogger(IndexUpdateCallbackImpl.class);

        // Log the result
        if (sizeBeforeDeletion > 0) {
            logger.info("Successfully deleted {} crawling info log(s) using bulk delete", sizeBeforeDeletion);
        } else {
            logger.info("No crawling info logs to delete (may have been deleted by previous test)");
        }
    }

     * @param thumbnailId The thumbnail ID.
     * @param value The thumbnail value to update.
     */
    protected void updateThumbnailField(final String thumbnailId, final String value) {
        // TODO bulk
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        try {
            ComponentUtil.getIndexingHelper()