} catch (final Exception e) {
            logger.debug("Failed to check operation status: operation={}", operationName, e);
        }
        return false;
    }

    /**
     * Retrieves information about the specified operation.
     *
     * @param operationName the operation name to look up.
     * @return an {@link Optional} containing the operation info, or empty if not found.
     */

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *

	var cred auth.Credentials
	var owner bool
	s3Err := ErrAccessDenied
	if _, ok := r.Header[xhttp.AmzContentSha256]; ok &&
		getRequestAuthType(r) == authTypeSigned {
		// Get credential information from the request.
		cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
		if s3Err != ErrNone {
			return cred, owner, s3Err
		}

		// we only support V4 (no presign) with auth body

**Step 1: Extract Documents**

Use your current system's API or export functionality to extract:
- Document URLs or identifiers
- Document content/text
- Metadata (title, author, date, etc.)
- Security/access control information

**Step 2: Format for Fess**

Create NDJSON file with required Fess fields:

```json
{"url":"http://example.com/doc1","title":"Document 1","content":"Full text content...","mimetype":"text/html"}

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *

 *
 * Both the unnecessary port specification (`:80`) and the absent trailing slash (`/`) cause URI to
 * bucket the two URLs separately. This harms URI's usefulness in collections. Any application that
 * stores information-per-URL will need to either canonicalize manually, or suffer unnecessary
 * redundancy for such URLs.
 *
 * Because they don't attempt canonical form, these classes are surprisingly difficult to use

    machine-readable copy of the corresponding source code, to be
    distributed under the terms of Sections 1 and 2 above on a medium
    customarily used for software interchange; or,

    c) Accompany it with the information you received as to the offer to
    distribute corresponding source code. (This alternative is allowed
    only for noncommercial distribution and only if you received the

          fileSystem.deleteIfExists(entry.dirtyFiles[t])
        }
        i.remove()
      }
    }
  }

  /**
   * Creates a new journal that omits redundant information. This replaces the current journal if it
   * exists.
   */
  @Synchronized
  @Throws(IOException::class)
  internal fun rebuildJournal() {
    journalWriter?.close()

   */
  @IgnoreJRERequirement
  public NullPointerTester() {
    try {
      /*
       * Converter.apply has a non-nullable parameter type but doesn't throw for null arguments. For
       * more information, see the comments in that class.
       *
       * We already know that that's how it behaves, and subclasses of Converter can't change that