* For thread-safe usage, wrap with {@link java.util.Collections#synchronizedMap(Map)}:
 * </p>
 * <pre>
 * Map&lt;K, V&gt; syncMap = Collections.synchronizedMap(new LruHashMap&lt;&gt;(100));
 * </pre>
 * <p>
 * Alternatively, for high-concurrency scenarios, consider implementing a custom
 * LRU cache using {@link java.util.concurrent.ConcurrentHashMap} with an eviction strategy.
 * </p>
 *
 * @author koichik
 * @param <K> the key type

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

#### Crawl-Based Migration

Alternatively, let Fess recrawl your content:

1. **Web Content**: Configure Web Crawler with starting URLs
2. **File Shares**: Configure File Crawler with SMB/FTP paths

     * resolved. If the names cannot be resolved (e.g. due to temporary
     * network failure), the said methods will return default values (usually
     * <code>S-X-Y-Z</code> strings of fragments of).
     * <p>
     * Alternatively <code>getSecurity(true)</code> may be used to resolve all
     * SIDs together and detect network failures.
     *
     * @return array of ACEs
     * @throws IOException if an I/O error occurs
     */

     * resolved. If the names cannot be resolved (e.g. due to temporary
     * network failure), the said methods will return default values (usually
     * {@code S-X-Y-Z} strings of fragments of).
     * <p>
     * Alternatively {@code getSecurity(true)} may be used to resolve all
     * SIDs together and detect network failures.
     */
    /**
     * Returns the security information for this file
     *