2. **Factory Pattern**: `Curl` class provides static factory methods for each HTTP method
3. **Resource Management**: `CurlResponse` implements `Closeable` for try-with-resources
4. **Async Support**: Both synchronous (`executeSync()`) and asynchronous (`execute()`) execution modes

## Technical Details

- **Java Version**: 17+
- **Dependencies**:
  - Apache Commons IO 2.19.0 (runtime)
  - JUnit 4.13.2 (test)

        TemporaryFileInputStream stream = new TemporaryFileInputStream(tempFile);
        stream.read(); // Read some data
        stream.close();

        // Note: FileUtil.deleteInBackground() performs deletion asynchronously,
        // so we cannot reliably check if file is deleted immediately
        // This test just verifies that close() completes without error
    }

    public void test_emptyFile() throws Exception {

        return new Smb2SessionSetupResponse(cfg);
    }

    /**
     * Build a minimal SMB2 header for a response at the given offset.
     * The header is prepared as a synchronous response with server-to-redirector flag.
     */
    private void buildHeader(byte[] buf, int start, int status, int command, long sessionId) {

    }

    // PUT /api/admin/elevateword/upload
    /**
     * Uploads and imports elevate words from a CSV file.
     * Processes the file asynchronously and updates the suggest helper.
     *
     * @param body upload form containing the CSV file
     * @return JSON response with upload status
     */
    @Execute

        } catch (final Exception e) {
            throw new SuggestIndexException("Failed to index from query_string.", e);
        }
    }

    /**
     * Indexes documents from a query log reader asynchronously.
     * @param queryLogReader The query log reader.
     * @param docPerReq The number of documents to process per request.
     * @param requestInterval The interval between requests.

);

suggester.indexer().index(item);
```

#### 3. Get Suggestions

```java
import org.codelibs.fess.suggest.request.suggest.SuggestResponse;

// Synchronous suggestion request
SuggestResponse response = suggester.suggest()
    .setQuery("sea")                    // user input
    .setSize(10)                        // max suggestions
    .execute()
    .getResponse();

            if (Thread.currentThread() == this.thread) {
                // we are in the transport thread, ie. on idle disconnecting
                // this is synchronous operation
                // This does not handle compound requests
                synchronized (this.inLock) {
                    final Long peekKey = peekKey();
                    if (peekKey == firstKey) {

        }
        load();
    }

    /**
     * Updates the processor configuration by reloading available searchers.
     * This method executes the load operation asynchronously in a separate thread.
     */
    public void update() {
        CommonPoolUtil.execute(this::load);
    }

    /**
     * Loads the available searcher names from system properties.

            breakNotif.getLeaseKey(),
            breakNotif.getNewLeaseState()
        );
        
        sendAsync(ack);  // Send acknowledgment asynchronously
    }
    // ... handle other message types ...
}
```

## 7. Configuration

### 7.1 Configuration Properties
```java
// In PropertyConfiguration.java

     */
    @Override
    public ActionFuture<IndexResponse> index(final IndexRequest request) {
        return client.index(request);
    }

    /**
     * Executes an index request asynchronously.
     *
     * @param request The index request.
     * @param listener The response listener.
     */
    @Override