*/
    public static synchronized Logger getLogger(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);

        if (!initialized) {
            initialize();
        }
        Logger logger = loggers.get(clazz);
        if (logger == null) {
            logger = new Logger(clazz);
            loggers.put(clazz, logger);
        }
        return logger;
    }

    /**

import org.apache.logging.log4j.Logger;

/**
 * Factory class for managing and organizing document ingesters.
 * The factory maintains a sorted collection of ingesters based on their priority
 * and provides methods to add new ingesters and retrieve the current collection.
 *
 * Ingesters are automatically sorted by priority, with lower numbers having higher priority.
 */
public class IngestFactory {

 *   <li>Column names as metadata</li>
 *   <li>Configurable encoding and row limits</li>
 * </ul>
 */
public class CsvExtractor extends AbstractExtractor {
    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(CsvExtractor.class);

    /** Default encoding for CSV files. */
    protected String encoding = Constants.UTF_8;

    /** Maximum number of rows to extract. */

 *   <li>Clean text conversion from Markdown</li>
 *   <li>Configurable encoding</li>
 * </ul>
 */
public class MarkdownExtractor extends AbstractExtractor {
    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(MarkdownExtractor.class);

    /** Default encoding for Markdown files. */
    protected String encoding = Constants.UTF_8;

- **Java**: 21+ (requires Java 21 or higher)
- **Build System**: Maven 3.x
- **DI Container**: LastaFlute DI
- **HTTP Client**: Apache HttpComponents
- **Content Extraction**: Apache Tika, Apache POI, PDFBox
- **Testing**: JUnit 4, UTFlute, Testcontainers
- **Storage Backends**: OpenSearch, Memory-based

## Quick Start

### Prerequisites

- Java 21 or higher
- Maven 3.6 or higher

### Installation

CoreLib supports multiple logging frameworks. Configure your preferred logger:

```java
// Use with SLF4J (add slf4j-api dependency)
Logger logger = Logger.getLogger(MyClass.class);

// Use with Commons Logging (add commons-logging dependency)  
Logger logger = Logger.getLogger(MyClass.class);

// Use with Java Util Logging (built-in)
Logger logger = Logger.getLogger(MyClass.class.getName());
```

 * Provides RESTful API endpoints for managing elevate word settings in the Fess search engine.
 * Elevate words boost specific search terms to appear higher in search results.
 */
public class ApiAdminElevatewordAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminElevatewordAction.class);

    // ===================================================================================

 *   <li>Array element extraction</li>
 *   <li>Configurable field separator and array formatting</li>
 * </ul>
 */
public class JsonExtractor extends AbstractExtractor {
    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(JsonExtractor.class);

    /** Jackson ObjectMapper for JSON parsing. */
    protected final ObjectMapper objectMapper = new ObjectMapper();

            if (ssoManager.available()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("SSO is available but no user found.");
                }
                saveError(messages -> messages.addErrorsSsoLoginError(GLOBAL));
            }
            if (logger.isDebugEnabled()) {
                logger.debug("Redirecting to login page.");
            }

        }

        if (logger.isDebugEnabled()) {
            try {
                ManagementFactory.getRuntimeMXBean().getInputArguments().stream().forEach(s -> logger.debug("Parameter: {}", s));
                System.getProperties().entrySet().stream().forEach(e -> logger.debug("Property: {}={}", e.getKey(), e.getValue()));
                System.getenv().entrySet().forEach(e -> logger.debug("Env: {}={}", e.getKey(), e.getValue()));