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public interface Log4jControllerMBean {

    /**
     * @return a list of all registered loggers 
     */
    List<String> getLoggers();

    /**
     * Get the effective log level for a given logger
     * 
     * @param logger name of the logger
     * @return its log level ("INFO", for example)
     */
    String getLogLevel(String logger);

    /**
     * Set the log level for a logger 
     *
     * @param logger name of the logger 
     * @param level desired level ("INFO", for example)
     * @return true, if successfully set, false otherwise.
     */
    Boolean setLogLevel(String logger, String level);
}

public class LogLevelManager {
    /**
     * Create and register a JMX mBean called Log4jController in the specified domain
     *
     * @param domain domain of the mBean
     */
    public static void registerLog4jController(String domain) {
        // implementation
    }
}