Sample Logger in Apex (does not store the logs; do whatever you want here)

Logger.cls

public class Logger {
    static Pattern thePattern = Pattern.compile(
        '(?i)^(?:class\\.)?([^.]+)\\.?([^\\.\\:]+)?[\\.\\:]?([^\\.\\:]*): line (\\d+), column (\\d+)$'
    );
    static Log__c[] logs = new Log__c[0];
    static LoggingLevel controlLevel = LoggingLevel.DEBUG;
    
    public static void addLog(String message) {
        addLog(new DmlException(), controlLevel, message, null);
    }

    public static void addLog(String message, Object value) {
        addLog(new DmlException(), controlLevel, message, value);
    }

    public static void addLog(LoggingLevel level, String message) {
        addLog(new DmlException(), level, message, null);
    }

    public static void addLog(LoggingLevel level, String message, Object value) {
        addLog(new DmlException(), level, message, value);
    }
    
    static void addLog(Exception ex, LoggingLevel level, String message, Object value) {
        if(level.ordinal() > controlLevel.ordinal()) {
            return;
        }
        Matcher m = thePattern.matcher(ex.getStackTraceString().split('\n',3)[1]);
        String className, methodName, line, column;
        if(m.find()) {
            String[] groups = new String[] { m.group(1), m.group(2), m.group(3), m.group(4), m.group(5)};
                if(String.isBlank(groups[3])) {
                    className = groups[0];
                    methodName = groups[1];
                } else {
                    className = groups[0] + '.' + groups[1];
                    methodName = groups[2];
                }
            line = groups[4];
            column = groups[5];
            // Write your output/log files here
        }
    }
}