protected String format(LogEventPatternConverter converter, LogEvent event) {
    StringBuilder sb = new StringBuilder();
    converter.format(event, sb);
    return sb.toString();
}
 

private static List<PatternFormatter> createFormatters() {
    final Configuration config = new DefaultConfiguration();
    final PatternParser parser = new PatternParser(config, "Converter", LogEventPatternConverter.class);
    return parser.parse("%d %5p [%t] %c{1} %X{transactionId} - %m%n", false, true);
}