<configuration scan="true" scanPeriod="10 seconds">
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
 <pattern>
  %d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n
 </pattern>
 </encoder>
 </appender>
 <logger name="com.acme" level="DEBUG" additivity="false">
  <appender-ref ref="STDOUT"/>
 </logger>
 <root level="INFO">
  <appender-ref ref="STDOUT"/>
 </root>
</configuration>

ch.qos.logback.core.joran.spi.ConfigurationWatchList#addAsFileToWatch
private void addAsFileToWatch(URL url) {
    File file = convertToFile(url);
    if (file != null) {
        fileWatchList.add(file);
        lastModifiedList.add(file.lastModified());
    }
}

ch.qos.logback.core.joran.spi.ConfigurationWatchList#convertToFile
File convertToFile(URL url) {
    String protocol = url.getProtocol();
    if ("file".equals(protocol)) {
        return new File(URLDecoder.decode(url.getFile()));
    } else {
        addInfo("URL [" + url + "] is not of type file");
        return null;
    }
}