public void addAppender(Appender<AccessEvent> newAppender) {
aai.addAppender(newAppender);
}
// this method MUST be synchronized. See comments on 'aai' field for further
// details.
public synchronized void addAppender(Appender<ILoggingEvent> newAppender) {
if (aai == null) {
aai = new AppenderAttachableImpl<ILoggingEvent>();
}
aai.addAppender(newAppender);
}