long modifyTime = config.getModifyDate().getTime();
synchronized (this) {
if (modifyTime > m_modifyTime) {
String content = config.getContent();
UrlPattern pattern = DefaultSaxParser.parse(content);
m_UrlPattern = pattern;
m_handler.register(new ArrayList<PatternItem>(m_UrlPattern.getPatternItems().values()));
m_modifyTime = modifyTime;
}