String xml = Files.forIO().readFrom(configFile, "utf-8");
ServerConfig config = DefaultSaxParser.parse(xml);
// do validation
config.accept(new ServerConfigValidator());
m_config = config;
} else {
if (configFile != null) {
m_logger.warn(String.format("Configuration file(%s) not found, IGNORED.", configFile.getCanonicalPath()));
}