private void appendAlert(Alert alert, Writer writer) throws IOException {
writer.append("<alert><metric>");
StringEscapeUtils.escapeXml(writer, alert.getMetric().getKey());
writer.append("</metric>");
if (alert.getPeriod() != null) {
writer.append("<period>");
StringEscapeUtils.escapeXml(writer, Integer.toString(alert.getPeriod()));
writer.append("</period>");
}
writer.append("<operator>");
StringEscapeUtils.escapeXml(writer, alert.getOperator());
writer.append("</operator>");
writer.append("<warning>");
StringEscapeUtils.escapeXml(writer, alert.getValueWarning());
writer.append("</warning>");
writer.append("<error>");
StringEscapeUtils.escapeXml(writer, alert.getValueError());
writer.append("</error></alert>");
}
