private void decorateResource(DecoratorContext context) {
Metric.Level globalLevel = Metric.Level.OK;
List<String> labels = Lists.newArrayList();
for (final Alert alert : profile.getAlerts()) {
Measure measure = context.getMeasure(alert.getMetric());
if (measure != null) {
Metric.Level level = AlertUtils.getLevel(alert, measure);
measure.setAlertStatus(level);
String text = getText(alert, level);
if (!StringUtils.isBlank(text)) {
measure.setAlertText(text);
labels.add(text);
}
context.saveMeasure(measure);
if (Metric.Level.WARN == level && globalLevel != Metric.Level.ERROR) {
globalLevel = Metric.Level.WARN;
} else if (Metric.Level.ERROR == level) {
globalLevel = Metric.Level.ERROR;
}
}
}
Measure globalMeasure = new Measure(CoreMetrics.ALERT_STATUS, globalLevel);
globalMeasure.setAlertStatus(globalLevel);
globalMeasure.setAlertText(StringUtils.join(labels, ", "));
context.saveMeasure(globalMeasure);
}
@DependsUpon
public List<Metric> dependsUponMetrics() {
List<Metric> metrics = Lists.newLinkedList();
for (Alert alert : profile.getAlerts()) {
metrics.add(alert.getMetric());
}
return metrics;
}
private static boolean evaluateAlert(Alert alert, Measure measure, Metric.Level alertLevel) {
String valueToEval;
if (alertLevel.equals(Metric.Level.ERROR)) {
valueToEval = alert.getValueError();
} else if (alertLevel.equals(Metric.Level.WARN)) {
valueToEval = alert.getValueWarning();
} else {
throw new IllegalStateException(alertLevel.toString());
}
if (StringUtils.isEmpty(valueToEval)) {
return false;
}
Comparable criteriaValue = getValueForComparison(alert.getMetric(), valueToEval);
Comparable metricValue = getMeasureValue(alert.getMetric(), measure);
int comparison = metricValue.compareTo(criteriaValue);
if (alert.isNotEqualsOperator() && comparison == 0
|| alert.isGreaterOperator() && comparison != 1
|| alert.isSmallerOperator() && comparison != -1
|| alert.isEqualsOperator() && comparison != 0) {
return false;
}
return true;
}
private void importAlerts(RulesProfile profile) {
if (profile.getAlerts() != null) {
for (Iterator<Alert> ia = profile.getAlerts().iterator(); ia.hasNext(); ) {
Alert alert = ia.next();
Metric unMarshalledMetric = alert.getMetric();
String validKey = unMarshalledMetric.getKey();
Metric matchingMetricInDb = session.getSingleResult(Metric.class, "key", validKey);
if (matchingMetricInDb == null) {
LoggerFactory.getLogger(getClass()).error("Unable to find metric " + validKey);
ia.remove();
continue;
}
alert.setMetric(matchingMetricInDb);
alert.setRulesProfile(profile);
}
}
}
private String getText(Alert alert, Metric.Level level) {
if (level == Metric.Level.OK) {
return null;
}
return alert.getAlertLabel(level);
}