static ArrayList<Datapoint> convertMetricStatisticsToDatapoints(
Statistics statistics, Collection<MetricStatistics> metrics) {
ArrayList<Datapoint> datapoints = Lists.newArrayList();
boolean wantsAverage = statistics.getMember().contains("Average");
boolean wantsSum = statistics.getMember().contains("Sum");
boolean wantsSampleCount = statistics.getMember().contains("SampleCount");
boolean wantsMaximum = statistics.getMember().contains("Maximum");
boolean wantsMinimum = statistics.getMember().contains("Minimum");
for (MetricStatistics metricStatistics : metrics) {
Datapoint datapoint = new Datapoint();
datapoint.setTimestamp(metricStatistics.getTimestamp());
datapoint.setUnit(metricStatistics.getUnits().toString());
if (wantsSum) {
datapoint.setSum(metricStatistics.getSampleSum());
}
if (wantsSampleCount) {
datapoint.setSampleCount(metricStatistics.getSampleSize());
}
if (wantsMaximum) {
datapoint.setMaximum(metricStatistics.getSampleMax());
}
if (wantsMinimum) {
datapoint.setMinimum(metricStatistics.getSampleMin());
}
if (wantsAverage) {
datapoint.setAverage(
MetricUtils.average(metricStatistics.getSampleSum(), metricStatistics.getSampleSize()));
}
datapoints.add(datapoint);
}
return datapoints;
}
static Statistics validateStatistics(Statistics statistics) throws CloudWatchException {
Collection<String> statisticCollection = null;
if (statistics != null) {
statisticCollection = statistics.getMember();
}
if (statisticCollection == null) {
throw new MissingParameterException("The parameter Statistics is required.");
}
if (statisticCollection.size() < 1) {
throw new MissingParameterException("The parameter Statistics is required.");
}
if (statisticCollection.size() > 5) {
throw new InvalidParameterValueException(
"The collection MetricData must not have a size greater than 5.");
}
int ctr = 1;
String[] statisticValues = new String[] {"Average", "Sum", "SampleCount", "Maximum", "Minimum"};
for (String statistic : statisticCollection) {
if (statistic == null) {
throw new InvalidParameterValueException(
"The parameter Statistics.member." + ctr + " is required.");
}
if (!Arrays.asList(statisticValues).contains(statistic)) {
throw new InvalidParameterValueException(
"The parameter Statistics.member."
+ ctr
+ " must be a value in the set "
+ Arrays.asList(statisticValues)
+ ".");
}
ctr++;
}
return statistics;
}