/// <summary>
/// Sends the data asynchronously.
/// </summary>
/// <returns>A task.</returns>
private async Task SendDataAsync()
{
// use a copy of the data so we can limit the time in the blocking state
Amazon.CloudWatch.Model.MetricDatum[] copy = null;
try
{
await semaphore.WaitAsync();
copy = new Amazon.CloudWatch.Model.MetricDatum[data.Count];
data.CopyTo(copy);
data.Clear();
lastSend = DateTimeOffset.UtcNow;
}
finally
{
semaphore.Release();
}
var t = Task.Factory.StartNew(() =>
{
// send the metrics to AWS CloudWatch
// NOTE: for now this is fire and forget
cloudWatch.PutMetricDataAsync(new Amazon.CloudWatch.Model.PutMetricDataRequest
{
MetricData = copy.ToList(),
Namespace = configuration.MetricNamespace
});
}, TaskCreationOptions.LongRunning);
}
private void RenderAWSMetricDatum(Amazon.CloudWatch.Model.MetricDatum metricDatum, TextWriter writer)
{
if (!String.IsNullOrEmpty(metricDatum.MetricName))
{
writer.Write("MetricName: {0}, ", metricDatum.MetricName);
}
if (!String.IsNullOrEmpty(metricDatum.Unit))
{
writer.Write("Unit: {0}, ", metricDatum.Unit);
}
if (metricDatum.StatisticValues == null)
{
writer.Write("Value: {0}, ", metricDatum.Value.ToString(CultureInfo.InvariantCulture));
}
if (metricDatum.Dimensions != null && metricDatum.Dimensions.Any())
{
writer.Write("Dimensions: {0}, ", String.Join(", ",
metricDatum.Dimensions.Select(
x =>
String.Format("{0}: {1}", x.Name, x.Value)).ToArray()));
}
if (metricDatum.Timestamp != default(DateTime))
{
writer.Write("Timestamp: {0}, ", metricDatum.Timestamp.ToString(CultureInfo.CurrentCulture));
}
if (metricDatum.StatisticValues != null)
{
if (metricDatum.StatisticValues.Maximum > 0)
{
writer.Write("Maximum: {0}, ", metricDatum.StatisticValues.Maximum.ToString(CultureInfo.InvariantCulture));
}
writer.Write("Minimum: {0}, ", metricDatum.StatisticValues.Minimum.ToString(CultureInfo.InvariantCulture));
if (metricDatum.StatisticValues.SampleCount > 1)
{
writer.Write("SampleCount: {0}, ", metricDatum.StatisticValues.SampleCount.ToString(CultureInfo.InvariantCulture));
}
if (metricDatum.StatisticValues.Sum > 0)
{
writer.Write("Sum: {0}, ", metricDatum.StatisticValues.Sum.ToString(CultureInfo.InvariantCulture));
}
}
}
