private async Task<Dictionary<string, List<MetricValueBlob>>> FetchMetricValuesFromBlob(BlobInfo blobInfo, MetricFilter filter)
{
if (blobInfo.EndTime < filter.StartTime || blobInfo.StartTime >= filter.EndTime)
{
return new Dictionary<string, List<MetricValueBlob>>();
}
var blob = new CloudBlockBlob(new Uri(blobInfo.BlobUri));
using (var memoryStream = new MemoryStream())
{
try
{
await blob.DownloadToStreamAsync(memoryStream);
}
catch (StorageException ex)
{
if (ex.RequestInformation.HttpStatusCode == 404)
{
return new Dictionary<string, List<MetricValueBlob>>();
}
throw;
}
memoryStream.Seek(0, 0);
using (var streamReader = new StreamReader(memoryStream))
{
string content = await streamReader.ReadToEndAsync();
var metricBlob = JsonConvert.DeserializeObject<MetricBlob>(content);
var metricValues = metricBlob.records;
var metricsPerName = new Dictionary<string, List<MetricValueBlob>>();
foreach (var metric in metricValues)
{
if (metric.time < filter.StartTime || metric.time >= filter.EndTime)
{
continue;
}
List<MetricValueBlob> metrics;
if (!metricsPerName.TryGetValue(metric.metricName, out metrics))
{
metrics = new List<MetricValueBlob>();
metricsPerName.Add(metric.metricName, metrics);
}
metrics.Add(metric);
}
return metricsPerName;
}
}
}
private static string GetBlobEndpoint(BlobInfo blobInfo)
{
return blobInfo.BlobUri.Split(questionMark, StringSplitOptions.RemoveEmptyEntries)[0];
}
