public async Task <MetricListResponse> GetMetricsAsync(string resourceId, string filterString, IEnumerable <MetricDefinition> definitions, string invocationId)
{
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
// Grab all metric definitiions that contain the specific timegrain from the filter.
// See the extension class for implementation
var timegraindefinitions = from d in definitions
where d.MetricAvailabilities.Count > 0 &&
d.MetricAvailabilities.Contains(filter)
select d;
// Group definitions by location so we can make one request to each location
Dictionary <MetricAvailability, MetricFilter> groups =
timegraindefinitions.GroupBy(d => d.MetricAvailabilities.FirstOrDefault()).ToDictionary(g => g.Key, g => new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
DimensionFilters = g.Select(d =>
filter.DimensionFilters.FirstOrDefault(df => string.Equals(df.Name, d.Name.Value, StringComparison.OrdinalIgnoreCase))
?? new MetricDimension()
{
Name = d.Name.Value
})
}, new AvailabilityComparer());
// Verify all groups represent shoebox metrics
if (groups.Any(g => g.Key.Location == null))
{
throw new ArgumentException("All definitions provided to ShoeboxMetricRetriever must include location information.", "definitions");
}
// Get Metrics from each location (group)
IEnumerable <Task <MetricListResponse> > locationTasks = groups.Select(g => this.GetMetricsInternalAsync(g.Value, g.Key.Location, invocationId));
// Aggregate metrics from all groups
MetricListResponse[] results = (await Task.Factory.ContinueWhenAll(locationTasks.ToArray(), tasks => tasks.Select(t => t.Result))).ToArray();
IEnumerable <Metric> metrics = results.Aggregate <MetricListResponse, IEnumerable <Metric> >(
new List <Metric>(), (list, response) => list.Union(response.MetricCollection.Value));
// Return aggregated results (the MetricOperations class will fill in additional info from the MetricDefinitions)
return(new MetricListResponse()
{
RequestId = invocationId,
StatusCode = HttpStatusCode.OK,
MetricCollection = new MetricCollection()
{
Value = metrics.ToList()
}
});
}
public async Task <MetricListResponse> GetMetricsAsync(string resourceUri, string filterString, CancellationToken cancellationToken)
{
if (resourceUri == null)
{
throw new System.ArgumentNullException("resourceUri");
}
// Generate filter strings
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
string filterStringNamesOnly = filter.DimensionFilters == null ? null
: ShoeboxHelper.GenerateMetricDefinitionFilterString(filter.DimensionFilters.Select(df => df.Name));
// Get definitions for requested metrics
IList <MetricDefinition> definitions =
(await this.Client.MetricDefinitionOperations.GetMetricDefinitionsAsync(
resourceUri,
filterStringNamesOnly,
cancellationToken).ConfigureAwait(false)).MetricDefinitionCollection.Value;
// Get Metrics with definitions
return(await this.GetMetricsAsync(resourceUri, filterString, definitions, cancellationToken));
}
public Task <MetricListResponse> GetMetricsAsync(string resourceId, string filterString, IEnumerable <MetricDefinition> definitions, string invocationId)
{
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
return(Task.Factory.StartNew(() => new MetricListResponse()
{
RequestId = invocationId,
StatusCode = HttpStatusCode.OK,
MetricCollection = new MetricCollection()
{
Value = definitions == null ? new List <Metric>() : definitions.Select(d => new Metric()
{
Name = d.Name,
Unit = d.Unit,
ResourceId = resourceId,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
TimeGrain = filter.TimeGrain,
MetricValues = new List <MetricValue>(),
Properties = new Dictionary <string, string>()
}).ToList()
}
}));
}
public async Task <MetricListResponse> GetMetricsAsync(string resourceId, string filterString, IEnumerable <MetricDefinition> definitions, string invocationId)
{
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
var metricsPerBlob = new Dictionary <string, Task <Dictionary <string, List <MetricValueBlob> > > >(StringComparer.OrdinalIgnoreCase);
// We download all the relevant blobs first and then use the data later, to avoid download the same blob more than once.
foreach (MetricDefinition metricDefinition in definitions)
{
if (!IsMetricDefinitionIncluded(filter, metricDefinition))
{
continue;
}
foreach (MetricAvailability availability in metricDefinition.MetricAvailabilities)
{
if (availability.BlobLocation == null)
{
continue;
}
foreach (BlobInfo blobInfo in availability.BlobLocation.BlobInfo)
{
string blobId = GetBlobEndpoint(blobInfo);
if (!metricsPerBlob.ContainsKey(blobId))
{
metricsPerBlob.Add(blobId, FetchMetricValuesFromBlob(blobInfo, filter));
}
}
}
}
foreach (var task in metricsPerBlob.Values)
{
await task;
}
var result = new MetricListResponse
{
MetricCollection = new MetricCollection
{
Value = new List <Metric>()
}
};
// Populate the metrics result using the data from the blobs.
foreach (MetricDefinition metricDefinition in definitions)
{
if (!IsMetricDefinitionIncluded(filter, metricDefinition))
{
continue;
}
foreach (MetricAvailability availability in metricDefinition.MetricAvailabilities)
{
if (availability.BlobLocation == null)
{
continue;
}
var metricValues = new List <MetricValueBlob>();
foreach (BlobInfo blobInfo in availability.BlobLocation.BlobInfo)
{
string blobId = GetBlobEndpoint(blobInfo);
List <MetricValueBlob> metricsInBlob;
if (metricsPerBlob[blobId].Result.TryGetValue(metricDefinition.Name.Value, out metricsInBlob))
{
metricValues.AddRange(metricsInBlob);
}
}
var metric = new Metric
{
Name = new LocalizableString
{
Value = metricDefinition.Name.Value,
LocalizedValue = metricDefinition.Name.LocalizedValue,
},
StartTime = filter.StartTime,
EndTime = filter.EndTime,
MetricValues = GetAggregatedByTimestamp(metricValues),
TimeGrain = availability.TimeGrain,
};
result.MetricCollection.Value.Add(metric);
}
}
return(result);
}
// Alternate method for getting metrics by passing in the definitions
public async Task <MetricListResponse> GetMetricsAsync(
string resourceUri, string filterString, IEnumerable <MetricDefinition> definitions, CancellationToken cancellationToken)
{
if (definitions == null)
{
throw new ArgumentNullException("definitions");
}
if (resourceUri == null)
{
throw new ArgumentNullException("resourceUri");
}
// Remove any '/' characters from the start since these are handled by the hydra (thin) client
// Don't encode Uri segments here since this will mess up the SAS retrievers (they use the resourceUri directly)
resourceUri = resourceUri.TrimStart('/');
MetricListResponse result;
string invocationId = TracingAdapter.NextInvocationId.ToString(CultureInfo.InvariantCulture);
// If no definitions provided, return empty collection
if (!definitions.Any())
{
this.LogStartGetMetrics(invocationId, resourceUri, filterString, definitions);
result = new MetricListResponse()
{
RequestId = Guid.NewGuid().ToString("D"),
StatusCode = HttpStatusCode.OK,
MetricCollection = new MetricCollection()
{
Value = new Metric[0]
}
};
this.LogEndGetMetrics(invocationId, result);
return(result);
}
// Parse MetricFilter
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
// Names in filter must match the names in the definitions
if (filter.DimensionFilters != null && filter.DimensionFilters.Any())
{
IEnumerable <string> filterNames = filter.DimensionFilters.Select(df => df.Name);
IEnumerable <string> definitionNames = definitions.Select(d => d.Name.Value);
IEnumerable <string> filterOnly = filterNames.Where(fn => !definitionNames.Contains(fn, StringComparer.InvariantCultureIgnoreCase));
IEnumerable <string> definitionOnly = definitionNames.Where(df => !filterNames.Contains(df, StringComparer.InvariantCultureIgnoreCase));
if (filterOnly.Any() || definitionOnly.Any())
{
throw new ArgumentException("Set of names specified in filter string must match set of names in provided definitions", "filterString");
}
// "Filter out" metrics with unsupported dimensions
definitions = definitions.Where(d => SupportsRequestedDimensions(d, filter));
}
else
{
filter = new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
DimensionFilters = definitions.Select(d => new MetricDimension()
{
Name = d.Name.Value
})
};
}
// Parse out provider name and determine if provider is storage
string providerName = this.GetProviderFromResourceId(resourceUri);
bool isStorageProvider =
string.Equals(providerName, "Microsoft.Storage", StringComparison.OrdinalIgnoreCase) ||
string.Equals(providerName, "Microsoft.ClassicStorage", StringComparison.OrdinalIgnoreCase);
// Create supported MetricRetrievers
IMetricRetriever proxyRetriever = new ProxyMetricRetriever(this);
IMetricRetriever shoeboxRetriever = new ShoeboxMetricRetriever();
IMetricRetriever storageRetriever = new StorageMetricRetriever();
IMetricRetriever blobShoeboxMetricRetriever = new BlobShoeboxMetricRetriever();
IMetricRetriever emptyRetriever = EmptyMetricRetriever.Instance;
// Create the selector function here so it has access to the retrievers, filter, and providerName
Func <MetricDefinition, IMetricRetriever> retrieverSelector = (d) =>
{
if (!d.MetricAvailabilities.Any())
{
return(emptyRetriever);
}
if (isStorageProvider)
{
return(storageRetriever);
}
if (IsBlobSasMetric(d, filter.TimeGrain))
{
return(blobShoeboxMetricRetriever);
}
if (IsTableSasMetric(d, filter.TimeGrain))
{
return(shoeboxRetriever);
}
return(proxyRetriever);
};
// Group definitions by retriever so we can make one request to each retriever
IEnumerable <IGrouping <IMetricRetriever, MetricDefinition> > groups = definitions.GroupBy(retrieverSelector);
// Get Metrics from each retriever (group)
IEnumerable <Task <MetricListResponse> > locationTasks = groups.Select(g =>
g.Key.GetMetricsAsync(resourceUri, GetFilterStringForDefinitions(filter, g), g, invocationId));
// Aggregate metrics from all groups
this.LogStartGetMetrics(invocationId, resourceUri, filterString, definitions);
MetricListResponse[] results = (await Task.Factory.ContinueWhenAll(locationTasks.ToArray(), tasks => tasks.Select(t => t.Result))).ToArray();
IEnumerable <Metric> metrics = results.Aggregate <MetricListResponse, IEnumerable <Metric> >(
new List <Metric>(), (list, response) => list.Union(response.MetricCollection.Value));
this.LogMetricCountFromResponses(invocationId, metrics.Count());
// Fill in values (resourceUri, displayName, unit) from definitions
CompleteShoeboxMetrics(metrics, definitions, resourceUri);
// Add empty objects for metrics that had no values come back, ensuring a metric is returned for each definition
IEnumerable <Metric> emptyMetrics = (await emptyRetriever.GetMetricsAsync(
resourceUri,
filterString,
definitions.Where(d => !metrics.Any(m => string.Equals(m.Name.Value, d.Name.Value, StringComparison.OrdinalIgnoreCase))),
invocationId)).MetricCollection.Value;
// Create response (merge and wrap metrics)
result = new MetricListResponse()
{
RequestId = Guid.NewGuid().ToString("D"),
StatusCode = HttpStatusCode.OK,
MetricCollection = new MetricCollection()
{
Value = metrics.Union(emptyMetrics).ToList()
}
};
this.LogEndGetMetrics(invocationId, result);
return(result);
}
