private static string GenerateNamelessMetricFilterString(MetricFilter filter)
{
MetricFilter nameless = new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime
};
return(ShoeboxHelper.GenerateMetricFilterString(nameless));
}
private string GetFilterStringForDefinitions(MetricFilter filter, IEnumerable <MetricDefinition> definitions)
{
return(ShoeboxHelper.GenerateMetricFilterString(new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
DimensionFilters = filter.DimensionFilters.Where(df =>
definitions.Any(d => string.Equals(df.Name, d.Name.Value, StringComparison.OrdinalIgnoreCase)))
}));
}
private static string RemoveNamesFromFilterString(string filterString)
{
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
MetricFilter nameless = new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime
};
return(ShoeboxHelper.GenerateMetricFilterString(nameless));
}
public async Task <MetricListResponse> GetMetricsAsync(string resourceUri, string filterString, CancellationToken cancellationToken)
{
// Ensure exactly one '/' at the start
resourceUri = '/' + resourceUri.TrimStart('/');
// Generate filter strings
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
string metricFilterString = GenerateNamelessMetricFilterString(filter);
string definitionFilterString = 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,
definitionFilterString,
cancellationToken).ConfigureAwait(false)).MetricDefinitionCollection.Value;
// Separate passthrough metrics with dimensions specified
IEnumerable <MetricDefinition> passthruDefinitions = definitions.Where(d => !IsShoebox(d, filter.TimeGrain));
IEnumerable <MetricDefinition> shoeboxDefinitions = definitions.Where(d => IsShoebox(d, filter.TimeGrain));
// Get Passthru definitions
List <Metric> passthruMetrics = new List <Metric>();
string invocationId = TracingAdapter.NextInvocationId.ToString(CultureInfo.InvariantCulture);
this.LogStartGetMetrics(invocationId, resourceUri, filterString, passthruDefinitions);
if (passthruDefinitions.Any())
{
// Create new filter for passthru metrics
List <MetricDimension> passthruDimensionFilters = filter.DimensionFilters == null ? new List <MetricDimension>() :
filter.DimensionFilters.Where(df => passthruDefinitions.Any(d => string.Equals(d.Name.Value, df.Name, StringComparison.OrdinalIgnoreCase))).ToList();
foreach (MetricDefinition def in passthruDefinitions
.Where(d => !passthruDimensionFilters.Any(pdf => string.Equals(pdf.Name, d.Name.Value, StringComparison.OrdinalIgnoreCase))))
{
passthruDimensionFilters.Add(new MetricDimension()
{
Name = def.Name.Value
});
}
MetricFilter passthruFilter = new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
DimensionFilters = passthruDimensionFilters
};
// Create passthru filter string
string passthruFilterString = ShoeboxHelper.GenerateMetricFilterString(passthruFilter);
// Get Metrics from passthrough (hydra) client
MetricListResponse passthruResponse = await this.GetMetricsInternalAsync(resourceUri, passthruFilterString, cancellationToken).ConfigureAwait(false);
passthruMetrics = passthruResponse.MetricCollection.Value.ToList();
this.LogMetricCountFromResponses(invocationId, passthruMetrics.Count());
// Fill in values (resourceUri, displayName, unit) from definitions
CompleteShoeboxMetrics(passthruMetrics, passthruDefinitions, resourceUri);
// Add empty objects for metrics that had no values come back, ensuring a metric is returned for each definition
IEnumerable <Metric> emptyMetrics = passthruDefinitions
.Where(d => !passthruMetrics.Any(m => string.Equals(m.Name.Value, d.Name.Value, StringComparison.OrdinalIgnoreCase)))
.Select(d => new Metric()
{
Name = d.Name,
Unit = d.Unit,
ResourceId = resourceUri,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
TimeGrain = filter.TimeGrain,
MetricValues = new List <MetricValue>(),
Properties = new Dictionary <string, string>()
});
passthruMetrics.AddRange(emptyMetrics);
}
// Get Metrics by definitions
MetricListResponse shoeboxResponse = await this.GetMetricsAsync(resourceUri, metricFilterString, shoeboxDefinitions, cancellationToken).ConfigureAwait(false);
// Create response (merge and wrap metrics)
MetricListResponse result = new MetricListResponse()
{
RequestId = Guid.NewGuid().ToString("D"),
StatusCode = HttpStatusCode.OK,
MetricCollection = new MetricCollection()
{
Value = passthruMetrics.Union(shoeboxResponse.MetricCollection.Value).ToList()
}
};
this.LogEndGetMetrics(invocationId, result);
return(result);
}
// Alternate method for getting metrics by passing in the definitions
// TODO [davmc]: Revisit - this method cannot support dimensions
public async Task <MetricListResponse> GetMetricsAsync(
string resourceUri, string filterString, IEnumerable <MetricDefinition> definitions, CancellationToken cancellationToken)
{
MetricListResponse result;
if (definitions == null)
{
throw new ArgumentNullException("definitions");
}
string invocationId = TracingAdapter.NextInvocationId.ToString(CultureInfo.InvariantCulture);
this.LogStartGetMetrics(invocationId, resourceUri, filterString, definitions);
// If no definitions provided, return empty collection
if (!definitions.Any())
{
result = new MetricListResponse()
{
RequestId = Guid.NewGuid().ToString("D"),
StatusCode = HttpStatusCode.OK
};
this.LogEndGetMetrics(invocationId, result);
return(result);
}
// Parse MetricFilter
MetricFilter filter = MetricFilterExpressionParser.Parse(filterString);
// Names not allowed in filter since the names are in the definitions
if (filter.DimensionFilters != null && filter.DimensionFilters.Any())
{
throw new ArgumentException("Cannot specify names (or dimensions) when MetricDefinitions are included", "filterString");
}
// Ensure every definition has at least one availability matching the filter timegrain
if (!definitions.All(d => d.MetricAvailabilities.Any(a => a.TimeGrain == filter.TimeGrain)))
{
throw new ArgumentException("Definition contains no availability for the timeGrain requested", "definitions");
}
// Group definitions by location so we can make one request to each location
Dictionary <MetricAvailability, MetricFilter> groups =
definitions.GroupBy(d => d.MetricAvailabilities.First(a => a.TimeGrain == filter.TimeGrain),
new AvailabilityComparer()).ToDictionary(g => g.Key, g => new MetricFilter()
{
TimeGrain = filter.TimeGrain,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
DimensionFilters = g.Select(d => new MetricDimension()
{
Name = d.Name.Value
})
});
// Get Metrics from each location (group)
IEnumerable <Task <MetricListResponse> > locationTasks = groups.Select(g => g.Key.Location == null
? this.GetMetricsInternalAsync(resourceUri, ShoeboxHelper.GenerateMetricFilterString(g.Value), cancellationToken)
: ShoeboxClient.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));
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 = definitions
.Where(d => !metrics.Any(m => string.Equals(m.Name.Value, d.Name.Value, StringComparison.OrdinalIgnoreCase)))
.Select(d => new Metric()
{
Name = d.Name,
Unit = d.Unit,
ResourceId = resourceUri,
StartTime = filter.StartTime,
EndTime = filter.EndTime,
TimeGrain = filter.TimeGrain,
MetricValues = new List <MetricValue>(),
Properties = new Dictionary <string, string>()
});
// 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);
}