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| 1 | + |
| 2 | +namespace OpenCensus.Exporter.Stackdriver.Implementation |
| 3 | +{ |
| 4 | + using System.Collections.Generic; |
| 5 | + using System.Linq; |
| 6 | + using Google.Cloud.Trace.V2; |
| 7 | + using OpenCensus.Exporter.Stackdriver.Utils; |
| 8 | + using OpenCensus.Trace; |
| 9 | + using OpenCensus.Trace.Export; |
| 10 | + |
| 11 | + static class SpanExtensions |
| 12 | + { |
| 13 | + /// <summary> |
| 14 | + /// Translating <see cref="ISpanData"/> to Stackdriver's Span |
| 15 | + /// According to <see cref="https://cloud.google.com/trace/docs/reference/v2/rpc/google.devtools.cloudtrace.v2"/> specifications |
| 16 | + /// </summary> |
| 17 | + /// <param name="spanData">Span in OpenCensus format</param> |
| 18 | + /// <param name="projectId">Google Cloud Platform Project Id</param> |
| 19 | + /// <returns></returns> |
| 20 | + public static Span ToSpan(this ISpanData spanData, string projectId) |
| 21 | + { |
| 22 | + string spanId = spanData.Context.SpanId.ToLowerBase16(); |
| 23 | + var span = new Span |
| 24 | + { |
| 25 | + SpanName = new SpanName(projectId, spanData.Context.TraceId.ToLowerBase16(), spanId), |
| 26 | + SpanId = spanId, |
| 27 | + DisplayName = new TruncatableString { Value = spanData.Name }, |
| 28 | + StartTime = spanData.StartTimestamp.ToTimestamp(), |
| 29 | + EndTime = spanData.EndTimestamp.ToTimestamp(), |
| 30 | + ChildSpanCount = spanData.ChildSpanCount, |
| 31 | + }; |
| 32 | + |
| 33 | + if (spanData.Attributes != null) |
| 34 | + { |
| 35 | + span.Attributes = new Span.Types.Attributes |
| 36 | + { |
| 37 | + DroppedAttributesCount = spanData.Attributes != null ? spanData.Attributes.DroppedAttributesCount : 0, |
| 38 | + |
| 39 | + AttributeMap = { spanData.Attributes?.AttributeMap?.ToDictionary( |
| 40 | + s => s.Key, |
| 41 | + s => s.Value?.ToAttributeValue()) }, |
| 42 | + }; |
| 43 | + } |
| 44 | + |
| 45 | + if (spanData.ParentSpanId != null) |
| 46 | + { |
| 47 | + string parentSpanId = spanData.ParentSpanId.ToLowerBase16(); |
| 48 | + if (!string.IsNullOrEmpty(parentSpanId)) |
| 49 | + { |
| 50 | + span.ParentSpanId = parentSpanId; |
| 51 | + } |
| 52 | + } |
| 53 | + |
| 54 | + return span; |
| 55 | + } |
| 56 | + |
| 57 | + public static Google.Cloud.Trace.V2.AttributeValue ToAttributeValue(this IAttributeValue av) |
| 58 | + { |
| 59 | + // TODO Currently we assume we store only strings. |
| 60 | + return new Google.Cloud.Trace.V2.AttributeValue |
| 61 | + { |
| 62 | + StringValue = new TruncatableString |
| 63 | + { |
| 64 | + Value = av.Match( |
| 65 | + s => s, |
| 66 | + b => b.ToString(), |
| 67 | + l => l.ToString(), |
| 68 | + obj => obj.ToString(), |
| 69 | + obj => obj.ToString()) |
| 70 | + } |
| 71 | + }; |
| 72 | + } |
| 73 | + } |
| 74 | + |
| 75 | + /// <summary> |
| 76 | + /// Exports a group of spans to Stackdriver |
| 77 | + /// </summary> |
| 78 | + class StackdriverTraceExporter : IHandler |
| 79 | + { |
| 80 | + private Google.Api.Gax.ResourceNames.ProjectName googleCloudProjectId; |
| 81 | + |
| 82 | + public StackdriverTraceExporter(string projectId) |
| 83 | + { |
| 84 | + googleCloudProjectId = new Google.Api.Gax.ResourceNames.ProjectName(projectId); |
| 85 | + |
| 86 | + } |
| 87 | + |
| 88 | + public void Export(IList<ISpanData> spanDataList) |
| 89 | + { |
| 90 | + TraceServiceClient traceWriter = TraceServiceClient.Create(); |
| 91 | + var batchSpansRequest = new BatchWriteSpansRequest |
| 92 | + { |
| 93 | + ProjectName = googleCloudProjectId, |
| 94 | + Spans = { spanDataList.Select(s => s.ToSpan(googleCloudProjectId.ProjectId)) }, |
| 95 | + }; |
| 96 | + |
| 97 | + traceWriter.BatchWriteSpans(batchSpansRequest); |
| 98 | + } |
| 99 | + } |
| 100 | +} |
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