Tracing Amazon SDK calls with the X-Ray SDK for .NET

When your application makes calls to Amazon Web Services to store data, write to a queue, or send notifications, the X-Ray SDK for .NET tracks the calls downstream in subsegments. Traced Amazon Web Services and resources that you access within those services (for example, an Amazon S3 bucket or Amazon SQS queue), appear as downstream nodes on the trace map in the X-Ray console.

You can instrument all of your Amazon SDK for .NET clients by calling RegisterXRayForAllServices before you create them.

using Amazon;
using Amazon.Util;
using Amazon.DynamoDBv2;
using Amazon.DynamoDBv2.DocumentModel;
using Amazon.XRay.Recorder.Core;
using Amazon.XRay.Recorder.Handlers.AwsSdk;

namespace SampleEBWebApplication.Controllers
{
  public class SampleController : ApiController
  {
    AWSSDKHandler.RegisterXRayForAllServices();
    private static readonly Lazy<AmazonDynamoDBClient> LazyDdbClient = new Lazy<AmazonDynamoDBClient>(() =>
    {
      var client = new AmazonDynamoDBClient(EC2InstanceMetadata.Region ?? RegionEndpoint.USEast1);
      return client;
    });

To instrument clients for some services and not others, call RegisterXRay instead of RegisterXRayForAllServices. Replace the highlighted text with the name of the service's client interface.

AWSSDKHandler.RegisterXRay<IAmazonDynamoDB>()

For all services, you can see the name of the API called in the X-Ray console. For a subset of services, the X-Ray SDK adds information to the segment to provide more granularity in the service map.

For example, when you make a call with an instrumented DynamoDB client, the SDK adds the table name to the segment for calls that target a table. In the console, each table appears as a separate node in the service map, with a generic DynamoDB node for calls that don't target a table.

{
  "id": "24756640c0d0978a",
  "start_time": 1.480305974194E9,
  "end_time": 1.4803059742E9,
  "name": "DynamoDB",
  "namespace": "aws",
  "http": {
    "response": {
      "content_length": 60,
      "status": 200
    }
  },
  "aws": {
    "table_name": "scorekeep-user",
    "operation": "UpdateItem",
    "request_id": "UBQNSO5AEM8T4FDA4RQDEB94OVTDRVV4K4HIRGVJF66Q9ASUAAJG",
  }
}