Outcome

[axw]

Add the Outcome field to Transactions and Spans.

If when a transaction or span is ended, its outcome has not been specified, we either use some protocol/instrumentation-specific logic to set a default, or otherwise set it to "unknown". For HTTP and gRPC, we use the status code to set the outcome.

• HTTP server side: "success" for status codes < 500, "failure" otherwise.
• HTTP client side: "success" for status codes < 400, "failure" otherwise.
• gRPC server side:
  • "unknown" for status code Unknown
  • "failure" for status codes DataLoss, Unavailable, Internal, and Unimplemented
  • "success" otherwise
• gRPC client side:
  • "unknown" for status code Unknown
  • "success" for status code OK
  • "failure" otherwise

Closes #799

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: [Pull request #820 updated]

• Start Time: 2020-09-24T03:53:08.210+0000

• Duration: 23 min 1 sec

Test stats 🧪

Test	Results
Failed	0
Passed	7456
Skipped	182
Total	7638

[simitt]

LGTM