Json serialization of timestamps has some issues (they're serialized as objects and not strings, as per protojson format) and @harjotgill created a workaround for that, which converts all timestamp fields manually.
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// HACK: Change timestamps to ISO strings since the protobufjs library uses it in a different format |
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// Issue: https://github.com/protobufjs/protobuf.js/issues/893 |
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// PR: https://github.com/protobufjs/protobuf.js/pull/1258 |
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// Current timestamp type: https://github.com/protocolbuffers/protobuf/blob/main/src/google/protobuf/timestamp.proto |
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const localCheckResponse = this.checkResponse as any; |
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localCheckResponse.start = this.protoTimestampToJSON( |
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this.checkResponse.start, |
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); |
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localCheckResponse.end = this.protoTimestampToJSON( |
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this.checkResponse.end, |
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); |
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localCheckResponse.waitTime = this.protoDurationToJSON( |
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this.checkResponse.waitTime, |
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); |
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// Walk through individual decisions and convert waitTime fields, |
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// then add to localCheckResponse, preserving immutability. |
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if (this.checkResponse.limiterDecisions) { |
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const decisions = this.checkResponse.limiterDecisions.map( |
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(decision) => { |
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return { |
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...decision, |
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waitTime: this.protoDurationToJSON(decision.waitTime), |
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}; |
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}, |
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); |
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localCheckResponse.limiterDecisions = decisions; |
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} |
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this.span.setAttribute( |
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CHECK_RESPONSE_LABEL, |
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JSON.stringify(localCheckResponse), |
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); |
An alternative workaround would be to utilize binary serialization instead of json. We can do it because metricsprocessor accepts aperture.check_response as json but also as base64-encoded protowire. This could even result in a performance improvement as a side-effect.
Note: This requires swapping out the generator, as the current one doesn't provide anything like serializeBinary / encode, etc.
Note: If this requires some more effort, let's stay with current workaround.
