how to generate X-Amzn-Trace-Id for Golang in the simplest way

Question

I have been seeing this documentation by AWS

Is there any simple way to generate "X-Amzn-Trace-Id" with X-Ray? the func NewIDGenerator() doesn't produce the format of Root xxx.

or can we just use a trusted library for it? Thank you

Answer 1

First Create a Trace using OpenTelemetry's tracer and then inject that context to XRAY Propagator to get TraceId as per AWS's ID specification.

func GetAmazonTraceId(ctx context.Context) string {
    propogator := xray.Propagator{}
    carrier := propagation.HeaderCarrier{}
    propogator.Inject(ctx, carrier)
    traceId := carrier.Get("X-Amzn-Trace-Id")
    return traceId
}

Answer 2

Or, you can write your code to convert standard trace id(String) to xray trace id.

private static final String TRACE_ID_VERSION = "1";
private static final char TRACE_ID_DELIMITER = '-';
private static final int TRACE_ID_DELIMITER_INDEX_1 = 1;
private static final int TRACE_ID_DELIMITER_INDEX_2 = 10;
private static final int TRACE_ID_FIRST_PART_LENGTH = 8;

public static String toXRayTraceId(String traceId) {
    return TRACE_ID_VERSION
        + TRACE_ID_DELIMITER
        + traceId.substring(0, TRACE_ID_FIRST_PART_LENGTH)
        + TRACE_ID_DELIMITER
        + traceId.substring(TRACE_ID_FIRST_PART_LENGTH);
  }