How to modify 1.3.0 to 2.0.0

[fangandyuan]

func recordResumeTime(metric: MXMetricPayload) {
    if let resumeTimeEnumerator = metric.applicationLaunchMetrics?.histogrammedApplicationResumeTime.bucketEnumerator {
      let rawHistogram = meter.createRawDoubleHistogram(name: ElasticMetrics.appLaunchTime.rawValue)
      var bounds = [Double]()
      var counts = [Int]()
      var sum = 0.0
      var count = 0
      // swiftlint:disable:next force_cast
      for bucket in resumeTimeEnumerator.allObjects as! [MXHistogramBucket] {
        bounds.append(bucket.bucketStart.value)
        bounds.append(bucket.bucketEnd.value)
        counts.append(0)
        counts.append(bucket.bucketCount)
        let avg = (bucket.bucketStart.value + bucket.bucketEnd.value) / 2
        sum += avg * Double(bucket.bucketCount)
        count += bucket.bucketCount
      }
      counts.append(0)
      //            SummaryData
      rawHistogram.record(explicitBoundaries: bounds,
                          counts: counts,
                          startDate: metric.timeStampBegin,
                          endDate: metric.timeStampEnd,
                          count: count,
                          sum: sum,
                          labels: [LaunchTimeValues.key.rawValue: LaunchTimeValues.resume.rawValue])
    }
  }

How should this logic be implemented in version 2.0.0?

[bryce-b]

I need to find a solution for this in my own projects. I suspect there is a means to do this in the stable version of OpenTelemetry metrics; the original raw metrics implementation was created as a stop-gap in the original metrics implementation this sdk had. I'll do some research and see what I can come up with. Let us know if you find a solution yourself, as well.

[bryce-b]

I'm going to transfer this issue to https://github.com/open-telemetry/opentelemetry-swift-core

[bryce-b]

@fangandyuan Have you seen the new MetricKit instrumentation? It uses spans, but it at least conveys the information you're looking for.