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prometheus: add histogram support to exporter #601

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merged 2 commits into from
Apr 1, 2020

Commits on Mar 28, 2020

  1. prometheus: add histogram support to exporter

    This PR adds histogram support to the prometheus exporter.
    
    - Adds a new aggregator selector that returns a histogram for `MeasureKind`.
      The selector can be constructed using `simple.NewWithHistogramMeasure`
    - Adds support for histogram aggregators in prometheus collect method.
    
    With this PR, the default selector is changed to use histograms.
    
    In order to support the prometheus histogram, the `aggregator.Histogram`
    interface is extended with the `Sum` method.
    
    fixes open-telemetry#487
    oncilla committed Mar 28, 2020
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Commits on Apr 1, 2020

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