ceph/src/jaegertracing/opentelemetry-cpp/sdk/include/opentelemetry/sdk/metrics/aggregation/aggregation.h

   1 // Copyright The OpenTelemetry Authors
   2 // SPDX-License-Identifier: Apache-2.0
   3
   4 #pragma once
   5 #ifndef ENABLE_METRICS_PREVIEW
   6 #  include "opentelemetry/nostd/string_view.h"
   7 #  include "opentelemetry/sdk/metrics/data/metric_data.h"
   8 #  include "opentelemetry/sdk/metrics/data/point_data.h"
   9 OPENTELEMETRY_BEGIN_NAMESPACE
  10 namespace sdk
  11 {
  12 namespace metrics
  13 {
  14 class Aggregation
  15 {
  16 public:
  17   virtual void Aggregate(long value, const PointAttributes &attributes = {}) noexcept = 0;
  18
  19   virtual void Aggregate(double value, const PointAttributes &attributes = {}) noexcept = 0;
  20
  21   /**
  22    * Returns the result of the merge of the two aggregations.
  23    *
  24    * This should always assume that the aggregations do not overlap and merge together for a new
  25    * cumulative report.
  26    *
  27    * @param delta the newly captured (delta) aggregation
  28    * @return the result of the merge of the given aggregation.
  29    */
  30
  31   virtual std::unique_ptr<Aggregation> Merge(const Aggregation &delta) const noexcept = 0;
  32
  33   /**
  34    * Returns a new delta aggregation by comparing two cumulative measurements.
  35    *
  36    * @param next the newly captured (cumulative) aggregation.
  37    * @return The resulting delta aggregation.
  38    */
  39   virtual std::unique_ptr<Aggregation> Diff(const Aggregation &next) const noexcept = 0;
  40
  41   /**
  42    * Returns the point data that the aggregation will produce.
  43    *
  44    * @return PointType
  45    */
  46
  47   virtual PointType ToPoint() const noexcept = 0;
  48
  49   virtual ~Aggregation() = default;
  50 };
  51
  52 }  // namespace metrics
  53 }  // namespace sdk
  54 OPENTELEMETRY_END_NAMESPACE
  55 #endif