Class: OpenTelemetry::SDK::Metrics::Aggregation::LastValue

Inherits:
Object
  • Object
show all
Defined in:
lib/opentelemetry/sdk/metrics/aggregation/last_value.rb

Overview

Contains the implementation of the LastValue aggregation

Instance Method Summary collapse

Constructor Details

#initialize(aggregation_temporality: :delta) ⇒ LastValue

Returns a new instance of LastValue.



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# File 'lib/opentelemetry/sdk/metrics/aggregation/last_value.rb', line 13

def initialize(aggregation_temporality: :delta)
  @aggregation_temporality = aggregation_temporality == :cumulative ? AggregationTemporality.cumulative : AggregationTemporality.delta
end

Instance Method Details

#aggregation_temporality ⇒ Object 



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# File 'lib/opentelemetry/sdk/metrics/aggregation/last_value.rb', line 48

def aggregation_temporality
  @aggregation_temporality.temporality
end

#collect(start_time, end_time, data_points) ⇒ Object 



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# File 'lib/opentelemetry/sdk/metrics/aggregation/last_value.rb', line 17

def collect(start_time, end_time, data_points)
  if @aggregation_temporality.delta?
    # Set timestamps and 'move' data point values to result.
    ndps = data_points.values.map! do |ndp|
      ndp.start_time_unix_nano = start_time
      ndp.time_unix_nano = end_time
      ndp
    end
    data_points.clear
    ndps
  else
    # Update timestamps and take a snapshot.
    data_points.values.map! do |ndp|
      ndp.start_time_unix_nano ||= start_time # Start time of a data point is from the first observation.
      ndp.time_unix_nano = end_time
      ndp.dup
    end
  end
end

#update(increment, attributes, data_points) ⇒ Object 



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# File 'lib/opentelemetry/sdk/metrics/aggregation/last_value.rb', line 37

def update(increment, attributes, data_points)
  data_points[attributes] = NumberDataPoint.new(
    attributes,
    nil,
    nil,
    increment,
    nil
  )
  nil
end