Class: CompareCompressors::CostModel

Inherits:
Object
  • Object
show all
Defined in:
lib/compare_compressors/cost_model.rb

Overview

Define costs for comparing grouped results.

Constant Summary collapse

DEFAULT_GIBYTE_COST =

Default to current Amazon S3 storage cost per GiB*month ($).

0.023
DEFAULT_HOUR_COST =

Default to on-demand cost for an Amazon EC2 m3.medium ($).

0.073
DEFAULT_USE_CPU_TIME =

Default to elapsed time rather than CPU time.

false
DEFAULT_CURRENCY =

Default to dollars.

'$'
DEFAULT_SUMMARIZE_TOP =

Default to dollars.

5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gibyte_cost: DEFAULT_GIBYTE_COST, compression_hour_cost: DEFAULT_HOUR_COST, decompression_hour_cost: DEFAULT_HOUR_COST, use_cpu_time: DEFAULT_USE_CPU_TIME, currency: DEFAULT_CURRENCY) ⇒ CostModel

Returns a new instance of CostModel.



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# File 'lib/compare_compressors/cost_model.rb', line 23

def initialize(
  gibyte_cost: DEFAULT_GIBYTE_COST,
  compression_hour_cost: DEFAULT_HOUR_COST,
  decompression_hour_cost: DEFAULT_HOUR_COST,
  use_cpu_time: DEFAULT_USE_CPU_TIME,
  currency: DEFAULT_CURRENCY
)
  @gibyte_cost = gibyte_cost
  @compression_hour_cost = compression_hour_cost
  @decompression_hour_cost = decompression_hour_cost
  @use_cpu_time = use_cpu_time
  @currency = currency
end

Instance Attribute Details

#compression_hour_cost ⇒ Object (readonly)

Returns the value of attribute compression_hour_cost.



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# File 'lib/compare_compressors/cost_model.rb', line 38

def compression_hour_cost
  @compression_hour_cost
end

#currency ⇒ Object (readonly)

Returns the value of attribute currency.



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# File 'lib/compare_compressors/cost_model.rb', line 41

def currency
  @currency
end

#decompression_hour_cost ⇒ Object (readonly)

Returns the value of attribute decompression_hour_cost.



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# File 'lib/compare_compressors/cost_model.rb', line 39

def decompression_hour_cost
  @decompression_hour_cost
end

#gibyte_cost ⇒ Object (readonly)

Returns the value of attribute gibyte_cost.



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# File 'lib/compare_compressors/cost_model.rb', line 37

def gibyte_cost
  @gibyte_cost
end

#use_cpu_time ⇒ Object (readonly)

Returns the value of attribute use_cpu_time.



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# File 'lib/compare_compressors/cost_model.rb', line 40

def use_cpu_time
  @use_cpu_time
end

Instance Method Details

#cost(grouped_results) ⇒ Object 



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# File 'lib/compare_compressors/cost_model.rb', line 43

def cost(grouped_results)
  grouped_results.map do |group_result|
    CostedGroupResult.new(self, group_result)
  end
end

#summarize(costed_grouped_results, top = DEFAULT_SUMMARIZE_TOP) ⇒ Object 



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# File 'lib/compare_compressors/cost_model.rb', line 49

def summarize(costed_grouped_results, top = DEFAULT_SUMMARIZE_TOP)
  costed_grouped_results.sort_by(&:total_cost).take(top).map do |result|
    result.to_s(currency)
  end
end