Class: Symian::CostAnalyzer

Inherits:
Object
  • Object
show all
Defined in:
lib/symian/cost_analyzer.rb

Instance Method Summary collapse

Constructor Details

#initialize(configuration) ⇒ CostAnalyzer

Returns a new instance of CostAnalyzer.



5
6
7
8
9
10
 
# File 'lib/symian/cost_analyzer.rb', line 5

def initialize(configuration)
  @configuration = configuration
  unless @configuration.cost_analysis[:operations]
    raise ArgumentError, 'No operations cost configuration provided!'
  end
end

Instance Method Details

#evaluate(kpis) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/symian/cost_analyzer.rb', line 12

def evaluate(kpis)
  # evaluate operation costs
  operations_cost = @configuration.support_groups.inject(0.0) do |sum,(sg_name,sg_conf)|
    sg_costs = @configuration.cost_analysis[:operations].find{|sg| sg[:sg_name] == sg_name }
    unless sg_costs
      raise "Cannot find salaries for support group #{sg_name}!"
    end
    # ugly hack
    sum += sg_conf[:operators][:number] * sg_costs[:operator_salary]
  end
  # need to consider daily costs (salaries are annual)
  operations_cost /= 365.0

  # evaluate contracting costs (SLO violations)
  contracting_func = @configuration.cost_analysis[:contracting]
  contracting_cost = (contracting_func.nil? ? 0.0 : (contracting_func.call(kpis) or 0.0))

  # evaluate drift costs
  drift_func = @configuration.cost_analysis[:drift]
  drift_cost = (drift_func.nil? ? 0.0 : (drift_func.call(kpis) or 0.0))

  # return result
  { :operations => operations_cost, :contracting => contracting_cost, :drift => drift_cost }
end