Class: RRD::CDP

Inherits:
Object
  • Object
show all
Defined in:
lib/rrd/cdp.rb

Constant Summary collapse

CDP_val = 
0
CDP_unkn_pdp_cnt = 
1
CDP_hw_intercept = 
2
CDP_hw_seasonal = 
2
CDP_seasonal_deviation = 
2
CDP_hw_last_intercept = 
3
CDP_hw_last_seasonal = 
3
CDP_last_seasonal_deviation = 
3
CDP_hw_slope = 
4
CDP_hw_last_slope = 
5
CDP_null_count = 
6
CDP_init_seasonal = 
6
CDP_last_null_count = 
7
CDP_primary_val = 
8
CDP_secondary_val = 
9

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ CDP

Returns a new instance of CDP.



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# File 'lib/rrd/cdp.rb', line 19

def initialize(options)
  @options = options
end

Class Method Details

.parse(reader, rra) ⇒ Object 



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# File 'lib/rrd/cdp.rb', line 23

def self.parse(reader, rra)
  params = reader.read_uniparams(10)

  options = {
    primary_value: params[CDP_primary_val].to_f,
    secondary_value: params[CDP_secondary_val].to_f
  }

  case rra.cf
  when :hwpredict, :mhwpredict
    options[:intercept] = params[CDP_hw_intercept].to_f
    options[:last_intercept] = params[CDP_hw_intercept].to_f
    options[:slope] = params[CDP_hw_intercept].to_f
    options[:last_slope] = params[CDP_hw_intercept].to_f
    options[:null_count] = params[CDP_hw_intercept].to_i
    options[:last_null_count] = params[CDP_hw_intercept].to_i
  when :seasonal
    options[:seasonal] = params[CDP_hw_seasonal].to_f
    options[:last_seasonal] = params[CDP_hw_last_seasonal].to_f
    options[:init_seasonal] = params[CDP_init_seasonal].to_i
  when :devseasonal
    options[:seasonal_deviation] = params[CDP_seasonal_deviation].to_f
    options[:last_seasonal_deviation] = params[CDP_last_seasonal_deviation].to_f
    options[:init_seasonal] = params[CDP_init_seasonal].to_i
  else
    options[:value] = params[CDP_val].to_f
    options[:unknown_datapoints] = params[CDP_unkn_pdp_cnt].to_i
  end

  new(options)
end