Class: Fluent::StatsitePlugin::Histogram

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/plugin/statsite/histogram.rb

Constant Summary collapse

FIELD = 
%w(
  min
  max
  width
)
OPTIONAL_FIELD = 
%w(prefix)
FLOATING_FIELD = 
%w(
  min
  max
  width
)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(prefix, min, max, width) ⇒ Histogram

Returns a new instance of Histogram.



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# File 'lib/fluent/plugin/statsite/histogram.rb', line 18

def initialize(prefix, min, max, width)
  @prefix = prefix
  @min = min
  @max = max
  @width = width

  @section = prefix.nil? ? "default" : prefix
end

Class Method Details

.validate(h) ⇒ Object 



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# File 'lib/fluent/plugin/statsite/histogram.rb', line 37

def self.validate(h)
  if h.class != Hash
    raise ConfigError, "a type of histogram element must be Hash, but specified as #{h.class}"
  end

  FIELD.each do |f|
    if not h.has_key?(f)
      raise ConfigError, "histogram element must contain '#{f}'"
    end
  end

  h.keys.each do |k|
    if not FIELD.member?(k) and not OPTIONAL_FIELD.member?(k)
      raise ConfigError, "invalid histogram hash key: #{k}"
    end
  end

  FLOATING_FIELD.each do |f|
    cls = h[f].class
    if cls != Fixnum and cls != Float
      raise ConfigError, "#{f} value of histogram must be Fixnum or Float"
    end
  end

  new(h['prefix'], h['min'], h['max'], h['width'])
end

Instance Method Details

#to_ini ⇒ Object 



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# File 'lib/fluent/plugin/statsite/histogram.rb', line 27

def to_ini
  "[histogram_\#{@section}]\nprefix=\#{@prefix}\nmin=\#{@min}\nmax=\#{@max}\nwidth=\#{@width}\n  INI\nend\n"