Class: Fluent::LibratoMetricsOutput::MetricsMixin::Metrics

Inherits:
Object
  • Object
show all
Includes:
Configurable
Defined in:
lib/fluent/plugin/out_librato_metrics_mixin.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pattern) ⇒ Metrics

Returns a new instance of Metrics.



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 82

def initialize(pattern)
  super()
  if pattern && !pattern.empty?
    @pattern = MatchPattern.create(pattern)
  else
    @pattern = nil
  end
end

Instance Attribute Details

#count_proc ⇒ Object

Returns the value of attribute count_proc.



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 118

def count_proc
  @count_proc
end

#each_keys ⇒ Object (readonly)

parsed ‘each_key’



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 96

def each_keys
  @each_keys
end

#key_proc ⇒ Object

Returns the value of attribute key_proc.



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 116

def key_proc
  @key_proc
end

#match_proc ⇒ Object

Returns the value of attribute match_proc.



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 119

def match_proc
  @match_proc
end

#pattern ⇒ Object (readonly)

Returns the value of attribute pattern.



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 91

def pattern
  @pattern
end

#value_proc ⇒ Object

Returns the value of attribute value_proc.



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 117

def value_proc
  @value_proc
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 121

def configure(conf)
  super

  if @each_key
    @each_keys = @each_key.split(',').map {|e| e.strip }
    @key_proc = create_combined_key_proc(@each_keys)
  else
    @each_keys = []
    use_keys = [@name]
    @key_proc = Proc.new {|record| use_keys }
  end

  case @type
  when :int
    if vk = @value_key
      dv = @default_value ? @default_value.to_i : nil
      @value_proc = Proc.new {|record| val = record[vk]; val ? val.to_i : dv }
    else
      dv = @default_value ? @default_value.to_i : 1
      @value_proc = Proc.new {|record| dv }
    end
  when :float
    if vk = @value_key
      dv = @default_value ? @default_value.to_f : nil
      @value_proc = Proc.new {|record| val = record[vk]; val ? val.to_f : dv }
    else
      dv = @default_value ? @default_value.to_f : 1.0
      @value_proc = Proc.new {|record| dv }
    end
  end

  if ck = @count_key
    @count_proc = Proc.new {|record| val = record[ck].to_i; val == 0 ? 1 : val }
  else
    @count_proc = Proc.new {|record| 1 }
  end

  if pt = @pattern
    @match_proc = Proc.new {|tag| pt.match(tag) }
  else
    @match_proc = Proc.new {|tag| true }
  end

  @data = Data.new(self)
end

#create_combined_key_proc(keys) ⇒ Object 



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 167

def create_combined_key_proc(keys)
  if keys.length == 1
    key = keys[0]
    Proc.new {|record|
      val = record[key]
      val ? [val] : nil
    }
  else
    Proc.new {|record|
      keys.map {|key|
        val = record[key]
        break nil unless val
        val
      }
    }
  end
end

#evaluate(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_librato_metrics_mixin.rb', line 185

def evaluate(tag, time, record)
  return nil unless @match_proc.call(tag)

  data = @data

  keys = data.keys = @key_proc.call(record)
  return nil unless keys

  value = data.value = @value_proc.call(record)
  return nil unless value

  data.count = @count_proc.call(record)

  return data
end