Class: Fluent::AmplifierFilterOutput

Inherits:
Output
  • Object
show all
Defined in:
lib/fluent/plugin/out_amplifier_filter.rb

Instance Method Summary collapse

Instance Method Details

#amp_with_floor(value) ⇒ Object 



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# File 'lib/fluent/plugin/out_amplifier_filter.rb', line 60

def amp_with_floor(value)
  (value.to_f * @ratio).floor
end

#amp_without_floor(value) ⇒ Object 



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# File 'lib/fluent/plugin/out_amplifier_filter.rb', line 56

def amp_without_floor(value)
  value.to_f * @ratio
end

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_amplifier_filter.rb', line 19

def configure(conf)
  super

  if @key_names.nil? and @key_pattern.nil?
    raise Fluent::ConfigError, "missing both of key_names and key_pattern"
  end
  if not @key_names.nil? and not @key_pattern.nil?
    raise Fluent::ConfigError, "cannot specify both of key_names and key_pattern"
  end
  if @key_names
    @key_names = @key_names.split(',')
  end
  if @key_pattern
    @key_pattern = Regexp.new(@key_pattern)
  end

  amp = if @floor
          method(:amp_with_floor)
        else
          method(:amp_without_floor)
        end
  (class << self; self; end).module_eval do
    define_method(:amp, amp)
  end

  if not @remove_prefix and not @add_prefix
    raise Fluent::ConfigError, "missing both of remove_prefix and add_prefix"
  end
  if @remove_prefix
    @removed_prefix_string = @remove_prefix + '.'
    @removed_length = @removed_prefix_string.length
  end
  if @add_prefix
    @added_prefix_string = @add_prefix + '.'
  end
end

#emit(tag, es, chain) ⇒ Object 



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# File 'lib/fluent/plugin/out_amplifier_filter.rb', line 64

def emit(tag, es, chain)
  if @remove_prefix and
      ( (tag.start_with?(@removed_prefix_string) and tag.length > @removed_length) or tag == @remove_prefix)
    tag = tag[@removed_length..-1]
  end
  if @add_prefix
    tag = if tag and tag.length > 0
            @added_prefix_string + tag
          else
            @add_prefix
          end
  end

  pairs = []
  if @key_names
    es.each {|time,record|
      updated = {}
      @key_names.each {|key|
        val = record[key]
        next unless val
        updated[key] = amp(val)
      }
      log.debug "amplifier tag:#{tag} floor:#{@floor} ratio:#{@ratio} updated:#{updated.to_json} record:#{record.to_json}"
      if updated.size > 0
        pairs.push [time, record.merge(updated)]
      else
        pairs.push [time, record.dup]
      end
    }
  else @key_pattern
    es.each {|time,record|
      updated = {}
      record.keys.each {|key|
        val = record[key]
        next unless val
        next unless @key_pattern.match(key)
        updated[key] = amp(val)
      }
      log.debug "amplifier tag:#{tag} floor:#{@floor} ratio:#{@ratio} updated:#{updated.to_json} record:#{record.to_json}"
      if updated.size > 0
        pairs.push [time, record.merge(updated)]
      else
        pairs.push [time, record.dup]
      end
    }
  end
  router.emit_array(tag, pairs)

  chain.next
end