Class: Plugin::InfluxdbDeduplicationFilter

Inherits:
Filter
  • Object
show all
Defined in:
lib/fluent/plugin/filter_influxdb_deduplication.rb

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/filter_influxdb_deduplication.rb', line 17

def configure(conf)
  super

  unless @time_key
    raise Fluent::ConfigError, "a time key must be set"
  end
end

#filter(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/filter_influxdb_deduplication.rb', line 32

def filter(tag, time, record)
  if time.is_a?(Integer)
    input_time = Fluent::EventTime.new(time)
  elsif time.is_a?(Fluent::EventTime)
    input_time = time
  else
    @log.error("unreadable time")
    return nil
  end

  nano_time = input_time.sec * 1000000000

  if input_time.sec < @last_timestamp
    @log.debug("out of sequence timestamp")
    if @out_of_order
      record[@out_of_order] = true
      record[@time_key] = nano_time
    else
      @log.debug("out of order record dropped")
      return nil
    end
  elsif input_time.sec == @last_timestamp && @sequence < 999999999
    @sequence = @sequence + 1
    record[@time_key] = nano_time + @sequence
    if @out_of_order
      record[@out_of_order] = false
    end
  elsif input_time.sec == @last_timestamp && @sequence == 999999999
    @log.error("received more then 999999999 records in a second")
    return nil
  else
    @sequence = 0
    @last_timestamp = input_time.sec
    record[@time_key] = nano_time
    if @out_of_order
      record[@out_of_order] = false
    end
  end

  record
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/filter_influxdb_deduplication.rb', line 25

def start
  super

  @last_timestamp = 0
  @sequence = 0
end