Class: Fluent::Plugin::RecordsMergerOutput

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

Overview

fluentd records merger

Defined Under Namespace

Classes: PlaceholderExpander

Constant Summary collapse

PATTERN_MAX_NUM = 
20

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_records_merger.rb', line 50

def configure(conf)
  super
  # conf: {"@type"=>"records_merger", "tag"=>"merged1", "main_tag"=>"accesslog.1.main", "sub_tag1"=>"accesslog.1.sub1", "sub_tag2"=>"accesslog.1.sub2"}, []
  @tag = conf['tag'] # これも，結局 ${tag} とかを有効にする関係で使わなくなりそう．
  # set the tags set by the user
  @last_records = {}
  @main_tag = conf['main_tag']

  @sub_tags = []
  (1..PATTERN_MAX_NUM).each do |i|
    next unless conf["sub_tag#{i}"]

    @sub_tags.push(conf["sub_tag#{i}"])
  end

  if conf['merge_timing']
    @merge_timing = conf['merge_timing']
  end

  @tolerable_time_range = conf['tolerable_time_range'].to_i

  @flags4merge = Array.new(@sub_tags.size + 1, 0)
  @force_emit = conf['force_emit']

  # from out-record-reformer
  map = {}
  conf.elements.select { |element| element.name == 'record' }.each do |element|
    element.each_pair do |k, v|
      element.key?(k) # to suppress unread configuration warning
      map[k] = parse_value(v)
    end
  end

  placeholder_expander_params = {
    log: log,
    auto_typecast: @auto_typecast
  }
  @placeholder_expander = PlaceholderExpander.new(placeholder_expander_params)
  @map = @placeholder_expander.preprocess_map(map)
  @tag = @placeholder_expander.preprocess_map(@tag)
  @hostname = Socket.gethostname
  @condition = conf['condition']
  @keep_records = conf['keep_records']
end

#process(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/out_records_merger.rb', line 103

def process(tag, es)
  if @merge_timing == 'before'
    if @main_tag == tag
      store_to_lastrecords(tag, es)
      @flags4merge[0] = 1
      check_timegap if @tolerable_time_range > 0
      emit_new_event(es) if @flags4merge.all? { |flag| flag == 1 }
    elsif @sub_tags.include?(tag)
      store_to_lastrecords(tag, es)
      @flags4merge[@sub_tags.index(tag) + 1] = 1
      check_timegap if @tolerable_time_range > 0
    end
  elsif @merge_timing == 'after'
    if @main_tag == tag
      store_to_lastrecords(tag, es)
      @flags4merge[0] = 1
      check_timegap if @tolerable_time_range > 0
    elsif @sub_tags.include?(tag)
      if @flags4merge[0] == 1
        store_to_lastrecords(tag, es)
        @flags4merge[@sub_tags.index(tag) + 1] = 1
        check_timegap if @tolerable_time_range > 0
        emit_new_event(es) if @flags4merge.all? {|flag| flag == 1}
      end
    else
      p 'something else has come! check it!' + tag.to_s
    end
  elsif @merge_timing == 'simple'
    if @main_tag == tag
      store_to_lastrecords(tag, es)
      @flags4merge[0] = 1
      check_timegap if @tolerable_time_range > 0
      emit_new_event(es) if @flags4merge.all? { |flag| flag == 1 }
    elsif @sub_tags.include?(tag)
      store_to_lastrecords(tag, es)
      @flags4merge[@sub_tags.index(tag) + 1] = 1
      check_timegap if @tolerable_time_range > 0
      emit_new_event(es) if @flags4merge.all? { |flag| flag == 1 }
    else
      p 'something else has come! check it!' + tag.to_s
    end
  end
rescue StandardError => e
  log.warn "record_reformer: #{e.class} #{e.message} #{e.backtrace.first}"
  log.debug "record_reformer: tag:#{@tag} map:#{@map} record:#{@last_records} placeholder_values"
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_records_merger.rb', line 99

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_records_merger.rb', line 95

def start
  super
end