Class: Fluent::Plugin::ConcatFilter

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

Defined Under Namespace

Classes: TimeoutError

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ConcatFilter

Returns a new instance of ConcatFilter.



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# File 'lib/fluent/plugin/filter_concat.rb', line 43

def initialize
  super

  @buffer = Hash.new {|h, k| h[k] = [] }
  @timeout_map_mutex = Thread::Mutex.new
  @timeout_map_mutex.synchronize do
    @timeout_map = Hash.new {|h, k| h[k] = Fluent::Engine.now }
  end
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/filter_concat.rb', line 53

def configure(conf)
  super

  if @n_lines.nil? && @multiline_start_regexp.nil? && @multiline_end_regexp.nil? && @partial_key.nil? && !@use_partial_metadata
    raise Fluent::ConfigError, "Either n_lines, multiline_start_regexp, multiline_end_regexp, partial_key or use_partial_metadata is required"
  end
  if @n_lines && (@multiline_start_regexp || @multiline_end_regexp)
    raise Fluent::ConfigError, "n_lines and multiline_start_regexp/multiline_end_regexp are exclusive"
  end
  if @partial_key && @n_lines
    raise Fluent::ConfigError, "partial_key and n_lines are exclusive"
  end
  if @partial_key && (@multiline_start_regexp || @multiline_end_regexp)
    raise Fluent::ConfigError, "partial_key and multiline_start_regexp/multiline_end_regexp are exclusive"
  end
  if @partial_key && @partial_value.nil?
    raise Fluent::ConfigError, "partial_value is required when partial_key is specified"
  end
  if @use_partial_metadata && @n_lines
    raise Fluent::ConfigError, "user_partial_metadata and n_lines are exclusive"
  end
  if @use_partial_metadata && (@multiline_start_regexp || @multiline_end_regexp)
    raise Fluent::ConfigError, "user_partial_metadata and multiline_start_regexp/multiline_end_regexp are exclusive"
  end
  if @use_partial_metadata && @partial_key
    raise Fluent::ConfigError, "user_partial_metadata and partial_key are exclusive"
  end

  @mode = nil
  case
  when @n_lines
    @mode = :line
  when @partial_key
    @mode = :partial
  when @use_partial_metadata
    @mode = :partial_metadata
  when @multiline_start_regexp || @multiline_end_regexp
    @mode = :regexp
    if @multiline_start_regexp
      @multiline_start_regexp = Regexp.compile(@multiline_start_regexp[1..-2])
    end
    if @multiline_end_regexp
      @multiline_end_regexp = Regexp.compile(@multiline_end_regexp[1..-2])
    end
    if @continuous_line_regexp
      @continuous_line_regexp = Regexp.compile(@continuous_line_regexp[1..-2])
    end
  end
end

#filter_stream(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/filter_concat.rb', line 115

def filter_stream(tag, es)
  new_es = Fluent::MultiEventStream.new
  es.each do |time, record|
    if /\Afluent\.(?:trace|debug|info|warn|error|fatal)\z/ =~ tag
      new_es.add(time, record)
      next
    end
    unless record.key?(@key)
      new_es.add(time, record)
      next
    end
    if @mode == :partial
      unless record.key?(@partial_key)
        new_es.add(time, record)
        next
      end
    end
    if @mode == :partial_metadata
      unless record.key?("partial_message")
        new_es.add(time, record)
        next
      end
    end
    begin
      flushed_es = process(tag, time, record)
      unless flushed_es.empty?
        flushed_es.each do |_time, new_record|
          time = _time if @use_first_timestamp
          merged_record = record.merge(new_record)
          case @mode
          when :partial
            merged_record.delete(@partial_key) unless @keep_partial_key
          when :partial_metadata
            unless @keep_partial_metadata
              merged_record.delete("partial_message")
              merged_record.delete("partial_id")
              merged_record.delete("partial_ordinal")
              merged_record.delete("partial_last")
            end
          end
          new_es.add(time, merged_record)
        end
      end
    rescue => e
      router.emit_error_event(tag, time, record, e)
    end
  end
  new_es
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/filter_concat.rb', line 109

def shutdown
  @finished = true
  flush_remaining_buffer
  super
end

#start ⇒ Object 



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

def start
  super
  @finished = false
  timer_execute(:filter_concat_timer, 1, &method(:on_timer))
end