Class: Fluent::Plugin::BinInput::TailWatcher::IOHandler

Inherits:
TailInput::TailWatcher::IOHandler
  • Object
show all
Defined in:
lib/fluent/plugin/in_bin.rb

Instance Method Summary collapse

Constructor Details

#initialize(io, pe, log, read_lines_limit, first = true, &receive_lines) ⇒ IOHandler 



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# File 'lib/fluent/plugin/in_bin.rb', line 120

def initialize(io, pe, log, read_lines_limit, first = true, &receive_lines)
  @log = log
  @log.info "following #{io.path}" if first
  @io = io
  @pe = pe
  @read_lines_limit = read_lines_limit
  @receive_lines = receive_lines
  @lines = []
  @io.binmode
end

Instance Method Details

#on_notify ⇒ Object 



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# File 'lib/fluent/plugin/in_bin.rb', line 131

def on_notify
  begin
    read_more = false

    if @lines.empty?
      begin
        while true
          @lines << @io.readpartial(2048)
          if @lines.size >= @read_lines_limit
            # not to use too much memory in case the file is very large
            read_more = true
            break
          end
        end
      rescue EOFError
      end
    end

    unless @lines.empty?
      if @receive_lines.call(@lines)
        @pe.update_pos(@io.pos)
        @lines.clear
      else
        read_more = false
      end
    end
  end while read_more

rescue
  @log.error $!.to_s
  @log.error_backtrace
  close
end