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

Inherits:
NewTailInput::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

Returns a new instance of IOHandler.



117
118
119
120
121
122
123
124
125
126
 
# File 'lib/fluent/plugin/in_bin.rb', line 117

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 



128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
 
# File 'lib/fluent/plugin/in_bin.rb', line 128

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