Class: Fluent::Plugin::TailInput::TailWatcher::IOHandler

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

Constant Summary collapse

BYTES_TO_READ = 
8192
SHUTDOWN_TIMEOUT = 
5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(watcher, path:, read_lines_limit:, read_bytes_limit_per_second:, log:, open_on_every_update:, from_encoding: nil, encoding: nil, metrics:, &receive_lines) ⇒ IOHandler

Returns a new instance of IOHandler.



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# File 'lib/fluent/plugin/in_tail.rb', line 976

def initialize(watcher, path:, read_lines_limit:, read_bytes_limit_per_second:, log:, open_on_every_update:, from_encoding: nil, encoding: nil, metrics:, &receive_lines)
  @watcher = watcher
  @path = path
  @read_lines_limit = read_lines_limit
  @read_bytes_limit_per_second = read_bytes_limit_per_second
  @receive_lines = receive_lines
  @open_on_every_update = open_on_every_update
  @fifo = FIFO.new(from_encoding || Encoding::ASCII_8BIT, encoding || Encoding::ASCII_8BIT)
  @iobuf = ''.force_encoding('ASCII-8BIT')
  @lines = []
  @io = nil
  @notify_mutex = Mutex.new
  @log = log
  @start_reading_time = nil
  @number_bytes_read = 0
  @shutdown_start_time = nil
  @shutdown_timeout = SHUTDOWN_TIMEOUT
  @shutdown_mutex = Mutex.new
  @eof = false
  @metrics = metrics

  @log.info "following tail of #{@path}"
end

Instance Attribute Details

#shutdown_timeout ⇒ Object

Returns the value of attribute shutdown_timeout.



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# File 'lib/fluent/plugin/in_tail.rb', line 974

def shutdown_timeout
  @shutdown_timeout
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 1011

def close
  if @io && !@io.closed?
    @io.close
    @io = nil
    @metrics.closed.inc
  end
end

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/in_tail.rb', line 1023

def eof?
  @eof
end

#on_notify ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 1000

def on_notify
  @notify_mutex.synchronize { handle_notify }
end

#opened? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/in_tail.rb', line 1019

def opened?
  !!@io
end

#ready_to_shutdown(shutdown_start_time = nil) ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 1004

def ready_to_shutdown(shutdown_start_time = nil)
  @shutdown_mutex.synchronize {
    @shutdown_start_time =
      shutdown_start_time || Fluent::Clock.now
  }
end