Class: Fluent::Plugin::TailInput::FilePositionEntry

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

Overview

pos inode fffffffffffffffftffffffffffffffffn

Constant Summary collapse

POS_SIZE = 
16
INO_OFFSET = 
17
INO_SIZE = 
16
LN_OFFSET = 
33
SIZE = 
34

Instance Method Summary collapse

Constructor Details

#initialize(file, seek) ⇒ FilePositionEntry

Returns a new instance of FilePositionEntry.



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# File 'lib/fluent/plugin/in_tail.rb', line 857

def initialize(file, seek)
  @file = file
  @seek = seek
  @pos = nil
end

Instance Method Details

#read_inode ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 875

def read_inode
  @file.pos = @seek + INO_OFFSET
  raw = @file.read(16)
  raw ? raw.to_i(16) : 0
end

#read_pos ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 881

def read_pos
  @pos ||= begin
    @file.pos = @seek
    raw = @file.read(16)
    raw ? raw.to_i(16) : 0
  end
end

#update(ino, pos) ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 863

def update(ino, pos)
  @file.pos = @seek
  @file.write "%016x\t%016x" % [pos, ino]
  @pos = pos
end

#update_pos(pos) ⇒ Object 



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# File 'lib/fluent/plugin/in_tail.rb', line 869

def update_pos(pos)
  @file.pos = @seek
  @file.write "%016x" % pos
  @pos = pos
end