Class: Fluent::Plugin::TailInput::TailWatcher::FIFO
- Inherits:
-
Object
- Object
- Fluent::Plugin::TailInput::TailWatcher::FIFO
- Defined in:
- lib/fluent/plugin/in_tail.rb
Instance Attribute Summary collapse
-
#buffer ⇒ Object
readonly
Returns the value of attribute buffer.
-
#encoding ⇒ Object
readonly
Returns the value of attribute encoding.
-
#from_encoding ⇒ Object
readonly
Returns the value of attribute from_encoding.
Instance Method Summary collapse
- #<<(chunk) ⇒ Object
- #bytesize ⇒ Object
- #convert(s) ⇒ Object
-
#initialize(from_encoding, encoding) ⇒ FIFO
constructor
A new instance of FIFO.
- #read_lines(lines) ⇒ Object
Constructor Details
#initialize(from_encoding, encoding) ⇒ FIFO
Returns a new instance of FIFO.
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# File 'lib/fluent/plugin/in_tail.rb', line 919 def initialize(from_encoding, encoding) @from_encoding = from_encoding @encoding = encoding @need_enc = from_encoding != encoding @buffer = ''.force_encoding(from_encoding) @eol = "\n".encode(from_encoding).freeze end |
Instance Attribute Details
#buffer ⇒ Object (readonly)
Returns the value of attribute buffer.
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# File 'lib/fluent/plugin/in_tail.rb', line 927 def buffer @buffer end |
#encoding ⇒ Object (readonly)
Returns the value of attribute encoding.
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# File 'lib/fluent/plugin/in_tail.rb', line 927 def encoding @encoding end |
#from_encoding ⇒ Object (readonly)
Returns the value of attribute from_encoding.
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# File 'lib/fluent/plugin/in_tail.rb', line 927 def from_encoding @from_encoding end |
Instance Method Details
#<<(chunk) ⇒ Object
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# File 'lib/fluent/plugin/in_tail.rb', line 929 def <<(chunk) # Although "chunk" is most likely transient besides String#force_encoding itself # won't affect the actual content of it, it is also probable that "chunk" is # a reused buffer and changing its encoding causes some problems on the caller side. # # Actually, the caller here is specific and "chunk" comes from IO#partial with # the second argument, which the function always returns as a return value. # # Feeding a string that has its encoding attribute set to any double-byte or # quad-byte encoding to IO#readpartial as the second arguments results in an # assertion failure on Ruby < 2.4.0 for unknown reasons. orig_encoding = chunk.encoding chunk.force_encoding(from_encoding) @buffer << chunk # Thus the encoding needs to be reverted back here chunk.force_encoding(orig_encoding) end |
#bytesize ⇒ Object
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# File 'lib/fluent/plugin/in_tail.rb', line 971 def bytesize @buffer.bytesize end |
#convert(s) ⇒ Object
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# File 'lib/fluent/plugin/in_tail.rb', line 947 def convert(s) if @need_enc s.encode!(@encoding, @from_encoding) else s end rescue s.encode!(@encoding, @from_encoding, :invalid => :replace, :undef => :replace) end |
#read_lines(lines) ⇒ Object
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# File 'lib/fluent/plugin/in_tail.rb', line 957 def read_lines(lines) idx = @buffer.index(@eol) until idx.nil? # Using freeze and slice is faster than slice! # See https://github.com/fluent/fluentd/pull/2527 @buffer.freeze rbuf = @buffer.slice(0, idx + 1) @buffer = @buffer.slice(idx + 1, @buffer.size) idx = @buffer.index(@eol) lines << convert(rbuf) end end |