Class: Fluent::NumericTimeParser

Inherits:
TimeParser show all
Defined in:
lib/fluent/time.rb

Overview

to include TimeParseError

Instance Method Summary collapse

Methods inherited from TimeParser

#parse

Constructor Details

#initialize(type, localtime = nil, timezone = nil) ⇒ NumericTimeParser

Returns a new instance of NumericTimeParser.



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# File 'lib/fluent/time.rb', line 245

def initialize(type, localtime = nil, timezone = nil)
  @cache1_key = @cache1_time = @cache2_key = @cache2_time = nil

  if type == :unixtime
    define_singleton_method(:parse, method(:parse_unixtime))
    define_singleton_method(:call, method(:parse_unixtime))
  else # :float
    define_singleton_method(:parse, method(:parse_float))
    define_singleton_method(:call, method(:parse_float))
  end
end

Instance Method Details

#parse_float(value) ⇒ Object

rough benchmark result to compare handmade parser vs Fluent::EventTime.from_time(Time.at(value.to_r)) full: with 9-digits of nsec after dot msec: with 3-digits of msec after dot 10_000_000 times loop on MacBookAir parse_by_myself(full): 12.162475 sec parse_by_myself(msec): 15.050435 sec parse_by_to_r (full): 28.722362 sec parse_by_to_r (msec): 28.232856 sec



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# File 'lib/fluent/time.rb', line 288

def parse_float(value)
  unless value.is_a?(String) || value.is_a?(Numeric)
    raise TimeParseError, "value must be a string or a number: #{value}(value.class)"
  end

  if @cache1_key == value
    return @cache1_time
  elsif @cache2_key == value
    return @cache2_time
  end

  begin
    sec_s, nsec_s, _ = value.to_s.split('.', 3) # throw away second-dot and later
    nsec_s = nsec_s && nsec_s[0..9] || '0'
    nsec_s += '0' * (9 - nsec_s.size) if nsec_s.size < 9
    time = Fluent::EventTime.new(sec_s.to_i, nsec_s.to_i)
  rescue => e
    raise TimeParseError, "invalid time format: value = #{value}, error_class = #{e.class.name}, error = #{e.message}"
  end
  @cache1_key = @cache2_key
  @cache1_time = @cache2_time
  @cache2_key = value
  @cache2_time = time
  time
end

#parse_unixtime(value) ⇒ Object 



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# File 'lib/fluent/time.rb', line 257

def parse_unixtime(value)
  unless value.is_a?(String) || value.is_a?(Numeric)
    raise TimeParseError, "value must be a string or a number: #{value}(value.class)"
  end

  if @cache1_key == value
    return @cache1_time
  elsif @cache2_key == value
    return @cache2_time
  end

  begin
    time = Fluent::EventTime.new(value.to_i)
  rescue => e
    raise TimeParseError, "invalid time format: value = #{value}, error_class = #{e.class.name}, error = #{e.message}"
  end
  @cache1_key = @cache2_key
  @cache1_time = @cache2_time
  @cache2_key = value
  @cache2_time = time
  time
end