Class: Fluent::FileAlternativeOutput

Inherits:
TimeSlicedOutput
  • Object
show all
Includes:
Mixin::PlainTextFormatter
Defined in:
lib/fluent/plugin/out_file_alternative.rb

Constant Summary collapse

SUPPORTED_COMPRESS = 
{
  :gz => :gz,
  :gzip => :gz,
}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ FileAlternativeOutput

Returns a new instance of FileAlternativeOutput.



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 32

def initialize
  super
  require 'time'
  require 'zlib'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 38

def configure(conf)
  if conf['path']
    if conf['path'].index('%S')
      conf['time_slice_format'] = '%Y%m%d%H%M%S'
    elsif conf['path'].index('%M')
      conf['time_slice_format'] = '%Y%m%d%H%M'
    elsif conf['path'].index('%H')
      conf['time_slice_format'] = '%Y%m%d%H'
    end
  end
  if pos = (conf['path'] || '').index('*')
    @path_prefix = conf['path'][0,pos]
    @path_suffix = conf['path'][pos+1..-1]
    conf['buffer_path'] ||= "#{conf['path']}"
  elsif (conf['path'] || '%Y') !~ /%Y|%m|%d|%H|%M|%S/
    if conf['path'] =~ /\.log\Z/
      @path_prefix = conf['path'][0..-4]
      @path_suffix = ".log"
    else
      @path_prefix = conf['path'] + "."
      @path_suffix = ".log"
    end
    conf['buffer_path'] ||= "#{conf['path']}.*"
  elsif (conf['path'] || '') =~ /%Y|%m|%d|%H|%M|%S/
    conf['buffer_path'] ||= conf['path'].gsub('%Y','yyyy').gsub('%m','mm').gsub('%d','dd').gsub('%H','HH').gsub('%M','MM').gsub('%S','SS')
  end

  super

  unless @path.index('/') == 0
    raise Fluent::ConfigError, "Path on filesystem MUST starts with '/', but '#{@path}'"
  end

  if @symlink_path
    unless @symlink_path.index('/') == 0
      raise Fluent::ConfigError, "Symlink path on filesystem MUST starts with '/', but '#{@symlink_path}'"
    end
    @buffer.symlink_path = @symlink_path
  end
end

#path_format(chunk_key) ⇒ Object

def format(tag, time, record) end



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 96

def path_format(chunk_key)
  suffix = case @compress
           when :gz
             '.gz'
           else
             ''
           end
  if @path_prefix and @path_suffix
    if @compress
      i = 0
      begin
        path = "#{@path_prefix}#{chunk_key}_#{i}#{@path_suffix}#{suffix}"
        i += 1
      end while File.exist?(path)
      path
    else
      "#{@path_prefix}#{chunk_key}#{@path_suffix}#{suffix}"
    end
  else
    if @compress
      path_base = Time.strptime(chunk_key, @time_slice_format).strftime(@path)
      path = path_base + suffix
      if File.exist?(path)
        i = 0
        begin
          path = "#{path_base}.#{i}#{suffix}"
          i += 1
        end while File.exist?(path)
      end
      path
    else
      Time.strptime(chunk_key, @time_slice_format).strftime(@path)
    end
  end
end

#record_to_string(record) ⇒ Object 



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 89

def record_to_string(record)
  record.to_json
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 84

def shutdown
  super
  # destroy
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 79

def start
  super
  # init
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_file_alternative.rb', line 132

def write(chunk)
  path = path_format(chunk.key)

  begin
    FileUtils.mkdir_p File.dirname(path)

    case @compress
    when :gz
      Zlib::GzipWriter.open(path) {|f|
        chunk.write_to(f)
      }
    else
      File.open(path, "a") {|f|
        chunk.write_to(f)
      }
    end
  rescue
    log.error "failed to write data: path #{path}"
    raise
  end
  path
end