Class: Fluent::Plugin::S3Output::GzipCommandCompressor

Inherits:
Compressor
  • Object
show all
Defined in:
lib/fluent/plugin/s3_compressor_gzip_command.rb

Instance Attribute Summary

Attributes inherited from Compressor

#buffer_type, #log

Instance Method Summary collapse

Methods inherited from Compressor

#initialize

Constructor Details

This class inherits a constructor from Fluent::Plugin::S3Output::Compressor

Instance Method Details

#compress(chunk, tmp) ⇒ Object 



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# File 'lib/fluent/plugin/s3_compressor_gzip_command.rb', line 21

def compress(chunk, tmp)
  if @buffer_compressed_type == :gzip
    chunk.write_to(tmp, compressed: @buffer_compressed_type)
    return
  end

  chunk_is_file = @buffer_type == 'file'
  path = if chunk_is_file
           chunk.path
         else
           w = Tempfile.new("chunk-gzip-tmp")
           w.binmode
           chunk.write_to(w)
           w.close
           w.path
         end

  res = system "gzip #{@command_parameter} -c #{path} > #{tmp.path}"
  unless res
    log.warn "failed to execute gzip command. Fallback to GzipWriter. status = #{$?}"
    begin
      tmp.truncate(0)
      gw = Zlib::GzipWriter.new(tmp)
      chunk.write_to(gw)
      gw.close
    ensure
      gw.close rescue nil
    end
  end
ensure
  unless chunk_is_file
    w.close(true) rescue nil
  end
end

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/s3_compressor_gzip_command.rb', line 8

def configure(conf)
  super
  check_command('gzip')
end

#content_type ⇒ Object 



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# File 'lib/fluent/plugin/s3_compressor_gzip_command.rb', line 17

def content_type
  'application/x-gzip'.freeze
end

#ext ⇒ Object 



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# File 'lib/fluent/plugin/s3_compressor_gzip_command.rb', line 13

def ext
  'gz'.freeze
end