Class: Fluent::ScribeOutput

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ScribeOutput

Returns a new instance of ScribeOutput.



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# File 'lib/fluent/plugin/out_scribe.rb', line 37

def initialize
  require 'thrift'
  $:.unshift File.join(File.dirname(__FILE__), 'thrift')
  require 'fb303_types'
  require 'fb303_constants'
  require 'facebook_service'
  require 'scribe_types'
  require 'scribe_constants'
  require 'scribe'
  super
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_scribe.rb', line 49

def configure(conf)
  # override default buffer_chunk_limit
  conf['buffer_chunk_limit'] ||= '1m'

  super
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_scribe.rb', line 69

def format(tag, time, record)
  if @remove_prefix and
      ( (tag[0, @removed_length] == @removed_prefix_string and tag.length > @removed_length) or
      tag == @remove_prefix)
    [(tag[@removed_length..-1] || @default_category), record].to_msgpack
  else
    [tag, record].to_msgpack
  end
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_scribe.rb', line 65

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_scribe.rb', line 56

def start
  super

  if @remove_prefix
    @removed_prefix_string = @remove_prefix + '.'
    @removed_length = @removed_prefix_string.length
  end
end

#write(chunk) ⇒ Object 



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

def write(chunk)
  socket = Thrift::Socket.new @host, @port, @timeout
  transport = Thrift::FramedTransport.new socket
  protocol = Thrift::BinaryProtocol.new transport, false, false
  client = Scribe::Client.new protocol

  transport.open
  begin
    entries = []

    chunk.msgpack_each do |arr|
      tag, record = arr
      next unless @format_to_json || record.has_key?(@field_ref)

      message = @format_to_json ? record : record[@field_ref]

      if message.kind_of?(Array) or message.kind_of?(Hash)
        begin
          message = message.to_json
        rescue => e
          if @ignore_invalid_record
            # This warning can be disabled by 'log_level error'
            log.warn "got invalid message", message: message, error: e, error_class: e.class
            next
          else
            # Keep existence behaviour
            raise
          end
        end
      end

      if @add_newline
        message = message + "\n"
      end

      entry = LogEntry.new
      entry.category = tag
      entry.message = message.force_encoding('ASCII-8BIT')

      entries << entry
    end

    log.debug "Writing #{entries.count} entries to scribe"
    client.Log(entries)
  ensure
    transport.close
  end
end