Class: TreasureData::Logger::TreasureDataLogger

Inherits:
Fluent::Logger::LoggerBase
  • Object
show all
Defined in:
lib/td/logger/td_logger.rb

Defined Under Namespace

Classes: Buffer

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tag_prefix, options = {}) ⇒ TreasureDataLogger

Returns a new instance of TreasureDataLogger.



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# File 'lib/td/logger/td_logger.rb', line 6

def initialize(tag_prefix, options={})
  defaults = {
    :auto_create_table => false,
  }
  options = defaults.merge!(options)

  @tag_prefix = tag_prefix
  @auto_create_table = !!options[:auto_create_table]

  apikey = options[:apikey]
  unless apikey
    raise ArgumentError, ":apikey options is required"
  end

  debug = !!options[:debug]

  require 'thread'
  require 'stringio'
  require 'zlib'
  require 'msgpack'
  require 'json'
  require 'time'
  require 'net/http'
  require 'cgi'
  require 'logger'
  require 'td-client'

  @logger = ::Logger.new(STDERR)
  if debug
    @logger.level = ::Logger::DEBUG
  else
    @logger.level = ::Logger::INFO
  end

  @client = TreasureData::Client.new(apikey, :ssl => !!options[:use_ssl])

  @mutex = Mutex.new
  @cond = ConditionVariable.new
  @map = {}  # (db,table) => buffer:String
  @queue = []

  @chunk_limit = 8*1024*1024
  @queue_limit = 50

  @flush_interval = 2
  @max_flush_interval = 300
  @retry_wait = 1.0
  @retry_limit = 12

  @finish = false
  @next_time = Time.now.to_i + @flush_interval
  @error_count = 0

  # start thread when the first post() is called for
  # Unicorn and Passenger.
  @upload_thread = nil

  # The calling order of finalizer registered by define_finalizer is indeterminate,
  # so we should use at_exit instead for memory safety.
  at_exit { close }
end

Instance Attribute Details

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/td/logger/td_logger.rb', line 68

def logger
  @logger
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/td/logger/td_logger.rb', line 70

def close
  unless @finish
    @finish = true
    @mutex.synchronize {
      @flush_now = true
      @cond.signal
    }
    @upload_thread.join if @upload_thread

    @queue.reject! {|db,table,data|
      begin
        upload(db, table, data)
        true
      rescue
        @logger.error "Failed to upload event logs to Treasure Data, trashed: #{$!}"
        false
      end
    }
    @map.reject! {|(db,table),buffer|
      data = buffer.flush!
      begin
        upload(db, table, data)
        true
      rescue
        @logger.error "Failed to upload event logs to Treasure Data, trashed: #{$!}"
        false
      end
    }
  end
end

#post_with_time(tag, record, time) ⇒ Object 



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# File 'lib/td/logger/td_logger.rb', line 101

def post_with_time(tag, record, time)
  @logger.debug { "event: #{tag} #{record.to_json}" rescue nil }

  record[:time] ||= time.to_i

  tag = "#{@tag_prefix}.#{tag}" if @tag_prefix
  db, table = tag.split('.')[-2, 2]

  add(db, table, record)
end

#upload_main ⇒ Object 



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# File 'lib/td/logger/td_logger.rb', line 112

def upload_main
  @mutex.lock
  until @finish
    now = Time.now.to_i

    if @next_time <= now || (@flush_now && @error_count == 0)
      flushed = try_flush
      @flush_now = false
    end

    if @error_count == 0
      if flushed && @flush_interval < @max_flush_interval
        @flush_interval = [@flush_interval ** 2, @max_flush_interval].min
      end
      next_wait = @flush_interval
    else
      next_wait = @retry_wait * (2 ** (@error_count-1))
    end
    @next_time = next_wait + now

    cond_wait(next_wait)
  end

rescue
  @logger.error "Unexpected error: #{$!}"
  $!.backtrace.each {|bt|
    @logger.info bt
  }
ensure
  @mutex.unlock
end