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.



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
 
# 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

  # translate :use_ssl to :ssl for backwards compatibility
  options[:ssl] = options[:use_ssl] unless options[:use_ssl].nil?
  @client = TreasureData::Client.new(apikey, options)

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

  @chunk_limit = options[:chunk_limit] || 8 * 1024 * 1024
  @queue_limit = 50

  @flush_interval = options[:flush_interval] || 2
  @max_flush_interval = options[: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

  @use_unique_key = options[:use_unique_key]

  # 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.



72
73
74
 
# File 'lib/td/logger/td_logger.rb', line 72

def logger
  @logger
end

Instance Method Details

#close ⇒ Object 



74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
 
# File 'lib/td/logger/td_logger.rb', line 74

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

#flush ⇒ Object 



105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# File 'lib/td/logger/td_logger.rb', line 105

def flush
  @mutex.lock

  # Move small chunks into queue to flush all events.
  # See try_flush routine for more detail
  @map.reject! {|(db,table),buffer|
    data = buffer.flush!
    @queue << [db, table, data]
  }
  try_flush
rescue => e
  @logger.error "Unexpected error at flush: #{e}"
  e.backtrace.each {|bt|
    @logger.info bt
  }
ensure
  @mutex.unlock
end

#post_with_time(tag, record, time) ⇒ Object 



124
125
126
127
128
129
130
131
132
133
 
# File 'lib/td/logger/td_logger.rb', line 124

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 



135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
 
# File 'lib/td/logger/td_logger.rb', line 135

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