Class: Fluent::Logger::FluentLogger

Inherits:
LoggerBase show all
Defined in:
lib/fluent/logger/fluent_logger.rb,
lib/fluent/logger/fluent_logger/cui.rb

Defined Under Namespace

Modules: CUI

Constant Summary collapse

BUFFER_LIMIT =
8*1024*1024
RECONNECT_WAIT =
0.5
RECONNECT_WAIT_INCR_RATE =
1.5
RECONNECT_WAIT_MAX =
60
RECONNECT_WAIT_MAX_COUNT =
(1..100).inject(RECONNECT_WAIT_MAX / RECONNECT_WAIT) { |r, i|
  break i + 1 if r < RECONNECT_WAIT_INCR_RATE
  r / RECONNECT_WAIT_INCR_RATE
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from LoggerBase

open, #post

Constructor Details

#initialize(tag_prefix = nil, *args) ⇒ FluentLogger

Returns a new instance of FluentLogger


62
63
64
65
66
67
68
69
70
71
72
73
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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
# File 'lib/fluent/logger/fluent_logger.rb', line 62

def initialize(tag_prefix = nil, *args)
  super()

  options = {
    :host => 'localhost',
    :port => 24224
  }

  case args.first
  when String, Symbol
    # backward compatible
    options[:host] = args[0]
    options[:port] = args[1] if args[1]
  when Hash
    options.update args.first
  end

  @tag_prefix = tag_prefix
  @host = options[:host]
  @port = options[:port]
  @socket_path = options[:socket_path]
  @nanosecond_precision = options[:nanosecond_precision]

  @factory = MessagePack::Factory.new
  if @nanosecond_precision
    @factory.register_type(EventTime::TYPE, EventTime)
  end
  @packer = @factory.packer

  @mon = Monitor.new
  @pending = nil
  @connect_error_history = []

  @limit = options[:buffer_limit] || BUFFER_LIMIT
  @log_reconnect_error_threshold = options[:log_reconnect_error_threshold] || RECONNECT_WAIT_MAX_COUNT

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

  @last_error = {}

  begin
    connect!
  rescue => e
    set_last_error(e)
    @logger.error "Failed to connect fluentd: #{$!}"
    @logger.error "Connection will be retried."
  end

  at_exit { close }
end

Instance Attribute Details

#last_errorObject (readonly)

Returns the value of attribute last_error


124
125
126
# File 'lib/fluent/logger/fluent_logger.rb', line 124

def last_error
  @last_error
end

#limitObject

Returns the value of attribute limit


123
124
125
# File 'lib/fluent/logger/fluent_logger.rb', line 123

def limit
  @limit
end

#log_reconnect_error_thresholdObject

Returns the value of attribute log_reconnect_error_threshold


123
124
125
# File 'lib/fluent/logger/fluent_logger.rb', line 123

def log_reconnect_error_threshold
  @log_reconnect_error_threshold
end

#loggerObject

Returns the value of attribute logger


123
124
125
# File 'lib/fluent/logger/fluent_logger.rb', line 123

def logger
  @logger
end

Instance Method Details

#closeObject


140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
# File 'lib/fluent/logger/fluent_logger.rb', line 140

def close
  @mon.synchronize {
    if @pending
      begin
        send_data(@pending)
      rescue => e
        set_last_error(e)
        @logger.error("FluentLogger: Can't send logs to #{connection_string}: #{$!}")
        call_buffer_overflow_handler(@pending)
      end
    end
    @con.close if connect?
    @con = nil
    @pending = nil
  }
  self
end

#connect?Boolean

Returns:

  • (Boolean)

158
159
160
# File 'lib/fluent/logger/fluent_logger.rb', line 158

def connect?
  @con && !@con.closed?
end

#connection_stringObject


170
171
172
# File 'lib/fluent/logger/fluent_logger.rb', line 170

def connection_string
  @socket_path ? "#{@socket_path}" : "#{@host}:#{@port}"
end

#create_socket!Object


162
163
164
165
166
167
168
# File 'lib/fluent/logger/fluent_logger.rb', line 162

def create_socket!
  if @socket_path
    @con = UNIXSocket.new(@socket_path)
  else
    @con = TCPSocket.new(@host, @port)
  end
end

#pending_bytesizeObject


174
175
176
177
178
179
180
# File 'lib/fluent/logger/fluent_logger.rb', line 174

def pending_bytesize
  if @pending
    @pending.bytesize
  else
    0
  end
end

#post_with_time(tag, map, time) ⇒ Object


130
131
132
133
134
135
136
137
138
# File 'lib/fluent/logger/fluent_logger.rb', line 130

def post_with_time(tag, map, time)
  @logger.debug { "event: #{tag} #{map.to_json}" rescue nil } if @logger.debug?
  tag = "#{@tag_prefix}.#{tag}" if @tag_prefix
  if @nanosecond_precision && time.is_a?(Time)
    write [tag, EventTime.new(time.to_i, time.nsec), map]
  else
    write [tag, time.to_i, map]
  end
end