Class: Fluent::Logger::FluentLogger

Inherits:
LoggerBase show all
Extended by:
Finalizable
Defined in:
lib/fluent/logger/fluent_logger.rb

Defined Under Namespace

Modules: Finalizable

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 included from Finalizable

finalizer, new

Methods inherited from LoggerBase

open

Constructor Details

#initialize(tag_prefix, *args) ⇒ FluentLogger

Returns a new instance of FluentLogger.



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# File 'lib/fluent/logger/fluent_logger.rb', line 58

def initialize(tag_prefix, *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]

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

  @limit = options[:buffer_limit] || BUFFER_LIMIT
  @logger = options[:logger] || ::Logger.new(STDERR)

  begin
    connect!
  rescue
    @logger.error "Failed to connect fluentd: #{$!}"
    @logger.error "Connection will be retried."
  end
end

Instance Attribute Details

#limit ⇒ Object

Returns the value of attribute limit.



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# File 'lib/fluent/logger/fluent_logger.rb', line 94

def limit
  @limit
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/fluent/logger/fluent_logger.rb', line 94

def logger
  @logger
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/fluent/logger/fluent_logger.rb', line 102

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

#connect? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/logger/fluent_logger.rb', line 118

def connect?
  !!@con
end

#finalize ⇒ Object 



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# File 'lib/fluent/logger/fluent_logger.rb', line 122

def finalize
  close
end

#post(tag, map, time = nil) ⇒ Object 



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# File 'lib/fluent/logger/fluent_logger.rb', line 96

def post(tag, map, time=nil)
  time ||= Time.now
  tag = "#{@tag_prefix}.#{tag}" if @tag_prefix
  write [tag, time.to_i, map]
end