Inspired by the buffered logger idea by Ezra

Methods
Included Modules
Classes and Modules
Module ActiveSupport::BufferedLogger::Severity
Constants
MAX_BUFFER_SIZE = 1000
Attributes
[R] auto_flushing
[RW] level
Public Class methods
new(log, level = DEBUG)

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    # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 37
37:     def initialize(log, level = DEBUG)
38:       @level         = level
39:       @buffer        = {}
40:       @auto_flushing = 1
41:       @guard = Mutex.new
42: 
43:       if log.respond_to?(:write)
44:         @log = log
45:       elsif File.exist?(log)
46:         @log = open(log, (File::WRONLY | File::APPEND))
47:         @log.sync = true
48:       else
49:         FileUtils.mkdir_p(File.dirname(log))
50:         @log = open(log, (File::WRONLY | File::APPEND | File::CREAT))
51:         @log.sync = true
52:         @log.write("# Logfile created on %s" % [Time.now.to_s])
53:       end
54:     end
Public Instance methods
add(severity, message = nil, progname = nil, &block)

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    # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 56
56:     def add(severity, message = nil, progname = nil, &block)
57:       return if @level > severity
58:       message = (message || (block && block.call) || progname).to_s
59:       # If a newline is necessary then create a new message ending with a newline.
60:       # Ensures that the original message is not mutated.
61:       message = "#{message}\n" unless message[-1] == ?\n
62:       buffer << message
63:       auto_flush
64:       message
65:     end
auto_flushing=(period)

Set the auto-flush period. Set to true to flush after every log message, to an integer to flush every N messages, or to false, nil, or zero to never auto-flush. If you turn auto-flushing off, be sure to regularly flush the log yourself — it will eat up memory until you do.

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    # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 84
84:     def auto_flushing=(period)
85:       @auto_flushing =
86:         case period
87:         when true;                1
88:         when false, nil, 0;       MAX_BUFFER_SIZE
89:         when Integer;             period
90:         else raise ArgumentError, "Unrecognized auto_flushing period: #{period.inspect}"
91:         end
92:     end
close()

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     # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 104
104:     def close
105:       flush
106:       @log.close if @log.respond_to?(:close)
107:       @log = nil
108:     end
flush()

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     # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 94
 94:     def flush
 95:       @guard.synchronize do
 96:         unless buffer.empty?
 97:           old_buffer = buffer
 98:           clear_buffer
 99:           @log.write(old_buffer.join)
100:         end
101:       end
102:     end
silence(temporary_level = ERROR) {|self| ...}

Silences the logger for the duration of the block.

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    # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 21
21:     def silence(temporary_level = ERROR)
22:       if silencer
23:         begin
24:           old_logger_level, self.level = level, temporary_level
25:           yield self
26:         ensure
27:           self.level = old_logger_level
28:         end
29:       else
30:         yield self
31:       end
32:     end
Protected Instance methods
auto_flush()

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     # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 111
111:       def auto_flush
112:         flush if buffer.size >= @auto_flushing
113:       end
buffer()

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     # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 115
115:       def buffer
116:         @buffer[Thread.current] ||= []
117:       end
clear_buffer()

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     # File vendor/rails/activesupport/lib/active_support/buffered_logger.rb, line 119
119:       def clear_buffer
120:         @buffer.delete(Thread.current)
121:       end