2007-09-24 23:47:37 -04:00
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module ActiveSupport
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# Inspired by the buffered logger idea by Ezra
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class BufferedLogger
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module Severity
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DEBUG = 0
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INFO = 1
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WARN = 2
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ERROR = 3
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FATAL = 4
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UNKNOWN = 5
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end
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include Severity
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# Set to false to disable the silencer
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cattr_accessor :silencer
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self.silencer = true
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# Silences the logger for the duration of the block.
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def silence(temporary_level = ERROR)
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if silencer
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begin
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old_logger_level, self.level = level, temporary_level
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yield self
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ensure
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self.level = old_logger_level
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end
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else
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yield self
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end
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end
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attr_accessor :level, :auto_flushing
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attr_reader :buffer
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def initialize(log, level = DEBUG)
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@level = level
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@buffer = ""
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@auto_flushing = true
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if log.respond_to?(:write)
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@log = log
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elsif File.exist?(log)
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@log = open(log, (File::WRONLY | File::APPEND))
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@log.sync = true
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else
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@log = open(log, (File::WRONLY | File::APPEND | File::CREAT))
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@log.sync = true
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@log.write("# Logfile created on %s" % [Time.now.to_s])
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end
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end
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2007-09-25 12:41:46 -04:00
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def add(severity, message = nil, progname = nil, &block)
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return if @level > severity
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message = message || (block && block.call) || progname
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2007-09-27 00:50:58 -04:00
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# If a newline is nessesary then create a new message end with a new line.
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# Ensures that the original message is not mutated.
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message = "#{message}\n" unless message[-1] == ?\n
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2007-09-25 12:41:46 -04:00
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@buffer << message
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flush if auto_flushing
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message
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end
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2007-09-24 23:47:37 -04:00
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for severity in Severity.constants
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class_eval <<-EOT
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2007-09-25 12:41:46 -04:00
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def #{severity.downcase}(message = nil, progname = nil, &block)
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add(#{severity}, message, progname, &block)
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2007-09-24 23:47:37 -04:00
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end
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def #{severity.downcase}?
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@level == #{severity}
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end
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EOT
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end
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def flush
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return if @buffer.size == 0
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@log.write(@buffer.slice!(0..-1))
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end
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def close
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flush
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@log.close if @log.respond_to?(:close)
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@log = nil
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end
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end
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end
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