Class: Librato::Rack::Logger

Inherits:
Object
  • Object
show all
Defined in:
lib/librato/rack/logger.rb

Overview

Wraps an available logger object and provides convenience methods for logging using a separate set of log levels

Constant Summary collapse

LOG_LEVELS = 
[:off, :error, :warn, :info, :debug, :trace]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(outlet = nil) ⇒ Logger

Returns a new instance of Logger.



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# File 'lib/librato/rack/logger.rb', line 14

def initialize(outlet=nil)
  @buffer = []
  self.outlet = outlet
  self.prefix = ''
end

Instance Attribute Details

#outlet ⇒ Object

Returns the value of attribute outlet.



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# File 'lib/librato/rack/logger.rb', line 12

def outlet
  @outlet
end

#prefix ⇒ Object

Returns the value of attribute prefix.



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# File 'lib/librato/rack/logger.rb', line 11

def prefix
  @prefix
end

Instance Method Details

#log(level, message = nil, &block) ⇒ Object

Examples:

Simple logging

log :debug, 'this is a debug message'

Block logging - not executed if won’t be logged

log(:debug) { "found #{thingy} at #{place}" }


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# File 'lib/librato/rack/logger.rb', line 26

def log(level, message=nil, &block)
  return unless should_log?(level)
  message = prefix + (message || block.call)
  if outlet.nil?
    buffer(level, message)
  else
    write_to_outlet(level, message)
  end
end

#log_level ⇒ Object 



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# File 'lib/librato/rack/logger.rb', line 47

def log_level
  @log_level ||= :info
end

#log_level=(level) ⇒ Object

set log level to any of LOG_LEVELS



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# File 'lib/librato/rack/logger.rb', line 37

def log_level=(level)
  level = level.to_sym
  if LOG_LEVELS.index(level)
    @log_level = level
    require 'pp' if should_log?(:debug)
  else
    raise InvalidLogLevel, "Invalid log level '#{level}'"
  end
end