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Contents
require 'thread'
module Vagrant
module Util
# Represents a logger for a specific resource within Vagrant. Each
# logger should be initialized and set to represent a single
# resource. Each logged message will then appear in the following
# format:
#
# [resource] message
#
# This class is thread safe. The backing class which actually does
# all the logging IO is protected.
class ResourceLogger
@@singleton_logger = nil
@@writer_lock = Mutex.new
# The resource which this logger represents.
attr_reader :resource
# The environment that this logger is part of
attr_reader :env
# The backing logger which actually handles the IO. This logger
# should be a subclass of the standard library Logger, in general.
# IMPORTANT: This logger must be thread-safe.
attr_reader :logger
class << self
# Returns a singleton logger. If one has not yet be
# instantiated, then the given environment will be used to
# create a new logger.
def singleton_logger(env=nil)
return PlainLogger.new(nil) if !env.loaded?
@@singleton_logger ||= begin
file = env.log_path.join("#{Time.now.to_i}.log")
PlainLogger.new(file)
end
end
# Resets the singleton logger (only used for testing).
def reset_singleton_logger!
@@singleton_logger = nil
end
end
def initialize(resource, env)
@resource = resource
@env = env
@logger = self.class.singleton_logger(env)
end
[:debug, :info, :error, :fatal].each do |method|
define_method(method) do |message|
@@writer_lock.synchronize do
logger.send(method, "[#{resource}] #{message}")
end
end
end
end
end
end
Version data entries
42 entries across 42 versions & 4 rubygems