module Protobuf::Logging

def self.initialize_logger(log_target=$stdout, log_level=::Logger::INFO)
  @counter ||= 0
  @counter = @counter + 1
  @logger = Logger.new(log_target)
  @logger.level = log_level
  @logger
end

def self.logger
  defined?(@logger) ? @logger : initialize_logger
end

def self.logger=(new_logger)
  @logger = new_logger
end

def log_exception(ex)
  logger.error { ex.message }
  logger.error { ex.backtrace[0..5].join("\n") }
  logger.debug { ex.backtrace.join("\n") }
end

def log_signature
  @_log_signature ||= "[#{self.class == Class ? self.name : self.class.name}]"
end

def logger
  ::Protobuf::Logging.logger
end

def sign_message(message)
  "#{log_signature} #{message}"
end