class WhiteBoardEntry:
    def __init__(self, key, value, time):
        self.__key = key
        self.__value = value
        self.__time = int(time)

    @property
    def key(self):
        return self.__key

    @property
    def value(self):
        return self.__value

    @property
    def time(self):
        return self.__time

    def __str__(self):
        from datetime import datetime
        return 'WhiteBoardEntry: {0} -> {1} (@time: {2})'.format(self.key, self.value, datetime.fromtimestamp(self.time))