    from Common import *
    from Message import Message

    class Response(Message):
        """
        Response is a type of Message that offers the following:

            * @@ 20000-04-17 ce
            *

        Response is an abstract class; developers typically use HTTPResponse.

        FUTURE
            * Consider implementing the buffer/flush logic here including buffer size.
            * Also, consider then having a method that doesn't allow committment until the end.
        """

        ## Init ##

        def __init__(self, trans, strmOut):
            Message.__init__(self)
            self._strmOut = strmOut
            self._transaction = trans

        ## End time ##

        def endTime(self):
            return self._endTime

        def recordEndTime(self):
            """ Stores the current time as the end time of the response. This should be invoked at the end of deliver(). It may also be invoked by the application for those responses that never deliver due to an error. """
            self._endTime = time.time()

        ## Output ##

        def write(self, string):
            raise AbstractError, self.__class__

        def isCommitted(self):
            raise AbstractError, self.__class__

        def deliver(self):
            raise AbstractError, self.__class__

        def reset(self):
            raise AbstractError, self.__class__

        def streamOut(self):
            return self._strmOut

        ## Cleanup ##

        def clearTransaction(self):
            del self._transaction

        ## Exception reporting ##

        exceptionReportAttrNames = Message.exceptionReportAttrNames + ['endTime']