<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def progress(self):
 """\ Report progress to the Java side. This needs to flush the uplink stream, but too many flushes can disrupt performance, so we actually talk to upstream once per second. """

        now = time()
        if now - self.last_progress_t > 1:
            self.last_progress_t = now
            if self.status:
                self.uplink.status(self.status)
                self.status = None
            self.__spill_counters()
            self.uplink.progress(self.progress_value)
            self.uplink.flush()