Source code for apache_beam.runners.direct.clock

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"""Clock implementations for real time processing and testing.

For internal use only. No backwards compatibility guarantees.
"""
# pytype: skip-file

import time

from apache_beam.utils.timestamp import Timestamp


[docs]class Clock(object):
[docs] def time(self): """Returns the number of seconds since epoch.""" raise NotImplementedError()
[docs] def advance_time(self, advance_by): """Advances the clock by a number of seconds.""" raise NotImplementedError()
[docs]class RealClock(object):
[docs] def time(self): return time.time()
[docs]class TestClock(object): """Clock used for Testing""" def __init__(self, current_time=None): self._current_time = current_time if current_time else Timestamp()
[docs] def time(self): return float(self._current_time)
[docs] def advance_time(self, advance_by): self._current_time += advance_by