#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""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