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racecond.py
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executable file
·29 lines (23 loc) · 884 Bytes
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#!/usr/bin/env python3
import concurrent.futures
import logging
import time
class FakeDatabase:
def __init__(self):
self.value = 0
def update(self, name):
logging.info("Thread %s: starting update", name)
local_copy = self.value
local_copy += 1
time.sleep(0.1)
self.value = local_copy
logging.info("Thread %s: finishing update", name)
if __name__ == "__main__":
format = "%(asctime)s: %(message)s"
logging.basicConfig(format=format, level=logging.INFO, datefmt="%H:%M:%S")
database = FakeDatabase()
logging.info("Testing update. Starting value is %d.", database.value)
with concurrent.futures.ThreadPoolExecutor(max_workers=2) as executor:
for index in range(2):
executor.submit(database.update, index)
logging.info("Testing update. Ending value is %d.", database.value)