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| from concurrent import futures | |
| from random import randint | |
| import time, os, math, logging, logging.handlers, pprint | |
| import multiprocessing | |
| formatter = logging.Formatter('[%(asctime)s] - %(name)s - %(levelname)s - %(message)s') | |
| cons_log = logging.StreamHandler() | |
| cons_log.setFormatter(formatter) | |
| handler = logging.handlers.WatchedFileHandler('status.log') | |
| handler.setFormatter(formatter) | |
| logger = logging.getLogger() | |
| logger.setLevel("DEBUG") | |
| logger.addHandler(handler) | |
| logger.addHandler(cons_log) | |
| manager = multiprocessing.Manager() | |
| shared_ids = manager.list() | |
| share_dict = manager.dict() | |
| def generate_records(): | |
| for id in range(1,11): | |
| share_dict.update({id:{'title':f'Record #{id}', 'id':id, 'status':'new', 'source':id, 'result':0}}) | |
| def step_one(id, share_rec): | |
| cur_rec = share_rec[id] | |
| cur_rec['status'] = 'step one' | |
| share_rec[id] = cur_rec | |
| logger.info(f"Step one - {share_rec[id]}") | |
| time.sleep(1) | |
| step_two(id, share_rec) | |
| def step_two(id, share_rec): | |
| cur_rec = share_rec[id] | |
| cur_rec['status'] = 'step two' | |
| share_rec[id] = cur_rec | |
| logger.info(f"Step two - {share_rec[id]}") | |
| time.sleep(1) | |
| step_three(id, share_rec) | |
| def step_three(id, share_rec): | |
| cur_rec = share_rec[id] | |
| cur_rec['result'] = math.sqrt(cur_rec['source']) | |
| cur_rec['status'] = 'step three DONE' | |
| # | |
| if id == 10: | |
| time.sleep(15) | |
| share_rec[id] = cur_rec | |
| logger.info(f"Step three - {share_rec[id]}") | |
| time.sleep(2) | |
| def fetch_new_records(): | |
| new_rec = [] | |
| for id, rec in share_dict.items(): | |
| if rec['status'] == 'new': | |
| new_rec.append(id) | |
| return new_rec[:3] | |
| def multi_main_loop(): | |
| counter = 0 | |
| while counter < 20: | |
| new_rec = fetch_new_records() | |
| if new_rec: | |
| with futures.ProcessPoolExecutor(max_workers=5) as pool: | |
| running = [] | |
| for id in new_rec: | |
| running.append(pool.submit(step_one, id, share_dict)) | |
| done, not_done = futures.wait(running, timeout=5) | |
| for future in done: | |
| exception = future.exception() | |
| if exception: | |
| print(exception) | |
| else: | |
| data = future.result() | |
| #print('Successfully') | |
| for future in not_done: | |
| print('future canceling') | |
| future.cancel() | |
| logger.info('sleeping') | |
| time.sleep(1) | |
| counter+=1 | |
| if __name__ == '__main__': | |
| generate_records() | |
| multi_main_loop() | |
| [print(f"{k}:{v}") for k,v in share_dict.items()] |
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