from __future__ import absolute_import import sys from concurrent.futures import ThreadPoolExecutor from tornado.gen import convert_yielded from apscheduler.executors.base import BaseExecutor, run_job try: from inspect import iscoroutinefunction from apscheduler.executors.base_py3 import run_coroutine_job except ImportError: def iscoroutinefunction(func): return False class TornadoExecutor(BaseExecutor): """ Runs jobs either in a thread pool or directly on the I/O loop. If the job function is a native coroutine function, it is scheduled to be run directly in the I/O loop as soon as possible. All other functions are run in a thread pool. Plugin alias: ``tornado`` :param int max_workers: maximum number of worker threads in the thread pool """ def __init__(self, max_workers=10): super(TornadoExecutor, self).__init__() self.executor = ThreadPoolExecutor(max_workers) def start(self, scheduler, alias): super(TornadoExecutor, self).start(scheduler, alias) self._ioloop = scheduler._ioloop def _do_submit_job(self, job, run_times): def callback(f): try: events = f.result() except: self._run_job_error(job.id, *sys.exc_info()[1:]) else: self._run_job_success(job.id, events) if iscoroutinefunction(job.func): f = run_coroutine_job(job, job._jobstore_alias, run_times, self._logger.name) else: f = self.executor.submit(run_job, job, job._jobstore_alias, run_times, self._logger.name) f = convert_yielded(f) f.add_done_callback(callback)