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- from abc import abstractmethod
- import concurrent.futures
- from apscheduler.executors.base import BaseExecutor, run_job
- try:
- from concurrent.futures.process import BrokenProcessPool
- except ImportError:
- BrokenProcessPool = None
- class BasePoolExecutor(BaseExecutor):
- @abstractmethod
- def __init__(self, pool):
- super(BasePoolExecutor, self).__init__()
- self._pool = pool
- def _do_submit_job(self, job, run_times):
- def callback(f):
- exc, tb = (f.exception_info() if hasattr(f, 'exception_info') else
- (f.exception(), getattr(f.exception(), '__traceback__', None)))
- if exc:
- self._run_job_error(job.id, exc, tb)
- else:
- self._run_job_success(job.id, f.result())
- try:
- f = self._pool.submit(run_job, job, job._jobstore_alias, run_times, self._logger.name)
- except BrokenProcessPool:
- self._logger.warning('Process pool is broken; replacing pool with a fresh instance')
- self._pool = self._pool.__class__(self._pool._max_workers)
- f = self._pool.submit(run_job, job, job._jobstore_alias, run_times, self._logger.name)
- f.add_done_callback(callback)
- def shutdown(self, wait=True):
- self._pool.shutdown(wait)
- class ThreadPoolExecutor(BasePoolExecutor):
- """
- An executor that runs jobs in a concurrent.futures thread pool.
- Plugin alias: ``threadpool``
- :param max_workers: the maximum number of spawned threads.
- :param pool_kwargs: dict of keyword arguments to pass to the underlying
- ThreadPoolExecutor constructor
- """
- def __init__(self, max_workers=10, pool_kwargs=None):
- pool_kwargs = pool_kwargs or {}
- pool = concurrent.futures.ThreadPoolExecutor(int(max_workers), **pool_kwargs)
- super(ThreadPoolExecutor, self).__init__(pool)
- class ProcessPoolExecutor(BasePoolExecutor):
- """
- An executor that runs jobs in a concurrent.futures process pool.
- Plugin alias: ``processpool``
- :param max_workers: the maximum number of spawned processes.
- :param pool_kwargs: dict of keyword arguments to pass to the underlying
- ProcessPoolExecutor constructor
- """
- def __init__(self, max_workers=10, pool_kwargs=None):
- pool_kwargs = pool_kwargs or {}
- pool = concurrent.futures.ProcessPoolExecutor(int(max_workers), **pool_kwargs)
- super(ProcessPoolExecutor, self).__init__(pool)
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