mirror of
https://github.com/GSA/notifications-api.git
synced 2026-01-25 12:01:38 -05:00
369a9f7521
This reduces the complexity of the original functions, which will go up a bit in the next commit.
108 lines
3.7 KiB
Python
108 lines
3.7 KiB
Python
import time
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from celery import Celery, Task
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from celery.signals import worker_process_shutdown
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from flask import g, request
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from flask.ctx import has_app_context, has_request_context
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@worker_process_shutdown.connect
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def log_on_worker_shutdown(sender, signal, pid, exitcode, **kwargs):
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# imported here to avoid circular imports
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from app import notify_celery
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# if the worker has already restarted at least once, then we no longer have app context and current_app won't work
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# to create a new one. Instead we have to create a new app context from the original flask app and use that instead.
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with notify_celery._app.app_context():
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# if the worker has restarted
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notify_celery._app.logger.info('worker shutdown: PID: {} Exitcode: {}'.format(pid, exitcode))
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def make_task(app):
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class NotifyTask(Task):
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abstract = True
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start = None
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typing = False
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@property
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def queue_name(self):
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delivery_info = self.request.delivery_info or {}
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return delivery_info.get('routing_key', 'none')
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@property
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def request_id(self):
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# Note that each header is a direct attribute of the
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# task context (aka "request").
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return self.request.get('notify_request_id')
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def on_success(self, retval, task_id, args, kwargs):
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elapsed_time = time.monotonic() - self.start
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app.logger.info(
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"Celery task {task_name} (queue: {queue_name}) took {time}".format(
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task_name=self.name,
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queue_name=self.queue_name,
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time="{0:.4f}".format(elapsed_time)
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)
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)
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app.statsd_client.timing(
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"celery.{queue_name}.{task_name}.success".format(
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task_name=self.name,
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queue_name=self.queue_name
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), elapsed_time
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)
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def on_failure(self, exc, task_id, args, kwargs, einfo):
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app.logger.exception(
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"Celery task {task_name} (queue: {queue_name}) failed".format(
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task_name=self.name,
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queue_name=self.queue_name,
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)
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)
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app.statsd_client.incr(
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"celery.{queue_name}.{task_name}.failure".format(
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task_name=self.name,
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queue_name=self.queue_name
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)
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)
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super().on_failure(exc, task_id, args, kwargs, einfo)
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def __call__(self, *args, **kwargs):
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# ensure task has flask context to access config, logger, etc
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with app.app_context():
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self.start = time.monotonic()
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# TEMPORARY: remove old piggyback values from kwargs
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kwargs.pop('request_id', None)
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# Add 'request_id' to 'g' so that it gets logged. Note
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g.request_id = self.request_id
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return super().__call__(*args, **kwargs)
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return NotifyTask
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class NotifyCelery(Celery):
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def init_app(self, app):
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super().__init__(
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app.import_name,
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broker=app.config['CELERY']['broker_url'],
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task_cls=make_task(app),
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)
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self.conf.update(app.config['CELERY'])
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self._app = app
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def send_task(self, name, args=None, kwargs=None, **other_kwargs):
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other_kwargs['headers'] = other_kwargs.get('headers') or {}
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if has_request_context() and hasattr(request, 'request_id'):
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other_kwargs['headers']['notify_request_id'] = request.request_id
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elif has_app_context() and 'request_id' in g:
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other_kwargs['headers']['notify_request_id'] = g.request_id
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return super().send_task(name, args, kwargs, **other_kwargs)
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