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100 lines
3.0 KiB
100 lines
3.0 KiB
import ast
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from celery import signals
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from django.db import transaction
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from django.core.cache import cache
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from django.dispatch import receiver
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from django.db.utils import ProgrammingError
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from django.utils import translation, timezone
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from django.utils.translation import gettext as _
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from common.signals import django_ready
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from common.db.utils import close_old_connections, get_logger
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from .celery import app
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from .models import CeleryTaskExecution, CeleryTask
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logger = get_logger(__name__)
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TASK_LANG_CACHE_KEY = 'TASK_LANG_{}'
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TASK_LANG_CACHE_TTL = 1800
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@receiver(django_ready)
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def sync_registered_tasks(*args, **kwargs):
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with transaction.atomic():
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try:
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db_tasks = CeleryTask.objects.all()
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celery_task_names = [key for key in app.tasks]
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db_task_names = db_tasks.values_list('name', flat=True)
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db_tasks.exclude(name__in=celery_task_names).delete()
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not_in_db_tasks = set(celery_task_names) - set(db_task_names)
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tasks_to_create = [CeleryTask(name=name) for name in not_in_db_tasks]
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CeleryTask.objects.bulk_create(tasks_to_create)
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except ProgrammingError:
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pass
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@signals.before_task_publish.connect
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def before_task_publish(headers=None, **kwargs):
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task_id = headers.get('id')
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current_lang = translation.get_language()
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key = TASK_LANG_CACHE_KEY.format(task_id)
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cache.set(key, current_lang, 1800)
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@signals.task_prerun.connect
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def on_celery_task_pre_run(task_id='', **kwargs):
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# 更新状态
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CeleryTaskExecution.objects.filter(id=task_id) \
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.update(state='RUNNING', date_start=timezone.now())
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# 关闭之前的数据库连接
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close_old_connections()
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# 保存 Lang context
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key = TASK_LANG_CACHE_KEY.format(task_id)
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task_lang = cache.get(key)
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if task_lang:
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translation.activate(task_lang)
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@signals.task_postrun.connect
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def on_celery_task_post_run(task_id='', state='', **kwargs):
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close_old_connections()
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print(_("Task") + ": {} {}".format(task_id, state))
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CeleryTaskExecution.objects.filter(id=task_id).update(
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state=state, date_finished=timezone.now(), is_finished=True
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)
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@signals.after_task_publish.connect
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def task_sent_handler(headers=None, body=None, **kwargs):
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info = headers if 'task' in headers else body
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task = info.get('task')
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i = info.get('id')
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if not i or not task:
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logger.error("Not found task id or name: {}".format(info))
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return
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args = info.get('argsrepr', '()')
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kwargs = info.get('kwargsrepr', '{}')
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try:
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args = list(ast.literal_eval(args))
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kwargs = ast.literal_eval(kwargs)
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except (ValueError, SyntaxError):
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args = []
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kwargs = {}
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data = {
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'id': i,
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'name': task,
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'state': 'PENDING',
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'is_finished': False,
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'args': args,
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'kwargs': kwargs
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}
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CeleryTaskExecution.objects.create(**data)
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CeleryTask.objects.filter(name=task).update(last_published_time=timezone.now())
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