Update the checkouts app to use Celery beat

mayan/apps/checkouts/__init__.py

@@ -1,12 +1,14 @@
 from __future__ import absolute_import
 
+from datetime import timedelta
+
 from django.utils.translation import ugettext_lazy as _
 
 from acls.api import class_permissions
 from documents.models import Document
+from mayan.celery import app
 from history.api import register_history_type
 from navigation.api import register_links, register_top_menu
-from scheduler.api import register_interval_job
 
 from .events import (HISTORY_DOCUMENT_CHECKED_OUT, HISTORY_DOCUMENT_CHECKED_IN,
     HISTORY_DOCUMENT_AUTO_CHECKED_IN, HISTORY_DOCUMENT_FORCEFUL_CHECK_IN)
@@ -17,6 +19,8 @@ from .permissions import (PERMISSION_DOCUMENT_CHECKOUT,
     PERMISSION_DOCUMENT_RESTRICTIONS_OVERRIDE)
 from .tasks import task_check_expired_check_outs
 
+CHECK_EXPIRED_CHECK_OUTS_INTERVAL = 60  # Lowest check out expiration allowed
+
 
 def initialize_document_checkout_extra_methods():
     Document.add_to_class('is_checked_out', lambda document: DocumentCheckout.objects.is_document_checked_out(document))
@@ -36,10 +40,15 @@ class_permissions(Document, [
     PERMISSION_DOCUMENT_RESTRICTIONS_OVERRIDE
 ])
 
-CHECK_EXPIRED_CHECK_OUTS_INTERVAL = 60  # Lowest check out expiration allowed
-register_interval_job('task_check_expired_check_outs', _(u'Check expired check out documents and checks them in.'), task_check_expired_check_outs, seconds=CHECK_EXPIRED_CHECK_OUTS_INTERVAL)
 initialize_document_checkout_extra_methods()
 register_history_type(HISTORY_DOCUMENT_CHECKED_OUT)
 register_history_type(HISTORY_DOCUMENT_CHECKED_IN)
 register_history_type(HISTORY_DOCUMENT_AUTO_CHECKED_IN)
 register_history_type(HISTORY_DOCUMENT_FORCEFUL_CHECK_IN)
+
+app.conf.CELERYBEAT_SCHEDULE.update({
+    'check_expired_check_outs': {
+        'task': 'checkouts.tasks.task_check_expired_check_outs',
+        'schedule': timedelta(seconds=CHECK_EXPIRED_CHECK_OUTS_INTERVAL),
+    },
+})

mayan/apps/checkouts/tasks.py

@@ -3,6 +3,7 @@ from __future__ import absolute_import
 import logging
 
 from lock_manager import Lock, LockError
+from mayan.celery import app
 
 from .models import DocumentCheckout
 
@@ -10,6 +11,7 @@ LOCK_EXPIRE = 50
 logger = logging.getLogger(__name__)
 
 
+@app.task
 def task_check_expired_check_outs():
     logger.debug('executing...')
     lock_id = u'task_expired_check_outs'