def next(or_upcoming=False):
q = Session.query(Task).filter_by(state='pending')
if not or_upcoming:
q = q.filter(Task.time_wait_until<=datetime.now())
q = q.order_by(Task.time_wait_until.asc())
return q.first()
def delay_resource_group(resource_group, delta=None):
# Make sure all tasks of given resource_group are scheduled for no sooner than now+delta.
affected_tasks = Session.query(Task).filter(and_(Task.time_wait_until > (datetime.now() - delta), Task.state<'completed', Task.resource_group==resource_group))
for t in affected_tasks:
t.time_wait_until += delta