def check_and_complete(self):
"""Completes the workflow if it needs to be completed.
The method simply checks if there are any tasks that are not
in a terminal state. If there aren't any then it performs all
necessary logic to finalize the workflow (calculate output etc.).
:return: Number of incomplete tasks.
"""
if states.is_paused_or_completed(self.wf_ex.state):
return 0
# Workflow is not completed if there are any incomplete task
# executions.
incomplete_tasks_count = db_api.get_incomplete_task_executions_count(
workflow_execution_id=self.wf_ex.id,
)
if incomplete_tasks_count > 0:
return incomplete_tasks_count
LOG.debug("Workflow completed [id=%s]", self.wf_ex.id)
# NOTE(rakhmerov): Once we know that the workflow has completed,
# we need to expire all the objects in the DB session to make sure
# to read the most relevant data from the DB (that's already been
# committed in parallel transactions). Otherwise, some data like
# workflow context may be stale and decisions made upon it will be
# wrong.
db_api.expire_all()
wf_ctrl = wf_base.get_controller(self.wf_ex, self.wf_spec)
if wf_ctrl.any_cancels():
msg = _build_cancel_info_message(wf_ctrl, self.wf_ex)
self._cancel_workflow(msg)
elif wf_ctrl.all_errors_handled():
ctx = wf_ctrl.evaluate_workflow_final_context()
self._succeed_workflow(ctx)
else:
msg = _build_fail_info_message(wf_ctrl, self.wf_ex)
final_context = wf_ctrl.evaluate_workflow_final_context()
self._fail_workflow(final_context, msg)
return 0
def check_and_complete(self):
"""Completes the workflow if it needs to be completed.
The method simply checks if there are any tasks that are not
in a terminal state. If there aren't any then it performs all
necessary logic to finalize the workflow (calculate output etc.).
:return: Number of incomplete tasks.
"""
if states.is_paused_or_completed(self.wf_ex.state):
return 0
# Workflow is not completed if there are any incomplete task
# executions.
incomplete_tasks_count = db_api.get_incomplete_task_executions_count(
workflow_execution_id=self.wf_ex.id,
)
if incomplete_tasks_count > 0:
return incomplete_tasks_count
LOG.debug("Workflow completed [id=%s]", self.wf_ex.id)
# NOTE(rakhmerov): Once we know that the workflow has completed,
# we need to expire all the objects in the DB session to make sure
# to read the most relevant data from the DB (that's already been
# committed in parallel transactions). Otherwise, some data like
# workflow context may be stale and decisions made upon it will be
# wrong.
db_api.expire_all()
wf_ctrl = wf_base.get_controller(self.wf_ex, self.wf_spec)
if wf_ctrl.any_cancels():
msg = _build_cancel_info_message(wf_ctrl, self.wf_ex)
self._cancel_workflow(msg)
elif wf_ctrl.all_errors_handled():
ctx = wf_ctrl.evaluate_workflow_final_context()
self._succeed_workflow(ctx)
else:
msg = _build_fail_info_message(wf_ctrl, self.wf_ex)
final_context = wf_ctrl.evaluate_workflow_final_context()
self._fail_workflow(final_context, msg)
return 0