def process_workflow_event(cls, workflow_state, task_state, wf_ex_event):
# Check if event is valid.
if wf_ex_event.name not in events.WORKFLOW_EXECUTION_EVENTS:
raise exc.InvalidEvent(wf_ex_event.name)
# Append additional task context to the event.
event_name = cls.add_context_to_workflow_event(workflow_state,
task_state['id'],
task_state['route'],
wf_ex_event)
# Identify current task status.
current_task_status = task_state.get('status', statuses.UNSET)
if current_task_status is None:
current_task_status = statuses.UNSET
if current_task_status not in statuses.ALL_STATUSES:
raise exc.InvalidStatus(current_task_status)
if current_task_status not in TASK_STATE_MACHINE_DATA:
raise exc.InvalidTaskStatusTransition(current_task_status,
event_name)
# If no transition is identified, then there is no status change.
if event_name not in TASK_STATE_MACHINE_DATA[current_task_status]:
return
new_task_status = TASK_STATE_MACHINE_DATA[current_task_status][
event_name]
# Assign new status to the task flow entry.
task_state['status'] = new_task_status
def process_workflow_event(cls, workflow_state, wf_ex_event):
# Append additional workflow context to the event.
event_name = cls.add_context_to_workflow_event(workflow_state,
wf_ex_event)
# Check if event is valid.
if event_name not in events.WORKFLOW_EXECUTION_EVENTS:
raise exc.InvalidEvent(event_name)
# Capture current workflow status.
current_workflow_status = workflow_state.status
new_workflow_status = current_workflow_status
# Check if the current workflow status can be transitioned.
if current_workflow_status not in WORKFLOW_STATE_MACHINE_DATA:
raise exc.InvalidWorkflowStatusTransition(current_workflow_status,
event_name)
# If the current workflow status can be transitioned and there is no match on the
# event, then there is not status transition.
if event_name not in WORKFLOW_STATE_MACHINE_DATA[
current_workflow_status]:
return
new_workflow_status = WORKFLOW_STATE_MACHINE_DATA[
current_workflow_status][event_name]
# Assign new workflow status if there is change.
if current_workflow_status != new_workflow_status:
workflow_state.status = new_workflow_status
def process_task_item_event(cls, workflow_state, task_state, ac_ex_event):
# Check if event is valid.
if ac_ex_event.name not in events.ACTION_EXECUTION_EVENTS + events.ENGINE_OPERATION_EVENTS:
raise exc.InvalidEvent(ac_ex_event.name)
# Append additional task context to the event.
event_name = cls.add_context_to_task_item_event(
workflow_state, task_state["id"], task_state["route"], ac_ex_event)
# Identify current task status.
current_task_status = task_state.get("status", statuses.UNSET)
if current_task_status is None:
current_task_status = statuses.UNSET
if current_task_status not in statuses.ALL_STATUSES:
raise exc.InvalidStatus(current_task_status)
if current_task_status not in TASK_STATE_MACHINE_DATA:
raise exc.InvalidTaskStatusTransition(current_task_status,
event_name)
# If no transition is identified, then there is no status change.
if event_name not in TASK_STATE_MACHINE_DATA[current_task_status]:
return
new_task_status = TASK_STATE_MACHINE_DATA[current_task_status][
event_name]
# Assign new status to the task flow entry.
task_state["status"] = new_task_status
def process_task_event(cls, workflow_state, tk_ex_event):
# Append additional workflow context to the event.
event_name = cls.add_context_to_task_event(workflow_state, tk_ex_event)
# Check if event is valid.
if event_name not in events.TASK_EXECUTION_EVENTS:
raise exc.InvalidEvent(event_name)
# Capture current workflow status.
current_workflow_status = workflow_state.status
new_workflow_status = current_workflow_status
# Check if the current workflow status can be transitioned.
if current_workflow_status not in WORKFLOW_STATE_MACHINE_DATA:
raise exc.InvalidWorkflowStatusTransition(current_workflow_status,
event_name)
# If the current workflow status can be transitioned and there is no match on the
# event, then there is not status transition.
if event_name not in WORKFLOW_STATE_MACHINE_DATA[
current_workflow_status]:
return
new_workflow_status = WORKFLOW_STATE_MACHINE_DATA[
current_workflow_status][event_name]
# Assign new workflow status if there is change.
if current_workflow_status != new_workflow_status:
workflow_state.status = new_workflow_status
# If the final workflow status here is completed, then ensure there is no unreachable
# barrier task(s). A barrier task is unreachable if the workflow is completed but then one
# or more criteria for the task is satisified. In this case, log the task and fail the
# workflow to notify that the execution is incomplete but unable to proceed.
if workflow_state.status in statuses.COMPLETED_STATUSES:
unreachable_barriers = workflow_state.get_unreachable_barriers()
# If there are unreachable barrier tasks, then change workflow status to failed
# and write an error log for each case.
if unreachable_barriers:
workflow_state.status = statuses.FAILED
for entry in unreachable_barriers:
e = exc.UnreachableJoinError(entry["id"], entry["route"])
workflow_state.conductor.log_error(e,
task_id=entry["id"],
route=entry["route"])
