def request_pause(ac_ex_db):
wf_ac_ex_id = str(ac_ex_db.id)
LOG.info('[%s] Processing pause request for workflow.', wf_ac_ex_id)
wf_ex_dbs = wf_db_access.WorkflowExecution.query(
action_execution=str(ac_ex_db.id))
if not wf_ex_dbs:
raise wf_exc.WorkflowExecutionNotFoundException(str(ac_ex_db.id))
if len(wf_ex_dbs) > 1:
raise wf_exc.AmbiguousWorkflowExecutionException(str(ac_ex_db.id))
wf_ex_db = wf_ex_dbs[0]
if wf_ex_db.status in states.COMPLETED_STATES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
conductor = deserialize_conductor(wf_ex_db)
if conductor.get_workflow_state() in states.COMPLETED_STATES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
conductor.request_workflow_state(states.PAUSED)
# Write the updated workflow state and task flow to the database.
wf_ex_db.status = conductor.get_workflow_state()
wf_ex_db.flow = conductor.flow.serialize()
wf_ex_db = wf_db_access.WorkflowExecution.update(wf_ex_db, publish=False)
LOG.info('[%s] Completed processing pause request for workflow.',
wf_ac_ex_id)
return wf_ex_db
def request_resume(ac_ex_db):
wf_ac_ex_id = str(ac_ex_db.id)
LOG.info('[%s] Processing resume request for workflow.', wf_ac_ex_id)
wf_ex_dbs = wf_db_access.WorkflowExecution.query(
action_execution=str(ac_ex_db.id))
if not wf_ex_dbs:
raise wf_exc.WorkflowExecutionNotFoundException(str(ac_ex_db.id))
if len(wf_ex_dbs) > 1:
raise wf_exc.AmbiguousWorkflowExecutionException(str(ac_ex_db.id))
wf_ex_db = wf_ex_dbs[0]
if wf_ex_db.status in statuses.COMPLETED_STATUSES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
if wf_ex_db.status in statuses.RUNNING_STATUSES:
msg = '[%s] Workflow execution "%s" is not resumed because it is already active.'
LOG.info(msg, wf_ac_ex_id, str(wf_ex_db.id))
return
conductor = deserialize_conductor(wf_ex_db)
if conductor.get_workflow_status() in statuses.COMPLETED_STATUSES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
if conductor.get_workflow_status() in statuses.RUNNING_STATUSES:
msg = '[%s] Workflow execution "%s" is not resumed because it is already active.'
LOG.info(msg, wf_ac_ex_id, str(wf_ex_db.id))
return
conductor.request_workflow_status(statuses.RESUMING)
# Write the updated workflow status and task flow to the database.
wf_ex_db.status = conductor.get_workflow_status()
wf_ex_db.state = conductor.workflow_state.serialize()
wf_db_access.WorkflowExecution.update(wf_ex_db, publish=False)
wf_ex_db = wf_db_access.WorkflowExecution.get_by_id(str(wf_ex_db.id))
# Publish status change.
wf_db_access.WorkflowExecution.publish_status(wf_ex_db)
LOG.info('[%s] Completed processing resume request for workflow.',
wf_ac_ex_id)
return wf_ex_db
def request_cancellation(ac_ex_db):
wf_ac_ex_id = str(ac_ex_db.id)
LOG.info('[%s] Processing cancelation request for workflow.', wf_ac_ex_id)
wf_ex_dbs = wf_db_access.WorkflowExecution.query(
action_execution=str(ac_ex_db.id))
if not wf_ex_dbs:
raise wf_exc.WorkflowExecutionNotFoundException(str(ac_ex_db.id))
if len(wf_ex_dbs) > 1:
raise wf_exc.AmbiguousWorkflowExecutionException(str(ac_ex_db.id))
wf_ex_db = wf_ex_dbs[0]
if wf_ex_db.status in statuses.COMPLETED_STATUSES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
conductor = deserialize_conductor(wf_ex_db)
if conductor.get_workflow_status() in statuses.COMPLETED_STATUSES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
conductor.request_workflow_status(statuses.CANCELED)
# Write the updated workflow status and task flow to the database.
wf_ex_db.status = conductor.get_workflow_status()
wf_ex_db.state = conductor.workflow_state.serialize()
wf_ex_db = wf_db_access.WorkflowExecution.update(wf_ex_db, publish=False)
# Cascade the cancellation up to the root of the workflow.
root_ac_ex_db = ac_svc.get_root_execution(ac_ex_db)
if root_ac_ex_db != ac_ex_db and root_ac_ex_db.status not in ac_const.LIVEACTION_CANCEL_STATES:
LOG.info('[%s] Cascading cancelation request to parent workflow.',
wf_ac_ex_id)
root_lv_ac_db = lv_db_access.LiveAction.get(
id=root_ac_ex_db.liveaction['id'])
ac_svc.request_cancellation(root_lv_ac_db, None)
LOG.debug('[%s] %s', wf_ac_ex_id, conductor.serialize())
LOG.info('[%s] Completed processing cancelation request for workflow.',
wf_ac_ex_id)
return wf_ex_db
def request_resume(ac_ex_db):
wf_ex_dbs = wf_db_access.WorkflowExecution.query(
action_execution=str(ac_ex_db.id))
if not wf_ex_dbs:
raise wf_exc.WorkflowExecutionNotFoundException(str(ac_ex_db.id))
if len(wf_ex_dbs) > 1:
raise wf_exc.AmbiguousWorkflowExecutionException(str(ac_ex_db.id))
wf_ex_db = wf_ex_dbs[0]
if wf_ex_db.status in states.COMPLETED_STATES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
if wf_ex_db.status in states.RUNNING_STATES:
raise wf_exc.WorkflowExecutionIsRunningException(str(wf_ex_db.id))
conductor = deserialize_conductor(wf_ex_db)
if conductor.get_workflow_state() in states.COMPLETED_STATES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
if conductor.get_workflow_state() in states.RUNNING_STATES:
raise wf_exc.WorkflowExecutionIsRunningException(str(wf_ex_db.id))
conductor.set_workflow_state(states.RESUMING)
# Write the updated workflow state and task flow to the database.
wf_ex_db.status = conductor.get_workflow_state()
wf_ex_db.flow = conductor.flow.serialize()
wf_ex_db = wf_db_access.WorkflowExecution.update(wf_ex_db, publish=False)
# Publish state change.
wf_db_access.WorkflowExecution.publish_status(wf_ex_db)
return wf_ex_db
def request_cancellation(ac_ex_db):
wf_ex_dbs = wf_db_access.WorkflowExecution.query(
action_execution=str(ac_ex_db.id))
if not wf_ex_dbs:
raise wf_exc.WorkflowExecutionNotFoundException(str(ac_ex_db.id))
if len(wf_ex_dbs) > 1:
raise wf_exc.AmbiguousWorkflowExecutionException(str(ac_ex_db.id))
wf_ex_db = wf_ex_dbs[0]
if wf_ex_db.status in states.COMPLETED_STATES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
conductor = deserialize_conductor(wf_ex_db)
if conductor.get_workflow_state() in states.COMPLETED_STATES:
raise wf_exc.WorkflowExecutionIsCompletedException(str(wf_ex_db.id))
conductor.set_workflow_state(states.CANCELED)
# Write the updated workflow state and task flow to the database.
wf_ex_db.status = conductor.get_workflow_state()
wf_ex_db.flow = conductor.flow.serialize()
wf_ex_db = wf_db_access.WorkflowExecution.update(wf_ex_db, publish=False)
# Cascade the cancellation up to the root of the workflow.
root_ac_ex_db = ac_svc.get_root_execution(ac_ex_db)
if root_ac_ex_db != ac_ex_db and root_ac_ex_db.status not in ac_const.LIVEACTION_CANCEL_STATES:
root_lv_ac_db = lv_db_access.LiveAction.get(
id=root_ac_ex_db.liveaction['id'])
ac_svc.request_cancellation(root_lv_ac_db, None)
return wf_ex_db
