def pause_workflow(self, wf_ex_id):
with db_api.transaction():
wf_ex = wf_handler.lock_workflow_execution(wf_ex_id)
wf_handler.pause_workflow(wf_ex)
return wf_ex.get_clone()
def pause_workflow(self, wf_ex_id):
with db_api.transaction():
wf_ex = db_api.get_workflow_execution(wf_ex_id)
wf_handler.pause_workflow(wf_ex)
return wf_ex.get_clone()
def _on_action_update(action_ex):
"""Handles action update event.
:param action_ex: Action execution.
"""
task_ex = action_ex.task_execution
if not task_ex:
return
task_spec = spec_parser.get_task_spec(task_ex.spec)
wf_ex = task_ex.workflow_execution
task = _create_task(
wf_ex,
spec_parser.get_workflow_spec_by_execution_id(wf_ex.id),
task_spec,
task_ex.in_context,
task_ex
)
try:
task.on_action_update(action_ex)
if states.is_paused(action_ex.state):
wf_handler.pause_workflow(wf_ex)
if states.is_running(action_ex.state):
# If any subworkflow of the parent workflow is paused,
# then keep the parent workflow execution paused.
for task_ex in wf_ex.task_executions:
if states.is_paused(task_ex.state):
return
# Otherwise if no other subworkflow is paused,
# then resume the parent workflow execution.
wf_handler.resume_workflow(wf_ex)
except exc.MistralException as e:
wf_ex = task_ex.workflow_execution
msg = ("Failed to handle action update [error=%s, wf=%s, task=%s,"
" action=%s]:\n%s" %
(e, wf_ex.name, task_ex.name, action_ex.name, tb.format_exc()))
LOG.error(msg)
task.set_state(states.ERROR, msg)
wf_handler.force_fail_workflow(wf_ex, msg)
return
def before_task_start(self, task_ex, task_spec):
super(PauseBeforePolicy, self).before_task_start(task_ex, task_spec)
if not self.expr:
return
wf_trace.info(
task_ex, "Workflow paused before task '%s' [%s -> %s]" %
(task_ex.name, task_ex.workflow_execution.state, states.PAUSED))
task_ex.state = states.IDLE
wf_handler.pause_workflow(task_ex.workflow_execution)
def _on_action_update(action_ex):
"""Handles action update event.
:param action_ex: Action execution.
"""
task_ex = action_ex.task_execution
if not task_ex:
return
task_spec = spec_parser.get_task_spec(task_ex.spec)
wf_ex = task_ex.workflow_execution
task = _create_task(
wf_ex,
spec_parser.get_workflow_spec_by_execution_id(wf_ex.id),
task_spec,
task_ex.in_context,
task_ex
)
try:
task.on_action_update(action_ex)
if states.is_paused(action_ex.state):
wf_handler.pause_workflow(wf_ex)
if states.is_running(action_ex.state):
# If any subworkflow of the parent workflow is paused,
# then keep the parent workflow execution paused.
for task_ex in wf_ex.task_executions:
if states.is_paused(task_ex.state):
return
# Otherwise if no other subworkflow is paused,
# then resume the parent workflow execution.
wf_handler.resume_workflow(wf_ex)
except exc.MistralException as e:
wf_ex = task_ex.workflow_execution
msg = ("Failed to handle action update [error=%s, wf=%s, task=%s,"
" action=%s]:\n%s" %
(e, wf_ex.name, task_ex.name, action_ex.name, tb.format_exc()))
force_fail_task(task_ex, msg, task=task)
return
_check_affected_tasks(task)
def before_task_start(self, task):
super(PauseBeforePolicy, self).before_task_start(task)
if not self.expr:
return
wf_trace.info(
task.task_ex, "Workflow paused before task '%s' [%s -> %s]" %
(task.get_name(), task.wf_ex.state, states.PAUSED))
task.set_state(states.IDLE, "Set by 'pause-before' policy")
wf_handler.pause_workflow(task.wf_ex)
def before_task_start(self, task_ex, task_spec):
super(PauseBeforePolicy, self).before_task_start(task_ex, task_spec)
if not self.expr:
return
wf_trace.info(
task_ex,
"Workflow paused before task '%s' [%s -> %s]" %
(task_ex.name, task_ex.workflow_execution.state, states.PAUSED)
)
task_ex.state = states.IDLE
wf_handler.pause_workflow(task_ex.workflow_execution)
