def transit(self,
id,
to_state,
is_pipeline=False,
appoint=False,
start=False,
name='',
version=None,
unchanged_pass=False):
"""
尝试改变某个节点的状态
:param id: 节点 ID
:param to_state: 目标状态
:param is_pipeline: 该节点是否是 pipeline
:param appoint: 该动作是否由用户发起（非引擎内部操作）
:param start: 是否刷新其开始时间
:param name: 节点名称
:param version: 节点版本
:param unchanged_pass: 当 to_state 与当前节点状态相同时则视为操作成功
:return:
"""
defaults = {'name': name, 'state': to_state, 'version': uniqid()}
if start:
defaults['started_time'] = timezone.now()
status, created = self.get_or_create(id=id, defaults=defaults)
# reservation or first creation
if created:
return ActionResult(result=True, message='success', extra=status)
with transaction.atomic():
kwargs = {'id': id}
if version:
kwargs['version'] = version
try:
status = self.select_for_update().get(**kwargs)
except Status.DoesNotExist:
return ActionResult(
result=False,
message='node not exists or not be executed yet')
if unchanged_pass and status.state == to_state:
return ActionResult(result=True,
message='success',
extra=status)
if states.can_transit(from_state=status.state,
to_state=to_state,
is_pipeline=is_pipeline,
appoint=appoint):
# 在冻结状态下不能改变 pipeline 的状态
if is_pipeline:
subprocess_rel = SubProcessRelationship.objects.filter(
subprocess_id=id)
if subprocess_rel:
process = PipelineProcess.objects.get(
id=subprocess_rel[0].process_id)
if process.is_frozen:
return ActionResult(
result=False,
message=
'engine is frozen, can not perform operation')
processes = PipelineProcess.objects.filter(
root_pipeline_id=id)
if processes and processes[0].is_frozen:
return ActionResult(
result=False,
message=
'engine is frozen, can not perform operation')
if name:
status.name = name
if start:
status.started_time = timezone.now()
if to_state in states.ARCHIVED_STATES:
status.archived_time = timezone.now()
# from FINISHED to RUNNING
if states.is_rerunning(from_state=status.state,
to_state=to_state):
history = History.objects.record(status, is_rerunning=True)
if history:
LogEntry.objects.link_history(node_id=status.id,
history_id=history.id)
status.loop += 1
status.skip = False
status.version = uniqid()
status.state = to_state
status.save()
return ActionResult(result=True,
message='success',
extra=status)
else:
return ActionResult(
result=False,
message='can\'t transit state(%s) from %s to %s' %
(id, status.state, to_state),
extra=status)
def transit(self,
id,
to_state,
is_pipeline=False,
appoint=False,
start=False,
name='',
version=None):
"""
尝试改变某个节点的状态
:param id: 节点 ID
:param to_state: 目标状态
:param is_pipeline: 该节点是否是 pipeline
:param appoint: 该动作是否由用户发起（非引擎内部操作）
:param start: 是否刷新其开始事件
:param name: 节点名称
:param version: 节点版本
:return:
"""
defaults = {'name': name, 'state': to_state, 'version': uniqid()}
if start:
defaults['started_time'] = timezone.now()
_, created = self.get_or_create(id=id, defaults=defaults)
# reservation or first creation
if created:
return True
with transaction.atomic():
kwargs = {'id': id}
if version:
kwargs['version'] = version
try:
status = self.select_for_update().get(**kwargs)
except Status.DoesNotExist:
return False
if states.can_transit(from_state=status.state,
to_state=to_state,
is_pipeline=is_pipeline,
appoint=appoint):
# 在冻结状态下不能改变 pipeline 的状态
if is_pipeline:
subprocess_rel = SubProcessRelationship.objects.filter(
subprocess_id=id)
if subprocess_rel:
process = PipelineProcess.objects.get(
id=subprocess_rel[0].process_id)
if process.is_frozen:
return False
processes = PipelineProcess.objects.filter(
root_pipeline_id=id)
if processes and processes[0].is_frozen:
return False
status.state = to_state
if name:
status.name = name
if start:
status.started_time = timezone.now()
if to_state in states.ARCHIVED_STATES:
status.archived_time = timezone.now()
status.save()
return True
else:
return False