def flow_run(prj_id, flow_id):
"""
运行流程
给flowd发送一条运行流程的指令
:param prj_id: 项目ID
:param flow_id: 流程id
:return:
成功 OK, dict, 'no error'
失败 ERROR, None, reason
"""
status, project, reason = project_get_current()
if status != OK:
return return_error_payload(reason)
if project.id != prj_id:
return return_error_payload('不允许未执行的项目启动流程，当前执行的项目ID={}'.format(
project.id))
payload = {
'prj_id': prj_id,
'flow_id': flow_id,
}
flow_control_path = profile.get_flow_control_path()
request = Request('run', flow_control_path, payload=payload)
response = request.publish().wait_response()
return response.pairs()
def flow_get_control_command_length():
"""
获取控制命令列表长度
:return:
成功 OK, int, 'no error'
失败 ERROR, None, reason
"""
flow_control_path = profile.get_flow_control_path()
return llen(flow_control_path)
def flow_stop():
"""
停止流程
给flowd发送一条停止运行流程的指令
:return:
成功 OK, dict, 'no error'
失败 ERROR, None, reason
"""
flow_control_path = profile.get_flow_control_path()
request = Request('stop', flow_control_path, payload={})
response = request.publish().wait_response()
return response.pairs()
def flow_get_status_from_root():
"""
给flowd发送一条获取状态的指令
通过向flowd进程发送status指令获取精准的流程运行状态，这个接口的数据传输、等待成本较高，
若对状态的精准性要求不高可以调用接口：@flow_get_status_from_cache，直接从缓存获取。
:return:
成功 OK, dict, 'no error'
失败 ERROR, None, reason
"""
flow_control_path = profile.get_flow_control_path()
request = Request('status', flow_control_path, payload={})
response = request.publish().wait_response()
return response.pairs()
def flow_get_control_command():
"""
获取流程控制命令
一般用于flowd从redis缓存中获取其他进程对流程运行的控制指令，
例如，开始（run），停止（stop），状态（status）等
：:return
成功 OK, command, 'no error'
失败 ERROR, None, reason
"""
flow_control_path = profile.get_flow_control_path()
status, command_json, reason = lpop(flow_control_path)
if status != OK:
return return_error_payload(reason)
if command_json is None:
return return_warning_payload(reason)
try:
command = Request.load_request_from_json(command_json)
except KeyError as e:
return return_error_payload(E_KEY_ERROR, msg=str(e))
return return_ok_payload(command)
def make_subscriber(self):
self.pubsub = profile.alloc_subscriber()
self.pubsub.psubscribe(profile.get_flow_control_path())
self.pubsub.psubscribe(profile.get_flow_status_path())