python tornado修改celery完成任務時的輸出

脫離版本講教程都是耍流氓：

protobuf==3.0.0
kombu==3.0.37
pika==0.9.14
celery==3.1.11
tornado==4.2
tornado-celery==0.3.5
tornado-redis==2.4.18

背景：

最近給tornado加一個任務隊列，celery，然後遇到這麼一個尷尬問題，因爲是傳序列化後的ProtoBuf對象進celery，返回也是一個ProtoBuf序列化後的對象，但celery會把這個對象打印出來，類似：

[2016-11-28 18:32:56,426: INFO/Worker-1] ==============IN handler_run==============
[2016-11-28 18:32:56,431: INFO/Worker-1] [100131][UpdateUserProfile 更新用戶信息請求]                                                                                                                                                                                
[2016-11-28 18:32:56,440: WARNING/Worker-1] G:\projects\myApp\venv\lib\site-packages\sqlalchemy\engine\default.py:450: Warning: Incorrect string value: '\xD6\xD0\xB9\xFA\xB1\xEA...' for column 'VARIABLE_VALUE' at row 478
  cursor.execute(statement, parameters)
[2016-11-28 18:32:56,540: INFO/Worker-1] ret = True
[2016-11-28 18:32:56,546: INFO/Worker-1] ==============out handler_run=============
[2016-11-28 18:32:56,552: INFO/MainProcess] Task task.app_handler_run[2e37711b-1ee3-4c1a-b840-949ddfc1f73a] succeeded in 0.125999927521s: (dp1
S'_rsp_item'
p2
S'\x08\xef\x07\x10\x01\x1a\x06\x08\x01\x12\x02OK"\xc3%\n\xc0%\x08\xa3\x8e\x06\x12\x15\xe6\x97\xa0\xe6\x95\x...

非常尷尬，給日誌文件帶來不便。

於是用全局搜索，找到G:\projects\myApp\venv\Lib\site-packages\celery\worker\job.py 的第101行：

    success_msg = """\
        Task %(name)s[%(id)s] succeeded in %(runtime)ss: %(return_value)s
    """

替換成：

    success_msg = """\
        Task %(name)s[%(id)s] succeeded in %(runtime)ss: xxx!
    """
    # success_msg = """\
    #     Task %(name)s[%(id)s] succeeded in %(runtime)ss: %(return_value)s
    # """

現在輸出就工整多了：

[2016-11-28 18:35:45,835: INFO/Worker-1] ==============IN handler_run==============
[2016-11-28 18:35:45,841: INFO/Worker-1] [100131][UpdateUserProfile 更新用戶信息請求]                                                                                                                                                                                
[2016-11-28 18:35:45,848: WARNING/Worker-1] G:\projects\myApp\venv\lib\site-packages\sqlalchemy\engine\default.py:450: Warning: Incorrect string value: '\xD6\xD0\xB9\xFA\xB1\xEA...' for column 'VARIABLE_VALUE' at row 478
  cursor.execute(statement, parameters)
[2016-11-28 18:35:45,956: INFO/Worker-1] ret = True
[2016-11-28 18:35:45,960: INFO/Worker-1] ==============out handler_run=============
[2016-11-28 18:35:45,973: INFO/MainProcess] Task task.app_handler_run[825cb52e-3db1-4cbe-b790-5c8629b8381d] succeeded in 0.138000011444s: xxx!