[英]Python Persist Log File Stream with PyInotify
我遇到一個問題,即通過pyinotify
及其線程持久保存日志文件寫入流。 我正在使用pyinotify
監視目錄中的CLOSE_WRITE
文件事件。 在初始化pyinotify
之前,我使用內置的logging
模塊創建日志流,如下所示:
import os, logging
from logging import handlers
from logging.config import dictConfig
log_dir = './var/log'
name = 'com.sadmicrowave.tesseract'
LOG_SETTINGS = { 'version' : 1
,'handlers': { 'core': {
# make the logger a rotating file handler so the file automatically gets archived and a new one gets created, preventing files from becoming too large they are unmaintainable.
'class' : 'logging.handlers.RotatingFileHandler'
# by setting our logger to the DEBUG level (lowest level) we will include all other levels by default
,'level' : 'DEBUG'
# this references the 'core' handler located in the 'formatters' dict element below
,'formatter' : 'core'
# the path and file name of the output log file
,'filename' : os.path.join(log_dir, "%s.log" % name)
,'mode' : 'a'
# the max size we want to log file to reach before it gets archived and a new file gets created
,'maxBytes' : 100000
# the max number of files we want to keep in archive
,'backupCount' : 5 }
}
# create the formatters which are referenced in the handlers section above
,'formatters': {'core': {'format': '%(levelname)s %(asctime)s %(module)s|%(funcName)s %(lineno)d: %(message)s'
}
}
,'loggers' : {'root': {
'level' : 'DEBUG' # The most granular level of logging available in the log module
,'handlers' : ['core']
}
}
}
# use the built-in logger dict configuration tool to convert the dict to a logger config
dictConfig(LOG_SETTINGS)
# get the logger created in the config and named root in the 'loggers' section of the config
__log = logging.getLogger('root')
因此,在我的__log
變量初始化之后,它可以立即工作,允許進行日志寫入。 我想接下來啟動pyinotify
實例,並想使用以下類定義傳遞__log
:
import asyncore, pyinotify
class Notify (object):
def __init__ (self, log=None, verbose=True):
wm = pyinotify.WatchManager()
wm.add_watch( '/path/to/folder/to/monitor/', pyinotify.IN_CLOSE_WRITE, proc_fun=processEvent(log, verbose) )
notifier = pyinotify.AsyncNotifier(wm, None)
asyncore.loop()
class processEvent (pyinotify.ProcessEvent):
def __init__ (self, log=None, verbose=True):
log.info('logging some cool stuff')
self.__log = log
self.__verbose = verbose
def process_IN_CLOSE_WRITE (self, event):
print event
在上面的實現中,我的process_IN_CLOSE_WRITE
方法完全從pyinotify.AsyncNotifier
得到了預期的pyinotify.AsyncNotifier
; 但是,用於logging some cool stuff
的日志行永遠不會寫入日志文件。
我覺得這與通過pyinotify線程過程持久化文件流有關; 但是,我不確定該如何解決。
有任何想法嗎?
我可能已經找到了一種可行的解決方案。 不確定這是否是最好的方法,因此我暫時將OP保持打開狀態,以查看是否發布了其他任何想法。
我認為我在處理pyinotify.AsyncNotifier
設置錯誤。 我將實現更改為:
class Notify (object):
def __init__ (self, log=None, verbose=True):
notifiers = []
descriptors = []
wm = pyinotify.WatchManager()
notifiers.append ( pyinotify.AsyncNotifier(wm, processEvent(log, verbose)) )
descriptors.append( wm.add_watch( '/path/to/folder/to/monitor/', pyinotify.IN_CLOSE_WRITE, proc_fun=processEvent(log, verbose), auto_add=True )
asyncore.loop()
現在,當我的包裝器類processEvents
在偵聽器實例化時觸發,並且從CLOSE_WRITE
事件觸發事件時, log
對象將得到適當維護和傳遞,並且可以接收寫入事件。
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