e4d34f4130
We record the messages logged during that time to a recording log handler, then playback anything we caught after startup.
136 lines
3.1 KiB
Python
136 lines
3.1 KiB
Python
# coding=utf-8
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from __future__ import absolute_import
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import logging.handlers
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import os
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import re
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import time
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class CleaningTimedRotatingFileHandler(logging.handlers.TimedRotatingFileHandler):
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def __init__(self, *args, **kwargs):
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logging.handlers.TimedRotatingFileHandler.__init__(self, *args, **kwargs)
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# clean up old files on handler start
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if self.backupCount > 0:
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for s in self.getFilesToDelete():
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os.remove(s)
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class SerialLogHandler(logging.handlers.RotatingFileHandler):
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_do_rollover = False
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_suffix_template = "%Y-%m-%d_%H-%M-%S"
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_file_pattern = re.compile(r"^\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}$")
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@classmethod
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def on_open_connection(cls):
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cls._do_rollover = True
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def __init__(self, *args, **kwargs):
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logging.handlers.RotatingFileHandler.__init__(self, *args, **kwargs)
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self.cleanupFiles()
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def emit(self, record):
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logging.handlers.RotatingFileHandler.emit(self, record)
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def shouldRollover(self, record):
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return self.__class__._do_rollover
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def getFilesToDelete(self):
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"""
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Determine the files to delete when rolling over.
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"""
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dirName, baseName = os.path.split(self.baseFilename)
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fileNames = os.listdir(dirName)
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result = []
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prefix = baseName + "."
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plen = len(prefix)
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for fileName in fileNames:
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if fileName[:plen] == prefix:
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suffix = fileName[plen:]
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if self.__class__._file_pattern.match(suffix):
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result.append(os.path.join(dirName, fileName))
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result.sort()
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if len(result) < self.backupCount:
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result = []
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else:
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result = result[:len(result) - self.backupCount]
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return result
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def cleanupFiles(self):
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if self.backupCount > 0:
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for path in self.getFilesToDelete():
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os.remove(path)
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def doRollover(self):
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self.__class__._do_rollover = False
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if self.stream:
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self.stream.close()
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self.stream = None
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if os.path.exists(self.baseFilename):
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# figure out creation date/time to use for file suffix
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t = time.localtime(os.stat(self.baseFilename).st_mtime)
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dfn = self.baseFilename + "." + time.strftime(self.__class__._suffix_template, t)
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if os.path.exists(dfn):
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os.remove(dfn)
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os.rename(self.baseFilename, dfn)
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self.cleanupFiles()
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if not self.delay:
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self.stream = self._open()
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class RecordingLogHandler(logging.Handler):
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def __init__(self, target=None, level=logging.NOTSET):
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logging.Handler.__init__(self, level=level)
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self._buffer = []
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self._target = target
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def emit(self, record):
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self._buffer.append(record)
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def setTarget(self, target):
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self._target = target
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def flush(self):
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if not self._target:
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return
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self.acquire()
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try:
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for record in self._buffer:
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self._target.handle(record)
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self._buffer = []
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finally:
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self.release()
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def close(self):
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self.flush()
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self.acquire()
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try:
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self._buffer = []
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finally:
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self.release()
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def __len__(self):
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return len(self._buffer)
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class CombinedLogHandler(logging.Handler):
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def __init__(self, *handlers):
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logging.Handler.__init__(self)
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self._handlers = handlers
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def setHandlers(self, *handlers):
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self._handlers = handlers
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def handle(self, record):
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self.acquire()
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try:
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if self._handlers:
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for handler in self._handlers:
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handler.handle(record)
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finally:
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self.release()
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