Python twisted.python.log 模块，startLoggingWithObserver() 实例源码

def _setUpLogFile(self):
        self._tearDownLogFile()
        if self.logfile == '-':
            logFile = sys.stdout
        else:
            logFile = file(self.logfile, 'a')
        self._logFileObject = logFile
        self._logFileObserver = log.FileLogObserver(logFile)
        log.startLoggingWithObserver(self._logFileObserver.emit, 0)

def _setUpLogFile(self):
        self._tearDownLogFile()
        if self.logfile == '-':
            logFile = sys.stdout
        else:
            logFile = file(self.logfile, 'a')
        self._logFileObject = logFile
        self._logFileObserver = log.FileLogObserver(logFile)
        log.startLoggingWithObserver(self._logFileObserver.emit, 0)

def startLogging(prefix='Twisted', options=DEFAULT_OPTIONS,
                 facility=DEFAULT_FACILITY, setStdout=1):
    """
    Send all Twisted logging output to syslog from now on.

    The prefix, options and facility arguments are passed to
    C{syslog.openlog()}, see the Python syslog documentation for details. For
    other parameters, see L{twisted.python.log.startLoggingWithObserver}.
    """
    obs = SyslogObserver(prefix, options, facility)
    log.startLoggingWithObserver(obs.emit, setStdout=setStdout)

def _setUpLogFile(self):
        self._tearDownLogFile()
        if self.logfile == '-':
            logFile = sys.stdout
        else:
            logFile = open(self.logfile, 'a')
        self._logFileObject = logFile
        self._logFileObserver = log.FileLogObserver(logFile)
        log.startLoggingWithObserver(self._logFileObserver.emit, 0)

def start(self, logfile=None, application_name="ooniprobe"):
        from ooni.settings import config

        if not logfile:
            logfile = os.path.expanduser(config.basic.logfile)

        log_folder = os.path.dirname(logfile)
        if (not os.access(log_folder, os.W_OK) or
            (os.path.exists(logfile) and not os.access(logfile, os.W_OK))):
            # If we don't have permissions to write to the log_folder or
            # logfile.
            log_folder = config.running_path
            logfile = os.path.join(log_folder, "ooniprobe.log")

        self.log_filepath = logfile

        mkdir_p(log_folder)

        log_filename = os.path.basename(logfile)
        file_log_level = levels.get(config.basic.loglevel,
                                    levels['INFO'])
        stdout_log_level = levels['INFO']
        if config.advanced.debug:
            stdout_log_level = levels['DEBUG']

        if config.basic.rotate == 'daily':
            logfile = MyDailyLogFile(log_filename, log_folder)
        elif config.basic.rotate == 'length':
            logfile = LogFile(log_filename, log_folder,
                              rotateLength=int(human_size_to_bytes(
                                  config.basic.rotate_length
                              )),
                              maxRotatedFiles=config.basic.max_rotated_files)
        else:
            logfile = open(os.path.join(log_folder, log_filename), 'a')

        self.fileObserver = MsecLogObserver(logfile, log_level=file_log_level)
        self.stdoutObserver = StdoutStderrObserver(sys.stdout,
                                                   log_level=stdout_log_level)

        tw_log.startLoggingWithObserver(self.fileObserver.emit)
        tw_log.addObserver(self.stdoutObserver.emit)

        tw_log.msg("Starting %s on %s (%s UTC)" % (application_name,
                                                   otime.prettyDateNow(),
                                                   otime.prettyDateNowUTC()))