Python logging.raiseExceptions() Examples

def callHandlers(self, record):
		# this is the same as Python 3.5's logging.Logger.callHandlers
		c = self
		found = 0
		while c:
			for hdlr in c.handlers:
				found = found + 1
				if record.levelno >= hdlr.level:
					hdlr.handle(record)
			if not c.propagate:
				c = None  # break out
			else:
				c = c.parent
		if (found == 0):
			if logging.lastResort:
				if record.levelno >= logging.lastResort.level:
					logging.lastResort.handle(record)
			elif logging.raiseExceptions and not self.manager.emittedNoHandlerWarning:
				sys.stderr.write("No handlers could be found for logger"
								 " \"%s\"\n" % self.name)
				self.manager.emittedNoHandlerWarning = True 

def test_error_handling(self):
        h = TestStreamHandler(BadStream())
        r = logging.makeLogRecord({})
        old_raise = logging.raiseExceptions
        old_stderr = sys.stderr
        try:
            h.handle(r)
            self.assertIs(h.error_record, r)
            h = logging.StreamHandler(BadStream())
            sys.stderr = sio = io.StringIO()
            h.handle(r)
            self.assertIn('\nRuntimeError: deliberate mistake\n',
                          sio.getvalue())
            logging.raiseExceptions = False
            sys.stderr = sio = io.StringIO()
            h.handle(r)
            self.assertEqual('', sio.getvalue())
        finally:
            logging.raiseExceptions = old_raise
            sys.stderr = old_stderr

# -- The following section could be moved into a server_helper.py module
# -- if it proves to be of wider utility than just test_logging 

def Parser_debug(enable, stream=None):
    '''
    Enables/Disables debug logger for parser.py

    NOTE: This is not really multi-thread friendly

    @param stream: StringIO stream to use
    @param enable: Enable/disable debug stream
    '''
    global debug
    debug = enable

    if enable:
        logging.raiseExceptions = False
        log.setLevel(logging.DEBUG)
        ch = logging.StreamHandler(stream)
        log.addHandler(ch) 

def test_error_handling(self):
        h = TestStreamHandler(BadStream())
        r = logging.makeLogRecord({})
        old_raise = logging.raiseExceptions

        try:
            h.handle(r)
            self.assertIs(h.error_record, r)

            h = logging.StreamHandler(BadStream())
            with support.captured_stderr() as stderr:
                h.handle(r)
                msg = '\nRuntimeError: deliberate mistake\n'
                self.assertIn(msg, stderr.getvalue())

            logging.raiseExceptions = False
            with support.captured_stderr() as stderr:
                h.handle(r)
                self.assertEqual('', stderr.getvalue())
        finally:
            logging.raiseExceptions = old_raise

# -- The following section could be moved into a server_helper.py module
# -- if it proves to be of wider utility than just test_logging 

def test_last_resort(self):
        # Test the last resort handler
        root = self.root_logger
        root.removeHandler(self.root_hdlr)
        old_lastresort = logging.lastResort
        old_raise_exceptions = logging.raiseExceptions

        try:
            with support.captured_stderr() as stderr:
                root.debug('This should not appear')
                self.assertEqual(stderr.getvalue(), '')
                root.warning('Final chance!')
                self.assertEqual(stderr.getvalue(), 'Final chance!\n')

            # No handlers and no last resort, so 'No handlers' message
            logging.lastResort = None
            with support.captured_stderr() as stderr:
                root.warning('Final chance!')
                msg = 'No handlers could be found for logger "root"\n'
                self.assertEqual(stderr.getvalue(), msg)

            # 'No handlers' message only printed once
            with support.captured_stderr() as stderr:
                root.warning('Final chance!')
                self.assertEqual(stderr.getvalue(), '')

            # If raiseExceptions is False, no message is printed
            root.manager.emittedNoHandlerWarning = False
            logging.raiseExceptions = False
            with support.captured_stderr() as stderr:
                root.warning('Final chance!')
                self.assertEqual(stderr.getvalue(), '')
        finally:
            root.addHandler(self.root_hdlr)
            logging.lastResort = old_lastresort
            logging.raiseExceptions = old_raise_exceptions 

def test_with_other_error_in_flush_without_raise(self):
        logging.raiseExceptions = False
        self._test_with_failure_in_method('flush', IndexError) 

def test_with_other_error_in_acquire_with_raise(self):
        logging.raiseExceptions = True
        self.assertRaises(IndexError, self._test_with_failure_in_method,
                          'acquire', IndexError) 

def test_with_other_error_in_flush_with_raise(self):
        logging.raiseExceptions = True
        self.assertRaises(IndexError, self._test_with_failure_in_method,
                          'flush', IndexError) 

def test_with_other_error_in_close_with_raise(self):
        logging.raiseExceptions = True
        self.assertRaises(IndexError, self._test_with_failure_in_method,
                          'close', IndexError) 

def test_log_invalid_level_with_raise(self):
        with swap_attr(logging, 'raiseExceptions', True):
            self.assertRaises(TypeError, self.logger.log, '10', 'test message') 

def test_log_invalid_level_no_raise(self):
        with swap_attr(logging, 'raiseExceptions', False):
            self.logger.log('10', 'test message')  # no exception happens 

def config_logging(self, logdir, loglevel, logfile):
        """ set up some logging """
        global LOG_PATH, LOG, logging_initialized

        LOG_PATH = os.path.join(logdir, logfile)
        LOG_PATH = os.path.expanduser(LOG_PATH)
        LOG = logging.getLogger(__name__)

        # Only do this once! (mostly for pytest)
        if logging_initialized:
            LOG.info("Logging already initialized.")
            return
        logging_initialized = True

        # Ignore syslog errors from message-too-long
        logging.raiseExceptions = False

        try:
            numeric_level = getattr(logging, loglevel)
            logging.getLogger().setLevel(numeric_level)
        except AttributeError as e:
            logging.getLogger().setLevel(logging.INFO)
            LOG.warning("Invalid logging level specified. Using INFO level")

        if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
            self += Debugger()

        file_handler = RotatingFileHandler(LOG_PATH, maxBytes=10000000,
                                           backupCount=10)
        file_handler.setFormatter(logging.Formatter(self.FILE_LOG_FORMAT))
        logging.getLogger().addHandler(file_handler)
        syslog = logging.handlers.SysLogHandler()
        syslog.setFormatter(logging.Formatter(self.SYSLOG_LOG_FORMAT))
        logging.getLogger().addHandler(syslog)
        stderr = logging.StreamHandler()
        stderr.setFormatter(logging.Formatter(self.STDERR_LOG_FORMAT))
        logging.getLogger().addHandler(stderr)
        # Add password redacting filter for logging.
        syslog.addFilter(RedactingFilter())
        file_handler.addFilter(RedactingFilter())
        stderr.addFilter(RedactingFilter()) 

def init(log_file=None):
        """Intializes the Vlog module.  Causes Vlog to write to 'log_file' if
        not None.  Should be called after all Vlog objects have been created.
        No logging will occur until this function is called."""

        if Vlog.__inited:
            return

        Vlog.__inited = True
        logging.raiseExceptions = False
        Vlog.__log_file = log_file
        for f in FACILITIES:
            logger = logging.getLogger(f)
            logger.setLevel(logging.DEBUG)

            try:
                if f == "console":
                    logger.addHandler(logging.StreamHandler(sys.stderr))
                elif f == "syslog":
                    logger.addHandler(logging.handlers.SysLogHandler(
                        address="/dev/log",
                        facility=logging.handlers.SysLogHandler.LOG_DAEMON))
                elif f == "file" and Vlog.__log_file:
                    Vlog.__file_handler = logging.FileHandler(Vlog.__log_file)
                    logger.addHandler(Vlog.__file_handler)
            except (IOError, socket.error):
                logger.setLevel(logging.CRITICAL)

        ovs.unixctl.command_register("vlog/reopen", "", 0, 0,
                                     Vlog._unixctl_vlog_reopen, None)
        ovs.unixctl.command_register("vlog/set", "spec", 1, sys.maxint,
                                     Vlog._unixctl_vlog_set, None)
        ovs.unixctl.command_register("vlog/list", "", 0, 0,
                                     Vlog._unixctl_vlog_list, None) 

def test_with_other_error_in_acquire_without_raise(self):
        logging.raiseExceptions = False
        self._test_with_failure_in_method('acquire', IndexError) 

def setUp(self):
        super(ShutdownTest, self).setUp()
        self.called = []

        raise_exceptions = logging.raiseExceptions
        self.addCleanup(setattr, logging, 'raiseExceptions', raise_exceptions) 

def test_with_other_error_in_acquire_without_raise(self):
        logging.raiseExceptions = False
        self._test_with_failure_in_method('acquire', IndexError) 

def test_with_other_error_in_flush_without_raise(self):
        logging.raiseExceptions = False
        self._test_with_failure_in_method('flush', IndexError) 

def test_with_other_error_in_acquire_with_raise(self):
        logging.raiseExceptions = True
        self.assertRaises(IndexError, self._test_with_failure_in_method,
                          'acquire', IndexError) 

def test_with_other_error_in_flush_with_raise(self):
        logging.raiseExceptions = True
        self.assertRaises(IndexError, self._test_with_failure_in_method,
                          'flush', IndexError) 

def test_with_other_error_in_close_with_raise(self):
        logging.raiseExceptions = True
        self.assertRaises(IndexError, self._test_with_failure_in_method,
                          'close', IndexError) 

def test_log_invalid_level_with_raise(self):
        with support.swap_attr(logging, 'raiseExceptions', True):
            self.assertRaises(TypeError, self.logger.log, '10', 'test message') 

def test_log_invalid_level_no_raise(self):
        with support.swap_attr(logging, 'raiseExceptions', False):
            self.logger.log('10', 'test message')  # no exception happens 

def init(verbosity=logging.INFO, color=True, indent_with=4,
         regular_fmt='%(levelname)-8s %(message)s',
         verbose_fmt='%(asctime)s %(levelname)-8s %(name)10.10s: %(message)s',
         debug=False):
    global _indent_width, _console_handler, _init_handler
    _indent_width = indent_with
    signal.log_error_func = lambda m: log_error(m, signal.logger)

    root_logger = logging.getLogger()
    root_logger.setLevel(logging.DEBUG)

    error_handler = ErrorSignalHandler(logging.DEBUG)
    root_logger.addHandler(error_handler)

    _console_handler = logging.StreamHandler()
    if color:
        formatter = ColorFormatter
    else:
        formatter = LineFormatter
    if verbosity:
        _console_handler.setLevel(logging.DEBUG)
        _console_handler.setFormatter(formatter(verbose_fmt))
    else:
        _console_handler.setLevel(logging.INFO)
        _console_handler.setFormatter(formatter(regular_fmt))
    root_logger.addHandler(_console_handler)

    buffer_capacity = os.getenv('WA_LOG_BUFFER_CAPACITY',
                                DEFAULT_INIT_BUFFER_CAPACITY)
    _init_handler = InitHandler(buffer_capacity)
    _init_handler.setLevel(logging.DEBUG)
    root_logger.addHandler(_init_handler)

    logging.basicConfig(level=logging.DEBUG)
    if not debug:
        logging.raiseExceptions = False

    logger = logging.getLogger('CGroups')
    logger.info = logger.debug 

def setUp(self):
        super(ShutdownTest, self).setUp()
        self.called = []

        raise_exceptions = logging.raiseExceptions
        self.addCleanup(setattr, logging, 'raiseExceptions', raise_exceptions) 

def handleError(self, record: logging.LogRecord) -> None:
        if logging.raiseExceptions:
            # Fail the test if the log message is bad (emit failed).
            # The default behavior of logging is to print "Logging error"
            # to stderr with the call stack and some extra details.
            # pytest wants to make such mistakes visible during testing.
            raise 

def test_error_handling(self):
        h = TestStreamHandler(BadStream())
        r = logging.makeLogRecord({})
        old_raise = logging.raiseExceptions

        try:
            h.handle(r)
            self.assertIs(h.error_record, r)

            h = logging.StreamHandler(BadStream())
            with support.captured_stderr() as stderr:
                h.handle(r)
                msg = '\nRuntimeError: deliberate mistake\n'
                self.assertIn(msg, stderr.getvalue())

            logging.raiseExceptions = False
            with support.captured_stderr() as stderr:
                h.handle(r)
                self.assertEqual('', stderr.getvalue())
        finally:
            logging.raiseExceptions = old_raise

# -- The following section could be moved into a server_helper.py module
# -- if it proves to be of wider utility than just test_logging 

def test_last_resort(self):
        # Test the last resort handler
        root = self.root_logger
        root.removeHandler(self.root_hdlr)
        old_lastresort = logging.lastResort
        old_raise_exceptions = logging.raiseExceptions

        try:
            with support.captured_stderr() as stderr:
                root.debug('This should not appear')
                self.assertEqual(stderr.getvalue(), '')
                root.warning('Final chance!')
                self.assertEqual(stderr.getvalue(), 'Final chance!\n')

            # No handlers and no last resort, so 'No handlers' message
            logging.lastResort = None
            with support.captured_stderr() as stderr:
                root.warning('Final chance!')
                msg = 'No handlers could be found for logger "root"\n'
                self.assertEqual(stderr.getvalue(), msg)

            # 'No handlers' message only printed once
            with support.captured_stderr() as stderr:
                root.warning('Final chance!')
                self.assertEqual(stderr.getvalue(), '')

            # If raiseExceptions is False, no message is printed
            root.manager.emittedNoHandlerWarning = False
            logging.raiseExceptions = False
            with support.captured_stderr() as stderr:
                root.warning('Final chance!')
                self.assertEqual(stderr.getvalue(), '')
        finally:
            root.addHandler(self.root_hdlr)
            logging.lastResort = old_lastresort
            logging.raiseExceptions = old_raise_exceptions 

def setUp(self):
        super(ShutdownTest, self).setUp()
        self.called = []

        raise_exceptions = logging.raiseExceptions
        self.addCleanup(setattr, logging, 'raiseExceptions', raise_exceptions) 

def test_with_other_error_in_acquire_without_raise(self):
        logging.raiseExceptions = False
        self._test_with_failure_in_method('acquire', IndexError) 

def test_with_other_error_in_flush_without_raise(self):
        logging.raiseExceptions = False
        self._test_with_failure_in_method('flush', IndexError)