py.lib

Yohn Y. 2023-01-28 Parent:log/tiny_slog.py@fe4a96d06243

py.lib/log/log_syslog.py

. Наведение порядка в коде логирования

awgur@28	1 # coding: utf-8
awgur@28	2 """
awgur@28	3 Тривиальная реализация сислоггера без блэк-джека и поэтесс
awgur@28	4
awgur@28	5 Метки в журнале о уровне сообщения:
awgur@28	6 "`": Debug
awgur@28	7 ".": Info
awgur@28	8 "*": Warning
awgur@28	9 "!": Error
awgur@28	10 "#": Alert
awgur@28	11
awgur@28	12 """
awgur@30	13 from time import monotonic
awgur@28	14 from datetime import timedelta
awgur@28	15
awgur@28	16 import syslog
awgur@28	17 from traceback import extract_tb, extract_stack
awgur@28	18 from sys import exc_info
awgur@28	19
awgur@28	20
awgur@28	21 class Timing(object):
awgur@28	22 def __init__(self, name=None):
awgur@28	23 if name is None:
awgur@28	24 self.prefix = ''
awgur@43	25
awgur@28	26 else:
awgur@43	27 self.prefix = f'{name} :: '
awgur@43	28
awgur@30	29 self.tsAll = monotonic()
awgur@28	30 self.ts = self.tsAll
awgur@28	31
awgur@43	32 def get_time(self):
awgur@30	33 return monotonic() - self.ts
awgur@28	34
awgur@28	35 def reset(self):
awgur@30	36 self.ts = monotonic()
awgur@28	37 self.tsAll = self.ts
awgur@28	38
awgur@28	39 def __str__(self):
awgur@30	40 ts = monotonic()
awgur@28	41 return self.prefix + '%s(%.4f)' % (timedelta(seconds=(ts - self.tsAll)), ts - self.ts)
awgur@28	42
awgur@28	43 def __call__(self, msg):
awgur@43	44 _buf = f'{self} \| {msg}'
awgur@30	45 self.ts = monotonic()
awgur@28	46 return _buf
awgur@28	47
awgur@28	48
awgur@43	49 class SysLogger(object):
awgur@28	50 @staticmethod
awgur@28	51 def init_syslog(ident):
awgur@28	52 syslog.openlog(ident, syslog.LOG_PID)
awgur@28	53
awgur@28	54 @staticmethod
awgur@28	55 def get_timing(name=None):
awgur@28	56 return Timing(name)
awgur@28	57
awgur@29	58 def __init__(self, prefix='main', facility=syslog.LOG_USER):
awgur@28	59 self.prefix = str(prefix)
awgur@28	60 self.facility = facility
awgur@28	61
awgur@28	62 def _write(self, flag, mark, msg):
awgur@28	63 for l in str(msg).splitlines():
awgur@43	64 syslog.syslog(self.facility \| flag, f'{mark} {self.prefix} \| {l}')
awgur@28	65
awgur@28	66 def __call__(self, msg):
awgur@28	67 self._write(syslog.LOG_INFO, '.', msg)
awgur@28	68
awgur@28	69 def err(self, msg):
awgur@28	70 self._write(syslog.LOG_ERR, '!', msg)
awgur@28	71
awgur@28	72 def warn(self, msg):
awgur@28	73 self._write(syslog.LOG_WARNING, '*', msg)
awgur@28	74
awgur@28	75 def debug(self, msg):
awgur@28	76 self._write(syslog.LOG_DEBUG, '`', msg)
awgur@28	77
awgur@28	78 def alert(self, msg):
awgur@28	79 self._write(syslog.LOG_ALERT, '#', msg)
awgur@28	80
awgur@28	81 def sub_log(self, prefix):
awgur@43	82 return self.__class__(f'{self.prefix}/{prefix}', self.facility)
awgur@28	83
awgur@28	84 def excpt(self, msg, e_class=None, e_obj=None, e_tback=None, stack_skip=0):
awgur@28	85 if e_class is None:
awgur@28	86 e_class, e_obj, e_tback = exc_info()
awgur@28	87
awgur@28	88 tb_data_tb = list(extract_tb(e_tback))[::-1]
awgur@28	89 tb_data_stack = list(extract_stack())[::-1][(2 + stack_skip):]
awgur@28	90
awgur@28	91 self.err(msg)
awgur@28	92 self.err('--- EXCEPTION ---')
awgur@43	93 self.err(f' {e_class.__name__} ({e_obj})')
awgur@28	94
awgur@28	95 self.err('--- TRACEBACK ---')
awgur@28	96 for _tb_file, _tb_line, _tb_func, _tb_text in tb_data_tb:
awgur@43	97 self.err(f'File: {_tb_file}, line {_tb_line} in {_tb_func}')
awgur@43	98 self.err(f' {_tb_text}')
awgur@28	99
awgur@28	100 self.err('>>> Exception Handler <<<')
awgur@28	101 for _tb_file, _tb_line, _tb_func, _tb_text in tb_data_stack:
awgur@43	102 self.err(f'File: {_tb_file}, line {_tb_line} in {_tb_func}')
awgur@43	103 self.err(f' {_tb_text}')
awgur@28	104
awgur@28	105 self.err('--- END EXCEPTION ---')