pli/aspect/log.py

   1 #=======================================================================
   2 '''
   3 this module defines the logger aspects.
   4 '''
   5
   6 #-----------------------------------------------------------------------
   7
   8 __version__ = '''0.1.03'''
   9 __sub_version__ = '''20040212153738'''
  10 __copyright__ = '''(c) Alex A. Naanou 2003'''
  11
  12
  13
  14 #-----------------------------------------------------------------------
  15
  16 import sys
  17 import time
  18 import aspect
  19
  20
  21
  22 #-----------------------------------------------------------------------
  23 # LoggerAspect flags:
  24 # make the aspect pre-condirioned
  25 LOG_PRE = 1
  26 # make the aspect post-conditioned.
  27 LOG_POST = 2
  28
  29
  30 #--------------------------------------------------------LoggerAspect---
  31 # TODO make this thread-safe...
  32 #
  33 class LoggerAspect(aspect.Aspect):
  34         '''
  35         '''
  36         def __init__(self, file=None, mode=LOG_POST, format=None, verbosity=1):
  37                 '''
  38                 '''
  39                 self.file = file
  40                 self.mode = mode
  41                 self.verbosity = verbosity
  42                 if format == None:
  43                         self.format = '[%(time)s] [%(mode)s] --'
  44                 else:
  45                         self.format = format
  46         # this is the part that is not thread safe...
  47         def out(self, *pargs, **nargs):
  48                 '''
  49                 this is the output method...
  50                 '''
  51                 # do dynamic output file linking...
  52                 if self.file == None:
  53                         output = sys.stderr
  54                 else:
  55                         output = self.file
  56                 for i in pargs:
  57                         print >> output, i,
  58                 print >> output
  59         def pre(self, obj, meth, *pargs, **nargs):
  60                 '''
  61                 '''
  62                 if self.mode&LOG_PRE:
  63                         v = self.verbosity
  64                         if v < 1:
  65                                 pass
  66                         elif v == 1:
  67                                 self.out(self.format % {'time':time.strftime('%Y%m%d%H%M%S'), 'mode': 'pre'},\
  68                                                         meth.__name__)
  69                         elif v > 1:
  70                                 self.out(self.format % {'time':time.strftime('%Y%m%d%H%M%S'), 'mode': 'pre'},\
  71                                                         meth.__name__, *pargs, **nargs)
  72         def post(self, obj, meth, ret, rexcept, *pargs, **nargs):
  73                 '''
  74                 '''
  75                 if self.mode&LOG_POST:
  76                         v = self.verbosity
  77                         if v < 1:
  78                                 pass
  79                         elif v == 1:
  80                                 self.out(self.format % {'time':time.strftime('%Y%m%d%H%M%S'), 'mode': 'post'},\
  81                                                         meth.__name__, ret, rexcept)
  82                         elif v > 1:
  83                                 self.out(self.format % {'time':time.strftime('%Y%m%d%H%M%S'), 'mode': 'post'},\
  84                                                         meth.__name__, ret, rexcept, *pargs, **nargs)
  85
  86
  87
  88 #=======================================================================
  89 #                                            vim:set ts=4 sw=4 nowrap :