5 import logging, logging.handlers
7 CRITICAL=logging.CRITICAL
9 WARNING=logging.WARNING
13 # a logger that can handle tracebacks
15 def __init__ (self,logfile=None,loggername=None,level=logging.INFO):
16 # default is to locate loggername from the logfile if avail.
19 handler=logging.StreamHandler()
20 handler.setFormatter(logging.Formatter("%(levelname)s %(message)s"))
23 loggername=os.path.basename(logfile)
25 handler=logging.handlers.RotatingFileHandler(logfile,maxBytes=1000000, backupCount=5)
27 # This is usually a permissions error becaue the file is
28 # owned by root, but httpd is trying to access it.
29 tmplogfile=os.getenv("TMPDIR", "/tmp") + os.path.sep + os.path.basename(logfile)
30 handler=logging.handlers.RotatingFileHandler(tmplogfile,maxBytes=1000000, backupCount=5)
31 handler.setFormatter(logging.Formatter("%(asctime)s - %(levelname)s - %(message)s"))
33 self.logger=logging.getLogger(loggername)
34 self.logger.setLevel(level)
35 self.logger.addHandler(handler)
36 self.loggername=loggername
38 def setLevel(self,level):
39 self.logger.setLevel(level)
41 # shorthand to avoid having to import logging all over the place
42 def setLevelDebug(self):
43 self.logger.setLevel(logging.DEBUG)
45 # define a verbose option with s/t like
46 # parser.add_option("-v", "--verbose", action="count", dest="verbose", default=0)
47 # and pass the coresponding options.verbose to this method to adjust level
48 def setLevelFromOptVerbose(self,verbose):
50 self.logger.setLevel(logging.WARNING)
52 self.logger.setLevel(logging.INFO)
54 self.logger.setLevel(logging.DEBUG)
58 def wrapped(self,msg,*args,**kwds):
59 native=getattr(self.logger,fun.__name__)
60 return native(msg,*args,**kwds)
61 #wrapped.__doc__=native.__doc__
75 # logs an exception - use in an except statement
76 def log_exc(self,message):
77 self.error("%s BEG TRACEBACK"%message+"\n"+traceback.format_exc().strip("\n"))
78 self.error("%s END TRACEBACK"%message)
80 def log_exc_critical(self,message):
81 self.critical("%s BEG TRACEBACK"%message+"\n"+traceback.format_exc().strip("\n"))
82 self.critical("%s END TRACEBACK"%message)
84 # for investigation purposes, can be placed anywhere
85 def log_stack(self,message):
86 to_log="".join(traceback.format_stack())
87 self.debug("%s BEG STACK"%message+"\n"+to_log)
88 self.debug("%s END STACK"%message)
91 # import-related operations go in this file
92 _import_logger=_SfaLogger(logfile='/var/log/sfa_import.log')
93 # servers log into /var/log/sfa.log
94 _server_logger=_SfaLogger(logfile='/var/log/sfa.log')
95 # clients use the console
96 _console_logger=_SfaLogger()
98 # default is to use the server-side logger
99 _the_logger=_server_logger
101 # clients would change the default by issuing one of these call
102 def sfa_logger_goes_to_console():
103 current_module=sys.modules[globals()['__name__']]
104 current_module._the_logger=_console_logger
106 # clients would change the default by issuing one of these call
107 def sfa_logger_goes_to_import():
108 current_module=sys.modules[globals()['__name__']]
109 current_module._the_logger=_import_logger
111 # this is how to retrieve the 'right' logger
115 ########################################
120 Prints the runtime of the specified callable. Use as a decorator, e.g.,
126 def logger_profile(callable):
127 def wrapper(*args, **kwds):
129 result = callable(*args, **kwds)
131 args = map(str, args)
132 args += ["%s = %s" % (name, str(value)) for (name, value) in kwds.iteritems()]
133 # should probably use debug, but then debug is not always enabled
134 logger.info("PROFILED %s (%s): %.02f s" % (callable.__name__, ", ".join(args), end - start))
137 return logger_profile
140 if __name__ == '__main__':
141 print 'testing sfalogging into logger.log'
142 logger=_SfaLogger('logger.log')
143 logger.critical("logger.critical")
144 logger.error("logger.error")
145 logger.warning("logger.warning")
146 logger.info("logger.info")
147 logger.debug("logger.debug")
148 logger.setLevel(logging.DEBUG)
149 logger.debug("logger.debug again")
151 sfa_logger_goes_to_console()
152 my_logger=sfa_logger()
153 my_logger.info("redirected to console")
156 def sleep(seconds = 1):
159 my_logger.info('console.info')
161 my_logger.setLevel(logging.DEBUG)