#!/usr/bin/python #---------------------------------------------------------------------- # Copyright (c) 2008 Board of Trustees, Princeton University # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and/or hardware specification (the "Work") to # deal in the Work without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Work, and to permit persons to whom the Work # is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Work. # # THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS # IN THE WORK. #---------------------------------------------------------------------- from __future__ import print_function import os, sys import traceback import logging, logging.handlers CRITICAL=logging.CRITICAL ERROR=logging.ERROR WARNING=logging.WARNING INFO=logging.INFO DEBUG=logging.DEBUG # a logger that can handle tracebacks class _SfaLogger: def __init__ (self,logfile=None,loggername=None,level=logging.INFO): # default is to locate loggername from the logfile if avail. if not logfile: #loggername='console' #handler=logging.StreamHandler() #handler.setFormatter(logging.Formatter("%(levelname)s %(message)s")) logfile = "/var/log/sfa.log" if not loggername: loggername=os.path.basename(logfile) try: handler=logging.handlers.RotatingFileHandler(logfile,maxBytes=1000000, backupCount=5) except IOError: # This is usually a permissions error because the file is # owned by root, but httpd is trying to access it. tmplogfile=os.path.join(os.getenv("TMPDIR", os.getenv("TMP", os.path.normpath("/tmp"))), os.path.basename(logfile)) tmplogfile = os.path.normpath(tmplogfile) tmpdir = os.path.dirname(tmplogfile) if tmpdir and tmpdir != "" and not os.path.exists(tmpdir): os.makedirs(tmpdir) # In strange uses, 2 users on same machine might use same code, # meaning they would clobber each others files # We could (a) rename the tmplogfile, or (b) # just log to the console in that case. # Here we default to the console. if os.path.exists(tmplogfile) and not os.access(tmplogfile,os.W_OK): loggername = loggername + "-console" handler = logging.StreamHandler() else: handler=logging.handlers.RotatingFileHandler(tmplogfile,maxBytes=1000000, backupCount=5) handler.setFormatter(logging.Formatter("%(asctime)s - %(levelname)s - %(message)s")) self.logger=logging.getLogger(loggername) self.logger.setLevel(level) # check if logger already has the handler we're about to add handler_exists = False for l_handler in self.logger.handlers: if l_handler.baseFilename == handler.baseFilename and \ l_handler.level == handler.level: handler_exists = True if not handler_exists: self.logger.addHandler(handler) self.loggername=loggername def setLevel(self,level): self.logger.setLevel(level) # shorthand to avoid having to import logging all over the place def setLevelDebug(self): self.logger.setLevel(logging.DEBUG) def debugEnabled (self): return self.logger.getEffectiveLevel() == logging.DEBUG # define a verbose option with s/t like # parser.add_option("-v", "--verbose", action="count", dest="verbose", default=0) # and pass the coresponding options.verbose to this method to adjust level def setLevelFromOptVerbose(self,verbose): if verbose==0: self.logger.setLevel(logging.WARNING) elif verbose==1: self.logger.setLevel(logging.INFO) elif verbose>=2: self.logger.setLevel(logging.DEBUG) # in case some other code needs a boolean def getBoolVerboseFromOpt(self,verbose): return verbose>=1 def getBoolDebugFromOpt(self,verbose): return verbose>=2 #################### def info(self, msg): self.logger.info(msg) def debug(self, msg): self.logger.debug(msg) def warn(self, msg): self.logger.warn(msg) # some code is using logger.warn(), some is using logger.warning() def warning(self, msg): self.logger.warning(msg) def error(self, msg): self.logger.error(msg) def critical(self, msg): self.logger.critical(msg) # logs an exception - use in an except statement def log_exc(self,message): self.error("%s BEG TRACEBACK"%message+"\n"+traceback.format_exc().strip("\n")) self.error("%s END TRACEBACK"%message) def log_exc_critical(self,message): self.critical("%s BEG TRACEBACK"%message+"\n"+traceback.format_exc().strip("\n")) self.critical("%s END TRACEBACK"%message) # for investigation purposes, can be placed anywhere def log_stack(self,message): to_log="".join(traceback.format_stack()) self.info("%s BEG STACK"%message+"\n"+to_log) self.info("%s END STACK"%message) def enable_console(self, stream=sys.stdout): formatter = logging.Formatter("%(message)s") handler = logging.StreamHandler(stream) handler.setFormatter(formatter) self.logger.addHandler(handler) info_logger = _SfaLogger(loggername='info', level=logging.INFO) debug_logger = _SfaLogger(loggername='debug', level=logging.DEBUG) warn_logger = _SfaLogger(loggername='warning', level=logging.WARNING) error_logger = _SfaLogger(loggername='error', level=logging.ERROR) critical_logger = _SfaLogger(loggername='critical', level=logging.CRITICAL) logger = info_logger sfi_logger = _SfaLogger(logfile=os.path.expanduser("~/.sfi/")+'sfi.log',loggername='sfilog', level=logging.DEBUG) ######################################## import time def profile(logger): """ Prints the runtime of the specified callable. Use as a decorator, e.g., @profile(logger) def foo(...): ... """ def logger_profile(callable): def wrapper(*args, **kwds): start = time.time() result = callable(*args, **kwds) end = time.time() args = map(str, args) args += ["%s = %s" % (name, str(value)) for (name, value) in kwds.iteritems()] # should probably use debug, but then debug is not always enabled logger.info("PROFILED %s (%s): %.02f s" % (callable.__name__, ", ".join(args), end - start)) return result return wrapper return logger_profile if __name__ == '__main__': print('testing sfalogging into logger.log') logger1=_SfaLogger('logger.log', loggername='std(info)') logger2=_SfaLogger('logger.log', loggername='error', level=logging.ERROR) logger3=_SfaLogger('logger.log', loggername='debug', level=logging.DEBUG) for (logger,msg) in [ (logger1,"std(info)"),(logger2,"error"),(logger3,"debug")]: print("====================",msg, logger.logger.handlers) logger.enable_console() logger.critical("logger.critical") logger.error("logger.error") logger.warn("logger.warning") logger.info("logger.info") logger.debug("logger.debug") logger.setLevel(logging.DEBUG) logger.debug("logger.debug again") @profile(logger) def sleep(seconds = 1): time.sleep(seconds) logger.info('console.info') sleep(0.5) logger.setLevel(logging.DEBUG) sleep(0.25)