-import logging
-import os
+#!/usr/bin/python
+
+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"))
+ else:
+ 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 becaue the file is
+ # owned by root, but httpd is trying to access it.
+ tmplogfile=os.getenv("TMPDIR", "/tmp") + os.path.sep + os.path.basename(logfile)
+ 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)
+ self.logger.addHandler(handler)
+ self.loggername=loggername
+
+ def setLevel(self,level):
+ self.logger.setLevel(level)
-#SFA access log initialization
-TMPDIR = os.getenv("TMPDIR", "/tmp")
-SFA_HTTPD_ACCESS_LOGFILE = TMPDIR + "/" + 'sfa_httpd_access.log'
-SFA_ACCESS_LOGFILE='/var/log/sfa_access.log'
-logger=logging.getLogger()
-#logger.setLevel(logging.INFO)
-logger.setLevel(logging.DEBUG)
-
-try:
- logfile=logging.FileHandler(SFA_ACCESS_LOGFILE)
-except IOError:
- # This is usually a permissions error becaue the file is
- # owned by root, but httpd is trying to access it.
- logfile=logging.FileHandler(SFA_HTTPD_ACCESS_LOGFILE)
+ # shorthand to avoid having to import logging all over the place
+ def setLevelDebug(self):
+ self.logger.setLevel(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)
+
+ ####################
+ def wrap(fun):
+ def wrapped(self,msg,*args,**kwds):
+ native=getattr(self.logger,fun.__name__)
+ return native(msg,*args,**kwds)
+ #wrapped.__doc__=native.__doc__
+ return wrapped
+
+ @wrap
+ def critical(): pass
+ @wrap
+ def error(): pass
+ @wrap
+ def warning(): pass
+ @wrap
+ def info(): pass
+ @wrap
+ def debug(): pass
+
+ # 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)
-formatter = logging.Formatter("%(asctime)s - %(levelname)s - %(message)s")
-logfile.setFormatter(formatter)
-logger.addHandler(logfile)
-def get_sfa_logger():
- return logger
-
-# logs an exception - use in an except statement
-def log_exc(message):
- logger.error("%s BEG TRACEBACK"%message+"\n"+traceback.format_exc().strip("\n"))
- logger.error("%s END TRACEBACK"%message)
+ # for investigation purposes, can be placed anywhere
+ def log_stack(self,message):
+ to_log="".join(traceback.format_stack())
+ self.debug("%s BEG STACK"%message+"\n"+to_log)
+ self.debug("%s END STACK"%message)
+
+####################
+# import-related operations go in this file
+_import_logger=_SfaLogger(logfile='/var/log/sfa_import.log')
+# servers log into /var/log/sfa.log
+_server_logger=_SfaLogger(logfile='/var/log/sfa.log')
+# clients use the console
+_console_logger=_SfaLogger()
+
+# default is to use the server-side logger
+_the_logger=_server_logger
+
+# clients would change the default by issuing one of these call
+def sfa_logger_goes_to_console():
+ current_module=sys.modules[globals()['__name__']]
+ current_module._the_logger=_console_logger
+
+# clients would change the default by issuing one of these call
+def sfa_logger_goes_to_import():
+ current_module=sys.modules[globals()['__name__']]
+ current_module._logger=_sfa_import_logger
+
+# this is how to retrieve the 'right' logger
+def sfa_logger():
+ return _the_logger
+
+########################################
+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.items()]
+ # 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
+
-# for investigation purposes, can be placed anywhere
-def log_stack(message):
- to_log="".join(traceback.format_stack())
- logger.debug("%s BEG STACK"%message+"\n"+to_log)
- logger.debug("%s END STACK"%message)
+if __name__ == '__main__':
+ print 'testing sfalogging into logger.log'
+ logger=_SfaLogger('logger.log')
+ logger.critical("logger.critical")
+ logger.error("logger.error")
+ logger.warning("logger.warning")
+ logger.info("logger.info")
+ logger.debug("logger.debug")
+ logger.setLevel(logging.DEBUG)
+ logger.debug("logger.debug again")
+ sfa_logger_goes_to_console()
+ my_logger=sfa_logger()
+ my_logger.info("redirected to console")
+
+ @profile(my_logger)
+ def sleep(seconds = 1):
+ time.sleep(seconds)
+
+ my_logger.info('console.info')
+ sleep(0.5)
+ my_logger.setLevel(logging.DEBUG)
+ sleep(0.25)
git://git.onelab.eu / sfa.git / blobdiff