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# Copyright (c) 2003, The Regents of the University of California,
# through Lawrence Berkeley National Laboratory (subject to receipt of
# any required approvals from the U.S. Dept. of Energy). All rights
# reserved.
#
"""Logging"""
ident = "$Id: logging.py 1204 2006-05-03 00:13:47Z boverhof $"
import sys
WARN = 1
DEBUG = 2
class ILogger:
'''Logger interface, by default this class
will be used and logging calls are no-ops.
'''
level = 0
def __init__(self, msg):
return
def warning(self, *args):
return
def debug(self, *args):
return
def error(self, *args):
return
def setLevel(cls, level):
cls.level = level
setLevel = classmethod(setLevel)
debugOn = lambda self: self.level >= DEBUG
warnOn = lambda self: self.level >= WARN
class BasicLogger(ILogger):
last = ''
def __init__(self, msg, out=sys.stdout):
self.msg, self.out = msg, out
def warning(self, msg, *args):
if self.warnOn() is False: return
if BasicLogger.last != self.msg:
BasicLogger.last = self.msg
print >>self, "---- ", self.msg, " ----"
print >>self, " %s " %BasicLogger.WARN,
print >>self, msg %args
WARN = '[WARN]'
def debug(self, msg, *args):
if self.debugOn() is False: return
if BasicLogger.last != self.msg:
BasicLogger.last = self.msg
print >>self, "---- ", self.msg, " ----"
print >>self, " %s " %BasicLogger.DEBUG,
print >>self, msg %args
DEBUG = '[DEBUG]'
def error(self, msg, *args):
if BasicLogger.last != self.msg:
BasicLogger.last = self.msg
print >>self, "---- ", self.msg, " ----"
print >>self, " %s " %BasicLogger.ERROR,
print >>self, msg %args
ERROR = '[ERROR]'
def write(self, *args):
'''Write convenience function; writes strings.
'''
for s in args: self.out.write(s)
_LoggerClass = BasicLogger
def setBasicLogger():
'''Use Basic Logger.
'''
setLoggerClass(BasicLogger)
BasicLogger.setLevel(0)
def setBasicLoggerWARN():
'''Use Basic Logger.
'''
setLoggerClass(BasicLogger)
BasicLogger.setLevel(WARN)
def setBasicLoggerDEBUG():
'''Use Basic Logger.
'''
setLoggerClass(BasicLogger)
BasicLogger.setLevel(DEBUG)
def setLoggerClass(loggingClass):
'''Set Logging Class.
'''
assert issubclass(loggingClass, ILogger), 'loggingClass must subclass ILogger'
global _LoggerClass
_LoggerClass = loggingClass
def setLevel(level=0):
'''Set Global Logging Level.
'''
ILogger.level = level
def getLevel():
return ILogger.level
def getLogger(msg):
'''Return instance of Logging class.
'''
return _LoggerClass(msg)
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