python實例26[將log同時寫入文件和顯示到UI的控件中]

特點：

1）此GlobalLogging 采用了singlten模式，全局唯一，必須通過getInstance方法來獲得GlobalLogging的實例；

2）此GlobalLogging可以采用logging提供的log handlers（例如log到console，file。。。），同時支持提供自定義函數來處理log的接口，可以自己定義如何處理log；

GlobalLogging的使用如下： (將系統的所有的函數的log，同時寫到log文件和UI中的text控件中)

from GlobalLogging import GlobalLogging

class A:
  def __init__(self):
    GlobalLogging.getInstance().setLoggingToHanlder(self.getLog)
    GlobalLogging.getInstance().setLoggingToFile('logfile.txt')
    GlobalLogging.getInstance().setLoggingLevel(logging.INFO)

  def getLog(self, s):
    self.outputText.append(s)

  def FA(self):
    GlobalLogging.getInstance().info('XXX')
    GlobalLogging.getInstance().error('XXX')

GlobalLogging代碼：

import logging

class NullHandler(logging.Handler):
  def emit(self, record): pass

class GlobalLogging:

  log = None

  @staticmethod
  def getInstance():
    if GlobalLogging.log == None:
      GlobalLogging.log = GlobalLogging()
    return GlobalLogging.log

  def __init__(self):
    self.logger = None
    self.handler = None
    self.level = logging.INFO
    self.logger = logging.getLogger("GlobalLogging")
    self.formatter = logging.Formatter("%(levelname)s - %(message)s")
    h = NullHandler()
    self.logger.addHandler(h)

def setLoggingToFile(self,file):
fh = logging.FileHandler(file)
      fh.setFormatter(self.formatter)
      self.logger.addHandler(ch)

  def setLoggingToConsole(self) :
      ch = logging.StreamHandler()
      ch.setFormatter(self.formatter)
      self.logger.addHandler(fh)

  def setLoggingToHanlder(self,handler):
      self.handler = handler

  def setLoggingLevel(self,level):
    self.level = level
    self.logger.setLevel(level)

  def debug(self,s):
      self.logger.debug(s)
      if not self.handler == None and self.level <= logging.DEBUG :
        print logging.DEBUG
        print self.level
        self.handler('debug:' + s)
  def info(self,s):
      self.logger.info(s)
      if not self.handler == None and self.level <= logging.INFO:
        self.handler('info:' + s)
  def warn(self,s):
      self.logger.warn(s)
      if not self.handler == None and self.level <= logging.WARNING:
        self.handler('warn:' + s)
  def error(self,s):
      self.logger.error(s)
      if not self.handler == None and self.level <= logging.ERROR:
        self.handler('error:' + s)
  def critical(self,s):
      self.logger.critical(s)
      if not self.handler == None and self.level <= logging.CRITICAL:
        self.handler('critical:' + s)

完！

posted @ 2011-04-08 18:41 iTech 閱讀(2923) 評論(1) 收藏舉報

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python實例26[將log同時寫入文件和顯示到UI的控件中]

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