Mercurial > MadButterfly
view pyink/data_monitor.py @ 1413:b8dfa491ed9d
Use app.refresh() instead of redraw_changed()
author | Thinker K.F. Li <thinker@codemud.net> |
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date | Wed, 06 Apr 2011 11:14:15 +0800 |
parents | cfbc0f3e54e3 |
children |
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import os ## \brief Monitor accessing on the dta model. # # This class is a meta-class that monitor data accessing for its instance # classes. # # It is a monitor with a small modification. The calling would be # rejected when the domview_ui was locked. It will not waiting for a # lock. # # \see http://en.wikipedia.org/wiki/Monitor_%28synchronization%29 # # All methods, of instance classes, who's name is prefixed with 'do' are # monitored. When a monitored method was called, monitor will try to lock # _domview of the object. The method is only called if successfully acquiring # the lock, or return immediately. The lock is released after the calling # returned. # class data_monitor(type): def __new__(mclazz, name, bases, clazz_dict): debug_level = 0 if os.environ.has_key('DATA_MONITOR_DBG'): debug_level = int(os.environ['DATA_MONITOR_DBG']) pass def gen_sentinel(func_name, func): def sentinel(self, *args, **kws): if debug_level >= 1: print 'calling %s.%s' % (name, func_name) pass if debug_level >= 2: print ' args: %s' % (repr(args)) print ' kws: %s' % (repr(kws)) pass if not self._locker.lock(): # can not lock if debug_level >= 1: print ' fault to lock' pass return try: func(self, *args, **kws) finally: self._locker.unlock() pass pass return sentinel monitor_prefix = 'do' if clazz_dict.has_key('__data_monitor_prefix__'): monitor_prefix = clazz_dict['__data_monitor_prefix__'] pass for attr_name in clazz_dict: if (not attr_name.startswith(monitor_prefix)) or \ (not callable(clazz_dict[attr_name])): continue clazz_dict[attr_name] = \ gen_sentinel(attr_name, clazz_dict[attr_name]) pass clazz = type.__new__(mclazz, name, bases, clazz_dict) return clazz pass