Mercurial > MadButterfly
diff pyink/data_monitor.py @ 1253:07e0cb1e051d
Add class consistency_checker for domview_ui.
- consistency_checker is to check consistency of the DOM-tree
associated with a domview_ui.
- It is so closed to domview_ui, so it may access private
variables.
- But, it uses public interface of domview_ui if possible.
- consistency_checker is not integrated to domview_ui for separating
functions of consistency checking from the domview_ui. It collects
relative logic into a place and setups a boundary from others.
| author | Thinker K.F. Li <thinker@codemud.net> |
|---|---|
| date | Tue, 11 Jan 2011 11:43:32 +0800 |
| parents | |
| children | 0cb5979549be |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pyink/data_monitor.py Tue Jan 11 11:43:32 2011 +0800 @@ -0,0 +1,57 @@ +import os + +## \brief Monitor accessing on the dta model. +# +# This class is a meta-class that monitor data accessing for its instance +# classes. +# +# 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._domview.lock(): # can not lock + if debug_level >= 1: + print ' fault to lock' + pass + return + + try: + func(self, *args, **kws) + finally: + self._domview.unlock() + pass + pass + return sentinel + + for attr_name in clazz_dict: + if (not attr_name.startswith('do')) 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 +