Mercurial > MadButterfly
comparison 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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| 1252:71222a6b4c06 | 1253:07e0cb1e051d |
|---|---|
| 1 import os | |
| 2 | |
| 3 ## \brief Monitor accessing on the dta model. | |
| 4 # | |
| 5 # This class is a meta-class that monitor data accessing for its instance | |
| 6 # classes. | |
| 7 # | |
| 8 # All methods, of instance classes, who's name is prefixed with 'do' are | |
| 9 # monitored. When a monitored method was called, monitor will try to lock | |
| 10 # _domview of the object. The method is only called if successfully acquiring | |
| 11 # the lock, or return immediately. The lock is released after the calling | |
| 12 # returned. | |
| 13 # | |
| 14 class data_monitor(type): | |
| 15 def __new__(mclazz, name, bases, clazz_dict): | |
| 16 debug_level = 0 | |
| 17 if os.environ.has_key('DATA_MONITOR_DBG'): | |
| 18 debug_level = int(os.environ['DATA_MONITOR_DBG']) | |
| 19 pass | |
| 20 | |
| 21 def gen_sentinel(func_name, func): | |
| 22 def sentinel(self, *args, **kws): | |
| 23 if debug_level >= 1: | |
| 24 print 'calling %s.%s' % (name, func_name) | |
| 25 pass | |
| 26 if debug_level >= 2: | |
| 27 print ' args: %s' % (repr(args)) | |
| 28 print ' kws: %s' % (repr(kws)) | |
| 29 pass | |
| 30 | |
| 31 if not self._domview.lock(): # can not lock | |
| 32 if debug_level >= 1: | |
| 33 print ' fault to lock' | |
| 34 pass | |
| 35 return | |
| 36 | |
| 37 try: | |
| 38 func(self, *args, **kws) | |
| 39 finally: | |
| 40 self._domview.unlock() | |
| 41 pass | |
| 42 pass | |
| 43 return sentinel | |
| 44 | |
| 45 for attr_name in clazz_dict: | |
| 46 if (not attr_name.startswith('do')) or \ | |
| 47 (not callable(clazz_dict[attr_name])): | |
| 48 continue | |
| 49 clazz_dict[attr_name] = \ | |
| 50 gen_sentinel(attr_name, clazz_dict[attr_name]) | |
| 51 pass | |
| 52 | |
| 53 clazz = type.__new__(mclazz, name, bases, clazz_dict) | |
| 54 | |
| 55 return clazz | |
| 56 pass | |
| 57 |