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minor changes...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2011-12-09 01:25:12 +04:00
parent fafc050e45
commit 9973ad216a
1 changed files with 21 additions and 6 deletions
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25
index.py
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@ -1,7 +1,7 @@
#======================================================================= #=======================================================================
__version__ = '''0.0.01''' __version__ = '''0.0.01'''
__sub_version__ = '''20111208164549''' __sub_version__ = '''20111209012407'''
__copyright__ = '''(c) Alex A. Naanou 2011''' __copyright__ = '''(c) Alex A. Naanou 2011'''
@ -309,6 +309,7 @@ def pack_file_index(path, ext='.json', pack_ext='.pack', keep_files=False, keep_
pass pass
z.close() z.close()
##!!! get path by name helper...
#----------------------------------------------------------------------- #-----------------------------------------------------------------------
@ -385,6 +386,8 @@ class Index(mapping.Mapping):
yield os.path.splitext(name)[0] yield os.path.splitext(name)[0]
REMOVED = object()
class IndexWithCache(Index): class IndexWithCache(Index):
''' '''
''' '''
@ -396,7 +399,10 @@ class IndexWithCache(Index):
''' '''
''' '''
if name in self._cache: if name in self._cache:
return self._cache[name] res = self._cache[name]
if res is REMOVED:
raise KeyError, name
return res
res = self._cache[name] = super(IndexWithCache, self).__getitem__(name) res = self._cache[name] = super(IndexWithCache, self).__getitem__(name)
return res return res
def __setitem__(self, name, value): def __setitem__(self, name, value):
@ -409,7 +415,9 @@ class IndexWithCache(Index):
def __delitem__(self, name): def __delitem__(self, name):
''' '''
''' '''
raise NotImplementedError self._cache[name] = REMOVED
if self.__sync__:
self.cache_flush(name)
def __iter__(self): def __iter__(self):
''' '''
''' '''
@ -421,7 +429,10 @@ class IndexWithCache(Index):
yield e yield e
# cache management... # cache management...
##!!! test !!!## ##!!! removed items will not get flushed yet...
# XXX to make removing elements history compatible, one way to go
# is to write a specifc value to the file, thus making it
# shadow the original value...
def cache_flush(self, *keys): def cache_flush(self, *keys):
''' '''
''' '''
@ -429,9 +440,13 @@ class IndexWithCache(Index):
return save_file_index(self._cache, self._path) return save_file_index(self._cache, self._path)
flush = {} flush = {}
for k in keys: for k in keys:
if k is REMOVED:
# remove file...
## raise NotImplementedError
##!!!
continue
flush[k] = self[k] flush[k] = self[k]
return save_file_index(flush, self._path) return save_file_index(flush, self._path)
def cache_drop(self): def cache_drop(self):
''' '''
''' '''