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Improve Cache code 

Removed _new flag. Slightly more stable and cleaner.
master
pictuga 2013-05-15 17:48:39 +02:00
parent bf647ba5f8
commit 2a71fe07f2
1 changed files with 16 additions and 15 deletions
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31
morss.py
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@ -104,19 +104,22 @@ class Cache:
"""Light, error-prone caching system.""" """Light, error-prone caching system."""
def __init__(self, folder, key): def __init__(self, folder, key):
self._key = key self._key = key
self._hash = str(hash(self._key))
self._dir = folder self._dir = folder
self._file = self._dir + "/" + str(hash(self._key)) self._file = self._dir + "/" + self._hash
self._new = not os.path.exists(self._file)
self._cached = {} # what *was* cached self._cached = {} # what *was* cached
self._cache = {} # new things to put in cache self._cache = {} # new things to put in cache
if not self._new: if os.path.exists(self._file):
data = open(self._file).read().split("\n")[1:] data = open(self._file).read().split("\n")
for line in data: for line in data:
key, bdata = line.split("\t", 1) if "\t" in line:
self._cached[key] = bdata key, bdata = line.split("\t", 1)
self._cached[key] = bdata
log(str(hash(self._key))) log(self._hash)
def __del__(self): def __del__(self):
self.save() self.save()
@ -134,28 +137,26 @@ class Cache:
def set(self, key, content): def set(self, key, content):
self._cache[key] = b64encode(content) self._cache[key] = b64encode(content)
if self._new:
self.save()
def save(self): def save(self):
if len(self._cache) == 0: if len(self._cache) == 0:
return return
txt = "" out = []
for (key, bdata) in self._cache.iteritems(): for (key, bdata) in self._cache.iteritems():
txt += "\n" + str(key) + "\t" + bdata out.append(str(key) + "\t" + bdata)
txt.strip() txt = "\n".join(out)
if not os.path.exists(self._dir): if not os.path.exists(self._dir):
os.makedirs(self._dir) os.makedirs(self._dir)
open(self._file, 'w').write(txt) with open(self._file, 'w') as file:
file.write(txt)
def isYoungerThan(self, sec): def isYoungerThan(self, sec):
if not os.path.exists(self._file): if not os.path.exists(self._file):
return False return False
return os.path.getmtime(self._file) > time.time()-sec return time.time() - os.path.getmtime(self._file) < sec
class XMLMap(object): class XMLMap(object):
""" """