Hi,
on 2008-04-26, Michele Petrazzo posted code on this list
that implemented a MemoryStore. This is very useful for
embedded systems, where you want to minimise disk writes.
I use Micheles implementation since two years and it
works for me. Thanks to Michele (cc) for the enhancemnt!
Thanks for considering!
PS Micheles code is here:
class MemoryStore(web.session.Store):
"""Store for saving a session in memory.
Usefull where there is limited fs writes on the disk, like
flash memories
I save the data into a dict:
k: (time, pydata)
"""
def __init__(self, d_store=None):
if d_store is None:
d_store = {}
self.d_store = d_store
def __contains__(self, key):
return key in self.d_store
def __getitem__(self, key):
""" Return the value and update the last seen value
"""
t, value = self.d_store[key]
self.d_store[key] = (time.time(), value)
return value
def __setitem__(self, key, value):
self.d_store[key] = (time.time(), value)
def __delitem__(self, key):
del self.d_store[key]
def cleanup(self, timeout):
now = time.time()
to_del = []
for k, (atime, value) in self.d_store.iteritems():
if now - atime > timeout :
to_del.append(k)
#to avoid exception on "dict change during iterations"
for k in to_del:
del self.d_store[k]
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