87 lines
2.9 KiB
Python
87 lines
2.9 KiB
Python
"""`python-memcached`-compatible wrapper around `_pylibmc`.
|
|
|
|
>>> mc = Client(["127.0.0.1"])
|
|
>>> b = mc.behaviors
|
|
>>> b.keys()
|
|
['hash', 'connect timeout', 'cache lookups', 'buffer requests', 'verify key', 'support cas', 'poll timeout', 'no block', 'tcp nodelay', 'distribution', 'sort hosts']
|
|
>>> b["hash"]
|
|
'default'
|
|
>>> b["hash"] = 'fnv1a_32'
|
|
>>> mc.behaviors["hash"]
|
|
'fnv1a_32'
|
|
"""
|
|
|
|
import _pylibmc
|
|
|
|
__all__ = ["hashers", "distributions", "Client"]
|
|
|
|
hashers = {}
|
|
distributions = {}
|
|
# Not the prettiest way of doing things, but works well.
|
|
for name in dir(_pylibmc):
|
|
if name.startswith("hash_"):
|
|
hashers[name[5:]] = getattr(_pylibmc, name)
|
|
elif name.startswith("distribution_"):
|
|
distributions[name[13:].replace("_", " ")] = getattr(_pylibmc, name)
|
|
|
|
hashers_rvs = dict((v, k) for (k, v) in hashers.iteritems())
|
|
distributions_rvs = dict((v, k) for (k, v) in distributions.iteritems())
|
|
|
|
class BehaviorDict(dict):
|
|
def __init__(self, client, *args, **kwds):
|
|
super(BehaviorDict, self).__init__(*args, **kwds)
|
|
self.client = client
|
|
|
|
def __setitem__(self, name, value):
|
|
super(BehaviorDict, self).__setitem__(name, value)
|
|
self.client.behaviors = self
|
|
|
|
def update(self, *args, **kwds):
|
|
super(BehaviorDict, self).update(*args, **kwds)
|
|
self.client.behaviors = self
|
|
|
|
class Client(_pylibmc.client):
|
|
def __init__(self, servers, *args, **kwds):
|
|
addr_tups = []
|
|
for server in servers:
|
|
addr = server
|
|
port = 11211
|
|
if server.startswith("udp:"):
|
|
stype = _pylibmc.server_type_udp
|
|
addr = addr[4:]
|
|
if ":" in server:
|
|
(addr, port) = addr.split(":", 1)
|
|
port = int(port)
|
|
elif ":" in server:
|
|
stype = _pylibmc.server_type_tcp
|
|
(addr, port) = server.split(":", 1)
|
|
port = int(port)
|
|
elif "/" in server:
|
|
stype = _pylibmc.server_type_unix
|
|
port = 0
|
|
else:
|
|
stype = _pylibmc.server_type_tcp
|
|
addr_tups.append((stype, addr, port))
|
|
super(Client, self).__init__(addr_tups)
|
|
|
|
def get_behaviors(self):
|
|
behaviors = super(Client, self).get_behaviors()
|
|
behaviors["hash"] = hashers_rvs[behaviors["hash"]]
|
|
behaviors["distribution"] = distributions_rvs[behaviors["distribution"]]
|
|
return BehaviorDict(self, behaviors)
|
|
|
|
def set_behaviors(self, behaviors):
|
|
# Morph some.
|
|
behaviors = behaviors.copy()
|
|
if behaviors.get("hash", None) in hashers:
|
|
behaviors["hash"] = hashers[behaviors["hash"]]
|
|
if behaviors.get("distribution") in distributions:
|
|
behaviors["distribution"] = distributions[behaviors["distribution"]]
|
|
return super(Client, self).set_behaviors(behaviors)
|
|
|
|
behaviors = property(get_behaviors, set_behaviors)
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
doctest.testmod()
|