On Jun 23, 2010, at 4:11 PM, l.denardo wrote:
> I'm just giving a not-well-thought suggestion, but I'd rather use
> memcache for this.
>
> I guess something like using a time-dependent code as the key (i.e. a
> counter which increments every 30 seconds) and a list of user ids as
> the value, and simply doing a get() on the cache for the current
> counter value would work.
Alternatively, if you only want to see whether the user has polled, you could
use the key 'user_%s_polled', substituting %s for the user's id, and place it
in memcache with an expiration time of 30s. Every time you update the key, you
can reset the expiration time.
In Python, this would look like:
memcache.set("user_%s_polled" % user, True, time=30)
Simply getting the key would tell you whether or not the user has polled in the
last 30s. Memcache would then handle expiration; after 30s, the key is removed
for you.
Jan Michael Ibanez
[email protected]
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