Memcache CachePool Configuration.
Memcache CachePool Service.
Memcache CachePool Mixin.
Memcache has no namespace support. In addition to that, the protocol disallow key listing.
The CachePool contract is to drop a cache once all of its references have been returned.
Therefore, all keys are prefixed, that way;
cacheIdis the identity of the requested cache
cacheInstanceIdis an autogenerated cache instance identifier
keyis the original key
In other words and for a given
cacheId, once all references of the Cache are returned to the
CachePool, the next
fetchCache(..) invocation will generate a new Cache instance identifier and
hence use different prefixed keys.
All this allow the Memcache EntityStore CachePool to conform to the CachePool contract despite limitations of the Memcache protocol.