Package org.apache.polygene.cache.memcache

Memcache EntityStore CachePool.

See: Description

Interface Summary

Interface	Description
MemcacheConfiguration	Memcache CachePool Configuration.
MemcachePoolService	Memcache CachePool Service.

Class Summary

Class	Description
MemcachePoolMixin	Memcache CachePool Mixin.

Package org.apache.polygene.cache.memcache Description

Memcache EntityStore CachePool.

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;

cacheId.cacheInstanceId.key

• cacheId is the identity of the requested cache
• cacheInstanceId is an autogenerated cache instance identifier
• key is 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.