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org.apache.polygene.cache.memcache.package.html Maven / Gradle / Ivy

    
        
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.