Caching, memoization, and event-logging can be handled by wrapper objects that implement the interface so the base object doesn't need to contain all these laye

Caching, memoization, and event-logging can be handled by wrapper objects that implement the interface so the base object doesn't need to contain all these layers of outside concerns. Let each class focus on it's single area of use. interface Store { Query() } // these all have the Query() method type/class MySQL implements Store type/class Cache implements Store type/class Logger implements Store var db Store db = new Logger(new Cache(new MySQL()))