Its as safe as doing a containsKey on ConcurrentHashMap and then doing an operation.
On 26 Feb 2012, at 21:53, Simone Tripodi wrote: > that's not what I said, what I'm saying is that *in DM*, given the > actual implementation, would be wrong - other cache solutions maybe > have smarter keys management. > > just for the record: Memcached is one of the production ready cache > solution that doesn't have a method for checking a key exists in the > storage <http://code.sixapart.com/svn/memcached/trunk/server/doc/protocol.txt>
