@Cache notes

Cacheconcurrencystrategy.none, not applicable, default
Cacheconcurrencystrategy.read_only, read-only mode, in this mode, if the data is updated operation, there will be an exception ( for non-changed data use );
Cacheconcurrencystrategy.read_write, read-write mode in the update cache when the data in the cache will be replaced by a lock, other transactions if the corresponding cache data, found to be locked, directly to the database query ( based on the timestamp determination mechanism, For data synchronization requirements of strict conditions, the use of frequent );
Cacheconcurrencystrategy.nonstrict_read_write, the non-strict read-write mode does not cache data locking ( updates are infrequent for several hours or longer );
Cacheconcurrencystrategy.transactional, transaction mode refers to the cache support transaction, and when the transaction is rolled back, the cache can be rolled back, supporting only the JTA environment.