I am using EJB3, JPA2, hibernate 4
my requirements is :
1. Not use Auto Generation in db side bz some db backup related facility
2. high concurrent user use this table for CRUD operation purpose ?
3. My primary key column type is : Char/varchar ---String .
4. format is : 12 digit ( Year(2) + month (2)+ day(2) + serialNo(6))
what is logic of pk generation of this scenario (high concurrency , NO Auto generation in JPA/DB) ????????
Retrieving data ...