Solutions to deal with high concurrency:
1. Put pressure on the database and add row-level locks.
select * from table for update;
2. Put the pressure on the application and add synchronized synchronization to the method.
Solutions to deal with high concurrency:
1. Put pressure on the database and add row-level locks.
select * from table for update;
2. Put the pressure on the application and add synchronized synchronization to the method.