How you create confirmation link for email?

In my project I need to send letter to user email with confirmation link. My solution: Add string column “code” and boolean column “is_active” (with default value false) to user table. When user …

Hibernate SaveOrUpdate – multiple workthreads

While I have been able to find information on how Hibernate’s transaction work, so the database doesn’t corrupted, it has been harder to understand how Hibernate treats an object which is shared …

How to connect in java as SYS to Oracle?

I receive this error: java.sql.SQLException: ORA-28009: connection as SYS should be as SYSDBA or SYSOPER How to fix? (I need to be SYS). Thanks.

Highest Performance Database in Java

I need ideas to implement a (really) high performance in-memory Database/Storage Mechanism in Java. In the range of storing 20,000+ java objects, updated every 5 or so seconds. Some options I am open …