How To Retry Transaction Via TransactionTemplate After OptimisticLockException Shaped Via Hibernate Version-less Optimistic Locking Mechanism

Note: Version-less optimistic locking doesn't work for detached entities (do not close the Persistence Context).

Description: This is a Spring Boot application that simulates a scenario that leads to an optimistic locking exception. When such exception occur, the application retry the corresponding transaction via db-util library developed by Vlad Mihalcea.

Key points:

• for Maven, in pom.xml, add the db-util dependency
• configure the OptimisticConcurrencyControlAspect bean
• rely on TransactionTemplate

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