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Transaction
Use declarative transaction handling
See the spring reference guide for a detailed explanation of springs transaction management.
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Use the declarative way with @Transactional wherever possible.
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Only in reasonable cases manual programmatic transaction handling should be used.
See the transaction guide of quarkus for a detailed explanation.
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Use the declarative way with @Transactional wherever possible.
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Only in reasonable cases manual programmatic transaction handling should be used.
Handling constraint violations
Because database constraints are checked by the database when the transaction gets committed, constraint violations will be thrown outside the business code.
In case constraint violations have to be handled manually, it should be done in code outside the logic that is annotated with @Transactional.
This may be done in a service operation by catching a ConstraintViolationException (org.hibernate.exception.ConstraintViolationException for hibernate).