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- Spring - @Transactional - What happens in background?
For target beans annotated with @Transactional, Spring will create a TransactionInterceptor, and pass it to the generated proxy object So when you call the method from client code, you're calling the method on the proxy object, which first invokes the TransactionInterceptor (which begins a transaction), which in turn invokes the method on your
- transações - Funcionamento do @Transactional do Spring Framework . . .
Agora imagine que você anotou o método de inserção do DAO2 com @Transactional(propagation=Propagation REQUIRES_NEW) (algo que fazia sentido em determinado pedaço da sua aplicação) Caso faça isso o seu método de negócio não vai mais fazer rollback do que foi inserido no DAO2 (já que o insert acontece em sua própria transação)
- java - What does @Transactional do? - Stack Overflow
The transactional only changes your database connection to not auto commit – OQJF Commented Jul 10,
- java - What is the difference between defining @Transactional on class . . .
The @Transactional annotation on the class level will be applied to every method in the class However, when a method is annotated with @Transactional (like, updateFoo(Foo foo)) this will take precedence over the transactional settings defined at the class level More info: Transaction management in Spring
- Annotation @Transactional. How to rollback? - Stack Overflow
It really works this way :-) If you have a service calling several DAOs, the service needs to have a @Transactional annotation as well Otherwise each DAO call start and commits new transaction before you throw an exception in the service The bottom line is: the exception must leave (escape) a method marked as @Transactional –
- What are advantages of using @Transactional(readOnly = true)?
From the explanation of Oliver Gierke - the Spring Data author: Reading methods like findAll() and findOne(…) are using @Transactional(readOnly = true) which is not strictly necessary but triggers a few optimizations in the transaction infrastructure (setting the FlushMode to MANUAL to let persistence providers potentially skip dirty checks when closing the EntityManager)
- java - @Transactional, method inside method - Stack Overflow
I mean, a method should be Transactional when it have to be all done in a same transaction, and this depends for the programmer and the business logic For example, Option A is correct if the 'generate' method contains logic to be done in the same Transaction , so if something in the generate method fails, all the changes are undone
- When should we use @Transactional annotation? - Stack Overflow
@Transactional public void saveEmployee(Employee employee) { repo save(employee) userTrackerRepo update() or any other repo invocation or validation that if fails then save method should do rollback } Then it make senses to have @Transactional annotation
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