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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 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
Why use @Transactional with @Service instead of with @Controller I USE THE @Transactional in @Controller and Just make a Generic Save Method and save all the entities model using this simple save method and if any method fail to save then all the transactions in controller rollback successfully Other situation that ensure that @Transactional should be use with @Controller In @Controller:
Spring transaction REQUIRED vs REQUIRES_NEW - Stack Overflow Using REQUIRES_NEW is only relevant when the method is invoked from a transactional context; when the method is invoked from a non-transactional context, it will behave exactly as REQUIRED - it will create a new transaction