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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
Where does the @Transactional annotation belong? @Transactional Annotations should be placed around all operations that are inseparable Using @Transactional transaction propagation are handled automatically In this case if another method is called by current method,then that method will have the option of joining the ongoing transaction So lets take example: We have 2 model's i e Country
Spring @Transactional - isolation, propagation - Stack Overflow @Transactional annotation describes transaction attributes on a method or class @Autowired private TestDAO testDAO; @Transactional(propagation=TransactionDefinition PROPAGATION_REQUIRED,isolation=TransactionDefinition ISOLATION_READ_UNCOMMITTED) public void someTransactionalMethod(User user) { Interact with testDAO }
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
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)
How to use @Transactional with Spring Data? - Stack Overflow You may add @Transactional later if you plan to add more logic to your service that deals with another tables repositories - then there will be a point having it If no - then your service should use @Transactional if you want to make sure you do not have issues with isolation, that you are not reading something that is not yet commuted for
java - javax. transaction. Transactional vs org. springframework . . . Spring has defined its own Transactional annotation to make Spring bean methods transactional, years ago Java EE 7 has finally done the same thing and now allows CDI bean methods to be transactional, in addition to EJB methods So since Java EE 7, it also defines its own Transactional annotation (it obviously can't reuse the Spring one)
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
java - @Async and @Transactional - Stack Overflow @Transactional commonly works with thread-bound transactions managed by PlatformTransactionManager, exposing a transaction to all data access operations within the current execution thread Note: This does not propagate to newly started threads within the method @Transactional is powered by Aspect-Oriented Programming Therefore, processing
java - Spring JPA repository transactionality - Stack Overflow In spring-data-jpa:2 0 9, there is no @Transactional annotation in the source code of JpaRepository or its ancestors - the default transactionality seems to be applied at runtime Also note that if you put @Transactional( custom properties