I want to know what actually happens when you annotate a method with @Transactional? Of course, I know that Spring will wrap that method in a Transaction. But, I have the following doubts: I heard...
I wanted to know when we should use @Transactional in Spring Boot Services. Since JpaRepository's save() method is annotated with @Tranasactional is it required for me to add that annotation in my
I used this annotation successfully for a Dao class. And rollback works for tests. But now I need to rollback real code, not just tests. There are special annotations for use in tests. But which
Can someone explain the isolation & propagation parameters in the @Transactional annotation via a real-world example? Basically when and why should I choose to change their default values?
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.
48 @Transactional on a class applies to each method on the service. It is a shortcut. Typically, you can set @Transactional(readOnly = true) on a service class, if you know that all methods will access the repository layer. You can then override the behavior with @Transactional on methods performing changes in your model.
It will use the same connection from the parent method (method with @Transactional) and any exception caused in the called method (method without @Transactional) will cause the transaction to rollback as configured in the transaction definition. If the @Async annotation is being used extra care should be taken with respect to transaction.
0 We use @Transactional annotation when we create/update one more entity at the same time. If the method which has @Transactional throws an exception, the annotation helps to roll back the previous inserts.
A non-transactional database would probably have better performance because it doesn't have to worry about rolling back changes. The individual data in the non-transactional database may not require transactional processing as would managing money between bank accounts.
