When should we use @transactional annotation?

The @Transactional should be used on service layer as it contains the business logic. The DAO layer usually has only database CRUD operations. Service layer is best place to add @Transactional annotations as most of the business logic present here, it contain detail level use-case behaviour.

What is the use of @transactional annotation in spring boot?

The @Transactional annotation makes use of the attributes rollbackFor or rollbackForClassName to rollback the transactions, and the attributes noRollbackFor or noRollbackForClassName to avoid rollback on listed exceptions. The default rollback behavior in the declarative approach will rollback on runtime exceptions.

Which methods should be annotated with transactional?

When using proxies, you should apply the @Transactional annotation only to methods with public visibility. If you do annotate protected, private or package-visible methods with the @Transactional annotation, no error is raised, but the annotated method does not exhibit the configured transactional settings.

Is @transactional needed?

@Transactional(propagation=Propagation. REQUIRED is the default propagation mode of Transaction, so you don’t need to explicitly set it.

Why do we need transactions in hibernate?

In hibernate framework, we have Transaction interface that defines the unit of work. It maintains abstraction from the transaction implementation (JTA,JDBC). A transaction is associated with Session and instantiated by calling session. beginTransaction().

What does it mean when something is transactional?

The definition of transactional is something related to a process or other action. An example of transactional is the process to negotiate a contract between two people. adjective.

What is the use of @transactional?

@Transactional annotation is used when you want the certain method/class(=all methods inside) to be executed in a transaction.

Why do we need a spring transaction?

Spring framework provides an abstract layer on top of different underlying transaction management APIs. Spring’s transaction support aims to provide an alternative to EJB transactions by adding transaction capabilities to POJOs. Spring supports both programmatic and declarative transaction management.

How does JPA handle transactions in Spring data?

You only need to annotate your interface, class, or method with Spring’s @Transactional annotation. Spring then wraps your service in a generated proxy that joins an active transaction or starts a new one and commits or rolls the transaction back after your method got executed.