Example of how you can use transactions in Spring Boot

Category : Spring Boot | Sub Category : Spring Boot | By Prasad Bonam Last updated: 2023-07-17 05:46:49 Viewed : 543

In Spring Boot, you can manage transactions using the @Transactional annotation. This annotation allows you to define the boundaries of a transactional operation, ensuring that it either succeeds as a whole or fails as a whole. Here are a few examples of how you can use transactions in Spring Boot:

1. Method-level Transaction:

javaCopy code
@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    @Transactional
    public void createUser(User user) {
        userRepository.save(user);
    }
}

In this example, the createUser method is annotated with @Transactional. When this method is invoked, a transaction will be created. If an exception occurs during the method execution, the transaction will be rolled back, and any changes made to the UserRepository will be undone.

2. Class-level Transaction:

javaCopy code
@Service
@Transactional
public class ProductService {

    @Autowired
    private ProductRepository productRepository;

    public void updateProduct(Product product) {
        productRepository.save(product);
    }

    public void deleteProduct(Long productId) {
        productRepository.deleteById(productId);
    }
}

In this example, the ProductService class is annotated with @Transactional. All public methods within this class will be transactional by default. If an exception occurs during any of the public method invocations, the transaction will be rolled back.

3. Propagation and Isolation Levels:

javaCopy code
@Service
public class OrderService {

    @Autowired
    private OrderRepository orderRepository;

    @Transactional(propagation = Propagation.REQUIRED, isolation = Isolation.READ_COMMITTED)
    public void createOrder(Order order) {
        // Perform some business logic
        orderRepository.save(order);
    }
}

In this example, the createOrder method is annotated with @Transactional and specifies the propagation and isolation levels. The propagation level is set to Propagation.REQUIRED, which means that if there is an existing transaction, the method will participate in it; otherwise, a new transaction will be created. The isolation level is set to Isolation.READ_COMMITTED, which ensures that the transaction can read only committed data.

These are just a few examples of how transactions can be used in Spring Boot. Remember to configure a transaction manager in your application context for the transaction management to work correctly.