Can you tell me about the key features of transaction management within Spring?

In Spring, transactions are managed using the PlatformTransactionManager abstraction and the @Transactional annotation. Key features:

• Declarative management: with @Transactional, you can specify that a method should run within a transaction, without explicit code for beginning/committing/rolling back.
• Support for various transaction types: Spring supports both local transactions (e.g., JDBC) and distributed transactions (JTA).
• Propagation: you can configure how a transaction behaves when called from another transactional method (e.g., REQUIRED, REQUIRES_NEW).
• Isolation and timeouts: you can set the isolation level and maximum execution time for a transaction.
• Exception handling: by default, transactions roll back on unchecked exceptions (RuntimeException), but behavior can be customized.

Example:

@Service
public class MyService {

    @Transactional
    public void updateData() {
        // database operations
    }
}