Spring @Transaction method call by the method within the same class, does not work?

🌼 Understanding the issue with calling a @Transaction method within the same class in Spring 🌼

So you stumbled upon an interesting situation while working with Spring Transactions, huh? It seems that you're having trouble calling a method with the @Transactional annotation within the same class. Don't worry, you're not alone in this confusion! 🤔

The code snippet you shared gave us a clear understanding of what you're facing. Let's break it down and dive into the issue you're experiencing. 😎

🤷‍♂️ The problem

In your UserService class, you have defined two methods: addUser and addUsers. The addUser method is annotated with @Transactional to ensure transactional behavior. However, when you call addUser from the addUsers method within the same UserService class, the transactional behavior seems to be not working. 🙅‍♂️

🤔 Understanding the issue

Indeed, when you call a @Transactional method from within the same class, Spring cannot apply transactional behavior to that method. Why? Because Spring works as a proxy for your beans, introducing dynamic proxies to manage transactions. These proxies can only intercept calls to @Transactional methods when they come from another bean. 😮

✨ The solution

Luckily, there's a straightforward solution to this problem! To make the @Transactional annotation work when calling a method within the same class, you need to refactor your code slightly. Consider creating a separate bean (another class) that will act as the caller for your transactional method. This way, Spring can intercept the call and apply the transactional behavior properly. 🌟

Here's an updated version of your code to demonstrate how to resolve this issue:

public class UserService {

    @Autowired
    private UserCaller userCaller;

    public boolean addUsers(List<User> users) {
        for (User user : users) {
            userCaller.addUser(user.getUserName, user.getPassword);
        }
    } 
}

@Component
public class UserCaller {

    @Transactional
    public boolean addUser(String userName, String password) {
        try {
            // call DAO layer and add to the database.
        } catch (Throwable e) {
            TransactionAspectSupport.currentTransactionStatus()
                    .setRollbackOnly();
        }
    }
}

By creating the UserCaller class, we moved the addUser method to a separate bean. Now, when addUser is called from the addUsers method in the UserService class, Spring's proxy mechanism will work correctly, and the transactional behavior will be applied. Problem solved! 🎉

🚀 Take action and engage!

I hope this guide helped you understand and resolve the issue with calling a @Transactional method from within the same class. If you have any further questions or face any other roadblocks, feel free to reach out. I'm here to help! 🙌

Have you faced any similar Spring Transaction challenges? Share your experiences and solutions in the comments section below. Let's learn from each other and conquer Spring together! 🌱💪

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Until next time, happy coding! 💻🚀