Nested @Transactional methods with @Async

Question

I\'m using Spring with JPA. I have @EnableAsync and @EnableTransactionManagement turned on. In my user registration service method, I have a few other

Answer 1

Make a try by creating a new UserService class to manage user check, like so

@Override
@Transactional(propagation = Propagation.REQUIRES_NEW)
public User createOrUpdateUser(User newUser) {
    String username = newUser.getUsername();
    String email = newUser.getEmail();

    // ... Verify the user doesn't already exist

    // I have tried all manner of flushing and committing right here, nothing works
    newUser = userDAO.merge(newUser);
    return newUser;
}

then in the actual class, change

private User registerUser(User newUser, Boolean waitForAccount) {
    String username = newUser.getUsername();
    String email = newUser.getEmail();

    // ... Verify the user doesn't already exist

    // I have tried all manner of flushing and committing right here, nothing works
    newUser = userDAO.merge(newUser);

by

private User registerUser(User newUser, Boolean waitForAccount) {
    newUser = userService.createOrUpdateUser(newUser);

The new userService with @Transactional REQUIRES_NEW should force the commit and solve the issue.