Rollback Examples

TestService.java

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Service
public class ExceptionService {

    public void throwException() throws Exception {
        throw new Exception("Throw me!");
    }

    @Transactional(rollbackFor = Exception.class)
    public void throwExceptionTransactional() throws Exception {
        throw new Exception("Throw me!");
    }

    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRES_NEW)
    public void throwExceptionTransactionalRequiresNew() throws Exception {
        throw new Exception("Throw me!");
    }

    @Transactional(rollbackFor = Exception.class, noRollbackFor= IllegalArgumentException.class)
    public void throwExceptionTransactionalNoRollbackFor() throws Exception {
        throw new IllegalArgumentException("Throw me!");
    }
}

UserService.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.Transactional;

@Service
public class UserService {

    @Autowired
    private ExceptionService exceptionService;

    @Autowired
    private UserRepository userRepository;

    @Transactional(rollbackFor = Exception.class)
    public void createUserEx1(String userName) {
        userRepository.save(getUser(userName));
        try {
            exceptionService.throwException();
        } catch (Exception e) {
            //caught exception never reaches proxy
        }
    }

    @Transactional(rollbackFor = Exception.class)
    public void createUserEx2(String userName) {
        userRepository.save(getUser(userName));
        try {
            exceptionService.throwExceptionTransactional();
        } catch (Exception e) {
            //caught exception but why is rollback happening?
        }
    }

    @Transactional(rollbackFor = Exception.class)
    public void createUserEx3(String userName) {
        userRepository.save(getUser(userName));
        try {
            exceptionService.throwExceptionTransactionalRequiresNew();
        } catch (Exception e) {
        }
    }
    @Transactional(rollbackFor = Exception.class, noRollbackFor = IllegalArgumentException.class)
    public void createUserEx4(String userName) {
        userRepository.save(getUser(userName));
        throw new IllegalArgumentException();
    }
}