commit changes in try-catch inside @Transactional

Question

Consider I have a method doing some stuff and logging mechanism in ActiveRecord pattern style:

@Transactional
public void doSmt() {
    try {
        someOpe         


        

Answer 1

Firstly, calling flush() is not going to do you any good: flush() does not commit anything and, as you are logging the error in the same transaction, the insert will be rolled back.

You therefore need to start a new 'nested' transaction to log the error.

public class A {

    @Autowired
    private B b;

    @Transactional
    public void doSmt() {
        try {
            someOperation(); // can throw exception
            b.logIntoDb(); // if everything is OK
        } catch {Exception e} {
            b.logIntoDbWithException(e.getMessage()); // log error into db

            throw new MyCustomException(e);
        }
    }
}

public class B{

    //outer transaction is still active
    public  void logIntoDb(String message) {
        final LogEntry logEntry = new LogEntry();
        logEntry.setDate(new Date());
        logEntry.setMessage(message);
        logEntry.persist();
    }

    // 'outer' transaction will be suspended until this method completes
    // this new transaction will commit/rollback independently of the outer transaction
    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public  void logIntoDbWithException(String message) {
        final LogEntry logEntry = new LogEntry();
        logEntry.setDate(new Date());
        logEntry.setMessage(message);
        logEntry.persist();
    }
}