Question

class MyService {


public void a() {
     synchronized(somekey) {
        b(); 
     }
  }

@Transactional(propagation = Propagation.REQUIRES_NEW)
  public void b() {
    ...do DB works...
  }
}

My aim is

1 - get the key

2 - start transaction

3 - commit transaction

4 - release the key

When i call a() method from outside, transaction doesn't work.

Any suggestions ?

Thanks.

Answer 1

Unless you’re using code weaving, this can’t work.

The default way Spring handles transactions is through AOP proxies. The call to a transactional method goes like this:

 caller --> ProxyClass.a() --> YourClass.a()

If you call another method on the same object, you’re not going through the proxy, so there is no transactional behaviour.

 caller --> ProxyClass.a() --> YourClass.a() --> YourClass.b()

If you don’t want to use AspectJ, you can get the proxy object using AopContext.currentProxy().