PROPAGATION_REQUIRED behavior in spring?

Question

I have few questions on PROPAGATION_REQUIRED behaviour which i am not able to clarify on Spring Docs.

Scenario1:-

@Transactional
method1(){
// do some update without exception
}

Data will be committed as thread comes out of method1. Right ?

Scenario2:-

@Transactional
method1(){
// do some update without exception
method2();
}

@Transactional
method2(){
// do some update without exception
}

Data will be committed as thread comes out of method1. Right ?

Scenario3:-

@Transactional
method1(){
// do some update without exception
method2();
}

@Transactional
method2(){
 // some update in DB 
 throw new RunTimeException()
}

Nothing will be commited. Right ?

Scenario4:-

@Transactional
method1(){
// do some update without exception
method2();
}

@Transactional
method2(){
 // some update in DB 
 throw new SomeCheckedException()
}

whole transaction will be committed as thread comes out of method1 as checked exception is thrown. Though i could change this behaviour with @Transactional(rollbackFor=SomeCheckedException.class) Right ?

Please let me know if above understanding is correct.

Answer 1

Yes, checked exceptions don't automatically rollback the active transaction; only unchecked RuntimeException do.

If you want rollback for certain checked exceptions, you can use @Transactional(rollbackFor=SomeCheckedException.class)

Note: @Transactional has no effect when you call the method internally:

method1(){
  method2();
}

@Transactional
method2(){
  // some update in DB -> fails because there is no transaction
}

The annotation can only be applied when Spring can wrap the method call.