java - Spring transactions: Method with requires_new called from a method with requires -

i understand when commit happens , when rollback happens in case of nested transaction different isolation levels calling , called methods,

for example, have 2 spring services , i'm calling method2 of service2 method1 of service1.

method1 having required transaction scope , method2 having requires_new transaction scope shown in program below.

service1 {   @transactional(propagation = propagation.required) method1() {     for(int i=0; i<10; i++){         service2.method2();     }      // more code takes time process }  }   service2 {  @transactional(propagation = propagation.requires_new)  method2()  {     //save information db     // save object using jpa  } } 

now question is, understand requires_new start new transaction, commit on existing method2 or spring waits till method1 completed , commits?

i'm interested in @ point of time commit happens , row lock in db gets released persisted in method2.

note: here have placed both methods in different services spring can achieve nested transaction.

thanks in advance,

vali

when enter method2 of service2, transaction of service1 (say tx1) suspended , new transaction created service2 (say tx2). new transaction independent of previous transaction , wither commit or rollback independently.

tx2 commit/rollback when return service2 , after tx1 resume point suspended. result of tx2 (commit or rollback) not affect behavior of tx1.

please read spring documentation here. check section 16.5.7 more information transaction propagation.