Tag: jpa

JPA Persistence/Transactions

When involving several calls to your DAO methods in a single transactions, here’s a great place to start: Java Persistence/Transactions

Here’s a small stub for kick-off:

UserTransaction tr = null;
try {
  tr = (UserTransaction) new InitialContext().lookup("javax.transaction.UserTransaction");
  tr.begin();

  bean.op1();
  bean.op2();
  // ...
  bean.opN();

  tr.commit();
} catch (Exception e) {
  logErrorMessage(e); // log error message

  if (tr != null) {
    try {
      tr.rollback();
    } catch (Exception e1) {
      logErrorMessage(e); // log error message
    }
  }
}