Re: [Springframework-developer] Examples of PlatformTransactionManager?

[<jue...@we...>]

It's pretty simple: First, pass your PlatformTransactionManager bean via =
a bean reference to an application object (for example a controller), =
into a bean property of type PlatformTransactionManager. Then write code =
like the following, assuming a transactionManager reference:

  DefaultTransactionDefinition def =3D new =
DefaultTransactionDefinition()
  =
def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
  TransactionStatus status =3D =
transactionManager.getTransactionDefinition(def);
  try {
    ...
  }
  catch (MyException ex) {
    transactionManager.rollback(status);
    throw ex;
  }
  transactionManager.commit(status);

Note that you do not need to invoke rollback if commit failed (like with =
JTA), therefore the commit occurs after the try-catch block. You can =
throw any checked exception from within the try-catch block; that's the =
advantage over using TransactionTemplate which in other respects behaves =
exactly the same.

Suspend and resume do not have to be invoked directly but can be =
achieved by setting an appropriate propagation behavior, just like with =
declarative demarcation. If you change PROPAGATION_REQUIRED to =
PROPAGATION_REQUIRES_NEW in the example above, your block will execute =
in a new transaction, with the current one (if any) getting suspended at =
the beginning and resumed at the end.

Juergen


-----Original Message-----
From: spr...@li...
[mailto:spr...@li...]On Behalf
Of James Cook
Sent: Thursday, April 01, 2004 1:28 AM
To: spr...@li...
Subject: [Springframework-developer] Examples of
PlatformTransactionManager?


Are there any examples of how to use the PlatformTransactionManager
available anywhere? We are using Hibernate and JDBC and feel that there =
may
be instances where we will want to use this API instead of the
TransactionTemplate or declarative approach.

For starters, how does our controller class get access to a
PlatformTransaction Manager?

Is calling getTransaction(TransactionDefinition) the technique for =
beginning
a transaction?

Commit and rollback seemed straightforward, but what about suspend and
resume?

Thanks for any pointers





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