Yes, I do this with JDO. Just add to you queue within the current
transaction, for instance;
PersistenceManager pm = PMF.get().getPersistenceManager();
try
{
//
// start transaction so we can atomically check the secondary key
//
pm.currentTransaction().begin();
//
// enqueue a task to process this ImportTask
//
//
String theUrl = "/tasks"; // whatever your url will be - this is is
your state;
Queue queue = QueueFactory.getDefaultQueue();
queue.add(
DatastoreServiceFactory.getDatastoreService().getCurrentTransaction(),
TaskOptions.Builder.url(theUrl));
//
// commit the transaction.
//
pm.currentTransaction().commit(); // we finished, so commit the
transaction.
}
catch(DataAccessException dae)
{
throw dae; // let prior DataAccessException leave.
}
catch(Exception e)
{
throw new DataAccessException(e); // wrap the exception in our
runtime exception.
}
finally
{
//
// if the transactions is still active, then there
// was an exception thrown. So we rollback the transaction.
//
if(pm.currentTransaction().isActive())
{
pm.currentTransaction().rollback();
}
//
// we always close the PersistenceManager when done.
//
if(!pm.isClosed())
{
pm.close();
}
}
On Jan 11, 10:45 am, Fabrizio Accatino <[email protected]> wrote:
> Hello,
>
> documentation tells I can insert a task in queue during a datastore
> transaction.http://code.google.com/appengine/docs/java/taskqueue/overview.html#Ta...
>
> The example uses datastore low level api. Is there a way to do the same with
> JDO?
>
> Thank you
>
> Fabrizio
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