Canceling long-running queries

[Lawrence Gerstley]

Hello,

If you're using Cayenne as the ORM in a thick desktop client (e.g.,  
RCP), and executing a long-running query, is there a Cayenne  
methodology for interrupting and canceling such a query, or would one  
just use normal threading?

Thanks--Lawrence

[Evgeny Ryabitskiy]

Hello!
You can create separate DataContext and bind it to your separate
thread. Then you can stop you thread anytime.
 Also you can bind transaction to thread (if you want to rollback changes).

See:

1)http://cayenne.apache.org/doc20/api/cayenne/org/apache/cayenne/access/DataContext.html#createDataContext()

2)  http://cayenne.apache.org/doc20/api/cayenne/org/apache/cayenne/access/DataContext.html#bindThreadDataContext(org.apache.cayenne.access.DataContext)

3)  http://cayenne.apache.org/doc20/api/cayenne/org/apache/cayenne/access/Transaction.html#bindThreadTransaction(org.apache.cayenne.access.Transaction)

Evgeny Ryabitskiy



2009/10/20 Lawrence Gerstley <[hidden email]>:
> Hello,
>
> If you're using Cayenne as the ORM in a thick desktop client (e.g., RCP),
> and executing a long-running query, is there a Cayenne methodology for
> interrupting and canceling such a query, or would one just use normal
> threading?
>
> Thanks--Lawrence
>