Re: Prevayler Facade

@Transaction or @Query?

On Wed, Jul 22, 2009 at 2:32 PM, Diego Miranda<[email protected]> wrote:
> That's  right! A @Transaction annotation is enough, then the Proxy can infer
> the type of transaction. Actually i'm not using a default transaction when
> the method is not marked. I've been thinking in adding some attributes to
> the annotations, like encrypt="true" but i havent time to implement this
> yet.
>
> D.
>
> On Wed, Jul 22, 2009 at 1:17 PM, Klaus Wuestefeld
> <[email protected]> wrote:
>>
>> Interesting.
>>
>> Void methods without the annotation can default to Transaction.
>> Methods with a return value and without an annotation can default to
>> TransactionWithQuery.
>>
>> So I think you might only need the @Query annotation. It that right?
>>
>> See you, Klaus.
>>
>>
>>
>> On Wed, Jul 22, 2009 at 12:03 PM, Diego Miranda<[email protected]>
>> wrote:
>> > Hi all!
>> >
>> > For a project i'm developing i wrote a simple proxy that implements the
>> > transactions using annotations.
>> > Rigth now, this proxy needs that you implement an interface with the
>> > annotations. But the idea is that you
>> > define your prevalent object (without any interface) with those
>> > annotations.
>> > These annotations are the prevayler
>> > transactions:
>> >
>> > @Query
>> > @Transaction
>> > @TransactionWithQuery
>> >
>> > An example, following the prevayler demo examples:
>> >
>> > public interface IBank implements Serializable {
>> >
>> >        @TransactionWithQuery public Account createAccount (String
>> > holder)
>> > throws Account.InvalidHolder;
>> >        @Transaction public void deleteAccount(long number) throws
>> > AccountNotFound;
>> >
>> > }
>> >
>> > The implementation of IBank:
>> >
>> > public class Bank implements IBank {
>> >
>> >     ...
>> >     public Account createAccount(String holder) throws
>> > Account.InvalidHolder
>> > {
>> >         Account account = new Account(nextAccountNumber, holder);
>> >         accountsByNumber.put(new Long(nextAccountNumber++), account);
>> >
>> >         if (bankListener != null) bankListener.accountCreated(account);
>> >         return account;
>> >     }
>> >
>> >     public void deleteAccount(long number) throws AccountNotFound {
>> >         Account account = findAccount(number);
>> >         accountsByNumber.remove(new Long(number));
>> >         if (bankListener != null) bankListener.accountDeleted(account);
>> >     }
>> > ...
>> >
>> > The code remains the same.
>> >
>> > Generating the proxy is straighforward:
>> >
>> > Bank bank = PrevaylerProxy.createInstance ( IBank.class, new Bank(),
>> > "Bank"
>> > );
>> >
>> > If you found this is useful (and if possible, of course) i would be glad
>> > to
>> > contrib with the code. :)
>> >
>> > Regards
>> >
>> > Diego
>> >
>> >
>> >
>> >
>> > --
>> > Ley de Hofstadter: Siempre toma más tiempo del que se preveía, aun
>> > cuando se
>> > tenga en cuenta la Ley de Hofstadter.
>> >
>> >
>> > ------------------------------------------------------------------------------
>> >
>> > _______________________________________________
>> > To unsubscribe go to the end of this page:
>> > http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
>> > _______________________________________________
>> > "Databases in Memoriam" -- http://www.prevayler.org
>> >
>> >
>>
>>
>> ------------------------------------------------------------------------------
>> _______________________________________________
>> To unsubscribe go to the end of this page:
>> http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
>> _______________________________________________
>> "Databases in Memoriam" -- http://www.prevayler.org
>
>
>
> --
> Ley de Hofstadter: Siempre toma más tiempo del que se preveía, aun cuando se
> tenga en cuenta la Ley de Hofstadter.
>
> ------------------------------------------------------------------------------
>
> _______________________________________________
> To unsubscribe go to the end of this page:
> http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
> _______________________________________________
> "Databases in Memoriam" -- http://www.prevayler.org
>
>

------------------------------------------------------------------------------
_______________________________________________
To unsubscribe go to the end of this page: http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
_______________________________________________
"Databases in Memoriam" -- http://www.prevayler.org