Re: Prevayler Facade

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.
> >
> >
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> >
> >
>
>
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>



-- 
Ley de Hofstadter: Siempre toma más tiempo del que se preveía, aun cuando se
tenga en cuenta la Ley de Hofstadter.

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