Aspects for a businessSession

[Jeroen Budts]

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Hi,

I have almost no knowledge about Aspect Oriented Programming. However i
know you can use it to execute code before a method is called and such.

Now i have the following piece of code which i will have to use a lot:
public static List getGames() throws Exception {
BusinessSession businessSession = new BusinessSession();
try {
businessSession.open();
List games = CreateGameHelper(businessSession).getGames();

businessSession.commit();

return games;
} catch (Exception e){
businessSession.rollback();

throw e;
}
}

short explanation: I have some components (which are in fact just
facades). Every component has some (static public) methods, to interact
with the business-layer. Every method is 'one unit of work', so it must
start a businessSession, do its stuff and commit the session, or in case
of an exception do a rollback.
No i'm wondering if it would be possible to extract the businessSession
stuff from all my methods and use aspects for this?

It should be something like:
basic method in a component:
public static List getGames() throws Exception {
List games = CreateGameHelper(businessSession).getGames();
}

an aspect which is executed before a method in component:
public void executeBeforeComponentMethod() {
BusinessSession businessSession = new BusinessSession();
businessSession.open();
}

one which is executed in case of a normal result of the componentmethod:
public void successfulComponentMethod() {
businessSession.commit();
}

and one which is executed in case of an exception:
public void exceptionInComponentMethod() {
businessSession.rollback();
throw e;
}

Is such a thing somehow possible?

(I'm developing with Eclipse 3.1M6)

Thx in advance!
Jeroen Budts



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