[jboss-user] [JBoss Seam] - Re: Bijection clarification

[monkeyden]

The most basic description is that @In and @Out just replaces the glue code you have to write to get things out of some context (Session, Request, Application and, in Seam, Conversation scopes).  Rather than having:

String param = request.getSession().get("param");

you have:

@In(scope=ScopeType.SESSION)
String param;

Be careful though.  I realized (sort of late) that bijection apparently happens for value-binding method calls too, so if you're injection a lot, you will pay a price in RENDER_RESPONSE.  In our case, we had a huge form with many validation error messages from the resource bundle.

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