c:forEach.items getting repetitively called

Question

Environment: Seam, Richfaces

The following code snippet causes the method getUsers to be called multiple times, how do I avoid this in my application so that it gets called only once.

<c:forEach items="#{userHome.getUsers()}" var="_user">
</c:forEach>

Answer 1

A rule of thumb is to avoid <c: tags when using JSF (unless you are sure they work as expected)

Here you'd better repllace it with:

<a4j:repeat value="#{userHome.users}" var ="_user">
</a4j:repeat>

(or <ui:repeat> if using facelets)

P.S. I guess getUsers() is JBoss' EL-extension, but I'd suggest not to use its extended features unless really needed.

Answer 2

And for the love of god, if you care about performance avoid using the EntityHome/Query framework. Just put a breakpoint or output on your getResultList() and see how many times it is being called. Now try the same think with a normal seam component. You will see a significant change(!)