Problems in detect an exception thrown in the render response phase using a class that specializes ExceptionHandlerWrapper

Question

I'm trying to implement a mechanism for global exception handling in JSF through specialization of the abstract classes ExceptionHandlerWrapper and ExceptionHandlerFactory. However, when an exception is thrown in the render response phase of the JSF lifecycle, it is not stacked (Phase.queueException is never called) and hence is not captured in the handle method of the class that specializes ExceptionHandlerWrapper.

The following code fragments summarize the situation where the mentioned problem occurs.

JSF:

<h:form id="formManterLider">
    <h:selectOneMenu>
        ...
        <p:ajax update=":formManterLider" listener="#{MB.atualizarListaLideresInstituicao}" />
        ...
    </h:selectOneMenu>

    <p:dataTable value="#{MB.lazyModel}" ... />
</h:form>

Java:

@ManagedBean
@ViewScoped
public class MB {
    ...
    private LazyDataModel<LiderVO> lazyModel = new LazyDataModel<LiderVO>() {
        @Override
        public List<LiderVO> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters) {
            ...
            List<LiderVO> lista = consultarLideresCandidatos(getInstituicaoSelecionada(), first, pageSize); // throws a RuntimeException
            return lista;
        }
    };
}

Changing the selection value in the h:selectOneMenu component through an AJAX request triggers the problem, because the statement update=":formManterLider" causes the method load to be invoked during the render response phase, and the method consultarLideresCandidatos, which is invoked within the load method, throws a RuntimeException.

I would like to know how to detect an exception thrown in the render response phase using a class that specializes ExceptionHandlerWrapper.

Note: I'm using Mojarra 2.1.12 and Primefaces 3.2.

Answer 1

I had exactly the same issue (LazyDataModel + exception in the render phase). Try Mojarra 2.1.16 or greater. See http://java.net/jira/browse/JAVASERVERFACES-2179