jsf - How to use FullAjaxExceptionHandler with Spring Boot error page declarations?

Question

How can we do when use onmifaces in the case of spring boot apps?, where the error pages declaration is made at EmbeddedServletContainerCustomizer class?

@Override
public void customize(ConfigurableEmbeddedServletContainer container) {
    MimeMappings mappings = new MimeMappings(MimeMappings.DEFAULT);

    mappings.add("eot", "application/vnd.ms-fontobject");
    mappings.add("ttf", "application/x-font-ttf");
    mappings.add("woff", "application/x-font-woff");
    mappings.add("woff2", "application/x-font-woff2");

    container.setMimeMappings(mappings);

    container.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/error.xhtml"));
    container.addErrorPages(new ErrorPage(FaceletException.class, "/error.xhtml"));
    container.addErrorPages(new ErrorPage(Throwable.class, "/error.xhtml"));
}

I have analized findErrorPageLocation and it uses WebXml that parses web.xml files.

Answer 1

The Servlet API in its current version does not support programmatically defining and obtaining error pages. That's why OmniFaces had to manually parse web.xml.

OmniFaces does not and will not support Spring specific APIs. I recommend to just keep using web.xml for error page configuration so that non-Spring libraries will be able to share them.