4 Replies Latest reply on Oct 20, 2014 6:42 AM by noelmd

    RESTEasy service and ExceptionMapper

    arteme
    arteme Jun 21, 2014 2:47 PM

      Dear SwitchYard community,

       

      I have a problem (yet again). I have a SwitchYard 1.1 application with multiple HTTP and REST services. I'm looking for a way to add custom error messages (in case of error 404, 500 and such). My services talk JSON and are expected to return a JSON reply no matter, what circumstances are.

       

      I would be content if I could just set the HTTP response body and status code myself in all circumstances and JBoss AS would just pass it to the client as-is. I fail completely at getting this kind of behavior from JBoss

       

      I know, with RESTEasy there are exception mappers that can be used, but I cannot seem to get my exception mappers registered.

       

      I have the following exception mapper:

       

      @Provider
public class CustomExceptionMapper implements ExceptionMapper<Exception> {

    @Override
    public Response toResponse(Exception e) {

        String body = "{}";

        return Response.serverError()
                .entity(body).type(MediaType.APPLICATION_JSON_TYPE)
                .build();
    }
}

      and I have the following web.xml:

       

      <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"  version="3.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <context-param>
        <param-name>resteasy.providers</param-name>
        <param-value>ru.swisstok.esb.util.rest.CustomExceptionMapper</param-value>
    </context-param>
    <context-param>
        <param-name>resteasy.scan</param-name>
        <param-value>true</param-value>
    </context-param>
</web-app>

      Strictly speaking, I shouldn't need to add any context params to the web.xml file as on JBoss AS the application should be scan for RESTEasy annotations automatically. That is not happening.

       

      I try to register the provider directly by supplying the "resteasy.providers" context-param and it is not being picked up either.

       

      In fact, I don't know why my web.xml is no used at all. I break at org.jboss.resteasy.server.servlet.ConfigurationBootstrap#createDeployment() and see that getParameter() calls dealing with context parameters above don't return anything. In fact both getParameterNames() and getInitParameterNames() return empty lists. Why? How? I have a WAR that has /WEB-INF/web.xml as described above. I know it is parsed because if the XML is malformed, deployment fails with errors.

       

      I have tried different things, but to no avail. Is there any hope for me?