JSF 1.x generic exception handling

Question

If I have an exception in my business layer (e.g. a SQL exception in my JDBC connection bean), how can I propagate it with a custom message to a global error.jsp pa

Answer 1

I made ​​an error page in the site faces and put the stacktrace of the error This code first put it in the web.xml

                500
                /errorpage.jsf

While the jsf page had this code

    
    





    

      
 PLAN SEGURO
    
    

    

      
      Error de ejecución
      
    
    

    
Ocurrio un error al realizar la operación, favor de intentarlo nuevamente, si el error aún se presenta, favor de notificarlo a soporte técnico al 5147-31-00 extensión 6893
    
    

      

    


    
        
    

Note that motif lets you debug the stacktrace for an reazon know which is the exception in the hidden field. Let's see how the class is defined recovers StackTrace

public class ErrorDisplay implements Serializable{

    private static final long serialVersionUID = 6032693999191928654L;
    public static Logger LOG=Logger.getLogger(ErrorDisplay.class);

    public String getContacto() {
        return "";
    }

    public String getStackTrace() {
        FacesContext context = FacesContext.getCurrentInstance();
        Map requestMap = context.getExternalContext().getRequestMap();
        Throwable ex = (Throwable) requestMap.get("javax.servlet.error.exception");

        StringWriter writer = new StringWriter();
        PrintWriter pw = new PrintWriter(writer);
        fillStackTrace(ex, pw);
        LOG.fatal(writer.toString());

        return writer.toString();
    }

    private void fillStackTrace(Throwable ex, PrintWriter pw) {
        if (null == ex) {
            return;
        }

        ex.printStackTrace(pw);

        if (ex instanceof ServletException) {
            Throwable cause = ((ServletException) ex).getRootCause();

            if (null != cause) {
                pw.println("Root Cause:");
                fillStackTrace(cause, pw);
            }
        } else {
            Throwable cause = ex.getCause();

            if (null != cause) {
                pw.println("Cause:");
                fillStackTrace(cause, pw);
            }
        }
    }
}

and already attached as you finish this bean definition in the file facesconfig

            
                Bean que sirve para llenar la especificacion de un error. Stacktrace 
            
            errorDisplay
            mx.com.tdc.datos.page.bean.ErrorDisplay
            session
        

And I hope that this will serve