是否有方法将Springs @ExceptionHandler与Joinfaces集成

Question

我想问一下，是否有一种方法可以启用Springs /Primefaces的@ExceptionHandler功能。

目前，我能够处理全局@ControllerAdvice bean，但如果@ExceptionHandler在@Controller类中，则不能处理。

对于如何解决这个问题，有什么建议吗？

这是我迄今所写的代码

@Slf4j
public class SpringJsfExceptionHandler extends ExceptionHandlerWrapper {

    public SpringJsfExceptionHandler(ExceptionHandler wrapped) {
        super(wrapped);
    }

    @Override
    public void handle() throws FacesException {
        final Iterator<ExceptionQueuedEvent> queue = getUnhandledExceptionQueuedEvents().iterator();

        while (queue.hasNext()) {
            ExceptionQueuedEvent item = queue.next();
            ExceptionQueuedEventContext exceptionQueuedEventContext = (ExceptionQueuedEventContext) item.getSource();

            try {
                Throwable throwable = exceptionQueuedEventContext.getException();

                FacesContext context = FacesContext.getCurrentInstance();

                handleException(context, (Exception) throwable);

            } finally {
                queue.remove();
            }
        }
    }

    private void handleException(FacesContext context, Exception throwable) {
        WebApplicationContext applicationContext = resolveApplicationContext(context);

        Collection<HandlerExceptionResolver> exceptionResolvers = listExceptionHandlerResolvers(applicationContext);

        for (HandlerExceptionResolver resolver : exceptionResolvers) {
            resolver.resolveException(request(context), response(context), null, throwable);
        }
    }

    private Collection<HandlerExceptionResolver> listExceptionHandlerResolvers(WebApplicationContext context) {
        return context.getBeansOfType(HandlerExceptionResolver.class).values();
    }

    private HttpServletRequest request(FacesContext context) {
        return (HttpServletRequest) context.getExternalContext().getRequest();
    }

    private HttpServletResponse response(FacesContext context) {
        return (HttpServletResponse) context.getExternalContext().getResponse();
    }

    private WebApplicationContext resolveApplicationContext(FacesContext context) {
        HttpServletRequest request = (HttpServletRequest) context.getExternalContext().getRequest();
        return WebApplicationContextUtils.findWebApplicationContext(request.getServletContext());
    }

}

public class SpringJsfExceptionHandlerFactory extends ExceptionHandlerFactory {

    public SpringJsfExceptionHandlerFactory() {
    }

    public SpringJsfExceptionHandlerFactory(ExceptionHandlerFactory wrapped) {
        super(wrapped);
    }

    @Override
    public ExceptionHandler getExceptionHandler() {
        return new SpringJsfExceptionHandler(getWrapped() != null ? getWrapped().getExceptionHandler() : null);
    }
}

这样做是可行的：

@ControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler
    public void handleCalculationException(CalculationException e) {
        FacesContext.getCurrentInstance().
                addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, e.getMessage(), e.getMessage()));
    }
}

这样做是行不通的：

@Data
@Controller
@ViewScoped
public class CalculatorController implements Serializable {

    @ExceptionHandler
    public void handleCalculationException(CalculationException e) {
        FacesContext.getCurrentInstance().
                addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, e.getMessage(), e.getMessage()));
    }
[...]

提前感谢

Answer 1

TLDR:否

@ExceptionHandler是Spring的一部分。

Spring和JSF是独立的web框架。

Joinfaces允许您在Spring应用程序中使用JSF，也可以在同一个应用程序中使用Spring。但是，每个请求都将由Spring (即DispatcherServlet)或JSF (即FacesServlet)处理。