全局 JSF 异常处理程序不会捕获所有错误

Question

我实现了一个异常处理程序，如本页所述：

https://wmarkito.wordpress.com/2012/04/05/adding-global-exception-handling-using-jsf-2-x-exceptionhandler/

遗憾的是，我仍然收到一些此解决方案无法处理的错误。你知道如何捕获所有错误吗？

这不是我的处理程序发现的：

Warnung:   A system exception occurred during an invocation on EJB EmailController, method: public void com.x.tool.EmailController.sendAdminNotificationReportRegistration(com.x.JPA.Entity.User) throws java.lang.Exception
Warnung:   javax.ejb.EJBException
    at com.sun.ejb.containers.EJBContainerTransactionManager.processSystemException(EJBContainerTransactionManager.java:748)
    at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:698)
    at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:503)
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4566)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2074)
    at com.sun.ejb.containers.EjbAsyncTask.call(EjbAsyncTask.java:114)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at com.x.tool.EmailController.sendAdminNotificationReportRegistration(EmailController.java:189)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4786)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:656)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:55)
    at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:52)
    at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140)
    at sun.reflect.GeneratedMethodAccessor472.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4758)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4746)
    at com.sun.ejb.containers.EjbAsyncTask.call(EjbAsyncTask.java:101)
    ... 4 more

Answer 1

处理 JSF 请求时未抛出此异常。它是在执行异步 EJB 服务调用时抛出的。 IE。运行在与处理 JSF 请求的线程不同的线程中！

由于它是异步执行的，因此无法在返回 JSF 请求结果的响应中得到任何异常。因此，如果不删除 @Asynchronous 注释以使其同步，就不可能让它在 JSF 错误页面中结束。

无论如何，如果将它呈现到错误页面并不那么重要，但您实际上对 logging/mailing/whatever 它更感兴趣，那么您可以掌握（异步）期间抛出的任何异常使用 @AroundInvoke 拦截器的 EJB 服务调用如下：

public class ExceptionHandlerInterceptor {

    @AroundInvoke
    public Object logExceptions(InvocationContext context) throws Exception {
        try {
            return context.proceed();
        }
        catch (Exception e) {
            // Log/mail/whatever it here.

            throw e; // Don't forget to rethrow!
        }
    }

}

只需将 class 放在 EJB 项目的某处，然后通过 EJB class、

上的 @Interceptors 注释注册它

@Stateless
@Interceptors(ExceptionHandlerInterceptor.class)
public class FooService {}

或通过 /META-INF/ejb-jar.xml 中的以下条目在整个 EJB 项目范围内使用：

<interceptors>
    <interceptor>
        <interceptor-class>com.example.ExceptionHandlerInterceptor</interceptor-class>
    </interceptor>
</interceptors>
<assembly-descriptor>
    <interceptor-binding>
        <ejb-name>*</ejb-name>
        <interceptor-class>com.example.ExceptionHandlerInterceptor</interceptor-class>
    </interceptor-binding>
</assembly-descriptor>

全局 JSF 异常处理程序不会捕获所有错误

Global JSF exception handler doesn't catch all errors

jsf

exception

ejb

handler