grails - 如何实现全局后端异常处理程序

Question

我有grails申请。

我想实现全局grails后端异常处理程序。

意味着如果后端的应用程序中有任何异常(例如NullPointer，ArrayIndexOutOfBounds)或引发了任何其他异常，则应执行一些代码。我们如何在grails 2.4.4中做到这一点。

Answer 1

您可以使用UrlMappings处理它。
来自documentation

static mappings = {
"403"(view: "/errors/forbidden")
"404"(view: "/errors/notFound")
"500"(controller: "errors", action: "illegalArgument",
     exception: IllegalArgumentException)
"500"(controller: "errors", action: "nullPointer",
     exception: NullPointerException)
"500"(controller: "errors", action: "customException",
     exception: MyException)
"500"(view: "/errors/serverError")
}

With this configuration, an IllegalArgumentException will be handled by the illegalArgument action in ErrorsController, a NullPointerException will be handled by the nullPointer action, and a MyException will be handled by the customException action. Other exceptions will be handled by the catch-all rule and use the /errors/serverError view.