I am trying to define a custom renderable exception exactly as shown in the documentation example but when I throw my custom exception, the render and report functions inside the exception class are totally ignored.
I am aware that I can handle my custom exceptions inside the exception handler but this is something I would prefer to do inside the exception class.
Is it something more that I should do to register the exception in order for the render and report functions to be called? What am I missing?
Thank you!
EDIT: I'm using Lumen 5.7.
Turns out that this feature is not available in Lumen framework, only in Laravel. Lumen's documentation is very misleading as it lets one to imagine that the features concerning errors are common in Laravel and Lumen.
In any case, currently in Lumen only exception handling inside the exception handler is available.
Looks like it feature will be added in one of next 5.8.* releases.
PR: https://github.com/laravel/lumen-framework/pull/958
Related
I'm using Kotlin and SpringBoot 2.3. While testing I realized that #ExceptionHandler(MissingKotlinParameterException::class) in my controller doesn't work if I have an generic handler for uncaught exceptions with #ExceptionHandler(Exception::class).
The exception always bubbles to generic exception handler. It's not the case with other exceptions like IllegalArgumentsException which the correct handler handles.
Anyone knows what am I missing?
Thanks
Use
#ExceptionHandler(HttpMessageNotReadableException::class)
instead of
#ExceptionHandler(MissingKotlinParameterException::class)
I had the same issue but with this above I solved the problem.
It is something to do with wrapper.
I recently change to Spring-boot for development. Can anyone help me to understand better in Spring?
In laravel, there is dd() function, which is useful to dump variable value. The picture below show the result of dd(). Can I achieve same thing in Spring?
There is no such behavior, but you can make it similar.
Create an exception and include the result data you want to see.
Register the exception in the #ExceptionHandler.
If you want to be global, create an #ExceptionHandler in #ControllerAdvice.
I am creating a Spring Boot web application, but i am confused why people use Global Exception handlers(#ControllerAdvice) when there is Error Page Registrar which is neater and more explicit. Please can someone explain more and is it possible to call an Error page registrar from a global Exception Handler Class( class annoted with #ControllerAdvice, with an #Exceptionhandler method).
As Brian answer, I think you can do this. I got a sample to prove this one in here if you still need to refer: https://github.com/kennytai/SampleSpringbootExceptionHandler
At this sample, I use the #ControllerAdvice in class GlobalExceptionHandler to manage all exceptions from TestController.
Hope this help.
It's actually the opposite the error pages mechanism in Spring Boot is the global one; it's catching all exceptions unhandled by the application. Note that in a Servlet environment, it's even dispatching the request back into the container on the /error path.
You're right though, this mechanism is really powerful and you can achieve a lot with it.
The other exception handling mechanisms you're mentioning are provided by Spring MVC itself. They're executed during the handling of the request and don't require an additional dispatch to the container. In some cases, they can be more limited because they offer less features than the full ErrorController (which is an MVC Controller).
But unlike error pages, you can configure those to focus on only specific errors:
You can declare an #ExceptionHandler within a Controller and specify the type of Exception you'd like to handle
You can configure the #ControllerAdvice annotation to only apply to specific packages, Controllers extending a specific interface or annotated with a specific annotation
I'd say the latter are quite useful when you want to deal with business exceptions at the controller level. You can do that with error pages, but you might end up with a single error controller dealing with too many things.
I have done some research around this with conflicting results. To handle this error, some say that I need to implement HandlerExceptionResolver in one of my controllers.
Here are some links for that:
How to handle MaxUploadSizeExceededException
Handling MaxUploadSizeExceededException with Spring MVC
http://www.raistudies.com/spring/spring-mvc/file-upload-spring-mvc-annotation/
On the other hand, other people are saying that this approach is futile such that the Exception is occuring outside the request handling flow:
http://forum.spring.io/forum/spring-projects/web/124409-handling-maxuploadsizeexceededexception-in-spring (The second poster in the thread)
MaxUploadSizeExceededException doesn't invoke the exception handling method in Spring
I have tried the above solutions but they do not work for me. It appears that the Exception occurs outside of Spring, as expected. I am unable to catch this even with HandlerExceptionResolver.
Trying following the approach specified in the link below. Basically, you configure an error page for any un handled exception and then define a handler for the error page. Looks like a decent workaround.
Here is the link http://www.javacodegeeks.com/2013/11/how-to-custom-error-pages-in-tomcat-with-spring-mvc.html
Hope this helps.
I am trying to show an custom error message on any occurrence of exception or error in my business layer. I am catching the exception in my controller and I would like to display it in my JSP.
This exception or error is not associated with any field in the screen, it's a pure server exception. I am also using an Annotated Controller. I am using Prototype for making AJAX requests to my controller.
In Spring you can register a HandlerExceptionResolver which will catch exceptions thrown by your Spring MVC controllers and forward them to the view layer for rendering. These are described in the Spring docs here. Start with the SimpleMappingExceptionResolver (see javadoc) which gives a simple mechanism for mapping exception types to views.
However, if the exception occurs outside if your Spring controller, for whatever reason, then you'll need a more generic fall-back solution, which involves configuring error pages in your web.xml file. This is not Spring-specific. See here for an example of how to do it.