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POSpring MVC exception handling with HandlerExceptionResolver
 

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    <p>I am currently trying to use <code>HandlerExceptionResolver</code> for exception handling in a Spring MVC project. </p> <p>I want to handle normal exceptions via <code>resolveException</code> as well as 404's via <code>handleNoSuchRequestHandlingMethod</code>.</p> <p>Depending on the request type JSON or text/html the exception response should be returned appropriately.</p> <p><code>resolveException</code> works now.</p> <p>But <code>handleNoSuchRequestHandlingMethod</code> is giving me a headache. It's never called!</p> <p>According to the docu the method should be called on 404 errors</p> <p><a href="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolver.html" rel="nofollow">http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolver.html</a></p> <p>What am I doing wrong...</p> <p>This is what I have so far.</p> <pre><code>public class JsonExceptionResolver implements HandlerExceptionResolver { protected final Log logger = LogFactory.getLog(getClass()); public ModelAndView resolveException(HttpServletRequest request, if (exception instanceof NoSuchRequestHandlingMethodException) { return handleNoSuchRequestHandlingMethod((NoSuchRequestHandlingMethodException) exception, request, response, handler); } ... } public ModelAndView handleNoSuchRequestHandlingMethod(NoSuchRequestHandlingMethodException ex, HttpServletRequest request, HttpServletResponse response, Object handler){ logger.info("Handle my exception!!!"); ModelAndView mav = new ModelAndView(); boolean isJSON = request.getHeader("Accept").equals("application/json"); if(isJSON){ ... }else{ .. } return mav; } } </code></pre> <p><strong>EDIT with DefaultHandlerExceptionResolver</strong>:</p> <pre><code>public class MyExceptionResolver extends DefaultHandlerExceptionResolver { protected final Log logger = LogFactory.getLog(getClass()); @Override protected ModelAndView doResolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception exception) { logger.warn("An Exception has occured in the application", exception); logger.info("exception thrown " + exception.getMessage() ); if (exception instanceof NoSuchRequestHandlingMethodException) { return handleNoSuchRequestHandlingMethod((NoSuchRequestHandlingMethodException) exception, request, response, handler); } ... return mav; } public ModelAndView handleNoSuchRequestHandlingMethod(NoSuchRequestHandlingMethodException ex, HttpServletRequest request, HttpServletResponse response, Object handler){ logger.info("Handle my exception!!!"); ModelAndView mav = new ModelAndView(); boolean isJSON = request.getHeader("Accept").equals("application/json"); if(isJSON){ ... }else{ ... } return mav; } } </code></pre> <p>The above code still has no effect.</p> <p>Any other ideas?</p>
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