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  • Spring 3 Controller Exception handler implementation problems

    - by predhme
    I was hoping to implement a single "ExceptionController" to handle exceptions that are thrown in execution of my other controllers' methods. I hadn't specified any HandlerExceptionResolver in my application context so according to the API documentation the AnnotationMethodHandlerExceptionResolver should be started. Verified as such in the source. So I am curious to know why the following isn't working. @Controller public class ExceptionController { @ExceptionHandler(NullPointerException.class) public ModelAndView handleNullPointerException(NullPointerException ex) { // Do some stuff log.error(logging stuff) return myModelAndView; } } @Controller public class AnotherController { @RequestMapping(value="/nullpointerpath") public String throwNullPointer() { throw new NullPointerException(); } } I see in the debug logs that the three default exception handlers are asked for handling of the exception, but nothing is done and I see "DispatcherServlet - Could not complete request". Followed by the user being displayed the stacktrace and a 500 Internal error.

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  • Spring MVC Controller redirect using URL parameters instead of in response.

    - by predhme
    I am trying to implement RESTful urls in my Spring MVC application. All is well except for handling form submissions. I need to redirect either back to the original form or to a "success" page. @Controller @RequestMapping("/form") public class MyController { @RequestMapping(method = RequestMethod.GET) public String setupForm() { // do my stuff return "myform"; } @RequestMapping(method = RequestMethod.POST) public String processForm(ModelMap model) { // process form data model.addAttribute("notification", "Successfully did it!"); return "redirect:/form"; } } However as I read in the Spring documentation, if you redirect any parameters will be put into the url. And that doesn't work for me. What would be the most graceful way around this?

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  • How do I implement a listener pattern over RMI using Spring?

    - by predhme
    So here is a generalized version of our application desgin: @Controller public class MyController { @Autowired private MyServiceInterface myServiceInterface; @RequestMapping("/myURL") public @ResponseBody String doSomething() { MyListenerInterface listener = new MyListenerInterfaceImpl(); myServiceInterface.doThenCallListener(listener); // do post stuff } } public interface MyListenerInterface { public void callA(); public void callB(); } public class MyListenerInterfaceImpl implements MyListenerInterface { // ... omitted for clarity } public interface MyServiceInterface { public void doThenCallListener(MyListenerInterface listener); } public class MyServiceImpl { public void doThenCallListener(MyListenerInterface listener) { // do stuff listener.callA(); } } Basically I have a controller that is being called via AJAX in which I am looking to return a response as a string. However, I need to make a call to the backend (MyServiceInterface). That guy is exposed through RMI by using Spring (man that was easy). But the service method as described requires a listener to be registered for invokation completion purposes. So what I assume I need to achieve is transparently to the backend make it so that when the listener methods are called, really the call is going over RMI. I would have thought Spring would have a simple way to wrap a POJO (not a service singleton) with RMI calls. I looked through their documentation but they had nothing besides exposing services via RMI. Could someone point me in the right direction?

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  • What's wrong with my object tag to embed a Java Applet?

    - by predhme
    Here is my object tag. <object classid="java:my.full.class.Name.class" height="360" width="320"> <param name="type" value="application/x-java-applet"> <param name="archive" value="applets.jar"> <param name="file" value="/report_files/1-1272041330710YAIwK"> <param name="codebase" value="/applets"> </object> When I run this in firefox it just shows up with an Error, click for details. The java console shows absolutely nothing. And at the bottom of fire fox is says "Applet my.full.class.Name notloaded". The Name.class file is in the applets.jar file. I can type the URL /applets/applets.jar and access the jar file. So whats wrong? EDIT: I can access the param file as well, although I don't believe that is the issue. EDIT: I updated the tag because I noticed in my HTML logs it wasn't looking in the right place. Still nothing though

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  • Are there any new/updated Java web development frameworks to watch for?

    - by predhme
    I know recently Spring 3.0 was released which brought about a nice new set of features and ease of web development with their MVC package. However are there any new frameworks on the horizon and/or new versions of other frameworks that a web developer should have their eyes on? I heard about the Stripes framework, but it seems as though development has stopped. It also seems grails has a new release coming out as well which that looks like it is just an update to support the new features in the latest groovy release.

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  • How to explictely obtain post data in Spring MVC?

    - by predhme
    Is there a way to obtain the post data itself? I know spring handles binding post data to java objects. But if I had two fields that I want to process manually, how do I obtain that data? Assuming I had two fields in my form <input type="text" name="value1" id="value1"/> <input type="text" name="value2" id="value2"/> How would I go about retrieving those values in my controller?

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  • Why is hibernate returning a proxy object?

    - by predhme
    I have a service method that returns an object from the database. This method is called from numerous parts of the system. However, one particular method is getting a return type of ObjectClass_$$_javassist_somenumber as the type. Which is throwing things off. I call the service method exactly the same as everywhere else, so why would hibernate return the proxy as opposed to the natural object? I know there are ways to expose the "proxied" object, but I don't feel like I should have to do that. The query is simply hibernateTemplate.find("from User u where u.username = ?", username)

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  • How do I bind HTML table data to a java object in a spring controller?

    - by predhme
    I have a spring MVC application using JSP as my view technologies with Jquery for AJAX. I have a table such as the following: <table> <tr> <td>name1</td> <td>value1</td> <td>setting1</td> </tr> <tr> <td>name2</td> <td>value2</td> <td>setting2</td> </tr> </table> I need to serialize this table so that it can later be bound to an object in my controller. However the jquery serialize() method only works on form fields. What would be the best approach to get the table data into the HTTP request so that I can later bind it to a java object?

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  • Does Spring MVC form submit data bind children objects automagically?

    - by predhme
    I have a data model that is something like this: public class Report { // report owner private User user; ... typical getter setter ... } public class User { ... omitted for clarity } What happens is when a report is created, the current user is set to the report user object. When the report is edited, the spring controller handling the POST request is receiving a report where the user object is null. Here is what my controller looks like: @Controller @RequestMapping("/report") public class ReportController { @RequestMapping(value = "/edit/{id}", method = RequestMethod.GET) public String editReport(@PathVariable Long id, Model model) { Report r = backend.getReport(id); // fully loads object model.addAttribute("report", report); return "report/edit"; } @RequestMapping(value = "/edit/{id}", method = RequestMethod.POST) public String process(@ModelAttribute("report") Report r) { backend.save(r); return "redirect:/report/show" + r.getId(); } } I ran things throw the debugger and it looks like in the editReport method the model object is storing the fully loaded report object (I can see the user inside the report). On the form jsp I can do the following: ${report.user.username} and the correct result is rendered. However, when I look at the debugger in the process method, the passed in Report r has a null user. I don't need to do any special data binding to ensure that information is retained do I?

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  • Using jQuery, how do I way attach a string array as a http parameter to a http request?

    - by predhme
    I have a spring controller with a request mapping as follows @RequestMapping("/downloadSelected") public void downloadSelected(@RequestParam String[] ids) { // retrieve the file and write it to the http response outputstream } I have an html table of objects which for every row has a checkbox with the id of the object as the value. When they submit, I have a jQuery callback to serialize all ids. I want to stick those ids into an http request parameter called, "ids" so that I can grab them easily. I figured I could do the following var ids = $("#downloadall").serializeArray(); Then I would need to take each of the ids and add them to a request param called ids. But is there a "standard" way to do this? Like using jQuery?

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