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  • ExceptionHandling with Spring 3

    - by mjf
    I have this controller: @RequestMapping(value = "*.xls", method = RequestMethod.GET) public String excel(Model model) { return "excel"; The excel wiew opens actually a ExcelViewer, which is build in method protected void buildExcelDocument(Map<String, Object> map, WritableWorkbook ww, HttpServletRequest hsr, HttpServletResponse hsr1) throws Exception { Class.writecontent Class.writeMoreContent Called methods write content to the Excel sheet and they can throw e.g biffException. How can I show a certain error page when Exception is occured? I tried this @Controller public class ExcelController { @ExceptionHandler(BiffException.class) public String handleException(BiffException ex) { return "fail"; } @RequestMapping(value = "*.xls", method = RequestMethod.GET) public String excel(Model model) { return "excel"; } } But I'm getting the server's error message about Exceptions. Maybe a bean definition missing?

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  • Error handling and polymorphism

    - by Neeraj
    I have an application with some bunch of code like this: errCode = callMainSystem(); switch (errCode){ case FailErr: error("Err corresponding to val1\n"); case IgnoreErr: error("Err corresponding to val2\n"); ... ... default: error("Unknown error\n"); } The values are enum constants. Will it make some sense to have something like: // Error* callMainSystem() ... Some code return FaileErr(); // or some other error // handling code Error* err = callMainSystem(); err->toString(); The Error class may be made singleton as it only has to print error messages. What are the pros and cons of above methods,size is an important criteria as the application needs to be supported on embedded devices as well. P.S: I don't want to use exception handling because of portability issues and associated overheads.

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  • OpenLayers: Get resolution of map in a given projection (4326)

    - by David Pfeffer
    I'm using OpenLayers to display OpenStreetMap maps. (Though, I'd assume this should be general enough to work for any map product...) I'm displaying some very sophisticated vector overlays, and the amount and resolution of the features I'm returning from the server via GeoJSON to overlay has proven too much for many computers. What I'd like to do now instead is to only send data befitting the resolution of the current zoom. This should be relatively easy to do using the getResolution and calculateBounds methods on the Map object. calculateBounds returns a Bounds object that then can be transformed between the map projection and display projection. How do I transform the resolution into my desired projection (4326 in this case)?

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  • What question(s) does an object's behavior answer?

    - by Corwin
    Reading a book I have found the following statement: (Object) Behaviors answer either of two questions: What does this object do (for me)? or What can I do to this object? In the case of an orange, it doesn’t do a whole lot, but we can do things to it. One behavior is that it can be eaten. In my understanding of object behaviour the statement above is correct regarding the first question and is incorrect in case of the second. However, I often see classes with methods like Orange::eat(), and this makes me uncertain about my design skills. So I would like to ask is it a design mistake to give oranges a behaviour eat? (oranges and eat are used just for example)

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  • Using both RolesAllowed and Transactional in beans

    - by Laran Evans
    I have some beans which contain methods which are annotated with both @RolesAllowed and @Transactional. I have one Spring config file which utilizes a BeanNameAutoProxyCreator for Security related beans and another Spring config file which utilizes a BeanNameAutoProxyCreator for Transactional related beans. The problem is that some beans contain both security as well as transactional-related beans. So Spring creates proxies for one set of beans. It then tries to create proxies for the other set of beans. When it does, it tries to create proxies of the proxies and bombs out. Has anyone tried to configure both security and transactionality in the same beans via Spring? What's the trick? Thanks.

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  • Using jQuery, how to modify text outside of tags?

    - by Jacob
    Given a string of text that is both adjacent to a span and inside of a div, what are some methods to modify just that text, leaving the surrounding HTML intact? For example: <div id="my-div">modify this text<span id="my-span"></span></div> I have tried things like $('#my-div').html(function(i, elem){blah;}); but this seems to cause the span to be deleted and a new span to be added, because some styling is lost. I realize that it would be best to wrap the text string in its own HTML tags before applying client-side code, but that is out of my control.

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  • What are the standard/practical steps required before moving to implementation of any Project/Task?

    - by jkm
    What are the standard/practical steps required before moving to implementation of any Project/Task? Hi everyone, I liked stackoverflow very much and just got registered. As I am a beginner in programming, most of the time i just implement/code my tasks directly not even thinking of creating any dfd's, flowcharts or other tools for my new classes and methods. In some interviews i was asked what process you follow and i was confused as i am not very used to follow any standards. So If some experts can help me that what steps and in what order are the best practices for solving/approaching any task in programming. And how important these are? Thanks in advance! and sorry if this question is trivial one/already asked.

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  • How to read and write UTF-8 to disk on the Android?

    - by Rob Kent
    I cannot read and write extended characters (French accented characters, for example) to a text file using the standard InputStreamReader methods shown in the Android API examples. When I read back the file using: InputStreamReader tmp = new InputStreamReader(in); BufferedReader reader = new BufferedReader(tmp); String str; while ((str = reader.readLine()) != null) { ... the string read is truncated at the extended characters instead of at the end-of-line. The second half of the string then comes on the next line. I'm assuming that I need to persist my data as UTF-8 but I cannot find any examples of that, and I'm new to Java. Can anyone provide me with an example or a link to relevant documentation?

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  • Pass parameters to a user control - asp.net

    - by Cristian Boariu
    Hi, I have this user control: <user:RatingStars runat="server" product="<%= getProductId() %>" category="<%= getCategoryId() %>"></user:RatingStars> You see that i fill the product and category by calling two methods: public string getProductId() { return productId.ToString(); } public string getCategoryId() { return categoryId.ToString(); } I do not understand why, in the user control, when i take the data received (product and category) it gives me "<%= getProductId() %" instead of giving the id received from that method... Any help would be kindly appreciated...

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  • Hibernate pluralization

    - by matiasf
    I have A MySQL database currently in production use for a CakePHP application A Java SE application accessing the same database via Hibernate, currently in development. I'm using the Netbeans "automigrate" feature to create the POJO classes and XML files (do I really need the XML files when using annotations?). As the schema is quite complex creating the tables manually is way too much work. Cake expects all DB tables to be pluralized (the Address class is automagically mapped to the addresses table). When running the Netbeans automigration it then does pluralization on the already pluralized table names (I'm getting Addresses.java and setAddresseses() methods). I know I'm asking for trouble running two very different data layers against the same database, but I'd like to know if it's possible to have Netbeans generating the POJO classes in singular form or if there is another (better) way to manage this.

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  • Embed Icons into WPF Application as Resource

    - by rattrick1
    I am trying to embed an icon into my my WPF application so that I can pull it out for use as an icon in the Window 7 JumpList using the following code: newScene.IconResourcePath = System.Reflection.Assembly.GetEntryAssembly().Location; newScene.IconResourceIndex = 0; I've gotten it to work using the following method: http://dennisdel.com/?p=38 However, it doesn't seem like the best approach and it seems like there should be an easier way to embed an icon resource into my application while still leaving the "Icon and Manifest" option checked in the Application properties for my program. I've tried numerous methods including setting the icon build action as a resource and an embedded resource, but every time I open my .exe in a resource editor, the icon does not appear. Any suggestions?

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  • Delegation, is this just opinionated or is there a common pattern?

    - by user1446714
    If I have a java class containing substantial code and I wish to add extra features, am I right in thinking the delegate class would have the additional features added as methods. Then my original class would create the delegate object and just call the extra functionality via the delegate instance? I am being told by somebody else that my original class should become the delegate and that the class containing the new functionality should contain an instance of the original class, to use as a delegate? This seemed a little backward to me, because there would be far more delegate calls because most of the code is now in the delegate.... I was always under the impression the delegate object would contain the additional new behaviour and an instance of it would be in the original class to inboke the new behaviour from?

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  • C# Fake Enum TypeInitializationException

    - by userk
    I'm trying to create a class that works as a flexible enum. I came with this idea, with 2 additional static methods that allow me to add new members to that list and get only members from that list. public class LikeEnum { private static List<LikeEnum> list = new List<LikeEnum>() { new LikeEnum("One"), new LikeEnum("Two") }; private string value; private LikeEnum(string value) { this.value = value; } } Unfortunately the List list is only initialized as null so this doesn't work... Any ideas or suggestions?

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  • Python unittest with expensive setup

    - by Staale
    My test file is basically: class Test(unittest.TestCase): def testOk(): pass if __name__ == "__main__": expensiveSetup() try: unittest.main() finally: cleanUp() However, I do wish to run my test through Netbeans testing tools, and to do that I need unittests that don't rely on an environment setup done in main. Looking at http://stackoverflow.com/questions/402483/caching-result-of-setup-using-python-unittest - it recommends using Nose. However, I don't think Netbeans supports this. I didn't find any information indicating that it does. Additionally, I am the only one here actually writing tests, so I don't want to introduce additional dependencies for the other 2 developers unless they are needed. How can I do the setup and cleanup once for all the tests in my TestSuite? The expensive setup here is creating some files with dummy data, as well as setting up and tearing down a simple xml-rpc server. I also have 2 test classes, one testing locally and one testing all methods over xml-rpc.

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  • Performselector not call in NSThread

    - by abdulsamad
    Hi all, I have a problem that i want to call a function when one of my functions that is running into a seperate thread comes to an end. its like that [NSThread detachNewThreadSelector:@selector(fetchFeaturedFreeApps) toTarget:self withObject:nil]; here is my fetchFeaturedFreeApps function -(void)fetchFeaturedFreeApps { ////all my code [self performSelector:@selector(closeView) withObject:nil afterDelay:4.0]; } My problem is that the close view methods doesnt run after the 4 seconds. Hoew if i call the fetchFeaturedFreeApps method with perform selector then my closeview metod is called properly. Your valuable help is highly appreciated.

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  • Unit testing with serialization mock objects in C++

    - by lhumongous
    Greetings, I'm fairly new to TDD and ran across a unit test that I'm not entirely sure how to address. Basically, I'm testing a couple of legacy class methods which read/write a binary stream to a file. The class functions take a serializable object as a parameter, which handles the actual reading/writing to the file. For testing this, I was thinking that I would need a serialization mock object that I would pass to this function. My initial thought was to have the mock object hold onto a (char*) which would dynamically allocate memory and memcpy the data. However, it seems like the mock object might be doing too much work, and might be beyond the scope of this particular test. Is my initial approach correct, or can anyone think of another way of correctly testing this? Thanks!

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  • How to call same method for a list of objects?

    - by Dmitry
    Suppose code like this: class Base: def start(self): pass def stop(self) pass class A(Base): def start(self): ... do something for A def stop(self) .... do something for A class B(Base): def start(self): def stop(self): a1 = A(); a2 = A() b1 = B(); b2 = B() all = [a1, b1, b2, a2,.....] Now I want to call methods start and stop (maybe also others) for each object in the list all. Is there any elegant way for doing this except of writing a bunch of functions like def start_all(all): for item in all: item.start() def stop_all(all): .....

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  • Is it possible to use the ScalaTest BDD syntax in a JUnit environment?

    - by ebruchez
    I would like to describe tests in BDD style e.g. with FlatSpec but keep JUnit as a test runner. The ScalaTest Quick Start does not seem to show any example of this: http://www.scalatest.org/getting_started_with_junit_4 I first tried naively to write tests within @Test methods, but that doesn't work and the assertion is never tested: @Test def foobarBDDStyle { "The first name control" must "be valid" in { assert(isValid("name·1")) } // etc. } Is there any way to achieve this? It would be even better if regular tests can be mixed and matched with BDD-style tests.

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  • Weird <T> Activator Question.

    - by j-t-s
    Hello, I'm sorry, but a while ago I wrote a piece of code that was so nice. And now I'm trying to remember it for a new project. All I can remember about it is that it looked something like this: public static Create<T>() *something missing here* : *Something missing here* { // add methods etc here. I also think I remember something like " Activator.CreateInstance" being used. But I'm not sure. } Has anybody written code like this before? Basically what it did was it created a control and passed it back to another project. Thank you jt

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  • C# Events and Lambdas, alternative to null check?

    - by Eugarps
    Does anybody see any drawbacks? It should be noted that you can't remove anonymous methods from an event delegate list, I'm aware of that (actually that was the conceptual motivation for this). The goal here is an alternative to: if (onFoo != null) onFoo.Invoke(this, null); And the code: public delegate void FooDelegate(object sender, EventArgs e); public class EventTest { public EventTest() { onFoo += (p,q) => { }; } public FireFoo() { onFoo.Invoke(this, null); } public event FooDelegate onFoo; }

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  • How to pass or display mySQL data based on subscription or billing

    - by spm
    I want to build a PHP based site where, the user can view data based on the types of data they've paid for. Allow me to use something simple for an example. Let's say historical data for basketball was not readily available but could be purchased. Simple information such as the Winner, Loser, Final score and date are all stored in a mySQL table. What would be involved so that, when the user logs in, they can only see the historical data they have paid for. My theories so far about the architecture: I imagined a mySQL table storing True or False values for all historical game data they have paid for. Based on this, a 'data chart' object enables the user to view all data within their mySQL row which has a value of 'true.' Follow ups: Assuming I am correct, what methods are popular or practical for this type of service.

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  • Coldfusion CFC creation taking a variable amout of time to execute.

    - by Bazza
    I've been doing some logging of object creation times in our open account process in production. Periodically, initializing an object would take way longer than expected. By initializing I mean calling it's init() and passing a couple of arguments that may be simple variables or objects. e.g. <cfset validateObj = createObject("component", "compExample").init( productionMode = VARIABLES.productionMode, ipWhiteListed = isWhiteListed, ipLocatorObj = VARIABLES.ipLocatorObj ) /> Thats all that happens in init() methods. Generally the execution time would be 0ms, but at random times I might get 3 or 3.5 seconds. This is not specific to one particular server or to our generally busy period. It appears to be quite random. One thought was that these templates were being evicted from our template cache as they are not especially frequently used, although I checked cfstat on a number of servers and the max CP/Sec is -1. Running CF 8,0,1 Has anybody else ever come across this?

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  • How can I sync three classes?

    - by TheMachineCharmer
    class Foo { Bar b; List<Foo> Neighbours; } class Bar { Spam s; List<Bar> Neighbours; } class Spam { List<string> Neighbours; } Each of these classes have AddNeighbour,RemoveNeighbour methods. User can add/remove Neighbours from any of the class at random. I want these three objects to be in sync. How can I do this?

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  • Automatic User Authentication Framework for Controllers in ASP.NET MVC?

    - by Austin
    In rails I could do something like this to make sure a user is authenticated before accessing an action in the controller: before_filter :checked_logged_in, :only => [:edit, :update] I was wondering if ASP.NET MVC had something similar or if there was a framework out there that could essentially do something like the following: For certain methods with actions that take a certain parameter, I want to point the action to a method, check to see if the user owns that object, and if so, proceed to the controller action. If not, I want to redirect him to another action where I can show him he has invalid credentials. So basically I am looking for a sort of "before_filter." Anyone know of anything out there that can do this? Thanks!

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  • Using external javascript files with asp.net MVC

    - by twal
    I have some javascript inwhich I am using such helpers as var url = <%=ResolveUrl("~/controller/action") %> When the javascript is embeded in the .aspx page using the <script> tag everything works fine When I move it out to an external file those scripts that have the helper methods do not work. Other scripts do just the ones with the var url = <%=ResolveUrl("~/controller/action") %> do not. Are these not possible to use in external javascript files?? I would like to get all of my javascript out of the aspx files if I can. thanks!

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