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  • What is the best design to this class?

    - by HPT
    assume this class: public class Logger { static TextWriter fs = null; public Logger(string path) { fs = File.CreateText(path); } public static void Log(Exception ex) { ///do logging } public static void Log(string text) { ///do logging } } and I have to use this like: Logger log = new Logger(path); and then use Logger.Log() to log what I want. the question is: is this a good design? to instantiate a class and then always call it's static method? any suggestion yield in better design is appreciated.

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  • Help with Magento and related products

    - by Anthony
    I have a customer product page that literally lives beside the catalog/product/view.phtml page. It's basically identical to that page with a few small exceptions. It's basically a 'product of the day' type page so I can't combine it with the regular product page since I have to fetch the data from the DB and perform a load to get the product information $_product = Mage::getModel('catalog/product')->load($row['productid']); To make a long story short, everything works (including all children html blocks) with the singular exception of the related products. After the load I save the product into the registry with Mage::register('product', $_product); and then attempt to load the related products with: echo $this->getLayout()->createBlock('catalog/product_view')->setTemplate('catalog/product/list/related.phtml')->toHtml();` All of which give back the error: Fatal error: Call to a member function getSize() on a non-object in catalog/product/list/related.phtml on line 29`, and line 29 is <?php if($this->getItems()->getSize()): ?>`. Any help getting the relateds to load would be appreicated.

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  • data parameter is nil error when checking internet connectivity

    - by JSA986
    When launching my app it checks if user is subscribed. If it dosent detect an internet connection it crashes with the error: Failed to retrieve subscription with error 'The Internet connection appears to be offline.' and responseString: (null)*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'data parameter is nil' .m [self getPath:path parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) { if (![responseObject isKindOfClass:[NSDictionary class]]) { failureBlock(@"Invalid response received"); return; } NSDictionary *subscriptionDict = (NSDictionary *)responseObject; if (subscriptionDict[@"error"] == nil) { DebugLog(@"Successfully retrieved subscription"); successBlock(subscriptionDict); } else { failureBlock(responseObject); } } failure:^(AFHTTPRequestOperation *operation, NSError *error) { DebugLog(@"Failed to retrieve subscription with error '%@' and responseString: %@", error.localizedDescription, operation.responseString); id responseObject = [NSJSONSerialization JSONObjectWithData:operation.responseData options:0 error:nil]; failureBlock(responseObject); }]; }

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  • How to check if a pointer is null in C++ Visual 2010

    - by mariomario
    I am having problems here if I want to check if eerste points to nothing i get Blockquote Unhandled exception at 0x003921c6 in Bank.exe: 0xC0000005: Access violation reading location 0xccccccd0. and i am kinda wondering why he justs skips the if statement or doens't stop when the object eerste points to nothing Bank::Bank() { LijstElement *eerste = NULL; LijstElement *laatste = NULL; } Rekening * Bank::getRekening(int rekNr) { if(NULL != eerste) { LijstElement *nummer = eerste; while(nummer->volgende!= NULL) { Rekening *een = nummer->getRekening(); if(een->getRekNr()==rekNr) { return een; } else { nummer = nummer->volgende; } } } return NULL; }

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  • The Report Application Server failed

    - by huMpty duMpty
    This is relevent to this question about Crystal reports exception: “The Report Application Server failed” I have a report which has a on demand subreport. Id been passed to the subreport from the main report. When I run in crystal report it works fine. But I am running on a application, which display the report using crystal reports viewer.(Winform application developed in vb.net) Most of the times when click on the link whick brings the sub-report it comes up with this message The Report Application Server failed It has no details about what the reason is. Can anyone help? Thanks

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  • Handle error at non-UI thread

    - by DreamTeam Mobile
    For some reason unhandled exception which occur at non-UI thread don't handled by App_UnhandledException handler. This approach works well for Windows Phone apps to globally handle, track and analyze exceptions but doesn't work for Windows 8 apps. this.UnhandledException += App_UnhandledException; //doesn't handle private void Button_Click_1(object sender, RoutedEventArgs e) { var task = new Task(() => { throw new NullReferenceException("Test exc in UI thread"); }); task.Start(); } Please, advise.

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  • Attempted to perform an unauthorized operation

    - by Lefteris Gkinis
    Now I use the following code: Public Function SetACL(ByVal filename As String, ByVal account As String, ByVal sender As Object, ByVal e As System.EventArgs) As Boolean Try Dim rule As FileSystemAccessRule = New FileSystemAccessRule(account, FileSystemRights.Write, AccessControlType.Allow) Dim fp As PermissionSet = New PermissionSet(Permissions.PermissionState.Unrestricted) fp.AddPermission(New FileIOPermission(FileIOPermissionAccess.Read, filename)) fp.AddPermission(New FileIOPermission(FileIOPermissionAccess.Write, filename)) fp.AddPermission(New FileIOPermission(FileIOPermissionAccess.PathDiscovery, filename)) fp.Assert() Dim di As DirectoryInfo = New DirectoryInfo(Path.GetDirectoryName(filename)) SetACL = False Dim security As DirectorySecurity = di.GetAccessControl(AccessControlSections.Access) security.ModifyAccessRule(AccessControlModification.Add, rule, SetACL) di.SetAccessControl(security) Return SetACL Catch ex As Exception MessageBox.Show(ex.Message, "Set Security Sub", MessageBoxButtons.OK, MessageBoxIcon.Stop) Finalize() End Try End Function The Error of 'Attempted to perform an unauthorized operation' comes when i'm trying to execute the instraction Dim security As DirectorySecurity = di.GetAccessControl(AccessControlSections.Access) Please if anybody knows why that error comes here to respond

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  • Not able to click on all the links in Selenium Webdriver.Only the first link gets clicked

    - by Kiran
    .i want to go to a frame in which some links are there....Once I come in to a fram.i want to click all the links one by one..using webdriver...below is the code i have written.plz suggest me public static void main(String[] args) { // TODO Auto-generated method stub WebDriver driver=new FirefoxDriver(); driver.get("http://timesofindia.indiatimes.com/home"); WebDriverWait wait= new WebDriverWait(driver,200); wait.until(ExpectedConditions.presenceOfElementLocated(By.id("riShop"))); driver.switchTo().frame("riShop"); List<WebElement> lst=driver.findElements(By.tagName("a")); for(inti=0;i<lst.size();i++){ lst.get(i).click(); driver.navigate().back(); } } } } In the above code....only the first link gets clicked and then i get exception like..unable to locate the next element.....NoSuchException plz suggest me something about it...

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  • Make sure base method gets called in C#

    - by Fnatte
    Can I somehow force a derived class to always call the overridden methods base? public class BaseClass { public virtual void Update() { if(condition) { throw new Exception("..."); // Prevent derived method to be called } } } And then in a derived class : public override void Update() { base.Update(); // Forced call // Do any work } I've searched and found a suggestion to use a non-virtual Update() but also a protected virtual UpdateEx(). It just doesn't feel very neat, isn't there any better way? I hope you get the question and I am sorry for any bad English.

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  • Changing gmail Settings with Ruby

    - by Technocrat
    I need to configure my gmail account(s) programmatically with Ruby. I checked out the apps api and it looks like the simplest possible solution would be to use ClientLogin for logging in and a simple XML PUT for changing the forwarding setting, for example. I wrote a little test script like so: http://gist.github.com/373457 It would appear that the call to ClientLogin works because it comes back with an Auth= token. When it sends the PUT request to google, however, it comes back with a RestClient::Unauthorized exception. I rewrote the script with pure net/https and it turns out the message I'm getting is invalid token, yet I can't figure out what is wrong with my token. Can anyone else see it?

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  • Reading a file over a network path

    - by Sin5k4
    I have this weird issue,when I use > File FileToRead = new File("\\\\MYSERVER\\MYFOLDER\\MYFOLDER\\MYPICTURE.JPG"); to read a file over a network,all I get is a null pointer exception.Normally a local path works with this,but when on a network path,I just couldn't manage to get it to work.Any ideas? PS:oh and my network connection seems to work,no issues when accessing data in windows explorer... More of the code: File FileToRead = new File("file://DOKSERVICE/Somefolder/ProductImage/01001.JPG"); // File FileToRead = new File("c:\\dog.jpg"); local test BufferedImage image = ImageIO.read(FileToRead); BufferedImage resizedimage = new BufferedImage(260, 260,BufferedImage.TYPE_INT_RGB ); Graphics2D g = resizedimage.createGraphics(); g.drawImage(image, 0, 0, 260, 260, null); g.dispose(); picture.setIcon(new ImageIcon(image));

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  • C# move file as soon as it becomes available.

    - by m0s
    Hi, I need to accomplish the following task: Attempt to move a file. If file is locked schedule for moving as soon as it becomes available. I am using File.Move which is sufficient for my program. Now the problems are that: 1) I can't find a good way to check if the file I need to move is locked. I am catching System.IO.IOException but reading other posts around I discovered that the same exception may be thrown for different reasons as well. 2) Determining when the file gets unlocked. One way of doing this is probably using a timer/thread and checking the scheduled files lets say every 30 seconds and attempting to move them. But I hope there is a better way using FileSystemWatcher. This is a .net 3.5 winforms application. Any comments/suggestions are appreciated. Thanks for attention.

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  • Is there a faster way to download a page from the net to a string?

    - by cphil5
    I have tried other methods to download info from a URL, but needed a faster one. I need to download and parse about 250 separate pages, and would like the app to not appear ridiculously slow. This is the code I am currently using to retrieve a single page, any insight would be great. try { URL myURL = new URL("http://www.google.com"); URLConnection ucon = myURL.openConnection(); InputStream inputStream = ucon.getInputStream(); BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); ByteArrayBuffer byteArrayBuffer = new ByteArrayBuffer(50); int current = 0; while ((current = bufferedInputStream.read()) != -1) { byteArrayBuffer.append((byte) current); } tempString = new String(byteArrayBuffer.toByteArray()); } catch (Exception e) { Log.i("Error",e.toString()); }

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  • Can I correctly debug assemblies loaded with the 'AssemblyResolve' event?

    - by Thiado de Arruda
    I'm experimenting with the AppDomain's 'AssemblyResolve' event by hidding the depedencies for an executable file in another folder. The assemblies seem to beloading and executing fine, however debugging seems to be crazy, sometimes it hits my break points, sometimes it doesnt , and sometimes it hits the same code twice(It seems absurd but I'm sure the code is executing only once). I don't understanding how debuggers works but I guess it has something to do with the PDB files. Anyone got an idea of what might be happening and how can I fix it? Edit: Let me add that I'm calling methods on the dynamically loaded assemblies using reflection, sometimes the method I'm stepping over throws an exception that only pops at a later time.

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  • Is it possible to create a jdbc connection without a password (using postgresql 'trust')?

    - by mojones
    I am using jdbc to connect to a postgresql database in a java application (actually the app is written in Groovy). I have postgresql set up to use the 'trust' authentication method. Is it possible to open a jdbc connection without specifying a password? When I try to use the normal constructor with a blank password, it fails with Exception in thread "Thread-2" org.postgresql.util.PSQLException: FATAL: password authentication failed for user "myuser" Even though, from the command line, this works fine psql -U myuser mydatabase Welcome to psql 8.3.5, the PostgreSQL interactive terminal. Type: \copyright for distribution terms \h for help with SQL commands \? for help with psql commands \g or terminate with semicolon to execute query \q to quit

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  • File.Exists() returns false, but not in debug

    - by Tor Haugen
    I'm being completely confused here folks, My code throws an exception because File.Exists() returns false public override sealed TCargo ReadFile(string fileName) { if (!File.Exists(fileName)) { throw new ArgumentException("Provided file name does not exist", "fileName"); } Visual studio breaks at the throw statement, and I immediately check the value of File.Exists(fileName) in the immediate window. It returns true. When I drag the breakpoint back up to the if statement and execute it again, it throws again. fileName is an absolute path to a file. I'm not creating the file, nor writing to it (it's there all along). If I paste the path into the open dialog in Notepad, it reads the file without problems. The code is executing in a background worker. It's the only complicating factor I can think of. I am positive the file has not been opened already, either in the worker thread or elsewhere. What's going on here?

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  • Make text appear briefly in a JPanel

    - by Roo
    Hi, I am trying to make text appear briefly before it disappears. It would be along the lines of 1) Set color to black 2) wait x amount of seconds 3) set color to background color The method I call is repaint(), which then calls paintComponent(Graphics painter). repaint() is called only if I press the space-bar. I thought of trying repaint();Thread.sleep(1000);repaint(); (I do catch the Interrupt exception, just not shown), but it only calls paintComponent once per space-bar . Is there an easy way to do this or is this something that is a bit challenging?

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  • Streaming large result sets with MySQL

    - by configurator
    I'm developing a spring application that uses large MySQL tables. When loading large tables, I get an OutOfMemoryException, since the driver tries to load the entire table into application memory. I tried using statement.setFetchSize(Integer.MIN_VALUE); but then every ResultSet I open hangs on close(); looking online I found that that happens because it tries loading any unread rows before closing the ResultSet, but that is not the case since I do this: ResultSet existingRecords = getTableData(tablename); try { while (existingRecords.next()) { // ... } } finally { existingRecords.close(); // this line is hanging, and there was no exception in the try clause } The hangs happen for small tables (3 rows) as well, and if I don't close the RecordSet (which happened in one method) then connection.close() hangs.

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  • Could not find any resources appropriate for the specified culture or the neutral culture.

    - by Captain Comic
    I have created an assembly and later renamed it. Then i started getting runtime errors when calling toolsMenuName = resourceManager.GetString(resourceName); The resourceName variable is "enTools" at runtime. Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "Jfc.TFSAddIn.CommandBar.resources" was correctly embedded or linked into assembly "Jfc.TFSAddIn" at compile time, or that all the satellite assemblies required are loadable and fully signed. The code: string resourceName; ResourceManager resourceManager = new ResourceManager("Jfc.TFSAddIn.CommandBar", Assembly.GetExecutingAssembly()); CultureInfo cultureInfo = new CultureInfo(_applicationObject.LocaleID); if(cultureInfo.TwoLetterISOLanguageName == "zh") { System.Globalization.CultureInfo parentCultureInfo = cultureInfo.Parent; resourceName = String.Concat(parentCultureInfo.Name, "Tools"); } else { resourceName = String.Concat(cultureInfo.TwoLetterISOLanguageName, "Tools"); } // EXCEPTION IS HERE toolsMenuName = resourceManager.GetString(resourceName); I can see the file CommandBar.resx included in the project, i can open it and can see the "enTools" string there.

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  • How to stop an activity with GL view. Application not responding

    - by David
    I have an activity that I want to programmatically stop after some elapsed time. I have a GL view running. My understanding is that the GLSurfaceView.renderer is running in its own thread, so I created a handler instantiated from the activity. In the GLSurfaceView I post a message. The handler then attempts to stop the activity with the following: onStop(); finish(); The activity seems to close. However, if I try to restart the application, I get a blank screen, the phone is practically locked up and eventually I get a message that the activity in the application is not responding. I'm also getting geting a wake lock, ie PowerManager.newWakeLock(...). When I try to release it, I get an exception. Not sure if its the GL view of the wake lock which is causing me troubles. Any ideas appreciated.

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  • Visual Studio 2010 debug minidump

    - by Snake
    Hi all, Consider the following code (written with Visual Studio 2010 and .NET 4.0) using System; namespace DumpTester { class Program { static void Main(string[] args) { int test = new Random().Next(); Console.WriteLine(test + new Random().Next()); Test(); } private static void Test() { throw new Exception(); } } } When running outside of Visual Studio you get this nice window of Microsoft Windows 7 that it is looking for a solution. Obviously, since this is my app, there is none. At that point I create a full dump file of my application with for example Process Explorer. I then open that dmp file from its location and try to debug. But whatever I try, it can't find the location of the source symbols. I tried putting the pdb next to the dump but it just doesn't find it. What am I doing wrong?

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  • Facebook RunWithFriend redirects to homepage

    - by Clynamen
    I'm following the Canvas app Example of Facebook, but it seems that I'm unable to login succesfully, thus I'm unable to use the example app because I'm always redirected to the main page. I think I set all the parameters correctly, except for the OAuth Migration that should be enabled. There is no such option in Facebook developer panel. This is a screen of the main page as it appears to me after the login: I have the same problem explained here: Canvas demo (runwithfriends) always redirects to main page under my own GAE with the exception that even the application on facebook GAE redirects me to the main page even if I successfully log in. Did anyone experienced a similar problem?

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  • DataMapper save fails but with no errors

    - by Justin Bozonier
    When I try to modify and then save a model using DataMapper I get a SaveFailure exception but no errors. Specifically I see this message: "MonthlyBill#save returned false, MonthlyBill was not saved" This is the code doing the saving: post '/monthly_bills' do with_authenticated_user do |user| description = params[:description] expected_amount = params[:expected_amount] pay_period = params[:pay_period] monthly_bill = MonthlyBill.new(:description=>description, :expected_amount=>expected_amount, :pay_period=>pay_period) user.MonthlyBills << monthly_bill user.save end The User model: class User include DataMapper::Resource property :id, Serial property :email_address, String property :password, String has n, :MonthlyBills has 1, :CurrentPayPeriod end The MonthlyBill model: class MonthlyBill include DataMapper::Resource property :id, Serial property :description, String property :expected_amount,Decimal property :pay_period, Integer belongs_to :user end What is the issue and, more importantly, how can I get DataMapper to tell me more specifically what is wrong?

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  • Intent flags to Login page redirect, killing previous Activities

    - by Christopher Francisco
    Basically I have a Service that at some points it will sync with the network in order to check if the token is still valid. if it isn't, it should redirect to the login screen (from the service) and if the user press the back button, it should NOT show the previous Activity but instead exit the app. I'm not asking how to hack onBackPressed, I already know how to do it. I'm asking how to accomplish this using the intent flags. So far I have tried the following: intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK); Using the FLAG_ACTIVITY_NEW_TASK is mandatory because I'm calling startActivity() from a service (or at least thrown exception told me so), and using FLAG_ACTIVITY_CLEAR_TOP cause it was supposed to remove all previous activities from the stack, leaving only the new one. The issue is if I press back, I am still able to go to the previous Activity, which makes me think the combination of both flags are clearing the activities in the NEW task, not in the previous one I might be wrong on the reason, but it doesn't work. Any help will be appreciated, thanks

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  • Examples of both beautiful and ugly java code?

    - by tputkonen
    I would like to demonstrate how difficult it is for a layman to identify high quality code from flawed code. I'm thinking of doing this with the help of two java methods. Both of the methods should look like they do the same, pretty simple thing. However one of them should have several kind of flaws, for example: iteration with array off by one error string concatenations causing lots of objects to be created (as opposed to StringBuffer in the "good" code, which looks more complicated) possibly null pointer exception (but it should not be trivial to spot) Those are just some examples, all kinds of other issues including bugs and performance related structures are highly appreciated. Methods should be around 10-20 lines of length, and the task they do should be something simple - preferably printing something in an iteration.

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