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• Ubuntu 12.04 x64 LTS VPN Server not changing IP

  - by user288778

  I used this guide http://silverlinux.blogspot.co.uk/2012/05/how-to-pptp-vpn-on-ubuntu-1204-pptpd.html and it worked fine. I'm able to connect but the problem is, that my IP being changed to "localip" not "remote ip". This is what I get from tail -f /var/log/syslog [code] June 6 00:09:19 instant5860 NetworkManager[1456]: Unmanaged Device found; state CONNECTED forced (see http://bugs.launchpad.net/bugs/191889) June 6 00:09:19 instant5860 NetworkManager[1456]: Marking connection 'Wired connection 1' invalid. June 6 00:09:19 instant5860 NetworkManager[1456]: Activation (eth1) failed. June 6 00:09:19 instant5860 NetworkManager[1456]: Activation (eth1) Stage 4 of 5 (IPv4 Configure Timeout) complete. June 6 00:09:19 instant5860 NetworkManager[1456]: (eth1): device state change: failed - disconnected (reason 'none') [120 30 0] June 6 00:09:19 instant5860 NetworkManager[1456]: (eth1): deactivating device (reason 'none') [0] June 6 00:09:19 instant5860 NetworkManager[1456]: Unmanaged Device found; state CONNECTED forced. June----- avahi-daemon[440]: Withdrawing address record for fe80......... on eth1 Jun------avahi-daemon[440]: Leaving mDNS multicast group on interface eth1. IPv6 with address fe80..... Jun------avahi-daemon[440]: Interface eth1.IPv6 no longer relevant for mDNS. Jun------avahi-daemon[440]: Joining mDNS multicast group on interface eth1.IPv6 with address fe80.... Jun------avahi-daemon[440]: New relevant interface eth1.IPv6 for mDNS Jun------avahi-daemon[440]: Registering new address record for fe80..... on eth1.*. Jun - snmpd[1172]: error on subcontainer 'ia_addr' insert (-1) dbusp382]: [syste] Activating service name='org.freedesktop.PackageKit' (using servicehelper) AptDaemon: INFO: Initializing daemon AptDaemon.PackageKit: INFO: Initializing PackageKit compat layer dbus[382]: [system] Successfu;;y activated service 'org.freedesktop.PackageKit' AptDaemon.PackageKit: INFO: Initializing PackageKit transaction AptDaemon.Worker: INFO: Simulating trans: /org/debian/apt/transaction/233beca013a0473ea34d9dea805af5df AptDaemon.Worker: INFO: Processing transaction /org/debian/apt... AptDaemon.PackageKit: INFO: Get updates() AptDaemon.Worker: INFO: Finished snmpd[1172]: error on subcontainer pptpd[23611]: CTRL: Client 82.33.... control connection started pptpd[23611]: CTRL: Starting call (launching pppd, opening GRE) pptpd[23611]: pppd 2.4.5 started by root uid 0 pptpd[23611]: Using interface ppp0 pptpd[23611]: Connect ppp0 <-- /dev/pts/1 NetworkManager[1456]: SCPlugin - Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0) NetworkManager[1456]:SCPlugin - Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found. pptpd[23612]: peer from calling number 82... authorized. kernel: [2918261.416923] init: ufw pre-start process (23613) terminated with status 1 dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 7 CTRL: Ignored a SET LING info packet with real ACCMs! local IP address:109.0.121.197 remote IP address: 109.0.84.56 dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 13 NetworkManager[1456]: (eth1): DHCPv4 request timed out. NetworkManager[1456]: (eth1): canceled DHCP transaction, DHCP client pid 23280 NetworkManager[1456]: Activation (eth1) Stage 4 of 5 (IPv4 Configure Timeout) scheduled... NetworkManager[1456]: Activation (eth1) Stage 4 of 5 (IPv4 Configure Timeout) started... NetworkManager[1456]: (eth1): device state change: ip-config - failed (reason 'ip-config-unavailable') [70 120 5[ NetworkManager[1456]: Unmanaged 'ia_addr' insert (-1)[/code]

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• Managed Extensibility Framework

  MEF is the Framework which allows you to load extensions to your application easily. It does discovery and composition of parts you need to be included in your application at run-time. You could extend your behavior simply by adding a new Plugin.

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• Why are graphics so slow/jerky/lagged with an ATI 4250?

  - by Ben

  Never had a problem with Maverick, always very fast. I upgrade to Natty and the graphics seem to be very lagged. CPU, load, and memory usage is low, all graphics are choppy and lagged though. I have the proprietary driver installed and everything. Alt-Tabbing takes 3-5 seconds for the dialog to popup, zooming in with compiz zoom makes things very slow. I never had any of these problems with 10.10 Thanks

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• Binding MediaElement to a ViewModel in a Windows 8 Store App

  - by jdanforth

  If you want to play a video from your video-library in a MediaElement control of a Metro Windows Store App and tried to bind the Url of the video file as a source to the MediaElement control like this, you may have noticed it’s not working as well for you: <MediaElement Source="{Binding Url}" /> I have no idea why it’s not working, but I managed to get it going using  ContentControl instead: <ContentControl Content="{Binding Video}" /> The code behind for this is: protected override void OnNavigatedTo(NavigationEventArgs e) {     _viewModel = new VideoViewModel("video.mp4");     DataContext = _viewModel; } And the VideoViewModel looks like this: public class VideoViewModel {     private readonly MediaElement _video;     private readonly string _filename;       public VideoViewModel(string filename)     {         _filename = filename;         _video = new MediaElement { AutoPlay = true };         //don't load the stream until the control is ready         _video.Loaded += VideoLoaded;     }       public MediaElement Video     {         get { return _video; }     }       private async void VideoLoaded(object sender, RoutedEventArgs e)     {         var file = await KnownFolders.VideosLibrary.GetFileAsync(_filename);         var stream = await file.OpenAsync(FileAccessMode.Read);         _video.SetSource(stream, file.FileType);     } } I had to wait for the MediaElement.Loaded event until I could load and set the video stream.

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• Pros and Cons of various career paths [closed]

  - by Snitse

  What are the advantages and disadvantages of various career paths within CS? By a path I mean something like: Web Development GUI Development Sys admin/DB admin/network admin Security (maybe should be grouped with sys admin) Programming back end (like a C programmer) Algorithm Development heavy programming And any other you think should be in this list. What are the various areas in which each of these professions excels, or lags?

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• T-SQL Tuesday #016:Check Your Service Accounts with PowerShell

  - by AllenMWhite

  T-SQL Tuesday #016:Check Your Service Accounts with PowerShell This T-SQL Tuesday is about Aggregate Functions. It may be a bit of a stretch, but a security best practice to use separate service accounts for all your SQL Server services, so I've written some PowerShell code to check to see if any account is used more than once on a given machine. I take advantage of the SQLWmiManagement DLL to find the SQL Server services, which is a safer bet than filtering on a service name. First I load the SQLWmiManagement...(read more)

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• GRUB problem after uninstalling mint

  - by Yehonatan Tsirolnik

  I've uninstalled Linux Mint 13 today from my netbook. The netbook was running Windows XP and Linux Mint on dual boot. I've deleted the Linux's partition and now whenever I turn on the computer I get "Partitation not found" grub error... I have no CD drive so I can't insert any repair CDs or XP CD. I'm currently hopeless. And now I can't even load Linux Mint from my USB drive... Can someone help me?

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• Chrome Countdown Extension [migrated]

  - by Mike Saffold

  I have modified this countdown script to countdown to 4:20pm everyday. I have attempted to create a Google Chrome app that displays the countdown. The javascript is supposed replace a paragraph tag with id of "note" with the time left. It works when I load the page in chrome, but does not work when I load the extension. Example, if I put: <p id="note">asdf</a> I get just the text, "asdf", but when I open the html file I get the countdown. Here is the manifest.json file: { "name": "My First Extension", "version": "1.0", "manifest_version": 2, "description": "The first extension that I made.", "browser_action": { "default_icon": "icon.png", "default_popup": "popup.html" } } Here is the popup.html code: <html> <head> <title>4:20PM Countdown</title> <!-- Our CSS stylesheet file --> <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Open+Sans+Condensed:300" /> <link rel="stylesheet" href="http://treesmoke.com/cd/assets/css/styles.css" /> <link rel="stylesheet" href="http://treesmoke.com/cd/assets/countdown/jquery.countdown.css" /> </head> <body> <p id="note">asdf</p> <!-- JavaScript includes --> <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script> <script type="text/javascript" src="http://treesmoke.com/cd/assets/countdown/jquery.countdown.js"></script> <script type="text/javascript" src="http://treesmoke.com/cd/assets/js/script.js"></script> </body> </html> Here's the popup.html page, showing that the script works. Thanks guys, it isn't that big of a deal if I can't get it to work. I was just bored and decided to learn a little.

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• Controller instantiation in Yii framework by directory and namespace

  - by Einoras Bružas

  Yii framework supports modules and also subdirectories in controllers directory, so path to some specific action could be /index.php?r=module/controller/action or /index.php?r=subdirectoryInControllerDir/controller/action. My goal here is to have multiple subdirectories in controllers dir. Inside these folders I would create Controllers with the same names as parent ones using namespaces. However if I wrote namespace mynamespace; class MyController extends \MyController { } Yii would load MyController instead of mynamespace\MyController; Any suggestions here?

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• executing .sh file from java program [migrated]

  - by user778900

  i have a .sh file stored in some linux system.the full path of the file is "/comviva/CPP/Kokila/TransactionHandler/scripts/stopTH.sh". i am tring to execute it by Runtime.getRuntime().exec("/comviva/CPP/Kokila/TransactionHandler/scripts/stopTH.sh"). but it is giving some exception. i want to execute that file from my java program in windows mechine. is it possible.?if yes then plese give me some code .. thanks koushik

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• mobile app development noob

  - by hit

  I know c, most of c++, a little assembly, win32 console, etc I'm looking for free, cross-platform, c / c++, emulator, etc I'm a beginner to the mobile app world, so I'm lost. some that pop to mind on this list: http://en.wikipedia.org/wiki/Mobile_application_development Airplay SDK, Aqua, BatteryTech, DragonFireSDK, IwGame Engine, Symbian, Windows Mobile i don't wanna use a API that is considered obsolete, if someone could set me on the right path, thanks

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• How can I make sure one Upstart job starts before other Upstart jobs?

  - by marrusl

  This is a general Upstart question, but let me use a specific case: Centrify is an NIS to ActiveDirectory gateway. It needs to load before any service that will depend the authentication service that it provides, e.g. autofs, cron, nis, et al. This has proven to be quite challenging to achieve, even when trying to change the dependencies of the other services (which I don't think we should be doing anyway, I don't want to touch the other Upstart jobs if at all possible). Suggestions?

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• LibGDX onTouch() method Array and flip method

  - by johnny-b

  How can I add this on my application. i want to use the onTouch() method from the implementation of the InputProcessor to kill the enemies on screen. how do i do that? do i have to do anything to the enemy class? also i am trying to add a Array of enemies and it keeps throwing exceptions or the bullet now is facing LEFT <--- again after I used the flip method in the bullet class. All the code is below so please anyone feel free to have a look thanks. please help Thank you M // This is the bullet class. public class Bullet extends Sprite { public static final float BULLET_HOMING = 6000; public static final float BULLET_SPEED = 300; private Vector2 velocity; private float lifetime; private Rectangle bul; public Bullet(float x, float y) { velocity = new Vector2(0, 0); setPosition(x, y); AssetLoader.bullet1.flip(true, false); AssetLoader.bullet2.flip(true, false); setSize(AssetLoader.bullet1.getWidth(), AssetLoader.bullet1.getHeight()); bul = new Rectangle(); } public void update(float delta) { float targetX = GameWorld.getBall().getX(); float targetY = GameWorld.getBall().getY(); float dx = targetX - getX(); float dy = targetY - getY(); float distToTarget = (float) Math.sqrt(dx * dx + dy * dy); dx /= distToTarget; dy /= distToTarget; dx *= BULLET_HOMING; dy *= BULLET_HOMING; velocity.x += dx * delta; velocity.y += dy * delta; float vMag = (float) Math.sqrt(velocity.x * velocity.x + velocity.y * velocity.y); velocity.x /= vMag; velocity.y /= vMag; velocity.x *= BULLET_SPEED; velocity.y *= BULLET_SPEED; bul.set(getX(), getY(), getOriginX(), getOriginY()); Vector2 v = velocity.cpy().scl(delta); setPosition(getX() + v.x, getY() + v.y); setOriginCenter(); setRotation(velocity.angle()); } public Rectangle getBounds() { return bul; } public Rectangle getBounds1() { return this.getBoundingRectangle(); } } // This is the class where i load all the images from public class AssetLoader { public static Texture texture; public static TextureRegion bg, ball1, ball2; public static Animation bulletAnimation, ballAnimation; public static Sprite bullet1, bullet2; public static void load() { texture = new Texture(Gdx.files.internal("SpriteN1.png")); texture.setFilter(TextureFilter.Nearest, TextureFilter.Nearest); bg = new TextureRegion(texture, 80, 421, 395, 30); bg.flip(false, true); ball1 = new TextureRegion(texture, 0, 321, 32, 32); ball1.flip(false, true); ball2 = new TextureRegion(texture, 32, 321, 32, 32); ball2.flip(false, true); bullet1 = new Sprite(texture, 380, 350, 45, 20); bullet1.flip(false, true); bullet2 = new Sprite(texture, 425, 350, 45, 20); bullet2.flip(false, true); TextureRegion[] balls = { ball1, ball2 }; ballAnimation = new Animation(0.16f, balls); ballAnimation.setPlayMode(Animation.PlayMode.LOOP); } Sprite[] bullets = { bullet1, bullet2 }; bulletAnimation = new Animation(0.06f, aims); bulletAnimation.setPlayMode(Animation.PlayMode.LOOP); } public static void dispose() { texture.dispose(); } // This is for the rendering or drawing onto the screen/canvas. public class GameRenderer { private Bullet bullet; private Ball ball; public GameRenderer(GameWorld world) { myWorld = world; cam = new OrthographicCamera(); cam.setToOrtho(true, 480, 320); batcher = new SpriteBatch(); // Attach batcher to camera batcher.setProjectionMatrix(cam.combined); shapeRenderer = new ShapeRenderer(); shapeRenderer.setProjectionMatrix(cam.combined); // Call helper methods to initialize instance variables initGameObjects(); initAssets(); } private void initGameObjects() { ball = GameWorld.getBall(); bullet = myWorld.getBullet(); scroller = myWorld.getScroller(); } private void initAssets() { ballAnimation = AssetLoader.ballAnimation; bulletAnimation = AssetLoader.bulletAnimation; } public void render(float runTime) { Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT); batcher.begin(); batcher.disableBlending(); batcher.enableBlending(); batcher.draw(AssetLoader.ballAnimation.getKeyFrame(runTime), ball.getX(), ball.getY(), ball.getWidth(), ball.getHeight()); batcher.draw(AssetLoader.bulletAnimation.getKeyFrame(runTime), bullet.getX(), bullet.getY(), bullet.getOriginX(), bullet.getOriginY(), bullet.getWidth(), bullet.getHeight(), 1.0f, 1.0f, bullet.getRotation()); // End SpriteBatch batcher.end(); } } // this is to load the image etc on the screen i guess public class GameWorld { public static Ball ball; private Bullet bullet; private ScrollHandler scroller; public GameWorld() { ball = new Ball(480, 273, 32, 32); bullet = new Bullet(10, 10); scroller = new ScrollHandler(0); } public void update(float delta) { ball.update(delta); bullet.update(delta); scroller.update(delta); } public static Ball getBall() { return ball; } public ScrollHandler getScroller() { return scroller; } public Bullet getBullet() { return bullet; } } //This is the input handler class public class InputHandler implements InputProcessor { private Ball myBall; private Bullet bullet; private GameRenderer aims; // Ask for a reference to the Soldier when InputHandler is created. public InputHandler(Ball ball) { myBall = ball; } @Override public boolean touchDown(int screenX, int screenY, int pointer, int button) { return false; } @Override public boolean keyDown(int keycode) { return false; } @Override public boolean keyUp(int keycode) { return false; } @Override public boolean keyTyped(char character) { return false; } @Override public boolean touchUp(int screenX, int screenY, int pointer, int button) { return false; } @Override public boolean touchDragged(int screenX, int screenY, int pointer) { return false; } @Override public boolean mouseMoved(int screenX, int screenY) { return false; } @Override public boolean scrolled(int amount) { return false; } } i am rendering all graphics in a GameRender class and a gameworld class if you need more info please let me know I am trying to make the array work but keep finding that when an array is initialized then the bullet fips back to the original and ends up being backwards???? and if I create an array I keep getting Exceptions throw??? Thank you for any help given.

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• Applying DDD principles in a RESTish web service

  - by Andy

  I am developing an RESTish web service. I think I got the idea of the difference between aggregation and composition. Aggregation does not enforce lifecycle/scope on the objects it references. Composition does enforce lifecycle/scope on the objects it contain/own. If I delete a composite object then all the objects it contain/own are deleted as well, while the deleting an aggregate root does not delete referenced objects. 1) If it is true that deleting aggregate roots does not necessary delete referenced objects, what sense does it make to not have a repository for the references objects? Or are aggregate roots as a term referring to what is known as composite object? 2) When you create an web service you will have multiple endpoints, in my case I have one entity Book and another named Comment. It does not make sense to leave the comments in my application if the book is deleted. Therefore, book is a composite object. I guess I should not have a repository for comments since that would break the enforcement of lifecycle and rules that the book class may have. However I have URL such as (examples only): GET /books/1/comments POST /books/1/comments Now, if I do not have a repository for comments, does that mean I have to load the book object and then return the referenced comments? Am I allowed to return a list of Comment entities from the BookRepository, does that make sense? The repository for Book may eventually become rather big with all sorts of methods. Am I allowed to write JPQL (JPA queries) that targets comments and not books inside the repository? What about pagination and filtering of comments. When adding a new comment triggered by the POST endpoint, do you need to load the book, add the comment to the book, and then update the whole book object? What I am currently doing is having a own CommentRepository, even though the comments are deleted with the book. I could need some direction on how to do it correct. Since you are exposing not only root objects in RESTish services I wonder how to handle this at the backend. I am using Hibernate and Spring.

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• NUnit Random Module

  - by Tra5is

  I've noticed something curious. When I attach the VS2010 debugger to the nunit.exe running process I see a loaded module with no path and a randomly generated filename. I tried attaching WinDBG to the exact same instance of NUnit.exe and the module is NOT listed in the module list. I also can't find anything with Google so I'm hoping someone here could help out. Is this normal NUnit behavior or is something sneaky going on? Some examples of the module name: 1xmsg0gj x4max0ed koh9hmef

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• HTML5 - check if font has loaded

  - by espais

  At present I load my font for my game in with @font-face For instance: @font-face { font-family: 'Orbitron'; src: url('res/orbitron-medium.ttf'); } and then reference it throughout my JS implementation as such: ctx.font = "12pt Orbitron"; where ctx is my 2d context from the canvas. However, I notice a certain lag time while the font is downloaded to the user. Is there a way I can use a default font until it is loaded in?

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• Will Beej's Guide to Network programming point me the right way to be able to make multiplayer games and a web broswer?

  - by Logan545

  I'm new to socket programming in C, and I've found the Beej's Guide to Networking programming. It looks fine and all, however, I just wanted to ask whether this tutorial will point me in the right direction in terms of network programming. I plan to build a game in opengl that will be multiplayer using c+ and possibly a web browser. I know this tutorial would by no means teach me how to do this, but would this be a good way to start off on my path?

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• Is it possible to use the Volume Notifications from Gnome Shell in XFCE?

  - by Uri Herrera

  I somehow had them working before in 11.10 but I don't really remember what did I do back then other than activating "load Gnome components on start up" in the XFCE's settings manager. I've tried the same in 12.04 but doesn't seem to do anything, I specifically ask for the Volume notifications as other notifications used notify-osd or xfce4-notifyd but the volume one was Gnome's (I found that later) As far as I know it uses notification-daemonbut installing it instead of the other two doesn't give me the correct notifications. I'm using XFCE 4.10

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• Software center freezing on start up

  - by user170522

  I already did the apt-get purge, install and update thing but it still freezes when trying to start. This is what I get trying to start in terminal: cliff@cliff-Aspire-X1301:~$ software-center 2013-06-26 17:00:29,092 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None' 2013-06-26 17:00:29,097 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True 2013-06-26 17:00:29,501 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file 2013-06-26 17:00:29,653 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None. Killed

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• Programmatically Getting Name of Front-most (currently running) application in Unity

  - by NHDaly

  I am trying to write a script that executes differently depending on the currently active program, and I am wondering if there is any way to find this programatically. For example, I come from the Mac world, and in Apple's Applescript you can do the following: set appPath to the path to the frontmost application set appName to the name of file appPath and that will give you the name of the currently running application. Is there anything similar that I can do in ubuntu-land? Thanks!

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• Parsing error when bootstrapping on Windows

  - by Claude Tyler McAdams

  I am trying to get Juju working on Windows 8 but I am running in to some errors when trying to get juju to see my ssh keys: C:\Users\username> juju bootstrap error: error parsing environment "azure": read C:\Users\user\SkyDrive\Documents\Azure\ssh\: The handle is invalid. I've added a public key I generated with putty to the directory above called azure My environments.yaml file has this in it: authorized-keys-path: C:\Users\user\SkyDrive\Documents\Azure\ssh\ Any ideas?

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• Mount secure WebDAV with davfs2 ssl error

  - by Wouter0100

  I try to mount my secure webdav on my Ubuntu notebook, I've added the following to my fstab: https://[URL] /mnt/[folder] davfs user,auto,uid=wouter0100,file_mode=600,dir_mode=700 0 1 But when I run the command sudo mount -a I keep getting: /sbin/mount.davfs: Mounting failed. Server certificate verification failed: issuer is not trusted I've tried very much different things, but I couldn't get it working.. It's signed by Comodo and valid (when I load it in Chrome it's okay).

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• ubuntu 12.04 server doesn't resolve local domain name

  - by jdog

  After apt-get upgrade this morning, my Ubuntu 12.04 web server does no longer resolve a domain name hosted on it. I also received the error message: "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing anything." I found this question Network Manager not populating resolv.conf but the solutions provided there did not resolve the problem. Creating the symlink in fact caused websites to load very slowly, so I assume there is some sort of (reverse?) DNS lookup not working, when I create the symlink.

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• Controlling the Sizing of the af:messages Dialog

  - by Duncan Mills

  Over the last day or so a small change in behaviour between 11.1.2.n releases of ADF and earlier versions has come to my attention. This has concerned the default sizing of the dialog that the framework automatically generates to handle the display of JSF messages being handled by the <af:messages> component. Unlike a normal popup, you don't have a physical <af:dialog> or <af:window> to set the sizing on in your page definition, so you're at the mercy of what the framework provides. In this case the framework now defines a fixed 250x250 pixel content area dialog for these messages, which can look a bit weird if the message is either very short, or very long. Unfortunately this is not something that you can control through the skin, instead you have to be a little more creative. Here's the solution I've come up with.  Unfortunately, I've not found a supportable way to reset the dialog so as to say  just size yourself based on your contents, it is actually possible to do this by tweaking the correct DOM objects, but I wanted to start with a mostly supportable solution that only uses the best practice of working through the ADF client side APIs. The Technique The basic approach I've taken is really very simple.  The af:messages dialog is just a normal richDialog object, it just happens to be one that is pre-defined for you with a particular known name "msgDlg" (which hopefully won't change). Knowing this, you can call the accepted APIs to control the content width and height of that dialog, as our meerkat friends would say, "simples" 1 The JavaScript For this example I've defined three JavaScript functions.   The first does all the hard work and is designed to be called from server side Java or from a page load event to set the default. The second is a utility function used by the first to validate the values you're about to use for height and width. The final function is one that can be called from the page load event to set an initial default sizing if that's all you need to do. Function resizeDefaultMessageDialog() /**  * Function that actually resets the default message dialog sizing.  * Note that the width and height supplied define the content area  * So the actual physical dialog size will be larger to account for  * the chrome containing the header / footer etc.  * @param docId Faces component id of the document  * @param contentWidth - new content width you need  * @param contentHeight - new content height  */ function resizeDefaultMessageDialog(docId, contentWidth, contentHeight) {   // Warning this value may change from release to release   var defMDName = "::msgDlg";   //Find the default messages dialog   msgDialogComponent = AdfPage.PAGE.findComponentByAbsoluteId(docId + defMDName); // In your version add a check here to ensure we've found the right object!   // Check the new width is supplied and is a positive number, if so apply it.   if (dimensionIsValid(contentWidth)){       msgDialogComponent.setContentWidth(contentWidth);   }   // Check the new height is supplied and is a positive number, if so apply it.   if (dimensionIsValid(contentHeight)){       msgDialogComponent.setContentHeight(contentHeight);   } }  Function dimensionIsValid()  /**  * Simple function to check that sensible numeric values are   * being proposed for a dimension  * @param sampleDimension   * @return booolean  */ function dimensionIsValid(sampleDimension){     return (!isNaN(sampleDimension) && sampleDimension > 0); } Function  initializeDefaultMessageDialogSize() /**  * This function will re-define the default sizing applied by the framework   * in 11.1.2.n versions  * It is designed to be called with the document onLoad event  */ function initializeDefaultMessageDialogSize(loadEvent){   //get the configuration information   var documentId = loadEvent.getSource().getProperty('documentId');   var newWidth = loadEvent.getSource().getProperty('defaultMessageDialogContentWidth');   var newHeight = loadEvent.getSource().getProperty('defaultMessageDialogContentHeight');   resizeDefaultMessageDialog(documentId, newWidth, newHeight); } Wiring in the Functions As usual, the first thing we need to do when using JavaScript with ADF is to define an af:resource  in the document metaContainer facet <af:document>   ....     <f:facet name="metaContainer">     <af:resource type="javascript" source="/resources/js/hackMessagedDialog.js"/>    </f:facet> </af:document> This makes the script functions available to call.  Next if you want to use the option of defining an initial default size for the dialog you use a combination of <af:clientListener> and <af:clientAttribute> tags like this. <af:document title="MyApp" id="doc1">   <af:clientListener method="initializeDefaultMessageDialogSize" type="load"/>   <af:clientAttribute name="documentId" value="doc1"/>   <af:clientAttribute name="defaultMessageDialogContentWidth" value="400"/>   <af:clientAttribute name="defaultMessageDialogContentHeight" value="150"/>  ...   Just in Time Dialog Sizing  So  what happens if you have a variety of messages that you might add and in some cases you need a small dialog and an other cases a large one? Well in that case you can re-size these dialogs just before you submit the message. Here's some example Java code: FacesContext ctx = FacesContext.getCurrentInstance();          //reset the default dialog size for this message ExtendedRenderKitService service =              Service.getRenderKitService(ctx, ExtendedRenderKitService.class); service.addScript(ctx, "resizeDefaultMessageDialog('doc1',100,50);");          FacesMessage msg = new FacesMessage("Short message"); msg.setSeverity(FacesMessage.SEVERITY_ERROR); ctx.addMessage(null, msg);  So there you have it. This technique should, at least, allow you to control the dialog sizing just enough to stop really objectionable whitespace or scrollbars. 1 Don't worry if you don't get the reference, lest's just say my kids watch too many adverts.

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• Unintentional run-in with C# thread concurrency

  - by geekrutherford

  For the first time today we began conducting load testing on a ASP.NET application already in production. Obviously you would normally want to load test prior to releasing to a production environment, but that isn't the point here.   We ran a test which simulated 5 users hitting the application doing the same actions simultaneously. The first few pages visited seemed fine and then things just hung for a while before the test failed. While the test was running I was viewing the performance counters on the server noting that the CPU was consistently pegged at 100% until the testing tool gave up.   Fortunately the application logs all exceptions including those unhandled to the database (thanks to log4net). I checked the log and low and behold the error was:   System.ArgumentException: An item with the same key has already been added. (The rest of the stack trace intentionally omitted)   Since the code was running with debug on the line number where the exception occured was also provided. I began inspecting the code and almost immediately it hit me, the section of code responsible for the exception is trying to initialize a static class. My next question was how is this code being hit multiple times when I have a rudimentary check already in place to prevent this kind of thing (i.e. a check on a public variable of the static class before entering the initializing routine). The answer...the check fails because the value is not set before other threads have already made it through.   Not being one who consistently works with threading I wasn't quite sure how to handle this problem. Fortunately a co-worker recalled having to lock a section of code in the past but couldn't recall exactly how. After a quick search on Google the solution is as follows:   Object objLock = new Object(); lock(objLock) { //logic requiring lock }   The lock statement takes an object and tells the .NET runtime that the current thread has exclusive access while the code within brackets is executing. Once the code completes, the lock is released for another thread to utilize.   In my case, I only need to execute the inner code once to initialize my static class. So within the brackets I have a check on a public variable to prevent it from being initialized again.

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