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• ArchBeat Link-o-Rama Top 10 for August 19-26, 2012

  - by Bob Rhubart

  The Top 10 most popular items shared via the OTN ArchBeat Facebook page for the week of August 19-26, 2012. Now Available: Oracle SQL Developer 3.2 (3.2.09.23) The latest release of Oracle SQl Developer includes UI enhancements, 12c database support, and bug fixes. ADF Tutorial Chapter 3: Creating a Master-Detail taskflow | Yannick Ongena Oracle ACE Yannick Ongena continues his ADF tutorial with a chapter devoted to view layer and using the data control to build pages that allow user to update reference data. GlassFish Community Event at JavaOne 2012 Don't miss out on this exclusive GlassFish Community Event on Sunday, September 30th from 11:00 a.m. – 1:00 p.m. in Moscone South. Register Now! Part of JavaOne 2012. Oracle BI 11g Book Authors – Podcast #9 | Art of Business Intelligence In this home-grown podcast, authors Christian Screen, Haroun Khan, and Adrian Ward talk about their new book, "Oracle Business Intelligence Enterprise Edition 11g: A Hands-On Tutorial," about their sessions at Oracle OpenWorld, and about their ORACLENERD t-shirts. Oracle Service Bus duplicate message check using Coherence | Jan van Zoggel "Giving the fact that every message on our ESB has an unique messageID element in the SOAP header we could store this on disk, database or in memory,"says Jan van Zoggel. "With the help of Oracle Coherence this last option, in memory, is relatively simple." Even simpler with Jan's detailed instructions. Oracle Technology Network Architect Day - Boston - Sept 12 There are easier ways to increase your IT brainpower. Skip the electrodes and register for Oracle Technology Network Architect Day in Boston, September 12, 2012. This free event includes 8 technical sessions, panel Q&A, roundtable discussions—and a free lunch. 8:00 a.m. – 5:00 p.m. at the Boston Marriott Burlington, One Burlington Mall Road, Burlington, MA 01803. Oracle BPM enable BAM | Peter Paul van de Beek "BAM enables you to make decisions based on real-time information gathered from your running processes," says Peter Paul van de Beek. "With BPMN processes you can use the standard Business Indicators that the BPM Suite offers you and use them to with BAM without much extra effort." Sample Application for Switching Application Module Data Sources | Andrejus Baranovskis A sample application and how-to guide from Oracle ACE Director and ADF expert Andrejus Baranovskis. ORCLville: Some Basic BI Thoughts "If we'd stop to consider what business intelligence really is, many of us might grow a different perspective about how we implement enterprise apps," says Oracle ACE Director Floyd Teter. "What if we implemented with an eye to what kind of information we'd like to get from our enterprise apps?" Oracle VM VirtualBox 4.1.20 released |Oracle's Virtualization Blog Oracle VM VirtualBox 4.1.20 was just released at the community and Oracle download sites, reports the Fat Bloke. This is a maintenance release containing bug fixes and stability improvements. Thought for the Day "The programmer, like the poet, works only slightly removed from pure thought-stuff. He builds his castles in the air, from air, creating by exertion of the imagination. Few media of creation are so flexible, so easy to polish and rework, so readily capable of realizing grand conceptual structures." — Frederick P. Brooks Source: SoftwareQuotes

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• Game-a-Week 2 (The Sequel)

  - by Matt Christian

  After finishing Game-a-Week One I immediately wanted to go back and begin refactoring the code although I also wanted to work on a game demo idea I've had for quite awhile.  I tried doing both over the holiday weekend while up north (without internet!) and eventually hit a wall with an error. Today I am going to restart my refactoring and updates by starting Game-a-Week 2.  This challenge is to do the following: Refactor the old code Add a handful of new features to the demo This sounds simple enough but will be quite a challenge to finish in just around a week.  I have an idea on how I want to refactor the code, but the new features I'd like to implement will be tricky.  I'm going to try to implement: Quest giving / finishing / NPC's Quest Log Menu Inventory giving / receiving Inventory Menu This Game-a-Week is much more design oriented although will provide a good challenge for programming as well.  Wish me luck!

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• What good Social Networking Site solutions there are? [closed]

  - by ZetsubouWebmaster

  What good and free Social Networking Site solutions there are? I tried many options but most of them are either too complicated, too simple, or just do not work... I tried: Dolphin, DZOIC-Handshakes, elgg, Oxwall, SocialEngine, and some plugins for wp and other CMS. I don't need much, just: groups, chats, forums, profiles, PM, photos, pages, comments, search, statistics. Most of which included in pretty much every CMS out there, but not all.. So, what good solutions there are? Also I don't mind paying some money (I guess no more then $200), but I'd prefer if it was a free open source engine. Of course it should be PHP+MySQL based.

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• Web-based CMS for mobile app

  - by JWood

  I'm just about to start developing a mobile app which needs to be fed from a CMS. I started designing the tables when I thought there must be something out there which could save me a load of time and let me concentrate on the mobile side of things. So, I'm looking for a CMS that will let me create hierarchical "pages" which will just be 4-5 database fields with a simple front-end to allow to edit and update them. I don't mind having to write some code to layout the database and forms etc, any saving on starting from scratch would be good. The only requirement is that I be able to access the data via some sort of web service, REST, JSON, XML, anything really... Can anyone suggest anything that might help? Thanks, J

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• How do I cancel a time-delayed screenshot?

  - by coversnail

  I'm using the default screenshot application that comes with Ubuntu gnome-screenshot When I was using it earlier to take screenshots of the lock screen I had set a long time delay, but forgot to change it back after I'd finished. When I next took a timed screenshot I had to wait a long time for it to take because the delay was still set so long. Clicking the icon to relaunch the screenshot application has no effect whilst the timer is in effect, I imagine there is probably a simple terminal command to shut down an application, but I don't know it! Is there a way to do this?

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• How to forward an Internet connection to another network?

  - by Naveen

  Can somebody please make a shot & sweet tutorial telling how to forward an Internet connection to different network interfaces in Ubuntu...? This is the idea: I'm using a 3G usb modem to get Internet on my laptop ,which is: ppp0 IP=10.225.174.70 My Wifi device is: wlan0 MAC=78:e4:00:d4:3d:85 These devices are determined from ifconfig command. I want to share ppp0's internet connection with wlan0 device, so I can connect any other device to wlan0 and browse internet from that device. Making a Hotspot using Network settings GUI doesn't do the trick because the other device won't receive Internet, it just connects to wlan0. I heard iptables can do this, but I'm totally confused by the alien commands seen online. I'm no expert in networking. Please compose a clear & simple answer using the above devices. This is a huge annoying problem for iPhone & tablet users came to Ubuntu from Windows.

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• Managing game state / 'what to update' within an XNA game 'screen'

  - by codinghands

  Note - having read through other GDev questions suggested when writing this question I'm confident this isn't a dupe. Of course, it's 3am and I'm likely wrong, so please mod as such if so. I'm trying to figure out how best to manage state within my game screens - please bare with me though! At the moment I'm using a heavily modified version of the fantastic game state management example on the XNA site available here. This is working perfectly for my 'Screens' - 'IntroScreen' with some shiny logos, 'TitleScreen' and a 'MenuScreen' stacked on top for the title and menu, 'PlayScreen' for the actual gameplay, etc. Each screen has the a bunch of sprites, and an 'Update' and 'Draw', managed by a 'ScreenManager'. In addition to the above, and as suggested as an answer to my other question here, most screens have a 'GameProcessQueue' class full of 'GameProcess'es which lets me do just about anything (animations, youbetcha!), in any order, in sequence or parallel. Why mention all this? When I talk about managing game state I'm thinking more for complex scenarios within a 'Screen'. 'TitleScreen', 'MenuScreen' and the like are all relatively simple. 'Play Screen' less so. How do people manage the different 'states' within the screen (or whatever you call it) that 'does' gameplay? (for me, the 'PlayScreen') I've thought about the following: Enum of different states in the Screen, 'activeState' enum-type variable, switching on the enum in the Screen Update() loop to determine what Screen Update 'sub'-function is called. I can see this getting hairy pretty fast though as screens get more complex and with the 'PlayScreen' becoming a behemoth mega-class. 'State' class with Update loop - a Screen can have any number of 'States', 1+ of which are 'active'. Screen update loop calls update on all active states. States themselves know which screen they belong to, and may even belong to a 'StateManager' which handles transitioning from one state to the next. Once a state is over it's removed from the ScreenState list. The Screen doesn't need a bunch of GameProcessQueues, each State has its own. Abstract Screen further to be more flexible - I can see the similarities between what I've got (game 'Screens' handled by a ScreenManager) and what I want (states within a screen, and a mechanism to manage them). However at the moment I see 'Screens' as high level and very distinct ('PlayScreen' with baddies != 'MenuScreen' with 4 words and event handlers), where as my proposed 'States' are more intrinsically tied to a specific screen with complex requirements. I think. This is for a turn-based board game, so it's easier to define things as a discrete series of steps (IntroAnimation - P1Turn - P2Turn - P1Turn ... - GameOver - .... Obviously with an open-world RPG things are very different, but any advice in this scenario is appreciated. If I'm just going OOP-crazy please say so. Similarly I'm concious there's a huge amount on this site re: state management. But as my first 'serious' game after a couple of false starts I'd like to get this right, and would rather be harassed and modded down than never ask :)

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• Has MyEclipse implicit breakpoint in debugging mode in class URLClassPath [migrated]

  - by MJM

  I am beginner in MyEclipse IDEA. I using 8.6.1 version of it. My issue is: When I execute my program in debug mode, MyEclipse go to sun.misc.URLClassPath class and I must Resume breakpoint(by pressing F8 key) and continue executing my program. MyEclipse stay in URLClassPath class in following thread stack: 1. URLClassPath$JarLoader.<init>(URL, URLStreamHandler, HashMap) line: 581 2. URLClassPath$JarLoader.ensureOpen() line: 631 3. URLClassPath$JarLoader.getJarFile(URL) line: 641 4. URLClassPath$JarLoader.ensureOpen() line: 631 Note: this event happen when some jar file exist in my project Build-Path but when my application is simple this problem don't make and first breakpoint is my first breakpoint. Why this event happened?

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• Video capture Performance

  - by volting

  I have noticed high CPU utilization in a number of applications (except mplayer) which read from the embedded webcam on my laptop. Bizarrely CPU utilization varies proportionately to the level of illumination present. I know that that high CPU usage has nothing to do with rendering the video, as I have written a simple app using the OpenCV library to simply grab frames from the webcam, and cpu usage is still high. I think that mplayer might be using my GPU (and the other apps aren't), but since its not an issue with rendering, I dont think this explains anything. Cheese Low light --- ~12% CPU Bright Light ---- ~63% CPU Camorama Low light --- ~7% CPU Bright Light ---- ~30% CPU Opencv C++ library, (display in a single highgui window) Low light --- ~13% CPU Bright Light ---- ~40% CPU (same test on windows 7, 4-9%) Mplayer No problem, 1-2% regardless of light levels Note: If all I want't to do is capture a feed from my webcam I would use mplayer and forget about it, but I'm developing an application which uses the OpenCV to capture a video feed among other things, performance is important.

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• To implement registration page with Vaadin or not?

  - by JVerstry

  This is a tactical implementation question about usage of Vaadin or in some part of my application. Vaadin is a great framework to login users and implement sophisticated web applications with many pages. However, I think it is not very well suited to desgin pages to register new users for my application. Am I right? Am I am wrong? It seems to me that a simple HTML/CSS/Javascript login + email registration + confirmation email with confirmation link cannot be implemented easily with Vaadin. It seems like Vaadin would be overkill. Do you agree? Or am I missing something? I am looking for feedback from experienced Vaadin users.

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• Is an 'if password == XXXXXXX' enough for minimum security?

  - by Morgan Herlocker

  If I create a login for an app that has middle to low security risk (in other words, its not a banking app or anything), is it acceptable for me to verify a password entered by the user by just saying something like: if(enteredPassword == verifiedPassword) SendToRestrictedArea(); else DisplayPasswordUnknownMessage(); It seems to easy to be effective, but I certainly would not mind if that was all that was required. Is a simple check on username/password combo enough? Update: The particular project happens to be a web service, the verification is entirely server side, and it is not open-source. Does the domain change how you would deal with this?

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• Timing Calculations for Opengl ES 2.0 draw calls

  - by Arun AC

  I am drawing a cube in OpenGL ES 2.0 in Linux. I am calculating the time taken for each frame using below function #define NANO 1000000000 #define NANO_TO_MICRO(x) ((x)/1000) uint64_t getTick() { struct timespec stCT; clock_gettime(CLOCK_MONOTONIC, &stCT); uint64_t iCurrTimeNano = (1000000000 * stCT.tv_sec + stCT.tv_nsec); // in Nano Secs uint64_t iCurrTimeMicro = NANO_TO_MICRO(iCurrTimeNano); // in Micro Secs return iCurrTimeMicro; } I am running my code for 100 frames with simple x-axis rotation. I am getting around 200 to 220 microsecs per frame. that means am i getting around (1/220microsec = 4545) FPS Is my GPU is that fast? I strongly doubt this result. what went wrong in the code? Regards, Arun AC

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• Xcode Video From UITableView [migrated]

  - by Luis Felipe Beltran

  I have created different UITableViews. Each of these are dynamic tables that contain NSarrays of words. Right now When a cell is tabbed it takes the user to another View (simple view controller) that has a label and a UIImageview that displays a picture. My problem is that I also want to show video. Some of these words need to show pictures, and others need to show video. I have shown video before but I have done it using a button. I need help! I would appreciate if you guys could help here. Again, Im trying to show a video from a UITableView after the user tabs a cell. (I have many videos not just one, so dynamically would be better if possible)

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• how to write good programming logic?

  - by user106616

  recently I got job as a java developer, and now I have assigned project too. I want to know what is a good logic? when I check in the code my team lead is saying that its a good code. But when it comes to my project manager he is saying that its a bad code. And he is changing my code, after his changes if I see his code its really very very good and even simple. can you please tell me how to develop the good program, good logic? what is the best way to structure a problem in terms of code?

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• I dont know my password and wont let me change it via GRUB

  - by josh

  I recently turned off the login password so i would not have to enter my password every time I turn the system on. But now when I try to update or download anything it asks me for my password so I enter my old password and it keeps telling me its wrong when I have only ever had the 1 password and its a simple 1 so I would not forget and considering I have only had UBUNTU installed for two days it is really frustrating. I have also tried resetting it via the GRUB but it wont let me type the new password. Please help ASAP.

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• JMonkey Engine (JME) load Blender scene with textures?

  - by leigero

  I am having the hardest time trying to accomplish the simplest task. I have created a floor and 4 walls (not that complicated) in Blender. I added a basic material and cloud texture so they have something to look at other than gray. When I import them into JMonkey they show up as solid white objects with no shading or depth. White silhouettes. I thought this may be a lighting issue, but I have ambient light added to the scene. I can remove that light or adjust its intensity and it has no affect on the scene. I exported all Blender files into OgreXML format, then converted them to .j3o format in JMonkey. I renamed the textures to match their corresponding mesh and this didn't do anything. Does anybody know how to create a flat object and put it into JMonkey with a texture? This sounds simple and there is absolutely no information on this. This should be step 1!

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• How to edit pdf metadata from command line?

  - by bdr529

  I need a command line tool for editing metadata of pdf-files. I'm using a Aiptek MyNote Premium tablet for writing my notes and minutes on this device, import them later and convert them to pdf automatically with a simple script using inkscape and ghostscript. Is there any command line tool to add some categories to the pdf's metadata, so i can find the pdf later (e.g. with gnome-do) by categories? Update: I tried the solution with pdftk and it works, but it seems that gnome-do doesn't take care of pdf-metadata. Is there a way to get gnome-do to do that?

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• "Visual Studio 2010 supprime les barrières entre les développeurs et les testeurs", interview exclus

  Mise à jour du 19.04.2010 par Katleen "Visual Studio 2010 supprime les barrières entre les développeurs et les testeurs", interview exclusive de son chef de produit Il y a quelques jours, Jeff Beehler, le chef de produit monde pour Visual Studio, est venu passer quelques jours en France à l'occasion de la sortie de la version 2010 du produit. A cette occasion, nous avons pu rencontrer ce professionnel aguerri mais simple et décontracté, pour une conversation enthousiaste autour des innovations que Visual Studio 2010 apporte aux développeurs. Voici le transcript de cet entretien, je remercie tout particulièrement les membres du forum qui m'ont aidée pour les questions techniques.

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• HybridGraphics vga_switcheroo switch to intel at boot

  - by Jan

  How can I do that? I have followed this https://help.ubuntu.com/community/HybridGraphics but it didn't work I'm getting the error at boot that the /sys/kernel/debug/vgaswitcheroo/switch don't exist , so the problem seems to be that the /sys/kernel/debug don't exist when the grub parameters are processed and it is created after the grub parameter processing. So far I have made an alternative method, which works. In rc.local I granted full access to my user to /sys/kernel/debug then also to /sys/kernel/debug/vgaswitcheroo/switch and then I have made a simple script to switch the graphics to intel and putted it in ~./confif/autostart. The script is executed every time I log in to gnome. It's working however it would be nice if it worked at boot, as is described at that help.ubuntu.com page. Any ideas? Thanks

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• Can a new idea for a software project be an intellectual property?

  - by Wesley Khan

  I have to do my final year project and I am going to do some kind of stuff that no one has yet attempted to do, though the completion of the project involves some things that have already been done but I am extending those ideas to do something that no one has yet done. In simple words I have an idea that needs combination of two ideas plus something from my own. Can I claim this idea to be an intellectual property of mine so that no one else attempts to do it while I am doing the project?If Anybody does it after my project, will he need a license from me?

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• High Usage of RAM by wxPython's GUI and need some advice to reduce it

  - by user67024

  I've recently developed a GUI in wxPython for windows platform. It contains a five tabs, 4 of them are just richTextCtrl boxes and the other one has controls for uploading files, buttons, textctrls, a slider etc.. As I was new to GUI development in Python, I used wxFormBuilder to generate some of the code using a good amount of sizers. So, now the problem is that the GUI starts off with a initial memory of around 40MB which is too much for such a simple application (Or so I think) . Also, when the functions handling the functions use huge lists as the program is for debugging large data logs and identifying the problems in'em implying that I can't afford memory for GUI. So, how can I reduce that start working memory size? Is it a general issue in wxPython? And currently trying use profilers but not sure if it's going to help.

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• Can I remove the latest ubuntu version without having to reinstall the old version?

  - by Emily

  I was using the 2.6 kernels with no problems, but when I updated to the 3.0 kernel, my bootup failed. I can manually boot with ctrl+alt+f1 startx and my login, but admittedly, i googled this and have no idea what I'm really doing. I have been trying to figure out how to go back to the old version, and eventually figured out the grub menu--i booted from all three 2.6 (.8, .10, and .11) editions of the previous version of ubuntu but they all had the same error as the 3.0 kernal. I can get logged in manually once the boot fails, but when i get to my desktop, wireless is not responsive and will not connect, and portable hard drives do not mount and/or are unresponsive. the previous version worked perfectly. I use an asus netbook. it's an eee pc. i don't have two OSs on it. i had to go to another computer to get to the forum... If the solution is simple, i just don't know what it is.

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• Handling Players, enemies and attacks in HTML5

  - by Chris Morris

  I'm building a simple (currently) game with free roaming player and monsters on a map built by a 2D grid. I've been looking at the methods for implementing characters and enemies onto the screen and I've seen two seperate methods for doing this online. Drawing the player onto the screen canvas directly and refreshing the entire screen every FPS tick. Having a separate canvas to handle the player and moving the player canvas on top of the screen canvas via absolute positioning. I can see some pros and cons of both methods but what is generally the best method for doing this? I assume the second due to not having to drain resources by refreshing the map when the user is not moving, but the type of game will generally have constant movement.

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• Animation file format

  - by Paul

  I'm trying to make a simple 2D animation file format. It'll be very rudimentary: only an XML file containing some parameters (such as frame duration) and metadata, and some images, each representing a frame. I'd like to have the whole animation (frames and XML document) packed in a single file. How do you suggest I do that? What libraries are there that would allow easy access to the files inside the animation file itself? The language I'm using is C++ and the platform is Windows, but I'd rather not use a platform dependent library, if possible.

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• A story of Murphy&ndash;my technical issues at TechDays Switzerland #chtd

  - by Laurent Bugnion

  I had two sessions at the recent Swiss TechDays. While the first one (Advanced Development for Windows Phone 8) went extremely well (I think), I had a very annoying technical issue in the beginning of my second session. First let me add that I talked to Microsoft about that and I hope they will change a few things in the room assignment for next year. My two sessions were one right after the other, with only 15 minutes break to change room. I don’t mind having two sessions so close from each other, but I would really like them to be in the same room in order to avoid having to move my laptops (plural, that will become important later) and redoing the tech check. That being said, I am guilty of not checking where my talks would be before the day before the conference, and when I did notice, it was too late to change it. After my first session, I quickly moved to the other room and setup my main laptop, a Dell Precision. We tested the video output (VGA) and didn’t notice anything special. The projectors are using a fairly high resolution (kudos to the Basel conference center for not having old school 1024x768 projectors anymore, that makes Blend really hard to demo ;) but since everything went great during the first talk, I was not worried. In fact I even had some time to chat with some early attendees about my Microsoft Surface and the Samsung Slate 7, which I had carried with me in addition to the Precision. I just thought it would be nice to show the hardware that Windows 8 can run on, without thinking any further. When the session started, I immediately noticed that the main screen was not showing anything. I thought I had just forgotten to switch to “duplicate” for the video output, and did that with a quick Win-P. However it didn’t “hold”. After 2 seconds, it reverted back to a black display for my attendees. Then I started to really worry. We tried everything, switching from VGA to HDMI, changing the resolution, setting the projector as primary display, but nothing did the trick. The projector was just refusing to show my screen. Now, to show you how despaired I started to be, I even considered using the “extend” setting (which worked just fine), and to use one of the feedback monitors on the floor but really it was super cumbersome. Eventually, my last resort arrived: I started my Samsung Slate 7, which by chance has Visual Studio 12 and Blend 5 installed, plugged the HDMI projector in the dock (yes, I had the dock with me, which I usually don’t!), connected it to internet (had to enter a long password for that), loaded the source code from my main machine using a USB stick and…. finally started to give my presentation. All in all I think we lost about 10 minutes. Amongst the most horrible minutes of my whole life, truly (yes I am blessed, I didn’t have that many horrible minutes in my life ;) I really want to apologize to my attendees. We joked a bit during the attempts to resolve the issue, the reactions I had after the session were all very nice and sympathetic. Only a handful of people left my session while I was having the issues, and I really don’t blame them (who knew how long the problem would last!!). But still, I probably talked at more than 60 sessions over the years, and this was by far my most painful moment. What did I learn? So what did I learn from this? Well from now on I will always have my slate ready with the latest source code, internet connection and every tool I might need during the presentation. This way, if I detect even a hint that the Precision might not work, I will just switch to the Slate. The experience of presenting on the slate is actually not bad at all, it is just a bit slow for my taste, but it does work. By the way, I will be posting the code and slides for my sessions very soon, I just need to “clean it and zip it”. Stay tuned, and thanks again for your patience in that horrible circumstance. Cheers Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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