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• Getting into game/game engine programming

  - by Darkslash

  So I am interested in learning game programming, but I really have an interest in the lower level engineering in games. I have openGL experience, and I am really interested in learning more about implementing AI, Physics, etc. I have a computer science degree, so I really like getting into technical stuff. Many times when I ask about this sort of thing, I get a lot of "Use an engine", "Use Unity3d", "Why waste your time writing code that already exists", etc etc. My idea was to use simpler libraries such as SFML or XNA so that I could learn how to implement the more complex systems. The thing is, although I do want to write games, I want to learn things that using something like Unity simply doesnt teach you. My goal is not to make a current generation quality 3D game to sell, I just want to make some cool smaller games and learn all I can about the programming side of game development. Is this something that people just do not do anymore? It seems like everywhere I turn people are using Unity or UDK or GameMaker. I fully understand why you would use a tool like these, but I cant see how they would suit my purposes. So where does someone like myself turn? Am I trying to learn something that people just do not bother doing anymore? Is the innovation in this area gone and just all about gameplay now? Im sorry if this question seems silly, but I am genuinely interested in knowing more about this and meeting more people who are interested in this sort of thing.

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• Box2d - Attaching a fired arrow to a moving enemy

  - by Satchmo Brown

  I am firing an arrow from the player to moving enemies. When the arrow hits the enemy, I want it to attach exactly where it hit and cause the enemy (a square) to tumble to the ground. Excluding the logistics of the movement and the spin (it already works), I am stuck on the attaching of the two bodies. I tried to weld them together initially but when they fell, they rotated in opposite directions. I have figured that a revolute joint is probably what I am after. The problem is that I can't figure out a way to attach them right where they collide. Using code from iforce2d: b2RevoluteJointDef revoluteJointDef; revoluteJointDef.bodyA = m_body; revoluteJointDef.bodyB = m_e->m_body; revoluteJointDef.collideConnected = true; revoluteJointDef.localAnchorA.Set(0,0);//the top right corner of the box revoluteJointDef.localAnchorB.Set(0,0);//center of the circle b2RevoluteJoint m_joint = *(b2RevoluteJoint*)m_game->m_world->CreateJoint( &revoluteJointDef ); m_body->SetLinearVelocity(m_e->m_body->GetLinearVelocity()); This attaches them but in the center of both of their points. Does anyone know how I would go about getting the exact point of collision so I can link these? Is this even the right method of doing this? Update: I have the exact point of collision. But I still am not sure this is even the method I want to go about this. Really, I just want to attach body A to B and have body B unaffected in any way.

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• Input handling between game loops

  - by user48023

  This may be obvious and trivial for you but as I am a newbie in programming I come with a specific question. I have three loops in my game engine which are input-loop, update-loop and render-loop. Update-loop is set to 10 ticks per second with a fixed timestep, render-loop is capped at around 60 fps and the input-loop runs as fast as possible. I am using one of the Javascript frameworks which provide such things but it doesn't really matter. Let's say I am rendering a tile map and the view of which elements are rendered depends on camera-like movement variables which are modified during key pressing. This is only about camera/viewport and rendering, no game physics involved here. And now, how can I handle input events among these loops to keep consistent engine reaction? Am I supposed to read the current variable modified with input and do some needed calculations in a update-loop and share the result so it could be interpolated in a render-loop? Or read the input effect directly inside the render-loop and put needed calculations inside? I thought interpreting user input inside an update-loop with a low tick rate would be inaccurate and kind of unresponsive while rendering with interpolation in the final view. How it is done properly in games overall?

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• Wine / PlayOnLinux dependency issues when trying to install

  - by Glutanimate

  I am curious as to why installing PlayOnLinux entails removing seemingly unrelated packages like google-earth-stable. Is this the expected behaviour? This is the output I get when trying to install playonlinux through apt-get: The following packages were automatically installed and are no longer required: python-scour pax ncurses-term Use 'apt-get autoremove' to remove them. The following extra packages will be installed: binfmt-support fonts-horai-umefont fonts-unfonts-core libcapi20-3 libgif4:i386 libmpg123-0 libodbc1 libpam-winbind ttf-umefont ttf-unfonts-core unixodbc winbind wine wine-gecko1.4 wine-gecko1.4:i386 wine1.4 wine1.4-amd64 wine1.4-common wine1.4-i386:i386 winetricks Suggested packages: libmyodbc odbc-postgresql tdsodbc unixodbc-bin dosbox Recommended packages: gettext:i386 unixodbc:i386 The following packages will be REMOVED: alien cdbs debhelper dh-make dh-translations gettext google-earth-stable intltool intltool-debian lsb-core po-debconf The following NEW packages will be installed: binfmt-support fonts-horai-umefont fonts-unfonts-core libcapi20-3 libgif4:i386 libmpg123-0 libodbc1 libpam-winbind playonlinux ttf-umefont ttf-unfonts-core unixodbc winbind wine wine-gecko1.4 wine-gecko1.4:i386 wine1.4 wine1.4-amd64 wine1.4-common wine1.4-i386:i386 winetricks 0 upgraded, 21 newly installed, 11 to remove and 0 not upgraded. Need to get 145 MB of archives. After this operation, 275 MB of additional disk space will be used. This is the first time I am trying to install Wine / POL. I am using the default repositories, no Wine PPA or POL source added. These are all the PPAs I am using: How do I install POL / Wine without having to remove all these packages?

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• Quaternion Camera

  - by Alex_Hyzer_Kenoyer

  Can someone help me figure out how to use a Quaternion with the PerspectiveCamera in libGDX or in general? I am trying to rotate my camera around a sphere that is being drawn at (0,0,0). I am not sure how to go about setting up the quaternion correctly, manipulating it, and then applying it to the camera. Edit: Here is what I have tried to do so far. // This is how I set it up Quaternion orientation = new Quaternion(); orientation.setFromAxis(Vector3.Y, 45); // This is how I am trying to update the rotations public void rotateX(float amount) { Quaternion temp = new Quaternion(); temp.set(Vector3.X, amount); orientation.mul(temp); } public void rotateY(float amount) { Quaternion temp = new Quaternion(); temp.set(Vector3.Y, amount); orientation.mul(temp); } public void updateCamera() { // This is where I am unsure how to apply the rotations to the camera // I think I should update the view and projection matrices? camera.view.mul(orientation); ... }

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• Running CRON job on Ubuntu server for SugarCRM

  - by Logik

  I am pretty inexperienced in Linux, so be descriptive on your answer. My environment: Local Linux server 12.04 hosting Sugar CRM 6.5.2. There is area in sugar CRM called scheduler. I can configured some predefined jobs here. in my case i am trying to run email reminders (ever min/hour/day/month). For this scheduler to be effective, i read some where i need to setup CRON job. So I did some research & finally put following lines in CRONTAB for the root user, as per instructions given in sugarCRM. * * * * * cd /var/www/crm; php -f cron.php > /dev/null 2>&1 Well I am creating contracts in my sugarCRM (AOS module) & I want email reminders to be sent for these contracts to the concern person. Now my sugarCRM email is configured correctly & I can send test emails using it. But the CRON + scheduler not giving any result. I can't receive any emails. Then I tried to read /var/log/syslog & it is showing entry for following line each minute. Oct 27 15:03:01 unicomm CRON[28182]: (root) CMD (cd /var/www/crm; php -f cron.php /dev/null 2&1) I've few questions: what does the CRON job line i've added in crontab mean? cd /var/www/crm; php -f cron.php > /dev/null 2>&1 is not making any sense to me. How am i suppose to get this thing work? I've searched a lot (including SugarCRM forum), but no luck.

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• Ubuntu 12.04 LTS loops the login screen unless you login as Guest

  - by Mário Silva

  I am running a VMWare Player with a Ubuntu 12.04 LTS Precise Pangloin as Guest on my Windows 7. Sometimes I get the shutdown blue screen error in Windows, this time it happened when I was running the Player. When I restarted everything Ubuntu gave the not so unfamiliar in this forum Login Loop in adminstrator login. I login and there's this black screen where I can only read: "piix4...smbus:0.0.0.07.3 Host Smbus controller not enabled" . When I go to the Prompt in root mode it fails to update and only upgraded, specially some plugins ( I think graphic plugins) which also appear in one an error message after quitting the prompt, but they´are successfully installed. They are not the error message. After that I have been working with the Fail/safe Mode recovery panel. When I try to update via Root I get errors like this: W:failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/release.gpg could not resolve 'extras/ubuntu.com There are 8 more like this referring to areas like: -archive/canonical.com -ppa.Launchpad.net -security.Ubuntu.com -Us.archive.ubuntu.com - release.gpg precise-updates/release.gpg precise_backport/release.gpg Final Message: some index files failed to download.....they have been ignored or old files are used. The black screens most of the time pass by too fast for me to pick up any information. But in general I think I have done everything I was able to in the recovery panel including updating network and graphic packages and recovering filesystem packages and the basic stuff ( I am a beginner regarding Linux ) in the root prompt. Now I am stuck in this screen with graphic options: - Run in low-graphics mode just for one session - Reconfigure Graphics - Troubleshoot the error - Exit to console login I am trying to choose to reconfigure graphics but the mouse disappears in the virtual machine screen and sometimes when options change ity´s only the first and last option. ut this happens from the blue without messages. This particular option menu is in the regular GUI style against a black screen in Terminal style. Really strange. Thanx in advance, all is welcome and appreciated.

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• What to think about when designing a simple GUI for a quiz game

  - by PeterK

  I am coming close to finish my first iPhone game ever, as a matter of fact also my first programming experience ever, which is a quiz game. I have all the functionality i want and is currently polishing it both from a code point of view as well as looking at the GUI. My initial idea was not to use any specific graphics but rather focus on the game experience and simplicity and by that only using background color, orange, and white text as well as buttons. The design is based on that all ages, from learning to read, should be able to host and play this game. However, as i am now getting close to the finish line i am starting to think what is needed from a GUI point of view. I would like to ask for some advice what to think about when designing a GUI. Is it considered OK without any 'fancy' graphics, what is the risk without it etc.? Also, what colors goes well together if i choose to use a simple GUI. I am thinking about color blindness etc. In other words how do i design a good and effective GUI for a simple game as mine? Thanks

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• Should programmers itemize testing for projects? [on hold]

  - by Patton77

  I recently hired a programming team to do a port of my iPad app to the iPhone and Android platforms. Now, in a separate contract, I am asking them to implement a bunch of tips on how to play the app, similar like you would find in Candy Crush or Cut the Rope. They want to charge 12 hours @ $35/hr for the "Testing all of the Tips", telling me that normally it would take them more than 25 hours but that they will 'bear the difference'. I am not familiar with this level of itemization, but maybe it's a new practice? I am used to devs doing their own quality control, and then having a testing/acceptance period. They are using Cocos 2D-X, and they say that the tips going to multiple platforms makes all of the hours jack up. I feel like they might be overcharging, and it's difficult for me to know because it's kind of like with a mechanic. "It took us 5 hours to replace the radiator". How can you dispute that? It seems to me that most of you would charge for the work but NOT for hours that you are 'testing'. Am I missing something? Thanks for any help and advice you can give!

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• Should programmers itemize testing in testing? [on hold]

  - by Patton77

  I recently hired a programming team to do a port of my iPad app to the iPhone and Android platforms. Now, in a separate contract, I am asking them to implement a bunch of tips on how to play the app, similar like you would find in Candy Crush or Cut the Rope. They want to charge 12 hours @ $35/hr for the "Testing all of the Tips", telling me that normally it would take them more than 25 hours but that they will 'bear the difference'. I am not familiar with this level of itemization, but maybe it's a new practice? I am used to devs doing their own quality control, and then having a testing/acceptance period. They are using Cocos 2D-X, and they say that the tips going to multiple platforms makes all of the hours jack up. I feel like they might be overcharging, and it's difficult for me to know because it's kind of like with a mechanic. "It took us 5 hours to replace the radiator". How can you dispute that? It seems to me that most of you would charge for the work but NOT for hours that you are 'testing'. Am I missing something? Thanks for any help and advice you can give!

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• Websockets through Stunnel is giving random bytes.

  - by user16682

  I have several servers set up for a web application that I am developing. One is a load balancing server, and I'm running a php WebSockets server on this balancer. The website that I am developing on uses ssl, so I have my WebSockets running through a wss uri connecting directly to the balancer, where I have set up stunnel4 to decrypt all traffic at a certain port and re-rout it to my php WebSockets server. This works fine when it comes down to connecting to my server. That's not the problem. The problem occurs when I try to send data to the server. Occasionally when I try this, stunnel does not appear to be decrypting the data properly. I get garbage characters in my termanal running the server: what appear to be completely random bytes. This can sometimes go on for several consecutive messages that I send before abruptly working again. It is very erratic and unpredictable. Sometimes I refresh the page, and all the messages work perfectly. Sometimes the WebSocket connects and I have to wait 5-10 seconds before any messages I send are interpreted properly by the server. Other times I can't send any messages at all, because they all end up as garbage. I believe this is a stunnel problem, but I am not certain. Does anybody have any experience with this? I would like a more predictable server if I can get it. Some more information: This occurs extensively in Chrome, not quite as much in FireFox, and never in Safari. The php server I am using is phpws http://code.google.com/p/phpws/ -- On the WebSocket connection, this server would sometimes detect that the header was only 1 byte in size, the first byte of the WebSockets header. I had to modify the server to flush the buffer ever time this occurred so that it would reliably connect.

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• What is up with the Joy of Clojure 2nd edition?

  - by kurofune

  Manning just released the second edition of the beloved Joy of Clojure book, and while I share that love I get the feeling that many of the examples are already outdated. In particular, in the chapter on optimization the recommended type-hinting seems not to be allowed by the compiler. I don't know if this was allowable for older versions of Clojure. For example: (defn factorial-f [^long original-x] (loop [x original-x, acc 1] (if (>= 1 x) acc (recur (dec x) (*' x acc))))) returns: clojure.lang.Compiler$CompilerException: java.lang.UnsupportedOperationException: Can't type hint a primitive local, compiling:(null:3:1) Likewise, the chapter on core.logic seems be using an old API and I have to find workarounds for each example to accommodate the recent changes. For example, I had to turn this: (logic/defrel orbits orbital body) (logic/fact orbits :mercury :sun) (logic/fact orbits :venus :sun) (logic/fact orbits :earth :sun) (logic/fact orbits :mars :sun) (logic/fact orbits :jupiter :sun) (logic/fact orbits :saturn :sun) (logic/fact orbits :uranus :sun) (logic/fact orbits :neptune :sun) (logic/run* [q] (logic/fresh [orbital body] (orbits orbital body) (logic/== q orbital))) into this, leveraging the pldb lib: (pldb/db-rel orbits orbital body) (def facts (pldb/db [orbits :mercury :sun] [orbits :venus :sun] [orbits :earth :sun] [orbits :mars :sun] [orbits :jupiter :sun] [orbits :saturn :sun] [orbits :uranus :sun] [orbits :neptune :sun])) (pldb/with-db facts (logic/run* [q] (logic/fresh [orbital body] (orbits orbital body) (logic/== q orbital)))) I am still pulling teeth to get the later examples to work. I am relatively new programming, myself, so I wonder if I am naively looking over something here, or are if these points I'm making legitimate concerns? I really want to get good at this stuff like type-hinting and core.logic, but wanna make sure I am studying up to date materials. Any illuminating facts to help clear up my confusion would be most welcome.

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• People's experience of Cloud Computing (using Force.com)

  - by Digger

  I would like to know about people's experience of working with APEX and the SalesForce.com platform, was it easy to work with? How similar to Java and C# is it? What did you like? What don't you like? Would you recommend it? Do you think cloud computing has a long term successful future? My reason for asking is that I am currently looking at a new position which involves working with APEX on the SalesForce.com platform. The position interests me but I just want to try and understand what I might be signing up for with regards the languages/platform as it is completely different from what I have worked with before. I have seen lots of videos/blog posts online (mainly from the recent Dreamforce event) and they obviously are very positive but I was just after some experiences from developers, both positive and negative. I find cloud computing a very interesting idea, but I am very new to the subject. The position I am looking at offers a fantastic opportunity but I was just after some opinions on APEX and the platform as I have no real world experience just what I have seen from the online videos. I guess ultimately what I am asking is: Are APEX and the SalesForce.com platform good to get involved in? Is development on the Force.com just a "career dead end"? Is cloud computing just a fad? Or does it have a long term future? Apologies in advance if this is the wrong place to ask such a question. Thanks

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• DNS NAmeserver Aname and cname records

  - by David

  Hi - I am inexperienced in the configuration of DNS and have an issue with dominan hosting set up. I have two domains 'www.mydomain1.com' and 'www.mydomain2.com', with mydomain2 pointed at the same place as mydomain1. The domains were passed to me recently by the person who previoulsy controlled them. I have an account with fasthosts in the uk. When I accepted the domains I could not access the DNS settings and enquired with fasthosts as to why. The replied saying 'The delegate hosting option for both domains were enabled and this is the reason why you were unable to find the option to edit the advanced DNS records. I have now disabled the delegate hosting option so you can now edit the advanced DNS records for both domains in your account.' When i log into the fasthost control panel now i can access the DNS controls but both domains have no A Record of Cname record set up. I am concerned that fasthosts have blatted the previous Nameserver entries and set me up on theirs but not added any record. 'www.mydomain1.com' currently still works but 'www.mydomain2.com' does not find the site anymore. i am worried i will lose mydomain1 to as teh dns changes filter through the system. my webhosting is at 'xxx.xxx.xxx.xxx/mydomain1.com/' and this is where I want both domains to point. Any advice would be much appreciated. one thing which is confusing me is that because I am on a shared server I have to put 'xxx.xxx.xxx.xxx/mydomain1.com/' to get to my site rather than just 'xxx.xxx.xxx.xxx'. The form on fasthosts for the aname record only allows an IP to be entered - does it add the mydomain1.com/ onto the end itself? Thanks for any help given - I'm quite worried about this David

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• Some problems after running ubuntu tweak application

  - by sachin

  I am a first time user of ubuntu 12.04 and must say that i am enjoying it. Somehow my skype on ubuntu is screwed up. The message that i am getting says (Disk IO error). Did any one face the problem before. Also i downloaded the ubuntu tweak application. After that application has clean some file, the application it self is not starting now.. I am quiet new to linux much and fear that if the tweak application has cleaned some files which were necessary. Is there anything i can fix these problems or short of auto-recovery, i have got some more leads: here seems to be the error but not sure how can i fix this. buntu-tweak:2887): Gtk-WARNING **: Locale not supported by C library. Using the fallback 'C' locale. Traceback (most recent call last): File "/usr/bin/ubuntu-tweak", line 122, in from ubuntutweak.main import UbuntuTweakWindow File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 40, in from ubuntutweak.preferences import PreferencesDialog File "/usr/lib/python2.7/dist-packages/ubuntutweak/preferences.py", line 32, in from ubuntutweak.factory import WidgetFactory File "/usr/lib/python2.7/dist-packages/ubuntutweak/factory.py", line 24, in from ubuntutweak.gui.widgets import * File "/usr/lib/python2.7/dist-packages/ubuntutweak/gui/widgets.py", line 10, in from ubuntutweak.settings.compizsettings import CompizSetting File "/usr/lib/python2.7/dist-packages/ubuntutweak/settings/compizsettings.py", line 3, in import ccm File "/usr/lib/python2.7/dist-packages/ubuntutweak/settings/ccm/init.py", line 1, in from Conflicts import * File "/usr/lib/python2.7/dist-packages/ubuntutweak/settings/ccm/Conflicts.py", line 25, in from Constants import * File "/usr/lib/python2.7/dist-packages/ubuntutweak/settings/ccm/Constants.py", line 77, in locale.setlocale(locale.LC_ALL, "") File "/usr/lib/python2.7/locale.py", line 539, in setlocale return _setlocale(category, locale) locale.Error: unsupported locale setting

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• Learning Objective-C for iPad/iPhone/iPod Development

  - by Jeff Julian

  I am learning how to write apps for the iPad/iPhone/iPod!  Why, well several reasons.  One reason, I have 5 devices in my house on the platform.  I had an iPad and iPhone, Michelle has an iPhone, and each of the kids have iPod Touches.  They are excellent devices for life management, entertainment, and learning.  I am amazed at how well the kids pick up on it and how much it effects the way they learn.  My two year old knows how to use it better than any other device we own and she is learning new words and letters so quickly. Because of this saturation at home, it would be fun to write some apps my family could use.  Some games to bring the hobby of development back into my life.  Second reason is we want to have a Geekswithblogs app for the iPhone and iPad.  We are not sure if it is purely informational (blog posts and tweets) or if members want to be able to publish from the app.  Creating a blog editor would be tough stuff, but could be just the right challenge. There are so many more reasons, but the last one that really makes me excited is that it is a new domain of development where I get excited when I think about writing apps.  That excitement level where I want to see if there are User Groups and if we are just watching TV, to break out the MBP and start working on it.  That excitement level where I could really read a development book cover to cover and not just use as a reference.  I really do like this feeling. Who knows how long this will last and I am definitely not leaving .NET.  Microsoft software will always be my main focus, but for the time, my hobby is changing and I am getting excited about development again.   Technorati Tags: Apple,iPad Development,Objective-C,New Frontiers Image: Courtesy of Apple

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• Creating java package on ubuntu?

  - by Gaurav_Java

  I am new to java. Here I am trying to create java package. And try to compile it from another directory . But there is an error like bash: /home/gaurav/Desktop/package2/B.java: Permission denied Here is fy first code and directory is /home/Desktop/package/A.java package package1; public class A { interface A1 { void show(); void display(); } } class B extends A { public void show() { System.out.println("This is show method()"); } public void display() { System.out.println("this is Display metthod()"); } } For compilation I did this command it's works fine. pwd is /home/gaurav javac /home/gaurav/Desktop/package/A.java When I try to compile B.java which is in my Other drive /media/gaurav/iPlay/package/B.java package package2; class B { public static void main(String args[]) { System.out.println("Reached in Main method of B"); package1.A Object = new A(); } } I tired this vommand (grom previous working directory) javac -cp /home/gaurav/Desktop/;/media/gaurav/iPlay/package/B.java Error Comes javac -cp /home/gaurav/Desktop/;/media/gaurav/iPlay/package/B.java javac: no source files Usage: javac <options> <source files> use -help for a list of possible options bash: /media/gaurav/iPlay/package/B.java: Permission denied What i am doing wrong? Please it my assignment I am not able to move further without this. I changed permissions.

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• Architecture design with MyBatis mappers

  - by Wolf

  I am creating rest web service for providing data. I am using Spring MVC for handling rest requests, and MyBatis for data access. Application should be designed in the way that it should be easy to change the data access implementation (for example to hibernate or something else) and it has to be fast (so I am trying to avoid unnecessary overcomplication of design). Now my question is about the general design of layers. I would normally use DAO interface and then different implementations for different data access strategies, but MyBatis uses interfaces to access the data. So I can think of 2 possible models but I am not sure which one is better or if there is any other nice way: Controller layer - uses Service layer interfaces services are then implemented for each data access stretegy - for example for mybatis: service implementation uses Mapper classes to access data and do whatever it needs to do with them and sends them to controller layer Controller layer - uses Service layer - service layer uses DAO interfaces DAOs are then implemented for each data access strategy - for example for mybatis: DAO class uses mapper interface to access data and sends them to service layer, service layer then do whatever it needs to do with them and sends them to controller layer I prefer the first strategy as it seems to be less complicated, but then I would have to write all of the service code for another data access again. What do you think? Thank You

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• Developing professionally for iOS, Android and web - an insight

  - by Scott Roberts

  This is not really a question on how to develop all three, I know various cross platform ways and so on. But I more want to know from developer standpoint how hard it is to basically develop iOS, Android and web apps? I am currently in my first job as a mobile/web developer. I have already developed my first iPhone/iPad app and now I have to develop the app for android because the web version I tried just didn't perform as well as needed and web databases just did not seem to make the cut. But I am not sure it's possible to be good at developing all 3 in terms of remembering all the api's etc. I wouldn't say I have an issue with the programming languages just how to use the api's for the various platforms. Also, all the other languages I look at, in my spare time, just feel like I am spreading myself to thin. Is it feasible for one person to be developing ios, android and web apps? Should I think about reducing it to iOS and web based apps? I develop everything by myself, so I have no one to discuss what the best solutions are for everything and I am just trying to workout as I go along. So any cross platform developers out there? Do companies have different teams for different platforms? Any insight would just help me get my head together. Hopefully this question makes sense.

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• How to access an encrypted INI file from C on an embedded system with little RAM

  - by Mawg

  I want to encrypt an INI file using a Delphi program on a Windows PC. Then I need to decrypt & access it in C on an embedded system with little RAM. I will do that once & fetch all info; I will not be consutinuously accessing the INI file whenever my program needs data from the file. Any advice as to which encryption to use? Nothing too heavyweight, just good enough for "Security through obscurity" and FOSS for both Delphi & C. And how can I decrypt, get all the info from the INI file - using as little RAM as possible, and then free any allocated RAM? I hope that someone can help. [Update] I am currently using an Atmel UC3, although I am not sure if that will be the final case. It has 512kB falsh & 128kB RAM. For an INI file, I am talking of max 8 sections, with a total of max 256 entries, each max 8 chars. I chose INI (but am not married to it), because i have had major problems in the past when the format of a data fiel changes, no matter whether binary, or text. For tex, I prefer the free format of INI (on PC), but suppose I could switch to line_1=data_1, line_2=data_2 and accept that if I add new fields in future software erleases they must come at the end, even if it is not pretty when read directly by humans. I suppose if I choose a fixed format text file then I never need get more than one line into RAM at a time ...

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• Everybody's Heard About the Bird: OTN ArchBeat Top Tweets for June 2013

  - by Bob Rhubart

  Your clicks count! Here at the Top 10 most popular tweets for June 2013 from @OTN ARchBeat on Twitter. Oracle #SOA Suite 11g Developers Cookbook Published | Antony Reynolds Jun 28, 2013 at 12:25 PM Notes on Oracle #BPM PS6 Adaptive Case Management | Graeme Colman Jun 24, 2013 at 11:55 AM Calling #ADF BC Web Service from #BPM Process | @AndrejusB Jun 24, 2013 at 12:12 PM ZDNet's @JoeMcKendrick interviews #SOA guru and author Thomas Erl (@soaschool). Jun 25, 2013 at 08:33 AM Two Weeks and counting: OTN Architect Day: Cloud Computing - July 9 - Redwood Shores, CA. Registration is free. Jun 25, 2013 at 06:00 PM Changing #WebLogic Server Deployment Order using #MBeans | @ArtofBI Jun 24, 2013 at 12:07 PM Getting Started with #WebCenter Portal — Content Contribution Project — Part 2 | Husain Dalal #fusionmiddleware Jun 24, 2013 at 09:58 AM Your next boss may not be the CIO, or any other IT manager for that matter | ZDNet Jun 25, 2013 at 02:00 PM Single Sign-On with Security Assertion Markup Language between Oracle and SAP | Ronaldo Fernandes Jun 26, 2013 at 04:08 PM RT @oracletechnet: It's Not TV, It's OTN: Top 10 Videos on the OTN YouTube Channel Jun 27, 2013 at 09:06 AM Thought for the Day "At some point you have to decide whether you're going to be a politician or an engineer. You cannot be both. To be a politician is to champion perception over reality. To be an engineer is to make perception subservient to reality. They are opposites. You can't do both simultaneously. " — H. W. Kenton Source: softwarequotes.com

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• Entity Object Based on PL/SQL

  - by Manoj Madhusoodanan

  This blog describes how to create a PL/SQL based Entity Object.Oracle application has number of APIs and each API will perform numerous number of tasks.We can create PL/SQL based EO which will directly invoke the PL/SQL stored procedure from the EO. Here I am demonstrating using a standard API FND_USER_PKG.CREATEUSER.This API has x_user_name and x_owner as mandatory parameter.My task is to create a user through OAF page which will accept User Name and Password. Following steps needs to be performed to achieve the above scenario. 1) Create FndUserEO as follows Include all the API parameters and WHO columns in the EO. Make UserName and EncryptedUserPassword ( Here I am not using Encrypted Password. The column name is same as table column so I am keeping the same) column as mandatory. Generate VO. 2) Edit FndUserEOImpl and add the following 3) Attach FndUserVO to AM 4) Create the UI 5) Deploy following files to middle tier and restart the server.  Entity Object: xxcust.oracle.apps.fnd.user.schema.server.FndUserEO.xml xxcust.oracle.apps.fnd.user.schema.server.FndUserEOImpl.java View Object: xxcust.oracle.apps.fnd.user.server.FndUserVO.xml xxcust.oracle.apps.fnd.user.server.FndUserVOImpl.javaUser Interface: xxcust.oracle.apps.fnd.user.webui.CreateFndUserCO.java xxcust.oracle.apps.fnd.user.webui.CreateFndUserPG.xmlYou can test by giving User Name and Password.

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• Installation of Tex Live via the terminal 12.04

  - by user74713

  I need to install upstream version of TeX Live for 12.04 to edit the manual for Ubuntu. I am having a difficult time installing it per the directions @ http://ubuntu-manual.org/getinvolved/editors#install-texlive. TeX Live documents are on my computer, but I am not able to run the install. No TeX Live program found on my computer. Any help is greatly appreciated! ~Thanx!~ Hello, my name is Chris. I am a student pursuing a career in technical writing. I would like to assist the Ubuntu community while gaining experience & building my resume. Below I have listed the prior attempts & links to view the posts of each attempt: Backports I have tried using the official backports of the latest (2012) TeX-Live via their PPA. Please refer to link below for the particulars. How do I install the latest 2012 TeX Live on 12.04? Latex I've also tried running Latex as suggested. Please refer to link below for the particulars. http://ubuntuforums.org/showthread.php?t=2019051 PPA Causing Issue?? or something else I came across a post concerning the ability to install programs via the terminal and am wondering if it may be my problem??? Please refer to link below for the particulars. PPA - TeX Live Cannot install anything through Terminal - apt-get -f install

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• DAO/Webservice Consumption in Web Application

  - by Gavin

  I am currently working on converting a "legacy" web-based (Coldfusion) application from single data source (MSSQL database) to multi-tier OOP. In my current system there is a read/write database with all the usual stuff and additional "read-only" databases that are exported daily/hourly from an Enterprise Resource Planning (ERP) system by SSIS jobs with business product/item and manufacturing/SCM planning data. The reason I have the opportunity and need to convert to multi-tier OOP is a newer more modern ERP system is being implemented business wide that will be a complete replacement. This newer ERP system offers several interfaces for third party applications like mine, from direct SQL access to either a dotNet web-service or a SOAP-like web-service. I have found several suitable frameworks I would be happy to use (Coldspring, FW/1) but I am not sure what design patterns apply to my data access object/component and how to manage the connection/session tokens, with this background, my question has the following three parts: Firstly I have concerns with moving from the relative safety of a SSIS job that protects me from downtime and speed of the ERP system to directly connecting with one of the web services which I note seem significantly slower than I expected (simple/small requests often take up to a whole second). Are there any design patterns I can investigate/use to cache/protect my data tier? It is my understanding data access objects (the component that connects directly with the web services and convert them into the data types I can then work with in my Domain Objects) should be singletons (and will act as an Adapter/Facade), am I correct? As part of the data access object I have to setup a connection by username/password (I could set up multiple users and/or connect multiple times with this) which responds with a session token that needs to be provided on every subsequent request. Do I do this once and share it across the whole application, do I setup a new "connection" for every user of my application and keep the token in their session scope (might quickly hit licensing limits), do I set the "connection" up per page request, or is there a design pattern I am missing that can manage multiple "connections" where a requests/access uses the first free "connection"? It is worth noting if the ERP system dies I will need to reset/invalidate all the connections and start from scratch, and depending on which web-service I use might need manually close the "connection/session"

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• Design for XML mapping scenarios between two different systems [on hold]

  - by deepak_prn

  Mapping XML fields between two systems is a mundane routine in integration scenarios. I am trying to make the design documents look better and provide clear understanding to the developers especially when we do not use XSLT or any other IDE such as jDeveloper or eclipse plugins. I want it to be a high level design but at the same time talk in developer's language. So that there is no requirements that slip under the crack. For example, one of the scenarios goes: the store cashier sells an item, the transaction data is sent to Data management system. Now, I am writing a functional design for the scenario which deals with mapping XML fields between our system and the data management system. Question : I was wondering if some one had to deal with mapping XML fields between two systems? (without XSLT being involved) and if you used a table to represent the fields mapping (example is below) or any other visualization tool which does not break the bank ? I am trying to find out if there is a better way to represent XML mapping in your design documents. The widely accepted and used method seems to be using a simple table such as in the picture to illustrate the mapping. I am wondering if there are alternate ways/ tools to represent such as in Altova:

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