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• How can I triple boot Xubuntu, Ubuntu and Windows?

  - by ag.restringere

  Triple Booting Xubuntu, Ubuntu and Windows I'm an avid Xubuntu (Ubuntu + XFCE) user but I also dual boot with Windows XP. I originally created 3 partitions and wanted to use the empty one as a storage volume but now I want to install Ubuntu 12.04 LTS (the one with Unity) to do advanced testing and packaging. Ideally I would love to keep these two totally separate as I had problems in the past with conflicts between Unity and XFCE. This way I could wipe the Ubuntu w/ Unity installation if there are problems and really mess around with it. My disk looks like this: /dev/sda1 -- Windows XP /dev/sda2 -- Disk /dev/sda: 200.0 GB, 200049647616 bytes 255 heads, 63 sectors/track, 24321 cylinders, total 390721968 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Device Boot Start End Blocks Id System /dev/sda1 * 63 78139454 39069696 7 HPFS/NTFS/exFAT /dev/sda2 78141440 156280831 39069696 83 Linux /dev/sda3 156282878 386533375 115125249 5 Extended /dev/sda4 386533376 390721535 2094080 82 Linux swap / Solaris /dev/sda5 156282880 386533375 115125248 83 Linux Keep each in it's own partition and totally separate and be able to select from each of the three systems from the GRUB boot menu... sda1 --- [Windows XP] sda2 --- [Ubuntu 12.04] "Unity" sda3(4,5) -- [Xubuntu 12.02] "Primary XFCE" What is the safest and easiest way to do this without messing my system up and requiring invasive activity?

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• How to convince a client to switch to a framework *now*; also examples of great, large-scale php applications.

  - by cbrandolino

  Hi everybody. I'm about to start working on a very ambitious project that, in my opinion, has some great potential for what concerns the basic concept and the implementation ideas (implementation as in how this ideas will be implemented, not as in programming). The state of the code right now is unluckily subpar. It's vanilla php, no framework, no separation between application and visualization logic. It's been done mostly by amateur students (I know great amateur/student programmers, don't get me wrong: this was not the case though). The clients are really great, and they know the system won't scale and needs a redesign. The problem is, they would like to launch a beta ASAP and then think of rebuilding. Since just the basic functionalities are present now, I suggested it would be a great idea if we (we're a three-people shop, all very proficient) ported that code to some framework (we like CodeIgniter) before launching. We would reasonably be able to do that in < 10 days. Problem is, they don't think php would be a valid long-term solution anyway, so they would prefer to just let it be and fix the bugs for now (there's quite a bit) and then directly switch to some ruby/python based system. Porting to CI now will make future improvements incredibly easier, the current code more secure, changing the style - still being discussed with the designers - a breeze (reminder: there are database calls in template files right now); the biggest obstacle is the lack of trust in php as a valid, scalable technology. So well, I need some examples of great php applications (apart from facebook) and some suggestions on how to try to convince them to port soon. Again, they're great people - it's not like they would like ruby cause it's so hot right now; they just don't trust php since us cool programmers like bashing it, I suppose, but I'm sure going on like this for even one more day would be a mistake. Also, we have some weight in the decision process.

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• What are some good courses to take my programming to the next level?

  - by absentx

  I am in search of either some in person, or online training that could take my coding to the next level. I am looking to attack two specific areas: Javascript: While I have been getting by with javascript for three or four years, I still feel like it takes a back seat to my other programming. I use Jquery a lot but would prefer to be proficient in pure JS also. PHP: I feel pretty proficient at PHP but I know there is only room to improve. Here I am interested in something that can teach me the more advanced aspects of the language, improve my code writing and perhaps cover object oriented php in depth also. I have looked into Netcom's training courses before but I can't tell if there advanced webmaster professional would be a good fit or not. Seems kind of like a force fed course but I am interested in it because I am looking for something in the one to two week range that is targeted at what I am looking for. I have zero experience with any type of online courses in terms of programming. It appears lots are available, but I am not sure on the quality.

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• Why isn't my other two constant buffers being updated to the shader?

  - by Paul Ske

  I posted previously before about my two dynamic buffers not being dynamically updating the constant shader. The tessellation buffer isn't working because I have to manually update the tessellation factor inside the hull shader. I believe the camera position isn't updating either because when I perform distance adaptation the far edges are more tessellated then the what's truly in front of the camera. I have all the buffers set to dynamic. Inside the render loop I have them set as: ID3D11Buffer *multiBuffers[3]; devcon->VSSetConstantBuffers(0,3,multiBuffers); ... devcon->DSSetConstantBuffers(0,3,multiBuffers); I only got that from a directX Sample. Inside the shader file I have the three cbuffer structs. cbuffer ConstantBuffer { float4x4 WorldMatrix; float4x4 viewMatrix; float4x4 projectionMatrix; float4x4 modelWorldMatrix; // the rotation matrix float3 lightvec; // the light's vector float4 lightcol; // the light's color float4 ambientcol; // the ambient light's color bool isSelected; } cbuffer cameraBuffer { float3 cameraDirection; float padding; } cbuffer TessellationBuffer { float tessellationAmount; float3 padding2; } Am I missing something or would anyone know why wouldn't my buffers update to the shader file?

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• Joomla: Cross site link boxes

  - by Dean Smith

  I am currently evaluating Joomla for use on the the rebuild of our corporate website. One of the features our designs have is spaces for what we've been calling widgets. These widgets include common ones for each page, contact us boxes, section navigation, that all seem pretty easy to implement. The other widgets we would us to highlight specific pages within the site relevant to the one you are on, and are therefore different for each article. We've called these link widgets and these are a pretty common site on many websites. I'm honestly at a bit of a loss as to how to do this with Joomla. From a CMS perspective I'd like to allow users to just select which three link widgets they want when editing the article and have some way of creating the widgets within the CMS as well. Editing the link widget would allow setting a title, a bit of text and selecting the page that it links to. Am I going to be able to do this with Joomla, and if I can roughly how to I go about it ?

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• The 2012 JAX Innovation Awards

  - by Janice J. Heiss

  A new article, now up on otn/java, titled “The 2012 JAX Innovation Awards” reports on  important Java developments celebrated by the Awards, which were announced in July of 2012. The Awards, given by S&S Media Group, aim to, "Reward those technologies, companies, organizations and individuals that make outstanding contributions to Java." The Awards fall into three categories: Most Innovative Java Technology, Most Innovative Java Company, and Top Java Ambassador. In addition, a finalist who did not win an award receives a Special Jury prize, "in acknowledgement of their unique contribution and positive impact on the Java ecosystem."The winners were: JetBrains for Most Innovative Java Company; Adam Bien as Top Java Ambassador; Restructure 101, created by Headway Software, as Most Innovative Technology; and Charles Nutter, Special Jury award. Each winner received a $2,500 prize. The five finalists in each category were invited to attend the JAX Conference in San Francisco, California. This year's winners each received a $2,500 prize. JetBrains Fellow, Ann Oreshnikova, listed her favorite JetBrains innovations: * Nullability annotations and nullability checker* CamelCase navigation and completion* Continuous Integration in grid (on multiple agents), in TeamCity* IntelliJ Platform and its language support framework* MPS language workbench* Kotlin programming languageWhen asked what currently excites him about Java, Adam Bien, winner of the Java Ambassador Award, expressed enthusiasm over the increasing interest of smaller companies and startups for Java EE. “This is a very good sign,” he said. “Only a few years ago J2EE was mostly used by larger companies -- now it becomes interesting even for one-person shows. Enterprise Java events are also extremely popular. On the Java SE side, I'm really excited about Project Nashorn.”Special Jury Prize Winner, Charles Nutter of Red Hat, remarked that, “JRuby seems to have hit a tipping point this past year, moving from ‘just another Ruby implementation’ to ‘the best Ruby implementation for X,’ where X may be performance, scaling, big data, stability, reliability, security, and a number of other features important for today's applications. Check out the complete article here.

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• JavaOne LAD Call for Papers

  - by Tori Wieldt

  JavaOne LAD Call for Papers closes next Friday, October 4. Here are Java Evangelist Steven Chin's top three reasons why you submit a session:1) Imagine a parallel world where Java is king. Where the government has mandated that all software be open-source and recognized Java as an official platform. That is exactly what happened in Brazil and it shows in all aspects of their country from government systems to TV standards.2) A JUG in Every Village - Brazil has the most user groups of any country in the world by a significant margin. "I've stayed after JavaOne to visit several cities and gotten a great audience whether it was a large city like Brasilia or Goiania, or a coastal town like Fortaleza, Salvador, or Maceio," Chin explains.3) A Community-Supported Conference - SouJava and the entire Brazilian user group community is active and involved with JavaOne Brazil, making it a really engaging regional JavaOne conference. Submissions should be: From the community, all proposals should be non-Oracle. Java-related topics (not technologies such as Flex, .NET, Objective C, etc... unless it's specifically a topic about how such things INTEGRATE with Java) Non-product pitches Interesting/innovative uses of Java Practical relevant case studies/examples/practices/etc. The call for papers will close on Friday, October 4, 2012 at 11:59 pm local time. We look forward to hearing from you!

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• Will you choose JavaFX for Development?

  - by javafx4you

  A few weeks ago, a poll on the home page of java.net caught my eyes, because it was related to JavaFX. Its title: Will you use JavaFX for development once it's fully ported to Mac and Linux platforms? Usually, the results for this type of polls are published on the editor's Daily Blog soon after the poll closes. For some reason, this didn't happen for the JavaFX poll, so I'll take a shot at interpreting the results.  The results found on java.net look pretty close to the following: Although this way to look at the results already gives us an idea of how much traction JavaFX is getting, there are just too many type of answers that make it hard to read. The answers "maybe" and "I don't know" are awfully similar, so I'm tempted to collapse these together. Then there is "No, I don't do that type of development" that just doesn't belong here, as obviously developers who ave chosen this answer don't develop Rich Internet Apps, and therefore I will adapt the % results accordingly. Finally, I've been tempted to combine the top three categories just t simplify the results. This gives me the following chart:  Whether you prefer the original graph, or my simplified take on it, one thing is sure:  less than 10% of developers who have taken this poll plan to stick to another toolkit (presumably Swing or SWT), while the vast majority is inclined to use JavaFX. When you take into account that JavaFX 2.0 is pretty much a "new" API (no more JavaFX Script), I think these are some pretty good results, 6 months after the official release of JavaFX 2.0.

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• Importing an existing project into Git

  - by Andy

  Background During the course of developing our site (ASP.NET), we discovered that our existing source control (SourceGear Vault) wasn't working for us. So, we decided to migrate to Git. The translation has been less than smooth though. Our site is broken up into three environments DEV, QA, and PROD. For tho most part, DEV and the source control repo have been in sync with each other. There is one branch in the repo, if a page was going to be moved up to QA then the file was moved manually, same thing with stuff that was ready for PROD. So, our current QA and PROD environments do not correspond to any particular commit in the master branch. Clarification: The QA and PROD branches are not currently, nor have they ever been in source control. The Question How do I move QA and PROD into Git? Should I forget about the history we've maintained up to this point and start over with a new repo? I could start with everything on PROD, then make a branch and pull in everything from QA, and then make another branch off of that with DEV. That way not only will the branches reflect the differences in the environments, they'll be in the right order chronologically with the newest commits in the DEV branch. What I've tried so far I thought about creating a QA branch off of the current master and using robocopy to make the working folder look like the current QA environment. This doesn't work because the new commit from QA will remove new files from DEV and that will remove them when we merge up, I suspect there will be similar problems if I started QA at an earlier (though not exact) commit from DEV.

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• I need some career/education advice regarding computer science [on hold]

  - by user2521987

  So I'm a senior mathematics major this fall and I have only taken three CS classes (Java I, Java II, and C++). This summer, I am participating in a mathematics REU (Research Experience for Undergraduates), and I program in C++ about 8 hours a day...and I find that I absolutely love it. I love using programming to solve math problems in my research. I think I want to pursue a career in programming. I have a few options Stay at my university an extra 1-1.5 years (beyond the 4) and do a double major in Math/CS. This will put me in up to around 7-10k in debt (currently I have no debt and am scheduled to graduate debt free). Then apply to a masters in CS. Apply directly to a masters in CS from a math undergraduate degree. I don't like this idea because I likely won't get into a good program or funded with such little background. Go to graduate school, funded, in applied mathematics and try to further my knowledge in computer science while there. Then apply to a masters in CS. I'm not sure if 1 or 3 would be better. My end goal would be to go to a top 20-30 CS graduate program and to get a cool, good job. What would you recommend?

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• Is it possible to procure venture capital based on in-progress ideas? [migrated]

  - by Clay Shannon

  I hope this is not the wrong forum for this question, but I can't find one in the Stack Exchange "family" that would be more appropriate. I have ideas for two web sites which I think will be quite popular (they are totally unrelated to each other). I am a programmer, and a "creative" (photographer, author, musician). So I have the "vision" as well as the technical know-how to bring these websites into being. My "problem" is that I'm champing at the bit to complete them, and don't have much time to work on them (being employed fulltime, etc.) If I continue to work on them in my so-called spare time, it will probably be a year or more before they are both done. If I was in a position to work on them fulltime (IOW, if I had a "silent partner" willing to invest enough money that I could quit my job), I could have them complete in about three months. I would be willing to partner with somebody or some group who would back me financially in this way. My vision/work combined with their monetary investment could bring about "great things" or at least moderately great things. I know you can "crowd fund" startups and so on, but for that you need to expose your idea. My ideas are not something I would want to make public, as somebody might "steal" them. I'm willing to discuss them with serious individual potential investors, though (provided they were willing to sign a non-disclosure agreement). Does anybody have any recommendation on how I might find a suitable partner[s] for this/these ventures?

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• How to get Visual Studio 2010 Express Edition on Windows 7

  - by thanigai

  Visual studio 2010 is an amzing release from Microsoft. I have tried the beta 1,2 of Visual Studio 2010 and finally the full version is released. I am also interested in the latest edition of Windows which nothing but our Windows 7. Next to Vista I like this version very much. Out of curiosity I have installed the prebuild version of Windows 7. I tried installing the express edition here and it failed making me disappointed. I tried two or three times and finally I decided to download the trial version of Windows 7. After that I can install the Visual Studio 2010 express edition easily. I have given the link below from where I have downloaded the file. http://www.microsoft.com/express/downloads/ Here the link give is through Web PI Installer. Other option is you can download the ISO image file and burn them to a disc or use a virtual disc This Visual Web developer will provide the Sql Server engine alone. To get a Sql Server Management Studio get from the following link http://www.microsoft.com/express/Database/InstallOptions.aspx That's it all the things necessary for the web application programming is ready. Ah I forget to tell about the Silverlight. Please find the Silverlight 4 latest tools from the below link (WCF RIA services is the main update) http://www.silverlight.net/getstarted/ Silverlight 4 Tools(http://www.microsoft.com/downloads/details.aspx?FamilyID=eff8a0da-0a4d-48e8-8366-6ddf2ecad801&displaylang=en) Expression Blend 4 trial(http://www.microsoft.com/downloads/details.aspx?FamilyID=88484825-1b3c-4e8c-8b14-b05d025e1541&displaylang=en) I think the reader would have enjoyed on how to get these things. Please let me know if you are not clear with any of these things.  Thanks, Thani

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• Should I use a config file or database for storing business rules?

  - by foiseworth

  I have recently been reading The Pragmatic Programmer which states that: Details mess up our pristine code—especially if they change frequently. Every time we have to go in and change the code to accommodate some change in business logic, or in the law, or in management's personal tastes of the day, we run the risk of breaking the system—of introducing a new bug. Hunt, Andrew; Thomas, David (1999-10-20). The Pragmatic Programmer: From Journeyman to Master (Kindle Locations 2651-2653). Pearson Education (USA). Kindle Edition. I am currently programming a web app that has some models that have properties that can only be from a set of values, e.g. (not actual example as the web app data confidential): light-type = sphere / cube / cylinder The light type can only be the above three values but according to TPP I should always code as if they could change and place their values in a config file. As there are several incidents of this throughout the app, my question is: Should I store possibly values like these in: a config file: 'light-types' = array(sphere, cube, cylinder), 'other-type' = value, 'etc = etc-value a single table in a database with one line for each config item a database with a table for each config item (e.g. table: light_types; columns: id, name) some other way? Many thanks for any assistance / expertise offered.

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• Installing ubuntu 12.04 on macbook pro9,2

  - by stariz77

  I seem to have tried all the various suggested methods for installing ubuntu on a mbp, but can't seem to get anything that works and was wondering if anyone has run into any new problems with the latest non-retina models? I have a core i7 in my macbook, and model identifier is MacBookPro9,2. I have partitioned my HD using disk utility and have 700gig free space ready for the install (I haven't removed OSX Lion, it is still there in a 50gig partition). Problem: I am just getting a blank screen with a blinking cursor (unresponsive) in the top left whenever I boot from the disk. I left it for 20 minutes and nothing ever happened. This was without any boot manager, just holding "c" on startup. Attempted remedies: I have downloaded the 64 ubuntu iso from their site 3 times now and burned 4 separate discs to rule out some kind of corruption or burn error. I burned one in OSX Lion 10.7.4 and 3 on my windows 7 pc. I tried holding "alt" instead and then navigating to the windows disc to boot. Same thing happens, blank blinking unresponsive cursor. I also tried going to the EFI disc which actually brings up a menu (after saying "error prefix is not set") asking if I want to install ubuntu, test for errors or partition. All three options lead me to an unresponsive blank screen (some without cursors). I downloaded and installed rEFIt and if I hold "alt" on startup a linux penguin (Boot Linux from CD) appears in my boot options, along with the apple boot, and two others that I'm not sure of: "Boot EFI\boto\bootx64.efi from" and "Boot Legacy OS from". The "Boot Linux from CD" just takes me to the blank blinking cursor screen; again, I left if for 10+ minutes and nothing. I heard that the detection of the graphics card might be a problem and that I need change to nomodeset, but I have tried pressing F6 in all of the boot menus listed above and no options appear. Does anyone have any other suggested routes or can you see what I might have done wrong?

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• Exalogic Elastic Cloud Software (EECS) version 2.0.1 available

  - by JuergenKress

  We are pleased to announce that as of today (May 14, 2012) the Exalogic Elastic Cloud Software (EECS) version 2.0.1 has been made Generally Available. This release is the culmination of over two and a half years of engineering effort from an extended team spanning 18 product development organizations on three continents, and is the most powerful, sophisticated and comprehensive Exalogic Elastic Cloud Software release to date. With this new EECS release, Exalogic customers now have an ideal platform for not only high-performance and mission critical applications, but for standardization and consolidation of virtually all Oracle Fusion Middleware, Fusion Applications, Application Unlimited and Oracle GBU Applications. With the release of EECS 2.0.1, Exalogic is now capable of hosting multiple concurrent tenants, business applications and middleware deployments with fine-grained resource management, enterprise-grade security, unmatched manageability and extreme performance in a fully virtualized environment. The Exalogic Elastic Cloud Software 2.0.1 release brings important new technologies to the Exalogic platform: Exalogic is now capable of hosting multiple concurrent tenants, business applications and middleware deployments with fine-grained resource management, enterprise-grade security, unmatched manageabi! lity and extreme performance in a fully virtualized environment. Support for extremely high-performance x86 server virtualization via a highly optimized version of Oracle VM 3.x. A rich, fully integrated Infrastructure-as-a-Service management system called Exalogic Control which provides graphical, command line and Java interfaces that allows Cloud Users, or external systems, to create and manage users, virtual servers, virtual storage and virtual network resources. Webcast Series: Rethink Your Business Application Deployment Strategy Redefining the CRM and E-Commerce Experience with Oracle Exalogic, 7-Jun@10am PT & On-Demand: ‘The Road to a Cloud-Enabled, Infinitely Elastic Application Infrastructure’ (featuring Gartner Analysts). WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: ExaLogic Elastic Cloud,ExaLogic,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress,ExaLogic 2.0.1

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• Floating point undesirable in highly critical code?

  - by Kirt Undercoffer

  Question 11 in the Software Quality section of "IEEE Computer Society Real-World Software Engineering Problems", Naveda, Seidman, lists fp computation as undesirable because "the accuracy of the computations cannot be guaranteed". This is in the context of computing acceleration for an emergency braking system for a high speed train. This thinking seems to be invoking possible errors in small differences between measurements of a moving object but small differences at slow speeds aren't a problem (or shouldn't be), small differences between two measurements at high speed are irrelevant - can there be a problem with small roundoff errors during deceleration for an emergency braking system? This problem has been observed with airplane braking systems resulting in hydroplaning but could this actually happen in the context of a high speed train? The concern about fp errors seems to not be well-founded in this context. Any insight? The fp is used for acceleration so perhaps the concern is inching over a speed limit? But fp should be just fine if they use a double in whatever implementation language. The actual problem in the text states: During the inspection of the code for the emergency braking system of a new high speed train (a highly critical, real-time application), the review team identifies several characteristics of the code. Which of these characteristics are generally viewed as undesirable? The code contains three recursive functions (well that one is obvious). The computation of acceleration uses floating point arithmetic. All other computations use integer arithmetic. The code contains one linked list that uses dynamic memory allocation (second obvious problem). All inputs are checked to determine that they are within expected bounds before they are used.

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• Unified data source for k2 installed Joomla websites

  - by Özkan ÖZLÜ

  I am responsible for a few web sites of my organization. I use Joomla! 2.5.9 for those web sites. They all are running at the same server. I use K2 component for content managing. I have a general website in which shows all the staff information at the 'Staff' page. Also some of those people and their contents are shown in another department's website. So, there are databases for each web site. For example: In the general website (let's say general.org), when I click on the 'Staff' menu item, page shows all of the people work at my organization. Also they work at different departments. In another web site (eg: education.general.org) when I click on the 'Staff' menu item, it shows the people work at education department. But for each web site, I have different user accounts which means a modification in one of them does not affect the other one. If the one of the education staff tries to change his profile picture on the education web site, he also has to do it on the general web site. And sometimes one person might be working at two departments. Thus he has to edit three times of his data. Is it possible to merge the records for all websites? In other words, I want everyone to insert/update their data on the general web site, and the other web sites will be updated automatically.

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• Spherical to Cartesian Coordinates

  - by user1258455

  Well I'm reading the Frank's Luna DirectX10 book and, while I'm trying to understand the first demo, I found something that's not very clear at least for me. In the updateScene method, when I press A, S, W or D, the angles mTheta and mPhi change, but after that, there are three lines of code that I don't understand exactly what they do: // Convert Spherical to Cartesian coordinates: mPhi measured from +y // and mTheta measured counterclockwise from -z. float x = 5.0f*sinf(mPhi)*sinf(mTheta); float z = -5.0f*sinf(mPhi)*cosf(mTheta); float y = 5.0f*cosf(mPhi); I mean, this explains that they do, it says that it converts the spherical coordinates to cartesian coordinates, but, mathematically, why? why the x value is calculated by the product of the sins of both angles? And the z by the product of the sine and cosine? and why the y just uses the cosine? After that, those values (x, y and z) are used to build the view matrix. The book doesn't explain (mathematically) why those values are calculated like that (and I didn't find anything to help me to understand it at the first Part of the book: "Mathematical prerequisites"), so it would be good if someone could explain me what exactly happen in those code lines or just give me a link that helps me to understand the math part. Thanks in advance!

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• NHibernate Pitfalls: Cascades

  - by Ricardo Peres

  This is part of a series of posts about NHibernate Pitfalls. See the entire collection here. For entities that have associations – one-to-one, one-to-many, many-to-one or many-to-many –, NHibernate needs to know what to do with their related entities, in three particular moments: when saving, updating or deleting. In particular, there are two possible behaviors: either ignore these related entities or cascade changes to them. NHibernate allows setting the cascade behavior for each association, and the default behavior is not to cascade (ignore). The possible cascade options are: None Ignore, this is the default Save-Update If the entity is being saved or updated, also save any related entities that are either not saved or have been modified and associate these related entities to the root entity. Generally safe Delete If the entity is being deleted, also delete the related entities. This is only useful for parent-child relations Delete-Orphan Identical to Delete, with the addition that if once related entity is removed from the association – orphaned –, also delete it. Also only for parent-child All Combination of Save-Update and Delete, usually that’s what we want (for parent-child relations, of course) All-Delete-Orphan Same as All plus delete any related entities who lose their relationship In summary, Save-Update is generally what you want in most cases. As for the Delete variations, they should only be used if the related entities depend on the root entity (parent-child), so that deleting the root entity and not their related entities would result in a constraint violation on the database.

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• Pidgin XML

  - by David Totzke

  I'm looking at an xml document that gets passed to a COM object (yes, I said the "C" word) to save a new record.  You can tell by the "new|" at the top of the file before the xml declaration.  If we were saving, there would be "edit|" at the top.  Couldn't you just have a root element with something like: <myRootElement mode="new"> Ah, here's why that won't work... There's no single root element but that's ok because next we find that this document is actually several documents.  <?xml version="1.0"?> appears several times.  The final document opens with <myElementStart> and closes with <myElementEnd> so it's not even well-formed. This isn't a style thing.  This is broken.  I mean, basic well-formed XML only has two rules; three if you count the xml declaration but it works as a document for DTO purposes without it. One root element. Close all elements with a matching tag. As a result, both ends of this conversation need to speak the same dialect of broken XML in order to communicate.  To join the conversation, you must also learn pidgin XML. How can you start out so right - XML being the obvious choice in this instance - and then go so horribly wrong? Dave Just because I can…

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• What kind of physics to choose for our arcade 3D MMO?

  - by Nick

  We're creating an action MMO using Three.js (WebGL) with an arcadish feel, and implementing physics for it has been a pain in the butt. Our game has a terrain where the character will walk on, and in the future 3D objects (a house, a tree, etc) that will have collisions. In terms of complexity, the physics engine should be like World of Warcraft. We don't need friction, bouncing behaviour or anything more complex like joints, etc. Just gravity. I have managed to implement terrain physics so far by casting a ray downwards, but it does not take into account possible 3D objects. Note that these 3D objects need to have convex collisions, so our artists create a 3D house and the player can walk inside but can't walk through the walls. How do I implement proper collision detection with 3D objects like in World of Warcraft? Do I need an advanced physics engine? I read about Physijs which looks cool, but I fear that it may be overkill to implement that for our game. Also, how does WoW do it? Do they have a separate raycasting system for the terrain? Or do they treat the terrain like any other convex mesh? A screenshot of our game so far:

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• Back to Sony

  - by Bunch

  Well I switched back to Sony. After about a year of debating whether or not to keep my XBox 360 or get a PS3 I decided over the weekend to trade in the 360 for a PS3.  I had thought about keeping both but I really don’t need two gaming systems. So far I like it, the graphics are good and the game selection is pretty much the same. For me the game exclusives didn’t sway me one way or the other (i.e. I’ve never played Halo so you can’t miss what you never played). My main reasons for switching were: RROD – I’ve had three and I don’t play a huge amount per week. Free online gaming – I never did buy a Live Gold account even though it is affordable Blu-ray player – Figured this is as good of a time as any to finally get one Netflix streaming with no need for an upgrade to your online account like on XBox MUCH quieter system Finally at a $299 price point All in all the last point was the main one for me. Like a lot of other folks I was really put off by the PS3’s original pricing of $499 and $599. Technorati Tags: Gaming

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• A better alternative to incompatible implementations for the same interface?

  - by glenatron

  I am working on a piece of code which performs a set task in several parallel environments where the behaviour of the different components in the task are similar but quite different. This means that my implementations are quite different but they are all based on the relationships between the same interfaces, something like this: IDataReader -> ContinuousDataReader -> ChunkedDataReader IDataProcessor -> ContinuousDataProcessor -> ChunkedDataProcessor IDataWriter -> ContinuousDataWriter -> ChunkedDataWriter So that in either environment we have an IDataReader, IDataProcessor and IDataWriter and then we can use Dependency Injection to ensure that we have the correct one of each for the current environment, so if we are working with data in chunks we use the ChunkedDataReader, ChunkedDataProcessor and ChunkedDataWriter and if we have continuous data we have the continuous versions. However the behaviour of these classes is quite different internally and one could certainly not go from a ContinuousDataReader to the ChunkedDataReader even though they are both IDataProcessors. This feels to me as though it is incorrect ( possibly an LSP violation? ) and certainly not a theoretically correct way of working. It is almost as though the "real" interface here is the combination of all three classes. Unfortunately in the project I am working on with the deadlines we are working to, we're pretty much stuck with this design, but if we had a little more elbow room, what would be a better design approach in this kind of scenario?

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• ArchBeat Link-o-Rama for October 24, 2013

  - by OTN ArchBeat

  Video: How To Embed Custom Content Into Fusion Applications Watch this video tutorial from the Fusion Applications Developer Relations YouTube Channel to learn how to embed reports, charts, twitter streams, web pages, news feeds, and other custom content into Fusion Applications. Oracle GoldenGate 12c - New Release, New Features | Michael Rainey Rittman Mead's Michael Rainey takes you on guided tour through the GoldenGate 12c features that "are relevant to data warehouse and data migration work we typically see in the business intelligence world." Reproducing WebLogic Stuck Threads with ADF CreateInsert Operation and ORDER BY Clause | Andrejus Baranovskis Another post from Oracle ACE Director Andrejus Baranovsikis on dealing with WebLogic Stuck Threads. This one includes a test case application you can download. Oracle WebLogic 12.1.2 Installation in VirtualBox with 0 MHz | Dr. Frank Munz Oracle ACE Director Frank Munz shares the results of some detective work to discover the cause of a strange problem in an Oracle WebLogic installation. The Impact of SaaS - The Times They Are A-Changin' | Floyd Teter Oracle ACE Director Floyd Teter shares some truly interesting insight gained in conversations with three Fortune 500 CIOs. Thought for the Day "All the mistakes I ever made were when I wanted to say 'No' and said 'Yes'." — Moss Hart, playwright, screenwriter (October 24, 1904 – December 20, 1961) Source: brainyquote.com

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• JavaOne Content on Video

  - by Tori Wieldt

  JavaOne content is available in video in three sizes, depending on if you want to have a sip, have a drink, or go to the proverbial firehose. Tall (Keynote Highlights) Go to the JavaOne playlist on the YouTube Java channel for highlights of the JavaOne Keynotes.  Grande (Keynotes in Full) Go to the Oracle Media Network JavaOne 2012 channel to view the keynotes in full (Community Keynote coming soon). Venti (All Sessions, BOFs and Tutorials) To view slides paired with audio of each session, go to the JavaOne content catalog (JavaOne homepage > Programs > Content Catalog) and select a session. If a video is available, you'll see "Media" in the right column. Look under "Presentation Download" to get the slides. Sessions are being made available as quickly as possible. "It's exciting to see Oracle take community stewardship so seriously," said Sharat Chander, Group Director for Java Technology Outreach. "Making all JavaOne sessions on video available online for free will helps make the future Java for everyone."

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