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• What is a resonable workflow for designing webapps?

  - by Evan Plaice

  It has been a while since I have done any substantial web development and I'd like to take advantage of the latest practices but I'm struggling to visualize the workflow to incorporate everything. Here's what I'm looking to use: CakePHP framework jsmin (JavaScript Minify) SASS (Synctactically Awesome StyleSheets) Git CakePHP: Pretty self explanatory, make modifications and update the source. jsmin: When you modify a script, do you manually run jsmin to output the new minified code, or would it be better to run a pre-commit hook that automatically generates jsmin outputs of javascript files that have changed. Assume that I have no knowledge of implementing commit hooks. SASS: I really like what SASS has to offer but I'm also aware that SASS code isn't supported by browsers by default so, at some point, the SASS code needs to be transformed to normal CSS. At what point in the workflow is this done. Git I'm terrified to admit it but, the last time I did any substantial web development, I didn't use SCM source control (IE, I did use source control but it consisted of a very detailed change log with backups). I have since had plenty of experience using Git (as well as mercurial and SVN) for desktop development but I'm wondering how to best implement it for web development). Is it common practice to implement a remote repository on the web host so I can push the changes directly to the production server, or is there some cross platform (windows/linux) tool that makes it easy to upload only changed files to the production server. Are there web hosting companies that make it eas to implement a remote repository, do I need SSH access, etc... I know how to accomplish this on my own testing server with a remote repository with a separate remote tracking branch already but I've never done it on a remote production web hosting server before so I'm not aware of the options yet. Extra: I was considering implementing a javascript framework where separate javascript files used on a page are compiled into a single file for each page on the production server to limit the number of file downloads needed per page. Does something like this already exist? Is there already an open source project out in the wild that implements something similar that I could use and contribute to? Considering how paranoid web devs are about performance (and the fact that the number of file requests on a website is a big hit to performance) I'm guessing that there is some wizard hacker on the net who has already addressed this issue.

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• Playing a Song causing WP7 to crash on phone, but not on emulator

  - by Michael Zehnich

  Hi there, I am trying to implement a song into a game that begins playing and continually loops on Windows Phone 7 via XNA 4.0. On the emulator, this works fine, however when deployed to a phone, it simply gives a black screen before going back to the home screen. Here is the rogue code in question, and commenting this code out makes the app run fine on the phone: // in the constructor fields private Song song; // in the LoadContent() method song = Content.Load<Song>("song"); // in the Update() method if (MediaPlayer.GameHasControl && MediaPlayer.State != MediaState.Playing) { MediaPlayer.Play(song); } The song file itself is a 2:53 long, 2.28mb .wma file at 106kbps bitrate. Again this works perfectly on emulator but does not run at all on phone. Thanks for any help you can provide!

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• Why I'm getting the same result when deleting target?

  - by XNA

  In the following code we use target in the function: moon.mouseEnabled = false; sky0.addChild(moon); addEventListener(MouseEvent.MOUSE_DOWN, onDrag, false, 0, true); addEventListener(MouseEvent.MOUSE_UP, onDrop, false, 0, true); function onDrag(evt:MouseEvent):void { evt.target.addChild(moon); evt.target.startDrag(); } function onDrop(evt:MouseEvent):void { stopDrag(); } But if I rewrite this code without evt.target it still work. So what is the difference, am I going to get errors later in the run time because I didn't put target? If not then why some use target a lot while it works without it. function onDrag(evt:MouseEvent):void { addChild(moon); startDrag(); }

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• Working with Key Flex Fields in OAF

  - by PRajkumar

  1. Create a New Workspace and Project Right click Workspaces and click create New OA Workspace and name it as PRajkumarKFFDemo. Automatically a new OA Project will also be created. Name the project as KFFDemo and package as prajkumar.oracle.apps.fnd.kffdemo   2. Create a New Application Module (AM) Right Click on KFFDemo > New > ADF Business Components > Application Module Name -- KFFAM Package -- prajkumar.oracle.apps.fnd.kffdemo.server   Check Application Module Class: KFFAMImpl Generate JavaFile(s)   3. Create a New View Object (VO) Right click on KFFDemo > New > ADF Business Components > View Object Name -- KFFVO Package -- prajkumar.oracle.apps.fnd.kffdemo.server   Note - The VO is not based on any EO so click next and go to the query section and paste the query   SELECT  code_combination_id FROM    gl_code_combinations_kfv   In Step8 Check Object Class: KFFVOImpl -> Generate Java File -> Bind Variable Accessors   4. Add View Object to Root UI Application Module Right Click on KFFAM > Edit KFFAM > Data Model and shuttle KFFVO from Available View Objects to Data Model   5. Create a New Page Right click on KFFDemo > New > Web Tier > OA Components > Page Name -- KFFPG Package -- prajkumar.oracle.apps.fnd.kffdemo.webui   6. Select the KFFPG and go to the strcuture pane where a default region has been created   7. Select region1 and set the following properties:   Attribute Property ID PageLayoutRN AM Definition prajkumar.oracle.apps.fnd.kffdemo.server.KFFAM Window Title Key Flex Field Demo Window Title Key Flex Field Demo     8. Create Stack Layout Region Under Page Layout Region Right click PageLayoutRN > New > Region   Attribute Property ID MainRN AM Definition stackLayout   9. Create a New Item of type Flex under the Stack Layout Region Right click on MainRN > New > Item Set Following Properties for New Item --   Attribute Property ID KeyFlexItem Item Style Flex Prompt Accounting Key Flex Field Appl Short Name SQLGL Name GL# Type Key View Instance KFFVO1     10. Create Controller for page KFFPG Right Click on PageLayoutRN > Set New Controller Package Name: prajkumar.oracle.apps.fnd.kffdemo.webui Class Name: KFFCO   Write Following Code in KFFCO processRequest   public void processRequest(OAPageContext pageContext, OAWebBean webBean) {  super.processRequest(pageContext, webBean);    OAKeyFlexBean kffId = (OAKeyFlexBean)webBean.findIndexedChildRecursive("KeyFlexItem");    // Set the code combination lov   kffId.useCodeCombinationLOV(true);   //set the structure code for the item key flex    kffId.setStructureCode("FED_AFF");   //Set the attribute name to the item   kffId.setCCIDAttributeName("CodeCombinationId");  //Execute the Query   KFFAMImpl am = (KFFAMImpl)pageContext.getApplicationModule(webBean);   KFFVOImpl vo = (KFFVOImpl)am.findViewObject("KFFVO1");          if(!vo.isPreparedForExecution())   {          vo.executeQuery();   } }   Note -- If you do not want to see the key flex field is merging one then change the code in the controller class as below   kffId.useCodeCombinationLOV(false);   11. Use the below Query to find the Structure Code   SELECT  fif.application_id,                  fif.id_flex_code,                  fif.id_flex_name,                  fif.application_table_name,                   fif.description,                  fifs.id_flex_num,                  fifs.id_flex_structure_code,                  fifse.segment_name,                  fifse.segment_num,                  fifse.flex_value_set_id  FROM     fnd_id_flexs                    fif,                  fnd_id_flex_structures   fifs,                   fnd_id_flex_segments    fifse  WHERE  fif.application_id      = fifs.application_id  AND       fif.id_flex_code         = fifs.id_flex_code  AND       fifse.application_id   = fif.application_id  AND       fifse.id_flex_code      = fif.id_flex_code  AND       fifse.id_flex_num      = fifs.id_flex_num  AND       fif.id_flex_code         LIKE 'GL#' AND       fif.id_flex_name       LIKE 'Accounting Flexfield';   12. Congratulation you have successfully finished. Run Your page and Test Your Work        

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• RenderState in XNA 4

  - by Shashwat

  I was going through this tutorial for having transparency which can be used to solve my problem here. The code is written in XNA 3 but I'm using XNA 4. What is the alternative for the following code in XNA 4? device.RenderState.AlphaTestEnable = true; device.RenderState.AlphaFunction = CompareFunction.GreaterEqual; device.RenderState.ReferenceAlpha = 200; device.RenderState.DepthBufferWriteEnable = false; I searched a lot but didn't find anything useful.

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• A better way to do concurrent programming

  - by Alex.Davies

  Programming to take advantage of multicore processors is hard. If you let multiple threads access the same memory, bad things happen. To avoid this, you use the lock keyword, but if you use that in the wrong way, your code deadlocks. It's all a nightmare. Luckily, there's a better way - Actors. They're really easy to think about. They're really safe (if you follow a couple of simple rules). And high-performance, type-safe actors are now available for .NET by using this open-source library: http://code.google.com/p/n-act/ Have a look at the site for details. I'll blog with more reasons to use actors and tips and tricks to get the best parallelism from them soon.

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• Source of (programmer) inefficiency

  - by Daniel

  I am interested to gain a better insight about the possible reasons of personal inefficiency as programmers (and only in programming) due to – simply - our own errors (because we are humans – well, almost all of us). I am not interested in how much we are productive or in how many adjustements the customer asks for when the work is done, but where and how each of us spend that part of its time in tasks that are unproductive and there is no one to blame except ourselves. Excluding ego - feeding and / or self – gratification, what I am trying to get (for all of us) is: what are the common issues eating our time; insight on reasons for that issues; identify simple way for us, personally (not delegating actions to other or our organizations), to correct our own problems. Please, do not think in academic terms but aim at the opportunity to compare our daily experiences and understand what are and how we try to fix our personal deficiencies. If you are interested to respond to this post, please: integrate the list if you see something important (or obvious) missing; highlight or name honestly your first issue tellng the way you try to address and solve your issue acting on yourself and yourself only in a sort of "continuous quality improving" My criteria for accepting the answer is: choose the best solution (feasibility and utility) to fix one (or more) of the problems of the list. Of course, selecting an error is not a vote on our skills: maybe we are hyper professional programmers and we lose ten minutes only every year or we are terribly inefficient, losing a couple of days a week: reasons for inefficiency could be really the same - but in a different scale. A possible list: Plain error in the names (variables, functions). Inability to see the obvious in your code. Misreading. Lack of concentration. Trying to use a technology you have not mastered. Errors with data types. Time required to understand your previous code or your documentation. Trying to do something more than requested because you enjoy it Using solutions more complicated than required because you enjoy it. Plain logical errors. Errors due to your fault in communications. Distraction My first personal issue: "Trying to use a technology you do not master." I have to use daily several technologies and I often need to spend significant time correcting code because my assumptions were plainly wrong. Reasons for this: production needs put high pressure and make difficult to find the time to learn. I try to address this reading technical books - as many as I can - even if this actually consumes a lot of time.

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• XNA: Networking gone totally out of sync

  - by MesserChups

  I'm creating a multiplayer interface for a game in 2D some of my friends made, and I'm stuck with a huge latency or sync problem. I started by adapting my game to the msdn xna network tutorial and right now when I join a SystemLink network session (1 host on PC and 1 client on Xbox) I can move two players, everything is ok, but few minutes later the two machines start being totally out of synchronization. When I move one player it takes 10 or 20 seconds (increasing with TIME) to take effect on the second machine. I've tried to : Create a thread which calls NetworkSession.Update() continuously as suggested on this forum, didn't worked. Call the Send() method one frame on 10, and the receive() method at each frame, didn't worked either. I've cleaned my code, flushed all buffers at each call and switched the host and client but the problem still remain... I hope you have a solution because I'm running out of ideas... Thanks SendPackets() code : protected override void SendPackets() { if ((NetworkSessionState)m_networkSession.SessionState == NetworkSessionState.Playing) //Only while playing { //Write in the packet manager m_packetWriter.Write(m_packetManager.PacketToSend.ToArray(), 0, (int)m_packetManager.PacketToSend.Position); m_packetManager.ResetPacket(); //flush //Sends the packets to all remote gamers foreach (NetworkGamer l_netGamer in m_networkSession.RemoteGamers) { if (m_packetWriter.Length != 0) { FirstLocalNetGamer.SendData(m_packetWriter, SendDataOptions.None, l_netGamer); } } m_packetWriter.Flush();//m m_packetWriter.Seek(0, 0); } } ReceivePackets() code : public override void ReceivePackets() { base.ReceivePackets(); if ((NetworkSessionState)m_networkSession.SessionState == NetworkSessionState.Playing) //Only while playing { if (m_networkSession.LocalGamers.Count > 0) //Verify that there's at least one local gamer { foreach (LocalNetworkGamer l_localGamer in m_networkSession.LocalGamers) { //every LocalNetworkGamer must read to flush their stream // Keep reading while packets are available. NetworkGamer l_oldSender = null; while (l_localGamer.IsDataAvailable) { // Read a single packet, even if we are the host, we must read to clear the queue NetworkGamer l_newSender; l_localGamer.ReceiveData(m_packetReader, out l_newSender); if (l_newSender != l_oldSender) { if ((!l_newSender.IsLocal) && (l_localGamer == FirstLocalNetGamer)) { //Parsing PacketReader to MemoryStream m_packetManager.Receive(new MemoryStream(m_packetReader.ReadBytes(m_packetReader.Length))); } } l_oldSender = l_newSender; m_packetReader.BaseStream.Flush(); m_packetReader.BaseStream.Seek(0, SeekOrigin.Begin); } } m_packetManager.ParsePackets(); } } }

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• What is 'work' in the Pomodoro Technique?

  - by Sachin Kainth

  I have just started to use Pomodoro today and I am trying to work out what I should and should not do during my 25 minute work time. For my 25 minute work stint I started to write some code and realised that I had done something similar in a related project so I opened that solution to copy and paste that existing code. Question is, is this allowed? Also, if during my 25 minutes I realise that there is an important work-related email that I need to send can I do that or should that wait for the next 25 minutes or the break. I am writing this question during my, now extended, 5 minute break. Is this work or is it a break? I really would appreciate some guidance as I really want to use Pomodoro to focus better on my work. Another thing that happened to me was that a Adobe AIR update alert came up on my desktop during the 25 minutes. Should I ignore such things until the break? Sachin

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• What are some good practices when trying to teach declarative programming to imperative programmers?

  - by ChaosPandion

  I offered to do a little bit training in F# at my company and they seemed to show some interest. They are generally VB6 and C# programmers who don't follow programming with too much passion. That being said I feel like it is easier to write correct code when you think in a functional matter so they should definitely get some benefit out of it. Can anyone offer up some advice on how I should approach this? Ideas Don't focus on the syntax, instead focus on how this language and the idioms it promotes can be used. Try and think of examples that are a pain to write in an imperative fashion but translates to elegant code when written in a declarative fashion.

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• Can the Clojure set and maps syntax be added to other Lisp dialects?

  - by Cedric Martin

  In addition to create list using parentheses, Clojure allows to create vectors using [ ], maps using { } and sets using #{ }. Lisp is always said to be a very extensible language in which you can easily create DSLs etc. But is Lisp so extensible that you can take any Lisp dialect and relatively easily add support for Clojure's vectors, maps and sets (which are all functions in Clojure)? I'm not necessarily asking about cons or similar actually working on these functions: what I'd like to know is if the other could be modified so that the source code would look like Clojure's source code (that is: using matching [ ], { } and #{ } in addition to ( )). Note that if it cannot be done this is not a criticism of Lisp: what I'd like to know is, technically, what should be done or what cannot be done if one were to add such a thing.

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• Part 1: What are EBS Customizations?

  - by volker.eckardt(at)oracle.com

  Everything what is not shipped as Oracle standard may be called customization. And very often we differentiate between setup and customization, although setup can also be required when working with customizations.This highlights one of the first challenges, because someone needs to track setup brought over with customizations and this needs to be synchronized with the (standard) setup done manually. This is not only a tracking issue, but also a documentation issue. I will cover this in one of the following blogs in more detail.But back to the topic itself. Mainly our code pieces (java, pl/sql, sql, shell scripts), custom objects (tables, views, packages etc.) and application objects (concurrent programs, lookups, forms, reports, OAF pages etc.) are treated as customizations. In general we define two types: customization by extension and customization by modification. For sure we like to minimize standard code modifications, but sometimes it is just not possible to provide a certain functionality without doing it.Keep in mind that the EBS provides a number of alternatives for modifications, just to mention some:Files in file system    add your custom top before the standard top to the pathBI Publisher Report    add a custom layout and disable the standard layout, automatically yours will be taken.Form /OAF Change    use personalization or substitutionUsing such techniques you are on the safe site regarding standard patches, but for sure a retest is always required!Many customizations are growing over the time, initially it was just one file, but in between we have 5, 10 or 15 files in our customization pack. The more files you have, the more important is the installation order.Last but not least also personalization's are treated as customizations, although you may not use any deployment pack to transfer such personalisation's (but you can). For OAF personalization's you can use iSetup, I have also enabled iSetup to allow Forms personalizations to transport.Interfaces and conversion objects are quite often also categorized as customizations and I promote this decision. Your development standards are related to all these kinds of custom code whether we are exchanging data with users (via form or report) or with other systems (via inbound or outbound interface).To cover all these types of customizations two acronyms have been defined: RICE and CEMLI.RICE = Reports, Interfaces, Conversions, and ExtensionsCEMLI = Customization, Extension, Modification, Localization, IntegrationThe word CEMLI has been introduced by Oracle On Demand and is used within Oracle projects quite often, but also RICE is well known as acronym.It doesn't matter which acronym you are using, the main task here is to classify and categorize your customizations to allow everyone to understand when you talk about RICE- 211, CEMLI XXFI_BAST or XXOM_RPT_030.Side note: Such references are not automatically objects prefixes, but they are often used as such. I plan also to address this point in one other blog.Thank you!Volker

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• Cooperator Framework

  - by csharp-source.net

  Cooperator Framework is a base class library for high performance Object Relational Mapping (ORM), and a code generation tool that aids agile application development for Microsoft .Net Framework 2.0/3.0. The main features are: * Use business entities. * Full typed Model (Data Layer and Entities) * Maintain persistence across the layers by passing specific types( .net 2.0/3.0 generics) * Business objects can bind to controls in Windows Forms and Web Forms taking advantage of data binding of Visual Studio 2005. * Supports any Primary Key defined on tables, with no need to modify it or to create a unique field. * Uses stored procedures for data access. * Supports concurrency. * Generates code both for stored procedures and projects in C# or Visual Basic. * Maintains the model in a repository, which can be modified in any stage of the development cycle, regenerating the model on demand.

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• How do I resolve "No JSON object could be decoded" on mythbuntu live CD?

  - by Neil

  I have been running a MythTV frontend on my laptop for some time against a MythTV backend installed in Linux Mint 12 on another computer, and everything works fine. Now, I'm trying out the Mythbuntu Live CD (12.04.1 32-bit) on the laptop, to turn it into a dedicated front end. It's connecting to the network just fine, and I can see my server. When I click on the frontend icon on the desktop, it asks me for the security code, which I've verified against mythtv-setup on the server. However, when I test that code, it shows the error message "No JSON object could be decoded". I've looked in the control center to see if there's something else I should be setting up. The message above implies to me that it can't find the server, but I can find no place in the control center to tell it where to find my myth backend, which I find a little odd. Does the live CD not work against a backend server on another machine?

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• How to unicode Myanmar texts on Java? [closed]

  - by Spacez Ly Wang

  I'm just beginner of Java. I'm trying to unicode (display) correctly Myanmar texts on Java GUI ( Swing/Awt ). I have four TrueType fonts which support Myanmar unicode texts. There are Myanmar3, Padauk, Tharlon, Myanmar Text ( Window 8 built-in ). You may need the fonts before the code. Google the fonts, please. Each of the fonts display on Java GUI differently and incorrectly. Here is the code for GUI Label displaying myanmar texts: ++++++++++++++++++++++++ package javaapplication1; import javax.swing.JFrame; import javax.swing.JTextField; public class CusFrom { private static void createAndShowGUI() { JFrame frame = new JFrame("Hello World Swing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); String s = "\u1015\u102F \u103C\u1015\u102F"; JLabel label = new JLabel(s); label.setFont(new java.awt.Font("Myanmar3", 0, 20));// font insert here, Myanmar Text, Padauk, Myanmar3, Tharlon frame.getContentPane().add(label); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } ++++++++++++++++++++++++ Outputs vary. See the pictures: Myanmar3 IMG Padauk IMG Tharlon IMG Myanmar Text IMG What is the correct form? (on notepad) Well, next is the code for GUI Textfield inputting Myanmar texts: ++++++++++++++++++++++++ package javaapplication1; import javax.swing.JFrame; import javax.swing.JTextField; public class XusForm { private static void createAndShowGUI() { JFrame frame = new JFrame("Frame Title"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JTextField textfield = new JTextField(); textfield.setFont(new java.awt.Font("Myanmar3", 0, 20)); frame.getContentPane().add(textfield); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } ++++++++++++++++++++++++ Outputs vary when I input keys( unicode text ) on keyboards. Myanmar Text Output IMG Padauk Output IMG Myanmar3 Output IMG Tharlon Output IMG Those fonts work well on Linux when opening text files with Text Editor application. My Question is how to unicode Myanmar texts on Java GUI. Do I need additional codes left to display well? Or Does Java still have errors? The fonts display well on Web Application (HTML, CSS) but I'm not sure about displaying on Java Web Application.

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• What should be the minimal design/scope documentation before development begins?

  - by Oliver Hyde

  I am a junior developer working on my own in the programming aspect of projects. I am given a png file with 5-6 of the pages designed, most times in specific detail. From this I'm asked to develop the back end system needed to maintain the website, usually a cataloging system with products, tags and categories and match the front end to the design. I find myself in a pickle because when I make decisions based on assumptions about the flow of the website, due to a lack of outlining details, I get corrected and am required to rewrite the code to suit what was actually desired. This process happens multiple times throughout a project, often times on the same detail, until it's finally finished, with broken windows all through it. I understand that projects have scope creep, and can appreciate that I need to plan for this, but I feel that in this situation, I'm not receiving enough outlining details to effectively plan for the project, resulting in broken code and a stressed mind. What should be the minimal design/scope documentation I receive before I begin development?

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• unseen/unknown function definition in linux source

  - by Broncha

  Can any one please explain this piece of code I found in the linux kernel source. I see a lots of code like this in linux and minix kernel but dont seem to find what it does (even if C compilers support that kind of function definition) /* IRQs are disabled and uidhash_lock is held upon function entry. * IRQ state (as stored in flags) is restored and uidhash_lock released * upon function exit. */ static void free_user(struct user_struct *up, unsigned long flags) __releases(&uidhash_lock) { uid_hash_remove(up); spin_unlock_irqrestore(&uidhash_lock, flags); key_put(up->uid_keyring); key_put(up->session_keyring); kmem_cache_free(uid_cachep, up); } I cannot find out if this reference __releases(&uidhash_lock) before the parenthesis starts is allowed OR supported. (It sure is supported as it is in the linux kernel)

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• Sorting and Filtering By Model-Based LOV Display Value

  - by Steven Davelaar

  If you use a model-based LOV and you use display type "choice", then ADF nicely displays the display value, even if the table is read-only. In the screen shot below, you see the RegionName attribute displayed instead of the RegionId. This is accomplished by the model-based LOV, I did not modify the Countries view object to include a join with Regions.  Also note the sort icon, the table is sorted by RegionId. This sorting typically results in a bug reported by your test team. Europe really shouldn't come before America when sorting ascending, right? To fix this, we could of course change the Countries view object query and add a join with the Regions table to include the RegionName attribute. If the table is updateable, we still need the choice list, so we need to move the model-based LOV from the RegionId attribute to the RegionName attribute and hide the RegionId attribute in the table. But that is a lot of work for such a simple requirement, in particular if we have lots of model-based choice lists in our view object. Fortunately, there is an easier way to do this, with some generic code in your view object base class that fixes this at once for all model-based choice lists that we have defined in our application. The trick is to override the method getSortCriteria() in the base view object class. By default, this method returns null because the sorting is done in the database through a SQL Order By clause. However, if the getSortCriteria method does return a sort criteria the framework will perform in memory sorting which is what we need to achieve sorting by region name. So, inside this method we need to evaluate the Order By clause, and if the order by column matches an attribute that has a model-based LOV choicelist defined with a display attribute that is different from the value attribute, we need to return a sort criterria. Here is the complete code of this method: public SortCriteria[] getSortCriteria() {   String orderBy = getOrderByClause();          if (orderBy!=null )   {     boolean descending = false;     if (orderBy.endsWith(" DESC"))      {       descending = true;       orderBy = orderBy.substring(0,orderBy.length()-5);     }     // extract column name, is part after the dot     int dotpos = orderBy.lastIndexOf(".");     String columnName = orderBy.substring(dotpos+1);     // loop over attributes and find matching attribute     AttributeDef orderByAttrDef = null;     for (AttributeDef attrDef : getAttributeDefs())     {       if (columnName.equals(attrDef.getColumnName()))       {         orderByAttrDef = attrDef;         break;       }     }     if (orderByAttrDef!=null && "choice".equals(orderByAttrDef.getProperty("CONTROLTYPE"))          && orderByAttrDef.getListBindingDef()!=null)     {       String orderbyAttr = orderByAttrDef.getName();       String[] displayAttrs = orderByAttrDef.getListBindingDef().getListDisplayAttrNames();       String[] listAttrs = orderByAttrDef.getListBindingDef().getListAttrNames();       // if first list display attributes is not the same as first list attribute, than the value       // displayed is different from the value copied back to the order by attribute, in which case we need to       // use our custom comparator       if (displayAttrs!=null && listAttrs!=null && displayAttrs.length>0 && !displayAttrs[0].equals(listAttrs[0]))       {                  SortCriteriaImpl sc1 = new SortCriteriaImpl(orderbyAttr, descending);         SortCriteria[] sc = new SortCriteriaImpl[]{sc1};         return sc;                           }     }     }   return super.getSortCriteria(); } If this method returns a sort criteria, then the framework will call the sort method on the view object. The sort method uses a Comparator object to determine the sequence in which the rows should be returned. This comparator is retrieved by calling the getRowComparator method on the view object. So, to ensure sorting by our display value, we need to override this method to return our custom comparator: public Comparator getRowComparator() {   return new LovDisplayAttributeRowComparator(getSortCriteria()); } The custom comparator class extends the default RowComparator class and overrides the method compareRows and looks up the choice display value to compare the two rows. The complete code of this class is included in the sample application.  With this code in place, clicking on the Region sort icon nicely sorts the countries by RegionName, as you can see below. When using the Query-By-Example table filter at the top of the table, you typically want to use the same choice list to filter the rows. One way to do that is documented in ADF code corner sample 16 - How To Customize the ADF Faces Table Filter.The solution in this sample is perfectly fine to use. This sample requires you to define a separate iterator binding and associated tree binding to populate the choice list in the table filter area using the af:iterator tag. You might be able to reuse the same LOV view object instance in this iterator binding that is used as view accessor for the model-bassed LOV. However, I have seen quite a few customers who have a generic LOV view object (mapped to one "refcodes" table) with the bind variable values set in the LOV view accessor. In such a scenario, some duplicate work is needed to get a dedicated view object instance with the correct bind variables that can be used in the iterator binding. Looking for ways to maximize reuse, wouldn't it be nice if we could just reuse our model-based LOV to populate this filter choice list? Well we can. Here are the basic steps: 1. Create an attribute list binding in the page definition that we can use to retrieve the list of SelectItems needed to populate the choice list <list StaticList="false" Uses="LOV_RegionId"               IterBinding="CountriesView1Iterator" id="RegionId"/>  We need this "current row" list binding because the implicit list binding used by the item in the table is not accessible outside a table row, we cannot use the expression #{row.bindings.RegionId} in the table filter facet. 2. Create a Map-style managed bean with the get method retrieving the list binding as key, and returning the list of SelectItems. To return this list, we take the list of selectItems contained by the list binding and replace the index number that is normally used as key value with the actual attribute value that is set by the choice list. Here is the code of the get method:  public Object get(Object key) {   if (key instanceof FacesCtrlListBinding)   {     // we need to cast to internal class FacesCtrlListBinding rather than JUCtrlListBinding to     // be able to call getItems method. To prevent this import, we could evaluate an EL expression     // to get the list of items     FacesCtrlListBinding lb = (FacesCtrlListBinding) key;     if (cachedFilterLists.containsKey(lb.getName()))     {       return cachedFilterLists.get(lb.getName());     }     List<SelectItem> items = (List<SelectItem>)lb.getItems();     if (items==null || items.size()==0)     {       return items;     }     List<SelectItem> newItems = new ArrayList<SelectItem>();     JUCtrlValueDef def = ((JUCtrlValueDef)lb.getDef());     String valueAttr = def.getFirstAttrName();     // the items list has an index number as value, we need to replace this with the actual     // value of the attribute that is copied back by the choice list     for (int i = 0; i < items.size(); i++)     {       SelectItem si = (SelectItem) items.get(i);       Object value = lb.getValueFromList(i);       if (value instanceof Row)       {         Row row = (Row) value;         si.setValue(row.getAttribute(valueAttr));                 }       else       {         // this is the "empty" row, set value to empty string so all rows will be returned         // as user no longer wants to filter on this attribute         si.setValue("");       }       newItems.add(si);     }     cachedFilterLists.put(lb.getName(), newItems);     return newItems;   }   return null; } Note that we added caching to speed up performance, and to handle the situation where table filters or search criteria are set such that no rows are retrieved in the table. When there are no rows, there is no current row and the getItems method on the list binding will return no items.  An alternative approach to create the list of SelectItems would be to retrieve the iterator binding from the list binding and loop over the rows in the iterator binding rowset. Then we wouldn't need the import of the ADF internal oracle.adfinternal.view.faces.model.binding.FacesCtrlListBinding class, but then we need to figure out the display attributes from the list binding definition, and possible separate them with a dash if multiple display attributes are defined in the LOV. Doable but less reuse and more work. 3. Inside the filter facet for the column create an af:selectOneChoice with the value property of the f:selectItems tag referencing the get method of the managed bean:  <f:facet name="filter">   <af:selectOneChoice id="soc0" autoSubmit="true"                       value="#{vs.filterCriteria.RegionId}">     <!-- attention: the RegionId list binding must be created manually in the page definition! -->                       <f:selectItems id="si0"                    value="#{viewScope.TableFilterChoiceList[bindings.RegionId]}"/>   </af:selectOneChoice> </f:facet> Note that the managed bean is defined in viewScope for the caching to take effect. Here is a screen shot of the tabe filter in action: You can download the sample application here. 

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• Windows Azure ASP.NET MVC 2 Role with Silverlight

  - by GeekAgilistMercenary

  I was working through some scenarios recently with Azure and Silverlight.  I immediately decided a quick walk through for setting up a Silverlight Application running in an ASP.NET MVC 2 Application would be a cool project. This walk through I have Visual Studio 2010, Silverlight 4, and the Azure SDK all installed.  If you need to download any of those go get em? now. Launch Visual Studio 2010 and start a new project.  Click on the section for cloud templates as shown below. After you name the project, the dialog for what type of Windows Azure Cloud Service Role will display.  I selected ASP.NET MVC 2 Web Role, which adds the MvcWebRole1 Project to the Cloud Service Solution. Since I selected the ASP.NET MVC 2 Project type, it immediately prompts for a unit test project.  Because I just want to get everything running first, I will probably be unit testing the Silverlight and just using the MVC Project as a host for the Silverlight for now, and because I would prefer to just add the unit test project later, I am going to select no here. Once you've created the ASP.NET MVC 2 project to host the Silverlight, then create another new project.  Select the Silverlight section under the Installed Templates in the Add New Project dialog.  Then select Silverlight Application. The next dialog that comes up will inquire about using the existing ASP.NET MVC Application I just created, which I do want it to use that so I leave it checked.  The options section however I do not want to check RIA Web Services, do not want a test page added to the project, and I want Silverlight debugging enabled so I leave that checked.  Once those options are appropriately set, just click on OK and the Silverlight Project will be added to the overall solution. The next steps now are to get the Silverlight object appropriately embedded in the web page.  First open up the Site.Master file in the ASP.NET MVC 2 Project located under the Veiws/Shared/ location.  After you open the file review the content of the <header></header> section.  In that section add another <contentplaceholder></contentplaceholder> tag as shown in the code snippet below. <head runat="server"> <title> <asp:ContentPlaceHolder ID="TitleContent" runat="server" /> </title> <link href="../../Content/Site.css" rel="stylesheet" type="text/css" /> <asp:ContentPlaceHolder ID="HeaderContent" runat="server" /> </head> I usually put it toward the bottom of the header section.  It just seems the <title></title> should be on the top of the section and I like to keep it that way. Now open up the Index.aspx page under the ASP.NET MVC 2 Project located in the Views/Home/ directory.  When you open up that file add a <asp:Content><asp:Content> tag as shown in the next snippet. <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server"> Home Page </asp:Content>   <asp:Content ID=headerContent ContentPlaceHolderID=HeaderContent runat=server>   </asp:Content>   <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2><%= Html.Encode(ViewData["Message"]) %></h2> <p> To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>. </p> </asp:Content> In that center tag, I am now going to add what is needed to appropriately embed the Silverlight object into the page.  The first thing I needed is a reference to the Silverlight.js file. <script type="text/javascript" src="Silverlight.js"></script> After that comes a bit of nitty gritty Javascript.  I create another tag (and for those in the know, this is exactly like the generated code that is dumped into the *.html page generated with any Silverlight Project if you select to "add a test page that references the application".  The complete Javascript is below. function onSilverlightError(sender, args) { var appSource = ""; if (sender != null && sender != 0) { appSource = sender.getHost().Source; }   var errorType = args.ErrorType; var iErrorCode = args.ErrorCode;   if (errorType == "ImageError" || errorType == "MediaError") { return; }   var errMsg = "Unhandled Error in Silverlight Application " + appSource + "\n";   errMsg += "Code: " + iErrorCode + " \n"; errMsg += "Category: " + errorType + " \n"; errMsg += "Message: " + args.ErrorMessage + " \n";   if (errorType == "ParserError") { errMsg += "File: " + args.xamlFile + " \n"; errMsg += "Line: " + args.lineNumber + " \n"; errMsg += "Position: " + args.charPosition + " \n"; } else if (errorType == "RuntimeError") { if (args.lineNumber != 0) { errMsg += "Line: " + args.lineNumber + " \n"; errMsg += "Position: " + args.charPosition + " \n"; } errMsg += "MethodName: " + args.methodName + " \n"; }   throw new Error(errMsg); } I literally, since it seems to work fine, just use what is populated in the automatically generated page.  After getting the appropriate Javascript into place I put the actual Silverlight Object Embed code into the HTML itself.  Just so I know the positioning and for final verification when running the application I insert the embed code just below the Index.aspx page message.  As shown below. <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2> <%= Html.Encode(ViewData["Message"]) %></h2> <p> To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website"> http://asp.net/mvc</a>. </p> <div id="silverlightControlHost"> <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%"> <param name="source" value="ClientBin/CloudySilverlight.xap" /> <param name="onError" value="onSilverlightError" /> <param name="background" value="white" /> <param name="minRuntimeVersion" value="4.0.50401.0" /> <param name="autoUpgrade" value="true" /> <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50401.0" style="text-decoration: none"> <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style: none" /> </a> </object> <iframe id="_sl_historyFrame" style="visibility: hidden; height: 0px; width: 0px; border: 0px"></iframe> </div> </asp:Content> I then open up the Silverlight Project MainPage.xaml.  Just to make it visibly obvious that the Silverlight Application is running in the page, I added a button as shown below. <UserControl x:Class="CloudySilverlight.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400">   <Grid x:Name="LayoutRoot" Background="White"> <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="48,40,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> </Grid> </UserControl> Just for kicks, I added a message box that would popup, just to show executing functionality also. private void button1_Click(object sender, RoutedEventArgs e) { MessageBox.Show("It runs in the cloud!"); } I then executed the ASP.NET MVC 2 and could see the Silverlight Application in page.  With a quick click of the button, I got a message box.  Success! Now the next step is getting the ASP.NET MVC 2 Project and Silverlight published to the cloud.  As of Visual Studio 2010, Silverlight 4, and the latest Azure SDK, this is actually a ridiculously easy process. Navigate to the Azure Cloud Services web site. Once that is open go back in Visual Studio and right click on the cloud project and select publish. This will publish two files into a directory.  Copy that directory so you can easily paste it into the Azure Cloud Services web site.  You'll have to click on the application role in the cloud (I will have another blog entry soon about where, how, and best practices in the cloud). In the text boxes shown, select the application package file and the configuration file and place them in the appropriate text boxes.  This is the part were it comes in handy to have copied the directory path of the file location.  That way when you click on browser you can just paste that in, then hit enter.  The two files will be listed and you can select the appropriate file. Once that is done, name the service deployment.  Then click on publish.  After a minute or so you will see the following screen. Now click on run.  Once the MvcWebRole1 goes green (the little light symbol to the left of the status) click on the Web Site URL.  Be patient during this process too, it could take a minute or two.  The Silverlight application should again come up just like you ran it on your local machine. Once staging is up and running, click on the circular icon with two arrows to move staging to production.  Once you are done make sure the green light is again go for the production deploy, then click on the Web Site URL to verify the site is working.  At this point I had a successful development, staging, and production deployment. Thanks for reading, hope this was helpful.  I have more Windows Azure and other cloud related material coming, so stay tuned. Original Entry

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• Day 6 - Game Menuing Woes and Future Screen Sneak Peeks

  - by dapostolov

  So, after my last post on Day 5 I dabbled with my game class design. I took the approach where each game objects is tightly coupled with a graphic. The good news is I got the menu working but not without some hard knocks and game growing pains. I'll explain later, but for now...here is a class diagram of my first stab at my class structure and some code...   Ok, there are few mistakes, however, I'm going to leave it as is for now... As you can see I created an inital abstract base class called GameSprite. This class when inherited will provide a simple virtual default draw method:        public virtual void DrawSprite(SpriteBatch spriteBatch)         {             spriteBatch.Draw(Sprite, Position, Color.White);         } The benefits of coding it this way allows me to inherit the class and utilise the method in the screen draw method...So regardless of what the graphic object type is it will now have the ability to render a static image on the screen. Example: public class MyStaticTreasureChest : GameSprite {} If you remember the window draw method from Day 3's post, we could use the above code as follows...         protected override void Draw(GameTime gameTime)         {             GraphicsDevice.Clear(Color.CornflowerBlue);             spriteBatch.Begin(SpriteBlendMode.AlphaBlend);             foreach(var gameSprite in ListOfGameObjects)            {                 gameSprite.DrawSprite(spriteBatch);            }             spriteBatch.End();             base.Draw(gameTime);         } I have to admit the GameSprite object is pretty plain as with its DrawSprite method... But ... we now have the ability to render 3 static menu items on the screen ... BORING! I want those menu items to do something exciting, which of course involves animation... So, let's have a peek at AnimatedGameSprite in the above game diagram. The idea with the AnimatedGameSprite is that it has an image to animate...such as ... characters, fireballs, and... menus! So after inheriting from GameSprite class, I added a few more options such as UpdateSprite...         public virtual void UpdateSprite(float elapsed)         {             _totalElapsed += elapsed;             if (_totalElapsed > _timePerFrame)             {                 _frame++;                 _frame = _frame % _framecount;                 _totalElapsed -= _timePerFrame;             }         }  And an overidden DrawSprite...         public override void DrawSprite(SpriteBatch spriteBatch)         {             int FrameWidth = Sprite.Width / _framecount;             Rectangle sourcerect = new Rectangle(FrameWidth * _frame, 0, FrameWidth, Sprite.Height);             spriteBatch.Draw(Sprite, Position, sourcerect, Color.White, _rotation, _origin, _scale, SpriteEffects.None, _depth);         } With these two methods...I can animate and image, all I had to do was add a few more lines to the screens Update Method (From Day 3), like such:             float elapsed = (float) gameTime.ElapsedGameTime.TotalSeconds;             foreach (var item in ListOfAnimatedGameObjects)             {                 item.UpdateSprite(elapsed);             } And voila! My images begin to animate in one spot, on the screen... Hmm, but how do I interact with the menu items using a mouse...well the mouse cursor was easy enough... this.IsMouseVisible = true; But, to have it "interact" with an image was a bit more tricky...I had to perform collision detection!             mouseStateCurrent = Mouse.GetState();             var uiEnabledSprites = (from s in menuItems                                    where s.IsEnabled                                    select s).ToList();             foreach (var item in uiEnabledSprites)             {                 var r = new Rectangle((int)item.Position.X, (int)item.Position.Y, item.Sprite.Width, item.Sprite.Height);                 item.MenuState = MenuState.Normal;                 if (r.Intersects(new Rectangle(mouseStateCurrent.X, mouseStateCurrent.Y, 0, 0)))                 {                     item.MenuState = MenuState.Hover;                     if (mouseStatePrevious.LeftButton == ButtonState.Pressed                         && mouseStateCurrent.LeftButton == ButtonState.Released)                     {                         item.MenuState = MenuState.Pressed;                     }                 }             }             mouseStatePrevious = mouseStateCurrent; So, basically, what it is doing above is iterating through all my interactive objects and detecting a rectangle collision and the object , plays the state animation (or static image).  Lessons Learned, Time Burned... So, I think I did well to start, but after I hammered out my prototype...well...things got sloppy and I began to realise some design flaws... At the time: I couldn't seem to figure out how to open another window, such as the character creation screen Input was not event based and it was bugging me My menu design relied heavily on mouse input and I couldn't use keyboard. Mouse input, is tightly bound with graphic rendering / positioning, so its logic will have to be in each scene. Menu animations would stop mid frame, then continue when the action occured again. This is bad, because...what if I had a sword sliding onthe screen? Then it would slide a quarter of the way, then stop due to another action, then render again mid-slide... it just looked sloppy. Menu, Solved!? To solve the above problems I did a little research and I found some great code in the XNA forums. The one worth mentioning was the GameStateManagementSample. With this sample, you can create a basic "text based" menu system which allows you to swap screens, popup screens, play the game, and quit....basic game state management... In my next post I'm going to dwelve a bit more into this code and adapt it with my code from this prototype. Text based menus just won't cut it for me, for now...however, I'm still going to stick with my animated menu item idea. A sneak peek using the Game State Management Sample...with no changes made... Cool Things to Mention: At work ... I tend to break out in random conversations every-so-often and I get talking about some of my challenges with this game (or some stupid observation about something... stupid) During one conversation I was discussing how I should animate my images; I explained that I knew I had to use the Update method provided, but I didn't know how (at the time) to render an image at an appropriate "pace" and how many frames to use, etc.. I also got thinking that if a machine rendered my images faster / slower, that was surely going to f-up my animations. To which a friend, Sheldon,  answered, surely the Draw method is like a camera taking a snapshot of a scene in time. Then it clicked...I understood the big picture of the game engine... After some research I discovered that the Draw method attempts to keep a framerate of 60 fps. From what I understand, the game engine will even leave out a few calls to the draw method if it begins to slow down. This is why we want to put our sprite updates in the update method. Then using a game timer (provided by the engine), we want to render the scene based on real time passed, not framerate. So even the engine renders at 20 fps, the animations will still animate at the same real time speed! Which brings up another point. Why 60 fps? I'm speculating that Microsoft capped it because LCD's dont' refresh faster than 60 fps? On another note, If the game engine knows its falling behind in rendering...then surely we can harness this to speed up our games. Maybe I can find some flag which tell me if the game is lagging, and what the current framerate is, etc...(instead of coding it like I did last time) Sheldon, suggested maybe I can render like WoW does, in prioritised layers...I think he's onto something, however I don't think I'll have that many graphics to worry about such a problem of graphic latency. We'll see. People to Mention: Well,as you are aware I hadn't posted in a couple days and I was surprised to see a few emails and messenger queries about my game progress (and some concern as to why I stopped). I want to thank everyone for their kind words of support and put everyone at ease by stating that I do intend on completing this project. Granted I only have a few hours each night, but, I'll do it. Thank you to Garth for mailing in my next screen! That was a nice surprise! The Sneek Peek you've been waiting for... Garth has also volunteered to render me some wizard images. He was a bit shocked when I asked for them in 2D animated strips. He said I was going backward (and that I have really bad Game Development Lingo). But, I advised Garth that I will use 3D images later...for now...2D images. Garth also had some great game design ideas to add on. I advised him that I will save his ideas and include them in the future design document (for the 3d version?). Lastly, my best friend Alek, is going to join me in developing this game. This was a project we started eons ago but never completed because of our careers. Now, priorities change and we have some spare time on our hands. Let's see what trouble Alek and I can get into! Tonight I'll be uploading my prototypes and base game to a source control for both of us to work off of. D.

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• Action delegate in C#

  - by Jalpesh P. Vadgama

  In last few posts about I have written lots of things about delegates and this post is also part of that series. In this post we are going to learn about Action delegates in C#.  Following is a list of post related to delegates. Delegates in C#. Multicast Delegates in C#. Func Delegates in C#. Action Delegates in c#: As per MSDN action delegates used to pass a method as parameter without explicitly declaring custom delegates. Action Delegates are used to encapsulate method that does not have return value. C# 4.0 Action delegates have following different variants like following. It can take up to 16 parameters. Action – It will be no parameter and does not return any value. Action(T) Action(T1,T2) Action(T1,T2,T3) Action(T1,T2,T3,T4) Action(T1,T2,T3,T4,T5) Action(T1,T2,T3,T4,T5,T6) Action(T1,T2,T3,T4,T5,T6,T7) Action(T1,T2,T3,T4,T5,T6,T7,T8) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15) Action(T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16) So for this Action delegate you can have up to 16 parameters for Action.  Sound interesting!!… Enough theory now. It’s time to implement real code. Following is a code for that. using System; using System.Collections.Generic; namespace DelegateExample { class Program { static void Main(string[] args) { Action<String> Print = p => Console.WriteLine(p); Action<String,String> PrintAnother = (p1,p2)=> Console.WriteLine(string.Format("{0} {1}",p1,p2)); Print("Hello"); PrintAnother("Hello","World"); } } } In the above code you can see that I have created two Action delegate Print and PrintAnother. Print have one string parameter and its printing that. While PrintAnother have two string parameter and printing both the strings via Console.Writeline. Now it’s time to run example and following is the output as expected. That’s it. Hope you liked it. Stay tuned for more updates!!

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• Great event : Microsoft Visual Studio 2010 Launch @ Microsoft TechEd Blore

  - by sathya

  Great event : Microsoft Visual Studio 2010 Launch @ Microsoft TechEd Blore   I was really excited on attending the day 1 of Microsoft TechEd 2010 in Bangalore. This is the first Teched that am attending. The event was really fun filled with lot of knowledge sharing sessions and lots of goodies and gifts by the partners Initially the Event Started by Murthy's Session. He explained about the Developers relating to the 5 elements of nature (Pancha Boothaas) 1. Fire - Passion 2. Wave (Water) - Catch the right wave which we need to apply. 3. Earth - Connections and lots of opportunities around the world 4. Air -  Its whatever we breathe. Developers.. Without them nothing is possible. they are like the air 5. Sky - Cloud based applications   Next the Keynote and the announcement of Visual Studio by SomaSegar. List of things that he delivered his speech on : 1. Announcement of Visual Studio 2010 2. Announcement of .NET 4.0 3. Announcement of Silverlight later this week 4. What is the current Trend? Microsoft has done a research with many developers across the globe and have got the following feedback from the users. Get Lost (interrupted) - When we do some work and somebody is calling or interrepting by someother way we lose track of what we were doing and we need to do from the start Falling Behind- Technology gets updated  phenomenally over a period of time and developers always have a scenario like they are not in the state of the art technology and they always have a doubt whether they are staying updated. Lack of Collobaration - When a Manager asks a person what the team members have done and some might be done and some might not be and finally all are into a state like we dont know where we are. So they have addressed these 3 points in the VS 2010 by the following features : Get Lost - Some cool features which could overcome this. We have some Graphical interface. which could show what we have done and where we are. Some Zoom features in the code level. Falling Behind - Everything is based on .NET language base. 2010 has been built in such a way that if developers know the native language that's enough for building good applications. Lack of Collobaration - Some Dashboard Features which would show where exactly the project is. And a graphical user interface is shown on clicking which it directly drills down even to the code level. 5. An overview on all new features in VS 2010. 6. Some good demos of new features in VS 2010 by Polita and one more girl. Some of the new features included : 1. Team Explorer 2. Zoom in Code 3. Ribbon Development 4. Development in Single Platform for Windows Phone, XBox, Zune, Azure, Web Based and Windows based applications 5. Sequence Diagram Generation directly from code 6. Dashboards to show project status 7. Javascript and JQuery intellisense 8. Native support for JQuery 9. Packaging feature while deploying. 10. Generation of different versions of web.config like Web.Config.Production, Web.Config.Staging, etc. 11. IntelliTrace - Eliminating the "Not Reproducible" statement. 12. Automated User Interface Testing. At last in the closing of the day we had a great event called Demo Extravaganza, where lot of cool projects that were launched by Microsoft and also the projects that are under research were also shown. I got a lot of info about Bing today. BING really rocks!!! It has the following : 1. Visual Search 2. Product based search. For each product different menu filters were provided to make an advanced search 3. BING Maps was awesome!! It zoomed in to the street level and we can assume that we are the persons who are walking or running on the road and we can see the real objects like buildings moving by our side. 4. PhotoSynth was used in BING to show up all the images taken around the globe in a 3D format. 5. Formula - If we give some formula it automatically gives the value for the variable or derivation of expression Also some info about some kool touch apps which does an authentication and computation of Teched Attendee's Points that they have scored and the sessions attended. One guy won an XBOX in lucky draw as a gift. There were lot of Partner Stalls like Accenture,Intel,Citrix,MicroFocus,Telerik,infragistics,Sapient etc. Some Offers were provided for us like 50% off on Certifications, 1 free Elearning Course, etc. Stay tuned!! Wil update you on other events too..

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• Identify memory leak in Java app

  - by Vincent Ma

  One important advantage of java is programer don't care memory management and GC handle it well. Maybe this is one reason why java is more popular. As Java programer you real dont care it? After you meet Out of memory you will realize it it’s not true. Java GC and memory is big topic you can get some information in here Today just let me show how to identify memory leak quickly. Let quickly review demo java code, it’s one kind of memory leak in our code, using static collection and always add some object. import java.util.ArrayList;import java.util.List; public class MemoryTest { public static void main(String[] args) { new Thread(new MemoryLeak(), "MemoryLeak").start(); }} class MemoryLeak implements Runnable { public static List<Integer> leakList = new ArrayList<Integer>(); public void run() { int num =0; while(true) { try { Thread.sleep(1); } catch (InterruptedException e) { } num++; Integer i = new Integer(num); leakList.add(i); } }} run it with java -verbose:gc -XX:+PrintGCDetails -Xmx60m -XX:MaxPermSize=160m MemoryTest after about some minuts you will get Exception in thread "MemoryLeak" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2760) at java.util.Arrays.copyOf(Arrays.java:2734) at java.util.ArrayList.ensureCapacity(ArrayList.java:167) at java.util.ArrayList.add(ArrayList.java:351) at MemoryLeak.run(MemoryTest.java:25) at java.lang.Thread.run(Thread.java:619)Heap def new generation total 18432K, used 3703K [0x045e0000, 0x059e0000, 0x059e0000) eden space 16384K, 22% used [0x045e0000, 0x0497dde0, 0x055e0000) from space 2048K, 0% used [0x055e0000, 0x055e0000, 0x057e0000) to space 2048K, 0% used [0x057e0000, 0x057e0000, 0x059e0000) tenured generation total 40960K, used 40959K [0x059e0000, 0x081e0000, 0x081e0000) the space 40960K, 99% used [0x059e0000, 0x081dfff8, 0x081e0000, 0x081e0000) compacting perm gen total 12288K, used 2083K [0x081e0000, 0x08de0000, 0x10de0000) the space 12288K, 16% used [0x081e0000, 0x083e8c50, 0x083e8e00, 0x08de0000)No shared spaces configured. OK let us quickly identify it using JProfile Download JProfile in here  Run JProfile and attach MemoryTest get largest size of  Objects in Memory View in here is Integer then select Integer and go to Heap Walker. get GC Graph for this object  Then you get detail code raise this issue quickly now.  That is enjoy it.

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• Spring MVC vs raw servlets and template engine?

  - by Gigatron

  I've read numerous articles about the Spring MVC framework, and I still can't see the benefits of using it. It looks like writing even a simple application with it requires creating a big hodgepodge of XML files and annotations and other reams of code to conform to what the framework wants, a whole bunch of moving parts to accomplish a simple single task. Any time I look at a Spring example, I can see how I can write something with the same functionality using a simple servlet and template engine (e.g. FreeMarker, StringTemplate), in half the lines of code and little or no XML files and other artifacts. Just grab the data from the session and request, call the application domain objects if necessary, pass the results to the template engine to generate the resulting web page, done. What am I missing? Can you describe even one example of something that is actually made simpler with Spring than using a combination of raw servlets with a template engine? Or is Spring MVC just one of those overly complicated things that people use only because their boss tells them to use it?

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• Runescape Private Server - How does it work?

  - by Friend of Kim

  I've seen a lot of Runescape private servers lately. How do they work? Most of them are based on the old Runescape, but a few look exactly like the real Runescape. How do they make the servers? Has the source code of the game been leaked on several occasions, and is that used to make Runescape servers? Or have some people just replicated Runescape, and tried to make the same game themselves (and "stolen" the 3D objects and texture from Jagex to make it look the same, and written the code to be able to replicate most functions of Runescape)?

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