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• Top 10 things I Learned this October

  - by rbewtra

  Last week, I attended the second largest IT conference. It was Gartner Symposium IT Expo held in Orlando, Florida. Earlier this month, I also had the opportunity to be part of the largest IT conference earlier in the month – Oracle Open World . Both were gatherings for senior IT professionals – CIOs, Senior IT  and Line of Business executives, and Developers. At both events, I learned a great deal about how companies are innovating and leveraging technology.  Here are my top 10 take-aways: #10.  Everyone is talking about Social, Mobile and Cloud  - Whether listening to Gartner discuss The Nexus of Forces or listening to Oracle’s Executive Vice President Hasan Rizvi deliver Oracle Fusion Middleware General Session  -- everyone is talking about Social, Mobile Cloud, and Information – Gartner, Oracle, our customers, partners, -- everyone.   #9. SOA is NOT dead, it is more important than ever before – it is an imperative!  #8. The big question around IT security is not “what will you do IF?” but “what will you do WHEN?” #7. General Colin Powell is an IT guy! Aside from having served as National Security Advisor, Chairman of the Joint Chiefs of Staff and as the U.S. Secretary of State. Gen Colin Powell was an inspirational speaker at the Gartner Symposium and it was clear he understands IT and the powerful impact it has on our society and our youth today. #6. Change will happen, we need to plan for it! #5. When everything is connected and just works, we have harnessed the power of technology. Middleware is at the heart of social, mobile and cloud. #4. Innovation is happening everywhere! Attending both IT events I was able to hear from companies of all sizes and across industries – including Tesco, Nike, Electronic Arts, Nintendo, International Speedway--  they all discussed how they are transforming their companies and their industries. #3. “One size fits all” strategy does not work instead it alienates IT and business. The PACE Layered Application Strategy is a framework that allows IT to have that Nexus of Forces conversation with the business. #2. To stay relevant, we need to hire the innovation workers, develop for that innovation layer. #1. My smartphone is the most valuable tool I own! Everyday with it, I am able to communicate via phone, email, text with family, friends, colleagues. I am able to look up directions to my hotel, make reservations at restaurants, view my calendar, take pictures, record messages, check in for flights and so much more…. I can never leave home without it. Look forward to catching up again soon! Additional Information Product Information on Oracle.com: Oracle Fusion Middleware Follow us on Twitter and Facebook Subscribe to our regular Fusion Middleware Newsletter

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• Why LINQ to Entities won't let me initialize just some properties of an Entity?

  - by emzero

  So I've started to add Entity Framework 4 into a legacy web application (ASP.NET WebForms). As a start I have auto-generated some entities from the database. Also I want to apply Repository Pattern. There is an entity called Visitor and its repository VisitorRepository In VisitorRepository I have the following method: public IEnumerable<Visitor> GetActiveVisitors() { var visitors = from v in _context.Visitors where v.IsActive select new Visitor { VisitorID = v.VisitorID, EmailAddress = v.EmailAddress, RegisterDate = v.RegisterDate, Company = v.Company, Position = v.Position, FirstName = v.FirstName, LastName = v.LastName }; return visitors.ToList(); } That List is then bound to a repeater and when trying to do <%# Eval('EmailAddress') #%> it throws the following exception. The entity or complex type 'Model.Visitor' cannot be constructed in a LINQ to Entities query. A) Why is this happening? How I can workaround this? Do I need to select an anonymous type and then use that to initialize my entities??? B) Why every example I've seen makes use of 'select new' (anonymous object) instead of initializing a known type? Anonymous types are useless unless you are retrieving the data and showing it in the same layer. As far as I know anonymous types cannot be returned from methods? So what's the real point of them??? Thank you all

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• Exception on SslStream.AuthenticateAsClient (The message was badly formatted)

  - by Noms

  I have got wierd problem going on. I am trying to connect to Apple server via TCP/SSL. I am using a Client certificate provided by Apple for push notifications. I installed the certificate on my server (Win2k3) in both Local Trusted Root certificates and Local Personal Certificates folder. Now I have a class library that deals with that connection, when i call this class library from a console application running from the server it works absolutely fine, but when i call that class library from an asp.net page or asmx web service I get the following exception. A call to SSPI failed, see inner exception. The message received was unexpected or badly formatted. This is my code: X509Certificate cert = new X509Certificate(certificateLocation, certificatePassword); X509CertificateCollection certCollection = new X509CertificateCollection(new X509Certificate[1] { cert }); // OPEN the new SSL Stream SslStream ssl = new SslStream(client.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null); ssl.AuthenticateAsClient(ipAddress, certCollection, SslProtocols.Default, false); ssl.AuthenticateAsClient is where the error gets thrown. This is driving me nuts. If the console application can connect fine, there must be some problem with asp.net network layer security that is failing the authentication... not sure, perhaps need to add something or some sort of security policy in the web.config. Also just to point out that i can connect fine on my local development machine both with console and website. Anyone has got any ideas?

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• Rendering a UIWebView in drawRect with loadHTMLString

  - by Nick Weaver

  Hello there, I am having a problem with UIWebView. I'd like to render my own html code in it. When I add a webview as a subview and put in some html code it renders just fine. When it gets down to some optimized drawing of tableview cell with the drawRect method the problem pops up. Drawing UIView descendants works pretty well this way. It's even possible to load a URL with the loadRequest method, setting the delegate, conforming to the UIWebViewDelegate protocol and redrawing the table cell with setNeedsDisplay when webViewDidFinishLoad is called. It does show, but when it comes to loadHTMLString, nothing shows up, only a white rect. Due to performance reasons I have to do the drawing in the drawRect method. Any ideas? Thanks in advance Nick Example snippet code for the html code being loaded by a UIWebView: NSString *html = @"<html><head><title>My fancy webview</title></head><body style='background-color:green;'><p>It somehow seems<h2 style='color:black;'>this does not show up in drawRect</h2>!</p></body></html>"; [webView loadHTMLString:html baseURL:nil]; Snippet for the drawRect method: - (void)drawRect:(CGRect)aRect { CGContextRef context = UIGraphicsGetCurrentContext(); [[webView layer] renderInContext:context]; }

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• Iphone page curl effect

  - by dragon

  I am using this code for Page curl effect ....Its work fine in simulator and device... But its not (setType:@"pageCurl") apple documented api , this caused it to be rejected by the iPhone Developer Program during the App Store review process: animation = [CATransition animation]; [animation setDelegate:self]; [animation setDuration:1.0f]; animation.startProgress = 0.5; animation.endProgress = 1; [animation setTimingFunction:UIViewAnimationCurveEaseInOut]; [animation setType:@"pageCurl"]; [animation setSubtype:@"fromRight"]; [animation setRemovedOnCompletion:NO]; [animation setFillMode: @"extended"]; [animation setRemovedOnCompletion: NO]; [[imageView layer] addAnimation:animation forKey:@"pageFlipAnimation"]; So i changed and using like this [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:1]; [UIView setAnimationDelegate:self]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationWillStartSelector:@selector(transitionWillStart:finished:context:)]; [UIView setAnimationDidStopSelector:@selector(transitionDidStop:finished:context:)]; // other animation properties [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:imageView cache:YES]; // set view properties [UIView commitAnimations]; In this above code i want to stop the page curl effect at midway.. But i cant stop it in midway like map applications in ipod... Is this any fix for this? or Is there any apple documented methods used for page curl effect in ipod touch? I am searching lot. but didnt get any answer ? can anyone help me? Thanks in advance..plz

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• Windows 7 - Enable Network DTC Access

  - by Russ Clark

  I have a Visual Studio 2010 Windows Forms application in which I start a transaction using the TransactionScope class. I then Receive a message from a Sql Server Broker Services message queue, which works fine. I next try to call a stored procedure from the same database with a call to my data access layer which is a Visual Studio dataset (xsd file). When I make this second call to the database I get the following error message: The MSDTC transaction manager was unable to pull the transaction from the source transaction manager due to communication problems. Possible causes are: a firewall is present and it doesn't have an exception for the MSDTC process, the two machines cannot find each other by their NetBIOS names, or the support for network transactions is not enabled for one of the two transaction managers. (Exception from HRESULT: 0x8004D02B). I've seen several posts on the web that talk about Enabling DTC access through dcomcnfg.exe, and allowing DTC to communicate through Windows Firewall. I've done those things, and am still having this problem. I know our remote database server is setup to Enable DTC access, because we are using similar transactions in other projects built with Visual Studio 2008 on Windows XP and Vista. I think there is something specific about Windows 7 and Visual Studio 2010 causing this problem, but haven't been able to find out what it is. Can anyone help with this problem?

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• Is Appcelerator Titanium now banned on the iPhone?

  - by altuzar

  This question has been answered quite clearly for MonoTouch here: http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone But what about Appcelerator Titanium? The new TOS from Apple and their iPhone 4 OS: 3.3.1 — Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs. Applications must be originally written in Objective-C, C, C++, or JavaScript as executed by the iPhone OS WebKit engine, and only code written in C, C++, and Objective-C may compile and directly link against the Documented APIs (e.g., Applications that link to Documented APIs through an intermediary translation or compatibility layer or tool are prohibited). Titanium uses JavaScript but is not executed be the iPhone OS WebKit engine directly. In their Developer blog, Jeff Haynie says Titanium is on the clear, but I don't know if they are in denial. It’s our belief that we are fully in compliance with iPhone OS 4.0 ToS as we interpret them. I haven't found any official word by Apple, only opinions. And I'm quite confussed. I'm not writing another line of code for my App until... you know.

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• EF 4, POCO and AddOrUpdate

  - by Eric J.

  I'm trying to create a method on an EF 4 POCO repository called AddOrUpdate. The idea is that the business layer can pass in a POCO object and the persistence framework will add the object if it is new (not yet in the database), else will update the database (once SaveChanges() is called) with the new value. This is similar to some other questions I have asked about EF, but I'm only about 80% there in understanding this so please forgive partial duplication. The part I'm missing is how to update the object graph in my ObjectContext/associated ObjectSet for the passed-in business object once I have determined that the business object indeed already exists in the database (and now has been loaded thanks to TryGetObjectByKey). ApplyCurrentValues sounds sort of like what I want, but it only copies scalar values and doesn't seem intended to update the object graph in the ObjectContext/ObjectSet. Because of my particular use case I don't care about concurrency right now. public void AddOrUpdate(BO biz) { object obj; EntityKey ek = Ctx.CreateEntityKey(mySetName, biz); bool found = Ctx.TryGetObjectByKey(ek, out obj); if (found) { // How do I do what this method name implies? Biz is a parent with children. mySet.TellTheSetToUpdateThisObject(biz); } else { mySet.AddObject(biz); } Ctx.DetectChanges(); }

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• NserviceBus throws exception when referencing a Nettiers assembly

  - by IGoor

  We use nettiers as a our data layer, and we recently have started looking at using NServiceBus, but we have hit a wall. We have a windows service which hosts NSB and references our Nettiers assembly. the service is throwing an exception when the following line is encountered. var Bus = Configure.With().SpringBuilder() .XmlSerializer() .MsmqTransport() .IsTransactional(false) .PurgeOnStartup(false) .UnicastBus() .ImpersonateSender(false) .CreateBus() .Start(); the exceptions that is throw is: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. the loader exception message is: Could not load file or assembly 'Microsoft.Practices.Unity, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.":"Microsoft.Practices.Unity, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 stacktrace is: at System.Reflection.Module._GetTypesInternal(StackCrawlMark& stackMark) at System.Reflection.Assembly.GetTypes() at NServiceBus.Configure.<>c__DisplayClass1.<With>b__0(Assembly a) in d:\BuildAgent-03\work\672d81652eaca4e1\src\config\NServiceBus.Config\Configure.cs:line 122 at System.Array.ForEach[T](T[] array, Action`1 action) at NServiceBus.Configure.With(Assembly[] assemblies) in d:\BuildAgent-03\work\672d81652eaca4e1\src\config\NServiceBus.Config\Configure.cs:line 122 at NServiceBus.Configure.With(IEnumerable`1 assemblies) in d:\BuildAgent-03\work\672d81652eaca4e1\src\config\NServiceBus.Config\Configure.cs:line 111 at NServiceBus.Configure.With(String probeDirectory) in d:\BuildAgent-03\work\672d81652eaca4e1\src\config\NServiceBus.Config\Configure.cs:line 101 at NServiceBus.Configure.With() in d:\BuildAgent-03\work\672d81652eaca4e1\src\config\NServiceBus.Config\Configure.cs:line 78 at MessageSender.Program.Main(String[] args) in C:\Development\NSBTest4\MessageSender\Program.cs:line 18 without the nettiers reference NSB works fine. Any idea what the problem is and how to solve it? thanks.

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• AndroMDA maven code generation and JPA Annotations

  - by ArsenioM

  I am using the AndroMDA plugin for maven to generate code from an uml diagram made in MagicDraw. When the code is generated, AndroMDA desings the JPA annotation for the persitence layer. I think that at the compilation process AndroMDA uses Naming Strategies to determine the Table and Column names for the DataBase. I want to determine how AndroMDA desings this JPA annotations, because I need to display this DataBase names based on the UML entity and atributtes names. I was regarding if there is an API of AndroMDA that I could use to do this by giving it the uml diagram. Or at least, to know the Naming Strategies used by AndroMDA to achive that. AndroMDA at the compilation process design the JPA annotations for the Entities, Attributes, etc that are written in my java classes under a series of rules that exist within the EJB3 cartridge of AndroMDA. (The further Database is created using those JPA annotations). I want to create a program that returns me the same Table and Attributes names wrote on the JPA annotations, by giving it the .xml file of the uml diagram of a project. I was hoping that I could take advantage of the EJB3 cartridge to generate those Tables and Attribute names with my program. One way could be using an API of AndroMDA that do this(if it exits), or at least, by implementing the same rules used by the EJB3 cartridge for that matter. To be more illustrative, For example: If in my uml model I have an Entity called “CompanyGroup”, AndroMDA would generate the following code for the class definition: @javax.persistence.Entity @javax.persistence.Table(name = "COMPANY_GR") Public class CompanyGroup implements java.io.Serializable, Comparable< CompanyGroup This is just an example (not a real case), but nevertheless, the way how AndroMDA do the translation from “CompanyGroup” to “COMPANY_GR” has to be specified somewhere. Hope this explanation is useful enough. Thanks.

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• jquery load and tinymce gives me a "g.win.document is null" on subsequent loads

  - by Patrice Peyre

  So... very excited as first post on stackoverflow I have this page, clicking a button will call editIEPProgram(). editIEPProgram counts how many specific divs exists, adds another div, loads it with html from '/content/mentoring/iep_program.php' and then calls $("textarea.tinymce").tinymce to add a rich text editor to the newly added text boxes. It finally adds a tab which handles the new stuff and bob is your uncle. It ALMOST works. Clicking the button the first adds everything and everything woks, on the second and subsequent click, everything is added but the tinymce fails to initiate (I guess) and gives me "g.win.document is null". I have been on it for some time now and losing all my sanity. please, help.me. function editIEPProgram(){ var index = $("div[id^=iep_program]").size(); var target_div = "iep_program_"+index; $("#program_container") .append( $("<div></div>") .attr("id", target_div) .addClass("no_overflow_control") ); $("#"+target_div).load ( "/content/mentoring/iep_program.php", {index:index}, function() { $("textarea.tinymce").tinymce({ script_url: "/scripts/tiny_mce.js",height:"60", theme:"advanced",skin:"o2k7",skin_variant : "silver", plugins : "spellchecker,advlist,preview,pagebreak,style,layer,save,advhr,advimage,advlink,searchreplace,paste,noneditable,visualchars,nonbreaking,xhtmlxtras", theme_advanced_buttons1 : "spellchecker,|,bold,italic,underline,strikethrough,|,formatselect,|,forecolor,backcolor,|,bullist,numlist,|,outdent,indent,|,undo,redo,|,link,unlink,image,cleanup,preview", theme_advanced_buttons2 : "", theme_advanced_buttons3 : "", theme_advanced_toolbar_location : "top", theme_advanced_toolbar_align : "left", content_css : "/css/main.css" }); }); $("#tab_container") .tabs("add", "#"+target_div,"New program") .tabs("select", $("#tab_container").tabs("length")-1); }

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• Write-only collections in MongoDB

  - by rcoder

  I'm currently using MongoDB to record application logs, and while I'm quite happy with both the performance and with being able to dump arbitrary structured data into log records, I'm troubled by the mutability of log records once stored. In a traditional database, I would structure the grants for my log tables such that the application user had INSERT and SELECT privileges, but not UPDATE or DELETE. Similarly, in CouchDB, I could write a update validator function that rejected all attempts to modify an existing document. However, I've been unable to find a way to restrict operations on a MongoDB database or collection beyond the three access levels (no access, read-only, "god mode") documented in the security topic on the MongoDB wiki. Has anyone else deployed MongoDB as a document store in a setting where immutability (or at least change tracking) for documents was a requirement? What tricks or techniques did you use to ensure that poorly-written or malicious application code could not modify or destroy existing log records? Do I need to wrap my MongoDB logging in a service layer that enforces the write-only policy, or can I use some combination of configuration, query hacking, and replication to ensure a consistent, audit-able record is maintained?

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• MVC2 Apps (and others) sharing WCF services and authentication

  - by stupid-phil

  Hi, I've seen several similar scenarios explained here but not my particular one. I wonder if someone could tell me which direction to go in? I am developing two (and more later) MVC2 apps. There will also be another (thicker) client later on (WPF or Silverlight, TBD). These all need to share the same authentication. For the MVC2 apps they (preferably) need to be single log on - ie if a user logs in to one MVC2 app, they should be authorised on the other, as long as the cookie hasn't timed out. Forms authentication is to be used. All the apps need to use common business functionality and perform db access via a common WCF Service App. It would be nice (I think) if the WCF is not publicly accessible (ie blocked behind FW). The thicker client could use an additional service layer to access the Common WCF App. What this should look like is: MVCApp1 - WCFAppCommon MVCApp2 - WCFAppCommon ThickClient - WCFApp2 - WCFAppCommon Is it possible to carry out all the authentication/authorization in the WCFAppCommon? Otherwise I think I'll have to repeat all the security logic in the MVCApps and WCFApp2, whereas, to me, it seems to sit naturally in WCFAppCommon. On the otherhand, it seems if I authenticate/authorize in WCFAppCommon, I wouldn't be able to use Forms Authentication. Where I've seen possible solutions (that I haven't tried yet) they seem much more complex than Forms Authentication and a single DB. Any help appreciated, Phil

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• Interface Builder is unable to open documents of type iPad XIB.

  - by sagar

  After installing SDK 3.2 Beta 5 on your MAC. Please follow this steps to understand my problem. Start XCode. Click on Help Menu - Select Developer Documentation from the toolbar of window - Click on Home - & select iPhone OS 3.2 Library On the left side of screen - you can see Cocoa Touch Layer Category under Frameworks Select UIKit from it. On right side you will have - ToolbarSeach - as an first one link on it. Click on it. After clicking on it - You will see an option of "Open Project in xCode" on the title. Click on it & save the project to open it. Now, Click on run to execute this sample code. After compilation - it will give you two errors. something like this - "Interface Builder is unable to open documents of type iPad XIB." I don't know why this error is disturbing me? What should be solution to resolve it? Sagar.

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• Crazy idea: Connect .NET and SAP with SAP JCo using IKVM.NET

  - by Kottan

  Because the SAP Connector for .NET is no longer maintained by SAP, I am now looking for an alternative to connect the Microsoft world with the SAP world. I know there a third party products like ERPConnect, but I want to do this with tools from SAP. Therefore there arised the crazy idea to use the SAP Java Connector in combination with the tool IKVM.NET (www.ikvm.net/devguide/net2java.html). IKVM.NET provides The IKVMC tool, which converts Java bytecode to .NET dll's and exe's. "No sooner said than done!" I converted the SAP JCo to .NET dlls and created a new Visual Studio solution. I put all the JCO files into a subdirectory of my solution. I set 2 references to the generated IKVM.OpenJDK.Core.dll and sapjco.dll. Great, all JCO classes where now available as .NET classes. Full of optimism I wrote some little code to connect to a SAP system. JCO.Client client = null; client = JCO.createClient(...) The compiliation of my testcode had no errors. "Wonderful !" I thought. Then I started my tetstapplication. Unfortunately I got an exception calling JCO.createClient: Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'\r\nno sapjcorfc in java.library.path I have 2 questions on this topic. 1) Do you think my idea using SAP Java Connector to connect .NET with SAP is a good idea or is it nonsens ? Perhaps someone had already the same idea ;-) 2) How can the above exception be solved ?

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• C# Design How to Elegantly wrap a DAL class

  - by guazz

  I have an application which uses MyGeneration's dOODads ORM to generate it's Data Access Layer. dOODad works by generating a persistance class for each table in the database. It works like so: // Load and Save Employees emps = new Employees(); if(emps.LoadByPrimaryKey(42)) { emps.LastName = "Just Got Married"; emps.Save(); } // Add a new record Employees emps = new Employees(); emps.AddNew(); emps.FirstName = "Mr."; emps.LastName = "dOOdad"; emps.Save(); // After save the identity column is already here for me. int i = emps.EmployeeID; // Dynamic Query - All Employees with 'A' in thier last name Employees emps = new Employees(); emps.Where.LastName.Value = "%A%"; emps.Where.LastName.Operator = WhereParameter.Operand.Like; emps.Query.Load(); For the above example(i.e. Employees DAL object) I would like to know what is the best method/technique to abstract some of the implementation details on my classes. I don't believe that an Employee class should have Employees(the DAL) specifics in its methods - or perhaps this is acceptable? Is it possible to implement some form of repository pattern? Bear in mind that this is a high volume, perfomacne critical application. Thanks, j

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• NHibernate: Mapping different dynamic components based on a discriminator

  - by George Mauer

  My domain entities each have a set of "fixed" properties and a set of "dynamic" properties which can be added at runtime. I handle this by using NHibernate's dynamic-component functionality. public class Product { public virtual Guid Id { get; } public virtual string Name { get; set;} public virtual IDictionary DynamicComponents { get; } } Now I have the following situation public class Customer { public virtual Guid Id { get; } public virtual string Type { get; set;} public virtual IDictionary DynamicProperties { get; } } Where a CustomerType is something like "Online" or "InPerson". Furthermore an Online customer has dynamic properties "Name" and "IPAddress" and an InPerson Customer has dynamic properties "Name" and "Salesman". Which customer types are available and the extra properties on them are configured in meta-data which is used to generate hbm files on application start. I could figure out some way to knock this together using an intermediate DTO layer, but is there any support in NHibernate for this scenario? The only difficulty seems to be that all the different "types" of customer map to the same Customer class.

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• Safari flash wmode not working - anything wrong with this embed?

  - by hfidgen

  I've got a problem with this embed in Safari. It works just fine on all other browsers, IE6 included. The problem is that the embed seems to jump to the very top layer, ignoring all z-index or positioning statements. This is important, because several html design features are overlayed on the flash. This embed was written to work with swfobject, but still doesnt work when: swfobject disabled wmode = transparent/opaque/removed entirely Is this a problem with safari or the code? And if it's the code then what does safari do differently to all the other browsers? Bah. Thanks for any help ;) <object id="Flash_Banner" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="950" height="400" title=""> <param name="movie" value="ui.swf" /> <param name="quality" value="high" /> <param name="wmode" value="opaque" /> <!--[if !IE]>--> <object type="application/x-shockwave-flash" data="ui.swf" width="950" height="400" title=""> <param name="quality" value="high" /> <param name="wmode" value="opaque" /> <!--<![endif]--> <div id="banner_slider"><img src="images/banners/case.jpg" width="950" height="400" alt="" /></div> <!--[if !IE]>--> </object> <!--<![endif]--> </object>

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• Setting up an efficient and effective development process

  - by christopher-mccann

  I am in the midst of setting up the development environment (PHP/MySQL) for my start-up. We use three sets of servers: LIVE - the servers which provide the actual application TEST - providing a testing version before it is actually released DEV - the development servers The development servers run SVN with each developer checking out their local copy. At the end of each day completed fixes are checked in and then we use Hudson to automate our build process and then transfer it over to TEST. We then check the application still functions correctly using a tester and then if everything is fine move it to LIVE. I am happy with this process but I do have two questions: How would you recommend we do local testing - as each developer adds new pages or changes functionality I want them to be able to test what they are doing. Would you just setup local Apache and a local database and have them test locally on their own machine? How would you recommend dealing with data layer changes? Is there anything else you would recommend doing to really make our development process as easy and efficient as possible? Thanks in advance

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• How do you handle 'SelectedItemChanged' events in a MVVM ViewModel?

  - by Travis

  I have some logic that depends upon two properties being set, as it executes when both properties have a value. For example: private void DoCalc() { if (string.IsNullOrEmpty(Property1) || string.IsNullOrEmpty(Property2)) return; Property3 = Property1 + " " + Property2; } That code would need to be executed every time Property1 or Property2 changed, but I'm having trouble figuring out how to do it in a stylistically acceptable manner. Here are the choices as I see them: 1) Call method from ViewModel I don't have a problem with this conceptually, as the logic is still in the ViewModel - I'm not a 'No code-behind' nazi. However, the 'trigger' logic (when either property changes) is still in the UI layer, which I don't love. The codebehind would look like this: void ComboBox_Property1_SelectedItemChanged(object sender, RoutedEventArgs e) { viewModel.DoCalc(); } 2) Call method from Property Setter This approach seems the most 'pure', but it also seems ugly, as if the logic is hidden. It would look like this: public string Property1 { get {return property1;} set { if (property1 != value) { property1 = value; NotifyPropertyChanged("Property1"); DoCalc(); } } } 3) Hook into the PropertyChanged event I'm now thinking this might be the right approach, but it feels weird to hook into the property changed event in the implementing viewmodel. It would look something like this: public ViewModel() { this.PropertyChanged += new PropertyChangedEventHandler(ViewModel_PropertyChanged); } void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e) { if (e.PropertyName == "Property1" || e.PropertyName == "Property2") { DoCalc(); } } So, my question is, if you were browsing through some source code with that requirement, which approach would you prefer to see implemented (and why?). Thanks for any input.

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• Custom GTK widget to bypass GTK layout engine?

  - by fret

  I have an application layer that I'd like to port to Gtk that has all it's own layout code and I don't really want to spend 'n' months re-writting it to work with the Gtk layout system, but rather just using the existing internal layout code and have Gtk render the resulting widgets. I've started by writting my own widget after trying several of the built in containers. Basically I'm looking for something like the GtkFixed container that doesn't have a minimum size, i.e. Gtk will fit the first widget to the entire window, and all the child widgets will lay themselves out so that they fill the area. If I use GtkFixed for that, the window is always limited to the size of the initial layout, as thats the "requested" space. I can't resize it smaller than that using the edges of the window decor. Maybe I need schooling in allocation vs requesting. My googling so far hasn't found the information I need to make this work. I did try. I'm using the C api at the moment, and I'm targetting Win32 and Linux. So far I have a shell app working in Win32 that puts up an empty window. But the first child widget is limiting the resizing to it's initial size.

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• 'ErrorMessageResourceType' property specified was not found. on XmlSerialise

  - by Redeemed1

  In my ASP.Net MVC app I have a Model layer which uses localised validation annotations on business objects. The code looks like this: [XmlRoot("Item")] public class ItemBo : BusinessObjectBase { [Required(ErrorMessageResourceName = "RequiredField", ErrorMessageResourceType = typeof(StringResource))] [HelpPrompt("ItemNumber")] public long ItemNumber { get; set; } This works well. When I want to serialise the object to xml I get the error: "'ErrorMessageResourceType' property specified was not found" (although it is lost beneath other errors, it is the innerexception I am trying to work on. The problem therefore is the use of the DataAnnotations attributes. The relevant resource files are in another assembly and are marked as 'public' and as I said everything works well until I get to serialisation. I have references to the relevant DataAnnotations class etc in my nunit tests and target class. By the way, the HelpPrompt is another data annotation I have defined elsewhere and is not causing the problem. Furthermore if I change the Required attribute to the standard format as follows, the serialisation works ok. [Required(ErrorMessage="Error")] Can anyone help me?

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• HSQLdb permissions regarding OpenJPA

  - by wishi_

  Hi! I'm (still) having loads of issues with HSQLdb & OpenJPA. Exception in thread "main" <openjpa-1.2.0-r422266:683325 fatal store error> org.apache.openjpa.persistence.RollbackException: user lacks privilege or object not found: OPENJPA_SEQUENCE_TABLE {SELECT SEQUENCE_VALUE FROM PUBLIC.OPENJPA_SEQUENCE_TABLE WHERE ID = ?} [code=-5501, state=42501] at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:523) at model_layer.EntityManagerHelper.commit(EntityManagerHelper.java:46) at HSQLdb_mvn_openJPA_autoTables.App.main(App.java:23) The HSQLdb is running as a server process, bound to port 9001 at my local machine. The user is SA. It's configured as follows: <persistence-unit name="HSQLdb_mvn_openJPA_autoTablesPU" transaction-type="RESOURCE_LOCAL"> <provider> org.apache.openjpa.persistence.PersistenceProviderImpl </provider> <class>model_layer.Testobjekt</class> <class>model_layer.AbstractTestobjekt</class> <properties> <property name="openjpa.ConnectionUserName" value="SA" /> <property name="openjpa.ConnectionPassword" value=""/> <property name="openjpa.ConnectionDriverName" value="org.hsqldb.jdbc.JDBCDriver" /> <property name="openjpa.ConnectionURL" value="jdbc:hsqldb:hsql://localhost:9001/mydb" /> <!-- <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)" /> --> </properties> </persistence-unit> I have made a successful connection with my ORM layer. I can create and connect to my EntityManager. However each time I use EntityManagerHelper.commit(); It faila with that error, which makes no sense to me. SA is the Standard Admin user I used to create the table. It should be able to persist as this user into hsqldb.

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• ASP.NET MVC2 and MemberShipProvider: How well do they go together?

  - by Sparhawk

  I have an existing ASP.NET application with lots of users and a large database. Now I want to have it in MVC 2. I do not want to migrate, I do it more or less from scratch. The database I want to keep and not touch too much. I already have my database tables and I also want to keep my LINQ to SQL-Layer. I didn't use a MembershipProvider in my current implementation (in ASP.NET 1.0 that wasn't strongly supported). So, either I write my own Membershipprovider to meet the needs of my database and app or I don't use the membershipprovider at all. I'd like to understand the consequences if I don't use the membership provider. What is linked to that? I understand that in ASP.NET the Login-Controls are linked to the provider. The AccountModel which is automatically generated with MVC2 could easily be changed to support my existing logic. What happens when a user is identified by a an AuthCookie? Does MVC use the MembershipProvider then? Am I overlooking something? I have the same questions regarding RoleProvider. Input is greatly appreciated.

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• Thrift,.NET,Cassandra - Is this is right combination?

  - by Vadi

  I've been evaluating technology stack for developing a social network based application. Below are the stack I think could well suitable for this application type of application: GUI -- ASP.NET MVC, Flash (Flex) Business Services -- Thrift based services One of the advantage of using Thrift is to solve scaling problems that will come in future when the user base increases rapidly. All the business logic can be exposed as a services using REST,JSON etc., This also allows us to go with C++ or Erlang based services when situation demands. Database -- mySQL, CasSandara mySQL can be used for storing the data which needs to be persisted. Cassandara will be used for storing global identifiers to the persisted data. Since Cassandara is also very good at scaling by introducing more nodes this will leverage Thrift based services as well. And also there is native support between Cassandara and Thrift Cache Server -- Memcached Any requests from Business Services will only talk to Memcached if any non-dirty data is required, otherwise there will be some background jobs that will invalidate the cache from database. The question is: Is the Thrift which is open-sourced one is production-ready? Is it the right stack for services layer to choose when the application (GUI) is primarily gets developed in ASP.NET and DB is mysql? Is there any other caveats that anyone here experienced? One of the main objective behind this stack is to easily scale up with more nodes and also this helps us to use Linux boxes, it will reduce our cost significantly Thoughts please ..

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