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• Silverlight Cream for March 10, 2011 -- #1058

  - by Dave Campbell

  In this Issue: Ian T. Lackey, Peter Kuhn, WindowsPhoneGeek(-2-), Jesse Liberty(-2-), Martin Krüger, John Papa, Jeremy Likness, Karl Shifflett, and Colin Eberhardt. Above the Fold: Silverlight: "Silverlight TV 65: 3D Graphics" John Papa WP7: "Developing a Windows Phone 7 Jump List Control" Colin Eberhardt Shoutouts: Telerik announced a special sale on their RadControls for WP7... check it out: RadControls for Windows Phone 7 - on Sale from March 16th at a Special Promo Price! From SilverlightCream.com: Prism BootStrapper Load ModuleCatalog Ansyc Ian T. Lackey has a post up about reading the module catalog for Prism from an XML file asynchronously... fun stuff... this is how we kick-started our app... XNA for Silverlight developers: Part 6 - Input (accelerometer) Peter Kuhn has Part 6 of his XNA for Silverlight devs up at SilverlightShow. This post is on the use of the accelerometer... some great diagrams and explanations of it's use along with some code to play with... including a 'problems and pitfalls' section, and some good external links. Getting Started with Unit Testing in Silverlight for WP7 WindowsPhoneGeek has an introduction to Unit Testing in general, and then moves into Unit Testing in Silverlight for WP7, providing 3 options with links to the materials and code demonstrating the concepts. Using DockPanel in WP7 Responding to reader's questions, WindowsPhoneGeek's next post is on the DockPanel from the Silverlight Toolkit, and using it in WP7... defined declaratively and in code. Reactive Extensions–More About Chaining Jesse Liberty has post number 10 on Rx up and is a follow-on to the last one on Chaining. This time he exercises the chaining aspect of SelectMany. Yet Another Podcast #26–Walt Ritscher In his next post, Jesse Liberty has his 26th 'Yet Another Podcast' up and is chatting with my friend Walt Ritscher. If you don't know who Walt is, check out the links Jesse has on the post... I'm sure you've crossed paths. How to: Create A half square from a regular polygon (triangle) Martin Krüger demonstrates the exact placement of a half-square (isosceles right triangle), formed with a regular polygon in Blend... this is much more involved than I've made it sound... check out his post. Silverlight TV 65: 3D Graphics John Papa has Silverlight TV number 65 up and it's all about the 3D graphics stuff we saw at the Firestarter. John is talking with Danny Riddel, the CEO of Archetype, the company that built the awesome 3D demo we all gushed over. Jounce Part 12: Providing History-Based Back Navigation Jeremy Likness has part 12 of his Jounce exploration up... and discussing the stack of navigated pages that Jounce retains and providing a 'go back' functionality... and provides a good example of using it all. Prism 4 Region Navigation with Silverlight Frame Navigation and Unity Karl Shifflett has a post for all us Prism afficianados... Prism, Unity, and the Silverlight Frame Navigation framework. Some great external links for 'required reading' too. Developing a Windows Phone 7 Jump List Control Colin Eberhardt has an awesome tutorial up for creating a JumpList control for WP7... what a bunch of effort... this is a step-by-step description of designing the control he built and blogged about a while back... and it's still cool! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• What is the SharePoint Action Framework and Why do I need it ?

  - by SAF

  For those out there that are a little curious as to whether SAF is any use to your organisation, please read this FAQ.  What is SAF ? SAF is free to use. SAF is the "SharePoint Action Framework", it was built by myself and Hugo (plus a few others along the way). SAF is written entirely in C# code available from : http://saf.codeplex.com.   SAF is a way to automate SharePoint configuration changes. An Action is a command/class/task/script written in C# that performs a unit of execution against SharePoint such as "CreateWeb"  or "AddLookupColumn". A SAF Macro is collection of one or more Actions. SAF Macro can be run from Msbuild, a Feature, StsAdm or common plain old .Net code. Parameters can be passed to a Macro at run-time from a variety of sources such as "Environment Variable", "*.config", "Msbuild Properties", Feature Properties, command line args, .net code. SAF emits lots of trace statements at run-time, these can be viewed using "DebugView". One Action can pass parameters to another Action. Parameters can be set using Expression Syntax such as "DateTime.Now".  You should consider SAF is you suffer from one of the following symptoms... "Our developers write lots of code to deploy changes at release time - it's always rushed" "I don't want my developers shelling out to Powershell or Stsadm from a Feature". "We have loads of Console applications now, I have lost track of where they are, or what they do" "We seem to be writing similar scripts against SharePoint in lots of ways, testing is hard". "My scripts often have lots of errors - they are done at the last minute". "When something goes wrong - I have no idea what went wrong or how to solve it". "Our Features get stuck and bomb out half way through - there no way to roll them back". "We have tons of Features now - I can't keep track". "We deploy Features to run one-off tasks" "We have a library of reusable scripts, but, we can only run it in one way, sometimes we want to run it from MSbuild and a Feature". "I want to automate the deployment of changes to our development environment". "I would like to run a housekeeping task on a scheduled basis"   So I like the sound of SAF - what's the problems ?  Realistically, there are few things that need to be considered: Someone on your team will need to spend a day or 2 understanding SAF and deciding exactly how you want to use it. I would suggest a Tech Lead, SysAdm or SP Architect will need to download it, try out the examples, look through the unit tests. Ask us questions. Although, SAF can be downloaded and set to go in a few minutes, you will still need to address issues such as - "Do you want to execute your Macros in MsBuild or from a Feature ?" You will need to decide who is going to do your deployments - is it each developer to themself, or do you require a dedicated Build Manager ? As most environments (Dev, QA, Live etc) require different settings (e.g. Urls, Database names, accounts etc), you will more than likely want to define these and set a properties file up for each environment. (These can then be injected into Saf at run-time). There may be no Action to solve your particular problem. If this is the case, suggest it to us - we can try and write it, or write it yourself. It's very easy to write a new Action - we have an approach to easily unit test it, document it and author it. For example, I wrote one to deploy  a WSP in 2 hours the other day. Alternatively, Saf can also call Stsadm commands and Powershell scripts.   Anyway, I do hope this helps! If you still need help, or a quick start, we can also offer consultancy around SAF. If you want to know more give us a call or drop an email to [email protected]

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• Need WIF Training?

  - by Your DisplayName here!

  I spend numerous hours every month answering questions about WIF and identity in general. This made me realize that this is still quite a complicated topic once you go beyond the standard fedutil stuff. My good friend Brock and I put together a two day training course about WIF that covers everything we think is important. The course includes extensive lab material where you take standard application and apply all kinds of claims and federation techniques and technologies like WS-Federation, WS-Trust, session management, delegation, home realm discovery, multiple identity providers, Access Control Service, REST, SWT and OAuth. The lab also includes the latest version of the thinktecture identityserver and you will learn how to use and customize it. If you are looking for an open enrollment style of training, have a look here. Or contact me directly! The course outline looks as follows: Day 1 Intro to Claims-based Identity & the Windows Identity Foundation WIF introduces important concepts like conversion of security tokens and credentials to claims, claims transformation and claims-based authorization. In this module you will learn the basics of the WIF programming model and how WIF integrates into existing .NET code. Externalizing Authentication for Web Applications WIF includes support for the WS-Federation protocol. This protocol allows separating business and authentication logic into separate (distributed) applications. The authentication part is called identity provider or in more general terms - a security token service. This module looks at this scenario both from an application and identity provider point of view and walks you through the necessary concepts to centralize application login logic both using a standard product like Active Directory Federation Services as well as a custom token service using WIF’s API support. Externalizing Authentication for SOAP Services One big benefit of WIF is that it unifies the security programming model for ASP.NET and WCF. In the spirit of the preceding modules, we will have a look at how WIF integrates into the (SOAP) web service world. You will learn how to separate authentication into a separate service using the WS-Trust protocol and how WIF can simplify the WCF security model and extensibility API. Day 2 Advanced Topics:  Security Token Service Architecture, Delegation and Federation The preceding modules covered the 80/20 cases of WIF in combination with ASP.NET and WCF. In many scenarios this is just the tip of the iceberg. Especially when two business partners decide to federate, you usually have to deal with multiple token services and their implications in application design. Identity delegation is a feature that allows transporting the client identity over a chain of service invocations to make authorization decisions over multiple hops. In addition you will learn about the principal architecture of a STS, how to customize the one that comes with this training course, as well as how to build your own. Outsourcing Authentication:  Windows Azure & the Azure AppFabric Access Control Service Microsoft provides a multi-tenant security token service as part of the Azure platform cloud offering. This is an interesting product because it allows to outsource vital infrastructure services to a managed environment that guarantees uptime and scalability. Another advantage of the Access Control Service is, that it allows easy integration of both the “enterprise” protocols like WS-* as well as “web identities” like LiveID, Google or Facebook into your applications. ACS acts as a protocol bridge in this case where the application developer doesn’t need to implement all these protocols, but simply uses a service to make it happen. Claims & Federation for the Web and Mobile World Also the web & mobile world moves to a token and claims-based model. While the mechanics are almost identical, other protocols and token types are used to achieve better HTTP (REST) and JavaScript integration for in-browser applications and small footprint devices. Also patterns like how to allow third party applications to work with your data without having to disclose your credentials are important concepts in these application types. The nice thing about WIF and its powerful base APIs and abstractions is that it can shield application logic from these details while you can focus on implementing the actual application. HTH

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• Thinking Local, Regional and Global

  - by Apeksha Singh-Oracle

  The FIFA World Cup tournament is the biggest single-sport competition: it’s watched by about 1 billion people around the world. Every four years each national team’s manager is challenged to pull together a group players who ply their trade across the globe. For example, of the 23 members of Brazil’s national team, only four actually play for Brazilian teams, and the rest play in England, France, Germany, Spain, Italy and Ukraine. Each country’s national league, each team and each coach has a unique style. Getting all these “localized” players to work together successfully as one unit is no easy feat. In addition to $35 million in prize money, much is at stake – not least national pride and global bragging rights until the next World Cup in four years time. Achieving economic integration in the ASEAN region by 2015 is a bit like trying to create the next World Cup champion by 2018. The team comprises Brunei Darussalam, Cambodia, Indonesia, Lao PDR, Malaysia, Myanmar, Philippines, Singapore, Thailand and Vietnam. All have different languages, currencies, cultures and customs, rules and regulations. But if they can pull together as one unit, the opportunity is not only great for business and the economy, but it’s also a source of regional pride. BCG expects by 2020 the number of firms headquartered in Asia with revenue exceeding $1 billion will double to more than 5,000. Their trade in the region and with the world is forecast to increase to 37% of an estimated $37 trillion of global commerce by 2020 from 30% in 2010. Banks offering transactional banking services to the emerging market place need to prepare to repond to customer needs across the spectrum – MSMEs, SMEs, corporates and multi national corporations. Customers want innovative, differentiated, value added products and services that provide: • Pan regional operational independence while enabling single source of truth at a regional level • Regional connectivity and Cash & Liquidity  optimization • Enabling Consistent experience for their customers  by offering standardized products & services across all ASEAN countries • Multi-channel & self service capabilities / access to real-time information on liquidity and cash flows • Convergence of cash management with supply chain and trade finance While enabling the above to meet customer demands, the need for a comprehensive and robust credit management solution for effective regional banking operations is a must to manage risk. According to BCG, Asia-Pacific wholesale transaction-banking revenues are expected to triple to $139 billion by 2022 from $46 billion in 2012. To take advantage of the trend, banks will have to manage and maximize their own growth opportunities, compete on a broader scale, manage the complexity within the region and increase efficiency. They’ll also have to choose the right operating model and regional IT platform to offer: • Account Services • Cash & Liquidity Management • Trade Services & Supply Chain Financing • Payments • Securities services • Credit and Lending • Treasury services The core platform should be able to balance global needs and local nuances. Certain functions need to be performed at a regional level, while others need to be performed on a country level. Financial reporting and regulatory compliance are a case in point. The ASEAN Economic Community is in the final lap of its preparations for the ultimate challenge: becoming a formidable team in the global league. Meanwhile, transaction banks are designing their own hat trick: implementing a world-class IT platform, positioning themselves to repond to customer needs and establishing a foundation for revenue generation for years to come. Anand Ramachandran Senior Director, Global Banking Solutions Practice Oracle Financial Services Global Business Unit

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• Should I expose IObservable<T> on my interfaces?

  - by Alex

  My colleague and I have dispute. We are writing a .NET application that processes massive amounts of data. It receives data elements, groups subsets of them into blocks according to some criterion and processes those blocks. Let's say we have data items of type Foo arriving some source (from the network, for example) one by one. We wish to gather subsets of related objects of type Foo, construct an object of type Bar from each such subset and process objects of type Bar. One of us suggested the following design. Its main theme is exposing IObservable objects directly from the interfaces of our components. // ********* Interfaces ********** interface IFooSource { // this is the event-stream of objects of type Foo IObservable<Foo> FooArrivals { get; } } interface IBarSource { // this is the event-stream of objects of type Bar IObservable<Bar> BarArrivals { get; } } / ********* Implementations ********* class FooSource : IFooSource { // Here we put logic that receives Foo objects from the network and publishes them to the FooArrivals event stream. } class FooSubsetsToBarConverter : IBarSource { IFooSource fooSource; IObservable<Bar> BarArrivals { get { // Do some fancy Rx operators on fooSource.FooArrivals, like Buffer, Window, Join and others and return IObservable<Bar> } } } // this class will subscribe to the bar source and do processing class BarsProcessor { BarsProcessor(IBarSource barSource); void Subscribe(); } // ******************* Main ************************ class Program { public static void Main(string[] args) { var fooSource = FooSourceFactory.Create(); var barsProcessor = BarsProcessorFactory.Create(fooSource) // this will create FooSubsetToBarConverter and BarsProcessor barsProcessor.Subscribe(); fooSource.Run(); // this enters a loop of listening for Foo objects from the network and notifying about their arrival. } } The other suggested another design that its main theme is using our own publisher/subscriber interfaces and using Rx inside the implementations only when needed. //********** interfaces ********* interface IPublisher<T> { void Subscribe(ISubscriber<T> subscriber); } interface ISubscriber<T> { Action<T> Callback { get; } } //********** implementations ********* class FooSource : IPublisher<Foo> { public void Subscribe(ISubscriber<Foo> subscriber) { /* ... */ } // here we put logic that receives Foo objects from some source (the network?) publishes them to the registered subscribers } class FooSubsetsToBarConverter : ISubscriber<Foo>, IPublisher<Bar> { void Callback(Foo foo) { // here we put logic that aggregates Foo objects and publishes Bars when we have received a subset of Foos that match our criteria // maybe we use Rx here internally. } public void Subscribe(ISubscriber<Bar> subscriber) { /* ... */ } } class BarsProcessor : ISubscriber<Bar> { void Callback(Bar bar) { // here we put code that processes Bar objects } } //********** program ********* class Program { public static void Main(string[] args) { var fooSource = fooSourceFactory.Create(); var barsProcessor = barsProcessorFactory.Create(fooSource) // this will create BarsProcessor and perform all the necessary subscriptions fooSource.Run(); // this enters a loop of listening for Foo objects from the network and notifying about their arrival. } } Which one do you think is better? Exposing IObservable and making our components create new event streams from Rx operators, or defining our own publisher/subscriber interfaces and using Rx internally if needed? Here are some things to consider about the designs: In the first design the consumer of our interfaces has the whole power of Rx at his/her fingertips and can perform any Rx operators. One of us claims this is an advantage and the other claims that this is a drawback. The second design allows us to use any publisher/subscriber architecture under the hood. The first design ties us to Rx. If we wish to use the power of Rx, it requires more work in the second design because we need to translate the custom publisher/subscriber implementation to Rx and back. It requires writing glue code for every class that wishes to do some event processing.

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• java.lang.IllegalAccessException during Ant jwsc webservice build

  - by KevB

  Hi. I have a large application, part of which relies on a set of 3 webservices. I'm currently in the process of writing an Ant build script to build and package the application into an EAR file. When building the web sub-project for this application I use the <jwsc> task in Ant to compile the webservices. This causes an IllegalAccessException, as outlined in the stack trace below: [jwsc] warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds [jwsc] JWS: processing module weboutput [jwsc] Parsing source files [jwsc] Parsing source files [jwsc] 3 JWS files being processed for module weboutput [jwsc] JWS: C:\dev\ir\irWeb\src\webservices\DailyRun.java Validated. [jwsc] JWS: C:\dev\ir\irWeb\src\webservices\PendingRegistrationsSweep.java Validated. [jwsc] JWS: C:\dev\ir\irWeb\src\webservices\RegistrationsGoLive.java Validated. [jwsc] Compiling 6 source files to C:\DOCUME~1\KEVIN~1.BRE\LOCALS~1\Temp\_5l950r [jwsc] An exception has occurred in the compiler (1.6.0_23). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you. [jwsc] java.lang.IllegalAccessError: tried to access class com.sun.tools.javac.jvm.ClassReader$AnnotationDefaultCompleter from class com.sun.tools.javac.jvm.ClassReader [jwsc] at com.sun.tools.javac.jvm.ClassReader.attachAnnotationDefault(ClassReader.java:1128) [jwsc] at com.sun.tools.javac.jvm.ClassReader.readMemberAttr(ClassReader.java:906) [jwsc] at com.sun.tools.javac.jvm.ClassReader.readMemberAttrs(ClassReader.java:1027) [jwsc] at com.sun.tools.javac.jvm.ClassReader.readMethod(ClassReader.java:1490) [jwsc] at com.sun.tools.javac.jvm.ClassReader.readClass(ClassReader.java:1586) [jwsc] at com.sun.tools.javac.jvm.ClassReader.readClassFile(ClassReader.java:1658) [jwsc] at com.sun.tools.javac.jvm.ClassReader.fillIn(ClassReader.java:1845) [jwsc] at com.sun.tools.javac.jvm.ClassReader.complete(ClassReader.java:1777) [jwsc] at com.sun.tools.javac.code.Symbol.complete(Symbol.java:386) [jwsc] at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:763) [jwsc] at com.sun.tools.javac.jvm.ClassReader.loadClass(ClassReader.java:1951) [jwsc] at com.sun.tools.javac.comp.Resolve.loadClass(Resolve.java:842) [jwsc] at com.sun.tools.javac.comp.Resolve.findIdentInPackage(Resolve.java:1011) [jwsc] at com.sun.tools.javac.comp.Attr.selectSym(Attr.java:1921) [jwsc] at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:1835) [jwsc] at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1522) [jwsc] at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:360) [jwsc] at com.sun.tools.javac.comp.Attr.attribType(Attr.java:390) [jwsc] at com.sun.tools.javac.comp.MemberEnter.attribImportType(MemberEnter.java:681) [jwsc] at com.sun.tools.javac.comp.MemberEnter.visitImport(MemberEnter.java:545) [jwsc] at com.sun.tools.javac.tree.JCTree$JCImport.accept(JCTree.java:495) [jwsc] at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:387) [jwsc] at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:399) [jwsc] at com.sun.tools.javac.comp.MemberEnter.visitTopLevel(MemberEnter.java:512) [jwsc] at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:446) [jwsc] at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:387) [jwsc] at com.sun.tools.javac.comp.MemberEnter.complete(MemberEnter.java:819) [jwsc] at com.sun.tools.javac.code.Symbol.complete(Symbol.java:386) [jwsc] at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:763) [jwsc] at com.sun.tools.javac.comp.Enter.complete(Enter.java:464) [jwsc] at com.sun.tools.javac.comp.Enter.main(Enter.java:442) [jwsc] at com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:819) [jwsc] at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:727) [jwsc] at com.sun.tools.javac.main.Main.compile(Main.java:353) [jwsc] at com.sun.tools.javac.main.Main.compile(Main.java:279) [jwsc] at com.sun.tools.javac.main.Main.compile(Main.java:270) [jwsc] at com.sun.tools.javac.Main.compile(Main.java:69) [jwsc] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [jwsc] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:56) [jwsc] at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1097) [jwsc] at weblogic.wsee.tools.anttasks.DelegatingJavacTask$ExposingJavac.compile(DelegatingJavacTask.java:343) [jwsc] at weblogic.wsee.tools.anttasks.DelegatingJavacTask.compile(DelegatingJavacTask.java:286) [jwsc] at weblogic.wsee.tools.anttasks.JwscTask.javac(JwscTask.java:335) [jwsc] at weblogic.wsee.tools.anttasks.JwsModule.compile(JwsModule.java:390) [jwsc] at weblogic.wsee.tools.anttasks.JwsModule.build(JwsModule.java:262) [jwsc] at weblogic.wsee.tools.anttasks.JwscTask.execute(JwscTask.java:227) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.Target.execute(Target.java:390) [jwsc] at org.apache.tools.ant.Target.performTasks(Target.java:411) [jwsc] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397) [jwsc] at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38) [jwsc] at org.apache.tools.ant.Project.executeTargets(Project.java:1249) [jwsc] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442) [jwsc] at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.Target.execute(Target.java:390) [jwsc] at org.apache.tools.ant.Target.performTasks(Target.java:411) [jwsc] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397) [jwsc] at org.apache.tools.ant.Project.executeTarget(Project.java:1366) [jwsc] at com.bea.workshop.cmdline.antlib.AntExTask.execute(AntExTask.java:406) [jwsc] at com.bea.workshop.cmdline.antlib.AntCallExTask.execute(AntCallExTask.java:118) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.Target.execute(Target.java:390) [jwsc] at org.apache.tools.ant.Target.performTasks(Target.java:411) [jwsc] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397) [jwsc] at org.apache.tools.ant.Project.executeTarget(Project.java:1366) [jwsc] at com.bea.workshop.cmdline.antlib.AntExTask.execute(AntExTask.java:406) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) [jwsc] at net.sf.antcontrib.logic.IfTask.execute(IfTask.java:217) [jwsc] at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:154) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) [jwsc] at net.sf.antcontrib.logic.IfTask.execute(IfTask.java:197) [jwsc] at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:154) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:398) [jwsc] at net.sf.antcontrib.logic.ForTask.doSequentialIteration(ForTask.java:259) [jwsc] at net.sf.antcontrib.logic.ForTask.doToken(ForTask.java:268) [jwsc] at net.sf.antcontrib.logic.ForTask.doTheTasks(ForTask.java:299) [jwsc] at net.sf.antcontrib.logic.ForTask.execute(ForTask.java:244) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:398) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.Target.execute(Target.java:390) [jwsc] at org.apache.tools.ant.Target.performTasks(Target.java:411) [jwsc] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397) [jwsc] at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38) [jwsc] at org.apache.tools.ant.Project.executeTargets(Project.java:1249) [jwsc] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442) [jwsc] at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105) [jwsc] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [jwsc] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [jwsc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [jwsc] at java.lang.reflect.Method.invoke(Method.java:597) [jwsc] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [jwsc] at org.apache.tools.ant.Task.perform(Task.java:348) [jwsc] at org.apache.tools.ant.Target.execute(Target.java:390) [jwsc] at org.apache.tools.ant.Target.performTasks(Target.java:411) [jwsc] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397) [jwsc] at org.apache.tools.ant.Project.executeTarget(Project.java:1366) [jwsc] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) [jwsc] at org.apache.tools.ant.Project.executeTargets(Project.java:1249) [jwsc] at org.apache.tools.ant.Main.runBuild(Main.java:801) [jwsc] at org.apache.tools.ant.Main.startAnt(Main.java:218) [jwsc] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280) [jwsc] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109) [AntUtil.deleteDir] Deleting directory C:\DOCUME~1\KEVIN~1.BRE\LOCALS~1\Temp_5l950r The Ant target that uses the <jwsc> task is this: <target name="webservice.build" depends="init,generated.root.init"> <path id="jwsc.srcpath"> <path path="${java.sourcepath}" /> <pathelement path="build/assembly/.src" /> </path> <taskdef name="jwsc" classname="weblogic.wsee.tools.anttasks.JwscTask" > <classpath> <path refid="weblogic.jar.classpath" /> </classpath> </taskdef> <property name="jwsc.module.root" value="${project.dir}/build/weboutput"/> <property name="jwsc.contextpath" value="irWeb"/> <property name="jwsc.srcpath.prop" refid="jwsc.srcpath"/> <path id="jwsc.classpath"> <path refid="weblogic.jar.classpath" /> <path refid="java.classpath" /> <pathelement path="${java.outpath}" /> </path> <jwsc destdir="${project.dir}/build" classpathref="jwsc.classpath"> <module name="weboutput" explode="true" contextPath="${jwsc.contextpath}" > <jwsFileSet srcdir="${webservices.dir}" type="JAXRPC"> <include name="**/*.java"/> </jwsFileSet> <descriptor file="${jwsc.module.root}/WEB-INF/web.xml" /> <descriptor file="${jwsc.module.root}/WEB-INF/weblogic.xml" /> </module> </jwsc> </target> I have no idea what could be causing the compiler to throw this error at build time, and a day of google searching has turned up other instances of this error caused by different triggers, and solutions for those propblems didn't work for me. I also found a single report on the Oracle forums that seemed to be a carbon copy of this issue, but there were no replies. The application is written in Weblogic Workshop 10, runs on Weblogic Server 10.3, and uses Beehive / NetUI. Not sure if that would make a difference or not though. The build scripts were automatically generated by Weblogic Workshop, with some tweaks and fixes made to other aspects of the files by myself to fix other compatability issues. I am using Java 1.6.0_23 from Sun, and Ant 1.8.1 Any help or advice would be greatly appreciated.

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• Is HttpContextWrapper all that....useful?

  - by bakasan

  I've been going through the process of cleaning up our controller code to make each action as testable. Generally speaking, this hasn't been too difficult--where we have opportunity to use a fixed object, like say FormsAuthentication, we generally introduce some form of wrapper as appropriate and be on our merry way. For reasons not particularly germaine to this conversation, when it came to dealing with usage of HttpContext, we decided to use the newly created HttpContextWrapper class rather than inventing something homegrown. One thing we did introduce was the ability to swap in a HttpContextWrapper (like say, for unit testing). This was wholly inspired by the way Oren Eini handles unit testing with DateTimes (see article, a pattern we also use) public static class FooHttpContext { public static Func<HttpContextWrapper> Current = () => new HttpContextWrapper(HttpContext.Current); public static void Reset() { Current = () => new HttpContextWrapper(HttpContext.Current); } } Nothing particularly fancy. And it works just fine in our controller code. The kicker came when we go to write unit tests. We're using Moq as our mocking framework, but alas var context = new Mock<HttpContextWrapper>() breaks since HttpContextWrapper doesn't have a parameterless ctor. And what does it take as a ctor parameter? A HttpContext object. So I find myself in a catch 22. I'm using the prescribed way to decouple HttpContext--but I can't mock a value in because the original HttpContext object was sealed and therefore difficult to test. I can map HttpContextBase, which both derive from--but that doesn't really get me what I'm after. Am I just missing the point somewhere with regard to HttpContextWrapper? I can find ways to work around the issue, but we are kind of fond of remaining consistent in decoupling using the Function delegate pattern--but it seems like we're not fully grokking intent of the wrapper.

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• Authlogic and functional tests - Authlogic::Session::Activation::NotActivatedError: You must activat

  - by adam

  Im getting the errors below despite following the documentation. In test_helper.rb ENV["RAILS_ENV"] = "test" require File.expand_path(File.dirname(__FILE__) + "/../config/environment") require "authlogic/test_case" require 'test_help' require 'shoulda' require File.dirname(__FILE__) + "/factories" In my functional test require 'test_helper' class SentencesControllerTest < ActionController::TestCase setup do :activate_authlogic end context "logged in" do setup do @user = Factory(:user) UserSession.create(@user.id) end context "on GET to :new" do setup do get :new end should "present form with text field" do assert_select('form#new_sentence') do assert_select('textarea#sentence_text') end end end end #context logged in. end in environments.rb config.gem "authlogic" Im not sure why it isnt working. Can anyone help out on this? Authlogic::Session::Activation::NotActivatedError: You must activate the Authlogic::Session::Base.controller with a controller object before creating objects authlogic (2.1.3) lib/authlogic/session/activation.rb:47:in `initialize' authlogic (2.1.3) lib/authlogic/session/klass.rb:64:in `initialize' authlogic (2.1.3) lib/authlogic/session/scopes.rb:79:in `initialize' authlogic (2.1.3) lib/authlogic/session/existence.rb:29:in `new' authlogic (2.1.3) lib/authlogic/session/existence.rb:29:in `create' test/functional/sentences_controller_test.rb:11:in `__bind_1270172858_922804' shoulda (2.10.3) lib/shoulda/context.rb:380:in `call' shoulda (2.10.3) lib/shoulda/context.rb:380:in `run_current_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:379:in `each' shoulda (2.10.3) lib/shoulda/context.rb:379:in `run_current_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:371:in `run_all_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:375:in `run_parent_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:359:in `test: logged in on GET to :new should present form with text field. ' /opt/rubymine/rb/testing/patch/testunit/test/unit/ui/testrunnermediator.rb:36:in `run_suite' /opt/rubymine/rb/testing/patch/testunit/test/unit/ui/teamcity/testrunner.rb:215:in `start_mediator' /opt/rubymine/rb/testing/patch/testunit/test/unit/ui/teamcity/testrunner.rb:191:in `start'

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• Highlighting dates between two selected dates jQuery UI Datepicker

  - by Ralph

  I have one datepicker with numberOfMonths set to 2. Arrival Date and Departure Date are determined using this logic (within onSelect): if ((count % 2)==0) { depart = $("#datepicker-1").datepicker('getDate'); if (arriv depart) { temp=arriv; arriv=depart; depart=temp; } $("#check-in").val($.datepicker.formatDate("DD, MM d, yy",arriv)); $("#check-out").val($.datepicker.formatDate("DD, MM d, yy",depart)); } else { arriv = $("#datepicker-1").datepicker('getDate'); depart = null; if ((arriv depart)&&(depart!=null)) { temp=arriv; arriv=depart; depart=temp; } $("#day-count").val(''); $("#check-in").val($.datepicker.formatDate("DD, MM d, yy",arriv)); $("#check-out").val($.datepicker.formatDate("DD, MM d, yy",depart)); } if(depart!=null) { diffDays = Math.abs((arriv.getTime() - depart.getTime())/(oneDay)); if (diffDays == 0) { $("#day-count").val((diffDays+1)+' Night/s'); } else { $("#day-count").val(diffDays+' Night/s'); } } Getting the number of days within these 2 dates has no problem What I want now is highlight those dates starting from the Arrival to Departure I tried working around the onSelect but had no luck. I am now using beforeShowDay to highlight these dates but I can't seem to figure it out Got a sample from here Basically, it is customized to highlight 11 or 12 days after the selected date (Here's the code from that link). $('#datePicker').datepicker({beforeShowDay: function(date) { if (selected != null && date.getTime() selected.getTime() && (date.getTime() - selected.getTime()) Since I am new to using the UI, and the logic is not clear to me yet, I can't seem to figure this out. Any ideas on how I can make this highlight dates between the Arrival and Departure using my aforementioned logic used in determining the two?

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• MSTest project can't get localized string?

  - by miliu

  I ran into a strange problem. In my unit test, I want to check the localized strings. However, I can't seem to get it work. For example, I created two resources: Resource1.resx for English and Resource1.zh-CN.resx for Chinese. The unit test project can only get the (default?) English resource string. This is the code I'm using: ResourceManager actual = new ResourceManager(typeof(LocaleTest.Properties.Resource1)); string name0 = actual.GetString("Name", new CultureInfo("en-US")); string name1 = actual.GetString("Name", new CultureInfo("zh-CN")); I created another regular project (means not a MSTest project) to make sure the localized strings are working. So, it works in a regular project, but not in a MSTest project. It didn't help even if I put the following code to make 'zh-CN' as the current culture of the unit test: [TestInitialize()] public void MyTestInitialize() { Thread.CurrentThread.CurrentCulture = new CultureInfo("zh-CN"); Thread.CurrentThread.CurrentUICulture = new CultureInfo("zh-CN"); } Anybody has seen similar problems? Is there any workaround?

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• Is there any better IDOMImplementation other than MSXML?

  - by Chau Chee Yang

  There are 3 IDOMImplementation available in Delphi: MSXML Xerces XML ADOM XML v4 MSXML is the default IDOMImplementation. My test is count the time need to load a 10MB xml file. I use a Delphi unit generated from a XSD using XML data binding to load the xml file. This unit has 3 common function: function Getmenubar(Doc: IXMLDocument): IXMLMenubarType; function Loadmenubar(const FileName: WideString): IXMLMenubarType; function Newmenubar: IXMLMenubarType; I learn from the web that some comment that MSXML's overhead is high that it doesn't perform if compare to other XML parser. However, my study shows that MSXML is the best among others. Xerces XML 2nd and ADOM XML v4 the worst: MSXML - 0.6410 seconds Xerces XML - 2.4220 seconds ADOM XML v4 - 67.50 seconds I also come across with OmniXML that claim to have much better performance compare to MSXML but I never success using it with the unit generated by XML data binding. Is there any other vendor that implement IDOMImplementation of Delphi that work much better than MSXML? I am using Delphi 2010 and Windows 7.

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• What makes static initialization functions good, bad, or otherwise?

  - by Richard Levasseur

  Suppose you had code like this: _READERS = None _WRITERS = None def Init(num_readers, reader_params, num_writers, writer_params, ...args...): ...logic... _READERS = new ReaderPool(num_readers, reader_params) _WRITERS = new WriterPool(num_writers, writer_params) ...more logic... class Doer: def __init__(...args...): ... def Read(self, ...args...): c = _READERS.get() try: ...work with conn finally: _READERS.put(c) def Writer(...): ...similar to Read()... To me, this is a bad pattern to follow, some cons: Doers can be created without its preconditions being satisfied The code isn't easily testable because ConnPool can't be directly mocked out. Init has to be called right the first time. If its changed so it can be called multiple times, extra logic has to be added to check if variables are already defined, and lots of NULL values have to be passed around to skip re-initializing. In the event of threads, the above becomes more complicated by adding locking Globals aren't being used to communicate state (which isn't strictly bad, but a code smell) On the other hand, some pros: its very convenient to call Init(5, "user/pass", 2, "user/pass") It simple and "clean" Personally, I think the cons outweigh the pros, that is, testability and assured preconditions outweigh simplicity and convenience.

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• Transition from 2D to 3D later in game development

  - by Axarydax

  Hi, I'd like to work on a game, but for rapidly prototyping it, I'd like to keep it as simple as possible, so I'd do everything in top-down 2D in GDI+ and WinForms (hey, I like them!), so I can concentrate on the logic and architecture of the game itself. I thinking about having the whole game logic (server) in one assembly, where the WinForms app would be a client to that game, and if/when the time is right, I'd write a 3D client. I am tempted to use XNA, but I haven't really looked into it, so I don't know if it won't take too much time getting up to speed - I really don't want to spent much time doing other stuff than the game logic, at least while I have the inspiration. But I wouldn't have to abandon everything and transfer to new platform when transitioning from 2D to 3D. Another idea is just to get over it and learn XNA/Unity/SDL/something at least to that level so I can make the same 2D version as I could in GDI+, and I won't have to worry about switching frameworks anymore. Let's just say that the game is the kind where you watch a dude from behind, you run around the gameworld and interact with objects. So the bird's eye perspective could be doable for now. Thanks.

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• testing devise with shoulda and machinist

  - by mattherick

  hello! I´d like to test my app with shoulda and machinist. I use the devise authentification gem. I get following error: $ ruby unit/page_test.rb c:/Ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be rem oved on or after August 2010. Use #requirement c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in load_missing_constant': uninitialized constant Admins (N ameError) from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:inconst_missing' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in const_missing' from c:/Users/Mattherick/Desktop/heimspiel/heimspiel_app/app/controllers/admins_controller.rb:1 from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require' from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in require' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:158:inrequire' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:265:in require_or_load' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:224:independ_on' ... 12 levels... from ./unit/../test_helper.rb:2 from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire' from unit/page_test.rb:1 Somebody an idea what´s wrong? If I don´t use devise my tests are okay. And my second question: Does somebdoy has a good tutorial for increasing different roles in the devise gem? If I generate my own views and add a few attributes to my devise-model, they won´t be save in the database. I read the docu at github, but don´t really checked it. mattherick

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• Boost.Python wrapping hierarchies avoiding diamond inheritance

  - by stbuton

  I'm having some trouble seeing what the best way to wrap a series of classes with Boost.Python while avoiding messy inheritance problems. Say I have the classes A, B, and C with the following structure: struct A { virtual void foo(); virtual void bar(); virtual void baz(); }; struct B : public A { virtual void quux(); }; struct C : public A { virtual void foobar(); }; I want to wrap all classes A, B, and C such that they are extendable from Python. The normal method for accomplishing this would be along the lines of: struct A_Wrapper : public A, boost::python::wrapper<A> { //dispatch logic for virtual functions }; Now for classes B and C which extend from A I would like to be able to inherit and share the wrapping implementation for A. So I'd like to be able to do something along the lines of: struct B_Wrapper : public B, public A_Wrapper, public boost::python::wrapper<B> { //dispatch logic specific for B }; struct C_Wrapper : public C, public A_Wrapper, public boost::python::wrapper<C> { //dispatch logic specific for C } However, it seems like that would introduce all manner of nastiness with the double inheritance of the boost wrapper base and the double inheritance of A in the B_Wrapper and C_Wrapper objects. Is there a common way that this instance is solved that I'm missing? thanks.

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• JVM/CLR Source-compatible Language Options

  - by Nathan Voxland

  I have an open source Java database migration tool (http://www.liquibase.org) which I am considering porting to .Net. The majority of the tool (at least from a complexity side) is around logic like "if you are adding a primary key and the database is Oracle use this SQL. If database is MySQL use this SQL. If the primary key is named and the database is Postgres use this SQL". I could fork the Java codebase and covert it (manually and/or automatically), but as updates and bug fixes to the above logic come in I do not want to have to apply it to both versions. What I would like to do is move all that logic into a form that can be compiled and used by both Java and .Net versions naively. The code I am looking to convert does not contain any advanced library usage (JDBC, System.out, etc) that would vary significantly from Java to .Net, so I don't think that will be an issue (at worst it can be designed around). So what I am looking for is: A language in which I can code common parts of my app in and compile it into classes usable by the "standard" languages on the target platform Does not add any runtime requirements to the system Nothing so strange that it scares away potential contributors I know Python and Ruby both have implementations on for the JVM and CLR. How well do they fit my requirements? Has anyone been successful (or unsuccesful) using this technique for cross-platform applications? Are there any gotcha's I need to worry about?

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• parsing css measures

  - by david

  When i write a jQuery plugin i like to specify options for spacings the CSS way. I wrote a function that returns a CSS String as values in a object. 5px 10px returns top: 5px, right: 10px, bottom: 5px, left: 10px Now i often use the returned values to do some calculations and its not very nice to have to extract the measuring unit every time... I suck in writing regular expressions could someone help me complete this function: this.cssMeasure = function(cssString, separateUnits){ if ( cssString ){ var values = {} }else{ return errorMsg } var spacing = cssString.split(' ') var errorMsg = 'please format your css values correctly dude' if( spacing[4] || (spacing[2] && !spacing[3]) ) { return errorMsg } else if ( spacing[3] ) { values = {top: spacing[0], right:spacing[1], bottom:spacing[2], left:spacing[3]} } else if ( spacing[1] ) { values = {top: spacing[0], right:spacing[1], bottom:spacing[0], left:spacing[1]} } else { values = {top: spacing[0], right:spacing[0], bottom:spacing[0], left:spacing[0]} } if (separateUnits) { $.each(values, function(i, value){ /* at this place i need to extract the measuring unit of each value and return them separately something like top: {value: 10, unit: 'px'}, right: {bla} and so on */ }) } return values } if you have any idea how to improve this function i am open to your comments.

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• Error while running RSpec test cases.

  - by alokswain

  Following is the error i receive while running test cases written using rpsec. The strange thing is the test were running fine until early yesterday. Can someone guide me towards a solution. I am new to RSpec and and using Rspec and rspec-rails as plugins in my app. and i have no clue to what went wrong. F:/Spritle/programs/ruby 1.86/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_suppor t/dependencies.rb:105:in `const_missing': uninitialized constant Test::Unit::TestResult::TestResultFailureSupport (NameError) from F:/Spritle/programs/ruby 1.86/lib/ruby/gems/1.8/gems/test-unit-2.0.1/lib/test/unit/testresult.rb:28 from F:/Spritle/programs/ruby 1.86/lib/ruby/site_ruby/1.8/rubygems/custom_require. rb:31:in `gem_original_require' from F:/Spritle/programs/ruby 1.86/lib/ruby/site_ruby/1.8/rubygems/custom_require. rb:31:in `require' from F:/Spritle/programs/ruby 1.86/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/ active_support/dependencies.rb:158:in `require' from F:/Spritle/projects/Evaluation/vendor/plugins/rspec/lib/spec/interop/test.rb: 34 from F:/Spritle/programs/ruby 1.86/lib/ruby/site_ruby/1.8/rubygems/custom_require. rb:31:in `gem_original_require' from F:/Spritle/programs/ruby 1.86/lib/ruby/site_ruby/1.8/rubygems/custom_require. rb:31:in `require' from F:/Spritle/programs/ruby 1.86/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/ active_support/dependencies.rb:158:in `require' ... 15 levels... from F:/Spritle/projects/Evaluation/vendor/plugins/rspec/lib/spec/runner/example_g roup_runner.rb:14:in `load_files' from F:/Spritle/projects/Evaluation/vendor/plugins/rspec/lib/spec/runner/options.r b:133:in `run_examples' from F:/Spritle/projects/Evaluation/vendor/plugins/rspec/lib/spec/runner/command_l ine.rb:9:in `run' from F:/Spritle/projects/Evaluation/vendor/plugins/rspec/bin/spec:5 rake aborted! Command "F:/Spritle/programs/ruby 1.86/bin/ruby.exe" -I"lib" "F:/Spritle/projects/Evaluation/vendor/plugins/rspec/bin/spec" "spec/controllers/articles_controller_spec.rb" --option s "F:/Spritle/projects/Evaluation/spec/spec.opts" failed

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• How to refactor use of the general Exception?

  - by Colin

  Our code catches the general exception everywhere. Usually it writes the error to a log table in the database and shows a MessageBox to the user to say that the operation requested failed. If there is database interaction, the transaction is rolled back. I have introduced a business logic layer and a data access layer to unravel some of the logic. In the data access layer, I have chosen not to catch anything and I also throw ArgumentNullExceptions and ArgumentOutOfRangeExceptions so that the message passed up the stack does not come straight from the database. In the business logic layer I put a try catch. In the catch I rollback the transaction, do the logging and rethrow. In the presentation layer there is another try catch that displays a MessageBox. I am now thinking about catching a DataException and an ArgumentException instead of an Exception where I know the code only accesses a database. Where the code accesses a web service, then I thought I would create my own "WebServiceException", which would be created in the data access layer whenever an HttpException, WebException or SoapException is thrown. So now, generally I will be catching 2 or 3 exceptions where currently I catch just the general Exception, and I think that seems OK to me. Does anyone wrap exceptions up again to carry the message up to the presentation layer? I think I should probably add a try catch to Main() that catches Exception, attempts to log it, displays an "Application has encountered an error" message and exits the application. So, my question is, does anyone see any holes in my plan? Are there any obvious exceptions that I should be catching or do these ones pretty much cover it (other than file access - I think there is only 1 place where we read-write to a config file).

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• NMock2.0 - how to stub a non interface call?

  - by dferraro

  Hello, I have a class API which has full code coverage and uses DI to mock out all the logic in the main class function (Job.Run) which does all the work. I found a bug in production where we werent doing some validation on one of the data input fields. So, I added a stub function called ValidateFoo()... Wrote a unit test against this function to Expect a JobFailedException, ran the test - it failed obviously because that function was empty. I added the validation logic, and now the test passes. Great, now we know the validation works. Problem is - how do I write the test to make sure that ValidateFoo() is actually called inside Job.Run()? ValidateFoo() is a private method of the Job class - so it's not an interface... Is there anyway to do this with NMock2.0? I know TypeMock supports fakes of non interface types. But changing mock libs right now is not an option. At this point if NMock can't support it, I will simply just add the ValidateFoo() call to the Run() method and test things manually - which obviously I'd prefer not to do considering my Job.Run() method has 100% coverage right now. Any Advice? Thanks very much it is appreciated. EDIT: the other option I have in mind is to just create an integration test for my Job.Run functionality (injecting to it true implementations of the composite objects instead of mocks). I will give it a bad input value for that field and then validate that the job failed. This works and covers my test - but it's not really a unit test but instead an integration test that tests one unit of functionality.... hmm.. EDIT2: IS there any way to do tihs? Anyone have ideas? Maybe TypeMock - or a better design?

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• Why use SQL database?

  - by martinthenext

  I'm not quite sure stackoverflow is a place for such a general question, but let's give it a try. Being exposed to the need of storing application data somewhere, I've always used MySQL or sqlite, just because it's always done like that. As it seems like the whole world is using these databases, most of all software products, frameworks, etc. It is rather hard for a beginning developer like me to ask a question - why? Ok, say we have some object-oriented logic in our application, and objects are related to each other somehow. We need to map this logic to the storage logic, so we need relations between database objects too. This leads us to using relational database and I'm ok with that - to put it simple, our database rows sometimes will need to have references to other tables' rows. But why do use SQL language for interaction with such a database? SQL query is a text message. I can understand this is cool for actually understanding what it does, but isn't it silly to use text table and column names for a part of application that no one ever seen after deploynment? If you had to write a data storage from scratch, you would have never used this kind of solution. Personally, I would have used some 'compiled db query' bytecode, that would be assembled once inside a client application and passed to the database. And it surely would name tables and colons by id numbers, not ascii-strings. In the case of changes in table structure those byte queries could be recompiled according to new db schema, stored in XML or something like that. What are the problems of my idea? Is there any reason for me not to write it myself and to use SQL database instead?

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• Java - Custom PropertyEditorSupport to display units

  - by I82Much

  All, I'm trying to make the properties of my node have Units associated with the measure. ( I am using the JScience.org implementation of JSR 275) So for instance, public class Robot extends AbstractNode { // in kg float vehicleMass; @Override public Sheet createSheet() { Sheet s = Sheet.createDefault(); Sheet.Set set = s.createPropertiesSet(); try { PropertySupport.Reflection vehicleMassField = new PropertySupport.Reflection(this, float.class, "vehicleMass"); vehicleMassField.setValue("units", SI.KILOGRAMS); vehicleMassField.setName("vehicleMass"); set.put(vehicleMassField); PropertyEditorManager.registerEditor(float.class, UnitInPlaceEditor.class); } catch (NoSuchMethodException ex) { Exceptions.printStackTrace(ex); } s.put(set); return s; } } I want my UnitInPlaceEditor to append the units to the end of the string representation of the number, and when the field is clicked (enters edit mode) for the units to disappear and just the number becomes selected for editing. I can make the units appear, but I cannot get the units to disappear when the field enters editing mode. public class UnitsInplaceEditor extends PropertyEditorSupport implements ExPropertyEditor { private PropertyEnv pe; @Override public String getAsText() { // Append the unit by retrieving the stored value } @Override public void setAsText(String s) { // strip off the unit, parse out the number } public void attachEnv(PropertyEnv pe) { this.pe = pe; } } Here's a screenshot of the display - I like it like this.. but here's the value being edited; note the unit stays there. Basically I want one value (string) to be displayed in the field when the field is NOT being edited, and a different to be displayed when user starts editing the field. Barring that, I'd like to put a constant jlabel for the units (uneditable) to the right of the text field. Anyone know how to do this?

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• What kinds of problems are most likely to occur? (question rewritten)

  - by ChrisC

  If I wrote 1) a C# SQL db app (a simple program consisting of a gui over some forms with logic for interfacing with the sql db) 2) for home use, that doesn't do any network communication 3) that uses a simple, reliable, and appropriate sql db 4) whose gui is properly separated from the logic 5) that has complete and dependable input data validation 6) that has been completely tested so that 100% of logic bugs were eliminated ... and then if the program was installed and run by random users on their random Windows computers Q1) What types of technical (non-procedural) problems and support situations are most likely to occur, and how likely are they? Q2) Are there more/other things I could do in the first place to prevent those problems and also minimize the amount of user support required? I know some answers will apply to my specific platforms (C#, SQL, Windows, etc) and some won't. Please be as specific as is possible. Mitch Wheat gave me some very valuable advice below, but I'm now offering the bounty because I am hoping to get a better picture of the kinds of things that I'm most reasonably likely to encounter. Thanks.

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• Ruby Doesn't Recognize Alias Method

  - by Jesse J

  I'm trying to debug someone else's code and having trouble figuring out what's wrong. When I run rake, one of the errors I get is: 2) Error: test_math(TestRubyUnits): NoMethodError: undefined method `unit_sin' for CMath:Module /home/user/ruby-units/lib/ruby_units/math.rb:21:in `sin' This is the function that calls the method: assert_equal Math.sin(pi), Math.sin("180 deg".unit) And this is what the class looks like: module Math alias unit_sin sin def sin(n) Unit === n ? unit_sin(n.to('radian').scalar) : unit_sin(n) end alias unit_cos cos def cos(n) Unit === n ? unit_cos(n.to('radian').scalar) : unit_cos(n) end ... module_function :unit_sin module_function :sin module_function :unit_cos module_function :cos ... end (The ellipsis means "more of the same"). As far as I can see, this is valid Ruby code. Is there something I'm missing here that's causing the error, or could the error be coming from something else? Update: I'm wondering if the problem has to do with namespaces. This code is attempting to extend CMath, so perhaps the alias and/or module_function isn't actually getting into CMath, or something like that....

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• Solving Naked Triples in Sudoku

  - by Kave

  Hello, I wished I paid more attention to the math classes back in Uni. :) How do I implement this math formula for naked triples? Naked Triples Take three cells C = {c1, c2, c3} that share a unit U. Take three numbers N = {n1, n2, n3}. If each cell in C has as its candidates ci ? N then we can remove all ni ? N from the other cells in U.** I have a method that takes a Unit (e.g. a Box, a row or a column) as parameter. The unit contains 9 cells, therefore I need to compare all combinations of 3 cells at a time that from the box, perhaps put them into a stack or collection for further calculation. Next step would be taking these 3-cell-combinations one by one and compare their candidates against 3 numbers. Again these 3 numbers can be any possible combination from 1 to 9. Thats all I need. But how would I do that? How many combinations would I get? Do I get 3 x 9 = 27 combinations for cells and then the same for numbers (N)? How would you solve this in classic C# loops? No Lambda expression please I am already confused enough :) Many Thanks for any help,

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