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  • Curiosity’s Descent to Mars in HD [Video]

    - by Jason Fitzpatrick
    Thanks to the Mars Descent Imager (MARDI) mounted on the fore-port side of Curiosity we’re treated to a high-resolution video of Curiosity’s descent to Mars. The video from MARDI, combined with the video editing of YouTube user DLFitch, yields the above video. He writes: This is a full-resolution version of the NASA Curiosity rover descent to Mars, taken by the MARDI descent imager. As of August 20, all but a dozen 1600×1200 frames have been uploaded from the rover, and those missing were interpolated using thumbnail data. The result was applied a heavy noise reduction, color balance, and sharpening for best visibility. The video plays at 15fps, or 3x realtime. The heat shield impacts in the lower left frame at 0:21, and is shown enlarged at the end of the video. Image source. Complete MSL Curiosity Descent – Full Quality Enhanced 1080p + Heat Shield impact [YouTube] HTG Explains: Is UPnP a Security Risk? How to Monitor and Control Your Children’s Computer Usage on Windows 8 What Happened to Solitaire and Minesweeper in Windows 8?

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  • Don’t learn SSDT, learn about your databases instead

    - by jamiet
    Last Thursday I presented my session “Introduction to SSDT” at the SQL Supper event held at the offices of 7 Digital (loved the samosas, guys). I did my usual spiel, tour of the IDE, connected development, declarative database development yadda yadda yadda… and at the end asked if there were any questions. One gentleman in attendance (sorry, can’t remember your name) raised his hand and stated that by attempting to evangelise all of the features I’d missed the single biggest benefit of SSDT, that it can tell you stuff about database that you didn’t already know. I realised that he was dead right. SSDT allows you to import your whole database schema into a new project and it will instantly give you a list of errors and/or warnings pertaining to the objects in your database. Invalid references (e.g a long-forgotten stored procedure that refers to a non-existent column), unnecessary 3-part naming, incorrect case usage, syntax errors…it’ll tell you about all of ‘em! Turn on static code analysis (this article shows you how) and you’ll learn even more such as any stored procedures that begin with “sp_”, WHERE clauses that will kill performance, use of @@IDENTITY instead of SCOPE_IDENTITY(), use of deprecated syntax, implicit casts etc…. the list goes on and on. I urge you to download and install SSDT (takes a few minutes, its free and you don’t need SQL Server or Visual Studio pre-installed), start a new project: right-click on your new project and import from your database: and see what happens: You may be surprised what you discover. Let me know in the comments below what results you get, total number of objects, number of errors/warnings, I’d be interested to know! @Jamiet

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  • Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox

    - by Asian Angel
    Do you need to make the most efficient use possible of vertical UI space on your system’s screen, but have horizontal space to spare? Now you can shift the toolbar icons and their awesome functionality to a slim sidebar in Firefox using the Vertical Toolbar extension. As you can see above the sidebar even picked up on our Personas Theme to help it blend in nicely with the rest of the browser. You can access the options for the new toolbar by right clicking within the toolbar area. These are the options for the toolbar…you can choose the side of Firefox that works best for toolbar placement, adjust display, hiding, & animation settings, define how the buttons display, and add/remove additional buttons as desired. Once you open the Customize Toolbar Window make any desired additions or removals just like you would before on the top UI section and close when finished. Note: Works with Firefox 4.0b7pre – 4.0.* Vertical Toolbar [Mozilla Add-ons] Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic] Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox Androidify Turns You into an Android-style Avatar Reader for Android Updates; Now with Feed Widgets and More

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  • Develop an iPad app with MonoTouch, C#, and .NET.

    - by Wallym
    Article url: http://www.devproconnections.com/article/mobile-development/ipad-ios-app-monotouch-143636 Since its release in March 2010, the iPad has taken the world by storm. Each new iPad release has launched the device further and further into our lives. Here are some interesting facts that we have seen over the past few years along with some market share analysis:The school that my teenagers attend here in Knoxville, Tennessee, was the first school in the United States to integrate the iPad into its teaching program and its curriculum. Many schools have since followed suit.There are a healthy number of applications in a variety of market segments. In fact, there is a market for iPad point-of-sale systems.The iPad is a popular device and growing more so each day. comScore states that one in four smartphone owners also owns a tablet. We also know that the iPad comprises 68 percent of the tablet market.eMarketer recently issued a report stating that the number of iPad users is expected to grow by 90 percent in the US in 2012.No matter how you slice the data, tablet usage is growing, and the iPad is currently leading the pack. The question for .NET developers is "How can I get me some of that?" Xamarin's MonoTouch offers help, by providing the means for .NET developers to leverage their C# and .NET coding skills to develop iPad applications. MonoTouch has supported the iPad since the initial release of the iOS 3.2 beta SDK all the way up to the most recent iOS SDK, which supports the iPad. In this article, we'll look at targeting the iPad and how we can take advantage of iPad-specific features in our iOS applications written with MonoTouch.I hope you enjoy the article and you find it helpful.

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  • What's wrong with cplusplus.com?

    - by Kerrek SB
    This is perhaps not a perfectly suitable forum for this question, but let me give it a shot, at the risk of being moved away. There are several references for the C++ standard library, including the invaluable ISO standard, MSDN, IBM, cppreference, and cplusplus. Personally, when writing C++ I need a reference that has quick random access, short load times and usage examples, and I've been finding cplusplus.com pretty useful. However, I've been hearing negative opinions about that website frequently here on SO, so I would like to get specific: What are the errors, misconceptions or bad pieces of advice given by cplusplus.com? What are the risks of using it to make coding decisions? Let me add this point: I want to be able to answer questions here on SO with accurate quotes of the standard, and thus I would like to post immediately-usable links, and cplusplus.com would have been my choice site were it not for this issue. Update: There have been many great responses, and I have seriously changed my view on cplusplus.com. I'd like to list a few choice results here; feel free to suggest more (and keep posting answers). As of June 29, 2011: Incorrect description of some algorithms (e.g. remove). Information about the behaviour of functions is sometimes incorrect (atoi), fails to mention special cases (strncpy), or omits vital information (iterator invalidation). Examples contain deprecated code (#include style). Inexact terminology is doing a disservice to learners and the general community ("STL", "compiler" vs "toolchain"). Incorrect and misleading description of the typeid keyword.

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  • Need Tech Support? Call the Star Wars Help Desk! [Video Classic]

    - by Asian Angel
    Having problems with the Tractor Beam? Did a weapons malfunction bring your computer system down? Is the Replicator making your Earl Grey Tea taste odd? Wait…what??!! Just call the Star Wars Help Desk to get the personalized help you need. Star Wars Help Desk [YouTube] Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic] Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox Androidify Turns You into an Android-style Avatar Reader for Android Updates; Now with Feed Widgets and More

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  • ASP.NET MVC localization DisplayNameAttribute alternatives: a good way

    - by Brian Schroer
    The ASP.NET MVC HTML helper methods like .LabelFor and .EditorFor use model metadata to autogenerate labels for model properties. By default it uses the property name for the label text, but if that’s not appropriate, you can use a DisplayName attribute to specify the desired label text: [DisplayName("Remember me?")] public bool RememberMe { get; set; } I’m working on a multi-language web site, so the labels need to be localized. I tried pointing the DisplayName attribute to a resource string: [DisplayName(MyResource.RememberMe)] public bool RememberMe { get; set; } …but that results in the compiler error "An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type”. I got around this by creating a custom LocalizedDisplayNameAttribute class that inherits from DisplayNameAttribute: 1: public class LocalizedDisplayNameAttribute : DisplayNameAttribute 2: { 3: public LocalizedDisplayNameAttribute(string resourceKey) 4: { 5: ResourceKey = resourceKey; 6: } 7:   8: public override string DisplayName 9: { 10: get 11: { 12: string displayName = MyResource.ResourceManager.GetString(ResourceKey); 13:   14: return string.IsNullOrEmpty(displayName) 15: ? string.Format("[[{0}]]", ResourceKey) 16: : displayName; 17: } 18: } 19:   20: private string ResourceKey { get; set; } 21: } Instead of a display string, it takes a constructor argument of a resource key. The DisplayName method is overridden to get the display string from the resource file (line 12). If the key is not found, I return a formatted string containing the key (e.g. “[[RememberMe]]”) so I can tell by looking at my web pages which resource keys I haven’t defined yet (line 15). The usage of my custom attribute in the model looks like this: [LocalizedDisplayName("RememberMe")] public bool RememberMe { get; set; } That was my first attempt at localized display names, and it’s a technique that I still use in some cases, but in my next post I’ll talk about the method that I now prefer, a custom DataAnnotationsModelMetadataProvider class…

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  • Desktop Fun: 21 Cool Ubuntu Wallpapers

    - by Vivek
    Ubuntu 10.04 was released last month, and comes with some breath taking design enhancements, and has some fabulous art work integrated into it. We’ve put together a collection of wallpapers to make it more customized. We thought of pulling out some of the best Ubuntu wallpapers in this post so that you have a good mix to choose from when you are slightly bored of the default Lucid Lynx (Ubuntu 10.04) wallpaper. The following is a collection of top 21 Ubuntu wallpapers. To download the wallpaper just click on the hyperlink above the image. Ubuntu Wallpapers EgFox Lucid Lynx Blue 2010 by ~Eg-Art EgFox Lucid Lynx K HD 2010 by ~Eg-Art Lucid Lynx 10 04 by ~Momez Ubokeh Wallpaper Pack by ~giantspeck lucid fog brown by ~darkburt EgFox Lucid Lynx HD 2010 by ~Eg-Art LTS 2010 by ~alkore31 Ubuntu Bokeh by ~ttk1opc Ubuntu Aurora by *monkeymagico Ubuntu by ~gorkisview Ubuntu Glow by ~BigAction Destroy Ubuntu by ~lukeroberts Ubuntu Triskell by ~deviantdark Ubuntu 2.0 by ~monsteer Ubuntu leaves by ~sizakor Ubuntu Bokeh by ~freyr Ubuntu Brown leather distress by *monkeymagico Ubuntu Black Metal Hex by *monkeymagico Ubuntu gusty 4 walls by ~yf19-sama Ubuntu Wallpaper by ~Ruzzy2006 ubuntu-Gloss by ~SWOriginal Enjoy the new wallpaper to suit your desktop. You also might want to make sure and check out our Desktop Fun section for more collections of cool wallpapers. Similar Articles Productive Geek Tips Windows 7 Welcome Screen Taking Forever? Here’s the Fix (Maybe)Allow Remote Control To Your Desktop On UbuntuCheck your Disk Usage on Ubuntu from the command lineDual Monitors: Use a Different Wallpaper on Each Desktop in Windows 7, Vista or XPDesktop Fun: Starship Theme Wallpapers TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips VMware Workstation 7 Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Enhance Your Laptop’s Battery Life With These Tips Easily Search Food Recipes With Recipe Chimp Tech Fanboys Field Guide Check these Awesome Chrome Add-ons iFixit Offers Gadget Repair Manuals Online Vista style sidebar for Windows 7

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  • SpellBook Parks Bookmarklets in Chrome’s Context Menu

    - by ETC
    If you want your bookmarklets right at your finger tips instead of stashed in your bookmarks menu, SpellBook is a handy Chrome extension that parks them right in the context menu. Install SpellBook and save your favorite bookmarklets in the “Bookmarklets” folder it creates for you. All the saved bookmarklets will be available in Chrome’s right-click context menu (as seen in the screenshot here). SpellBook is a free download and works wherever Chrome does. Hit up the link below to grab a copy. SpellBook [Chrome Extension Gallery via Download Squad] Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Never Call Me at Work [Humorous Star Wars Video] Add an Image Properties Listing to the Context Menu in Chrome and Iron Add an Easy to View Notification Badge to Tabs in Firefox SpellBook Parks Bookmarklets in Chrome’s Context Menu Drag2Up Brings Multi-Source Drag and Drop Uploading to Firefox Enchanted Swing in the Forest Wallpaper

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  • JMX Based Monitoring - Part One

    - by Anthony Shorten
    In all versions of the Oracle Utilities Application Framework there is an ability to use Java Management eXtensions (JMX) to both manage and monitor the various components of the product. This means that sites can use a JSR120 compliant JMX browser or JMX console to view or manage the components of the product with little or no configuration required. In each version we have progressively added JMX capabilities to allow IT groups more detailed information. In Oracle Utilities Application Framework V2.1 and above it was possible to use JMX on the Web Application Server provided Mbeans to allow you to monitor the online component of the product as well as manage the configuration. Also with a few additional java options it is possible to get a good level of detail about the Java Virtual machine including memory and thread usage. In Oracle Utilities Application Framework V2.2 and above, we added support for Java 5 statistics (Java enabled them by default), database pool statistics and also added the ability to manage and moinitor the batch component of the architecture. Now, in Oracle Utilities Application Framework V4 and above, we added support for Java 6 MXBeans, online management of the cache using JMX, additional JVM information and Performance monitoring using JMX. JMX allows the product to be managed from a common console such as Oracle Enterprise Manager, Tivoli, HP OpenView (and a lot more). Over the next week or so I will be compiling a set of blog entries discussing what is available (in summary format) using JMX and how to get access to the JMX statistics for your version of the product.

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  • Is duck typing a subset of polymorphism

    - by Raynos
    From Polymorphism on WIkipedia In computer science, polymorphism is a programming language feature that allows values of different data types to be handled using a uniform interface. From duck typing on Wikipedia In computer programming with object-oriented programming languages, duck typing is a style of dynamic typing in which an object's current set of methods and properties determines the valid semantics, rather than its inheritance from a particular class or implementation of a specific interface. My interpretation is that based on duck typing, the objects methods/properties determine the valid semantics. Meaning that the objects current shape determines the interface it upholds. From polymorphism you can say a function is polymorphic if it accepts multiple different data types as long as they uphold an interface. So if a function can duck type, it can accept multiple different data types and operate on them as long as those data types have the correct methods/properties and thus uphold the interface. (Usage of the term interface is meant not as a code construct but more as a descriptive, documenting construct) What is the correct relationship between ducktyping and polymorphism ? If a language can duck type, does it mean it can do polymorphism ?

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  • Why can I not map a dynamic texture in D3D?

    - by sebf
    I am trying to map a Texture2D resource in DirectX11 via SharpDX. The resource is declared as a ShaderResource, with Dynamic usage and the 'Write' CPU flag specified. My call however fails with a generic exception from SharpDX: _Parent.Context.MapSubresource( _Resource, 0, SharpDX.Direct3D11.MapMode.Write, SharpDX.Direct3D11.MapFlags.None, out stream ); I see from this question that it is supported. The MSDN docs and this other question hint that instead of using Context.MapSubresource() I should be using Texture2D.Map(), however, the DirectX11 Texture2D class does not define Map() (though it does for the D3D 10 equivalent). If I call the above with MapMode.WriteDiscard, the call succeeds but in this case the previous content of the texture is lost, which is no good when I only want to update a section of it. Has the Map() method been removed in Direct3D 11 or am I looking in the wrong place? Is the MapSubresource() method unsuitable or am I using it wrong? EDIT: I declared my resource as Dynamic with CPU Write Flags - not Default as I originaly wrote - sorry for the fairly huge 'typo' that changes the entire question!

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  • Get the MakeUseOf eBook Guide to Speeding Up Windows for Free

    - by ETC
    Our friends over at MakeUseOf.com have released yet another eBook in their series of Guides to, well, just about everything. This one gives you some tips for speeding up your Windows PC. The guide has a ton of different tips, and while I wouldn’t necessarily say you follow every single tip to the letter (since everybody’s setup is different), it does give you lots of great ideas for speeding up your PC, as well as links to resources, and instructions for how to perform various cleanup tasks. The best tips? Make sure to keep your PC crapware-free, upgrade your RAM if you’re low, scan for viruses, and run some type of disk cleanup on a regular basis. Download the MakeUseOf Windows on Speed Guide (PDF) [Direct Download Link] Windows on Speed [MakeUseOf] Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic] Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox Androidify Turns You into an Android-style Avatar Reader for Android Updates; Now with Feed Widgets and More

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  • How to Find Your IP Address in Ubuntu Linux

    - by Trevor Bekolay
    In Windows, we use the command-line program ipconfig to find out our IP address. How do you find it in Ubuntu? We will show you two locations easily accessible through the GUI and, of course, a terminal command that will get your IP address in no time. The first location, and the easiest in most cases, is found by right clicking the network icon in the notification area and clicking Connection Information. This brings up a window which has a bunch of information, including your IP address. The second location, which shows you more detail than this first method, is at System > Administration > Network Tools. Select the right network device, and you’ve got a ton of information at your fingertips. Finally, if you can’t tear yourself away from a terminal window, the command to type in is: ifconfig Yes, it’s only one character different than ipconfig. Who would have guessed? As it turns out, you’re always a few clicks or keystrokes away from finding your IP address in Ubuntu. Isn’t choice great? Similar Articles Productive Geek Tips Change Ubuntu Desktop from DHCP to a Static IP AddressAdding extra Repositories on UbuntuClear the Auto-Complete Email Address Cache in OutlookMake Firefox Display Large Images Full SizeChange Ubuntu Server from DHCP to a Static IP Address TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows Track Daily Goals With 42Goals Video Toolbox is a Superb Online Video Editor Fun with 47 charts and graphs Tomorrow is Mother’s Day Check the Average Speed of YouTube Videos You’ve Watched OutlookStatView Scans and Displays General Usage Statistics

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  • Following the Thread in OSB

    - by Antony Reynolds
    Threading in OSB The Scenario I recently led an OSB POC where we needed to get high throughput from an OSB pipeline that had the following logic: 1. Receive Request 2. Send Request to External System 3. If Response has a particular value   3.1 Modify Request   3.2 Resend Request to External System 4. Send Response back to Requestor All looks very straightforward and no nasty wrinkles along the way.  The flow was implemented in OSB as follows (see diagram for more details): Proxy Service to Receive Request and Send Response Request Pipeline   Copies Original Request for use in step 3 Route Node   Sends Request to External System exposed as a Business Service Response Pipeline   Checks Response to Check If Request Needs to Be Resubmitted Modify Request Callout to External System (same Business Service as Route Node) The Proxy and the Business Service were each assigned their own Work Manager, effectively giving each of them their own thread pool. The Surprise Imagine our surprise when, on stressing the system we saw it lock up, with large numbers of blocked threads.  The reason for the lock up is due to some subtleties in the OSB thread model which is the topic of this post.   Basic Thread Model OSB goes to great lengths to avoid holding on to threads.  Lets start by looking at how how OSB deals with a simple request/response routing to a business service in a route node. Most Business Services are implemented by OSB in two parts.  The first part uses the request thread to send the request to the target.  In the diagram this is represented by the thread T1.  After sending the request to the target (the Business Service in our diagram) the request thread is released back to whatever pool it came from.  A multiplexor (muxer) is used to wait for the response.  When the response is received the muxer hands off the response to a new thread that is used to execute the response pipeline, this is represented in the diagram by T2. OSB allows you to assign different Work Managers and hence different thread pools to each Proxy Service and Business Service.  In out example we have the “Proxy Service Work Manager” assigned to the Proxy Service and the “Business Service Work Manager” assigned to the Business Service.  Note that the Business Service Work Manager is only used to assign the thread to process the response, it is never used to process the request. This architecture means that while waiting for a response from a business service there are no threads in use, which makes for better scalability in terms of thread usage. First Wrinkle Note that if the Proxy and the Business Service both use the same Work Manager then there is potential for starvation.  For example: Request Pipeline makes a blocking callout, say to perform a database read. Business Service response tries to allocate a thread from thread pool but all threads are blocked in the database read. New requests arrive and contend with responses arriving for the available threads. Similar problems can occur if the response pipeline blocks for some reason, maybe a database update for example. Solution The solution to this is to make sure that the Proxy and Business Service use different Work Managers so that they do not contend with each other for threads. Do Nothing Route Thread Model So what happens if there is no route node?  In this case OSB just echoes the Request message as a Response message, but what happens to the threads?  OSB still uses a separate thread for the response, but in this case the Work Manager used is the Default Work Manager. So this is really a special case of the Basic Thread Model discussed above, except that the response pipeline will always execute on the Default Work Manager.   Proxy Chaining Thread Model So what happens when the route node is actually calling a Proxy Service rather than a Business Service, does the second Proxy Service use its own Thread or does it re-use the thread of the original Request Pipeline? Well as you can see from the diagram when a route node calls another proxy service then the original Work Manager is used for both request pipelines.  Similarly the response pipeline uses the Work Manager associated with the ultimate Business Service invoked via a Route Node.  This actually fits in with the earlier description I gave about Business Services and by extension Route Nodes they “… uses the request thread to send the request to the target”. Call Out Threading Model So what happens when you make a Service Callout to a Business Service from within a pipeline.  The documentation says that “The pipeline processor will block the thread until the response arrives asynchronously” when using a Service Callout.  What this means is that the target Business Service is called using the pipeline thread but the response is also handled by the pipeline thread.  This implies that the pipeline thread blocks waiting for a response.  It is the handling of this response that behaves in an unexpected way. When a Business Service is called via a Service Callout, the calling thread is suspended after sending the request, but unlike the Route Node case the thread is not released, it waits for the response.  The muxer uses the Business Service Work Manager to allocate a thread to process the response, but in this case processing the response means getting the response and notifying the blocked pipeline thread that the response is available.  The original pipeline thread can then continue to process the response. Second Wrinkle This leads to an unfortunate wrinkle.  If the Business Service is using the same Work Manager as the Pipeline then it is possible for starvation or a deadlock to occur.  The scenario is as follows: Pipeline makes a Callout and the thread is suspended but still allocated Multiple Pipeline instances using the same Work Manager are in this state (common for a system under load) Response comes back but all Work Manager threads are allocated to blocked pipelines. Response cannot be processed and so pipeline threads never unblock – deadlock! Solution The solution to this is to make sure that any Business Services used by a Callout in a pipeline use a different Work Manager to the pipeline itself. The Solution to My Problem Looking back at my original workflow we see that the same Business Service is called twice, once in a Routing Node and once in a Response Pipeline Callout.  This was what was causing my problem because the response pipeline was using the Business Service Work Manager, but the Service Callout wanted to use the same Work Manager to handle the responses and so eventually my Response Pipeline hogged all the available threads so no responses could be processed. The solution was to create a second Business Service pointing to the same location as the original Business Service, the only difference was to assign a different Work Manager to this Business Service.  This ensured that when the Service Callout completed there were always threads available to process the response because the response processing from the Service Callout had its own dedicated Work Manager. Summary Request Pipeline Executes on Proxy Work Manager (WM) Thread so limited by setting of that WM.  If no WM specified then uses WLS default WM. Route Node Request sent using Proxy WM Thread Proxy WM Thread is released before getting response Muxer is used to handle response Muxer hands off response to Business Service (BS) WM Response Pipeline Executes on Routed Business Service WM Thread so limited by setting of that WM.  If no WM specified then uses WLS default WM. No Route Node (Echo functionality) Proxy WM thread released New thread from the default WM used for response pipeline Service Callout Request sent using proxy pipeline thread Proxy thread is suspended (not released) until the response comes back Notification of response handled by BS WM thread so limited by setting of that WM.  If no WM specified then uses WLS default WM. Note this is a very short lived use of the thread After notification by callout BS WM thread that thread is released and execution continues on the original pipeline thread. Route/Callout to Proxy Service Request Pipeline of callee executes on requestor thread Response Pipeline of caller executes on response thread of requested proxy Throttling Request message may be queued if limit reached. Requesting thread is released (route node) or suspended (callout) So what this means is that you may get deadlocks caused by thread starvation if you use the same thread pool for the business service in a route node and the business service in a callout from the response pipeline because the callout will need a notification thread from the same thread pool as the response pipeline.  This was the problem we were having. You get a similar problem if you use the same work manager for the proxy request pipeline and a business service callout from that request pipeline. It also means you may want to have different work managers for the proxy and business service in the route node. Basically you need to think carefully about how threading impacts your proxy services. References Thanks to Jay Kasi, Gerald Nunn and Deb Ayers for helping to explain this to me.  Any errors are my own and not theirs.  Also thanks to my colleagues Milind Pandit and Prasad Bopardikar who travelled this road with me. OSB Thread Model Great Blog Post on Thread Usage in OSB

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  • Schmelp Portal, Help Portal: Oracle Fusion Applications Help Online

    - by ultan o'broin
    Yes, the Oracle Fusion Applications Help (or "Help Portal" to us insiders) is now available. Click the link fusionhelp.oracle.com and check it out! Oracle Fusion Applications Help user interface If you're developing your own help for Fusion Apps, then you can use the newly published Oracle Fusion Help User Interface Guidelines to understand the best usage. These guidelines are also a handy way to get to the embedded help design patterns for Oracle Fusion Applications, now also available. To customize and extend the help content itself no longer requires the engagement of your IT Department or expensive project work. Customers can now use the Manage Custom Help capability to edit or add whatever content they need, make it secure and searchable, and develop a community around it too. You can see more of that capability in this slideshare.net presentation from UKOUG Ireland 2012 about the Oracle Fusion Applications User Assistance and Support Ecosystem by Ultan O'Broin and Richard Bingham. Manage Custom Help capability To understand the science and craft that went into the creation and delivery of the "Help Portal" (cardiac arrests all round in Legal and Marketing Depts), then check out this great white paper by Ultan O'Broin and Laurie Pattison: Putting the User into Oracle Fusion Applications User Assistance. So, what's with this "Help Portal" name? Well, that's an internal (that is, internal to Oracle) name only and we should all really call it by the correct product listing name: Oracle Fusion Applications Help. To be honest, I don't care what you call it as long as it is useful. However, these internal names can be problematic when talking with support or the licensing people. For years, we referred casually to the Oracle Applications Help or Oracle Applications Help System that ships with the Oracle E-Business Suite products as "iHelp". Then, somebody went and bought Siebel. Game over.

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  • "Oracle Fusion Is Worth Your Consideration," States Mark Smith of Ventana Research

    - by Richard Lefebvre
    After attending OOW 2012, Mark Smith of Ventana Research has written a great blog post on Oct 4th, 2012 titled "Oracle Fusion for CRM and HCM Ready with a Mobile Tap." In this blog post, Mark goes on to say: "It was a great opportunity to get close to the Oracle Fusion Applications, which the company presented as proven and ready, with customers using them on-premises and in private and public cloud computing usage methods. In keynotes from executives Larry Ellison, Mark Hurd and Thomas Kurian and application-focused sessions with executives Steve Miranda and Chris Leone, Oracle repeated the message that Fusion Applications are not just for cloud computing and web services but are also accessible through mobile technology called Oracle Fusion Tap that operates natively on the Apple iPad. The company left no confusion about its applications' readiness for cloud and mobile computing, and provided insight into future advancements." Mark also states: " After two days of Oracle and customer sessions, along with a visit to the demonstration stands in the exposition area, it was clear that Oracle has made an important change in its approach to the market and its executive-level commitment to Fusion Applications. I saw more dialogue with partners to complement its applications, and many announcements, including Oracle's on partners in Fusion CRM, who were also visible during presentations and demonstrations." In closing, Mark makes the following proclamation: "Oracle Fusion is worth your consideration whether you are considering a move to cloud computing or still run applications on-premises or use a hybrid approach which provides more choices to customers than just a cloud computing only approach. We are now in a renaissance of business driving what it needs from business applications, and vendors that convince business they can be trusted will be at the center of a new world of cloud, mobile and social computing." This post is really worth a read. You can find the entire post here.

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  • How to Change Ubuntu’s Window Borders with Emerald

    - by The Geek
    The look of your operating system is all about the panels and the window borders, so now that we’ve shown you how to customize your panels, it’s time to customize the window borders to make Ubuntu look the way you want it to. For the purposes of this article, we’re going to assume that you’ve got the Compiz compositing window manager running—which is what provides the custom window effects found in Ubuntu. This means the technique probably won’t work in a virtual machine, or a really old PC. This is the third installment of our series on customizing Ubuntu by geeky reader Omar Hafiz—be sure and check out the first article, where he explained how to make your panels transparent, and the second article, where he explained how to customize the fonts and colors of those panels Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Never Call Me at Work [Humorous Star Wars Video] Add an Image Properties Listing to the Context Menu in Chrome and Iron Add an Easy to View Notification Badge to Tabs in Firefox SpellBook Parks Bookmarklets in Chrome’s Context Menu Drag2Up Brings Multi-Source Drag and Drop Uploading to Firefox Enchanted Swing in the Forest Wallpaper

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  • Whats consuming HDD Space

    - by Umair Mustafa
    I have single partition of 92GB in which I installed Ubuntu 12.04. And for some Unknown reason a message pop ups saying that I only have 1GB of HDD space left. I ran command sudo du -hscx * on / and /home /home gave me this result 4.0K C:\nppdf32Log\debuglog.txt 0 convertedvideo.avi 176M Desktop 16K Documents 169M Downloads 4.0K examples.desktop 17M file.txt 4.0K Music 984K Pictures 4.0K Public 320K Red Hat 6.iso 2.5M syslog-ng_3.3.6.tar.gz 4.0K Templates 8.0K terminal.png 1.2M Thunderbird Attachments 698M ubuntu10.04LTS.iso 16K Ubuntu One 4.0K Untitled Folder 4.0K Videos 21G VirtualBox VMs 22G total And / gave me this result 81G home 0 initrd.img 0 initrd.img.old 833M lib 16K lost+found 68K media 4.0K mnt 260M opt du: cannot access `proc/8339/task/8339/fd/4': No such file or directory du: cannot access `proc/8339/task/8339/fdinfo/4': No such file or directory du: cannot access `proc/8339/fd/4': No such file or directory du: cannot access `proc/8339/fdinfo/4': No such file or directory 0 proc 640K root 908K run 8.6M sbin 4.0K selinux 4.0K srv 0 sys 148K tmp 3.3G usr 436M var 0 vmlinuz 0 vmlinuz.old 86G total If you look at the result returned by / it shows that /home is consuming 81GB but on the other hand /home returns only 22GB. I cant figure out whats consuming the HDD. I have not installed anything except Virtual Machines Perpetrator found using Disk Usage Analyzer

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  • To have a long life with the battery it has to be separated from the Laptop after each use

    - by laptopo1 dsad
    To have a long life with the battery it has to be separated from the Laptop after each use Developing a Laptop and concern about it's battery life Don't be concerned follow this advice how to deal with your Laptop battery. A fresh power supply of your Laptop can be purchased in a very low charge condition, and must be fully charged before use. A different battery pack needs to be fully charged and fully discharged or cycled as much as five times to condition them into performing at full capacity. And also refer your manual instructions of one's Laptop for charging instructions. Inspiron 15z battery Tips: Unplug battery after use: To have a long life with the battery it has to be separated from the Laptop after each use. Clean battery contacts often: Clean your battery's metal contacts once in a month with a cloth moistened with rubbing alcohol. This prevents the transfer of power out of your battery additional efficient. Turn off the WiFi and Bluetooth, in any other case being used: Usually, we activate our WiFi or Bluetooth for whatever reason and tend to forget to Off it, that could spark a huge relieve your battery, Shut off right after the usage. Dell XPS L501x battery Dim notebook screen: When you're with your Laptop in Daytime, you will need for full brightness. But also in case of Night, just dim the screen reducing brightness, which will consume more charge once the brightness might be more and also It's essential on your eyes to determine lesser brighten screen inside nights. Dell Inspiron 17R battery Have hardly any Background programs: Letting more programs to own behind the screen could consume more Dell Inspiron N4010 battery charge hence have very few without background programs are Better. Make use of the Hard disk drive more than CD/DVD drive: Making use of disc drive instead your CD/DVD drive could consume less battery power. Latitude E5400 Battery

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  • Partner Webcast – Platform as a Service with Oracle WebLogic and OpenStack

    - by Thanos Terentes Printzios
    Platform as a service is defined as Platform that facilitates the deployment of applications without the complexity of buying and managing the underlying hardware and software and provisioning hosting capabilities. For Java EE, that would mean an elastic Java EE platform, where the user (IT admin) deploys the application, and then the platform itself takes care of meeting the SLA. With combination of Oracle WebLogic 12c with Dynamic Clusters, Oracle Solaris 11.2 with OpenStack and some scripting, we can completely automate infrastructure and platform provisioning, effectively providing PaaS to the IT users. Join us in this webcast as explore the usage of Weblogic 12c with Openstack, to establish Platform as a Service. Agenda: PaaS overview and goals Overview of Solaris 11.2 with OpenStack Deploying WebLogic domain to Solaris 11.2 and creating base image Automating provisioning Solution Demo Summary & Q&A Delivery Format This FREE online LIVE eSeminar will be delivered over the Web. Registrations received less than 24hours prior to start time may not receive confirmation to attend. Presenter:  Jernej Kase – FMW Specialist, Oracle Partner Hub Migration Center Date: Thursday, June 26th, 10am CET (9am GMT/11am EEST) Duration: 1 hour Register Here: http://www.oracle.com/go/?Src=8101420&Act=4&pcode=EMEAPM14056477MPP002 For any questions please contact us at partner.imc-AT-beehiveonline.oracle-DOT-com Stay Connected Oracle Newsletters

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  • Reader for Android Updates; Now with Feed Widgets and More

    - by ETC
    Android phone owners rocking the official Google Reader app will be pleased to see the new update includes much requested features such as polished feed widgets, unread counter widgets, and a handy “mark previous as read” button. Widgets have long been one of the most requested feature for Google Reader for Android. This update rolls them out in two forms. News ticker widgets show you current headlines for your Google Reader folders (as seen in the screenshot here); folder widgets function just as unread counters and only take up a 1×1 space. In addition to the widgets another much requested feature made an appearance. While scrolling through your feed you can now mark all the previous entries as read. Hit up the link below to read more or visit the Android Market on your phone to update the application. Updates to the Google Reader App for Android [The Official Google Reader Blog] Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic] Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox Androidify Turns You into an Android-style Avatar Reader for Android Updates; Now with Feed Widgets and More

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  • What free Remote Desktop (server) solutions are there?

    - by Tao
    I know Ubuntu comes with a "Remote Desktop" option that appears to be a straightforward VNC server, and I'm trying to understand the alternatives. Here are the possibilities I've heard about so far: VNC VNC + SSH Tunnelling NX Server, free edition FreeNX NeatX X2Go X11 Forwarding over SSH xrdp I'm coming at this from a Windows user's perspective: To the best of my experience, RDP (aka Terminal Services) is a reasonably secure (barring mitm/server spoofing), efficient desktop sharing protocol with well-supported clients, that can be exposed to the internet when necessary without major fears of intrusion. To the best of my knowledge straight VNC is none of those things, which is where I get confused - why wouldn't a better desktop sharing technology be developed or used in the open-source world? I know VNC can be wrapped with SSH, but that seems beyond the reach of a casual user. X11 forwarding over SSH may be more or less efficient, I have no idea, but is definitely even more complicated, and doesn't (as far as I know) give you access to already-running stuff (no desktop sharing as such, just remote application running). So, I'd like any feedback/preferences amongst these or any other "Free" desktop sharing options, using these criteria and/or any others: Security (esp. for access across internet) Efficiency (bandwidth usage, responsiveness, etc) Free-ness, as in Speech (not sure where RDP or FreeNX lie for this) Free-ness, as in Beer (are there any commercial solutions with usable dependable free offerings?) Ease of use (server and client side) Cross-OS Client availability Cross-OS Server availability Support for independent sessions and shared (and/or "Console") sessions Ongoing support/maintenance/development Thanks!

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  • Windows Azure Evolution &ndash; Preview Developer Portal

    - by Shaun
    With the MEET Windows Azure event on 7th June, there are many new features and updates in windows azure platform. In the coming several posts I will try to cover some of them. And in the first post here I would like to just have a quick walkthrough of the new preview developer portal.   History of the Developer Portal If you have been working with windows azure since 2009 or 2010, you should remember the first version of the developer portal. It was built in HTML with very limited features. I have the impression when I was using is old one. The layout is not that attractive and you have very limited features. On November, 2010 alone with the SDK 1.3 release, the developer portal was getting a big jump. In order to give more usability and features this it turned to be built on Silverlight. Hence it runs like a desktop application with many windows, lists, commands and context menus. From 2010 till now many features were involved into this portal, such as the remote desktop, co-admin, virtual connect, VM role, etc.. And the portal itself became more and more complicated. But it brought some problems by using the Silverlight. The first one is the browser capability. As you know in most mobile and tablet device the browser doesn’t allow the rich content plugin, such as Flash and Silverlight. This means people cannot open and configure their azure services from their iPad, iPhone and Windows Phone, etc., even though what they need may just be restart a hosted service, or view the status of their databases. Another problem is the performance. Silverlight provides rich experience to the users, but also needs more bandwidth. So in this upgrade the preview developer portal will be back to use HTML, with JavaScript, as a mobile friendly, cross browser, interactively web site.   Preview Portal vs. Silverlight Portal Before I started to talk about the new preview portal I’d better highlight that, this preview portal is a PREVIEW version, which means even though you can do almost all features that already in the old one, as long as some cool new features I will mention in the coming several posts, there are something still under developed and migrated. So sometimes you need to switch back to the old one. For example, in preview portal there is no co-admin manage function, no remote desktop function and the SQL database manage function will take you back to the old SQL Azure Manage Portal. But as Microsoft said these missing features will be moved in the preview portal in the couple of next few months. Since the public URL of the developer portal, https://windows.azure.com/, had been changed to point to this preview one, you need to click to preview button on top of the page and click the “Take me to the previous portal” link.   Overview There are four parts in the preview portal. On the top is the header which shows the account you are currently logging in. If you click on the header it will show the top menu of windows azure, where you can navigate to the windows azure home page, the price information page, community and account, etc.. The navigation bar is on the left hand side, with the categories listed below. ALL ITEMS All items in your windows azure account, includes the web sites, services, databases, etc.. WEB SITES The web sites in your windows azure account. It will only show the web sites you have. The linked resources will be shown if you drill down into a web site. VIRTUAL MACHINES The virtual machines that you had been deployed to azure. CLOUD SERVICES All windows azure hosted services in your account. SQL DATABASES All SQL databases (SQL Azure) in your account. STORAGE All windows azure storage services in your account. NETWORKS The virtual network (Windows Azure Connect) you had been created. The available items will be listed in the main part of the page based on which category your currently selected. If there’s no item it will show the link to you to quick create. At the bottom of the page there will be the command and information bar. Based on what is selected and what is performed by the user, it will show the related information and commands. For example, in the image below when I was creating a new web site, the information bar told me that my web site is being provisioned; and there are two commands in the command bar. And once it ready the command bar will show some commands that I can do to my new web site. The “Web Sites” is a new feature introduced alone with this upgrade. It gives us an easier and quicker way to establish a website from the scratch or from some existing library. I will introduce it more details in the coming next post. Also in the command bar you can create a service by clicking the NEW button. It will slide the creation panel up to you.   Where’s My Hosted Services The Windows Azure Hosted Services had been renamed to the Cloud Services. Create a new service would be very easy. Just click the NEW button at the bottom of the page, and select the CLOUD SERVICE and QIUICK CREATE. This will create a blank hosted service without deployment and certificate. It just needs you to specify the service URL and the affinity/region. Then the service will be shown in the list. If you clicked the item all information will be shown in the main part. Since there’s no package deployed to this service so currently we cannot see any information about it. But we can upload the package by using the command at the bottom. And as you can see, we could manage the configuration, instances, certificates and we can scale up and down (change the VM size), in and out (increase and decrease the instance count) to our service. Assuming I had created an ASP.NET MVC 3 web role project in Visual Studio and completed the package. Then I can click the UPLOAD button in this page to deploy my package. In the popping up window I just specify my deployment name, package file and configure file. Also I can check the box below so that it will NOT warn me if only one instance of this deployment. Once we clicked the OK button our package will be uploaded and provisioned by the platform. After a while we can see the service was ready from the information bar. We can have the basic information about this service and deployment if we to the dashboard page. For example the usage overview diagram, status, URL, public IP address, etc.. In the configure page we can view and change the CSCFG content such as the monitor setting, connection strings, OS family. In scale page we can increase and decrease the count of the instances. And in the instances page we can view all instances status. And, if your services is using some SQL databases and storages they will be shown as the linked resources under the linked resources page. And you can manage the certificates of this service as well under the certificates page.   How About My Storage Services The storage service can be managed by clicking into the STORAGES link in the navigation bar. And we can create a new storage service from the NEW button. After specify the storage name and region it will be previsioned by the platform. If you want to copy or manage the storage key you can just click the Manage Keys button at the bottom, which is very easy. What I want to highlight here is that, you can monitor your storage service by enabling the monitor configuration. Click the storage item in the list and navigate to the configure page. As you can see in the page you can enable the monitoring for blob, table and queue. And you can also enable the logging when any requests come to the storage. But as the tooltip shown in the page, enabling the monitoring and logging will increase the usage of the storage, which means increase the bill of them. So make sure you enable them properly.   And My SQL Databases (SQL Azure) The last thing I want to quick introduce is the SQL databases, which was formally named SQL Azure. You can create a new SQL Database Server and a new database by clicking the ADD button under the SQL Database navigation item. In the popping up windows just specify the database name, the edition, size, collation and the server. You can select an existing SQL Database Server if you have, or cerate a new one. If you selected to create a new server, there will be another step you need to do, which is specify the server login, password and the region. Once it ready you can mange your databases as well as the servers in the portal. In a particular server you can update the firewall settings in its Configure page. So, What Else There are some other area on the preview portal I didn’t cover, such as the virtual machines, virtual network and web sites. Regarding the virtual machines and web sites I will talk about them in the future separated post. Regarding the virtual network, it the Windows Azure Connect we are familiar with. But as I mention in the beginning of this post, the preview portal is still under developed. Some features are not available here. For example, you cannot manage the co-admin of your subscriptions, you cannot open the remote desktop on your hosted services, and you cannot navigate to the Windows Azure Service Bus, Access Control and Caching, which formally named Windows Azure AppFabric directly. In these cases you need to navigate back to the old portal. So in the coming several months we might need to use both these two sites.   Summary In this post I quick introduced the new windows azure developer portal. Since it had been rearranged and renamed I demonstrated some features that existing in the old portal, such as how to create and deploy a hosted service, how to provision a storage service and SQL database. All features in the old portal had been, is being and will be migrated into this new portal, but some of them were in a different category and page we need to figure out.   Hope this helps, Shaun All documents and related graphics, codes are provided "AS IS" without warranty of any kind. Copyright © Shaun Ziyan Xu. This work is licensed under the Creative Commons License.

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  • Add a Graphical User Interface (GUI) to the Microsoft Robocopy Command Line Tool

    - by Lori Kaufman
    Robocopy, or “Robust File Copy,” is a command line directory replication tool from Microsoft. It is available as part of Windows 7 and Vista as a standard feature, and was available as part of the Windows Server 2003 Resource Kit. NOTE: For Windows XP, you can obtain Robocopy by downloading the resource kit. Robocopy allows you to setup simple or advanced backup strategies. It provides such features as multi-threaded copying, mirroring or synchronization mode, automatic retry, and the ability to resume the copying process. If you are comfortable with using command line tools, you can run Robocopy directly on the command line using the command syntax and options. You can also download the command line reference and usage notes for Robocopy as a PDF file. If you are more comfortable using a graphical user interface, or GUI, rather than the command line, there are a couple of options for adding a GUI to the Robocopy command line tool, making it easier to use. Both tools, RoboMirror and RichCopy, are discussed below and links to download each tool are provided. How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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