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• Chicago Code Camp Recap

  - by Tim Murphy

  My presentation on leveraging Open XML was a great experience and the attendees were very gracious.  I was pleasantly surprised to have a full room.  There was even one person sitting on the floor.  You can check out some pictures here.  I have posted my slides and code.  If anyone has any feedback or questions feel free to contact me. del.icio.us Tags: Chicago Code Camp,OOXML SDK 2.0,Office Open XML,slides,code

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• Tutorial: Mastering Redirection in BASH on Linux

  Linux's BASH shell has several ways to redirect inputs and outputs, which has a multitude of uses in server administration, and desktop search and admininstration. Juliet Kemp guides us through the finer points of these powerful BASH features.

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• SQL SERVER Difference Between GRANT and WITH GRANT

  This was very interesting question recently asked me to during my session at TechMela Nepal. The question is what is the difference between GRANT and WITH GRANT when giving permissions to user.Let us first see syntax for the same.GRANT:USE master;GRANTVIEW ANY DATABASETO username;GOWITH GRANT:USE master;GRANTVIEW ANY DATABASETO username WITHGRANTOPTION;GOThe difference between both of this option [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• SOA Management in 3 minutes - Video explainer

  - by J Swaroop

  Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Today’s CIOs and IT executives face challenges that take valuable time away from more strategic business objectives. They have to keep their systems running 24/7, manage increasingly complex applications, and more as part of their SOA environment. Watch this quick 3 minute video explainer to Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} learn how Oracle EM Management Pack Plus for SOA is engineered to deliver value right out of the box with a fully centralized management console - with a rich set of service and system level dashboards, administrators can view service levels for key business processes and SOA infrastructure components from a central location. Watch the 3 minute video explainer

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• What Would a CyberWar Do To Your Business?

  - by Brian Dayton

  In mid-February the Bipartisan Policy Center in the United States hosted Cyber ShockWave, a simulation of how the country might respond to a catastrophic cyber event. An attack takes place, they can't isolate where it came from or who did it, simulated press reports and market impacts...and the participants in the exercise have to brief the President and advise him/her on what to do. Last week, Former Department of Homeland Security Secretary Michael Chertoff who participated in the exercise summarized his findings in Federal Computer Weekly. The article, given FCW's readership and the topic is obviously focused on the public sector and US Federal policies. However, it touches on some broader issues that impact the private sector as well--which are applicable to any government and country/region-- such as: ·         How would the US (or any) government collaborate to identify and defeat such an attack? Chertoff calls this out as a current gap. How do the public and private sector collaborate today? How would the massive and disparate collection of agencies and companies act together in a crunch? ·         What would the impact on industries and global economies be? Chertoff, and a companion article in Government Computer News, only touch briefly on the subject--focusing on the impact on capital markets. "There's no question this has a disastrous impact on the economy," said Stephen Friedman, former director of the National Economic Council under President George W. Bush who played the role of treasury secretary. "You have financial markets shut down at this point, ordinary transactions are dramatically depleted, there's no question that this has a major impact on consumer confidence." That Got Me Thinking ·         How would it impact Oracle's customers? I know they have business continuity plans--is this one of their scenarios? What if it's not? How would it impact manufacturing lines, ATM networks, customer call centers... ·         How would it impact me and the companies I rely on? The supermarket down the street, my Internet Service Provider, the service station where I bought gas last night.   I sure don't have any answers, and neither do Chertoff or the participants in the exercise. "I have to tell you that ... we are operating in a bit of unchartered territory." said Jamie Gorelick, a former deputy attorney general who played the role of attorney general in the exercise.    But it is a good thing that governments and businesses are considering this scenario and doing what they can to prevent it from happening.

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• Geographically limited / gradual release process

  - by daniel.sedlacek

  I am looking for more information on a gradual release process - that is when you release new version of a software only to certain set of end users, mostly geographically limited (or limited by a reach of particular server). Google seems to be blind to this term - that indicates that's not how it's called. What's the name then? EDIT: An example of what I mean is when Facebook rolled out new image galleries they were first visible to certain users only, then to whole US and then to the rest of the world.

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• Post Crosstalk 2012

  - by David Dorf

  This year the Oracle Retail users conference, Crosstalk, had a 20% increase in attendees, which was driven by both new customers and those acquired via Endeca.  As the product assets of Oracle have grown, so has the completeness of the solution set.  This year was marked by the breadth of omni-channel stories. Rose Spicer and her marketing team (see photo on left) always strive for an equal balance of retailer presentations, networking opportunities, and unique experiences -- this year was no exception.  We had 41 different retailers from China, Russia, South Africa, Brazil, Chile, US, Canada and the UK sharing their insights with one another. In all there were 251 executives from 120 iconic brands such as Daphne, Kohl's, Morrisons, Abercrombie & Fitch, Hot Topic, Talbots, Petco, Deckers, Sportmaster, Mr. Price, Falabella, and Disney to name a few. From a product perspective, there were a few new developments from Oracle Retail: Endeca's search engine has been integrated into the ATG commerce platform. The latest Retail Analytics application, Oracle Retail Customer Analytics, is generally available. Oracle Retail previewed a new fully-integrated mobile POS. But the real benefit of attending Crosstalk was hearing about the experiences of retailers and partners.  Here are are a few interesting facts I picked up: At Kohl's, the most popular website accessed by customers within their stores is Facebook.  With all the buzz about showrooming, I was really expecting it to be Amazon. Daphne, a Chinese shoe retailer, is opening 3 new stores per day.  Being located near the factories allows them to have a very agile supply chain as well. Disney Stores have increased sales by 25% at stores upgraded to include Mobile POS.  They continue to lead the pack with excellent customer experiences. Quicksilver reported that 1 in 5 visits to their website comes from a tablet.  More evidence that tablets are replacing traditional PCs in households. By tagging shoes with RFID, Saks is able to ensure all shoe models are on display.  If a model is not being displayed, it has no chance of being sold. Additionally, there were awards, store tours on Michigan Avenue, fireworks at Navy Pier, and the Oracle Retail house band, Bolo313, performing at Solider Field.  Speaking of which, a few retailers got on stage and jammed with band -- possible rival to Rock & Roll Retail? You can always find the latest info from us at the Retail Rack. The next events on tap are the Partner Summit followed by OpenWorld.

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• New SQL Code Deployment Book and Damn I Need to Blog More

  - by Rodney

  Select datediff(d,'02/19/2009',getdate()) This value returned from the above SELECT statement  is 398 and that is the number of days since my last blog post.  As I was formulating my apology for this hiatus from blogging, it dawned on me that I also do not twitter (sorry tweet) and as apologies beget apologies, I then realized that instead of catching up on the backlog of blogs, I should write a book about what I have been most focused on in the past year, one month and 3 days.  That focus is my day job, which of course, most of us have. And that day job we share is why most of us read blogs, tweets, articles and even books in the first place. So my focus for the past year has been SQL code deployments and all of that entails. I am fortunate that Redgate has agreed to entertain my crazy notion of writing an entire book about this subject, which I have tentatively titled, "The Sound and the Fury". Wait..that is not right. Oh yes, a title more befiting a techical tome but with as much profundity, "Standardizing SQL Server Code Deployements - A Redgate Guide". The great American novel must wait a few more years. As I begin this journey, I am inviting you to assist me in the discovery process and even be interviewed and included in the book itself. How do you do deployments in your company? Do you have a documented process or no process? Do you do code review or cross your fingers? Do you work for a small company or a Fortune 100 company? Government regulations or  garage? It does not  matter to me. I am not here to judge. I worked for both companies myself and have seen many things that you can relate to.  If you would like to participate and are one of the 3 people still reading this blog after 398 days, please fill out my survey and let's get started.  http://www.surveymonkey.com/s/RRG86RH  

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• More Chicago Code Camp Information

  - by Tim Murphy

  It seems the guys have posted the venue.  The Chicago Code Camp will be held at the Illinois Institute of Technology on May 1, 2010.  Sign up and join in. IIT- Stuart Building 10 West 31st Chicago, IL 60616   del.icio.us Tags: Chicago Code Camp

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• This Task Is Currently Locked by a Running Workflow and Cannot Be Edited

  - by Jayant Sharma

  Problem: In SharePoint Workflow, "This task is currently locked by a running workflow and cannot be edited" is the common exception, that we face. Solution: Generally this exception occurs 1.  when the number of items in the Task List gets highThis exception says that the workflow is not able to deliver the all the events at a given time and so the tasks get locked.  Out Of Box, the default event delivery throttle value is 15.  Event delivery throttle value Specifies the number of workflows that can be processed at the same time across all front-end Web serverslook at following link.(http://blogs.msdn.com/b/vincent_runge/archive/2008/09/16/about-the-workflow-eventdelivery-throttle-parameter.aspx)If the value returned by query is superior to the throttle (15 by default), any new workflow event will not be processed immediately. so we need to change it by stsadm command like...stsadm -o setproperty -pn workflow-eventdelivery-throttle -pv "20"(http://technet.microsoft.com/en-us/library/cc287939(office.12).aspx) 2. When we modify a Workflow Task from Custom TaskEdit Page.   when we try to modify the workflow task from outside workflow default Page, like custom workflow taskedit page. then is exception occurs.suppose we have custom task edit page with dropdown  and values are submitted/ Progress/ completed etc and we want to complete task from here. it will throw exception on SPWorkflowTask.AlterTask method, which changes the TaskStatus.When I debug, to find the root cause I actully found that the workflow is not locked. The InternalState flag of the workflow does not include the Locked flag bits(http://msdn.microsoft.com/en-us/library/dd928318(v=office.12).aspx) When I found this link http://geek.hubkey.com/2007/09/locked-workflow.htmlIt is exactly what I wanted. It says that "when the WorkflowVersion of the task list item is not equal to 1" then the error occurs. The solution that is propsed here works fantastically if ((int)task[SPBuiltInFieldId.WorkflowVersion] != 1){    SPList parentList = task.ParentList.ParentWeb.Lists[new Guid(task[SPBuiltInFieldId.WorkflowListId].ToString())];    SPListItem parentItem = parentList.Items.GetItemById((int)task[SPBuiltInFieldId.WorkflowItemId]);    SPWorkflow workflow = parentItem.Workflows[new Guid(task[SPBuiltInFieldId.WorkflowInstanceID].ToString())];    if (!workflow.IsLocked)    {       task[SPBuiltInFieldId.WorkflowVersion] = 1;       task.SystemUpdate();      break;    }} It will reset the workflow version to 1 again.Conclusion: This Exception is completely confusing. So, we need to find at first whether our workflow is really locked or not. If it is really locked then use 1st method. If not, then check the workflow version and set it to 1 again.Jayant Sharma

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• MDM 2010 Summit in San Francisco

  - by Tony Ouk

  Since 2006, the MDM Global Summit Series has brought master data expertise to more than 5,000 delegates worldwide. The Series is designed to reinforce the importance of data governance as a key factor to your MDM program's success while providing real-world experience and all-in-one access to solutions providers. Come join us June 2-3, 2010 at the Hyatt Regency in San Francisco.  For more information including registration details, visit the MDM Global Summit Series website.

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• Why The Brother MFC 7440N Printer Is Best For Small Workgroups

  The Brother MFC 7440N printer has the capabilities to be the professional print shop while sitting conveniently on the home desk or table. When the Brother 7440N laser toners (http://www.qtoner.us/Br... [Author: Ben Pate - Computers and Internet - March 21, 2010]

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• YouTube Developers Live: Freebase API for YouTube Developers

  YouTube Developers Live: Freebase API for YouTube Developers In this video, a special guest from the Freebase team, Shawn Simister is giving an overview of the Freebase and Topics API for YouTube API V3. To learn more about the Freebase API, see wiki.freebase.com For YouTube API V3, you can find more information here: developers.google.com Catch us live on Wednesdays, 10am Pacific at developers.google.com From: GoogleDevelopers Views: 87 18 ratings Time: 28:00 More in Science & Technology

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• What Is Nuclear Meltdown?

  - by Gopinath

  Japan was first hit by a massive earth quake, then a ruthless tsunami washed away thousands of homes and now they fear the worst – meltdown of nuclear power stations in the quake hit year. Nuclear meltdowns are horrifying – remember the Chernobyl incident in Russia? The Chernobyl reactor meltdown released 400 times more radio active material than the atomic bombing of Hiroshima. The effects of nuclear meltdowns are beyond imagination of a common man, thousands of people loose their lives and many more lakhs of people suffer with radiation related diseases for many years. Nuclear Meltdowns are dangerous, but how do they happen? What causes a nuclear meltdown? In simple terms – Nuclear meltdown is an accident that happens due to severe overheating of a nuclear reactor and results in release of nuclear radiation into the environment.  How A Nuclear Meltdown Happens? According to Wikipedia A meltdown occurs when a severe failure of a nuclear power plant system prevents proper cooling of the reactor core, to the extent that the nuclear fuel assemblies overheat and melt. A meltdown is considered very serious because of the potential that radioactive materials could be released into the environment. The fuel assemblies in a reactor core can melt if heat is not removed. A nuclear reactor does not have to remain critical for a core damage incident to occur, because decay heat continues to heat the reactor fuel assemblies after the reactor has shut down, though this heat decreases with time. A core damage accident is caused by the loss of sufficient cooling for the nuclear fuel within the reactor core. The reason may be one of several factors, including a loss of pressure control accident, a loss of coolant accident (LOCA), an uncontrolled power excursion or, in some types, a fire within the reactor core. Failures in control systems may cause a series of events resulting in loss of cooling. Contemporary safety principles of defense in depth, ensure that multiple layers of safety systems are always present to make such accidents unlikely. Video – What Causes Nuclear Meltdown AlJazeera news has a good analysis on feared nuclear meltdown of Japan’s nuclear plants and also an animation on what causes Nuclear Meltdown. cc image credit: flickr/jtjdt This article titled,What Is Nuclear Meltdown?, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Getting Started with Active Directory Rights Management Services for Exchange 2010

  With security concerns being a constant litany, it's worth considering Active Directory Rights Management Services as a powerful tool in your access-control arsenal, particularly when it integrates so neatly with Exchange 2010. Elie Bou Issa kindly takes us, step by step, through everything we need to know to install and start using this versatile technology like a pro.

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• Is hashing of just "username + password" as safe as salted hashing

  - by randomA

  I want to hash "user + password". EDIT: prehashing "user" would be an improvement, so my question is also for hashing "hash(user) + password". If cross-site same user is a problem then the hashing changed to hashing "hash(serviceName + user) + password" From what I read about salted hash, using "user + password" as input to hash function will help us avoid problem with reverse hash table hacking. The same thing can be said about rainbow table. Any reason why this is not as good as salted hashing?

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• SQL SERVER – Simple Explanation and Puzzle with SOUNDEX Function and DIFFERENCE Function

  - by pinaldave

  Earlier this week I asked a question where I asked how to Swap Values of the column without using CASE Statement. Read here: A Puzzle – Swap Value of Column Without Case Statement,there were more than 50 solutions proposed in the comment. There were many creative solutions. I have mentioned my personal favorite (different ones) here: Solution of Puzzle – Swap Value of Column Without Case Statement. However, I received lots of questions regarding one of the Solution by SIJIN KUMAR V P. He has used the function SOUNDEX in his solution. The request was to explain how SOUNDEX and DIFFERENCE works. Well, there are pretty decent documentations provided over here SOUNDEX function and DIFFERENCE over on MSDN and if I attempt to explain this function I will end up writing the same details which are available on MSDN. Instead of writing theory, we will try to learn this function by using a couple of simple puzzles. You try to solve the puzzles using the MSDN and see if you can learn something very quickly. In simple words - SOUNDEX converts an alphanumeric string to a four-character code to find similar-sounding words or names. The first character of the code is the first character of character_expression and the second through fourth characters of the code are numbers that represent the letters in the expression. Vowels incharacter_expression are ignored unless they are the first letter of the string. DIFFERENCE function returns an integer value. The  integer returned is the number of characters in the SOUNDEX values that are the same. The return value ranges from 0 through 4: 0 indicates weak or no similarity, and 4 indicates strong similarity or the same values. Learning Puzzle 1: Now let us run following four queries and observe its output. SELECT SOUNDEX('SQLAuthority') SdxValue SELECT SOUNDEX('SLTR') SdxValue SELECT SOUNDEX('SaLaTaRa') SdxValue SELECT SOUNDEX('SaLaTaRaM') SdxValue When you look at the result set all the four values are same. The reason for all the values to be same is as for SQL Server SOUNDEX function all the four strings are similarly sounding string. Learning Puzzle 2: Now let us run following five queries and observe its output. SELECT DIFFERENCE (SOUNDEX('SLTR'),SOUNDEX('SQLAuthority')) SELECT DIFFERENCE (SOUNDEX('TH'),SOUNDEX('SQLAuthority')) SELECT DIFFERENCE ('SQLAuthority',SOUNDEX('SQLAuthority')) SELECT DIFFERENCE ('SLTR',SOUNDEX('SQLAuthority')) SELECT DIFFERENCE ('SLTR','SQLAuthority') When you look at the result set you will get the result in the ranges from 1 to 4. Here is how it works if your result is 0 which means absolutely not relevant to each other and if your result is 1 which means the results are relevant to each other. Have you ever used above two functions in your business need or on production server? If yes, would you please leave a comment with use cases. I believe it will be beneficial to everyone. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• OCS Disaster Recovery – Part 1

  Office Communications Server stores its data in a variety of locations, which can make backing it up and disaster recovery a slightly tricky business. Thankfully, Johan Velduis is here to tell which databases and fileshares we need to worry about, and give us peace of mind.

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• Silverlight MEF – Download On Demand

  - by PeterTweed

  Take the Slalom Challenge at www.slalomchallenge.com! A common challenge with building complex applications in Silverlight is the initial download size of the xap file.  MEF enables us to build composable applications that allows us to build complex composite applications.  Wouldn’t it be great if we had a mechanism to spilt out components into different Silverlight applications in separate xap files and download the separate xap file only if needed?   MEF gives us the ability to do this.  This post will cover the basics needed to build such a composite application split between different silerlight applications and download the referenced silverlight application only when needed. Steps: 1.     Create a Silverlight 4 application 2.     Add references to the following assemblies: System.ComponentModel.Composition.dll System.ComponentModel.Composition.Initialization.dll 3.     Add a new Silverlight 4 application called ExternalSilverlightApplication to the solution that was created in step 1.  Ensure the new application is hosted in the web application for the solution and choose to not create a test page for the new application. 4.     Delete the App.xaml and MainPage.xaml files – they aren’t needed. 5.     Add references to the following assemblies in the ExternalSilverlightApplication project: System.ComponentModel.Composition.dll System.ComponentModel.Composition.Initialization.dll 6.     Ensure the two references above have their Copy Local values set to false.  As we will have these two assmblies in the original Silverlight application, we will have no need to include them in the built ExternalSilverlightApplication build. 7.     Add a new user control called LeftControl to the ExternalSilverlightApplication project. 8.     Replace the LayoutRoot Grid with the following xaml:     <Grid x:Name="LayoutRoot" Background="Beige" Margin="40" >         <Button Content="Left Content" Margin="30"></Button>     </Grid> 9.     Add the following statement to the top of the LeftControl.xaml.cs file using System.ComponentModel.Composition; 10.   Add the following attribute to the LeftControl class     [Export(typeof(LeftControl))]   This attribute tells MEF that the type LeftControl will be exported – i.e. made available for other applications to import and compose into the application. 11.   Add a new user control called RightControl to the ExternalSilverlightApplication project. 12.   Replace the LayoutRoot Grid with the following xaml:     <Grid x:Name="LayoutRoot" Background="Green" Margin="40"  >         <TextBlock Margin="40" Foreground="White" Text="Right Control" FontSize="16" VerticalAlignment="Center" HorizontalAlignment="Center" ></TextBlock>     </Grid> 13.   Add the following statement to the top of the RightControl.xaml.cs file using System.ComponentModel.Composition; 14.   Add the following attribute to the RightControl class     [Export(typeof(RightControl))] 15.   In your original Silverlight project add a reference to the ExternalSilverlightApplication project. 16.   Change the reference to the ExternalSilverlightApplication project to have it’s Copy Local value = false.  This will ensure that the referenced ExternalSilverlightApplication Silverlight application is not included in the original Silverlight application package when it it built.  The ExternalSilverlightApplication Silverlight application therefore has to be downloaded on demand by the original Silverlight application for it’s controls to be used. 1.     In your original Silverlight project add the following xaml to the LayoutRoot Grid in MainPage.xaml:         <Grid.RowDefinitions>             <RowDefinition Height="65*" />             <RowDefinition Height="235*" />         </Grid.RowDefinitions>         <Button Name="LoaderButton" Content="Download External Controls" Click="Button_Click"></Button>         <StackPanel Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Center" >             <Border Name="LeftContent" Background="Red" BorderBrush="Gray" CornerRadius="20"></Border>             <Border Name="RightContent" Background="Red" BorderBrush="Gray" CornerRadius="20"></Border>         </StackPanel>       The borders will hold the controls that will be downlaoded, imported and composed via MEF when the button is clicked. 2.     Add the following statement to the top of the MainPage.xaml.cs file using System.ComponentModel.Composition; 3.     Add the following properties to the MainPage class:         [Import(typeof(LeftControl))]         public LeftControl LeftUserControl { get; set; }         [Import(typeof(RightControl))]         public RightControl RightUserControl { get; set; }   This defines properties accepting LeftControl and RightControl types.  The attrributes are used to tell MEF the discovered type that should be applied to the property when composition occurs. 17.   Add the following event handler for the button click to the MainPage.xaml.cs file:         private void Button_Click(object sender, RoutedEventArgs e)         {                   DeploymentCatalog deploymentCatalog =     new DeploymentCatalog("ExternalSilverlightApplication.xap");                   CompositionHost.Initialize(deploymentCatalog);                   deploymentCatalog.DownloadCompleted += (s, i) =>                 {                     if (i.Error == null)                     {                         CompositionInitializer.SatisfyImports(this);                           LeftContent.Child = LeftUserControl;                         RightContent.Child = RightUserControl;                         LoaderButton.IsEnabled = false;                     }                 };                   deploymentCatalog.DownloadAsync();         } This is where the magic happens!  The deploymentCatalog object is pointed to the ExternalSilverlightApplication.xap file.  It is then associated with the CompositionHost initialization.  As the download will be asynchronous, an eventhandler is created for the DownloadCompleted event.  The deploymentCatalog object is then told to start the asynchronous download. The event handler that executes when the download is completed uses the CompositionInitializer.SatisfyImports() function to tell MEF to satisfy the Imports for the current class.  It is at this point that the LeftUserControl and RightUserControl properties are initialized with composed objects from the downloaded ExternalSilverlightApplication.xap package. 18.   Run the application click the Download External Controls button and see the controls defined in the ExternalSilverlightApplication application loaded into the original Silverlight application. Congratulations!  You have implemented download on demand capabilities for composite applications using the MEF DeploymentCatalog class.  You are now able to segment your applications into separate xap file for deployment.

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• Does Test Driven Development (TDD) improve Quality and Correctness? (Part 1)

  - by David V. Corbin

  Since the dawn of the computer age, various methodologies have been introduced to improve quality and reduce cost. In this posting, I will by sharing my experiences with Test Driven Development; both its benefits and limitations. To start this topic, we need to agree on what TDD is. The first is to define each of the three words as used in this context. Test - An item or action which measures something in some quantifiable form. Driven - The primary motivation or focus of a series of activities (process) Development - All phases of a software project/product from concept through delivery. The above are very simple definitions that result in the following: "TDD is a process where the primary focus is on measuring and quantifying all aspects of the creation of a (software) product." There are many places where TDD is used outside of software development, even though it is not known by this name. Consider the (conventional) education process that most of us grew up on. The focus was to get the best grades as measured by different tests. Many of these tests measured rote memorization and not understanding of the subject matter. The result of this that many people graduated with high scores but without "quality and correctness" in their ability to utilize the subject matter (of course, the flip side is true where certain people DID understand the material but were not very good at taking this type of test). Returning to software development, let us look at some common scenarios. While these items are generally applicable regardless of platform, language and tools; the remainder of this post will utilize Microsoft Visual Studio and Team Foundation Server (TFS) for examples. It should be realized that everyone does at least some aspect of TDD. At the most rudimentary level, getting a program to compile involves a "pass/fail" measurement (is the syntax valid) that drives their ability to proceed further (run the program). Other developers may create "Unit Tests" in the belief that having a test for every method/property of a class and good code coverage is the goal of TDD. These items may be helpful and even important, but really only address a small aspect of the overall effort. To see TDD in a bigger view, lets identify the various activities that are part of the Software Development LifeCycle. These are going to be presented in a Waterfall style for simplicity, but each item also occurs within Iterative methodologies such as Agile/Scrum. the key ones here are: Requirements Gathering Architecture Design Implementation Quality Assurance Can each of these items be subjected to a process which establishes metrics (quantified metrics) that reflect both the quality and correctness of each item? It should be clear that conventional Unit Tests do not apply to all of these items; at best they can verify that a local aspect (e.g. a Class/Method) of implementation matches the (test writers perspective of) the appropriate design document. So what can we do? For each of area, the goal is to create tests that are quantifiable and durable. The ability to quantify the measurements (beyond a simple pass/fail) is critical to tracking progress(eventually measuring the level of success that has been achieved) and for providing clear information on what items need to be addressed (along with the appropriate time to address them - in varying levels of detail) . Durability is important so that the test can be reapplied (ideally in an automated fashion) over the entire cycle. Returning for a moment back to our "education example", one must also be careful of how the tests are organized and how the measurements are taken. If a test is in a multiple choice format, there is a significant statistical probability that a correct answer might be the result of a random guess. Also, in many situations, having the student simply provide a final answer can obscure many important elements. For example, on a math test, having the student simply provide a numeric answer (rather than showing the methodology) may result in a complete mismatch between the process and the result. It is hard to determine which is worse: The student who makes a simple arithmetric error at one step of a long process (resulting in a wrong answer) or The student who (without providing the "workflow") uses a completely invalid approach, yet still comes up with the right number. The "Wrong Process"/"Right Answer" is probably the single biggest problem in software development. Even very simple items can suffer from this. As an example consider the following code for a "straight line" calculation....Is it correct? (for Integral Points)         int Solve(int m, int b, int x) { return m * x + b; }   Most people would respond "Yes". But let's take the question one step further... Is it correct for all possible values of m,b,x??? (no fair if you cheated by being focused on the bolded text!)  Without additional information regarding constrains on "the possible values of m,b,x" the answer must be NO, there is the risk of overflow/wraparound that will produce an incorrect result! To properly answer this question (i.e. Test the Code), one MUST be able to backtrack from the implementation through the design, and architecture all the way back to the requirements. And the requirement itself must be tested against the stakeholder(s). It is only when the bounding conditions are defined that it is possible to determine if the code is "Correct" and has "Quality". Yet, how many of us (myself included) have written such code without even thinking about it. In many canses we (think we) "know" what the bounds are, and that the code will be correct. As we all know, requirements change, "code reuse" causes implementations to be applied to different scenarios, etc. This leads directly to the types of system failures that plague so many projects. This approach to TDD is much more holistic than ones which start by focusing on the details. The fundamental concepts still apply: Each item should be tested. The test should be defined/implemented before (or concurrent with) the definition/implementation of the actual item. We also add concepts that expand the scope and alter the style by recognizing: There are many things beside "lines of code" that benefit from testing (measuring/evaluating in a formal way) Correctness and Quality can not be solely measured by "correct results" In the future parts, we will examine in greater detail some of the techniques that can be applied to each of these areas....

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• Oracle Application Express (APEX) - Slides & Webcast replay

  - by Alex Blyth

  G'day everyone Thanks to those who attended yesterdays webcast on Oracle Application Express (APEX). A big thanks to Andrew Clarke for presenting on of Oracle's best kept secrets. You can download the slides here and the replay here.4. Oracle Application Express (APEX)View more presentations from Oracle Australia. Next time, Yasin Mohammed will talk to us about all things "Flashback". Details about this session will be posted in the next day or so. Regards Alex

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• Language Club

  - by Ben Griswold

  We started a language club at work this week.  Thus far, we have a collective interest in a number of languages: Python, Ruby, F#, Erlang, Objective-C, Scala, Clojure, Haskell and Go. There are more but these 9 received the most votes. During the first few meetings we are going to determine which language we should tackle first. To help make our selection, each member will provide a quick overview of their favored language by answering the following set of questions: Why are you interested in learning “your” language(s). (There’s lots of work, I’m an MS shill, It’s hip and  fun, etc) What type of language is it?  (OO, dynamic, functional, procedural, declarative, etc) What types of problems is your language best suited to solve?  (Algorithms over big data, rapid application development, modeling, merely academic, etc) Can you provide examples of where/how it is being used?  If it isn’t being used, why not?  (Erlang was invented at Ericsson to provide an extremely fault tolerant, concurrent system.) Quick history – Who created/sponsored the language?  When was it created?  Is it currently active? Does the language have hardware support (an attempt was made at one point to create processor instruction sets specific to Prolog), or can it run as an interpreted language inside another language (like Ruby in the JVM)? Are there facilities for programs written in this language to communicate with other languages?  How does this affect its utility? Does the language have a IDE tool support?  (Think Eclipse or Visual Studio) How well is the language supported in terms of books, community and documentation? What’s the number one things which differentiates the language from others?  (i.e. Why is it cool?) How is the language applicability to us as consultants?  What would the impact be of using the language in terms of cost, maintainability, personnel costs, etc.? What’s the number one things which differentiates the language from others?  (i.e. Why is it cool?) This should provide an decent introduction into nearly a dozen languages and give us enough context to decide which single language deserves our undivided attention for the weeks to come.  Stay tuned for the winner…

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• Partner Webcast – Oracle Coherence Applications on WebLogic 12c Grid - 21st Nov 2013

  - by Thanos Terentes Printzios

  Oracle Coherence is the industry leading in-memory data grid solution that enables organizations to predictably scale mission-critical applications by providing fast access to frequently used data. As data volumes and customer expectations increase, driven by the “internet of things”, social, mobile, cloud and always-connected devices, so does the need to handle more data in real-time, offload over-burdened shared data services and provide availability guarantees. The latest release of Oracle Coherence 12c comes with great improvements in ease of use, integration and RASP (Reliability, Availability, Scalability, and Performance) areas. In addition it features an innovating approach to build and deploy Coherence Application as an integral part of typical JEE Enterprise Application. Coherence GAR archives and Coherence Managed Servers are now first-class citizens of all JEE applications and Oracle WebLogic domains respectively. That enables even easier development, deployment and management of complex multi-tier enterprise applications powered by data grid rich features. Oracle Coherence 12c makes your solution ready for the future of big data and always-on-line world. This webcast is focused on demonstrating How to create a Coherence Application using Oracle Enterprise Pack for Eclipse 12.1.2.1.1 (Kepler release). How to package the application in form of GAR archive inside the EAR deployable application. How to deploy the application to multi-tier WebLogic clusters. How to define and configure the WebLogic domain for the tiered clusters hosting both data grid and client JEE applications.  Finally we will expose the data in grid to external systems using REST services and create a simple web interface to the underlying data using Oracle ADF Faces components. Join us on this technology webcast, to find out more about how Oracle Cloud Application Frameworks brings together the key industry leading technologies of Oracle Coherence and Weblogic 12c, delivering next-generation applications. Agenda: Introduction to Oracle Coherence What's new in 12c release POF annotations Live Events Elastic Data (Flash storage support) Managed Coherence Servers for Oracle WebLogic Coherence Applications (Grid Archive) Live Demonstration Creating and configuring Coherence Servers forming the data tier cluster Creating a simple Coherence Grid Application in Eclipse Adding REST support and creating simple ADF Faces client application Deploying the grid and client applications to separate tiers in WebLogic topology HA capabilities of the data tier 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. Duration: 1 hour REGISTER NOW For any questions please contact us at partner.imc-AT-beehiveonline.oracle-DOT-com Stay Connected Oracle Newsletters

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• Organic SEO Marketing is an Effective, Yet Affordable Search Engine Marketing Solution

  There are several SEO techniques known to veteran of the field, of which organic SEO is the latest and the most effective. Let us explore organic SEO in this article.

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• Using Entity Framework Entity splitting customisations in an ASP.Net application

  - by nikolaosk

  I have been teaching in the past few weeks many people on how to use Entity Framework. I have decided to provide some of the samples I am using in my classes. First let’s try to define what EF is and why it is going to help us to create easily data-centric applications.Entity Framework is an object-relational mapping (ORM) framework for the .NET Framework.EF addresses the problem of Object-relational impedance mismatch . I will not be talking about that mismatch because it is well documented in many...(read more)

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