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  • Computer / Software Engineering vs Other Engineering Disciplines [closed]

    - by Mohammad Yaseen
    Since this was a rather specific question, I have tried my best to present this question in a format which fits the style of this site. Please comment if it can be improved further. I have to choose the Engineering discipline on 6th Nov. My interest is in Robotics, hardware-level programming, Artificial Intelligence and back-end programming. I am currently working as a freelance developer using mainly PHP and occasionally working with GWT.I am somewhat familiar with C# and Python too. I am not super good at programming but I do like it. I am thinking to choose Computer and Information Systems Engineering as this is what I love but all the eggheads of my city are going to Mechanical Engineering and when I ask one of them Why are you choosing this? They say It's my interest and for job and the money. Basically I am confused between CIS and Mechanical Engineering, specifically the job market for both. Since this is a programmers' site I think following questions will be relevant . I am asking this because I want to take advice from professionals in this field before diving too deep . Are you happy with your job / work and pay. Are you satisfied with the work environment and career growth Do you feel OK (or great?) about the near and/or distant future of your industry. Why should a person choose Computer if he has other choices i.e what this industry has to offer in particular which other fields of work don't This industry is subject to rapid changes and you have to learn continuously throughout your entire career. Does this learning and constant hard work pay off ? In my country there is no hardware manufacturing. So most of CIS graduates (like Software Engineers) work in Software Houses. What is the scenario in your country. Is a degree titled 'Software' necessary or companies will take Computer Engineers too if they have relevant experience. I am asking this because I plan to move abroad for work. This is going to be something which I'll do for the rest of my life so I am a bit confused about the right choice. You can view the course outline for both programmes below. Computer and Information Systems Engineering. Mechanical Engineering

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  • Google Chrome Extensions: Identity, Signing and Auto Update

    Google Chrome Extensions: Identity, Signing and Auto Update Antony Sargent, a software engineer at Google discusses topics related to ids, packaging and distribution of extensions in the Google Chrome Extension system. To get more information, visit code.google.com/chrome/extensions From: GoogleDevelopers Views: 27337 54 ratings Time: 04:08 More in Science & Technology

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  • CI Deployment Of Azure Web Roles Using TeamCity

    - by srkirkland
    After recently migrating an important new website to use Windows Azure “Web Roles” I wanted an easier way to deploy new versions to the Azure Staging environment as well as a reliable process to rollback deployments to a certain “known good” source control commit checkpoint.  By configuring our JetBrains’ TeamCity CI server to utilize Windows Azure PowerShell cmdlets to create new automated deployments, I’ll show you how to take control of your Azure publish process. Step 0: Configuring your Azure Project in Visual Studio Before we can start looking at automating the deployment, we should make sure manual deployments from Visual Studio are working properly.  Detailed information for setting up deployments can be found at http://msdn.microsoft.com/en-us/library/windowsazure/ff683672.aspx#PublishAzure or by doing some quick Googling, but the basics are as follows: Install the prerequisite Windows Azure SDK Create an Azure project by right-clicking on your web project and choosing “Add Windows Azure Cloud Service Project” (or by manually adding that project type) Configure your Role and Service Configuration/Definition as desired Right-click on your azure project and choose “Publish,” create a publish profile, and push to your web role You don’t actually have to do step #4 and create a publish profile, but it’s a good exercise to make sure everything is working properly.  Once your Windows Azure project is setup correctly, we are ready to move on to understanding the Azure Publish process. Understanding the Azure Publish Process The actual Windows Azure project is fairly simple at its core—it builds your dependent roles (in our case, a web role) against a specific service and build configuration, and outputs two files: ServiceConfiguration.Cloud.cscfg: This is just the file containing your package configuration info, for example Instance Count, OsFamily, ConnectionString and other Setting information. ProjectName.Azure.cspkg: This is the package file that contains the guts of your deployment, including all deployable files. When you package your Azure project, these two files will be created within the directory ./[ProjectName].Azure/bin/[ConfigName]/app.publish/.  If you want to build your Azure Project from the command line, it’s as simple as calling MSBuild on the “Publish” target: msbuild.exe /target:Publish Windows Azure PowerShell Cmdlets The last pieces of the puzzle that make CI automation possible are the Azure PowerShell Cmdlets (http://msdn.microsoft.com/en-us/library/windowsazure/jj156055.aspx).  These cmdlets are what will let us create deployments without Visual Studio or other user intervention. Preparing TeamCity for Azure Deployments Now we are ready to get our TeamCity server setup so it can build and deploy Windows Azure projects, which we now know requires the Azure SDK and the Windows Azure PowerShell Cmdlets. Installing the Azure SDK is easy enough, just go to https://www.windowsazure.com/en-us/develop/net/ and click “Install” Once this SDK is installed, I recommend running a test build to make sure your project is building correctly.  You’ll want to setup your build step using MSBuild with the “Publish” target against your solution file.  Mine looks like this: Assuming the build was successful, you will now have the two *.cspkg and *cscfg files within your build directory.  If the build was red (failed), take a look at the build logs and keep an eye out for “unsupported project type” or other build errors, which will need to be addressed before the CI deployment can be completed. With a successful build we are now ready to install and configure the Windows Azure PowerShell Cmdlets: Follow the instructions at http://msdn.microsoft.com/en-us/library/windowsazure/jj554332 to install the Cmdlets and configure PowerShell After installing the Cmdlets, you’ll need to get your Azure Subscription Info using the Get-AzurePublishSettingsFile command. Store the resulting *.publishsettings file somewhere you can get to easily, like C:\TeamCity, because you will need to reference it later from your deploy script. Scripting the CI Deploy Process Now that the cmdlets are installed on our TeamCity server, we are ready to script the actual deployment using a TeamCity “PowerShell” build runner.  Before we look at any code, here’s a breakdown of our deployment algorithm: Setup your variables, including the location of the *.cspkg and *cscfg files produced in the earlier MSBuild step (remember, the folder is something like [ProjectName].Azure/bin/[ConfigName]/app.publish/ Import the Windows Azure PowerShell Cmdlets Import and set your Azure Subscription information (this is basically your authentication/authorization step, so protect your settings file Now look for a current deployment, and if you find one Upgrade it, else Create a new deployment Pretty simple and straightforward.  Now let’s look at the code (also available as a gist here: https://gist.github.com/3694398): $subscription = "[Your Subscription Name]" $service = "[Your Azure Service Name]" $slot = "staging" #staging or production $package = "[ProjectName]\bin\[BuildConfigName]\app.publish\[ProjectName].cspkg" $configuration = "[ProjectName]\bin\[BuildConfigName]\app.publish\ServiceConfiguration.Cloud.cscfg" $timeStampFormat = "g" $deploymentLabel = "ContinuousDeploy to $service v%build.number%"   Write-Output "Running Azure Imports" Import-Module "C:\Program Files (x86)\Microsoft SDKs\Windows Azure\PowerShell\Azure\*.psd1" Import-AzurePublishSettingsFile "C:\TeamCity\[PSFileName].publishsettings" Set-AzureSubscription -CurrentStorageAccount $service -SubscriptionName $subscription   function Publish(){ $deployment = Get-AzureDeployment -ServiceName $service -Slot $slot -ErrorVariable a -ErrorAction silentlycontinue   if ($a[0] -ne $null) { Write-Output "$(Get-Date -f $timeStampFormat) - No deployment is detected. Creating a new deployment. " } if ($deployment.Name -ne $null) { #Update deployment inplace (usually faster, cheaper, won't destroy VIP) Write-Output "$(Get-Date -f $timeStampFormat) - Deployment exists in $servicename. Upgrading deployment." UpgradeDeployment } else { CreateNewDeployment } }   function CreateNewDeployment() { write-progress -id 3 -activity "Creating New Deployment" -Status "In progress" Write-Output "$(Get-Date -f $timeStampFormat) - Creating New Deployment: In progress"   $opstat = New-AzureDeployment -Slot $slot -Package $package -Configuration $configuration -label $deploymentLabel -ServiceName $service   $completeDeployment = Get-AzureDeployment -ServiceName $service -Slot $slot $completeDeploymentID = $completeDeployment.deploymentid   write-progress -id 3 -activity "Creating New Deployment" -completed -Status "Complete" Write-Output "$(Get-Date -f $timeStampFormat) - Creating New Deployment: Complete, Deployment ID: $completeDeploymentID" }   function UpgradeDeployment() { write-progress -id 3 -activity "Upgrading Deployment" -Status "In progress" Write-Output "$(Get-Date -f $timeStampFormat) - Upgrading Deployment: In progress"   # perform Update-Deployment $setdeployment = Set-AzureDeployment -Upgrade -Slot $slot -Package $package -Configuration $configuration -label $deploymentLabel -ServiceName $service -Force   $completeDeployment = Get-AzureDeployment -ServiceName $service -Slot $slot $completeDeploymentID = $completeDeployment.deploymentid   write-progress -id 3 -activity "Upgrading Deployment" -completed -Status "Complete" Write-Output "$(Get-Date -f $timeStampFormat) - Upgrading Deployment: Complete, Deployment ID: $completeDeploymentID" }   Write-Output "Create Azure Deployment" Publish   Creating the TeamCity Build Step The only thing left is to create a second build step, after your MSBuild “Publish” step, with the build runner type “PowerShell”.  Then set your script to “Source Code,” the script execution mode to “Put script into PowerShell stdin with “-Command” arguments” and then copy/paste in the above script (replacing the placeholder sections with your values).  This should look like the following:   Wrap Up After combining the MSBuild /target:Publish step (which creates the necessary Windows Azure *.cspkg and *.cscfg files) and a PowerShell script step which utilizes the Azure PowerShell Cmdlets, we have a fully deployable build configuration in TeamCity.  You can configure this step to run whenever you’d like using build triggers – for example, you could even deploy whenever a new master branch deploy comes in and passes all required tests. In the script I’ve hardcoded that every deployment goes to the Staging environment on Azure, but you could deploy straight to Production if you want to, or even setup a deployment configuration variable and set it as desired. After your TeamCity Build Configuration is complete, you’ll see something that looks like this: Whenever you click the “Run” button, all of your code will be compiled, published, and deployed to Windows Azure! One additional enormous benefit of automating the process this way is that you can easily deploy any specific source control changeset by clicking the little ellipsis button next to "Run.”  This will bring up a dialog like the one below, where you can select the last change to use for your deployment.  Since Azure Web Role deployments don’t have any rollback functionality, this is a critical feature.   Enjoy!

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  • Win a place at a SQL Server Masterclass with Kimberly Tripp and Paul Randal... 4 days left

    - by Testas
    Only 4 days left to win a chance to see Paul and Kimberly's  Send a email to [email protected] with Master class in the subject line for an opportunity to win a free ticket to this event   and if you do not win.....  You can also register for the seminar yourself at: www.regonline.co.uk/kimtrippsql  More information about the seminar   Where: Radisson Edwardian Heathrow Hotel, London When: Thursday 17th June 2010

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  • SharePoint MVP Chat &ndash; tomorrow and day after

    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). This feed URL has been discontinued. Please update your reader's URL to : http://feeds.feedburner.com/winsmarts Read full article .... ...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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  • Exciting New Job Announcement!

    - by John Blumenauer
    I’m extremely excited to announce that I’ve accepted a position with Applied Information Sciences (AIS).  The innovative work and company values at AIS are aligned with what I was seeking in my next position.  Also, over the past year or so, I’ve met some really talented individuals who work at AIS, so when the opportunity presented itself, I decided it was time to make a change. I look forward to the challenges ahead and working with a team of highly talented and motivated individuals.

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  • Unable to update/ install any files [closed]

    - by Surya
    Possible Duplicate: “Problem with MergeList” error when trying to do an update Just now I installed ubuntu 12.04 on my Lenovo G570 laptop. First I got an error at the time of installation (don't know about it) and I restarted the system and next time, it went well. So, after installing problems started.. There was a error with "Language recognition" and I tried to fix it but didn't work. I tried to install powerTop to check the status of power management. at terminal: sudo apt-get install powertop This is the error I got surya@surya-Lenovo-G570:~$ sudo apt-get powertop install [sudo] password for surya: E: Invalid operation powertop surya@surya-Lenovo-G570:~$ sudo apt-get install powertop Reading package lists... Error! E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages E: The package lists or status file could not be parsed or opened. surya@surya-Lenovo-G570:~$ ^C surya@surya-Lenovo-G570:~$ ^C surya@surya-Lenovo-G570:~$ ^C surya@surya-Lenovo-G570:~$ I downloaded Google Chrome .deb one and tried to install but its not working. Software center is opened and its not loading. There was a notification on the status bar which says: An error occurred please run the package manager from the right-click menu ... .... ... E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages "Copy & Paste" from terminal is not really working... When I press Ctrl + C; its showing ^C on terminal but its not working.. The most important error: I am unable to see a "chip" icon on the status bar so as to install proprietary drivers for my ATI drivers... The interesting part is, powertop worked will on live cd and it even detected my ATI card. Update When I opened "Software Up to Date", this showed a error: Could not initialize the package information An unresolvable problem occurred while initializing the package information. Please report this bug against the 'update-manager' package and include the following error message: 'E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages, E:The package lists or status file could not be parsed or opened.' : My laptop details Lenovo G570; Intel 2nd Gen i5 processor 4GB DDR3 RAM Intel in-build graphics + AMD Radeon HD 6370M 1GB graphics. I need help ASAP.

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  • Try a sample: Using the counter predicate for event sampling

    - by extended_events
    Extended Events offers a rich filtering mechanism, called predicates, that allows you to reduce the number of events you collect by specifying criteria that will be applied during event collection. (You can find more information about predicates in Using SQL Server 2008 Extended Events (by Jonathan Kehayias)) By evaluating predicates early in the event firing sequence we can reduce the performance impact of collecting events by stopping event collection when the criteria are not met. You can specify predicates on both event fields and on a special object called a predicate source. Predicate sources are similar to action in that they typically are related to some type of global information available from the server. You will find that many of the actions available in Extended Events have equivalent predicate sources, but actions and predicates sources are not the same thing. Applying predicates, whether on a field or predicate source, is very similar to what you are used to in T-SQL in terms of how they work; you pick some field/source and compare it to a value, for example, session_id = 52. There is one predicate source that merits special attention though, not just for its special use, but for how the order of predicate evaluation impacts the behavior you see. I’m referring to the counter predicate source. The counter predicate source gives you a way to sample a subset of events that otherwise meet the criteria of the predicate; for example you could collect every other event, or only every tenth event. Simple CountingThe counter predicate source works by creating an in memory counter that increments every time the predicate statement is evaluated. Here is a simple example with my favorite event, sql_statement_completed, that only collects the second statement that is run. (OK, that’s not much of a sample, but this is for demonstration purposes. Here is the session definition: CREATE EVENT SESSION counter_test ON SERVERADD EVENT sqlserver.sql_statement_completed    (ACTION (sqlserver.sql_text)    WHERE package0.counter = 2)ADD TARGET package0.ring_bufferWITH (MAX_DISPATCH_LATENCY = 1 SECONDS) You can find general information about the session DDL syntax in BOL and from Pedro’s post Introduction to Extended Events. The important part here is the WHERE statement that defines that I only what the event where package0.count = 2; in other words, only the second instance of the event. Notice that I need to provide the package name along with the predicate source. You don’t need to provide the package name if you’re using event fields, only for predicate sources. Let’s say I run the following test queries: -- Run three statements to test the sessionSELECT 'This is the first statement'GOSELECT 'This is the second statement'GOSELECT 'This is the third statement';GO Once you return the event data from the ring buffer and parse the XML (see my earlier post on reading event data) you should see something like this: event_name sql_text sql_statement_completed SELECT ‘This is the second statement’ You can see that only the second statement from the test was actually collected. (Feel free to try this yourself. Check out what happens if you remove the WHERE statement from your session. Go ahead, I’ll wait.) Percentage Sampling OK, so that wasn’t particularly interesting, but you can probably see that this could be interesting, for example, lets say I need a 25% sample of the statements executed on my server for some type of QA analysis, that might be more interesting than just the second statement. All comparisons of predicates are handled using an object called a predicate comparator; the simple comparisons such as equals, greater than, etc. are mapped to the common mathematical symbols you know and love (eg. = and >), but to do the less common comparisons you will need to use the predicate comparators directly. You would probably look to the MOD operation to do this type sampling; we would too, but we don’t call it MOD, we call it divides_by_uint64. This comparator evaluates whether one number is divisible by another with no remainder. The general syntax for using a predicate comparator is pred_comp(field, value), field is always first and value is always second. So lets take a look at how the session changes to answer our new question of 25% sampling: CREATE EVENT SESSION counter_test_25 ON SERVERADD EVENT sqlserver.sql_statement_completed    (ACTION (sqlserver.sql_text)    WHERE package0.divides_by_uint64(package0.counter,4))ADD TARGET package0.ring_bufferWITH (MAX_DISPATCH_LATENCY = 1 SECONDS)GO Here I’ve replaced the simple equivalency check with the divides_by_uint64 comparator to check if the counter is evenly divisible by 4, which gives us back every fourth record. I’ll leave it as an exercise for the reader to test this session. Why order matters I indicated at the start of this post that order matters when it comes to the counter predicate – it does. Like most other predicate systems, Extended Events evaluates the predicate statement from left to right; as soon as the predicate statement is proven false we abandon evaluation of the remainder of the statement. The counter predicate source is only incremented when it is evaluated so whether or not the counter is incremented will depend on where it is in the predicate statement and whether a previous criteria made the predicate false or not. Here is a generic example: Pred1: (WHERE statement_1 AND package0.counter = 2)Pred2: (WHERE package0.counter = 2 AND statement_1) Let’s say I cause a number of events as follows and examine what happens to the counter predicate source. Iteration Statement Pred1 Counter Pred2 Counter A Not statement_1 0 1 B statement_1 1 2 C Not statement_1 1 3 D statement_1 2 4 As you can see, in the case of Pred1, statement_1 is evaluated first, when it fails (A & C) predicate evaluation is stopped and the counter is not incremented. With Pred2 the counter is evaluated first, so it is incremented on every iteration of the event and the remaining parts of the predicate are then evaluated. In this example, Pred1 would return an event for D while Pred2 would return an event for B. But wait, there is an interesting side-effect here; consider Pred2 if I had run my statements in the following order: Not statement_1 Not statement_1 statement_1 statement_1 In this case I would never get an event back from the system because the point at which counter=2, the rest of the predicate evaluates as false so the event is not returned. If you’re using the counter target for sampling and you’re not getting the expected events, or any events, check the order of the predicate criteria. As a general rule I’d suggest that the counter criteria should be the last element of your predicate statement since that will assure that your sampling rate will apply to the set of event records defined by the rest of your predicate. Aside: I’m interested in hearing about uses for putting the counter predicate criteria earlier in the predicate statement. If you have one, post it in a comment to share with the class. - Mike Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Oracle WebCenter @ OpenWorld 2012

    - by kellsey.ruppel
    This week, we want to focus on giving our blog readers a preview of Oracle WebCenter related events and activities happening at Oracle OpenWorld this year! Today's guest post comes from Jamie Rancourt, Senior Manager of Product Management for Oracle WebCenter. Are you registered to attend OpenWorld 2012 in San Francisco from September 30 – October 4?  If not, the conference details and registration information can be found at http://oracle.com/openworld!  Here’s a brief run down of the planned activities for Oracle WebCenter at this year’s event. WebCenter Sessions This year WebCenter will be featured in 36 sessions across the following tracks: Web Experience Management, Portals, Content Management and Social Network Middleware for Enterprise Applications Financial Management Oracle ADF and Fusion Application Development Applications Tools and Technology Applications Strategy Life Sciences Customer Relationship Management Oracle RightNow CX Cloud Service Siebel Applications SOA and Business Process Management Oracle Fusion Applications Oracle Commerce Retail Social Business Cloud Computing Here are a few of the sessions to wet your appetite: Oracle WebCenter Strategy: Engaging your Customers.  Empowering your Business Oracle WebCenter Sites Strategy & Vision Oracle WebCenter Content Strategy & Vision Oracle WebCenter Portal Strategy & Vision Oracle Social Network Strategy & Vision Develop a Mobile Strategy with Oracle WebCenter: Engage Customers, Employees, and Partners Oracle WebCenter’s Cloud Strategy: From Social and Platform Services to Mash-ups We also have 4 interactive customer panels planned for the event: Using Web Experience Management to Drive Online Marketing Success Land Mines, Potholes, and Dirt Roads: Navigating the Way to ECM Nirvana Becoming a Social Business: Stories from the Front Lines of Change Building Next-Generation Portals: An Interactive Customer Panel Discussion And there are many more sessions for you to attend to learn everything there is to know about Oracle WebCenter from our product experts and partners. Make sure to visit the Content Catalog for the complete session details Labs and Demos This year’s event also features 4 WebCenter hands on labs, each focusing on a different product area including Portal, Content, Sites and Social Network.  In addition to the labs, there will be 6 demos featuring Oracle WebCenter in both the Fusion Middleware and Cloud pavilions.  Make sure you stop by to see the latest demos and meet our knowledgeable product managers! And don't forget about the Oracle WebCenter Customer Appreciation Event, which is sponsored by our Partners and will take place on Tuesday, October 2nd at The Palace Hotel. Be sure to watch the blog for more information in the coming months with how to register! We look forward to seeing you at Oracle OpenWorld 2012!

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  • Demystified - BI in SharePoint 2010

    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). This feed URL has been discontinued. Please update your reader's URL to : http://feeds.feedburner.com/winsmarts Read full article .... ...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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  • Migrating an LDOM from a T4 to a T5

    - by Owen Allen
    I got a question about LDoms: "Is there any restriction against migrating LDoms between the T4 and T5 platforms?" The only restriction is that, at present, you can't do a live migration. However, with Ops Center 12.1.4, you can put T4 and T5s together in a Server Pool and either manually migrate the LDoms to a new host or configure them for automated cold-migration failover. Take a look at the Server Pool and Oracle VM Server for SPARC chapters for more information.

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  • Silverlight Cream for May 22, 2010 -- #867

    - by Dave Campbell
    In this Issue: Michael Washington, Xianzhong Zhu, Jim Lynn, Laurent Bugnion, and Kyle McClellan. A ton of Shoutouts this time: Cigdem Patlak (CrocusGirl) is interviewed about Silverlight 4 on Channel 9: Silverlight discussion with Cigdem Patlak Timmy Kokke has material up from a presentation he did, and check out the SilverAmp project he's got going: Code & Slides – SDE – What’s new in Silverlight 4 Graham Odds at ScottLogic has an interesting post up: Contextual cues in user interface design Einar Ingebrigtsen is discussing Balder licensing and is asking for input: Balder - Licensing SilverLaw has updated two of his stylings at the Expression Gallery to Silverlight 4: ChildWindow and Accordion Styling Silverlight 4 Keep this page bookmarked -- it's the only page you'll need for Silverlight and Expression links.. well, that and my blog :) .. from Adam Kinney: Silverlight and Expression Blend Jeremy Boyd and John-Daniel Trask have some sweet-looking controls in their new release: Introducing Silverlight Elements 1.1 Matthias Shapiro entered the Design for America competition with his Recovery Review: A Silverlight Sunlight Foundation Visualization Project be sure to check out his blog post about it -- there's a link at the bottom. Koen Zwikstra announed a new release: Document Toolkit 2 Beta 1 available ... built for SL4 and lots of features -- check out the blog post. From SilverlightCream.com: Simple Example To Secure WCF Data Service OData Methods Michael Washington has a follow-on tutorial up on WCF Data Security with OData -- essentially this is the 'securing the data' part ... the Silverlight part was in the previous post... all code is available. Developing Freecell Game Using Silverlight 3 Part 1 Xianzhong Zhu has the first of a two-part tutorial up on building Freecell in Silverlight 3 ... yeah... SL3 -- oh, can you say WP7?? :) Silverlight Top Tip: Startup page for Navigation Apps Jim Lynn has detailed how to go straight to a specific page you're working on in a complex Silverlight app say for debug purposes rather than page/page/page ... I was just thinking yesterday about putting a shortcut on my taskbar for something similar in .NET :) Handling DataGrid.SelectedItems in an MVVM-friendly manner Laurent Bugnion responded with code to a question about getting a DataGrid's SelectedItems into the ViewModel in MVVMLight. Demo code available too. RIA Services and Windows Live ID Kyle McClellan has a post up discussing using LiveID and RIA Services and Silverlight. Lots of external links sprinkled around. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Grub2 -- Dualboot Ubuntu LTS 12.04 and Windows 7 -- Detects two Windows 7 (loader) entries

    - by DarkIron112
    this is the first question I have ever asked the Ubuntu Community. :D I'm fairly new to Ubuntu, but I understand the basics and know how to navigate the Terminal. I also know how to ask for/research my problems before asking for/ help. I have scoured the internet high and low and learned much of how Grub2 works. But nothing has helped me to solve my problem. My problem is this: I have a computer that has three hard drives. It previously had Windows XP, but I upgraded to Windows 7. I also installed Ubuntu 12.04 LTS (Precise Pangolin). During my installation of Windows 7, there was a failure and I had to restart the installation. Afterwards, I installed Ubuntu. After some trouble removing all traces of the XP OS (Ubuntu auto-detected it, but not Windows 7) I got the two OSes working flawlessly. Or, almost. When booting up, Grub2 used to display Ubuntu, Ubuntu Recovery Mode, Other Versions of Linux, memtest, followed by "Windows 7 (loader) on /dev/sda1" and "Windows 7 (loader) on /dev/sdb1". I eventually removed Recovery Mode, Other Versions, and Memtest. Now, when I run: sudo update-grub I get this print-out: Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.2.0-26-generic Found initrd image: /boot/initrd.img-3.2.0-26-generic Found Windows 7 (loader) on /dev/sda1 Found Windows 7 (loader) on /dev/sdb1 I would like to remove "Windows 7 (loader) on /dev/sda1", as it is a broken entry that shouldn't exist, and must have been installed during my first Windows 7 attempt. I cannot find a Windows 7 entry in /etc/grub.d... And I don't know where to look. Here is a layout of my hard drives: /dev/sda1/ (1.82 TiB), NTFS ("Media") /dev/sdb1/ (100 Mib), NTFS ("System Reserved") /dev/sdb2/ (149 GiB), NTFS ("Windows 7") /dev/sdb3/ (149 GiB), Extended (" ") /dev/sdb4/ (145 GiB), ext4 (" ") /dev/sdb5/ (4 GiB), linux-swap (" ") /dev/sdc1/ (488.28 GiB), NTFS ("Downloads") /dev/sdc2/ (488.28 GiB), NTFS ("AltMedia") /dev/sdc3/ (886.45 GiB), NTFS ("Personal") unallocated (2.09 MiB), unallocated What I think has happened: Windows 7 installed first and badly. I installed it again. First, there was Windows XP to guide where the bootloader went to so it was put on /dev/sdb1/. But, the second time no such guide existed so the machine put another bootloader on /dev/sda1/. sda1, by the way, is the only partition on a 2TB drive. No boot record partition appears to exist according to gedit. I'm not sure where Grub2 is getting this information from. But, there it is. Is there anything somebody can do to help me? Or, is there any more information I should add? Thank you, community!

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  • SQL Developer Debugging, Watches, Smart Data, & Data

    - by thatjeffsmith
    After presenting the SQL Developer PL/SQL debugger for about an hour yesterday at KScope12 in San Antonio, my boss came up and asked, “Now, would you really want to know what the Smart Data panel does?” Apparently I had ‘made up’ my own story about what that panel’s intent is based on my experience with it. Not good Jeff, not good. It was a very small point of my presentation, but I probably should have read the docs. The Smart Data tab displays information about variables, using your Debugger: Smart Data preferences. You can also specify these preferences by right-clicking in the Smart Data window and selecting Preferences. Debugger Smart Data Preferences, control number of variables to display The Smart Data panel auto-inspects the last X accessed variables. So if you have a program with 26 variables, instead of showing you all 26, it will just show you the last two variables that were referenced in your program. If you were to click on the ‘Data’ debug panel, you’ll see EVERYTHING. And if you only want to see a very specific set of values, then you should use Watches. The Smart Data Panel As I step through the code, the variables being tracked change as they are referenced. Only the most recent ones display. This is controlled by the ‘Maximum Locations to Remember’ preference. Step through the code, see the latest variables accessed The Data Panel All variables are displayed. Might be information overload on large PL/SQL programs where you have many dozens or even hundreds of variables to track. Shows everything all the time Watches Watches are added manually and only show what you ask for. Data on Demand – add a watch to track a specific variable Remember, you can interact with your data If you want to do more than just watch, you can mouse-right on a data element, and change the value of the variable as the program is running. This is one of the primary benefits to debugging over using DBMS_OUTPUT to track what’s happening in your program. Change the values while the program is running to test your ‘What if?’ scenarios

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  • Windows Azure Myths

    - by BuckWoody
    Windows Azure is part of the Microsoft "stack" - the suite of software and services we offer. Because we have so many products in almost every part of technology, it's hard to know everything about all parts of what we do - even for those of us who work here. So it's no surprise that some folks are not as familiar with Windows and SQL Azure as they are, say Windows Server or XBox. As I chat with folks about a solution for a business or organization need, I put Windows Azure into the mix. I always start off with "What do you already know about Windows Azure?" so that I don't bore folks with information they already have. I some cases they've checked out the product ahead of time and have specific questions, in others they aren't as familiar, and in still others there is a fair amount of mis-information. Sometimes that's because of a marketing failure, sometimes it's hearsay, and somtetimes it's active misinformation. I thought I might lay out a few of these misconceptions. As always - do your fact-checking! Never take anyone's word alone (including mine) as gospel. Make sure you educate yourself on your options. Your company or your clients depend on you to have the right information on IT, so make sure you live up to that. Myth 1: Nobody uses Windows Azure It's true that we don't give out numbers on the amount of clients on Windows and SQL Azure. But lots of folks are here - companies you may have heard of like Boeing, NASA, Fujitsu, The City of London, Nuedesic, and many others. I deal with firms small and large that use Windows Azure for mission-critical applications, sometimes totally on Windows and/or SQL Azure, sometimes in conjunction with an on-premises system, sometimes for only a specific component in Windows Azure like storage. The interesting thing is that many sites you visit have a Windows Azure component, or are running on Windows Azure. They just don't announce it. Just like the other cloud providers, the companies have asked to be completely branded themselves - they don't want you to be aware or care that they are on Windows Azure. Sometimes that's for security, other times it's for different reasons. It's just like the web sites you visit. For the most part, they don't advertise which OS or Web Server they use. It really just shouldn't matter. The point is that they just use what works to solve a given problem. Check out a few public case studies here: https://www.windowsazure.com/en-us/home/case-studies/ Myth 2: It's only for Microsoft stuff - can't use Open Source This is the one I face the most, and am the most dismayed by. We work just fine with many open source products, including Java, NodeJS, PHP, Ruby, Python, Hadoop, and many other languages and applications. You can quickly deploy a Wordpress, Umbraco and other "kits". We have software development kits (SDK's) for iPhones, iPads, Android, Windows phones and more. We have an SDK to work with FaceBook and other social networks. In short, we play well with others. More on the languages and runtimes we support here: https://www.windowsazure.com/en-us/develop/overview/ More on the SDK's here: http://www.wadewegner.com/2011/05/windows-azure-toolkit-for-ios/, http://www.wadewegner.com/2011/08/windows-azure-toolkits-for-devices-now-with-android/, http://azuretoolkit.codeplex.com/ Myth 3: Microsoft expects me to switch everything to "the cloud" No, we don't. That would be disasterous, unless the only things you run in your company uses works perfectly in Azure. Use Windows Azure  - or any cloud for that matter - where it works. Whenever I talk to companies, I focus on two things: Something that is broken and needs to be re-architected Something you want to do that is new If something is broken, and you need new tools to scale, extend, add capacity dynamically and so on, then you can consider using Windows or SQL Azure. It can help solve problems that you have, or it may include a component you don't want to write or architect yourself. Sometimes you want to do something new, like extend your company's offerings to mobile phones, to the web, or to a social network. More info on where it works here: http://blogs.msdn.com/b/buckwoody/archive/2011/01/18/windows-azure-and-sql-azure-use-cases.aspx Myth 4: I have to write code to use Windows and SQL Azure If Windows Azure is a PaaS - a Platform as a Service - then don't you have to write code to use it? Nope. Windows and SQL Azure are made up of various components. Some of those components allow you to write and deploy code (like Compute) and others don't. We have lots of customers using Windows Azure storage as a backup, to securely share files instead of using DropBox, to distribute videos or code or firmware, and more. Others use our High Performance Computing (HPC) offering to rent a supercomputer when they need one. You can even throw workloads at that using Excel! In addition there are lots of other components in Windows Azure you can use, from the Windows Azure Media Services to others. More here: https://www.windowsazure.com/en-us/home/scenarios/saas/ Myth 5: Windows Azure is just another form of "vendor lock-in" Windows Azure uses .NET, OSS languages and standard interfaces for the code. Sure, you're not going to take the code line-for-line and run it on a mainframe, but it's standard code that you write, and can port to something else. And the data is yours - you can bring it back whever you want. It's either in text or binary form, that you have complete control over. There are no licenses - you can "pay as you go", and when you're done, you can leave the service and take all your code, data and IP with you.   So go out there, read up, try it. Use it where it works. And don't believe everything you hear - sometimes the Internet doesn't get it all correct. :)

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  • 11.2 Upgrade Companion has been updated!

    - by roy.swonger
    The long-awaited update of the 11.2 Upgrade Companion is now available in My Oracle Support, in the usual location (Note 785351.1). This comprehensive update incorporates lessons learned from adoption of the 11.2.0.2 patchset release. We have also included many more links for customers in a RAC/ASM (Grid Infrastructure) environment, information about the GoldenGate 11g release, and more! As always, the Upgrade Companion is available in PDF and HTML format in addition to the web-viewable java-based document.

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  • How can I save my university's Computer Science & Engineering department? [closed]

    - by Blake
    I'm currently pursuing a B.S. in Computer Engineering at the University of Florida, and we're having a bit of a problem right now... The state recently passed a budget plan that cuts funding for higher education in Florida. The dean of UF's College of Engineering decided that the best way for us to absorb the blow is by executing the following plan: All of the Computer Engineering Degree programs, BS, MS and PhD, would be moved from the Computer & Information Science and Engineering Dept. to the Electrical and Computer Engineering Dept. along with most of the advising staff. Roughly half of the faculty would be offered the opportunity to move to Electrical/Computer Eng., Biomedical Eng., or Industrial/Systems Eng. Staff positions in CISE which are currently supporting research and graduate programs would be eliminated. The activities currently covered by TAs would be reassigned to faculty and the TA budget for CISE would be eliminated. Any faculty member who wishes to stay in CISE may do so, but with a revised assignment focused on teaching and advising. In short: our department (at least as we know it) is being decimated. Computer & Information Sciences & Engineering (one of 9 departments in the College of Engineering) is taking more than 50% of the cuts. If you're interested in reading the full proposal, you can access it here. A vast, VAST majority of the students and faculty in the department are vehemently opposed to this plan, however the dean is already taking measures to implement it. This is the only proposal on the table right now, and she has not entertained our requests for alternatives. She sees it as an obvious (albeit drastic) solution to our budget problem, citing that many other universities have combined Computer and Electrical Engineering departments. I'll bet those universities didn't have to eliminate an established department to get there, though. The budget goes into effect July 1, 2012 (this is non-negotiable), and the dean's proposal is currently set to be finalized some time next week. We don't have much time! My question to everyone here is this: Are we overreacting to this plan, or are we justified? And could you explain why or why not? It's obvious that CISE students will resist any cuts to our department, but I'm curious to see what other people in the field have to say. Any feedback is greatly appreciated. I will select the answer that saves our department. Just kidding, I'll pick the one that best explains why this is a good or bad decision for the dean to make. Please note that anything you say can and will be used to further our cause (and we might track you down if you provide a compelling argument against us).

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  • Loading SpriteFont through a different class than Game.cs

    - by MintyAnt
    I am trying to load up a single SpriteFont to print some debug information. In our current game, we load up both Textures and Music through a ResourceManager. They are both loaded with a filestream, and thus do not require Content.Load SoundEffect soundEffect = SoundEffect.FromStream( fs ); Since this ResourceManager does not inherit from Game or is like Game.cs, I cannot use the usual method: SpriteFont spriteFont = Content.Load<SpriteFont>(resource.Key.Item2); Anyone have any idea how I can either: -Load the SpriteFont a different way -Create my own Contentmanager

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  • Integrating Coherence & Java EE 6 Applications using ActiveCache

    - by Ricardo Ferreira
    OK, so you are a developer and are starting a new Java EE 6 application using the most wonderful features of the Java EE platform like Enterprise JavaBeans, JavaServer Faces, CDI, JPA e another cool stuff technologies. And your architecture need to hold piece of data into distributed caches to improve application's performance, scalability and reliability? If this is your current facing scenario, maybe you should look closely in the solutions provided by Oracle WebLogic Server. Oracle had integrated WebLogic Server and its champion data caching technology called Oracle Coherence. This seamless integration between this two products provides a comprehensive environment to develop applications without the complexity of extra Java code to manage cache as a dependency, since Oracle provides an DI ("Dependency Injection") mechanism for Coherence, the same DI mechanism available in standard Java EE applications. This feature is called ActiveCache. In this article, I will show you how to configure ActiveCache in WebLogic and at your Java EE application. Configuring WebLogic to manage Coherence Before you start changing your application to use Coherence, you need to configure your Coherence distributed cache. The good news is, you can manage all this stuff without writing a single line of code of XML or even Java. This configuration can be done entirely in the WebLogic administration console. The first thing to do is the setup of a Coherence cluster. A Coherence cluster is a set of Coherence JVMs configured to form one single view of the cache. This means that you can insert or remove members of the cluster without the client application (the application that generates or consume data from the cache) knows about the changes. This concept allows your solution to scale-out without changing the application server JVMs. You can growth your application only in the data grid layer. To start the configuration, you need to configure an machine that points to the server in which you want to execute the Coherence JVMs. WebLogic Server allows you to do this very easily using the Administration Console. In this example, I will call the machine as "coherence-server". Remember that in order to the machine concept works, you need to ensure that the NodeManager are being executed in the target server that the machine points to. The NodeManager executable can be found in <WLS_HOME>/server/bin/startNodeManager.sh. The next thing to do is to configure a Coherence cluster. In the WebLogic administration console, go to Environment > Coherence Clusters and click in "New". Call this Coherence cluster of "my-coherence-cluster". Click in next. Specify a valid cluster address and port. The Coherence members will communicate with each other through this address and port. Our Coherence cluster are now configured. Now it is time to configure the Coherence members and add them to this cluster. In the WebLogic administration console, go to Environment > Coherence Servers and click in "New". In the field "Name" set to "coh-server-1". In the field "Machine", associate this Coherence server to the machine "coherence-server". In the field "Cluster", associate this Coherence server to the cluster named "my-coherence-cluster". Click in "Finish". Start the Coherence server using the "Control" tab of WebLogic administration console. This will instruct WebLogic to start a new JVM of Coherence in the target machine that should join the pre-defined Coherence cluster. Configuring your Java EE Application to Access Coherence Now lets pass to the funny part of the configuration. The first thing to do is to inform your Java EE application which Coherence cluster to join. Oracle had updated WebLogic server deployment descriptors so you will not have to change your code or the containers deployment descriptors like application.xml, ejb-jar.xml or web.xml. In this example, I will show you how to enable DI ("Dependency Injection") to a Coherence cache from a Servlet 3.0 component. In the WEB-INF/weblogic.xml deployment descriptor, put the following metadata information: <?xml version="1.0" encoding="UTF-8"?> <wls:weblogic-web-app xmlns:wls="http://xmlns.oracle.com/weblogic/weblogic-web-app" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd http://xmlns.oracle.com/weblogic/weblogic-web-app http://xmlns.oracle.com/weblogic/weblogic-web-app/1.4/weblogic-web-app.xsd"> <wls:context-root>myWebApp</wls:context-root> <wls:coherence-cluster-ref> <wls:coherence-cluster-name>my-coherence-cluster</wls:coherence-cluster-name> </wls:coherence-cluster-ref> </wls:weblogic-web-app> As you can see, using the "coherence-cluster-name" tag, we are informing our Java EE application that it should join the "my-coherence-cluster" when it loads in the web container. Without this information, the application will not be able to access the predefined Coherence cluster. It will form its own Coherence cluster without any members. So never forget to put this information. Now put the coherence.jar and active-cache-1.0.jar dependencies at your WEB-INF/lib application classpath. You need to deploy this dependencies so ActiveCache can automatically take care of the Coherence cluster join phase. This dependencies can be found in the following locations: - <WLS_HOME>/common/deployable-libraries/active-cache-1.0.jar - <COHERENCE_HOME>/lib/coherence.jar Finally, you need to write down the access code to the Coherence cache at your Servlet. In the following example, we have a Servlet 3.0 component that access a Coherence cache named "transactions" and prints into the browser output the content (the ammount property) of one specific transaction. package com.oracle.coherence.demo.activecache; import java.io.IOException; import javax.annotation.Resource; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.tangosol.net.NamedCache; @WebServlet("/demo/specificTransaction") public class TransactionServletExample extends HttpServlet { @Resource(mappedName = "transactions") NamedCache transactions; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int transId = Integer.parseInt(request.getParameter("transId")); Transaction transaction = (Transaction) transactions.get(transId); response.getWriter().println("<center>" + transaction.getAmmount() + "</center>"); } } Thats it! No more configuration is necessary and you have all set to start producing and getting data to/from Coherence. As you can see in the example code, the Coherence cache are treated as a normal dependency in the Java EE container. The magic happens behind the scenes when the ActiveCache allows your application to join the defined Coherence cluster. The most interesting thing about this approach is, no matter which type of Coherence cache your are using (Distributed, Partitioned, Replicated, WAN-Remote) for the client application, it is just a simple attribute member of com.tangosol.net.NamedCache type. And its all managed by the Java EE container as an dependency. This means that if you inject the same dependency (the Coherence cache named "transactions") in another Java EE component (JSF managed-bean, Stateless EJB) the cache will be the same. Cool isn't it? Thanks to the CDI technology, we can extend the same support for non-Java EE standards components like simple POJOs. This means that you are not forced to only use Servlets, EJBs or JSF in order to inject Coherence caches. You can do the same approach for regular POJOs created for you and managed by lightweight containers like Spring or Seam.

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  • What should you leave behind for your successors?

    - by SnOrfus
    Assume that you're a sole developer leaving a job. What kind of information/material, outside of the code itself, should you create and leave behind for your replacement? An obvious answer is "whatever you would want at a new job" for sure, but it's been a while since I started a new job, and I forget what the most important things that I needed were back then. I'm thinking: accounts/passwords location of equpiment What else?

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  • An XEvent a Day (31 of 31) – Event Session DDL Events

    - by Jonathan Kehayias
    To close out this month’s series on Extended Events we’ll look at the DDL Events for the Event Session DDL operations, and how those can be used to track changes to Event Sessions and determine all of the possible outputs that could exist from an Extended Event Session.  One of my least favorite quirks about Extended Events is that there is no way to determine the Events and Actions that may exist inside a Target, except to parse all of the the captured data.  Information about the Event...(read more)

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  • Security updates for all supported versions of SQL Server

    - by AaronBertrand
    It's patch Tuesday! [ UPDATE June 19 : Please see my follow-up post about this security update.] Today Microsoft released a security bulletin covering several issues that could potentially affect SQL Server; these exploits include remote code execution, denial of service, information disclosure and elevation of privilege. You should test these patches on all machines running SQL Server, including those running only client tools (e.g. Management Studio or Management Studio Express). The updates affect...(read more)

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  • Speaking on SharePoint 2010 and Silverlight tonight

    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). This feed URL has been discontinued. Please update your reader's URL to : http://feeds.feedburner.com/winsmarts Read full article .... ...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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