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• Book review coming soon...

  After a long silence, I will continue blogging on .NET. The becoming post will be a book review (one is confirmed for now). Timeframe is in a few weeks.Tech tips are still on hold, it's harder to write new tips on ASP.NET anymore, feels as if everything is almost immediately covered after the product launches so planning a writing serie or something beforehand isn't really interesting. I'd love to blog about new things...Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!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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• Access to the Technology Software

  - by rituchhibber

  The Technology Program software is available to Oracle partners, free of charge, for demonstration and development purposes according to the terms of the OPN Agreement. Instructions for Ordering Software: Download software via the Oracle Software Delivery Cloud website. Downloads are available in most countries. To determine if downloads are available within your country click on the Download software link. Request a physical shipment of the software by downloading and completing the Development and Demonstration Ordering Document (XLS). Should you have additional questions or need assistance in completing the ordering document, please contact your local Partner Business Center. Incomplete orders will not be processed.

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• Ubuntu on AMD based Sony Vaio VPCY B15AG

  - by Gaurav

  Last week I bought a AMD E350 (AMD Fusion platform) based Sony VAIO (VPCYB15AG) having AMD Radeon HD 6310 graphics, I removed Windows that came along with and installed Ubuntu 10.10 (AMD64) using USB drive. During installation my touchpad was not working, I managed through keyboard, but after completing installation & restarting the machine still there was no touchpad support. Also there's no proper graphic card drivers. Even I tried connecting the USB mouse to it but the left key is not working and had to configure the mouse as left-hand to get the left click enabled. I tried searching for any possible solutions for these but found nothing helpful, is there any hope? What should I do to enable i) enable touch pad support ii) get higher resolution 1366x768, etc?

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• How Do I interpret HDD S.M.A.R.T Results?

  - by Marty

  My laptop has recently started to become a bit unreliable, and for some reason I started to suspect that my HDD was starting to fail. After a bit of hunting on the internet, I found Ubuntu's Disk Utility in the System menu and ran the long SMART diagnostics from this. However, since the documentation for Disk Utility is very poor (palimpsest?), I'm not sure how to interpret the results: For example, the Read Error Rate is over 50 million (!), yet the Assessment is rated "Good". So would someone mind explaining to me how to interpret the results of these tests (especially the Normalized, Worst, Threshold and Value numbers)? And maybe tell me what they think of the results I got for my HDD? (Thanks)

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• TOMORROW! UPK for Testing Webinar

  - by Karen Rihs

  UPK Webinar:  UPK for Testing September 13, 2012 10 am pacific / 1 pm eastern As an implementation and enablement tool, Oracle’s User Productivity Kit (UPK) provides value throughout the software lifecycle.  Application testing is one area where customers like Northern Illinois University (NIU) are finding huge value in UPK and are using it to validate their systems.  Join us for an OAUG-sponsored event on Sept 13th to hear Beth Renstrom, UPK Product Manager and Bettylynne Gregg, NIU ERP Coordinator, discuss how the Test It Mode, Test Scripts, and Test Cases of UPK can be used to facilitate applications testing. Click Here to Register

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• I can't open Ubuntu Software Center

  - by user165700

  I downloaded google chrome that was made for my computer from https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb. For some reason after I installed I can't open. Also in the corner where the time and other things are there's this red circle with a white dash in the middle of it. It says "An error occured, please run package manager from the right click menu or apt-get in a terminal to see what is wrong. The error message was: 'Unknown Error:''(E:The package google-chrome-stable needs to be reinstalled,but I can't find an archive for it.)' This usually means that your installed packages have unmet dependencies.

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• Phone crash when try to use vibration on Android

  - by Diego Unanue

  Im developing an app that when you click a button the phone has to vibrate, the issue is that the phone just chashes. Saing that I need permitions to vibrate. I've already set this permition in the build.setting (android manifiest). Here is the code build.settings: settings = { orientation = { default = "portrait", supported = { "portrait", } }, iphone = { plist= { CoronaUseIOS7LandscapeOnlyWorkaround = true, CoronaUseIOS7IPadPhotoPickerLandscapeOnlyWorkaround = true, CoronaUseIOS6LandscapeOnlyWorkaround = true, CoronaUseIOS6IPadPhotoPickerLandscapeOnlyWorkaround = true, UIApplicationExitsOnSuspend = false, UIPrerenderedIcon = true, UIStatusBarHidden = false, CFBundleIconFile = "Icon.png", CFBundleIconFiles = { "Icon.png", "[email protected]", "Icon-60.png", "[email protected]", "Icon-72.png", "[email protected]", "Icon-76.png", "[email protected]", "Icon-Small.png", "[email protected]", "Icon-Small-40.png", "[email protected]", "Icon-Small-50.png", "[email protected]", }, }, }, android = { permissions = { { name = ".permission.C2D_MESSAGE", protectionLevel = "signature" }, }, usesPermissions = { "android.permission.INTERNET", "android.permission.VIBRATE", }, }, } the file that uses the vibration is: local onButtonEvent = function (event ) system.vibrate() end I read all post in Corona page without success. Can I see the android manifest to see if the permissions are there. I've read that is a Corona issue not sure.

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• Announcing: Oracle's Sun Flash Accelerator F80 PCIe Card

  - by uwes

  Ramp Up Your Server Performance with Oracle's Sun Flash Accelerator F80 PCIe Card! Oracle’s Sun Flash Accelerator F80 PCIe Card accelerates IO-starved applications and server performance by reducing storage latencies and increasing I/O throughput for greater productivity and business response! Sun Flash Accelerator F80 PCIe Card offers the following: Helps servers and their applications run faster and more efficient, while reducing power and space With 800GB capacity, delivers 2x the capacity of the previous F40 Flash Card for less than half the $/GB Accelerates I/O constrained databases with increased IOPS and consistent low-latency response timers Current and planned server support includes: The F80 is currently supported in Oracle’s SPARC T4-1, T4-2 and X4-2L servers.  SPARC T5, M5, M6 and Fujitsu M10 server support is planned for December 2013 (Preliminary only) Please read the Sales Bulletin on Oracle HW TRC for more details. (If you are not registered on Oracle HW TRC, click here ... and follow the instructions..) For More Information Go To: Oracle.com Flash Page Oracle Technology Network Flash Page

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• Poor mobile performance when running from Eclipse

  - by Yajirobe_LOL

  So after weeks of thinking my rendering code was bad, I accidentally discovered the following: Running my game on a Nexus S From Eclipse (Debug as - Android application): 12fps From the device while still attached to USB (getting log info in Eclipse still): 24fps From the device while not attached via USB: 56fps I was wondering if anyone else has issues like this? I mean, the problem really isn't a problem since the final release build will likely have good performance, but for the time being I don't want to have to keep (un)plugging my device in and out when testing code all day long. Is there some remedy for this or does anyone have any input/advice? Thanks.

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• In case you missed our Febrary Oracle Database Webcasts....

  - by jenny.gelhausen

  Click below to register and listen to the February Database Webcast replays: Maximize Availability with Oracle Database 11g with Oracle Database expert Joe Meeks. Think Your Database Applications are Secure? Think Again. with Oracle Security expert Roxana Bradescu. SANS Oracle Database Security: A Defense in Depth Approach with SANS senior instructor Tanya Baccam. Upgrading to Oracle Database 11g with Roger Snowden from Oracle Support's Center of Expertise. Consolidate for Business Advantage: From Storage to Scorecard with Oracle Business Intelligence and Enterprise Performance Management expert Tobin Gilman. Enjoy! var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• Typical Method Of Building Puzzle Levels

  - by Josh Kahane

  Hi I am designing a puzzle game for the iphone and was wondering as most puzzle games consist of the player progressing through multiple levels. You see for example Angry Birds has over 100 levels. Once the basis of the game is made, how do developers typically go about building their levels? Do they generally build them from scratch each one more or less, or work of their own template or have some other method which they use to tailor these levels? I imagine building so many levels is a long process, certainly if building each one individually. Do they do this, or have a method which speeds it up once they have their basis? Thanks.

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• Announcing: Oracle Solaris Cluster Product Bulletin, May 2014

  - by uwes

  New qualifications announcements and general news for Oracle Solaris Cluster products can be found in the new Product Bulletin Hardware Qualifications New Oracle ZFS Storage Appliance Kit versions with Oracle Solaris Cluster 4.1 geographic cluster Pillar AXIOM 600 with Oracle Solaris Cluster 4.1 on x86 Software Qualifications SAP Livecache 7.9 and MAXDB 7.9 Oracle Weblogic Server 12.1.2 Latest Support Information Oracle Solaris Cluster 4.1 SRU 7 (4.1.7) Oracle Solaris Cluster 3.3 3/13 patch train #5 Resources Configuration guides and documentation Product Update Bulletin Archives Contacts Please read the Product Bulletin on Oracle HW TRC for more details. (If you are not registered on Oracle HW TRC, click here ... and follow the instructions..) _____________________________________________________________________ For More Information Go To:Oracle.com Oracle Solaris Cluster page Oracle Technology Network Oracle Solaris Cluster pageOracle Solaris Cluster MOS communityPartner web Oracle Solaris Cluster pageOracle Solaris Cluster Blog

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• Oracle Transportation Management Annual Customer Conference

  - by [email protected]

  The 2010 Oracle Transportation Management (OTM) Conference will be held June 13-16 in Philadelphia, Pennsylvania. The conference brings together all things OTM: users, prospective users, development personnel, product strategy, implementation experts, and software and services partners.  With over 200 attendees, this conference is the premiere location and time to learn about OTM, build relationships with peers, and get answers to all your OTM questions.    This year's conference will be held at the: Sheraton Society Hill, One Dock St., Philadelphia, PA. 19106Companies speaking at this year's event include:AT&T Land O Lakes BlueScope Steel Baillie Lumber Kraft Sears Roseburg Forest Products Toyota Beckman CoulterLevi StraussNiagara BottlingSmurfit StonePQ CorporationOffice Depot               To register click here http://www.otmconference.com/ConfAgenda.aspx.  1

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• Slowdowns while using Firefox

  - by aneal

  I have Windows 7 and Natty installed on my computer. There is no problem on Windows 7's side, but whenever I log into Natty, it slows down while using Firefox 4. I tried it in normal mode using Unity and classic mode. However, the result is the same: it slows down e.g. when I scroll, it takes time to get effect, and also when I click other tabs, it takes time to active them. Moreover I cannot type properly, due to the lag. I don't know what the problem is?

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• SQL SERVER – Finding Latch Statistics

  - by pinaldave

  Last month I wrote SQL Server Wait Types and Queues series SQL SERVER – Summary of Month – Wait Type – Day 28 of 28. I had great fun to write the series. I learned a lot and I felt this has created some deep interest on the subject with others. I recently received very interesting question from one of the reader after reading SQL SERVER – PAGELATCH_DT, PAGELATCH_EX, PAGELATCH_KP, PAGELATCH_SH, PAGELATCH_UP – Wait Type – Day 12 of 28 that if they can know what kind of latches are waiting and what is their count. Absolutely! SQL Server team has already provided DMV which does the same. -- Latch SELECT * FROM sys.dm_os_latch_stats ORDER BY wait_time_ms DESC Above script will return you details about how many latches were waiting for how long. After going over this script I feel like going deep into the subject further. I will post a blog post on the subject soon. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• MSDN Magazine May Issue is Live

  Editor's Note: This Way-Cool 'Internet' Doohickey It wasn't all that long ago that surfing meant grabbing a board and hanging 10. Keith Ward Silverlight Security: Securing Your Silverlight Applications Josh Twist explains the unique challenges developers face in securing Silverlight applications. He shows where to focus your efforts, concentrating on the key aspects of authentication and authorization. Josh Twist Now Playing: Building Custom Players with the Silverlight Media Framework...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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• Partner Webcast - Upgrade Oracle Forms to 11g version

  - by Dmitry Nefedkin

  Description Oracle Forms, a component of Oracle Fusion Middleware, is Oracle's long-established technology to design and build enterprise applications quickly and efficiently. The latest Oracle Forms release is 11g, and it’s the only release supported right now. During this webinar we are going to explore the architecture and the new features of Oracle Forms 11g, describe the steps required to upgrade from the previous Oracle Forms releases.  If you’re still on Forms 10g or earlier you should not miss a chance to join this webinar.  Agenda Oracle Forms releases/support/license policy Oracle Forms 11g architecture Oracle Forms 11g new features Oracle Forms 11gR2 upgrade steps Installation of the Forms 11g environment Configuring the environment Upgrading Forms Modules Useful links Content The recording is available, use the following link. Or you can just watch the slides below. Upgrade Oracle Forms to 11g View more presentations from Oracle ISV Migration Center.

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• Questions to ask interviewer in an Interview

  - by chota

  Hello All, I have an SDET interview upcoming week. I have been preparing since long. It is a good company. I am working as SDET since two year. I wonder what questions should i ask to my interviewer regarding testing and other thing. I would appreciate your help if you give me some sample questions that i should ask to my interviewer during the interview. Some of them i thoughts are a) What type of testing methodologies do you use? Do you have triage meeting everyday? What percentage of code coverage is done by unit tests? I do not find these questions to be more effective, i would appreciate if somebody could help me out in coming out with better question?

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• C# async and actors

  - by Alex.Davies

  If you read my last post about async, you might be wondering what drove me to write such odd code in the first place. The short answer is that .NET Demon is written using NAct Actors. Actors are an old idea, which I believe deserve a renaissance under C# 5. The idea is to isolate each stateful object so that only one thread has access to its state at any point in time. That much should be familiar, it's equivalent to traditional lock-based synchronization. The different part is that actors pass "messages" to each other rather than calling a method and waiting for it to return. By doing that, each thread can only ever be holding one lock. This completely eliminates deadlocks, my least favourite concurrency problem. Most people who use actors take this quite literally, and there are plenty of frameworks which help you to create message classes and loops which can receive the messages, inspect what type of message they are, and process them accordingly. But I write C# for a reason. Do I really have to choose between using actors and everything I love about object orientation in C#? Type safety Interfaces Inheritance Generics As it turns out, no. You don't need to choose between messages and method calls. A method call makes a perfectly good message, as long as you don't wait for it to return. This is where asynchonous methods come in. I have used NAct for a while to wrap my objects in a proxy layer. As long as I followed the rule that methods must always return void, NAct queued up the call for later, and immediately released my thread. When I needed to get information out of other actors, I could use EventHandlers and callbacks (continuation passing style, for any CS geeks reading), and NAct would call me back in my isolated thread without blocking the actor that raised the event. Using callbacks looks horrible though. To remind you: m_BuildControl.FilterEnabledForBuilding(    projects,    enabledProjects = m_OutOfDateProjectFinder.FilterNeedsBuilding(        enabledProjects,             newDirtyProjects =             {                 ....... Which is why I'm really happy that NAct now supports async methods. Now, methods are allowed to return Task rather than just void. I can await those methods, and C# 5 will turn the rest of my method into a continuation for me. NAct will run the other method in the other actor's context, but will make sure that when my method resumes, we're back in my context. Neither actor was ever blocked waiting for the other one. Apart from when they were actually busy doing something, they were responsive to concurrent messages from other sources. To be fair, you could use async methods with lock statements to achieve exactly the same thing, but it's ugly. Here's a realistic example of an object that has a queue of data that gets passed to another object to be processed: class QueueProcessor {    private readonly ItemProcessor m_ItemProcessor = ...     private readonly object m_Sync = new object();    private Queue<object> m_DataQueue = ...    private List<object> m_Results = ...     public async Task ProcessOne() {         object data = null;         lock (m_Sync)         {             data = m_DataQueue.Dequeue();         }         var processedData = await m_ItemProcessor.ProcessData(data); lock (m_Sync)         {             m_Results.Add(processedData);         }     } } We needed to write two lock blocks, one to get the data to process, one to store the result. The worrying part is how easily we could have forgotten one of the locks. Compare that to the version using NAct: class QueueProcessorActor : IActor { private readonly ItemProcessor m_ItemProcessor = ... private Queue<object> m_DataQueue = ... private List<object> m_Results = ... public async Task ProcessOne()     {         // We are an actor, it's always thread-safe to access our private fields         var data = m_DataQueue.Dequeue();         var processedData = await m_ItemProcessor.ProcessData(data);         m_Results.Add(processedData);     } } You don't have to explicitly lock anywhere, NAct ensures that your code will only ever run on one thread, because it's an actor. Either way, async is definitely better than traditional synchronous code. Here's a diagram of what a typical synchronous implementation might do: The left side shows what is running on the thread that has the lock required to access the QueueProcessor's data. The red section is where that lock is held, but doesn't need to be. Contrast that with the async version we wrote above: Here, the lock is released in the middle. The QueueProcessor is free to do something else. Most importantly, even if the ItemProcessor sometimes calls the QueueProcessor, they can never deadlock waiting for each other. So I thoroughly recommend you use async for all code that has to wait a while for things. And if you find yourself writing lots of lock statements, think about using actors as well. Using actors and async together really takes the misery out of concurrent programming.

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• Command line method to find disk usage of camera mounted using gvfs

  - by Hamish Downer

  When my camera was mounted on /media I could use the standard tools (df) to see the disk usage of the card in my camera. However now the camera is mounted using gvfs, and df seems to ignore it. I've also tried pydf and discus to no avail. The camera is definitely available through nautilus, and when I select the camera in nautlius, the status bar tells me the amount of disk free. I can also open the ~/.gvfs/ folder in nautilus and right click on the camera folder and get the disk usage in a graphical way. But that is no use for a script. Are there command line tools that are the equivalent of df for gvfs filesystems? Or even better, a way to make df report on gvfs filesystems?

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• Printing multiple pages per sheet doesn't work

  - by Ricky Robinson

  In Ubuntu 12.04, I added a network printer which I had previously used without any problems on a different machine (with the same release of Ubuntu). Now, with the default generic driver installed, printing multiple pages per sheet from evince doesn't work properly. If I select 2 per sheet, be it long or short edge, it always prints 4. Why is this? It used to happen with non-pdf documents in the past, like from a browser. My workaround was to print to pdf file and then print the pdf itself. Now I'm clueless... Edit: the same happens with a different network printer, in which I installed the driver specific to its particular model.

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• How to stop a tap event from propagating in a XNA / Silverlight game

  - by Mech0z

  I have a game with Silverlight / XNA game where text and buttons are created in Silverlight while 3d is done in XNA. The Silverlight controls are drawn ontop of the 3D and I dont want a click on a button to interact with the 3D underneath So I have private void ButtonPlaceBrick_Tap(object sender, GestureEventArgs e) { e.Handled = true; But my gesture handling on the 3d objects still runs even though I have set handled to true. private void OnUpdate(object sender, GameTimerEventArgs e) { while (TouchPanel.IsGestureAvailable) { // Read the next gesture GestureSample gesture = TouchPanel.ReadGesture(); switch (gesture.GestureType) How am I supposed to stop it from propagating?

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• Best C# database communication technique

  - by user65439

  A few days ago I read a reply to a question where people said that the days of writing queries within your c# code are long gone. I'm not sure what the specific person meant with the comment but it got me thinking. At the company I'm currently working at we maintain an assembly containing all the queries to the database (let's call it Queries), this assembly is reference by a QueryService (Retrieve the correct queries) assembly which in turn is referenced by a UnitOfWork assembly (The database connector classes, we have different connector classes for SQL, MySQL etc.). We use these three assemblies to perform operations on our database and all queries/commands are written in our C# code. Is there a better way to communicate with the database and is there a better way to communicate with different database types?

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• Firefox zombie process problem

  - by user52987

  When I start Firefox a Firefox zombie process starts sometimes (not always) and then goes away after a few seconds (stays sometimes until firefox is closed). This problem occurs with four computers (2 laptops and 2 desktops running ubuntu 10.04, 11.10, precise beta 1 and beta 2) I also have this same problem with other distros like Fedora 16, Linux mint 12, Debian 6 and Arch Linux. Thunderbird is also affected by this zombie process problem. Firefox safe mode does NOT help! Can someone help me to fix this problem? If you are affected by this bug please click "this bug affects me" on launchpad. My bug report (screenshot included)

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• DevConnections new "Fundamentals" Track!

  - by psheriff

  Hi All, I am now the new Track Chair for the "Fundamentals" track at DevConnections. I know many of my readers feel overwhelmed by all of the "advanced" topics out there. The folks at the DevConnections conference realized that too and have added many new sessions that help programmers that are in the beginning to intermediate stage get up to speed on all the new technology that is coming out so fast. I will be presenting a whole day long workshop at the DevConnections conference in Orlando on March 27th entitled "Essential Business Desktop Programming with .NET". In addition I will be presenting the following sessions in the Fundamentals Track. MVVM Made Simple Unit Testing Basics and Architecting Your Application for Unit Testing Data Binding from A-Z in Silverlight From Zero to Windows Phone 7 in 75 MinutesI hope I will see you there! Join me at DevConnections @devconnections in Orlando March 27-30.   Save $200 use discount code DevCon1 Register today at bit.ly/fIZjXO

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