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  • Process synchronisation in Linux

    <b>Linux User and Developer:</b> "The two fundamental concepts in a Linux operating system are processes and time slice. A process is an instance of a program that is being executed by the computer&#8217;s operating system."

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  • Remote debugging revisited

    - by Fabrice Marguerie
    ConsolR is a nice little add-on for your ASP.NET projects that you can use to play with your live applications.ConsolR enables you to execute C# code againt a running .NET 4.0 web application's app domain through a browser. Once installed, ConsolR will automatically configure itself during application start and is accessible through the "/consolr" path. This enables an interactive console session against for instance an application's production environment. IntroductionProject site

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  • At $20/month Windows Azure host my website with 99.97% uptime

    - by Gopinath
    Couple of years ago a reliable and decent performing Windows hosting was not affordable to many enthusiastic developers who want to try a startup idea or build a hobby site. I tried to start an ASP.NET website few years ago to provide services like – Mobile Tracing, Vehicle Tracing. But due to high cost of Windows hosting I developed those services using PHP (not an easy task for .NET developer) and hosted on them Linux servers.  But with recent evolution of Windows Azure, hosting ASP.NET websites on highly reliable servers is affordable. Today anyone can host a high responsive and available ASP.NET website for just $20/month using Windows Azure. My website coziie.com is running on Windows Azure and serves close to quarter millions visitors a month with 99.97% of uptime and most of the page load times are less than 3 seconds. All I spend to run this website is just around $20, if you translate it to India rupees its roughly Rs.1000. The web sever of coziie.com is powered by a single Extra Small Web role instance and the backend is powered by a SQL Azure instance. Azure is quite impressive to provide 99.97% of uptime. Response times during peak are around 3 seconds and on nomarl loads it is around 1.5 seconds. Here is the report of uptime provided by Royal Pingdom over last one year For just $20/month Windows Azure takes care of the following apart from hosting Patches up Windows OS to the latest version Upgrades ASP.NET to the latest version – coziie.com is running on ASP.NET MVC 3 and soon I’ll upgrade it to ASP.NET MVC 4 Hosts data on latest and best version Sql Server database SQL Azure maintains 3 copies of database and automatically recovers in case of server failures and disasters. I never worry about database backups/restore. Provides staging environment for deploying applications for testing purpose and move them to production – I upgrade  twice a month on average With Windows Azure I no longer focus on server maintenance or data backups. They are taken up by Microsoft team and I just focus on building my website. Wish there is a low cost Linux version of Windows Azure so that I can stop worrying about server maintenance of this blog!! If you are looking for a Windows hosting, look no further than Windows Azure. If you find $20/month is a bit expensive to start with you may explore Azure Website (sort of shared hosted environment) which is free to start with and as your traffic grows you can move to paid hosting.

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  • Stupid Geek Tricks: Extract Links Off Any Webpage Using PowerShell

    - by Taylor Gibb
    PowerShell 3 has a lot of new features, including some powerful new web-related features. They dramatically simplify automating the web, and today we are going to show you how you can extract every single link off a webpage, and optionally download the resource if you so wish. Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows

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  • Getting the right results with bcp and DTS with multiple versions of SQL Server installed.

    - by fatherjack
    I was using SSIS for the first time on an instance the other day and came across this error when I executed a package Package migration from version 3 to version 2 failed with error 0xC001700A. The version number in the package is not valid. The version number cannot be greater than current version number. This was a pain and wasn't something that I was expecting, however, the error message made sense - the package was being executed by the wrong version of the executable. Not impossible to...(read more)

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  • Marmalade SDK views navigation concepts

    - by Mina Samy
    I want to develop a simple multi-Activity Android game using Marmalade SDK. I looked at the SDK samples and found that most of them are a single view (Android Activity) apps. The Navigation model in Android is a stack-like model where views are pushed and popped. I can't find whether Marmalade has a similar model or it uses a different approach. would you please explain this to me and provide tutorials and samples to navigation in Marmalade if possible ? Thanks

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  • Should we use an outside CMS?

    - by SomeKittens
    I work at a web design/development shop. Everything we do is centered around the Joomla! CMS. I'm a bit worried-if anything goes wrong with Joomla (major security flaw revealed, Joomla folds and ceases development) we're sunk. I'm meeting with the CEO to plan the next few steps for our company. Should I recommend that we create our own in-house CMS or am I just being paranoid about a single point of failure?

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  • How to deal with malicious domain redirections?

    - by user359650
    It is possible for anybody to buy a domain name containing negative terms and point it to someone's website in order to damage their reputation. For instance someone could buy the domain child-pornography.com and point it to the address 64.34.119.12 which is the address behind stackoverflow.com and people navigating to the domain in question would end up visualizing content from StackExchange which would be detrimental to StackExchange's image. To illustrate this, I added the entry 64.34.119.12 child-pornography.com to my /etc/hosts file and tested. Here is what I obtained: I personally found this user experience terrible as someone could think that Stack Exchange are in favor of child pornography and awaiting support from the community to create a Q&A site about it. I tested with other websites and experienced other behaviors that I would categorize as follows: 1 - Useful 404 page (happens with stackoverflow.com): For me the worst way of handling this as the image of the targeted website is directly associated with the offending domain. The more useful the 404 page, the bigger the impression that the targeted website would be willing to help with child pornography. 2 - Redirection (happens with microsoft.com): For instance when accessing child-pornography.com you get redirected to www.microsoft.com. It isn't as bad as above as the offending domain name never appears alongside the targeted website's content, but still bad in my opinion as it gives the impression the targeted website bought the offending domain and redirected it to their website to get more traffic. 3 - Server error (happens with lemonde.fr): You get an error from the webserver which page doesn't contain any content that can be associated with the targeted website (e.g. default Apache 404 page, completely blank page). I believe that is good as the identify of the targeted website isn't revealed. Above are the various behaviors I experienced, but I also thought about a fourth way of dealing with this which is described below. 4 - Disclaimer page (haven't found any website implementing that technique): Display a message such as : "You ended here because someone bought and linked the child-pornography.com domain to our website. We do not own this domain and do not associate ourselves with it. This request has been logged by our servers and we will raise this issue with the competent authorities to have this domain taken down. If you want to access our website, please click here." The good thing about this method is that it can be implemented at application layer (good if you don't have control over web server which happens with some hosting solutions), allows you to protect yourself from any liability, and offer the visitor to be redirected to your own website. Which of the above options would you implement to deal with malicious domain linking (IMO only options 3 and 4 are worth considering) ?

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  • Blending transition in cocos2d

    - by fiddler
    In my cocos2d-iphone game, I have 2 backgrounds (CCnodes), each containing a quite complex hierarchy of sprites. I would like to make a smooth transition between them: initially, only the first background is visible at the end, only the second one is visible Is there a good way to set the opacity of a full hierarchy of sprites ? I tried to recursively set the opacity of all the contained sprites. It kinda works except that: i guess it's not very efficient i would like the opacity of overlapping sprites to be 'merged' (as if the background was one single big sprite)

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  • Amtrak's Mobile-SOA Oracle SOA Solution at OpenWorld

    - by Bruce Tierney
    During yesterday's Mobile SOA Session, Innowave presented their ticketing solution implemented for Amtrak which uses Oracle SOA Suite for service-enablement with support for Microsoft Windows Mobile handheld devices.  Innowave's Hilal Khan described this chart and highlighted the value of a service-based approach since the data went to handhelds as well as to APEX reports with a single service implementation:

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  • What standards to use in Business Process Modelling?

    - by user1268690
    There are several approaches on how to model a business process in software applications (BPM software). For instance, a processes can be described in BPMN, EPC, IDEF0, SOMF, etc. Additionally, different process execution languages such as BPEL, RPC, Wf-XML are available. If I were to develop software for the BPM-market, which standards should I implement or focus on? Which standards are most suitable if my BPM software was going to be implemented in my client's IT-System?

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  • Why some video posts from the same blog appear in google with thumbs, while others do not?

    - by jayarjo
    We own media blog - which is basically a big collection of various videos streamed through our branded player. Interesting thing is that some of our posts show up in google search results with a thumb denoting that the post in question is in fact a video. But more often they are not. We basically wonder why? What does affect it and can we control it somehow? All posts (their single pages) have facebook og meta tags in place.

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  • prism and multiple screens

    - by Avi
    OK - I am studying Prism a little because of a "free weekend" offer on Pluralsight. As this is proving too complex for me, I went to the Prism book and looked at the forward, and this is what it said: What comes after “Hello, World?” WPF and Silverlight developers are blessed with an abundance of excellent books... There’s no lack of tutorials on Model-View-ViewModel ... But they stop short of the guidance you need to deliver a non-trivial application in full. Your first screen goes well. You add a second screen and a third. Because you started your solution with the built-in “Navigation Application Template,” adding new screens feels like hanging shirts on a closet rod. You are on a roll. Until the harsh reality of real application requirements sets in. As it happens, your application has 30 screens not three. There’s no room on that closet rod for 30 screens. Some screens are modal pop-ups; you don’t navigate to a pop-up. Screens become interdependent such that user activity in one screen triggers changes that propagate throughout the UI. Some screens are optional; others are visible only to authorized users. Some screens are permanent, while other screens can be opened and closed at will. You discover that navigating back to a previously displayed screen creates a new instance. That’s not what you expected and, to your horror, the prior instance is gone along with the user’s unsaved changes. Now the issue is, I don't relate to this description. I've never been a UI programmer, but same as everyone else I'm using Windows apps such as MS-Office, and web sites such as Amazon, Facebook and StackExchange. And I look at these and I don't see many "so many screens" issues! Indeed, the only applications having many windows I can think of is Visual Studio. Maybe also Visio, a little. But take Word - You have a ribbon and a main window. Or take Facebook: You have those lists on the left (Favorites, Lists, Groups etc.), the status middle, the adds and then the Contacts sidebar. But it's only one page. Of course, I understand that in enterprise scenarios there are dashboad applications where multiple segments of the screen are updated from multiple non-related services. This I dig. But other scenarios? So - What am I missing? What is the "multiple screens" monster Pirsm is supposed to be the silver bullet solution for? Shoud I invest in studying Prism in addition to learning WPF or ASP.NET MVC?

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  • Database recovery model change notification report for SQL Server

    The database recovery model plays a crucial role for the recovery of a database. With several DBAs having access to a SQL Server instance there are bound to be changes that are not communicated. In this tip we cover a monitoring solution we deployed at our company to alert the DBAs if a database recovery model is different than what it is expected. The Future of SQL Server MonitoringMonitor wherever, whenever with Red Gate's SQL Monitor. See it live in action now.

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  • Google I/O 2012 - Data Driven Storytelling

    Google I/O 2012 - Data Driven Storytelling Michael Fink, Yinnon Haviv, Dani Bacon From a single chart to elaborate data driven storytelling, Google Chart Tools now provides a crisp and accessible experience based on our new HTML5 gallery. Come and learn how you can use animations, annotations and other visual semantics and to take user-interaction with rich data, to the next level. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 563 10 ratings Time: 53:05 More in Science & Technology

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  • How can I merge the different keyboard indicators?

    - by Agmenor
    Presently I use two application indicators showing a keyboard: input methods (iBus) keyboard layout Is there a way to make them merge into one single indicator icon ? What I have in mind is the equivalent of the messaging menu (gathering all that is related to communications) or the sound menu (gathering all the controls for sound). If it is too complicated to merge the indicators, is the merge planned for an upcoming Ubuntu release? I am on Ubuntu 11.10 with Unity as my environment.

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  • Well-tested libraries for player ratings?

    - by Lucky
    It's common in games to implement some sort of numerical ranking system -- the ELO system is usually used in chess. I could implement this system naively using Wikipedia's descriptions, but I suspect that this would open up a whole box of problems that have already been solved: rating inflation, etc -- for instance, the ELO system has a K constant that's 'fudged' according to rating, duration, pairings, statistics, ... What are some libraries (I'm looking at Python, but anything is okay) that implements rating systems? It also doesn't have to be ELO.

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  • What technologies and tools would I need to create an advanced 3D game on Unreal Engine 3?

    - by BleakCabalist
    This is a purely hypothetical question. Let's say I already have the UE3 license and would like to create an advanced single-player FPS. What other tools/technologies would I need? For example for audio, animations, modeling and so on. I mean all of them. I've been looking for some time now and can't find any source, which would say what's needed from beggining to the end of game development cycle.

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  • Creating classed in JavaScript

    - by Renso
    Goal:Creating class instances in JavaScript is not available since you define "classes" in js with object literals. In order to create classical classes like you would in c#, ruby, java, etc, with inheritance and instances.Rather than typical class definitions using object literals, js has a constructor function and the NEW operator that will allow you to new-up a class and optionally provide initial properties to initialize the new object with.The new operator changes the function's context and behavior of the return statement.var Person = function(name) {   this.name = name;};   //Init the personvar dude= new Person("renso");//Validate the instanceassert(dude instanceof Person);When a constructor function is called with the new keyword, the context changes from global window to a new and empty context specific to the instance; "this" will refer in this case to the "dude" context.Here is class pattern that you will need to define your own CLASS emulation library:var Class = function() {   var _class = function() {      this.init.apply(this, arguments);   };   _class.prototype.init = function(){};   return _class;}var Person a new Class();Person.prototype.init = function() {};var person = new Person;In order for the class emulator to support adding functions and properties to static classes as well as object instances of People, change the emulator:var Class = function() {   var _class = function() {      this.init.apply(this, arguments);   };   _class.prototype.init = function(){};   _class.fn = _class.prototype;   _class.fn.parent = _class;   //adding class properties   _class.extend = function(obj) {      var extended = obj.extended;      for(var i in obj) {         _class[i] = obj[i];      };      if(extended) extended(_class);   };   //adding new instances   _class.include = function(obj) {      var included = obj.included;      for(var i in obj) {         _class.fn[i] = obj[i];      };      if(included) included(_class);   };   return _class;}Now you can use it to create and extend your own object instances://adding static functions to the class Personvar Person = new Class();Person.extend({   find: function(name) {/*....*/},      delete: function(id) {/*....*/},});//calling static function findvar person = Person.find('renso');   //adding properties and functions to the class' prototype so that they are available on instances of the class Personvar Person = new Class;Person.extend({   save: function(name) {/*....*/},   delete: function(id) {/*....*/}});var dude = new Person;//calling instance functiondude.save('renso');

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  • Representing complex object dependencies

    - by max
    I have several classes with a reasonably complex (but acyclic) dependency graph. All the dependencies are of the form: class X instance contains an attribute of class Y. All such attributes are set during initialization and never changed again. Each class' constructor has just a couple parameters, and each object knows the proper parameters to pass to the constructors of the objects it contains. class Outer is at the top of the dependency hierarchy, i.e., no class depends on it. Currently, the UI layer only creates an Outer instance; the parameters for Outer constructor are derived from the user input. Of course, Outer in the process of initialization, creates the objects it needs, which in turn create the objects they need, and so on. The new development is that the a user who knows the dependency graph may want to reach deep into it, and set the values of some of the arguments passed to constructors of the inner classes (essentially overriding the values used currently). How should I change the design to support this? I could keep the current approach where all the inner classes are created by the classes that need them. In this case, the information about "user overrides" would need to be passed to Outer class' constructor in some complex user_overrides structure. Perhaps user_overrides could be the full logical representation of the dependency graph, with the overrides attached to the appropriate edges. Outer class would pass user_overrides to every object it creates, and they would do the same. Each object, before initializing lower level objects, will find its location in that graph and check if the user requested an override to any of the constructor arguments. Alternatively, I could rewrite all the objects' constructors to take as parameters the full objects they require. Thus, the creation of all the inner objects would be moved outside the whole hierarchy, into a new controller layer that lies between Outer and UI layer. The controller layer would essentially traverse the dependency graph from the bottom, creating all the objects as it goes. The controller layer would have to ask the higher-level objects for parameter values for the lower-level objects whenever the relevant parameter isn't provided by the user. Neither approach looks terribly simple. Is there any other approach? Has this problem come up enough in the past to have a pattern that I can read about? I'm using Python, but I don't think it matters much at the design level.

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  • Addressing threats introduced by the BYOD trend

    - by kyap
    With the growth of the mobile technology segment, enterprises are facing a new type of threats introduced by the BYOD (Bring Your Own Device) trend, where employees use their own devices (laptops, tablets or smartphones) not necessarily secured to access corporate network and information.In the past - actually even right now, enterprises used to provide laptops to their employees for their daily work, with specific operating systems including anti-virus and desktop management tools, in order to make sure that the pools of laptop allocated are spyware or trojan-horse free to access the internal network and sensitive information. But the BYOD reality is breaking this paradigm and open new security breaches for enterprises as most of the username/password based systems, especially the internal web applications, can be accessed by less or none protected device.To address this reality we can adopt 3 approaches:1. Coué's approach: Close your eyes and assume that your employees are mature enough to know what he/she should or should not do.2. Consensus approach: Provide a list of restricted and 'certified' devices to the internal network. 3. Military approach: Access internal systems with certified laptop ONLYIf you choose option 1: Thanks for visiting my blog and I hope you find the others entries more useful :)If you choose option 2: The proliferation of new hardware and software updates every quarter makes this approach very costly and difficult to maintain.If you choose option 3: You need to find a way to allow the access into your sensitive application from the corporate authorized machines only, managed by the IT administrators... but how? The challenge with option 3 is to find out how end-users can restrict access to certain sensitive applications only from authorized machines, or from another angle end-users can not access the sensitive applications if they are not using the authorized machine... So what if we find a way to store the applications credential secretly from the end-users, and then automatically submit them when the end-users access the application? With this model, end-users do not know the username/password to access the applications so even if the end-users use their own devices they will not able to login. Also, there's no need to reconfigure existing applications to adapt to the new authenticate scheme given that we are still leverage the same username/password authenticate model at the application level. To adopt this model, you can leverage Oracle Enterprise Single Sign On. In short, Oracle ESSO is a desktop based solution, capable to store credentials of Web and Native based applications. At the application startup and if it is configured as an esso-enabled application - check out my previous post on how to make Skype essso-enabled, Oracle ESSO takes over automatically the sign-in sequence with the store credential on behalf of the end-users. Combined with Oracle ESSO Provisioning Gateway, the credentials can be 'pushed' in advance from an actual provisioning server, like Oracle Identity Manager or Tivoli Identity Manager, so the end-users can login into sensitive application without even knowing the actual username and password, so they can not login with other machines rather than those secured by Oracle ESSO.Below is a graphical illustration of this approach:With this model, not only you can protect the access to sensitive applications only from authorized machine, you can also implement much stronger Password Policies in terms of Password Complexity as well as Password Reset Frequency but end-users will not need to remember the passwords anymore.If you are interested, do not hesitate to check out the Oracle Enterprise Single Sign-on products from OTN !

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  • ForgeRock Picks Up Sun's Open Source Identity

    <b>Datamation:</b> "Among the promises of open source software is that there is no vendor lock-in. It's a promise that new open source startup ForgeRock is aiming to deliver upon by supporting and extending the OpenSSO open source single sign-on and identity management platform formerly supported by Sun Microsystems."

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  • No excuse for programmers and multiple platforms

    <b>Technology & Life Integration:</b> "Programming across multiple operating systems is easy. I do it. I have done it for several years. I don't need to have seperate code trees for each operating system. I have a single set of code that I work on and it compiles on different operating systems without having to modify the code!"

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