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• Building the Ultimate SharePoint 2010 Development Environment

  - by Manesh Karunakaran

  It’s been more than a month since SharePoint 2010 RTMed. And a lot of people have downloaded and set up their very own SharePoint 2010 development rigs. And quite a few people have written blogs about setting up good development environments, there is even an MSDN article on it. Two of the blogs worth noting are from MVPs Sahil Malik and Wictor Wilén. Make sure that you check these out as well. Part of the bad side-effects of being a geek is the need to do the technical stuff the best way possible (pragmatic or otherwise), but the problem with this is that what is considered “best” is relative. Precisely the reason why you are reading this post now. Most of the posts that I read are out dated/need updations or are using the wrong OS’es or virtualization solutions (again, opinions vary) or using them the wrong way. Here’s a developer’s view of Building the Ultimate SharePoint 2010 Development Rig. If you are a sales guy, it’s time to close this window. Confusion 1: Which Host Operating System and Virtualization Solution to use? This point has been beaten to death in numerous blog posts in the past, if you have time to invest, read this excellent post by our very own SharePoint Joel on this subject. But if you are planning to build the Ultimate Development Rig, then Windows Server 2008 R2 with Hyper-V is the option that you should be looking at. I have been using this as my primary OS for about 6-7 months now, and I haven’t had any Driver issue or Application compatibility issue. In my experience all the Windows 7 drivers work fine with WIN2008 R2 also. You can enable Aero for eye candy (and the Windows 7 look and feel) and except for a few things like the Hibernation support (which a can be enabled if you really want it), Windows Server 2008 R2, is the best Workstation OS that I have used till date. But frankly the answer to this question of which OS to use depends primarily on one question - Are you willing to change your primary OS? If the answer to that is ‘Yes’, then Windows 2008 R2 with Hyper-V is the best option, if not look at vmWare or VirtualBox, both are equally good. Those who are familiar with a Virtual PC background might prefer Sun VirtualBox. Besides, these provide support for running 64 bit guest machines on 32 bit hosts if the underlying hardware is truly 64 bit. See my earlier post on this. Since we are going to make the ultimate rig, we will use Windows Server 2008 R2 with Hyper-V, for reasons mentioned above. Confusion 2: Should I use a multi-(virtual) server set up? A lot of people use multiple servers for their development environments - like Wictor Wilén is suggesting - one server hosting the Active directory, one hosting SharePoint Server and another one for SQL Server. True, this mimics the production environment the best possible way, but as somebody who has fallen for this set up earlier, I can tell you that you don’t really get anything by doing this. Microsoft has done well to ensure that if you can do it on one machine, you can do it in a farm environment as well. Besides, when you run multiple Server class machine instances in parallel, there are a lot of unwanted processor cycles wasted for no good use. In my personal experience, as somebody who needs to switch between MOSS 2007/SharePoint 2010 environments from time to time, the best possible solution is to Make the host Windows Server 2008 R2 machine your Domain Controller (AD Server) Make all your Virtual Guest OS’es join this domain. Have each Individual Guest OS Image have it’s own local SQL Server instance. The advantages are that you can reuse the users and groups in each of the Guest operating systems, you can manage the users in one place, AD is light weight and doesn't take too much resources on your host machine and also having separate SQL instances for each of the Development images gives you maximum flexibility in terms of configuration, for example your SharePoint rigs can have simpler DB configurations, compared to your MS BI blast pits. Confusion 3: Which Operating System should I use to run SharePoint 2010 Now that’s a no brainer. Use Windows 2008 R2 as your Guest OS. When you are building the ultimate rig, why compromise? If you are planning to run Windows Server 2008 as your Guest OS, there are a few patches that you need to install at different times during the installation, for that follow the steps mentioned here Okay now that we have made our choices, let’s get to the interesting part of building the rig, Step 1: Prepare the host machine – Install Windows Server 2008 R2 Install Windows Server 2008 R2 on your best Desktop/Laptop. If you have read this far, I am quite sure that you are somebody who can install an OS on your own, so go ahead and do that. Make sure that you run the compatibility wizard before you go ahead and nuke your current OS. There are plenty of blogs telling you how to make a good Windows 2008 R2 Workstation that feels and behaves like a Windows 7 machine, follow one and once you are done, head to Step 2. Step 2: Configure the host machine as a Domain Controller Before we begin this, let me tell you, this step is completely optional, you don’t really need to do this, you can simply use the local users on the Guest machines instead, but if this is a much cleaner approach to manage users and groups if you run multiple guest operating systems.  This post neatly explains how to configure your Windows Server 2008 R2 host machine as a Domain Controller. Follow those simple steps and you are good to go. If you are not able to get it to work, try this. Step 3: Prepare the guest machine – Install Windows Server 2008 R2 Open Hyper-V Manager Choose to Create a new Guest Operating system Allocate at least 2 GB of Memory to the Guest OS Choose the Windows 2008 R2 Installation Media Start the Virtual Machine to commence installation. Once the Installation is done, Activate the OS. Step 4: Make the Guest operating systems Join the Domain This step is quite simple, just follow these steps below, Fire up Hyper-V Manager, open your Guest OS Click on Start, and Right click on ‘Computer’ and choose ‘Properties’ On the window that pops-up, click on ‘Change Settings’ On the ‘System Properties’ Window that comes up, Click on the ‘Change’ button Now a window named ‘Computer Name/Domain Changes’ opens up, In the text box titled Domain, type in the Domain name from Step 2. Click Ok and windows will show you the welcome to domain message and ask you to restart the machine, click OK to restart. If the addition to domain fails, that means that you have not set up networking in Hyper-V for the Guest OS to communicate with the Host. To enable it, follow the steps I had mentioned in this post earlier. Step 5: Install SQL Server 2008 R2 on the Guest Machine SQL Server 2008 R2 gets installed with out hassle on Windows Server 2008 R2. SQL Server 2008 needs SP2 to work properly on WIN2008 R2. Also SQL Server 2008 R2 allows you to directly add PowerPivot support to SharePoint. Choose to install in SharePoint Integrated Mode in Reporting Server Configuration. Step 6: Install KB971831 and SharePoint 2010 Pre-requisites Now install the WCF Hotfix for Microsoft Windows (KB971831) from this location, and SharePoint 2010 Pre-requisites from the SP2010 Installation media. Step 7: Install and Configure SharePoint 2010 Install SharePoint 2010 from the installation media, after the installation is complete, you are prompted to start the SharePoint Products and Technologies Configuration Wizard. If you are using a local instance of Microsoft SQL Server 2008, install the Microsoft SQL Server 2008 KB 970315 x64 before starting the wizard. If your development environment uses a remote instance of Microsoft SQL Server 2008 or if it has a pre-existing installation of Microsoft SQL Server 2008 on which KB 970315 x64 has already been applied, this step is not necessary. With the wizard open, do the following: Install SQL Server 2008 KB 970315 x64. After the Microsoft SQL Server 2008 KB 970315 x64 installation is finished, complete the wizard. Alternatively, you can choose not to run the wizard by clearing the SharePoint Products and Technologies Configuration Wizard check box and closing the completed installation dialog box. Install SQL Server 2008 KB 970315 x64, and then manually start the SharePoint Products and Technologies Configuration Wizard by opening a Command Prompt window and executing the following command: C:\Program Files\Common Files\Microsoft Shared Debug\Web Server Extensions\14\BIN\psconfigui.exe The SharePoint Products and Technologies Configuration Wizard may fail if you are using a computer that is joined to a domain but that is not connected to a domain controller. Step 8: Install Visual Studio 2010 and SharePoint 2010 SDK Install Visual Studio 2010 Download and Install the Microsoft SharePoint 2010 SDK Step 9: Install PowerPivot for SharePoint and Configure Reporting Services Pop-In the SQLServer 2008 R2 installation media once again and install PowerPivot for SharePoint. This will get added as another instance named POWERPIVOT. Configure Reporting Services by following the steps mentioned here, if you need to get down to the details on how the integration between SharePoint 2010 and SQL Server 2008 R2 works, see Working Together: SQL Server 2008 R2 Reporting Services Integration in SharePoint 2010 an excellent article by Alan Le Marquand Step 10: Download and Install Sample Databases for Microsoft SQL Server 2008R2 SharePoint 2010 comes with a lot of cool stuff like PerformancePoint Services and BCS, if you need to try these out, you need to have data in your databases. So if you want to save yourself the trouble of creating sample data for your PerformancePoint and BCS experiments, download and install Sample Databases for Microsoft SQL Server 2008R2 from CodePlex. And you are done! Fire up your Visual Studio 2010 and Start Coding away!!

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• Flashing your Windows Phone Dummies

  - by Martin Hinshelwood

  The rate at which vendors release new updates for the HD2 is ridiculously slow. You have to wait for Microsoft to release the new OS, then you wait for HTC to build it into a ROM, and then you have to wait up to 6 months for your operator to badly customise it for their network. Once Windows Phone 7 is released this problem should go away as Microsoft is likely to be able to update the phone over the air, but what do we do until then? I want Windows Mobile 6.5.5 now!   I’m an early adopter. If there is a new version of something then that’s the version I want. As long as you accept that you are using something on a “let the early adopter beware” and accept that there may be bugs, sometimes serious crippling bugs the go for it. Note that I won't be responsible if you end up bricking your phone, unlocking or flashing your radio or ROM can be risky. If you follow the instructions then you should be fine, I've flashed my phones (SPV, M300, M1000, M2000, M3100, TyTN, TyTN 2, HD2) hundreds of times without any problems! I have been using Windows Mobile 6.5.5 before it was called 6.5.5 and for long enough that I don’t even remember when I first started using it. I was using it on my HTC TyTN 2 before I got an HD2 a couple of months before Christmas, and the first custom ROM’s for the HD2 were a couple of months after that. I always update to the latest ROM that I like, and occasionally I go back to the stock ROM’s to have a look see, but I am always disappointed. Terms: Soft Reset: Same as pulling out the battery, but is like a reboot for your phone Hard Reset: Reinstalls the Operating system from the Image that is stored on it ROM: This is Image that is loaded onto your phone and it is used to reinstall your phone whenever you do a “hard reset”. Stock ROM: A ROM from the original vendor… So HTC Cook a ROM: Referring to Cooking a ROM is the process a ROM developer goes through to take all of the parts (OS, Drivers and Applications) that make up a running phone and compiling them into a ROM. ROM Kitchen: A place where you get an SDK and all the component parts of the phone: OD, Drivers and Application. There are usually lots of Tools for making it easier to compile and build the image. Flashing: The process of updating one of the layers of your phone with a new layer Bricked: This is what happens when flashing goes wrong. Your phone is now good for only one thing… stopping paper blowing away in a windy place. You can “cook” you own ROM using one of the many good “ROM Kitchens” or you can use a ROM built and tested by someone else. I have cooked my own ROM before, and while the tutorials are good, it is a lot of hassle. You can only Flash new ROM’s that are specifically for your phone only so find a ROM for your phone and XDA Developers is the best place to look. It has a forum based structure and you can find your phone quite easily. XDA Developer Forum Installing a new ROM does have its risks. In the past there have been stories about phones being “bricked” but I have not heard of a bricked phone for quite some years. if you follow the instructions carefully you should not have any problems. note: Most of the tools are written by people for whom English is not their first language to you will need concentrate hard to understand some of the instructions. Have you ever read a manual that was just literally translated from another language? Enough said… There are a number of layers on your phone that you will need to know about: SPL: This is the lowest level, like a BIOS on a PC and is the Operating Systems gateway to the hardware Radio: I think of this as the hardware drivers, and you will need a different Radio for CDMA than GSM networks ROM: This is like your Windows CD, but it is stored internally to the Phone. Flashing your phone consists of replacing one Image with another and then wiping your phone and automatically reinstall from the Image. Sometimes when you download an Image wither it is for a Radio or for ROM you only get a file called *.nbh. What do you do with this? Well you need an RUU application to push that Image to your phone. The RUU’s are different per phone, but there is a CustomRUU for the HD2 that will update your phone with any *.nbh placed in the same directory. Download and Instructions for CustomRUU #1 Flash HardSPL An SPL is kind of like a BIOS, and the default one has checks to make sure that you are only installing a signed ROM. This would prevent you from installing one that comes from any other source but the vendor. NOTE: Installing a HARD SPL invalidates your warranty so remember to Flash your phone with a “stock” vendor ROM before trying to send your phone in for repairs. Is the warranty reinstated when you go back to a stock ROM? I don’t know… Updating your SPL to a HardSPL effectively unlocks your phone so you can install anything you like. I would recommend the HardSPL2. Download and Instructions for HardSPL2 #2 Task29 One of the problems that has been seen on the HD2 when flashing new ROM’s is that things are left over from the old ROM. For a while the recommendation was to Flash a stock ROM first, but some clever cookies have come up with “Task29” which formats your phone first. After running this your phone will be blank and will only boot to the white HTC logo and no further. You should follow the instructions and reboot (remove battery) and hold down the “volume down” button while turning you HD2 on to enter the bootloader. From here you can run CustomRUU once the USB message appears. Download and Instructions for Task29 #2 Flash Radio You may need to play around with this one, there is no good and bad version and the latest is not always the best. You know that annoying thing when you hit “end call” on your phone and nothing happens? Well that's down to the Radio. Get this version right for you and you may even be able to make calls. From a Windows Mobile as well Download There are no instructions here, but they are the same as th ROM, but you use this *.nbh file. #3 Flash ROM If you have gotten this far then you are probably a pro by now Just download the latest ROM below and Flash to your phone. I have been really impressed by the Artemis line of ROM’s but it is no way the only choice. I like this one as the developer builds them as close to the stock ROM as possible while updating to the latest of everything. Download and Instructions for  Artemis HD2 vXX Conclusion While updating your ROM is not for the faint hearted it provides more options than the Stock ROM’s and quicker feature updates than waiting… Technorati Tags: WM6

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• Metro: Query Selectors

  - by Stephen.Walther

  The goal of this blog entry is to explain how to perform queries using selectors when using the WinJS library. In particular, you learn how to use the WinJS.Utilities.query() method and the QueryCollection class to retrieve and modify the elements of an HTML document. Introduction to Selectors When you are building a Web application, you need some way of easily retrieving elements from an HTML document. For example, you might want to retrieve all of the input elements which have a certain class. Or, you might want to retrieve the one and only element with an id of favoriteColor. The standard way of retrieving elements from an HTML document is by using a selector. Anyone who has ever created a Cascading Style Sheet has already used selectors. You use selectors in Cascading Style Sheets to apply formatting rules to elements in a document. For example, the following Cascading Style Sheet rule changes the background color of every INPUT element with a class of .required in a document to the color red: input.red { background-color: red } The “input.red” part is the selector which matches all INPUT elements with a class of red. The W3C standard for selectors (technically, their recommendation) is entitled “Selectors Level 3” and the standard is located here: http://www.w3.org/TR/css3-selectors/ Selectors are not only useful for adding formatting to the elements of a document. Selectors are also useful when you need to apply behavior to the elements of a document. For example, you might want to select a particular BUTTON element with a selector and add a click handler to the element so that something happens whenever you click the button. Selectors are not specific to Cascading Style Sheets. You can use selectors in your JavaScript code to retrieve elements from an HTML document. jQuery is famous for its support for selectors. Using jQuery, you can use a selector to retrieve matching elements from a document and modify the elements. The WinJS library enables you to perform the same types of queries as jQuery using the W3C selector syntax. Performing Queries with the WinJS.Utilities.query() Method When using the WinJS library, you perform a query using a selector by using the WinJS.Utilities.query() method.  The following HTML document contains a BUTTON and a DIV element: <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Application1</title> <!-- WinJS references --> <link href="//Microsoft.WinJS.0.6/css/ui-dark.css" rel="stylesheet"> <script src="//Microsoft.WinJS.0.6/js/base.js"></script> <script src="//Microsoft.WinJS.0.6/js/ui.js"></script> <!-- Application1 references --> <link href="/css/default.css" rel="stylesheet"> <script src="/js/default.js"></script> </head> <body> <button>Click Me!</button> <div style="display:none"> <h1>Secret Message</h1> </div> </body> </html> The document contains a reference to the following JavaScript file named \js\default.js: (function () { "use strict"; var app = WinJS.Application; app.onactivated = function (eventObject) { if (eventObject.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) { WinJS.Utilities.query("button").listen("click", function () { WinJS.Utilities.query("div").clearStyle("display"); }); } }; app.start(); })(); The default.js script uses the WinJS.Utilities.query() method to retrieve all of the BUTTON elements in the page. The listen() method is used to wire an event handler to the BUTTON click event. When you click the BUTTON, the secret message contained in the hidden DIV element is displayed. The clearStyle() method is used to remove the display:none style attribute from the DIV element. Under the covers, the WinJS.Utilities.query() method uses the standard querySelectorAll() method. This means that you can use any selector which is compatible with the querySelectorAll() method when using the WinJS.Utilities.query() method. The querySelectorAll() method is defined in the W3C Selectors API Level 1 standard located here: http://www.w3.org/TR/selectors-api/ Unlike the querySelectorAll() method, the WinJS.Utilities.query() method returns a QueryCollection. We talk about the methods of the QueryCollection class below. Retrieving a Single Element with the WinJS.Utilities.id() Method If you want to retrieve a single element from a document, instead of matching a set of elements, then you can use the WinJS.Utilities.id() method. For example, the following line of code changes the background color of an element to the color red: WinJS.Utilities.id("message").setStyle("background-color", "red"); The statement above matches the one and only element with an Id of message. For example, the statement matches the following DIV element: <div id="message">Hello!</div> Notice that you do not use a hash when matching a single element with the WinJS.Utilities.id() method. You would need to use a hash when using the WinJS.Utilities.query() method to do the same thing like this: WinJS.Utilities.query("#message").setStyle("background-color", "red"); Under the covers, the WinJS.Utilities.id() method calls the standard document.getElementById() method. The WinJS.Utilities.id() method returns the result as a QueryCollection. If no element matches the identifier passed to WinJS.Utilities.id() then you do not get an error. Instead, you get a QueryCollection with no elements (length=0). Using the WinJS.Utilities.children() method The WinJS.Utilities.children() method enables you to retrieve a QueryCollection which contains all of the children of a DOM element. For example, imagine that you have a DIV element which contains children DIV elements like this: <div id="discussContainer"> <div>Message 1</div> <div>Message 2</div> <div>Message 3</div> </div> You can use the following code to add borders around all of the child DIV element and not the container DIV element: var discussContainer = WinJS.Utilities.id("discussContainer").get(0); WinJS.Utilities.children(discussContainer).setStyle("border", "2px dashed red");   It is important to understand that the WinJS.Utilities.children() method only works with a DOM element and not a QueryCollection. Notice that the get() method is used to retrieve the DOM element which represents the discussContainer. Working with the QueryCollection Class Both the WinJS.Utilities.query() method and the WinJS.Utilities.id() method return an instance of the QueryCollection class. The QueryCollection class derives from the base JavaScript Array class and adds several useful methods for working with HTML elements: addClass(name) – Adds a class to every element in the QueryCollection. clearStyle(name) – Removes a style from every element in the QueryCollection. conrols(ctor, options) – Enables you to create controls. get(index) – Retrieves the element from the QueryCollection at the specified index. getAttribute(name) – Retrieves the value of an attribute for the first element in the QueryCollection. hasClass(name) – Returns true if the first element in the QueryCollection has a certain class. include(items) – Includes a collection of items in the QueryCollection. listen(eventType, listener, capture) – Adds an event listener to every element in the QueryCollection. query(query) – Performs an additional query on the QueryCollection and returns a new QueryCollection. removeClass(name) – Removes a class from the every element in the QueryCollection. removeEventListener(eventType, listener, capture) – Removes an event listener from every element in the QueryCollection. setAttribute(name, value) – Adds an attribute to every element in the QueryCollection. setStyle(name, value) – Adds a style attribute to every element in the QueryCollection. template(templateElement, data, renderDonePromiseContract) – Renders a template using the supplied data.  toggleClass(name) – Toggles the specified class for every element in the QueryCollection. Because the QueryCollection class derives from the base Array class, it also contains all of the standard Array methods like forEach() and slice(). Summary In this blog post, I’ve described how you can perform queries using selectors within a Windows Metro Style application written with JavaScript. You learned how to return an instance of the QueryCollection class by using the WinJS.Utilities.query(), WinJS.Utilities.id(), and WinJS.Utilities.children() methods. You also learned about the methods of the QueryCollection class.

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• The embarrassingly obvious about SQL Server CE

  - by Edward Boyle

  I have been working with SQL servers in one form or another for almost two decades now. But I am new to SQL Server Compact Edition. In the past weeks I have been working with SQL Serve CE a lot. The SQL, not a problem, but the engine itself is very new to me. One of the issues I ran into was a simple SQL statement taking excusive amounts of time; by excessive, I mean over one second. I wrote a little code to time the method. Sometimes it took under one second, other times as long as three seconds. –But it was a simple update statement! As embarrassing as it is, why it was slow eluded me. I posted my issue to MSDN and I got a reply from ErikEJ (MS MVP) who runs the blog “Everything SQL Server Compact” . I know little to nothing about SQL Server Compact. This guy is completely obsessed very well versed in CE. If you spend any time in MSDN forums, it seems that this guy single handedly has the answer for every CE question that comes up. Anyway, he said: “Opening a connection to a SQL Server Compact database file is a costly operation, keep one connection open per thread (incl. your UI thread) in your app, the one on the UI thread should live for the duration of your app.” It hit me, all databases have some connection overhead and SQL Server CE is not a database engine running as a service drinking Jolt Cola waiting for someone to talk to him so he can spring into action and show off his quarter-mile sprint capabilities. Imagine if you had to start the SQL Server process every time you needed to make a database connection. Principally, that is what you are doing with SQL Server CE. For someone who has worked with Enterprise Level SQL Servers a lot, I had to come to the mental image that my Open connection to SQL Server CE is basically starting a service, my own private service, and by closing the connection, I am shutting down my little private service. After making the changes in my code, I lost any reservations I had with using CE. At present, my Data Access Layer class has a constructor; in that constructor I open my connection, I also have OpenConnection and CloseConnection methods, I also implemented IDisposable and clean up any connections in Dispose(). I am still finalizing how this assembly will function. – That’s beside the point. All I’m trying to say is: “Opening a connection to a SQL Server Compact database file is a costly operation”

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• NHibernate Pitfalls: Fetch and Paging

  - by Ricardo Peres

  This is part of a series of posts about NHibernate Pitfalls. See the entire collection here. NHibernate allows you to force loading additional references (many to one, one to one) or collections (one to many, many to many) in a query. You must know, however, that this is incompatible with paging. It’s easy to see why. Let’s say you want to get 5 products starting on the fifth, you can issue the following LINQ query: 1: session.Query<Product>().Take(5).Skip(5).ToList(); Will product this SQL in SQL Server: 1: SELECT 2: TOP (@p0) product1_4_, 3: name4_, 4: price4_ 5: FROM 6: (select 7: product0_.product_id as product1_4_, 8: product0_.name as name4_, 9: product0_.price as price4_, 10: ROW_NUMBER() OVER( 11: ORDER BY 12: CURRENT_TIMESTAMP) as __hibernate_sort_row 13: from 14: product product0_) as query 15: WHERE 16: query.__hibernate_sort_row > @p1 17: ORDER BY If, however, you wanted to bring as well the associated order details, you might be tempted to try this: 1: session.Query<Product>().Fetch(x => x.OrderDetails).Take(5).Skip(5).ToList(); Which, in turn, will produce this SQL: 1: SELECT 2: TOP (@p0) product1_4_0_, 3: order1_3_1_, 4: name4_0_, 5: price4_0_, 6: order2_3_1_, 7: product3_3_1_, 8: quantity3_1_, 9: product3_0__, 10: order1_0__ 11: FROM 12: (select 13: product0_.product_id as product1_4_0_, 14: orderdetai1_.order_detail_id as order1_3_1_, 15: product0_.name as name4_0_, 16: product0_.price as price4_0_, 17: orderdetai1_.order_id as order2_3_1_, 18: orderdetai1_.product_id as product3_3_1_, 19: orderdetai1_.quantity as quantity3_1_, 20: orderdetai1_.product_id as product3_0__, 21: orderdetai1_.order_detail_id as order1_0__, 22: ROW_NUMBER() OVER( 23: ORDER BY 24: CURRENT_TIMESTAMP) as __hibernate_sort_row 25: from 26: product product0_ 27: left outer join 28: order_detail orderdetai1_ 29: on product0_.product_id=orderdetai1_.product_id 30: ) as query 31: WHERE 32: query.__hibernate_sort_row > @p1 33: ORDER BY 34: query.__hibernate_sort_row; However, because of the JOIN, what happens is that, if your products have more than one order details, you will get several records – one per order detail – per product, which means that pagination will be broken. There is an workaround, which forces you to write your LINQ query in another way: 1: session.Query<OrderDetail>().Where(x => session.Query<Product>().Select(y => y.ProductId).Take(5).Skip(5).Contains(x.Product.ProductId)).Select(x => x.Product).ToList() Or, using HQL: 1: session.CreateQuery("select od.Product from OrderDetail od where od.Product.ProductId in (select p.ProductId from Product p skip 5 take 5)").List<Product>(); The generated SQL will then be: 1: select 2: product1_.product_id as product1_4_, 3: product1_.name as name4_, 4: product1_.price as price4_ 5: from 6: order_detail orderdetai0_ 7: left outer join 8: product product1_ 9: on orderdetai0_.product_id=product1_.product_id 10: where 11: orderdetai0_.product_id in ( 12: SELECT 13: TOP (@p0) product_id 14: FROM 15: (select 16: product2_.product_id, 17: ROW_NUMBER() OVER( 18: ORDER BY 19: CURRENT_TIMESTAMP) as __hibernate_sort_row 20: from 21: product product2_) as query 22: WHERE 23: query.__hibernate_sort_row > @p1 24: ORDER BY 25: query.__hibernate_sort_row); Which will get you what you want: for 5 products, all of their order details.

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• Partition disk for dual boot Windows XP and Windows 7 (shared documents)

  - by soupagain

  I wish to dual boot Windows XP and Windows 7. I wish to have my documents available from both OSes. Do I create a single partition and it just works? 2 partitions, one for each OS? 3 partitions, one for each OS and one for the "my documents"? [EDIT] I used 3 partitions, one for each partition and one for docs which is mapped as a separate drive. Works perfectly. The only think you need to do is hide the other OS partition, ie for Windows XP, hide the Windows 7 partition. You do this from partition manager.

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• Hyper-V File Server Clustering - at my wit’s end

  - by René Kåbis

  I am at my wit’s end with File Server clustering under Hyper-V. I am hoping that someone might be able to help me figure out this Gordian Knot of a technology that seems to have dead ends (like forcing cluster VMs to use iSCSI drives where normally-attached VHDX drives could suffice) where logic and reason would normally provide a logical solution. My hardware: I will be running three servers (in the end), but right now everything is taking place on one server. One of the secondary servers will exist purely as a witness/quorum, and another slightly more powerful one will be acting as an emergency backup (with additional storage, just not redundant) to hold the secondary AD VM and the other halves of a set of clustered VMs: the SQL VM and the file system VM. Please note, these each are the depreciated nodes of a cluster, the main nodes will be on the most powerful first machine. My heavy lifter is a machine that also contains all of the truly redundant storage on the network. If this gives anyone the heebie-geebies, too bad. It has a 6TB (usable) RAID-10 array, and will (in the end) hold the primary nodes of both aforementioned clusters, but is right now holding all VMs. This is, right now: DC01, DC02, SQL01, SQL02, FS01 & FS02. Eventually, I will be adding additional VMs to handle Exchange, Sharepoint and Lync, but only to this main server (the secondary server won't be able to handle more than three or four VMs, so why burden it? The AD, SQL & FS VMs are the most critical for the business). If anyone is now saying, “wait, what about a SAN or a NAS for the file servers?”, well too bad. What exists on the main machine is what I have to deal with. I followed these instructions, but I seem to be unable to get things to work. In order to make the file server truly redundant, I cannot trust any one machine to hold the only data store on the network. Therefore, I have created a set of iSCSI drives on the VM-host of the main machine, and attached one to each file server VM. The end result is that I want my FS01 to sit on the heavy lifter, along with its iSCSI “drive”, and FS02 will sit on the secondary machine with its own iSCSI “drive” there as well. That is, neither iSCSI drive will end up sitting on the same machine as the other. As such, the clustered FS will utterly duplicate the contents of the iSCSI drives between each other, so that if one physical machine (or the FS VM) goes toes-up, the other has got a full copy of the data on its own iSCSI drive. My problem occurs when I try to apply the file server role within the failover cluster manager. Actually, it is even before that -- it occurs when adding the disks. Since I have added each disk preferentially to a specific VM (by limiting the initiator by DNS hostname, and by adding two-way CHAP authentication), this forces each VM to be in control of its own iSCSI disk. However, when I try to add the disks to the Disks section of Storage within Failover Cluster Manager, the entire process fails for a random disk of the pair. That is, one will get online, but the other will remain offline because it does not have the correct “owner node”. I mean, really -- WTF? Of course it doesn’t have the right owner node, both drives are showing the same node name!! I cannot seem to have one drive show up with one node name as owner, and the other drive show up with the other node name as owner. And because both drives are not “online”, I cannot create a pool to apply to a cluster role. Talk about getting stuck between a rock and a hard place! I’ve got more to add, but my work is closing for the day and I have to wrap things up. I will try to add more tomorrow morning when I get in. My main objective is to have a file server VM on each machine, the storage on each machine, but a transparent failover in case one physical machine fails. Essentially, a failover FS that doesn’t care which machine fails -- the storage contents are replicated equally on each machine. Am I even heading in the right direction?

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• Website Design Versus Website Development

  Even though website design and website development is treated as one and the same thing, one should not confuse the differences between the two. To make a website complete, both a website designer and developers contribution is important as without either one we would not be able to view the websites on the world wide web.

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• Oracle's Australian Graduate Recruitment Program

  - by david.talamelli

  I have been with Oracle for 5 years now and one thing that I have found that there is never a shortage of here is - Variety. Over the last 5 years I have had the opportunity to work on projects across various countries, across various technologies and skill-sets and also across various level of seniority. No two days are the same. One of the projects I was fortunate to be involved in occurred last year and it is one of the ones that is closest to me. Last year I was able to take responsibility for our 2011 Graduate Recruitment drive in Australia. Two weeks ago I went to Sydney to meet our Graduates who started in February 2011 with us and it was great to see them come to the end (or beginning actually) of our journey together. I am excited at the potential of what our Graduates careers will develop into here with us. I remember at our interviewing last year trying to explain life in Oracle, it is great to see those same Graduates with us now learning and developing life and business skills that I hope they will take with them in their professional careers. I was talking to one of my colleagues this week who mentioned the excitement and energy that our new Graduates bring is infectious, and I agree it really is. Our Graduates have a big learning curve ahead of them and they are about to start going on rotations into some of our Business Groups - but I think it is a great experience to see how a global company operates and pulls together to achieve results together. Here is a picture we took the other week of this year's Oracle Graduates (if any of our Graduates are reading this blog - it was great seeing you in NSW and I do wish you all the success here at Oracle) Once again Oracle's Graduate Program will be running in 2011 in Australia (Graduates will start in Jan/Feb 2012). The Oracle Australia Graduate Development Program is a one-year program consisting of orientation, formal training, project rotations in one core line of business and finally job placement. The formal training is a combination of structured development programs on soft skills and functional competencies via various delivery formats. Graduates are also expected to work in a team environment and complete multiple projects addressing real business challenges and at the time gaining a broad business understanding. For our Australia program we are hiring in our North Ryde and Melbourne offices. Resume submissions are being accepted now. First Round interviews will take place in June 2011 with Final Round interviews in July 2011. The Australia Graduate Program is open to Australian Residents and Citizens who are either in the final year of their studies or have graduated the previous year. For more details on Oracle and our Graduate Program visit our Campus website To express your interest, mail your resume to [email protected]

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• 'rman' cheat-sheet and rlwrap completion

  - by katsumii

  I started using 'rlwrap' some monthes ago like one of my colleague does.bash-like features in sqlplus, rman and other Oracle command line tools (Oracle Luxembourg Core Tech' Blog by Gilles Haro)One can find specific Oracle extension for databases 9i, 10g and 11g (keyword textfile) over here. This will avoid you the need to create this .oracle_keywords file.There is 'rman' keyword file in the link above. I experimented a little and found some missing keywords which are:MAXCORRUPTION PRIMARY NOCFAU VIRTUAL COMPRESSION FOREIGN With these words added, 'rman' works like this:$ rlwrap -f ~/rman $ORACLE_HOME/bin/rman Recovery Manager: Release 11.2.0.3.0 - Production on Mon Dec 3 02:56:04 2012 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. RMAN> <-- Hit TAB Display all 211 possibilities? (y or n) As you can guess, this completion is not context aware.I found these missing words by creating a kind of 'cheat sheet' for rman with the script like below. This sheet contains list of verbs and 1st operands. I uploaded to here so one can create a coffee cup with a lot of esoteric words printed on :)validWords() { sed -n 's/^RMAN-01009: syntax error: found "identifier": expecting one of: //p' \ | sed -r 's/double-quoted-string, single-quoted-string/Some String/;s/, /" "/g;s/""//' } echo "Bogus" | rman | validWords > /tmp/rman.$$ for i in $(cat /tmp/rman.$$) do i=$(echo $i | tr -d '"') echo "#### $i ####" echo "$i Bogus" | rman | validWords done One can find more keywords in the document here.

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• Robotic Arm &ndash; Hardware

  - by Szymon Kobalczyk

  This is first in series of articles about project I've been building  in my spare time since last Summer. Actually it all began when I was researching a topic of modeling human motion kinematics in order to create gesture recognition library for Kinect. This ties heavily into motion theory of robotic manipulators so I also glanced at some designs of robotic arms. Somehow I stumbled upon this cool looking open source robotic arm: It was featured on Thingiverse and published by user jjshortcut (Jan-Jaap). Since for some time I got hooked on toying with microcontrollers, robots and other electronics, I decided to give it a try and build it myself. In this post I will describe the hardware build of the arm and in later posts I will be writing about the software to control it. Another reason to build the arm myself was the cost factor. Even small commercial robotic arms are quite expensive – products from Lynxmotion and Dagu look great but both cost around USD $300 (actually there is one cheap arm available but it looks more like a toy to me). In comparison this design is quite cheap. It uses seven hobby grade servos and even the cheapest ones should work fine. The structure is build from a set of laser cut parts connected with few metal spacers (15mm and 47mm) and lots of M3 screws. Other than that you’d only need a microcontroller board to drive the servos. So in total it comes a lot cheaper to build it yourself than buy an of the shelf robotic arm. Oh, and if you don’t like this one there are few more robotic arm projects at Thingiverse (including one by oomlout). Laser cut parts Some time ago I’ve build another robot using laser cut parts so I knew the process already. You can grab the design files in both DXF and EPS format from Thingiverse, and there are also 3D models of each part in STL. Actually the design is split into a second project for the mini servo gripper (there is also a standard servo version available but it won’t fit this arm).  I wanted to make some small adjustments, layout, and add measurements to the parts before sending it for cutting. I’ve looked at some free 2D CAD programs, and finally did all this work using QCad 3 Beta with worked great for me (I also tried LibreCAD but it didn’t work that well). All parts are cut from 4 mm thick material. Because I was worried that acrylic is too fragile and might break, I also ordered another set cut from plywood. In the end I build it from plywood because it was easier to glue (I was told acrylic requires a special glue). Btw. I found a great laser cutter service in Kraków and highly recommend it (www.ebbox.com.pl). It cost me only USD $26 for both sets ($16 acrylic + $10 plywood). Metal parts I bought all the M3 screws and nuts at local hardware store. Make sure to look for nylon lock (nyloc) nuts for the gripper because otherwise it unscrews and comes apart quickly. I couldn’t find local store with metal spacers and had to order them online (you’d need 11 x 47mm and 3 x 15mm). I think I paid less than USD $10 for all metal parts. Servos This arm uses five standards size servos to drive the arm itself, and two micro servos are used on the gripper. Author of the project used Modelcraft RS-2 Servo and Modelcraft ES-05 HT Servo. I had two Futaba S3001 servos laying around, and ordered additional TowerPro SG-5010 standard size servos and TowerPro SG90 micro servos. However it turned out that the SG90 won’t fit in the gripper so I had to replace it with a slightly smaller E-Sky EK2-0508 micro servo. Later it also turned out that Futaba servos make some strange noise while working so I swapped one with TowerPro SG-5010 which has higher torque (8kg / cm). I’ve also bought three servo extension cables. All servos cost me USD $45. Assembly The build process is not difficult but you need to think carefully about order of assembling it. You can do the base and upper arm first. Because two servos in the base are close together you need to put first with one piece of lower arm already connected before you put the second servo. Then you connect the upper arm and finally put the second piece of lower arm to hold it together. Gripper and base require some gluing so think it through too. Make sure to look closely at all the photos on Thingiverse (also other people copies) and read additional posts on jjshortcust’s blog: My mini servo grippers and completed robotic arm  Multiply the robotic arm and electronics Here is also Rob’s copy cut from aluminum My assembled arm looks like this – I think it turned out really nice: Servo controller board The last piece of hardware I needed was an electronic board that would take command from PC and drive all seven servos. I could probably use Arduino for this task, and in fact there are several Arduino servo shields available (for example from Adafruit or Renbotics).  However one problem is that most support only up to six servos, and second that their accuracy is limited by Arduino’s timer frequency. So instead I looked for dedicated servo controller and found a series of Maestro boards from Pololu. I picked the Pololu Mini Maestro 12-Channel USB Servo Controller. It has many nice features including native USB connection, high resolution pulses (0.25µs) with no jitter, built-in speed and acceleration control, and even scripting capability. Another cool feature is that besides servo control, each channel can be configured as either general input or output. So far I’m using seven channels so I still have five available to connect some sensors (for example distance sensor mounted on gripper might be useful). And last but important factor was that they have SDK in .NET – what more I could wish for! The board itself is very small – half of the size of Tic-Tac box. I picked one for about USD $35 in this store. Perhaps another good alternative would be the Phidgets Advanced Servo 8-Motor – but it is significantly more expensive at USD $87.30. The Maestro Controller Driver and Software package includes Maestro Control Center program with lets you immediately configure the board. For each servo I first figured out their move range and set the min/max limits. I played with setting the speed an acceleration values as well. Big issue for me was that there are two servos that control position of lower arm (shoulder joint), and both have to be moved at the same time. This is where the scripting feature of Pololu board turned out very helpful. I wrote a script that synchronizes position of second servo with first one – so now I only need to move one servo and other will follow automatically. This turned out tricky because I couldn’t find simple offset mapping of the move range for each servo – I had to divide it into several sub-ranges and map each individually. The scripting language is bit assembler-like but gets the job done. And there is even a runtime debugging and stack view available. Altogether I’m very happy with the Pololu Mini Maestro Servo Controller, and with this final piece I completed the build and was able to move my arm from the Meastro Control program.   The total cost of my robotic arm was: $10 laser cut parts $10 metal parts $45 servos $35 servo controller ----------------------- $100 total So here you have all the information about the hardware. In next post I’ll start talking about the software that I wrote in Microsoft Robotics Developer Studio 4. Stay tuned!

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• SQL SERVER – 2011 – Clipboard Ring – CTRL+SHIFT+V

  - by pinaldave

  While I was writing my earlier post SQL SERVER – 2011 – Multi-Monitor SSMS Windows, I found out that there is one more similar feature which existed in Visual Studio is also now part of SQL Server 2011 (Denali). The feature is called clipboard ring feature. This is how it works. Select Multiple object one by one using regular CTRL + X. Now instead of pasting using CTRL+V use CTRL+SHIFT+V. Well, you will see that that pasted value is rotating based on what you have earlier selected in CTRL+V. I was really happy as I think this is one of the feature of VS, I really wanted SSMS to have. Try it and let me know what you think of the same. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Server Management Studio, SQL Tips and Tricks, T SQL, Technology

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• Dotfuscator Deep Dive with WP7

  - by Bil Simser

  I thought I would share some experience with code obfuscation (specifically the Dotfuscator product) and Windows Phone 7 apps. These days twitter is a buzz with black hat and white operations coming out about how the marketplace is insecure and Microsoft failed, blah, blah, blah. So it’s that much more important to protect your intellectual property. You should protect it no matter what when releasing apps into the wild but more so when someone is paying for them. You want to protect the time and effort that went into your code and have some comfort that the casual hacker isn’t going to usurp your next best thing. Enter code obfuscation. Code obfuscation is one tool that can help protect your IP. Basically it goes into your compiled assemblies, rewrites things at an IL level (like renaming methods and classes and hiding logic flow) and rewrites it back so that the assembly or executable is still fully functional but prying eyes using a tool like ILDASM or Reflector can’t see what’s going on.  You can read more about code obfuscation here on Wikipedia. A word to the wise. Code obfuscation isn’t 100% secure. More so on the WP7 platform where the OS expects certain things to be as they were meant to be. So don’t expect 100% obfuscation of every class and every method and every property. It’s just not going to happen. What this does do is give you some level of protection but don’t put all your eggs in one basket and call it done. Like I said, this is just one step in the process. There are a few tools out there that provide code obfuscation and support the Windows Phone 7 platform (see links to other tools at the end of this post). One such tool is Dotfuscator from PreEmptive solutions. The thing about Dotfuscator is that they’ve struck a deal with Microsoft to provide a *free* copy of their commercial product for Windows Phone 7. The only drawback is that it only runs until March 31, 2010. However it’s a good place to start and the focus of this article. Getting Started When you fire up Dotfuscator you’re presented with a dialog to start a new project or load a previous one. We’ll start with a new project. You’re then looking at a somewhat blank screen that shows an Input tab (among others) and you’re probably wondering what to do? Click on the folder icon (first one) and browse to where your xap file is. At this point you can save the project and click on the arrow to start the process. Bam! You’re done. Right? Think again. The program did indeed run and create a new version of your xap (doing it’s thing and rewriting back your *obfuscated* assemblies) but let’s take a look at the assembly in Reflector to see the end result. Remember a xap file is really just a glorified zip file (or cab file if you prefer). When you ran Dotfuscator for the first time with the default settings you’ll see it created a new version of your xap in a folder under “My Documents” called “Dotfuscated” (you can configure the output directory in settings). Here’s the new xap file. Since a xap is just a zip, rename it to .cab or .zip or something and open it with your favorite unarchive program (I use WinRar but it doesn’t matter as long as it can unzip files). If you already have the xap file associated with your unarchive tool the rename isn’t needed. Once renamed extract the contents of the xap to your hard drive: Now you’ll have a folder with the contents of the xap file extracted: Double click or load up your assembly (WindowsPhoneDataBoundApplication1.dll in the example) in Reflector and let’s see the results: Hmm. That doesn’t look right. I can see all the methods and the code is all there for my LoadData method I wanted to protect. Product failure. Let’s return it for a refund. Hold your horses. We need to check out the settings in the program first. Remember when we loaded up our xap file. It started us on the Input tab but there was a settings tab before that. Wonder what it does? Here’s the default settings: Renaming Taking a closer look, all of the settings in Feature are disabled. WTF? Yeah, it leaves me scratching my head why an obfuscator by default doesn’t obfuscate. However it’s a simple fix to change these settings. Let’s enable Renaming as it sounds like a good start. Renaming obscures code by renaming methods and fields to names that are not understandable. Great. Run the tool again and go through the process of unzipping the updated xap and let’s take a look in Reflector again at our project. This looks a lot better. Lots of methods named a, b, c, d, etc. That’ll help slow hackers down a bit. What about our logic that we spent days weeks on? Let’s take a look at the LoadData method: What gives? We have renaming enabled but all of our code is still there. If you look through all your methods you’ll find it’s still sitting there out in the open. Control Flow Back to the settings page again. Let’s enable Control Flow now. Control Flow obfuscation synthesizes branching, conditional, and iterative constructs (such as if, for, and while) that produce valid executable logic, but yield non-deterministic semantic results when decompilation is attempted. In other words, the code runs as before, but decompilers cannot reproduce the original code. Do the dance again and let’s see the results in Reflector. Ahh, that’s better. Methods renamed *and* nobody can look at our LoadData method now. Life is good. More than Minimum This is the bare minimum to obfuscate your xap to at least a somewhat comfortable level. However I did find that while this worked in my Hello World demo, it didn’t work on one of my real world apps. I had to do some extra tweaking with that. Below are the screens that I used on one app that worked. I’m not sure what it was about the app that the approach above didn’t work with (maybe the extra assembly?) but it works and I’m happy with it. YMMV. Remember to test your obfuscated app on your device first before submitting to ensure you haven’t obfuscated the obfuscator. settings tab: rename tab: string encryption tab: premark tab: A few final notes Play with the settings and keep bumping up the bar to try to get as much obfuscation as you can. The more the better but remember you can overdo it. Always (always, always, always) deploy your obfuscated xap to your device and test it before submitting to the marketplace. I didn’t and got rejected because I had gone overboard with the obfuscation so the app wouldn’t launch at all. Not everything is going to be obfuscated. Specifically I don’t see a way to obfuscate auto properties and a few other language features. Again, if you crank the settings up you might hide these but I haven’t spent a lot of time optimizing the process. Some people might say to obfuscate your xaml using string encryption but again, test, test, test. Xaml is picky so too much obfuscation (or any) might disable your app or produce odd rendering effets. Remember, obfuscation is not 100% secure! Don’t rely on it as a sole way of protecting your assets. Other Tools Dotfuscator is one just product and isn’t the end-all be-all to obfuscation so check out others below. For example, Crypto can make it so Reflector doesn’t even recognize the app as a .NET one and won’t open it. Others can encrypt resources and Xaml markup files. Here are some other obfuscators that support the Windows Phone 7 platform. Feel free to give them a try and let people know your experience with them! Dotfuscator Windows Phone Edition Crypto Obfuscator for .NET DeepSea Obfuscation

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• LDAP Structure: dc=example,dc=com vs o=Example

  - by PAS

  I am relatively new to LDAP, and have seen two types of examples of how to set up your structure. One method is to have the base being: dc=example,dc=com while other examples have the base being o=Example. Continuing along, you can have a group looking like: dn: cn=team,ou=Group,dc=example,dc=com cn: team objectClass: posixGroup memberUid: user1 memberUid: user2 ... or using the "O" style: dn: cn=team, o=Example objectClass: posixGroup memberUid: user1 memberUid: user2 My questions are: Are there any best practices that dictate using one method over the other? Is it just a matter of preference which style you use? Are there any advantages to using one over the other? Is one method the old style, and one the new-and-improved version? So far, I have gone with the dc=example,dc=com style. Any advice the community could give on the matter would be greatly appreciated.

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• OpenSSH SFTP server with chroot() + user with chroot exception

  - by HannesFostie

  I am currently setting up an SFTP server but there is one detail I can't seem to figure out. When I add a user, I would like him to connect using his client and be able to write in his "root dir" right away. My Match case for the SFTP-users group currently has ChrootDirectory set as "/home/%u", and inside that directory I have to have a subdirectory owned by the user, while /home/%u itself is owned by root. Next to that, the "root dir" also has a couple files, .bashrc to name one. Is it possible to put these files somewhere else, remove them, or at least make them invisible to the user? Thanks EDIT: One more little thing I'd like to implement is for one account to have read (or rw, not sure yet) access to all other users' home directories. What is the easiest way to implement this? EDIT 2: Basically, having one user be an exception to the chroot rule would get me started.

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• First toe in the water with Object Databases : DB4O

  - by REA_ANDREW

  I have been wanting to have a play with Object Databases for a while now, and today I have done just that.  One of the obvious choices I had to make was which one to use.  My criteria for choosing one today was simple, I wanted one which I could literally wack in and start using, which means I wanted one which either had a .NET API or was designed/ported to .NET.  My decision was between two being: db4o MongoDb I went for db4o for the single reason that it looked like I could get it running and integrated the quickest.  I am making a Blogging application and front end as a project with which I can test and learn with these object databases.  Another requirement which I thought I would mention is that I also want to be able to use the said database in a shared hosting environment where I cannot install, run and maintain a server instance of said object database.  I can do exactly this with db4o. I have not tried to do this with MongoDb at time of writing.  There are quite a few in the industry now and you read an interesting post about different ones and how they are used with some of the heavy weights in the industry here : http://blog.marcua.net/post/442594842/notes-from-nosql-live-boston-2010 In the example which I am building I am using StructureMap as my IOC.  To inject the object for db4o I went with a Singleton instance scope as I am using a single file and I need this to be available to any thread on in the process as opposed to using the server implementation where I could open and close client connections with the server handling each one respectively.  Again I want to point out that I have chosen to stick with the non server implementation of db4o as I wanted to use this in a shared hosting environment where I cannot have such servers installed and run.     public static class Bootstrapper    {        public static void ConfigureStructureMap()        {            ObjectFactory.Initialize(x => x.AddRegistry(new MyApplicationRegistry()));        }    }    public class MyApplicationRegistry : Registry    {        public const string DB4O_FILENAME = "blog123";        public string DbPath        {            get            {                return Path.Combine(Path.GetDirectoryName(Assembly.GetAssembly(typeof(IBlogRepository)).Location), DB4O_FILENAME);            }        }        public MyApplicationRegistry()        {            For<IObjectContainer>().Singleton().Use(                () => Db4oEmbedded.OpenFile(Db4oEmbedded.NewConfiguration(), DbPath));            Scan(assemblyScanner =>            {                assemblyScanner.TheCallingAssembly();                assemblyScanner.WithDefaultConventions();            });        }    } So my code above is the structure map plumbing which I use for the application.  I am doing this simply as a quick scratch pad to play around with different things so I am simply segregating logical layers with folder structure as opposed to different assemblies.  It will be easy if I want to do this with any segment but for the purposes of example I have literally just wacked everything in the one assembly.  You can see an example file structure I have on the right.  I am planning on testing out a few implementations of the object databases out there so I can program to an interface of IBlogRepository One of the things which I was unsure about was how it performed under a multi threaded environment which it will undoubtedly be used 9 times out of 10, and for the reason that I am using the db context as a singleton, I assumed that the library was of course thread safe but I did not know as I have not read any where in the documentation, again this is probably me not reading things correctly.  In short though I threw together a simple test where I simply iterate to a limit each time kicking a common task off with a thread from a thread pool.  This task simply created and added an random Post and added it to the storage. The execution of the threads I put inside the Setup of the Test and then simply ensure the number of posts committed to the database is equal to the number of iterations I made; here is the code I used to do the multi thread jobs: [TestInitialize] public void Setup() { var sw = new System.Diagnostics.Stopwatch(); sw.Start(); var resetEvent = new ManualResetEvent(false); ThreadPool.SetMaxThreads(20, 20); for (var i = 0; i < MAX_ITERATIONS; i++) { ThreadPool.QueueUserWorkItem(delegate(object state) { var eventToReset = (ManualResetEvent)state; var post = new Post { Author = MockUser, Content = "Mock Content", Title = "Title" }; Repository.Put(post); var counter = Interlocked.Decrement(ref _threadCounter); if (counter == 0) eventToReset.Set(); }, resetEvent); } WaitHandle.WaitAll(new[] { resetEvent }); sw.Stop(); Console.WriteLine("{0:00}.{1:00} seconds", sw.Elapsed.Seconds, sw.Elapsed.Milliseconds); }   I was not doing this to test out the speed performance of db4o but while I was doing this I could not help but put in a StopWatch and see out of sheer interest how fast it would take to insert a number of Posts.  I tested it out in this case with 10000 inserts of a small, simple POCO and it resulted in an average of:  899.36 object inserts / second.  Again this is just  simple crude test which came out of my curiosity at how it performed under many threads when using the non server implementation of db4o. The spec summary of the computer I used is as follows: With regards to the actual Repository implementation itself, it really is quite straight forward and I have to say I am very surprised at how easy it was to integrate and get up and running.  One thing I have noticed in the exposure I have had so far is that the Query returns IList<T> as opposed to IQueryable<T> but again I have not looked into this in depth and this could be there already and if not they have provided everything one needs to make there own repository.  An example of a couple of methods from by db4o implementation of the BlogRepository is below: public class BlogRepository : IBlogRepository { private readonly IObjectContainer _db; public BlogRepository(IObjectContainer db) { _db = db; } public void Put(DomainObject obj) { _db.Store(obj); } public void Delete(DomainObject obj) { _db.Delete(obj); } public Post GetByKey(object key) { return _db.Query<Post>(post => post.Key == key).FirstOrDefault(); } … Anyways I hope to get a few more implementations going of the object databases and literally just get familiarized with them and the concept of no sql databases. Cheers for now, Andrew

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• CRMIT’s HIGH VALUE CRM++ PLUGINS FOR CRM On DEMAND

  - by Soumo Das

  Customer satisfaction and experience being the two most considerable factors, these days businesses are on the lookout for automation tools that are world class, agile and keep quality at its core. CRMIT has developed such tools using cutting edge technologies and abstracting industry best practices and R&D.  Self Service Portal  With customers being so meticulous about regular updates and reliable access to their data, administrators just cannot think of walking a thin line. Surviving without a resource that provides a track of customer requirements for services available 24 x 7 can severely affect the productivity. In such a scenario, CRMIT’s Self Service Portal (SSP) is the best solution. This not only tracks the required customer data, but also allows companies to stay in tune with their employees, vendors and stakeholders.   One can directly sign up to become a CRMOD contact and SSP user. One need not use the database, as operations and interactions are d at run time. This is a fully configurable solution that tracks results periodically, thus making it easy for end users. It also offers better security and data visibility that enables users to progress smoothly. Quote and Order Management   When dealing with quotes, contracts and orders becomes complicated, only Quote & Order Management can work as a one-stop solution. CRMIT offers this great tool for managing all this information and for taking care of customer orders and service requirements.  This CRM On Demand plug-in allows one to create a new quote or copy the existing one. Products can be directly added from the product list of CRMOD and the pricing is calculated automatically. Quote can be generated and mailed to the external users in PDF, HTML and XLS formats. This not only allows management of quotes in an enhanced manner, but also supports various billing and tax calculation features that make work effortless.    Report Scheduler  When it comes to analyzing and providing statistics of various business processes currently running in an organization, one cannot depend on manual updates, which sometimes may be inaccurate or even delayed. CRMIT provides a SaaS based powerful solution - Report Scheduler - that allows CRM users to schedule reports as per the frequencies and then receive them as email attachments at the scheduled time.   With this powerful tool, administrators can control the report scheduler for assigning specific reports to specific users. After that, users can login and schedule any assigned report for viewing at particular intervals on monthly, weekly or daily basis. Additionally, users can also copy the mail to external users and can choose the preferred format. The best part is that sharing business data with third party become easy with this and for viewing reports, users need not log into their CRMOD account.  CRM On Demand Offline Solution CRM On-Demand Offline is another great CRM++ extension that allows one to work in both online and offline modes. Synchronizing both the modes is absolutely easy and offers ease while working. CRM OD offline works as an automation tool that not only improves efficiency, but also works as a backup in most cases. It is readily available as a windows application installer and requires users to be online only while validating and synchronizing. The best part is that working in the offline mode also works as a backup. 

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• [MINI HOW-TO] Create Keyboard Shortcuts to Applications in Windows

  - by Asian Angel

  Do you need just one or a few special keyboard shortcuts for your favorite program(s)? A quick modification to program shortcuts will get you up and running without installing additional software. Creating New Keyboard Shortcuts Go to the start menu shortcut for the program, right-click on it, and select properties. When the properties window opens click in the shortcut key text area. All that you need to do is choose an appropriate letter for the program (i.e. O for Opera, E for Editra, etc.) and type it in the blank. You will not need to type any other keys or combination in…the “Ctrl + Alt +” will be automatically entered for you as soon as you type the letter in. Click OK to finish creating the new keyboard shortcut. Those new keyboard shortcuts will speed up access to your favorite software. Another example from our system using “I” for Iron Browser. Certainly much quicker than using the start menu. Conclusion If you only need one or just a few special keyboard shortcuts then this method provides a quick and simple solution. Similar Articles Productive Geek Tips Show Keyboard Shortcut Access Keys in Windows VistaUse the Windows Key for the "Start" Menu in Ubuntu LinuxCreate Custom Windows Key Keyboard Shortcuts in WindowsHow-To Geek on Lifehacker: Control Your Computer with Shortcuts & Speed Up Vista SetupKeyboard Ninja: 21 Keyboard Shortcut Articles TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips CloudBerry Online Backup 1.5 for Windows Home Server Snagit 10 VMware Workstation 7 Acronis Online Backup Windows Firewall with Advanced Security – How To Guides Sculptris 1.0, 3D Drawing app AceStock, a Tiny Desktop Quote Monitor Gmail Button Addon (Firefox) Hyperwords addon (Firefox) Backup Outlook 2010

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• Avoid Memory Leaks in SharePoint2010 Development

  - by ybbest

  When you develop SharePoint solution using code, you need to Dispose SPWeb appropriately to avoid memory Leaks. The general guideline for this are: Dispose Not to dispose OpenWebEnumerating Webs or AllWebs ParentWebRootWeb SPWeb from SPContext There are more rules than the one list above and as a smart SharePoint developer, you do not have to memories all the rules .There is a tool called SharePoint Dispose Checker which can help you to find potential memory leak. To use SPDisposeChecker in you solution, you need to download the tool from MSDN Code Gallery and install it in your development machine as follow. 1. Run the installer with elevated privilege. 2. Accept the agreement and click next. 3. Select those two options and click next. 4. Select Everyone and click Next. 5. Go to Toolsà SharePoint Dispose Check to Configure the SPDisposeCheck. 6. You can change the Treat problems as Errors to Warnings. 7. after clicking Save, you are all set to use the tool.Recompile my project , I can get the result below. References: SharePoint 2007/2010 “Do Not Dispose Guidance” + SPDisposeCheck

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• Excel hyperlink not redirecting properly (bug?)

  - by Andrej

  I don't know is this is the right place to post this questions, but I have an excel hyperlink problem. Here's the thing. I click on let's say "A1", copy the link in it (http://www.godaddy.com/domains/searchresults.aspx?ci=54814), right click on hyperlink and copy that SAME URL as the link (if it is not automatically detected and changed). When I go to click on it, I am readirected to http://www.godaddy.com/domains/search.aspx?ci=53972. If I copy and paste the link directly into the browser, it works fine. Somebody knows what's going on? Thank you for your time. Andrej

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• SQL Windowing screencast session for Cuppa Corner - rolling totals, data cleansing

  - by tonyrogerson

  In this 10 minute screencast I go through the basics of what I term windowing, which is basically the technique of filtering to a set of rows given a specific value, for instance a Sub-Query that aggregates or a join that returns more than just one row (for instance on a one to one relationship). http://sqlserverfaq.com/content/SQL-Basic-Windowing-using-Joins.aspx SQL below... USE tempdb go CREATE TABLE RollingTotals_Nesting ( client_id int not null, transaction_date date not null, transaction_amount...(read more)

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• The Top 6 Security Mistakes .NET Developers Make

  Are you guilty of one of these?

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• Technical : Configure WebCenter PS5 with WebCenter Content - Good Example

  - by Vikram Kurma

  Read Intro for this post and understand the problem here Solution  : To integrate Jdeveloper with WebCenter Content PS5 and browse through the folders , we need to enable "folders_g" features instead of "Framework Folders" . Detailed steps below . Login to Webcenter content using admin credentials https://<hostname>:<port number>/cs Go to "Administration" menu and click on "Admin Server"  In the newly opened browser , click on 'Component Manager' in the left navigation menu . On the right hand side , you should see "Advanced Component Manager" , click on it . You will now see a list of enabled and disabled features . Disable "Framework Folders" and enable "folders_g" folders . Restart the server . There you go ! . You should have a successful connection and you should be able to traverse through the contribution folders from Jdeveloper. I am posting a few pics to help you navigate the steps .    

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• Reminder: True WCF Asynchronous Operation

  - by Sean Feldman

  A true asynchronous service operation is not the one that returns void, but the one that is marked as IsOneWay=true. Without this, client will always wait for valid response from server, blocking execution. Possible work-around is to generate asynchronous methods and subscribe to Completed event, but then it’s a pseudo asynchronous. Real fire-and-forget is with one way operations.

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• Class Loading Deadlocks

  - by tomas.nilsson

  Mattis follows up on his previous post with one more expose on Class Loading Deadlocks As I wrote in a previous post, the class loading mechanism in Java is very powerful. There are many advanced techniques you can use, and when used wrongly you can get into all sorts of trouble. But one of the sneakiest deadlocks you can run into when it comes to class loading doesn't require any home made class loaders or anything. All you need is classes depending on each other, and some bad luck. First of all, here are some basic facts about class loading: 1) If a thread needs to use a class that is not yet loaded, it will try to load that class 2) If another thread is already loading the class, the first thread will wait for the other thread to finish the loading 3) During the loading of a class, one thing that happens is that the <clinit method of a class is being run 4) The <clinit method initializes all static fields, and runs any static blocks in the class. Take the following class for example: class Foo { static Bar bar = new Bar(); static { System.out.println("Loading Foo"); } } The first time a thread needs to use the Foo class, the class will be initialized. The <clinit method will run, creating a new Bar object and printing "Loading Foo" But what happens if the Bar object has never been used before either? Well, then we will need to load that class as well, calling the Bar <clinit method as we go. Can you start to see the potential problem here? A hint is in fact #2 above. What if another thread is currently loading class Bar? The thread loading class Foo will have to wait for that thread to finish loading. But what happens if the <clinit method of class Bar tries to initialize a Foo object? That thread will have to wait for the first thread, and there we have the deadlock. Thread one is waiting for thread two to initialize class Bar, thread two is waiting for thread one to initialize class Foo. All that is needed for a class loading deadlock is static cross dependencies between two classes (and a multi threaded environment): class Foo { static Bar b = new Bar(); } class Bar { static Foo f = new Foo(); } If two threads cause these classes to be loaded at exactly the same time, we will have a deadlock. So, how do you avoid this? Well, one way is of course to not have these circular (static) dependencies. On the other hand, it can be very hard to detect these, and sometimes your design may depend on it. What you can do in that case is to make sure that the classes are first loaded single threadedly, for example during an initialization phase of your application. The following program shows this kind of deadlock. To help bad luck on the way, I added a one second sleep in the static block of the classes to trigger the unlucky timing. Notice that if you uncomment the "//Foo f = new Foo();" line in the main method, the class will be loaded single threadedly, and the program will terminate as it should. public class ClassLoadingDeadlock { // Start two threads. The first will instansiate a Foo object, // the second one will instansiate a Bar object. public static void main(String[] arg) { // Uncomment next line to stop the deadlock // Foo f = new Foo(); new Thread(new FooUser()).start(); new Thread(new BarUser()).start(); } } class FooUser implements Runnable { public void run() { System.out.println("FooUser causing class Foo to be loaded"); Foo f = new Foo(); System.out.println("FooUser done"); } } class BarUser implements Runnable { public void run() { System.out.println("BarUser causing class Bar to be loaded"); Bar b = new Bar(); System.out.println("BarUser done"); } } class Foo { static { // We are deadlock prone even without this sleep... // The sleep just makes us more deterministic try { Thread.sleep(1000); } catch(InterruptedException e) {} } static Bar b = new Bar(); } class Bar { static { try { Thread.sleep(1000); } catch(InterruptedException e) {} } static Foo f = new Foo(); }

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