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  • Steps to deploying on Windows Azure

    - by Vincent Grondin
    Alright, these steps might be a little detailed and of few might not be necessary but still it's a pretty accurate road map to deploying on azure...     1)     Open you solution 2)      Rebuild ALL 3)      Right click on your Azure project and click "Publish" 4)      It should open a windows explorer window with your package to be uploaded (.cspkg ) and its associated configuration (.cscfg) to be uploaded too.  Keep it open, you'll need that path later on... 5)      It should also open a browser asking you to login to your passport account, please do so. 6)      After this you will be redirected to the Azure Portal where you will see your Azure Project Name below the « Projet Name » section.  Click on it. 7)      Then you should be redirected to a detailed view of your account on Azure where you will create a new service by clicking the hyperlink on the top right corner. 8)      Choose the right service type for you, most likely the "Hosted Service" type 9)      Choose a « Label » name and click « next » 10)   Choose a name for your service and validate that the name is available in the cloud by clicking the "Check Availability" button 11)   At the bottom of this same page, you can choose to create a group for your service, use no group or join an existing group.  Creating a group means that all applications that belong to the same group will see no cost to exchanging data between other applications of the same group.  Most of the time when you create a single application, creating a group is not necessary.  You should choose a region that's close to your own region. 12)   On the next window, you should see a "Production" environment and a "Staging" environment.  Beware because "Staging" and "Production" are two different environments in the cloud and applications in "Staging" even when not runing do continue to rack in charges...  Choose an environment and click "Deploy". 13)   In the following window, browse to the path where your cspkg resides and then do the same thing with your cscfg file.  Choose a name for your Label,  and click "Deploy"... 14)   From now on, the clock is ticking and unless you have free Azure hours, your credit card is being billed… 15)   Click on the « Run » button to start your application 16)   Be patient.... be very patient… 17)   Once your application has finished starting, you should see a GREEN circle on the left side of the screen indicating that your application is READY.  Click the URL to test your application and remember that if your application is a service, you have to hit the "svc" class behind the link you see there.  Something in the likes of http://testvince2.cloudapp.net/service1.svc  (this is a fictional link) 18)   Hopefully your application will show up or in the case of a service, you will see your service's wsdl meaning that everything is working fine. Happy cloud computing all!

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  • How To Enlarge a Virtual Machine’s Disk in VirtualBox or VMware

    - by Chris Hoffman
    When you create a virtual hard disk in VirtualBox or VMware, you specify a maximum disk size. If you want more space on your virtual machine’s hard disk later, you’ll have to enlarge the virtual hard disk and partition. Note that you may want to back up your virtual hard disk file before performing these operations – there’s always a chance something can go wrong, so it’s always good to have backups. However, the process worked fine for us. Image Credit: flickrsven How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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  • Digital Asset Management System

    - by Prashant
    I am looking for an opensource web-based digital asset management system. My requirements are to create a web based system where users can upload and download .zip, .jpg, .png, .pdf, .doc, .xls etc. media files. Also user management should be there, so that we can create multiple users and accordingly give them permissions. I have found one http://www.resourcespace.org/ but it looks a bit big and complicated. It is fitting to my need but I am looking and researching a bit more to get some good and more easy to use system. If anyone knows such web based system or tool, please share.

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  • SQL SERVER – Difference Between CURRENT_TIMESTAMP and GETDATE() – CURRENT_TIMESTAMP Equivalent in SQL Server

    - by pinaldave
    A common question – I often get from Oracle/MySQL Professionals: “What is the Equivalent to CURRENT_TIMESTAMP in SQL Server?” Here is a common question I often get from SQL Server Professionals: “What are differences between Difference Between CURRENT_TIMESTAMP and GETDATE ()?” Very simple question but have showed up so frequently that I feel like to write about it. Well in SQL Server GETDATE() is Equivalent to CURRENT_TIMESTAMP. However, if you use CURRENT_TIMESTAMP in your select statement it will work fine. You can see in the above example – both of them returns the same value. Now let us go to next question regarding difference between GETDATE and CURRENT_TIMESTAMP. Well, the matter of the fact, there is no difference between them in SQL Server (Reference Link). CURRENT_TIMESTAMP is an ANSI SQL function, whereas GETDATE is T-SQL implementation of the same function. Both of them derive value from the operating system of the computer on which SQL Server instance is running. Above discussion prompts another question – in this case, what should one use GETDATE or CURRENT_TIMESTAMP? Well, this is indeed tricky and interesting question. I think I am very comfortable using the GETDATE () so I will go to use it but a matter of the fact there is no right or wrong answer. If you want to follow ancient saying “When in Rome, do as the Romans do”, I suggest using the GETDATE (), or continue using CURRENT_TIMESTAMP. With that said, there is one very important property we all need to keep in mind. If you use CURRENT_TIMESTAMP while creating an object, they are automatically converted to GETDATE() and stored internally. To illustrate what I am suggesting here is the example - Create a table using the following script CREATE TABLE [dbo].[TestTable]( [Cold2] [datetime] NULL ) ON [PRIMARY] GO ALTER TABLE [dbo].[TestTable] ADD DEFAULT (CURRENT_TIMESTAMP) FOR [Cold2] GO Now go to SSMS and generate the script for the table and you will notice following syntax. CREATE TABLE [dbo].[TestTable]( [Cold2] [datetime] NULL ) ON [PRIMARY] GO ALTER TABLE [dbo].[TestTable] ADD DEFAULT (GETDATE()) FOR [Cold2] GO You can notice that SQL Server have automatically converted CURRENT_TIMESTAMP to GETDATE(). I guess this gives us an idea how they behave. Now go ahead and make your choice! Do let me know which one will you use CURRENT_TIMESTAMP or GETDATE () in the comments area. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL DateTime, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • What are the major challenges in creating a platform such as StackOverflow?

    - by gablin
    Let us assume you were to create a platform such as StackOverflow. It needs to be functional, fast and scalable, just like SO, in order to be successful. What are the major challenges you would face in such a task? I'm looking for technical challenges rather than problems such as how to advertise it and stuff like that. (I'm not looking for ways of creating a new site to challenge SO; I'm just interested in how difficult it would be to create it if it didn't already exist.)

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  • What is the best Programming Language for Kiosk Application? [closed]

    - by Jen Lin
    I need your suggestions guys regarding the project I'm planning to create. I want to create a kiosk software/application that is capable to access database in a server. (So, there's a networking here..)Because the information that will be displayed in a Kiosk screen will be coming from a database in other computer. So my problem here is, I don't know which programming language is the best for this kind of application. I'm thinking about using Visual Basic 6.0 since my group is comfortable using this programming language, but I also want to consider the design. I don't like a plain button. Hope to hear from you guys, thanks much :)

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  • CodePlex Daily Summary for Monday, December 17, 2012

    CodePlex Daily Summary for Monday, December 17, 2012Popular ReleasesMove Mouse: Move Mouse 2.5.3: FIXED - Issue where it errors on load if the screen saver interval is over 333 minutes.LINUX????????: LINUX????????: LINUX????????cnbeta: cnbeta: cnbetaCSDN ??: CSDN??????: CSDN??????PowerShell Community Extensions: 2.1.1 Production: PowerShell Community Extensions 2.1.1 Release NotesDec 16, 2012 This version of PSCX supports both Windows PowerShell 2.0 and 3.0. Bug fix for HelpUri error with the Get-Help proxy command. See the ReleaseNotes.txt download above for more information.CRM 2011 Navigation UI Record Counter: Navigation UI Record Counter v1.3.1: Fixes Bug with Chrome Bug with parseXml - reverted to good old indexOfVidCoder: 1.4.11 Beta: Added Hungarian translation, thanks to Brechler Zsolt. Update HandBrake core to SVN 5098. This update should fix crashes on some files. Updated the enqueue split button to fit in better with the active Windows theme. Updated presets to use x264 preset/profile/level.???: Cnblogs: CNBLOGSSandcastle Help File Builder: SHFB v1.9.6.0 with Visual Studio Package: General InformationIMPORTANT: On some systems, the content of the ZIP file is blocked and the installer may fail to run. Before extracting it, right click on the ZIP file, select Properties, and click on the Unblock button if it is present in the lower right corner of the General tab in the properties dialog. This new release contains bug fixes and feature enhancements. There are some potential breaking changes in this release as some features of the Help File Builder have been moved into...Electricity, Gas and Temperature Monitoring with Netduino Plus: V1.0.1 Netduino Plus Monitoring: This is the first stable release from the Netduino Plus Monitoring program. Bugfixing The code is enhanced at some places in respect to the V0.6.1 version There is a possibility to add multiple S0 meters Website for realtime display of data Website for configuring the Netduino Comments are welcome! Additions will not be made to this version. This is the first and last major Netduino Plus V1 release. The new development will take place with the Netduino Plus V2 development board in mi...CRM 2011 Visual Ribbon Editor: Visual Ribbon Editor (1.3.1116.8): [FIX] Fixed issue not displaying CRM system button images correctly (incorrect path in file VisualRibbonEditor.exe.config)My Expenses Windows Store LOB App Demo: My Expenses Version 1: This is version 1 of the MyExpenses Windows 8 line of business demo app. The app is written in XAML and C#. It calls a WCF service that works with a SQL Server database. The app uses the Callisto toolkit. You can get it at https://github.com/timheuer/callisto. The Expenses.sql file contains the SQL to create the Expenses database. The ExpensesWCFService.zip file contains the WCF service, also written in C#. You should create a WCF service. Create an Entity Framework model and point it to...BlackJumboDog: Ver5.7.4: 2012.12.13 Ver5.7.4 (1)Web???????、???????????????????????????????????????????VFPX: ssClasses A1.0: My initial release. See https://vfpx.codeplex.com/wikipage?title=ssClasses&referringTitle=Home for a brief description of what is inside this releaseLayered Architecture Solution Guidance (LASG): LASG 1.0.0.8 for Visual Studio 2012: PRE-REQUISITES Open GAX (Please install Oct 4, 2012 version) Microsoft® System CLR Types for Microsoft® SQL Server® 2012 Microsoft® SQL Server® 2012 Shared Management Objects Microsoft Enterprise Library 5.0 (for the generated code) Windows Azure SDK (for layered cloud applications) Silverlight 5 SDK (for Silverlight applications) THE RELEASE This release only works on Visual Studio 2012. Known Issue If you choose the Database project, the solution unfolding time will be slow....Fiskalizacija za developere: FiskalizacijaDev 2.0: Prva prava produkcijska verzija - Zakon je tu, ova je verzija uskladena sa trenutno važecom Tehnickom specifikacijom (v1.2. od 04.12.2012.) i spremna je za produkcijsko korištenje. Verzije iza ove ce ovisiti o naknadnim izmjenama Zakona i/ili Tehnicke specifikacije, odnosno, o eventualnim greškama u radu/zahtjevima community-a za novim feature-ima. Novosti u v2.0 su: - That assembly does not allow partially trusted callers (http://fiskalizacija.codeplex.com/workitem/699) - scheme IznosType...Bootstrap Helpers: Version 1: First releaseDirectX Tool Kit: December 11, 2012: December 11, 2012 Ex versions of DDSTextureLoader and WICTextureLoader Removed use of ATL's CComPtr in favor of WRL's ComPtr for all platforms to support VS Express editions Updated VS 2010 project for official 'property sheet' integration for Windows 8.0 SDK Minor fix to CommonStates for Feature Level 9.1 Tweaked AlphaTestEffect.cpp to work around ARM NEON compiler codegen bug Added dxguid.lib as a default library for Debug builds to resolve GUID link issuesArcGIS Editor for OpenStreetMap: ArcGIS Editor for OSM 2.1 Final for 10.1: We are proud to announce the release of ArcGIS Editor for OpenStreetMap version 2.1. This download is compatible with ArcGIS 10.1, and includes setups for the Desktop Component, Desktop Component when 64 bit Background Geoprocessing is installed, and the Server Component. Important: if you already have ArcGIS Editor for OSM installed but want to install this new version, you will need to uninstall your previous version and then install this one. This release includes support for the ArcGIS 1...SharpCompress - a fully native C# library for RAR, 7Zip, Zip, Tar, GZip, BZip2: SharpCompress 0.8.2: This release just contains some fixes that have been done since the last release. Plus, this is strong named as well. I apologize for the lack of updates but my free time is less these days.New ProjectsAzke: New: Azke is a portal developed with ASP.NET MVC and MySQL. Old: Azke is a portal developed with ASP.net and MySQL.BasicallyNot Visual Studio 2010 Extension: "BasicallyNot" is a new Visual Studio 2010 Extension. It is designed to "drastically improve your VB.Net productivity", and of course make you think happy thoughts about cookies.Beautiful Code: These are collections of random code that I have written, which I believe are "beautiful" in some respects (algorithm, usage of language features etc.).bjyxl2: a csla project for myself.Buscayasminas: Buscayasminas is an open source "Minesweeper" alike game totally written in DHTML (JavaScript, CSS and HTML) that uses mouse and keyboard optionally. This cross-platform and cross-browser game was tested under BeOS, Linux, *BSD, Windows and others.Check if Knowledge Base fix is installed script: A handy script that checks if a knowledge base fix is installed or not.cnbeta: CNBETA ???????CSDN ??: CSDN????????IT??DateTime Class: DateTime Class with several methods: -NumberOfBusinessDaysFrom -IsWorkDay -NextBusinessDay -PreviousBusinessDayECSE6770: An web application for Software Engineering at RPI Hartford.Google+ for Windows Phone 7: Nothing here now.Koch Curve in Silverlight: This program generates the Koch curve using the Silverlight browser plugin.LINUX????????: LINUX????????longchang capture project: this is the project of longchang traffic police capture.Luna Programming Editor: Luna Programming Editor aims to be a simple but very functional, open source programming editor for developers who want to be more productive.markgrovestest: Azure TestMerge PDF Files: This class implement the merge of PDF filesMetroWeb: Metro web is a new modern web browser that provide a different experience for web browsing it just show any traditional web site as a metro designed websiteMinecraft 1.4.4 -- Learning Java: But a simple attempt at modding Minecraft over two different computers not on the same network.Nhóm CKT11: chia s? code nhóm ckt11Orchard.DecoratorField: Orchard Module to add new fieldsPhysic Engine: Physic EnginePixentration: UIS projectPomidoro: Windows store app: timer, which can be used in the application of 'Pomodoro Technique'.ROBO XERO Control: ROBO XERO ??????????????????????。ruc: Buscar en RUC de Paraguay.Send Email Class: Generic class to send emailsServiceProcessManagement: ?????SPMSeven Zip Wrapper: This small application which allows to call 7zip to create an archive, but skip compression for specific file extensions, which are usually already compressed.SharpShell: SharpShell is a .NET class library that lets you build Windows Shell Extensions using C# or VB.Silverseed.Core: Silverseed.Core is planned to be a common library for a variety of tools I'm planning to write, one of which is already available at Codeplex: [url:RepoCop|http://repocop.codeplex.com].Sistemas De Seguridad: integrantes jorge sara marieta douglassSomeTD: someSourPresser: komprese zdrojoveho kodu, zakodovani do B64 a oznaceni jako "nekompiluj" pro CIL kompilator. ....nekdy uzitecne.....The Curse: The Curse UO. Helping make the runUO community better.TIF Manipulation (Image): Tif Image Manipulation (Split, GetPage, Save Tif format...)Tiny Image Filters: This is a basic image processing library for Windows Phone. It is going to help developing photo effect app on Windows Phone.TrainGroup: This LightSwitch Project aims to be a simple management tool for any kind of training groups.Windows 7 Logon Tweaker: A Simple Software Used To Change The Logon Background Of Windows 7Windows Disguiser: Windows Disguiser is a little program that allows to automatically disguise minimized windows into the system tray.Windows Forms Metro: This project aims to create a library of controls & templates of Windows 8 Metro Style UI elements, for those who still using/loves windows forms.WPF Open Dialog: WPF Open Dialog is a simple and free open file/folder dialog for WPF using MVVM pattern. ???: ????????

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  • Kickstarter "last minute cold feet"

    - by mm24
    today I scheduled the publication of a video on kickstarter requesting approximately 5.000 $ in order to complete the iPhone shooter game I started 1 year ago after quitting my job. I invested more than 20.000$ in the game so far (for artwork, music, legal and accountant expenses) and I am now getting cold feet about my decision of publishing the video. The game is "nearly finished", in other words: the game mechanics are working but I still have some bugs to fix. Once I will have finished this (I hope will take me 1 or 2 weeks) I plan to start working on the actual level balancing (e.g. deciding the order of appearence of enemies for each level and balancing the number of hitpoints and strenght of bullets that the enemies have). Reasons for not publishing the video are: fear that the concept can be copied easily: the game is a shooter game set in a different environment (its a pretty cool one, believe me :)) and I am worried that someone might copy* the idea (I know, its the usual "I am worried story.."). A shooter game is one of the easiest game to implement and hence there will be hundreds game developer able to copy it by just adapting their existing code and changing graphics (not as straightforward). It took me one year to develop this because I was inexperienced plus there are approximately 6/7 months of work from the illustrator and there are 8 unique music tracks composed. The soundtrack of the video is the soundtrack of the game wich is not yet published and has not been deposited to a music society. I did create legally valid timestamps for the tracks and I am considering uploading the album on iTunes before publishing the video so I can have a certain publication date. But overall I am a bit scared and worried because I have never done this before and even the simple act of publishing an album requires me to read a long contract from the "aggregator company") which, even if I do have contracts with the musicians do worry me as I am not a U.S. resident and I am not familiar with the U.S. law system Reasons for publishing the video are: I almost run out of money (but this is not a real reason as I should have enough for one more month of development time) ...I kind of need extra money as, even if I do have money for 1 month of development I do not have money for marketing and for other expenses (e.g. accountant) It will create a fan base I could get some useful feedback from a wider range of beta testers It might create some pre-release buzz in case some blogger or game magazine likes the concept Anyone has had similar experiences? Is there a real risk that someone will copy the concept and implement it in a couple of months? Will the Kickstarter campaing be a good pre-release exposure for the gmae? Any refrences of similar projects/situations? Is it realistic that someone like ROVIO will copy the idea straight away?

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  • Interactive Master Detail Report Just A Few Minutes Away!

    - by kanichiro.nishida
    Oracle BI Publisher 11G have not just made Master Detail report development much easier and quicker, but also made it more interactive and fun without any coding or scripting. I’ve just created a short video that shows how to create such Master Detail report within a few minutes, so please take a look if you’re interested in!     With 11G, now you can create such report only with your browser very quickly and your report audience will be not only able to interact with the report but also able to view it in a pixel-perfect way with many different formats such as PDF, Excel, Word, PPT, etc. Happy Master Detail Reports development and design! Please share any feedback you have with Interactive Viewer and Layout Editor with us!

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  • SCCM2012 R2 – How to integrate MDT with SCCM

    - by Waclaw Chrabaszcz
    Originally posted on: http://geekswithblogs.net/Wchrabaszcz/archive/2013/11/12/sccm2012-r2--how-to-integrate-mdt-with-sccm.aspxThere are two maybe not competitive but parallel products: Microsoft Deployment Toolkit and System Center Configuration manager. Few years ago I was wondering why they are separate, I why I cannot share Task Sequences between them. And how it usually happens in live, when I was focused on other technologies, MDT and SCCM became best friends. Let's integrate MDT with SCCM: If first step you need to download MDT http://www.microsoft.com/en-us/download/details.aspx?id=25175 Install MDT on your SCCM server boxaccept the EULA Join CEIP if you like  Once you completed the installation I would recommend you to complete MDT configuring before integration with the SCCM. Start the Deployment Workbenchinstall updatesyou will need to download and install WAIKcreate new deployment shareleave default values Create MDT databaseMake sure you will create separate database, DO NOT use existing SCCM DB Now we are ready to integrate MDT with SCCMthe Integration tool should discover your server automaticallyAfter reopening SCCM console in task sequences you should have new cool features: How to use them? That's another story …

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  • Execute TSQL statement with ExecuteStoreQuery in entity framework 4.0

    - by Jalpesh P. Vadgama
    I was playing with entity framework in recent days and I was searching something that how we can execute TSQL statement in entity framework. And I have found one great way to do that with entity framework ‘ExecuteStoreQuery’ method. It’s executes a TSQL statement against data source given enity framework context and returns strongly typed result. You can find more information about ExcuteStoreQuery from following link. http://msdn.microsoft.com/en-us/library/dd487208.aspx So let’s examine how it works. So Let’s first create a table against which we are going to execute TSQL statement. So I have added a SQL Express database as following. Now once we are done with adding a database let’s add a table called Client like following. Here you can see above Client table is very simple. There are only two fields ClientId and ClientName where ClientId is primary key and ClientName is field where we are going to store client name. Now it’s time to add some data to the table. So I have added some test data like following. Now it’s time to add entity framework model class. So right click project->Add new item and select ADO.NET entity model as following. After clicking on add button a wizard will start it will ask whether we need to create model classes from database or not but we already have our client table ready so I have selected generate from database as following. Once you process further in wizard it will be presented a screen where we can select the our table like following. Now once you click finish it will create model classes with for us. Now we need a gridview control where we need to display those data. So in Default.aspx page I have added a grid control like following. <%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="EntityFramework._Default" %> <asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> </asp:Content> <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <h2> Welcome to ASP.NET! </h2> <p> To learn more about ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>. </p> <p> You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&amp;clcid=0x409" title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>. <asp:GridView ID="grdClient" runat="server"> </asp:GridView> </p> </asp:Content> Now once we are done with adding Gridview its time to write code for server side. So I have written following code in Page_load event of default.aspx page. protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { using (var context = new EntityFramework.TestEntities()) { ObjectResult<Client> result = context.ExecuteStoreQuery<Client>("Select * from Client"); grdClient.DataSource = result; grdClient.DataBind(); } } } Here in the above code you can see that I have written create a object of our entity model and then with the help of the ExecuteStoreQuery method I have execute a simple select TSQL statement which will return a object result. I have bind that object result with gridview to display data. So now we are done with coding.So let’s run application in browser. Following is output as expected. That’s it. Hope you like it. Stay tuned for more..Till then happy programming.

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  • Strategies for browser compatibility on web applications in a corporate environment

    - by TiagoBrenck
    With the new CSS 3 and HTML 5 technology, web applications have gained a lot of new tools for a better UI (user interface) interaction, beautiful templates and even responsive layout to fit into tablets and smartphones. Within a corporate environment, those new technologies are required so the company can "follow" the IT evolution and their concurrent, but they also want that those new web applications supports old browsers. How should I deal with this situation? By one side we are asked to follow the the evolution of technology, create responsive layouts and use a lot of cool jQuery plugins. On the other hand, we are asked to support old browsers that do not support those new responsive features, plugins or components. I would like advice and strategies on how to create "modern" web applications that are also supported on old browsers. How does your company deal with this situation? Is it possible to have the same web application run well and beautifully on old browsers, and be responsive and interactive on newer browsers?

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  • Launching mysql server: same permissions for root and for user

    - by toinbis
    Hi folks, have been directed here from stackoverflow here, am reposting the question and adding my.cnf at the end of a post. so far in my 10+ years experience with linux, all the permission problems I've ever encountered, have been successfully solved with chmod -R 777 /path/where/the/problem/has/occured (every lie has a grain of truth in it :) This time the trick doesn't work, so I'm turning to you for help. I'm compiling mysql server from scratch with zc.buildout (www . buildout . org). I do launch it by executing /home/toinbis/.../parts/mysql/bin/mysqld_safe, this works. The thing is that i'll be launching this from within supervisor (supervisord . org) script, and when used on the deployment server, it'll need it to be launched with root permissions(so that nginx server, launched with the same script, would have access to 80 port). The problem is that sudo /home/toinbis/.../parts/mysql/bin/mysqld_safe, fails, generating the error, posted bellow, in mysql error log (apache and nginx works as expected). http://lists.mysql.com/mysql/216045 suggests, that "there are two errors: A missing table and a file system that mysqld doesn't have access to". Mysqldatadir and all the mysql server binary files has 777 permissions, talbe mysql.plugin does exist and has 777 permissions (why Can't open the mysql.plugin table?), "sudo touch mysql_datadir/tmp/file" does create file (why Can't create/write to file /home/toinbis/.../runtime/mysql_datadir/tmp/ib4e9Huz?). chgrp -R mysql mysql_datadir and adding "root, toinbis, mysql" users to mysql group ( cat /etc/group | grep mysql outputs mysql:x:124:root,toinbis,mysql) has no effect - when i launch it as a casual user, it starts, when as a root - it fails. Does mysql server, even started as root, tries to operate as other, let's say, 'mysql' user? but even in that case, adding mysql user to mysql group and making all the mysql_datadirs files belong to mysql group should make things work smoothly. I do know that it might be a better idea to simply to launch one the nginx as root and mysql - as just a user, but this error irritated me enough so to devote enough energy so not to only "make things work", but to also make things work exactly as i wanted it initially, so to have a proof of concept that it's possible. and this is the generated error: 091213 20:02:55 mysqld_safe Starting mysqld daemon with databases from /home/toinbis/.../runtime/mysql_datadir /home/toinbis/.../parts/mysql/libexec/mysqld: Table 'plugin' is read only 091213 20:02:55 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. /home/toinbis/.../parts/mysql/libexec/mysqld: Can't create/write to file '/home/toinbis/.../runtime/mysql_datadir/tmp/ib4e9Huz' (Errcode: 13) 091213 20:02:55 InnoDB: Error: unable to create temporary file; errno: 13 091213 20:02:55 [ERROR] Plugin 'InnoDB' init function returned error. 091213 20:02:55 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 091213 20:02:55 [ERROR] Can't start server : Bind on unix socket: Permission denied 091213 20:02:55 [ERROR] Do you already have another mysqld server running on socket: /home/toinbis/.../runtime/var/pids/mysql.sock ? 091213 20:02:55 [ERROR] Aborting 091213 20:02:55 [Note] /home/toinbis/.../parts/mysql/libexec/mysqld: Shutdown complete 091213 20:02:55 mysqld_safe mysqld from pid file /home/toinbis/.../runtime/var/pids/mysql.pid ended My my.cnf (the basedir and datadir(including tempdir) have chmod -R 777 permissions) : [client] socket = /home/toinbis/.../runtime/var/pids/mysql.sock port = 8002 [mysqld_safe] socket = /home/toinbis/.../runtime/var/pids/mysql.sock nice = 0 [mysqld] # # * Basic Settings # socket = /home/toinbis/.../runtime/var/pids/mysql.sock port = 8002 pid-file = /home/toinbis/.../runtime/var/pids/mysql.pid basedir = /home/toinbis/.../parts/mysql datadir = /home/toinbis/.../runtime/mysql_datadir tmpdir = /home/toinbis/.../runtime/mysql_datadir/tmp skip-external-locking bind-address = 127.0.0.1 log-error =/home/toinbis/.../runtime/logs/mysql_errorlog # # * Fine Tuning # key_buffer = 16M max_allowed_packet = 32M thread_stack = 128K thread_cache_size = 8 myisam-recover = BACKUP #max_connections = 100 #table_cache = 64 #thread_concurrency = 10 # # * Query Cache Configuration # query_cache_limit = 1M query_cache_size = 16M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. #log = /home/toinbis/.../runtime/logs/mysql_logs/mysql.log # # Error logging goes to syslog. This is a Debian improvement :) # # Here you can see queries with especially long duration #log_slow_queries = /home/toinbis/.../runtime/logs/mysql_logs/mysql-slow.log #long_query_time = 2 #log-queries-not-using-indexes # # The following can be used as easy to replay backup logs or for replication. #server-id = 1 #log_bin = /home/toinbis/.../runtime/mysql_datadir/mysql-bin.log #binlog_format = ROW #read_only = 0 #expire_logs_days = 10 #max_binlog_size = 100M #sync_binlog = 1 #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name # # * InnoDB # innodb_data_file_path = ibdata1:10M:autoextend innodb_buffer_pool_size=64M innodb_log_file_size=16M innodb_log_buffer_size=8M innodb_flush_log_at_trx_commit=1 innodb_file_per_table innodb_locks_unsafe_for_binlog=1 [mysqldump] quick quote-names max_allowed_packet = 32M [mysql] #no-auto-rehash # faster start of mysql but no tab completion [isamchk] key_buffer = 16M Any ideas much appreciated! regards, to P.S. sorry for messy hyperlinks, it's my first post and anti-spam feature of SF doesn't allow to post them properly :)

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  • New Process For Receiving Oracle Certification Exam Results

    - by Brandye Barrington
    On November 15, 2012, Oracle Certification exam results will be available directly from Oracle's certification portal, CertView. After completing an exam at a testing center, you will login to CertView to access and print your exam scores by selecting the See My New Exam Results Now link or the Print My New Exam Results Now link from the homepage. This will provide access to all certification and exam history in one place through Oracle, providing tighter integration with other activities at Oracle. This change in policy will also increase security around data privacy. AUTHENTICATE YOUR CERTVIEW ACCOUNT NOW One very important step you must take is to authenticate your CertView account BEFORE taking your exam. This way, if there are any issues with authorization, you have time to get these sorted out before testing. Keep in mind that it can take up to 3 business days for a CertView account to be manually authenticated, so completing this process before testing is key! You will need to create a web account at PearsonVUE prior to registering for your exam and you will need to create an Oracle Web Account prior to authenticating your CertView account. The CertView account will be available for authentication within 30 minutes of creating a Pearson VUE web account at certview.oracle.com. GETTING YOUR EXAM RESULTS FROM ORACLE Before taking the scheduled exam, you should authenticate your account at certview.oracle.com using the email address and Oracle Testing ID in your Pearson VUE profile. You will be required to have an Oracle Web Account to authenticate your CertView account. After taking the exam, you will receive an email from Oracle indicating that your exam results are available at certview.oracle.com If you have previously authenticated your CertView account, you will simply click on the link in the email, which will take you to CertView, login and select See My New Exam Results Now. If you have not authenticated your CertView account before receiving this notification email, you will be required to authenticate your CertView account before accessing your exam results. Authentication requires an Oracle Web Account user name and password and the following information from your Pearson VUE profile: email address and Oracle Testing ID. Click on the link in the email to authenticate your CertView account You will be given the option to create an Oracle Web Account if you do no already have one.  After account authentication, you will be able to login to CertView and select See My New Exam Results Now to view your exam results or Print My New Exam Results Now to print your exam results. As always, if you need assistance with your CertView account, please contact Oracle Certification Support. YOUR QUESTIONS ANSWERED More Information FAQ: Receiving Exam Scores FAQ: How Do I Log Into CertView? FAQ: How To Get Exam Results FAQ: Accessing Exam Results in CertView FAQ: How Will I Know When My Exam Results Are Available? FAQ: What If I Don't Get An Exam Results Email Alert? FAQ: How To Download and Print Exam Score Reports FAQ: What If I Think My Exam Results Are Wrong In CertView? FAQ: Is Oracle Changing The Way That Exams Are Scored?

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  • Performing a clean database creation using msbuild

    - by Robert May
    So I’m taking a break from writing about other Agile stuff for a post. :)  I’m still going to get back to the other subjects, but this is fun too. Something I’ve done quite a bit of is MSBuild and CI work.  I’m experimenting with ways to improve what I’ve done in the past, particularly around database CI. Today, I developed a mechanism for starting from scratch with your database.  By scratch, I mean blowing away the existing database and creating it again from a single command line call.  I’m a firm believer that developers should be able to get to a known clean state at the database level with a single command and that they should be operating off of their own isolated database to improve productivity.  These scripts will help that. Here’s how I did it.  First, we have to disconnect users.  I did so using the help of a script from sql server central.  Note that I’m using sqlcmd variable replacement. -- kills all the users in a particular database -- dlhatheway/3M, 11-Jun-2000 declare @arg_dbname sysname declare @a_spid smallint declare @msg varchar(255) declare @a_dbid int set @arg_dbname = '$(DatabaseName)' select @a_dbid = sdb.dbid from master..sysdatabases sdb where sdb.name = @arg_dbname declare db_users insensitive cursor for select sp.spid from master..sysprocesses sp where sp.dbid = @a_dbid open db_users fetch next from db_users into @a_spid while @@fetch_status = 0 begin select @msg = 'kill '+convert(char(5),@a_spid) print @msg execute (@msg) fetch next from db_users into @a_spid end close db_users deallocate db_users GO Once all users are booted from the database, we can commence with recreating the database.  I generated the script that is used to create a database from SQL Server management studio, so I’m only going to show the bits that weren’t generated that are important.  There are a bunch of Alter Database statements that aren’t shown. First, I had to find the default location of the database files in the install, since they can be in many different locations.  I used Method 1 from a technet blog and then modified it a bit to do what I needed to do.  I ended up using dynamic SQL because for the life of me, I couldn’t get the “Filename” property to not return an error when I used anything besides a string.  I’m dropping the database first, if it exists.  Here’s the code:   IF EXISTS(SELECT 1 FROM [master].[sys].[databases] WHERE [name] = N'$(DatabaseName)') BEGIN drop database $(DatabaseName) END; go IF EXISTS(SELECT 1 FROM [master].[sys].[databases] WHERE [name] = 'zzTempDBForDefaultPath') BEGIN DROP DATABASE zzTempDBForDefaultPath END; -- Create temp database. Because no options are given, the default data and --- log path locations are used CREATE DATABASE zzTempDBForDefaultPath; DECLARE @Default_Data_Path VARCHAR(512), @Default_Log_Path VARCHAR(512); --Get the default data path SELECT @Default_Data_Path = ( SELECT LEFT(physical_name,LEN(physical_name)-CHARINDEX('\',REVERSE(physical_name))+1) FROM sys.master_files mf INNER JOIN sys.[databases] d ON mf.[database_id] = d.[database_id] WHERE d.[name] = 'zzTempDBForDefaultPath' AND type = 0); --Get the default Log path SELECT @Default_Log_Path = ( SELECT LEFT(physical_name,LEN(physical_name)-CHARINDEX('\',REVERSE(physical_name))+1) FROM sys.master_files mf INNER JOIN sys.[databases] d ON mf.[database_id] = d.[database_id] WHERE d.[name] = 'zzTempDBForDefaultPath' AND type = 1); --Clean up. IF EXISTS(SELECT 1 FROM [master].[sys].[databases] WHERE [name] = 'zzTempDBForDefaultPath') BEGIN DROP DATABASE zzTempDBForDefaultPath END; DECLARE @SQL nvarchar(max) SET @SQL= 'CREATE DATABASE $(DatabaseName) ON PRIMARY ( NAME = N''$(DatabaseName)'', FILENAME = N''' + @Default_Data_Path + N'$(DatabaseName)' + '.mdf' + ''', SIZE = 2048KB , FILEGROWTH = 1024KB ) LOG ON ( NAME = N''$(DatabaseName)Log'', FILENAME = N''' + @Default_Log_Path + N'$(DatabaseName)' + '.ldf' + ''', SIZE = 1024KB , FILEGROWTH = 10%) ' exec (@SQL) GO And with that, your database is created.  You can run these scripts on any server and on any database name.  To do that, I created an MSBuild script that looks like this: <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0"> <PropertyGroup> <DatabaseName>MyDatabase</DatabaseName> <Server>localhost</Server> <SqlCmd>sqlcmd -v DatabaseName=$(DatabaseName) -S $(Server) -i </SqlCmd> <ScriptDirectory>.\Scripts</ScriptDirectory> </PropertyGroup> <Target Name ="Rebuild"> <ItemGroup> <ScriptFiles Include="$(ScriptDirectory)\*.sql"/> </ItemGroup> <Exec Command="$(SqlCmd) &quot;%(ScriptFiles.Identity)&quot;" ContinueOnError="false"/> </Target> </Project> Note that the Scripts directory is underneath the directory where I’m running the msbuild command and is relative to that directory.  Note also that the target is using batching to run each script in the scripts subdirectory, one after the other.  Each script is passed to the sqlcmd command line execution using the .Identity property on the itemgroup that is created.  This target file is saved in the file “Database.target”. To make this work, you’ll need msbuild in your path, and then run the following command: msbuild database.target /target:Rebuild Once you’ve got your virgin database setup, you’d then need to use a tool like dbdeploy.net to determine that it was a virgin database, build a change script based on the change scripts, and then you’d want another sqlcmd call to update the database with the appropriate scripts.  I’m doing that next, so I’ll post a blog update when I’ve got it working. Technorati Tags: MSBuild,Agile,CI,Database

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  • Working with Reporting Services Filters–Part 1

    - by smisner
    There are two ways that you can filter data in Reporting Services. The first way, which usually provides a faster performance, is to use query parameters to apply a filter using the WHERE clause in a SQL statement. In that case, the structure of the filter depends upon the syntax recognized by the source database. Another way to filter data in Reporting Services is to apply a filter to a dataset, data region, or a group. Using this latter method, you can even apply multiple filters. However, the use of filter operators or the setup of multiple filters is not always obvious, so in this series of posts, I'll provide some more information about the configuration of filters. First, why not use query parameters exclusively for filtering? Here are a few reasons: You might want to apply a filter to part of the report, but not all of the report. Your dataset might retrieve data from a stored procedure, and doesn't allow you to pass a query parameter for filtering purposes. Your report might be set up as a snapshot on the report server and, in that case, cannot be dynamically filtered based on a query parameter. Next, let's look at how to set up a report filter in general. The process is the same whether you are applying the filter to a dataset, data region, or a group. When you go to the Filters page in the Properties dialog box for whichever of these items you selected (dataset, data region, group), you click the Add button to create a new filter. The interface looks like this: The Expression field is usually a field in the dataset, so to make it easier for you to make a selection,the drop-down list displays all of the current dataset fields. But notice the expression button to the right, which means that you can set up any type of expression-not just a dataset field. To the right of the expression button, you'll find a data type drop-down list. It's important to specify the correct data type for the field or expression you're using. Now for the operators. Here's a list of the options that you have: This Operator Performs This Action =, <>, >, >=, <, <=, Like Compares expression to value Top N, Bottom N Compares expression to Top (Bottom) set of N values (N = integer) Top %, Bottom % Compares expression to Top (Bottom) N percent of values (N = integer or float) Between Determines whether expression is between two values, inclusive In Determines whether expression is found in list of values Last, the Value is what you're comparing to the expression using the operator. The construction of a filter using some operators (=, <>, >, etc.) is fairly simple. If my dataset (for AdventureWorks data) has a Category field, and I have a parameter that prompts the user for a single category, I can set up a filter like this: Expression Data Type Operator Value [Category] Text = [@Category] But if I set the parameter to accept multiple values, I need to change the operator from = to In, just as I would have to do if I were using a query parameter. The parameter expression, [@Category], which translates to =Parameters!Category.Value, doesn’t need to change because it represents an array as soon as I change the parameter to allow multiple values. The “In” operator requires an array. With that in mind, let’s consider a variation on Value. Let’s say that I have a parameter that prompts the user for a particular year – and for simplicity’s sake, this parameter only allows a single value, and I have an expression that evaluates the previous year based on the user’s selection. Then I want to use these two values in two separate filters with an OR condition. That is, I want to filter either by the year selected OR by the year that was computed. If I create two filters, one for each year (as shown below), then the report will only display results if BOTH filter conditions are met – which would never be true. Expression Data Type Operator Value [CalendarYear] Integer = [@Year] [CalendarYear] Integer = =Parameters!Year.Value-1 To handle this scenario, we need to create a single filter that uses the “In” operator, and then set up the Value expression as an array. To create an array, we use the Split function after creating a string that concatenates the two values (highlighted in yellow) as shown below. Expression Data Type Operator Value =Cstr(Fields!CalendarYear.Value) Text In =Split( CStr(Parameters!Year.Value) + ”,” + CStr(Parameters!Year.Value-1) , “,”) Note that in this case, I had to apply a string conversion on the year integer so that I could concatenate the parameter selection with the calculated year. Pay attention to the second argument of the Split function—you must use a comma delimiter for the result to work correctly with the In operator. I also had to change the Expression value from [CalendarYear] (or =Fields!CalendarYear.Value) so that the expression would return a string that I could compare with the values in the string array. More fun with filter expressions in future posts!

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  • How to Automatically Backup Your Gmail Attachments With IFTTT

    - by Mark Wilson
    When it comes to getting things done quickly, automation is the name of the game. We’ve looked at IFTTT before, and a new batch of updates has introduced a number of options that can be used to automatically do things with files that are sent to your Gmail address. What could this be used for? Well the most obvious starting point is to simply create a backup of any files that you receive via email. This is useful if you find that you often reach the size limit for your inbox as it enables you to delete emails without having to worry about losing the associated files. Start by paying a visit to the IFTTT website and then either sign into an existing account or create a new one.     

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  • Why am I getting this error : "ExecuteReader: Connection property has not been initialized." [migrated]

    - by Olga
    I'm trying to read .csv file to import its contents to SQL table I'm getting error: ExecuteReader: Connection property has not been initialized. at the last line of this code: Function ImportData(ByVal FU As FileUpload, ByVal filename As String, ByVal tablename As String) As Boolean Try Dim xConnStr As String = "Driver={Microsoft Text Driver (*.txt; *.csv)};dbq=" & Path.GetDirectoryName(Server.MapPath(filename)) & ";extensions=asc,csv,tab,txt;" ' create your excel connection object using the connection string Dim objXConn As New System.Data.Odbc.OdbcConnection(xConnStr.Trim()) objXConn.Open() Dim objCommand As New OdbcCommand(String.Format("SELECT * FROM " & Path.GetFileName(Server.MapPath(filename)), objXConn)) If objXConn.State = ConnectionState.Closed Then objXConn.Open() Else objXConn.Close() objXConn.Open() End If ' create a DataReader Dim dr As OdbcDataReader dr = objCommand.ExecuteReader()

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  • Voxel Engine in Multiplayer?

    - by Oliver Schöning
    This is a question more out of Interest for now, because I am not even near to the point that I could create this project at the moment. I really like the progress on the Atomontage Engine. A Voxel engine that is WIP at the moment. I would like to create a Voxel SERVER eventually. First in JavaScript (That's what I am learning right now) later perhaps in C++ for speed. Remember, I am perfectly aware that this is very hard! This is a brainstorm for the next 10 years as for now. What I would like to achieve one day is a Multiplayer Game in the Browser where the voxels positions are updated by XYZ input from the server. The Browser Does only 3 things: sending player input to the server, updating Voxel positions send from the server and rendering the world. I imagine using something like the Three.js libary on the client side. So that would be my programming dream right there... Now to something simpler for the near future. Right now I am learning javascript. And I am making games with Construct2. (A really cool JavaScript "game maker") The plan is to create a 2D Voxel enviorment (Block Voxels) on the Socket.IO Server* and send the position of the Voxels and Players to the Client side which then positions the Voxel Blocks to the Server Output coordinates. I think that is a bit more manageable then the other bigger idea. And also there should be no worries about speed with this type of project in JavaScript (I hope). Extra Info: *I am using nodejs (Without really knowing what it does besides making Socket.IO work) So now some questions: Is the "dream project" doable in JavaScript? Or is C++ just the best option because it does not take as long to be interpreted at run time like JavaScript? What are the limitations? I can think of some: Need of a Powerful server depending on how much information the server has to process. Internet Speed; Sending the data of the Voxel positions to every player could add up being very high! The browser FPS might go down quickly if rendering to many objects. One way of fixing reducing the packages Could be to let the browser calculate some of the Voxel positions from Several Values. But that would slow down the Client side too. What about the more achievable project? I am almost 100% convinced that this is possible in JavaScript, and that there are several ways of doing this. This is just XY position Updating for now.. Hope this did make some sense. Please comment if you got something to say :D

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  • Audiencing with Forms-Based Authentication (FBA)

    - by PeterBrunone
    This really is no different from when you create an audience with regular old NTLM (Windows Authentication).  The difference is that while the AD provider is set up by default in all environments, the extra membership provider (that you use for Forms Authentication) isn't included anywhere except in the web application where you install it.  To be able to find your FBA users in the audience creation tool, you'll need to add the extra membership provider(s) to the web.config for your SSP site in IIS.  At that point, the People Picker should start recognizing your Forms Auth users, and you can create your audience as needed.

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  • Free E-Book - TypeScript Succinctly

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/06/22/free-e-book---typescript-succinctly.aspxAt http://www.syncfusion.com/resources/techportal/ebooks/typescript, Syncfusion are a free E-book "TypeScript Succinctly""The extensive adoption of JavaScript for application development, and the ability to use HTML and JavaScript to create Windows Store apps, led Microsoft to develop TypeScript, a superset of JavaScript. Though the messiness of JavaScript causes many .NET developers to avoid the language, Microsoft's additions extend many familiar features of .NET programming to JavaScript. With TypeScript Succinctly by Steve Fenton, you will learn how TypeScript provides optional static typing and classes to JavaScript development, how to create and load modules, and how to work with existing JavaScript libraries through ambient declarations. TypeScript is even significantly integrated with Visual Studio to provide the autocompletion and type checking you are most comfortable with."

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  • Windows Workflow Foundation (WF) and things I wish were more intuitive

    - by pjohnson
    I've started using Windows Workflow Foundation, and so far ran into a few things that aren't incredibly obvious. Microsoft did a good job of providing a ton of samples, which is handy because you need them to get anywhere with WF. The docs are thin, so I've been bouncing between samples and downloadable labs to figure out how to implement various activities in a workflow. Code separation or not? You can create a workflow and activity in Visual Studio with or without code separation, i.e. just a .cs "Component" style object with a Designer.cs file, or a .xoml XML markup file with code behind (beside?) it. Absence any obvious advantage to one or the other, I used code separation for workflows and any complex custom activities, and without code separation for custom activities that just inherit from the Activity class and thus don't have anything special in the designer. So far, so good. Workflow Activity Library project type - What's the point of this separate project type? So far I don't see much advantage to keeping your custom activities in a separate project. I prefer to have as few projects as needed (and no fewer). The Designer's Toolbox window seems to find your custom activities just fine no matter where they are, and the debugging experience doesn't seem to be any different. Designer Properties - This is about the designer, and not specific to WF, but nevertheless something that's hindered me a lot more in WF than in Windows Forms or elsewhere. The Properties window does a good job of showing you property values when you hover the mouse over the values. But they don't do the same to find out what a control's type is. So maybe if I named all my activities "x1" and "x2" instead of helpful self-documenting names like "listenForStatusUpdate", then I could easily see enough of the type to determine what it is, but any names longer than those and all I get of the type is "System.Workflow.Act" or "System.Workflow.Compone". Even hitting the dropdown doesn't expand any wider, like the debugger quick watch "smart tag" popups do when you scroll through members. The only way I've found around this in VS 2008 is to widen the Properties dialog, losing precious designer real estate, then shrink it back down when you're done to see what you were doing. Really? WF Designer - This is about the designer, and I believe is specific to WF. I should be able to edit the XML in a .xoml file, or drag and drop using the designer. With WPF (at least in VS 2010 Ultimate), these are side by side, and changes to one instantly update the other. With WF, I have to right-click on the .xoml file, choose Open With, and pick XML Editor to edit the text. It looks like this is one way where WF didn't get the same attention WPF got during .NET Fx 3.0 development. Service - In the WF world, this is simply a class that talks to the workflow about things outside the workflow, not to be confused with how the term "service" is used in every other context I've seen in the Windows and .NET world, i.e. an executable that waits for events or requests from a client and services them (Windows service, web service, WCF service, etc.). ListenActivity - Such a great concept, yet so unintuitive. It seems you need at least two branches (EventDrivenActivity instances), one for your positive condition and one for a timeout. The positive condition has a HandleExternalEventActivity, and the timeout has a DelayActivity followed by however you want to handle the delay, e.g. a ThrowActivity. The timeout is simple enough; wiring up the HandleExternalEventActivity is where things get fun. You need to create a service (see above), and an interface for that service (this seems more complex than should be necessary--why not have activities just wire to a service directly?). And you need to create a custom EventArgs class that inherits from ExternalDataEventArgs--you can't create an ExternalDataEventArgs event handler directly, even if you don't need to add any more information to the event args, despite ExternalDataEventArgs not being marked as an abstract class, nor a compiler error nor warning nor any other indication that you're doing something wrong, until you run it and find that it always times out and get to check every place mentioned here to see why. Your interface and service need an event that consumes your custom EventArgs class, and a method to fire that event. You need to call that method from somewhere. Then you get to hope that you did everything just right, or that you can step through code in the debugger before your Delay timeout expires. Yes, it's as much fun as it sounds. TransactionScopeActivity - I had the bright idea of putting one in as a placeholder, then filling in the database updates later. That caused this error: The workflow hosting environment does not have a persistence service as required by an operation on the workflow instance "[GUID]". ...which is about as helpful as "Object reference not set to an instance of an object" and even more fun to debug. Google led me to this Microsoft Forums hit, and from there I figured out it didn't like that the activity had no children. Again, a Validator on TransactionScopeActivity would have pointed this out to me at design time, rather than handing me a nearly useless error at runtime. Easily enough, I disabled the activity and that fixed it. I still see huge potential in my work where WF could make things easier and more flexible, but there are some seriously rough edges at the moment. Maybe I'm just spoiled by how much easier and more intuitive development elsewhere in the .NET Framework is.

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  • Introduction to LinqPad Driver for StreamInsight 2.1

    - by Roman Schindlauer
    We are announcing the availability of the LinqPad driver for StreamInsight 2.1. The purpose of this blog post is to offer a quick introduction into the new features that we added to the StreamInsight LinqPad driver. We’ll show you how to connect to a remote server, how to inspect the entities present of that server, how to compose on top of them and how to manage their lifetime. Installing the driver Info on how to install the driver can be found in an earlier blog post here. Establishing connections As you click on the “Add Connection” link in the left pane you will notice that now it’s possible to build the data context automatically. The new driver appears as an option in the upper list, and if you pick it you will open a connection dialog that lets you connect to a remote StreamInsight server. The connection dialog lets you specify the address of the remote server. You will notice that it’s possible to pick up the binding information from the configuration file of the LinqPad application (which is normally in the same folder as LinqPad.exe and is called LinqPad.exe.config). In order for the context to be generated you need to pick an application from the server. The control is editable hence you can create a new application if you don’t want to make changes to an existing application. If you choose a new application name you will be prompted for confirmation before this gets created. Once you click OK the connection is created and you can start issuing queries against the remote server. If there’s any connectivity error the connection is marked with a red X and you can see the error message informing you what went wrong (i.e., the remote server could not be reached etc.). The context for remote servers Let’s take a look at what happens after we are connected successfully. Every LinqPad query runs inside a context – think of it as a class that wraps all the code that you’re writing. If you’re connecting to a live server the context will contain the following: The application object itself. All entities present in this application (sources, sinks, subjects and processes). The picture below shows a snapshot of the left pane of LinqPad after a successful connection. Every entity on the server has a different icon which will allow users to figure out its purpose. You will also notice that some entities have a string in parentheses following the name. It should be interpreted as such: the first name is the name of the property of the context class and the second name is the name of the entity as it exists on the server. Not all valid entity names are valid identifier names so in cases where we had to make a transformation you see both. Note also that as you hover over the entities you get IntelliSense with their types – more on that later. Remoting is not supported As you play with the entities exposed by the context you will notice that you can’t read and write directly to/from them. If for instance you’re trying to dump the content of an entity you will get an error message telling you that in the current version remoting is not supported. This is because the entity lives on the remote server and dumping its content means reading the events produced by this entity into the local process. ObservableSource.Dump(); Will yield the following error: Reading from a remote 'System.Reactive.Linq.IQbservable`1[System.Int32]' is not supported. Use the 'Microsoft.ComplexEventProcessing.Linq.RemoteProvider.Bind' method to read from the source using a remote observer. This basically tells you that you can call the Bind() method to direct the output of this source to a sink that has to be defined on the remote machine as well. You can’t bring the results to the LinqPad window unless you write code specifically for that. Compose queries You may ask – what's the purpose of all that? After all the same information is present in the EventFlowDebugger, why bother with showing it in LinqPad? First of all, What gets exposed in LinqPad is not what you see in the debugger. In LinqPad we have a property on the context class for every entity that lives on the server. Because LinqPad offers IntelliSense we in fact have much more information about the entity, and more importantly we can compose with that entity very easily. For example, let’s say that this code creates an entity: using (var server = Server.Connect(...)) {     var a = server.CreateApplication("WhiteFish");     var src = a         .DefineObservable<int>(() => Observable.Range(0, 3))         .Deploy("ObservableSource"); If later we want to compose with the source we have to fetch it and then we can bind something to     a.GetObservable<int>("ObservableSource)").Bind(... This means that we had to know a bunch of things about this: that it’s a source, that it’s an observable, it produces a result with payload Int32 and it’s named “ObservableSource”. Only the second and last bits of information are present in the debugger, by the way. As you type in the query window you see that all the entities are present, you get IntelliSense support for them and it’s much easier to make sense of what’s available. Let’s look at a scenario where composition is plausible. With the new programming model it’s possible to create “cold” sources that are parameterized. There was a way to accomplish that even in the previous version by passing parameters to the adapters, but this time it’s much more elegant because the expression declares what parameters are required. Say that we hover the mouse over the ThrottledSource source – we will see that its type is Func<int, int, IQbservable<int>> - this in effect means that we need to pass two int parameters before we can get a source that produces events, and the type for those events is int – in the particular case of my example I had the source produce a range of integers and the two parameters were the start and end of the range. So we see how a developer can create a source that is not running yet. Then someone else (e.g. an administrator) can pass whatever parameters appropriate and run the process. Proxy Types Here’s an interesting scenario – what if someone created a source on a server but they forgot to tell you what type they used. Worse yet, they might have used an anonymous type and even though they can refer to it by name you can’t figure out how to use that type. Let’s walk through an example that shows how you can compose against types you don’t need to have the definition of. This is how we can create a source that returns an anonymous type: Application.DefineObservable(() => Observable.Range(1, 10).Select(i => new { I = i })).Deploy("O1"); Now if we refresh the connection we can see the new source named O1 appear in the list. But what’s more important is that we now have a type to work with. So we can compose a query that refers to the anonymous type. var threshold = new StreamInsightDynamicDriver.TypeProxies.AnonymousType1_0<int>(5); var filter = from i in O1              where i > threshold              select i; filter.Deploy("O2"); You will notice that the anonymous type defined with this statement: new { I = i } can now be manipulated by a client that does not have access to it because the LinqPad driver has generated another type in its stead, named StreamInsightDynamicDriver.TypeProxies.AnonymousType1_0. This type has all the properties and fields of the type defined on the server, except in this case we can instantiate values and use it to compose more queries. It is worth noting that the same thing works for types that are not anonymous – the test is if the LinqPad driver can resolve the type or not. If it’s not possible then a new type will be generated that approximates the type that exists on the server. Control metadata In addition to composing processes on top of the existing entities we can do other useful things. We can delete them – nothing new here as we simply access the entities through the Entities collection of the application class. Here is where having their real name in parentheses comes handy. There’s another way to find out what’s behind a property – dump its expression. The first line in the output tells us what’s the name of the entity used to build this property in the context. Runtime information So let’s create a process to see what happens. We can bind a source to a sink and run the resulting process. If you right click on the connection you can refresh it and see the process present in the list of entities. Then you can drag the process to the query window and see that you can have access to process object in the Processes collection of the application. You can then manipulate the process (delete it, read its diagnostic view etc.). Regards, The StreamInsight Team

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