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  • Big Data – Buzz Words: What is Hadoop – Day 6 of 21

    - by Pinal Dave
    In yesterday’s blog post we learned what is NoSQL. In this article we will take a quick look at one of the four most important buzz words which goes around Big Data – Hadoop. What is Hadoop? Apache Hadoop is an open-source, free and Java based software framework offers a powerful distributed platform to store and manage Big Data. It is licensed under an Apache V2 license. It runs applications on large clusters of commodity hardware and it processes thousands of terabytes of data on thousands of the nodes. Hadoop is inspired from Google’s MapReduce and Google File System (GFS) papers. The major advantage of Hadoop framework is that it provides reliability and high availability. What are the core components of Hadoop? There are two major components of the Hadoop framework and both fo them does two of the important task for it. Hadoop MapReduce is the method to split a larger data problem into smaller chunk and distribute it to many different commodity servers. Each server have their own set of resources and they have processed them locally. Once the commodity server has processed the data they send it back collectively to main server. This is effectively a process where we process large data effectively and efficiently. (We will understand this in tomorrow’s blog post). Hadoop Distributed File System (HDFS) is a virtual file system. There is a big difference between any other file system and Hadoop. When we move a file on HDFS, it is automatically split into many small pieces. These small chunks of the file are replicated and stored on other servers (usually 3) for the fault tolerance or high availability. (We will understand this in the day after tomorrow’s blog post). Besides above two core components Hadoop project also contains following modules as well. Hadoop Common: Common utilities for the other Hadoop modules Hadoop Yarn: A framework for job scheduling and cluster resource management There are a few other projects (like Pig, Hive) related to above Hadoop as well which we will gradually explore in later blog posts. A Multi-node Hadoop Cluster Architecture Now let us quickly see the architecture of the a multi-node Hadoop cluster. A small Hadoop cluster includes a single master node and multiple worker or slave node. As discussed earlier, the entire cluster contains two layers. One of the layer of MapReduce Layer and another is of HDFC Layer. Each of these layer have its own relevant component. The master node consists of a JobTracker, TaskTracker, NameNode and DataNode. A slave or worker node consists of a DataNode and TaskTracker. It is also possible that slave node or worker node is only data or compute node. The matter of the fact that is the key feature of the Hadoop. In this introductory blog post we will stop here while describing the architecture of Hadoop. In a future blog post of this 31 day series we will explore various components of Hadoop Architecture in Detail. Why Use Hadoop? There are many advantages of using Hadoop. Let me quickly list them over here: Robust and Scalable – We can add new nodes as needed as well modify them. Affordable and Cost Effective – We do not need any special hardware for running Hadoop. We can just use commodity server. Adaptive and Flexible – Hadoop is built keeping in mind that it will handle structured and unstructured data. Highly Available and Fault Tolerant – When a node fails, the Hadoop framework automatically fails over to another node. Why Hadoop is named as Hadoop? In year 2005 Hadoop was created by Doug Cutting and Mike Cafarella while working at Yahoo. Doug Cutting named Hadoop after his son’s toy elephant. Tomorrow In tomorrow’s blog post we will discuss Buzz Word – MapReduce. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Big Data, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • Silverlight Cream for March 13, 2011 -- #1059

    - by Dave Campbell
    In this Issue: András Velvárt, WIndowsPhoneGeek(-2-), Jesse Liberty(-2-), Victor Gaudioso, Kunal Chowdhury, Jeremy Likness, Michael Crump, and Dhananjay Kumar. Above the Fold: Silverlight: "Application Library Caching in Silverlight 4" Kunal Chowdhury WP7: "Handling WP7 orientation changes via Visual States" András Velvárt Shoutouts: Joe McBride gave a MEF Head User Group presentation and has posted How to Become a MEF Head – Slides & Code From SilverlightCream.com: Handling WP7 orientation changes via Visual States András Velvárt has an Expression Blend/WP7 post up discussing WP7 orientation changes and handling them via Visual States ... see an example from his SurfCube app, and a behavior to handle the control... with source. WP7 PerformanceProgressBar in depth WIndowsPhoneGeek has a post up discussing the WP7 Performance bar from the Windows Phone Toolkit. This is an update on the Toolkit based on the Feb 2011 release. Great explanation of the PerformanceProgressBar, external links, and sample code. Getting data out of WP7 WMAppManifest is easy with Coding4Fun PhoneHelper Next WindowsPhoneGeek has a post up about the PhoneHelper in the Coding4Fun TOolkit, and using it to get data out of the WMAppManifest easily. Good discussion, Links, and code as always Silverlight Unit Test For Phone In Jesse Liberty's "Windows Phone From Scratch" number 41, he's discussing Unit Testing for WP7... he gives some good external links and some good examples. Yet Another Podcast #27–Paul Betts Jesse Liberty's next post is his "Yet Another Podcast" number 27, and an interview with Paul Betts, the creator of Reactive UI... check out the podcast and also the good links listed. New Silverlight Video Tutorial: How to use the Fluid Move Behavior Victor Gaudioso has a new video tutorial up on using the Fluid Move Behavior... making a selected item animate from a ListBox to a Master Details Grid. Application Library Caching in Silverlight 4 Kunal Chowdhury takes a break from SilverlightZone long enough to write a post about Application Library Caching... for example on-demand loading of a 3rd-party XAP. Jounce Part 13: Navigation Parameters Jeremy Likness has his 13th post of a series in understanding his Jounce MVVM framework up. This episode surrounds a new release and what it contains, the primary focus being navigation parameters... that is you can raise a navigation event with a payload. Profiling Silverlight Applications after installing Visual Studio 2010 Service Pack 1 Michael Crump digs into the performance wizard for Silverlight that we get with VS2010 SP1. He shows how to get and read a profile... great intro to a new tool. Binding XML File to Data Grid in Silverlight Dhananjay Kumar demonstrates reading an XML file using LINQ to XML and binding the result to a Silverlight DataGrid Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Dynamically switching the theme in Orchard

    - by Bertrand Le Roy
    It may sound a little puzzling at first, but in Orchard CMS, more than one theme can be active at any given time. The reason for that is that we have an extensibility point that allows a module (or a theme) to participate in the choice of the theme to use, for each request. The motivation for building the theme engine this way was to enable developers to switch themes based on arbitrary criteria, such as user preferences or the user agent (if you want to serve a mobile theme for phones for example). The choice is made between the active themes, which is why there is a difference between the default theme and the active themes. In order to have a say in the choice of the theme, all you have to do is implement IThemeSelector. That interface is quite simple as it only has one method, GetTheme, that takes the current RequestContext and returns a ThemeSelectorResult or null if the implementation of the interface does not want to participate in the current request (we'll see an example in a moment). ThemeSelectorResult itself is just a ThemeName string property and an integer Priority. We're using a priority so that an arbitrary number of implementations of IThemeSelector can contribute to the choice of a theme. If you look for existing implementations of the interface in Orchard, you'll find four: AdminThemeSelector: selects the TheAdmin theme with a very high priority (100) if the current request is for a page that is part of the admin. Otherwise, null is returned, which enables other implementations to choose the theme. PreviewThemeSelector: selects the preview theme if there is one, with a high priority (90), and null otherwise. This enables administrators to view the site under a different theme while everybody else continues to see the current default theme. SiteThemeSelector: this is the implementation that is doing what you expect most of the time, which is to get the current theme from site settings and set it with a priority of –5. SafeModeThemeSelector: this is the fallback implementation, which should almost never win. It sets the theme as the safe mode theme, which has no style and just uses the default templates for everything. The priority is very low (-100). While this extensibility mechanism is great to have, I wanted to bring that level of choice into the hands of the site administrator rather than just developers. In order to achieve that, I built the Vandelay Theme Picker module. The module provides administration UI to create rules for theme selection. It provides its own extensibility point (the IThemeSelectionRule interface) and one implementation of a rule: UserAgentThemeSelectorRule. This rule gets the current user agent from the context and tries to match it with a regular expression that the administrator can configure in the admin UI. You can for example configure a rule with a regular expression that matches IE6 and serve a different subtheme where the stylesheet has been tweaked for such an antique browser. Another possible configuration is to detect mobile devices from their agent string and serve the mobile theme. All those operations can be done with this module entirely from the admin UI, without writing a line of code. The module also offers the administrator the opportunity to inject a link into the front-end in a specific zone and with a specific position that enables the user to switch to the default theme if he wishes to. This is especially useful for sites that use a mobile theme but still want to allow users to use the full desktop site. While the module is nice and flexible, it may be overkill. On my own personal blog, I have only two active themes: the desktop theme and the mobile theme. I'm fine with going into code to change the criteria on which to switch the theme, so I'm not using my own Theme Picker module. Instead, I made the mobile theme a theme with code (in other words there is a csproj file in the theme). The project includes a single C# file, my MobileThemeSelector for which the code is the following: public class MobileThemeSelector : IThemeSelector { private static readonly Regex _Msie678 = new Regex(@"^Mozilla\/4\.0 \(compatible; MSIE [678]" + @"\.0; Windows NT \d\.\d(.*)\)$", RegexOptions.IgnoreCase); private ThemeSelectorResult _requestCache; private bool _requestCached; public ThemeSelectorResult GetTheme(RequestContext context) { if (_requestCached) return _requestCache; _requestCached = true; var userAgent = context.HttpContext.Request.UserAgent; if (userAgent.IndexOf("phone", StringComparison.OrdinalIgnoreCase) != -1 || _Msie678.IsMatch(userAgent) || userAgent.IndexOf("windows live writer", StringComparison.OrdinalIgnoreCase) != -1) { _requestCache = new ThemeSelectorResult { Priority = 10, ThemeName = "VuLuMobile" }; } return _requestCache; } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The theme selector selects the current theme for Internet Explorer versions 6 to 8, for phones, and for Windows Live Writer (so that the theme that is used when I write posts is as simple as possible). What's interesting here is that it's the theme that selects itself here, based on its own criteria. This should give you a good panorama of what's possible in terms of dynamic theme selection in Orchard. I hope you find some fun uses for it. As usual, I can't wait to see what you're going to come up with…

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  • Silverlight Cream for April 18, 2010 -- #840

    - by Dave Campbell
    In this Issue: CrocusGirl, Giorgetti Alessandro(-2-), smartyP, Pete Brown, David Poll, David Anson, and Bill Reiss. Shoutouts: Yasser Makram has a post up discussing Human Centered ALM with Telerik TeamPulse and Team Foundation Server. I saw this demo'd at DevConnnections and it definitely deserves a look. Shawn Wildermuth posted his materials from DevConnections all on one post: Back from DevConnections with SourceCode Shawn Wildermuth also posted an Updated RIA Services + MVVM Example Laurent Bugnion announced a Small change in MVVM Light Toolkit templates for Blend 4 RC Laurent Bugnion also announced Crowdsourcing MVVM Light Toolkit support The Expression Blend and Design Blog announced Expression Blend 4 Release Candidate Available! Dan Wahlin posted Slides and Code from my Silverlight MVVM Talk at DevConnections From SilverlightCream.com: Windows Phone 7 Design Notes – Part#1: Metro Resources CrocusGirl has blogged about WP7 and the Metro design concept. She has a bunch of resources up and information about Metro and the design methodology. Stay tuned for Part 2. Silverlight, M-V-VM ... and IoC - part 1 Giorgetti Alessandro has part 1 of a multi-parter up on IoC and MVVM for LOB apps in Silverlight ... a pretty quick into to MVVM. Silverlight, M-V-VM … and IoC – part 2 Giorgetti Alessandro also posted part 2 of his series, and this one digs deeper into the code and discusses what goes into the view and the model. Using the Facebook Developer Toolkit With Windows Phone 7 smartyP has a post addressing using the Facebook Developer toolkit with WP7... it took some hacking, and he explains it, and provides it for download. Silverlight and WPF Tip: Fitting items in a ListBox Having trouble fitting items into a Listbox in Silverlight or WPF without getting horizontal scrollbars? Pete Brown has a solution for you in 4 steps. Making printing easier in Silverlight 4 David Poll has a great detailed post up about printing in SL4, taking it to building a higher-level API that allows printing of collections... all demos and source included. Detailed information about the Silverlight Toolkit's new stacked series support David Anson details the improvements to Data Visualization in the Toolkit release from last week. Space Rocks game step 9: the asteroid sprite Bill Reiss has his latest game episode up and this time he's putting asteroid sprites in play. No placement, movement, or collisions yet, but it's a beginning. And, he's updated all his code to Silverlight 4. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Donald Farmer comes to SQLBits

    What do medieval archaeology, fish farming, Southwestern University of Chongqing and Microsoft Business Intelligence have in common? If you know, you should tell Donald Farmer, because he has been deeply involved in all of them at various times. Donald has worked in the Microsoft Business Intelligence team for 8 years covering many subject areas: data integration, information quality, metadata intelligence, master data management, OLAP, predictive analytics and self-service BI. He is a well-known speaker at Microsoft and other industry events, and the author of several books and articles.   Great news from SQLBits! We can now confirm that Donald Farmer has agreed to do a pre-conference training day and the key note for our SQL Server 2008 and SQL Server 2008 R2 day. As Program Manager for Project Gemini, no-one is better placed to tell you what is going to be in R2 and what is not! More information about the Pre-conference Training Day and SQL 2008 and R2 Friday will be released soon.

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  • The Dark Knight meets The Avengers [Video]

    - by Asian Angel
    Batman and the Avengers team up to defeat a common enemy, but their ‘after battle’ plans are extremely different! Can Batman learn to be a ‘team player’ who relaxes and has fun, or will he brood alone in his cave forever? The Dark Knight Meets The Avengers [CollegeHumor] HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows? Java is Insecure and Awful, It’s Time to Disable It, and Here’s How

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  • SEO Suggestion For My Blog [closed]

    - by Rana
    I have a programming tutorial blog, which have decent traffic. However, I am interested to do some basic seo for my blog to get it optimized. I want to do it myself by learning. I was wondering if experts here can suggest me how should I proceed please? Also, if you please review my blog and suggest the most common seo concern that come to your mind first, those will be helpful as well. My blog site url is as follow: http://codesamplez.com/ Looking forward to your feedback soon. Thanks.

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  • Deluge bit torrent. No incoming connections?

    - by mark kirby
    Hi I keep getting a no incoming connections on my Deluge. I know this is a pretty common problem from Google, but I have posted here to see if any one knows why this happens. I have port forwarded my router and set Deluge to the correct port range. Is this just a bug ? It does not seem to affect the speed so I obviously do have incoming connections and Transmission says the ports are open. So I guess my question is why is this happening ?

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  • [News] Fluent.NET 1.0 disponible

    Fluent.NET est un framework Open Source proposant une surcouche des API .NET sous la forme d'interfaces fluentes. Le proc?d? s'appuie sur les extensions de m?thodes et facilite la lecture de code : "English speakers read from left to right, not from the outside in. So why are we writing code that way? Fluent.NET aims to correct this problem by adding extension methods where helper methods are typically used.". Le principe tend ? se g?n?raliser ces derni?res ann?es, notamment dans les langages de requ?tes objets.

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  • Oracle Utilities Framework Batch Easy Steps

    - by ACShorten
    Oracle Support have compiled a list of common Questions and Answers for Batch Processing in Oracle Utilities Application Framework. Customers and partners should take a look at these questions and answers before posting any question to support to save time. The Knowledge Base article is available from My Oracle Support under FW - Oracle Utilities Framework Batch Easy Steps (Doc ID 1306282.1). This article answers the questions but also posts links to other documents including the Batch Best Practices for Oracle Utilities Application Framework based products (Doc Id: 836362.1) and Oracle Utilities CCB Batch Operations And Configuration Guide (Doc Id: 753301.1) for more detailed information and explanation. Customers of Oracle Utilities Meter Data Management V2.0 and above, Oracle Utilities Mobile Workforce Management V2.0 and above, Oracle Enterprise Taxation and Policy Management V2.0 and above, and Oracle Utilities Smart Grid Gateway V2.0 (all editions) and above should refer to the Batch Server Administration Guide shipped with their products on eDelivery instead of using Doc Id: 753301.1.

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  • New release of the Windows Azure SDK and Tools (March CTP)

    - by kaleidoscope
    From now on, you only have to download the Windows Azure Tools for Microsoft Visual Studio and the SDK will be installed as part of that package. What’s new in Windows Azure SDK Support for developing Managed Full Trust applications. It also provides support for Native Code via PInvokes and spawning native processes. Support for developing FastCGI applications, including support for rewrite rules via URL Rewrite Module. Improved support for the integration of development storage with Visual Studio, including enhanced performance and support for SQL Server (only local instance). What’s new in Windows Azure Tools for Visual Studio Combined installer includes the Windows Azure SDK Addressed top customer bugs. Native Code Debugging. Update Notification of future releases. FastCGI template http://blogs.msdn.com/jnak/archive/2009/03/18/now-available-march-ctp-of-the-windows-azure-tools-and-sdk.aspx   Ritesh, D

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  • Quote of the Day: A Credo

    - by BuckWoody
    To live content with small means, to seek elegance rather than luxury, and refinement rather than fashion, to be worthy, not respectable, and wealthy, not rich, to study hard, think quietly, talk gently, act frankly, to listen to stars and birds, to babes and sages, with open heart, to bear all cheerfully, do all bravely, await occasions, hurry never, in a word to let the spiritual, unbidden and unconscious, grow up through the common, this is to be my symphony. William Henry Channing Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Issues when upgrading gnome-session

    - by Gabriel A. Zorrilla
    I'm having issues since yesterday after an upgrade. GNOME session got messed up somehow and now i cannot install further upgrades nor new apps. Here is what i got from terminal after doing the recommended apt-get install -f; (Reading database ... 166876 files and directories currently installed.) Preparing to replace gnome-session 3.0.1-0ubuntu1~build2 (using .../gnome-session_3.0.2-0ubuntu3~natty1_all.deb) ... Unpacking replacement gnome-session ... dpkg: error processing /var/cache/apt/archives/gnome-session_3.0.2-0ubuntu3~natty1_all.deb (--unpack): trying to overwrite '/usr/share/xsessions/gnome-shell.desktop', which is also in package gnome-shell 3.0.1-0ubuntu1~build1 Errors were encountered while processing: /var/cache/apt/archives/gnome-session_3.0.2-0ubuntu3~natty1_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) In var/log/apt/history.log, it says: Start-Date: 2011-05-29 17:56:16 Commandline: apt-get -f install Upgrade: gnome-session:amd64 (3.0.1-0ubuntu1~build2, 3.0.2-0ubuntu3~natty1) Error: Sub-process /usr/bin/dpkg returned an error code (1) End-Date: 2011-05-29 17:56:21 No idea what all this means.

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  • How to nest transactions nicely - &quot;begin transaction&quot; vs &quot;save transaction&quot; and SQL Server

    - by Brian Biales
    Do you write stored procedures that might be used by others?  And those others may or may not have already started a transaction?  And your SP does several things, but if any of them fail, you have to undo them all and return with a code indicating it failed? Well, I have written such code, and it wasn’t working right until I finally figured out how to handle the case when we are already in a transaction, as well as the case where the caller did not start a transaction.  When a problem occurred, my “ROLLBACK TRANSACTION” would roll back not just my nested transaction, but the caller’s transaction as well.  So when I tested the procedure stand-alone, it seemed to work fine, but when others used it, it would cause a problem if it had to rollback.  When something went wrong in my procedure, their entire transaction was rolled back.  This was not appreciated. Now, I knew one could "nest" transactions, but the technical documentation was very confusing.  And I still have not found the approach below documented anywhere.  So here is a very brief description of how I got it to work, I hope you find this helpful. My example is a stored procedure that must figure out on its own if the caller has started a transaction or not.  This can be done in SQL Server by checking the @@TRANCOUNT value.  If no BEGIN TRANSACTION has occurred yet, this will have a value of 0.  Any number greater than zero means that a transaction is in progress.  If there is no current transaction, my SP begins a transaction. But if a transaction is already in progress, my SP uses SAVE TRANSACTION and gives it a name.  SAVE TRANSACTION creates a “save point”.  Note that creating a save point has no effect on @@TRANCOUNT.  So my SP starts with something like this: DECLARE @startingTranCount int SET @startingTranCount = @@TRANCOUNT IF @startingTranCount > 0 SAVE TRANSACTION mySavePointName ELSE BEGIN TRANSACTION -- … Then, when ready to commit the changes, you only need to commit if we started the transaction ourselves: IF @startingTranCount = 0 COMMIT TRANSACTION And finally, to roll back just your changes so far: -- Roll back changes... IF @startingTranCount > 0 ROLLBACK TRANSACTION MySavePointName ELSE ROLLBACK TRANSACTION Here is some code that you can try that will demonstrate how the save points work inside a transaction. This sample code creates a temporary table, then executes selects and updates, documenting what is going on, then deletes the temporary table. if running in SQL Management Studio, set Query Results to: Text for best readability of the results. -- Create a temporary table to test with, we'll drop it at the end. CREATE TABLE #ATable( [Column_A] [varchar](5) NULL ) ON [PRIMARY] GO SET NOCOUNT ON -- Ensure just one row - delete all rows, add one DELETE #ATable -- Insert just one row INSERT INTO #ATable VALUES('000') SELECT 'Before TRANSACTION starts, value in table is: ' AS Note, * FROM #ATable SELECT @@trancount AS CurrentTrancount --insert into a values ('abc') UPDATE #ATable SET Column_A = 'abc' SELECT 'UPDATED without a TRANSACTION, value in table is: ' AS Note, * FROM #ATable BEGIN TRANSACTION SELECT 'BEGIN TRANSACTION, trancount is now ' AS Note, @@TRANCOUNT AS TranCount UPDATE #ATable SET Column_A = '123' SELECT 'Row updated inside TRANSACTION, value in table is: ' AS Note, * FROM #ATable SAVE TRANSACTION MySavepoint SELECT 'Save point MySavepoint created, transaction count now:' as Note, @@TRANCOUNT AS TranCount UPDATE #ATable SET Column_A = '456' SELECT 'Updated after MySavepoint created, value in table is: ' AS Note, * FROM #ATable SAVE TRANSACTION point2 SELECT 'Save point point2 created, transaction count now:' as Note, @@TRANCOUNT AS TranCount UPDATE #ATable SET Column_A = '789' SELECT 'Updated after point2 savepoint created, value in table is: ' AS Note, * FROM #ATable ROLLBACK TRANSACTION point2 SELECT 'Just rolled back savepoint "point2", value in table is: ' AS Note, * FROM #ATable ROLLBACK TRANSACTION MySavepoint SELECT 'Just rolled back savepoint "MySavepoint", value in table is: ' AS Note, * FROM #ATable SELECT 'Both save points were rolled back, transaction count still:' as Note, @@TRANCOUNT AS TranCount ROLLBACK TRANSACTION SELECT 'Just rolled back the entire transaction..., value in table is: ' AS Note, * FROM #ATable DROP TABLE #ATable The output should look like this: Note                                           Column_A ---------------------------------------------- -------- Before TRANSACTION starts, value in table is:  000 CurrentTrancount ---------------- 0 Note                                               Column_A -------------------------------------------------- -------- UPDATED without a TRANSACTION, value in table is:  abc Note                                 TranCount ------------------------------------ ----------- BEGIN TRANSACTION, trancount is now  1 Note                                                Column_A --------------------------------------------------- -------- Row updated inside TRANSACTION, value in table is:  123 Note                                                   TranCount ------------------------------------------------------ ----------- Save point MySavepoint created, transaction count now: 1 Note                                                   Column_A ------------------------------------------------------ -------- Updated after MySavepoint created, value in table is:  456 Note                                              TranCount ------------------------------------------------- ----------- Save point point2 created, transaction count now: 1 Note                                                        Column_A ----------------------------------------------------------- -------- Updated after point2 savepoint created, value in table is:  789 Note                                                     Column_A -------------------------------------------------------- -------- Just rolled back savepoint "point2", value in table is:  456 Note                                                          Column_A ------------------------------------------------------------- -------- Just rolled back savepoint "MySavepoint", value in table is:  123 Note                                                        TranCount ----------------------------------------------------------- ----------- Both save points were rolled back, transaction count still: 1 Note                                                            Column_A --------------------------------------------------------------- -------- Just rolled back the entire transaction..., value in table is:  abc

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  • Good baseline size for an A* Search grid?

    - by Jo-Herman Haugholt
    I'm working on a grid based game/prototype with a continuous open map, and are currently considering what size to make each segment. I've seen some articles mention different sizes, but most of them is really old, so I'm unsure how well they map to the various platforms and performance demands common today. As for the project, it's a hybrid of 2D and 3D, but for path-finding purposes, the majority of searches would be approximately 2D. From a graphics perspective, the minimum segment size would be 64x64 in the XZ plane to minimize loaded segments while ensuring full screen coverage. I figure pathfinding would be an important indicator of maximum practical size.

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  • Returning a mock object from a mock object

    - by Songo
    I'm trying to return an object when mocking a parser class. This is the test code using PHPUnit 3.7 //set up the result object that I want to be returned from the call to parse method $parserResult= new ParserResult(); $parserResult->setSegment('some string'); //set up the stub Parser object $stubParser=$this->getMock('Parser'); $stubParser->expects($this->any()) ->method('parse') ->will($this->returnValue($parserResult)); //injecting the stub to my client class $fileHeaderParser= new FileWriter($stubParser); $output=$fileParser->writeStringToFile(); Inside my writeStringToFile() method I'm using $parserResult like this: writeStringToFile(){ //Some code... $parserResult=$parser->parse(); $segment=$parserResult->getSegment();//that's why I set the segment in the test. } Should I mock ParserResult in the first place, so that the mock returns a mock? Is it good design for mocks to return mocks? Is there a better approach to do this all?!

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  • Complexity of a web application

    - by Dominik G
    I am currently writing my Master's Thesis on maintainability of a web application. I found some methods like the "Maintainability Index" by Coleman et.al. or the "Software Maintainability Index" by Muthanna et.al. For both of them one needs to calculate the cyclomatic complexity. So my question is: Is it possible to measure the cyclomatic complexity of a web application? In my opinion there are three parts to a web application: Server code (PHP, C#, Python, Perl, etc.) Client code (JavaScript) HTML (links and forms as operators, GET-parameters and form fields as operands!?) What do you think? Is there another point of view on the complexity of web application? Did I miss something?

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  • Does using GCC specific builtins qualify as incorporation within a project?

    - by DavidJFelix
    I understand that linking to a program licensed under the GPL requires that you release the source of your program under the GPL as well, while the LGPL does not require this. The terminology of the (L)GPL is very clear about this. #include "gpl_program.h" means you'd have to license GPL, because you're linking to GPL licensed code. And #include "lgpl_program.h" means you're free to license however you want, so that it doesn't explicitly prohibit linking to LGPL source. Now, my question about what isn't clear is: [begin question] GCC is GPL licensed, compiling with GCC, does not constitute "integration" into your program, as the GPL puts it; does using builtin functions (which are specific to GCC) constitute "incorporation" even though you haven't explicitly linked to this GPL licensed code? My intuition tells me that this isn't the intention, but legality isn't always intuitive. I'm not actually worried, but I'm curious if this could be considered the case. [end question] [begin aside] The reason for my equivocation is that GCC builtins like __builtin_clzl() or __builtin_expect() are an API technically and could be implemented in another way. For example, many builtins were replicated by LLVM and the argument could be made that it's not implementation specific to GCC. However, many builtins have no parallel and when compiled will link GPL licensed code in GCC and will not compile on other compilers. If you make the argument here that the API could be replicated by another compiler, couldn't you make that identical claim about any program you link to, so long as you don't distribute that source? I understand that I'm being a legal snake about this, but it strikes me as odd that the GPL isn't more specific. I don't see this as a reasonable ploy for proprietary software creators to bypass the GPL, as they'd have to bundle the GPL software to make it work, removing their plausible deniability. However, isn't it possible that if builtins don't constitute linking, then open source proponents who oppose the GPL could simply write a BSD/MIT/Apache/Apple licensed product that links to a GPL'd program and claim that they intend to write a non-GPL interface that is identical to the GPL one, preserving their BSD license until it's actually compiled? [end aside] Sorry for the aside, I didn't think many people would follow why I care about this if I'm not facing any legal trouble or implications. Don't worry too much about the hypotheticals there, I'm just extrapolating what either answer to my actual question could imply.

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  • Using Cloud OER to Find Fusion Applications On-Premise Service Concrete WSDL URL by Rajesh Raheja

    - by JuergenKress
    In my previous post on Fusion Applications Integration, the Fusion Applications OER white paper explains Oracle Enterprise Repository (OER) usage in the applications context, assuming a dedicated OER for your Fusion Applications instance (whether cloud/SaaS or on-premise). Having a dedicated OER instance is recommended as it can provide customized service metadata and can be used for overall SOA governance in addition to simple service discovery. One of the common queries I get is how on-premise customers without a dedicated OER can find a concrete service WSDL URL for their specific environment using the cloud hosted OER instance. Read the full article here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: OER,SOA Governance,SOA Community,Oracle SOA,Oracle BPM,BPM,Community,OPN,Jürgen Kress

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  • OData where art thou?

    - by Brian
    Douglas Purdy explains. I think the best part will be the governmental aspect. All public record should be available in a way that’s easy to query IMHO. From the article: Many of us at Microsoft believe the OData protocol can help usher in a more open and programmable Web by creating a common funnel to expose rich data, thereby creating a world of customized consumer mash-ups; a world where government data is transparent and accessible to any citizen; a world where you can ask a question and know, “There’s a feed for that.” Do check out www.odata.org, and while you’re at it, check out codename Dallas. For all those government IT workers out there, consider the savings. No need to pay someone to format the data for a specific department or constituent. Just put it online and point them there.

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  • How do I get a Canon imageClass MF4350d printer working?

    - by Dan
    I have an imageClass MF4350d printer/scanner/fax. I've tried to install the drivers. The printer is recognized in the system settings, but nothing prints. The scanner is working in simple scan. I tried following all of the troubleshooting suggestions in this thread with no success I downloaded this driver. I downloaded the Linux_UFRII_PrinterDriver_V230_uk_EN from Canon: Installation: 1st attempt: I installed the CNCUPSMF4350ZK.ppd file in the printer settings and moved the pstoufr2cpca file to /usr/lib/cups/filter. 2nd attempt: I followed forum advice of installing a fake gs-esp to tell the system that "gs-esp" is PROVIDED by the package "fake-gs-esp" I then converted the RPM sudo apt-get install alien sudo alien -k cndrvcups-common-2.20-1.x86_64.rpm sudo alien -k cndrvcups-ufr2-uk-2.20-1.x86_64.rpm I then installed the resulting .deb packages. Since I'm new to Linux, as much detail as possible in your suggestions would be very appreciated. I am still learning how to use the Terminal. Thank you very much!

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  • Model Driven Architecture Approach in programming / modelling

    - by yak
    I know the basics of the model driven architecture: it is all about model the system which I want to create and create the core code afterwards. I used CORBA a while ago. First thing that I needed to do was to create an abstract interface (some kind of model of the system I want to build) and generate core code later. But I have a different question: is model driven architecture a broad approach or not? I mean, let's say, that I have the language (modelling language) in which I want to model EXISTING system (opposite to the system I want to CREATE), and then analyze the model of the created system and different facts about that modeled abstraction. In this case, can the process I described above be considered the model driven architecture approach? I mean, I have the model, but this is the model of the existing system, not the system to be created.

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  • Best Practices of Performance Management Plan (PMP)

    - by Robert Story
    Upcoming WebcastTitle: Best Practices of Performance Management Plan (PMP)Date: April 22, 2010Time: 11 AM EST / 8 AM PST / 8.30 PM IST  Product Family: EBS HRMS SummaryThis webcast will cover the best practices of Performance Management Plan(PMP) in very common scenarios. The best practices will address major issues around plan dates, new hire, manager transfer and related events. The session will also cover HRMS Patching Strategy, Key References and various customer communication channels.A short, live demonstration (only if applicable) and question and answer period will be included.Click here to register for this session....... ....... ....... ....... ....... ....... .......The above webcast is a service of the E-Business Suite Communities in My Oracle Support.For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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  • When to use shared libraries for a web framework?

    - by CamelBlues
    tl;dr: I've found myself hosting a bunch of sites running on the same web framework (symfony 1.4). Would it be helpful if I moved all of the shared library code into the same directory and shared it across the sites? more I see some advantages to this: Each site takes up less disk space Library updates (an unlikely scenario) can take place across all sites I also see some disadvantages, mostly in terms of a single point of failure and the inability to have sites using different versions of the framework. My real concern, though, is performance. I hypothesize that I will see a performance increase, since the PHP code will already be cached for all sites when they call the framework. Is this a correct hypothesis?

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  • Objective-C Moving UIView along a curved path

    - by PruitIgoe
    I'm not sure if I am approaching this the correct way. In my app, when a user touches the screen I capture the point and create an arc from a fixed point to that touch point. I then want to move a UIView along that arc. Here's my code: ViewController.m //method to "shoot" object - KIP_Projectile creates the arc, KIP_Character creates the object I want to move along the arc ... //get arc for trajectory KIP_Projectile* vThisProjectile = [[KIP_Projectile alloc] initWithFrame:CGRectMake(51.0, fatElvisCenterPoint-30.0, touchPoint.x, 60.0)]; vThisProjectile.backgroundColor = [UIColor clearColor]; [self.view addSubview:vThisProjectile]; ... KIP_Character* thisChar = [[KIP_Character alloc] initWithFrame:CGRectMake(51, objCenterPoint-5, imgThisChar.size.width, imgThisChar.size.height)]; thisChar.backgroundColor = [UIColor clearColor]; thisChar.charID = charID; thisChar.charType = 2; thisChar.strCharType = @"Projectile"; thisChar.imgMyImage = imgThisChar; thisChar.myArc = vThisProjectile; [thisChar buildImage]; [thisChar traceArc]; in KIP_Projectile I build the arc using this code: - (CGMutablePathRef) createArcPathFromBottomOfRect : (CGRect) rect : (CGFloat) arcHeight { CGRect arcRect = CGRectMake(rect.origin.x, rect.origin.y + rect.size.height - arcHeight, rect.size.width, arcHeight); CGFloat arcRadius = (arcRect.size.height/2) + (pow(arcRect.size.width, 2) / (8*arcRect.size.height)); CGPoint arcCenter = CGPointMake(arcRect.origin.x + arcRect.size.width/2, arcRect.origin.y + arcRadius); CGFloat angle = acos(arcRect.size.width / (2*arcRadius)); CGFloat startAngle = radians(180) + angle; CGFloat endAngle = radians(360) - angle; CGMutablePathRef path = CGPathCreateMutable(); CGPathAddArc(path, NULL, arcCenter.x, arcCenter.y, arcRadius, startAngle, endAngle, 0); return path; } - (void)drawRect:(CGRect)rect { CGContextRef currentContext = UIGraphicsGetCurrentContext(); _myArcPath = [self createArcPathFromBottomOfRect:self.bounds:30.0]; CGContextSetLineWidth(currentContext, 1); CGFloat red[4] = {1.0f, 0.0f, 0.0f, 1.0f}; CGContextSetStrokeColor(currentContext, red); CGContextAddPath(currentContext, _myArcPath); CGContextStrokePath(currentContext); } Works fine. The arc is displayed with a red stroke on the screen. In KIP_Character, which has been passed it's relevant arc, I am using this code but getting no results. - (void) traceArc { CGMutablePathRef myArc = _myArc.myArcPath; // Set up path movement CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; pathAnimation.calculationMode = kCAAnimationPaced; pathAnimation.fillMode = kCAFillModeForwards; pathAnimation.removedOnCompletion = NO; pathAnimation.path = myArc; CGPathRelease(myArc); [self.layer addAnimation:pathAnimation forKey:@"savingAnimation"]; } Any help here would be appreciated.

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