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  • Desktop Fun: Auroras Wallpaper Collection Series 2

    - by Asian Angel
    Auroras are truly a one of a kind visual experience that can leave you breathless and filled with wonder. Turn your desktop into a phenomenal display of color and light with the second in our series of Auroras Wallpaper collections. HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • A Website Building Program in Creating Your Own Business Website

    You can create your own business website even without the experience of knowing how to do so. This is the brilliant thing about website building. Through the use of an effective website building program, you can be assured that you can achieve the results that you want and create the website for your needs without the difficulty of learning too much about website building.

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  • learning on the clock

    - by T. Webster
    Some might argue this question is too general, but because keeping up seems especially relevant to programming, is anyone's experience that: do employers expect you to stay current? what is the "industry standard" of expected time a programmer should spend keeping up-to-date? is it generally acceptable that a programmer can spend some time during working hrs on meeting the expectation to keep skills current? If not, how do most programmers find the time? -

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  • Safely deploying changes to production servers

    - by oazabir
    When you deploy incremental changes on a production server, which is running and live all the time, you some times see error messages like “Compiler Error Message: The Type ‘XXX’ exists in both…”. Sometimes you find Application_Start event not firing although you shipped a new class, dll or web.config. Sometimes you find static variables not getting initialized and so on. There are so many weird things happen on webservers when you incrementally deploy changes to the server and the server has been up and running for several weeks. So, I came up with a full proof house keeping steps that we always do whenever we deploy some incremental change to our websites. These steps ensure that the web sites are properly recycled , cached are cleared, all the data stored at Application level is initialized. First of all you should have multiple web servers behind load balancer. This way you can take one server our of the production traffic, do your deployment and house keeping tasks like restarting IIS, and then put it back. Then you can do it for the second server and so on. This ensures there’s no outage for customer. If you can do it reasonable fast, hopefully customers won’t notice discrepancy between the servers some having new code and some having old code. You should only do this when your changes aren’t drastic. For ex, you aren’t delivering a complete revamped UI. In that case, some users hitting server1 with latest UI will suddenly get a completely different experience and then on next page refresh, they might hit server2 with old code and get a totally different experience. This works for incremental non-dramatic changes only.   During deployment you should follow these steps: Take server X out of load balancer so that it does not get any traffic. Stop all windows services on the server. Stop IIS. Delete the Temporary ASP.NET folders of all .NET versions incase you have multiple .NET versions running. You can follow this link. Deploy the changes. Flush any distributed cache you have, for ex, Velocity or Memcached. Start IIS. Start the windows services on the server. Warm up all websites by hitting major URLs on the websites. You should have some automated script to do this. You can use tinyget to hit some major URLs, especially pages that take a lot of time to compile. Read my post on keeping websites warm with zero coding. Put server X back to load balancer so that it starts receiving traffic. That’s it. It should give you a clean deployment and prevent unexpected errors. You should print these steps and hang on the desk of your deployment guys so that they never forget during deployment pressure.

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  • Google Chrome Extensions Developer Snapshots - Glue

    Google Chrome Extensions Developer Snapshots - Glue Karen Teng, VP Engineering of Adaptive Blue (www.getglue.com), discusses her company's experience with the Google Chrome extensions platform. To learn more on creating Google Chrome Extensions please visit code.google.com/chrome/extensions or chek out the gallery at chrome.google.com/extensions. From: GoogleDevelopers Views: 4 0 ratings Time: 05:34 More in Science & Technology

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  • How do I get the brightness control working on a Lenovo Yoga 13?

    - by Viktor Ax
    Brightness control doesn't work by default in Ubuntu 13.04. Solution for 12.10 doesn't work, also as this Any idea how to fix it? Update: After research I found how to change brightness manually. What need to do is to type in terminal: echo 2000 | sudo tee /sys/class/backlight/intel_backlight/brightness It will reduce brightness by half, but still would be good to find solution which will allow to use keyboard for changing brightness. Update2: Found solution, see below

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  • MS Certifications - Useful to your career ?

    - by NeilHambly
    Now I admit I've had mixed feelings on the certification subject previously and of a result I've not looked @ going down the MS Certification route, however with my previous experience this really hasn't hindered my progress any (Thankfully). However as I now have a different perspective for a number of varying reasons of which I will not bore you with the details. I will be undertaking some exams (6 of them) for accredition so right now I'm just formulating my study plans, with my...(read more)

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  • RedGate SQL Source Control and TFSPreview

    - by andyleonard
    I am excited that RedGate ’s SQL Source Control now supports connectivity to TFSPreview ,  Microsoft ’s cloud-based Application Life Cycle Management portal. Buck Woody ( Blog | @buckwoody ) and I have written about TFSPreview at SQLBlog already: Team Foundation Server (TFS) in the Cloud - My Experience So Far (Buck) Introducing TFSPreview: Application Lifecycle Management in the Cloud! Using TFSPreview: Step 1, Connecting Microsoft’s commitment to cloudtech is strong and producing very cool...(read more)

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  • Development: SDK for Social Net

    - by loldop
    I have a task: development sdk for social networking service like facebook, twitter and etc. At now i'm developing facebook-extension-sdk which based on facebook-ios-sdk 3.0. But not all social networking services have good sdks. And all time i improved my facebook-extension-sdk, when i see ugly code :( Please, advise me good techniques to development these sdks (like design-patterns or your own experience or good books/sites). Thanks!

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  • Pronunciation of "char"

    - by Zannjaminderson
    I know there's another question on here already about pronunciation here, but it's got a whole list of programming terms. I'm just interested in finding out how everybody pronounces just one thing - "char". I personally like "care" as in the first syllable of "character", since that's what it represents, but in past experience I've found there are far more people who say "char" as in "char-broiled", and some who say "car". Sorry to start a holy war, but I'm curious.

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  • Could I improve lyrics display in OSD Lyrics by adding other lyrics sources beside its default ones (ttPlayer and Xiami)?

    - by cipricus
    OSD Lyrics has a very good way of displaying lyrics but its sources seem poor - compared to what I experience in Windows with Foobar and in Ubuntu with CoverGloobus. The latter uses a small non-adjustable font, so I would rather prefer to use OSD Lyrics, were it not for this problem. Many people recommend OSD Lyrics as the best way to display lyrics, but in fact it couldn't even find lyrics for some songs of The Beatles, for example, not to mention other less popular artists.

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  • I want to install and get to building a personal MySQL DB

    - by Ari Hall
    So how do I go from installing MySQL from the Software Center to inputing data into fields and bringing in a comma delimited file? I've only had brief experience with MSAccess and OOo Base a long time ago, so details are appreciated, I just want to get up and running. I have Ubuntu 10.10, 64 bit, if that affects much. If you can link me to a howto that does exactly what I'm looking for, that would work. Again, Thanks!

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  • Game engine help

    - by Nick
    So, I am looking to start designing a video game. My biggest problem right now is choosing the right game engine. I am hiring a programmer, so the language doesn't really matter as much. What I need is an engine with these features, for very, very cheap: -Ability to create very realistic AI -Ability to display, hundreds, possibly thousands of characters Also, if anyone has any experience with Darkbasic Pro, if they could give me a basic run-through and review of it. Thanks a lot!

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  • permanently load module

    - by Radu
    I have a Compaq Presario CQ-61 320SQ, I am using Ubuntu 10.04 because after update to 10.10 my mouse and touchpad won't work, network won't work, sound won't work ... (I managed to fix most of them after almost a month of googling, but not all, my 2 Desktops have no problem with 10.10) so I decided to switch back to 10.04, where I have a problem: My broadband speed is very low beacause of the kernel module r8169, I downloaded the good module r8101 and every time the computer boots have a rc.local entry to fix this. Question: Can I load the modul permanently from a specific location. I heard about /etc/modules but there I need the module name, but I have to load it from a specific path (where is the default path for that) Thank you. So I studied the script: It creates the file r8101.ko in /lib/modules/uname -r/kernel/drivers/net so I think as long as nobody will delete that file, and I don't update the kernel, maybe adding r8108 to /etc/modules will work, and add r8169 to blacklist ... I will give it a try. EDIT2: So I added r8101 to /etc/modules and blacklist r8169 to /etc/modprobe.d/blacklist.conf It still uses the old module, lsmod prints: radu@adu:~$ lsmod | grep r8 r8101 67626 0 r8169 34108 0 mii 4381 1 r8169 EDIT: the module is loaded using this script that came with it: #!/bin/sh # invoke insmod with all arguments we got # and use a pathname, as insmod doesn't look in . by default TARGET_PATH=/lib/modules/`uname -r`/kernel/drivers/net echo echo "Check old driver and unload it." check=`lsmod | grep r8169` if [ "$check" != "" ]; then echo "rmmod r8169" /sbin/rmmod r8169 fi check=`lsmod | grep r8101` if [ "$check" != "" ]; then echo "rmmod r8101" /sbin/rmmod r8101 fi echo "Build the module and install" echo "-------------------------------" >> log.txt date 1>>log.txt make all 1>>log.txt || exit 1 module=`ls src/*.ko` module=${module#src/} module=${module%.ko} if [ "$module" == "" ]; then echo "No driver exists!!!" exit 1 elif [ "$module" != "r8169" ]; then if test -e $TARGET_PATH/r8169.ko ; then echo "Backup r8169.ko" if test -e $TARGET_PATH/r8169.bak ; then i=0 while test -e $TARGET_PATH/r8169.bak$i do i=$(($i+1)) done echo "rename r8169.ko to r8169.bak$i" mv $TARGET_PATH/r8169.ko $TARGET_PATH/r8169.bak$i else echo "rename r8169.ko to r8169.bak" mv $TARGET_PATH/r8169.ko $TARGET_PATH/r8169.bak fi fi fi echo "Depending module. Please wait." depmod -a echo "load module $module" modprobe $module echo "Completed." exit 0

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  • links for 2010-05-21

    - by Bob Rhubart
    Stewart Bryson: Rittman Mead America is Recruiting "We don’t employ any junior consultants," writes Bryson, "so you would have to be highly experienced with some or all of the Oracle BI Stack (OBIEE, OWB, ODI, the Oracle Database, Hyperion), preferably have consulting experience, and excellent client-facing skills. Our consultants also provide all of our training services, and most of us write and speak at conferences, so being articulate and passionate about Oracle BI is another requirement. (tags: jobs employment consultants oracle businessintelligence)

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  • good/bad idea to use email address in php session variable? [closed]

    - by Stephan Hovnanian
    I'm developing some additional functionality for a client's website that uses the email address as a key lookup variable between various databases (email marketing system, internal prospect database, and a third shared DB that helps bridge the gap between the two). I'm concerned that storing a visitor's email address as a $_SESSION variable could lead to security issues (not so much for our site, but for the visitor). Anybody have suggestions or experience on whether this is okay to do, or if there's another alternative out there?

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  • Most Unprofessional Workplace

    - by TehGrumpyCoder
    I've worked lots of places in lots of roles: Delivery truck driver, Boilermaker, antenna rigger, Professional Musician, Electronic Technician, Electrical Engineer, and for most of my career: Software Turkey. I want to say this large company is the most unprofessional place I've ever worked, but then I think about other jobs such as TTI that stiffed us all for 10 months salary -- or had us work 2-1/2 years at 66% however you want to look at it, or maybe NeoPlanet with a cast from a bad sitcom running the show, I could go on, but I digress (as usual). So maybe this place isn't the *most* unprofessional, but the personnel rank up there. I'm in a small room off a factory. There are 3 managerial offices, and 36 common-folk of various skill-sets in a variety of single to quad cubicles. No matter where you sit though, because of the layout and location, you've got a hard wall as one wall of your cubicle. Because of that hard wall, everything echoes. I get off the phone, and the guy in the next cubicle makes a comment in response to my phone conversation... I hate that it can be heard and I hate that they do that! These people have no problem yelling from cube to cube to carry on running conversations some of which are actually work-related. There's a lady two cubes away that talks so loud I can clearly hear every phone conversation she has... all work-related but still... Then the one in the next cubicle must have been raised on a farm because there's only one volume setting: LOUD... "HEY MARGE, CAN I GET IN FOR A QUICK APPOINTMENT AFTER WORK TONIGHT?" ... sigh Also that cube is the 'party cube' so that's where all the candy, cake, donuts, and leftovers sits. Anything MzLoud brings in has to have a verbal recipe associated with it at least 10 times during the day, and of course at volume. I've had running conversations over the top of my cube from people in the next one on each side. The weird thing is... the boss sits with an open door closer to this whole fiasco than me. So I wear a pair of Bose noise-cancelling headphones, and crank up Kenny Burrell, Herb Ellis, Wes Montgomery, or Jimmy Smith to the point I can't hear the racket... what the heck, I already have a hearing loss from playing guitar.

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  • The Birth of a Method - Where did OUM come from?

    - by user702549
    It seemed fitting to start this blog entry with the OUM vision statement. The vision for the Oracle® Unified Method (OUM) is to support the entire Enterprise IT lifecycle, including support for the successful implementation of every Oracle product.  Well, it’s that time of year again; we just finished testing and packaging OUM 5.6.  It will be released for general availability to qualifying customers and partners this month.  Because of this, I’ve been reflecting back on how the birth of Oracle’s Unified method - OUM came about. As the Release Director of OUM, I’ve been honored to package every method release.  No, maybe you’d say it’s not so special.  Of course, anyone can use packaging software to create an .exe file.  But to me, it is pretty special, because so many people work together to make each release come about.  The rich content that results is what makes OUM’s history worth talking about.   To me, professionally speaking, working on OUM, well it’s been “a labor of love”.  My youngest child was just 8 years old when OUM was born, and she’s now in High School!  Watching her grow and change has been fascinating, if you ask her, she’s grown up hearing about OUM.  My son would often walk into my home office and ask “How is OUM today, Mom?”  I am one of many people that take care of OUM, and have watched the method “mature” over these last 6 years.  Maybe that makes me a "Method Mom" (someone in one of my classes last year actually said this outloud) but there are so many others who collaborate and care about OUM Development. I’ve thought about writing this blog entry for a long time just to reflect on how far the Method has come. Each release, as I prepare the OUM Contributors list, I see how many people’s experience and ideas it has taken to create this wealth of knowledge, process and task guidance as well as templates and examples.  If you’re wondering how many people, just go into OUM select the resources button on the top of most pages of the method, and on that resources page click the ABOUT link. So now back to my nostalgic moment as I finished release 5.6 packaging.  I reflected back, on all the things that happened that cause OUM to become not just a dream but to actually come to fruition.  Here are some key conditions that make it possible for each release of the method: A vision to have one method instead of many methods, thereby focusing on deeper, richer content People within Oracle’s consulting Organization  willing to contribute to OUM providing Subject Matter Experts who are willing to write down and share what they know. Oracle’s continued acquisition of software companies, the need to assimilate high quality existing materials from these companies The need to bring together people from very different backgrounds and provide a common language to support Oracle Product implementations that often involve multiple product families What came first, and then what was the strategy? Initially OUM 4.0 was based on Oracle’s J2EE Custom Development Method (JCDM), it was a good “backbone”  (work breakdown structure) it was Unified Process based, and had good content around UML as well as custom software development.  But it needed to be extended in order to achieve the OUM Vision. What happened after that was to take in the “best of the best”, the legacy and acquired methods were scheduled for assimilation into OUM, one release after another.  We incrementally built OUM.  We didn’t want to lose any of the expertise that was reflected in AIM (Oracle’s legacy Application Implementation Method), Compass (People Soft’s Application implementation method) and so many more. When was OUM born? OUM 4.1 published April 30, 2006.  This release allowed Oracles Advanced Technology groups to begin the very first implementations of Fusion Middleware.  In the early days of the Method we would prepare several releases a year.  Our iterative release development cycle began and continues to be refined with each Method release.  Now we typically see one major release each year. The OUM release development cycle is not unlike many Oracle Implementation projects in that we need to gather requirements, prioritize, prepare the content, test package and then go production.  Typically we develop an OUM release MoSCoW (must have, should have, could have, and won’t have) right after the prior release goes out.   These are the high level requirements.  We break the timeframe into increments, frequent checkpoints that help us assess the content and progress is measured through frequent checkpoints.  We work as a team to prioritize what should be done in each increment. Yes, the team provides the estimates for what can be done within a particular increment.  We sometimes have Method Development workshops (physically or virtually) to accelerate content development on a particular subject area, that is where the best content results. As the written content nears the final stages, it goes through edit and evaluation through peer reviews, and then moves into the release staging environment.  Then content freeze and testing of the method pack take place.  This iterative cycle is run using the OUM artifacts that make sense “fit for purpose”, project plans, MoSCoW lists, Test plans are just a few of the OUM work products we use on a Method Release project. In 2007 OUM 4.3, 4.4 and 4.5 were published.  With the release of 4.5 our Custom BI Method (Data Warehouse Method FastTrack) was assimilated into OUM.  These early releases helped us align Oracle’s Unified method with other industry standards Then in 2008 we made significant changes to the OUM “Backbone” to support Applications Implementation projects with that went to the OUM 5.0 release.  Now things started to get really interesting.  Next we had some major developments in the Envision focus area in the area of Enterprise Architecture.  We acquired some really great content from the former BEA, Liquid Enterprise Method (LEM) along with some SMEs who were willing to work at bringing this content into OUM.  The Service Oriented Architecture content in OUM is extensive and can help support the successful implementation of Fusion Middleware, as well as Fusion Applications. Of course we’ve developed a wealth of OUM training materials that work also helps to improve the method content.  It is one thing to write “how to”, and quite another to be able to teach people how to use the materials to improve the success of their projects.  I’ve learned so much by teaching people how to use OUM. What's next? So here toward the end of 2012, what’s in store in OUM 5.6, well, I’m sure you won’t be surprised the answer is Cloud Computing.   More details to come in the next couple of weeks!  The best part of being involved in the development of OUM is to see how many people have “adopted” OUM over these six years, Clients, Partners, and Oracle Consultants.  The content just gets better with each release.   I’d love to hear your comments on how OUM has evolved, and ideas for new content you’d like to see in the upcoming releases.

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  • links for 2011-02-18

    - by Bob Rhubart
    VirtualBox: Pre-Built Developer VMs "Learning your way around a new software stack is challenging enough without having to spend multiple cycles on the install process. Instead, we have packaged such stacks into pre-built Oracle VM VirtualBox appliances that you can download, install, and experience as a single unit." (tags: oracle virtualization virtualbox) Java Space on Parleys (The Java Source) "'Oracle partnered with Stephan Janssen, founder of Parleys to make this happen. Parleys website offers a user friendly experience to view online content. You can download some of the talks to your desktop or watch them on the go on mobile devices." (tags: oracle java parleys) Why ADF Developers Should Attend ODTUG This Year (Shay Shmeltzer's Weblog) Shay says: "A new track called the "Fusion Middleware" track has been formed and it has lots of sessions for any level of ADF developer. The track is run by several Oracle ACEs who are also involved in the ADF Enterprise Methodology Group." (tags: oracle otn odtug fusionmiddleware) Wrapping up an Exciting Mobile World Congress (The Java Source) "One of the more popular topics in our booth was the use of Java in the Smart Grid. In our booth we were showing off some of the work of the Hydra Consortium whose goal it is to leverage the emerging smart grid infrastructure to securely enable the delivery of personal health data..." (tags: oracle java smartgrid) How to Audit and Monitor BI Publisher Reports Access? (Oracle BI Publisher Blog) "Do you know who is accessing to which report at what time at your reporting environment ? As you delivered the BI Publisher reports to the production environment and your users start using them as part of their daily business operations you might wonder such questions." (tags: oracle otn businessintelligence) Oracle VM VirtualBox 4.0.4 Released! (Oracle's Virtualization Blog) Fat Bloke says: "Oracle made a maintenance update release of Oracle VM VirtualBox version 4.0.4 today. You can Download it now, or read about the changes in the ChangeLog." (tags: oracle otn virtualization virtualbox) Obama says Cloud and Data Center Consolidation Will Help Curb IT Costs | WHIR Web Hosting Industry News "In the report, he estimated that the federal government could reallocate some $20 billion of IT spending to cloud computing technologies and reduce 'data center infrastructure expenditure by approximately 30 percent' through cloud computing." (tags: cloud obama datacenter) Chris Muir: ADF BC: Creating an "EXISTS" View Criteria Oracle ACE Director Chris Muir shares some ADF tips. (tags: oracle otn oracleace adf) Translation and Multiple Languages with Oracle UCM | Bex Huff Bex says: "Last year, I gave a presentation at Oracle Open World about Creating and Maintaining an Internationalized Web Site. Well, I'm happy to announce that one of the several add-ons to UCM is now available for purchase!" (tags: oracle otn enterprise2.0 ecm oracleace) ORACLENERD: Design Documentation Oracle ACE Chet "ORACLENERD" Justice makes a pledge. (tags: oracle otn oracleace database)

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  • How do you think about an Application Generator? [closed]

    - by Mehdi Sheyda
    I'm designing an application-generating application. It is an application that takes the requirements of customer as inputs , analyzes the requirements, creates classes and produces program files in C#. I am at the beginning of this project and have a long way to go with this application. Do you have an experience with designing similar kinds of projects? What risks might I encounter with this project?

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  • Github Organization Repositories, Issues, Multiple Developers, and Forking - Best Workflow Practices

    - by Jim Rubenstein
    A weird title, yes, but I've got a bit of ground to cover I think. We have an organization account on github with private repositories. We want to use github's native issues/pull-requests features (pull requests are basically exactly what we want as far as code reviews and feature discussions). We found the tool hub by defunkt which has a cool little feature of being able to convert an existing issue to a pull request, and automatically associate your current branch with it. I'm wondering if it is best practice to have each developer in the organization fork the organization's repository to do their feature work/bug fixes/etc. This seems like a pretty solid work flow (as, it's basically what every open source project on github does) but we want to be sure that we can track issues and pull requests from ONE source, the organization's repository. So I have a few questions: Is a fork-per-developer approach appropriate in this case? It seems like it could be a little overkill. I'm not sure that we need a fork for every developer, unless we introduce developers who don't have direct push access and need all their code reviewed. In which case, we would want to institute a policy like that, for those developers only. So, which is better? All developers in a single repository, or a fork for everyone? Does anyone have experience with the hub tool, specifically the pull-request feature? If we do a fork-per-developer (or even for less-privileged devs) will the pull-request feature of hub operate on the pull requests from the upstream master repository (the organization's repository?) or does it have different behavior? EDIT I did some testing with issues, forks, and pull requests and found that. If you create an issue on your organization's repository, then fork the repository from your organization to your own github account, do some changes, merge to your fork's master branch. When you try to run hub -i <issue #> you get an error, User is not authorized to modify the issue. So, apparently that work flow won't work.

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  • How accurate is "Business logic should be in a service, not in a model"?

    - by Jeroen Vannevel
    Situation Earlier this evening I gave an answer to a question on StackOverflow. The question: Editing of an existing object should be done in repository layer or in service? For example if I have a User that has debt. I want to change his debt. Should I do it in UserRepository or in service for example BuyingService by getting an object, editing it and saving it ? My answer: You should leave the responsibility of mutating an object to that same object and use the repository to retrieve this object. Example situation: class User { private int debt; // debt in cents private string name; // getters public void makePayment(int cents){ debt -= cents; } } class UserRepository { public User GetUserByName(string name){ // Get appropriate user from database } } A comment I received: Business logic should really be in a service. Not in a model. What does the internet say? So, this got me searching since I've never really (consciously) used a service layer. I started reading up on the Service Layer pattern and the Unit Of Work pattern but so far I can't say I'm convinced a service layer has to be used. Take for example this article by Martin Fowler on the anti-pattern of an Anemic Domain Model: There are objects, many named after the nouns in the domain space, and these objects are connected with the rich relationships and structure that true domain models have. The catch comes when you look at the behavior, and you realize that there is hardly any behavior on these objects, making them little more than bags of getters and setters. Indeed often these models come with design rules that say that you are not to put any domain logic in the the domain objects. Instead there are a set of service objects which capture all the domain logic. These services live on top of the domain model and use the domain model for data. (...) The logic that should be in a domain object is domain logic - validations, calculations, business rules - whatever you like to call it. To me, this seemed exactly what the situation was about: I advocated the manipulation of an object's data by introducing methods inside that class that do just that. However I realize that this should be a given either way, and it probably has more to do with how these methods are invoked (using a repository). I also had the feeling that in that article (see below), a Service Layer is more considered as a façade that delegates work to the underlying model, than an actual work-intensive layer. Application Layer [his name for Service Layer]: Defines the jobs the software is supposed to do and directs the expressive domain objects to work out problems. The tasks this layer is responsible for are meaningful to the business or necessary for interaction with the application layers of other systems. This layer is kept thin. It does not contain business rules or knowledge, but only coordinates tasks and delegates work to collaborations of domain objects in the next layer down. It does not have state reflecting the business situation, but it can have state that reflects the progress of a task for the user or the program. Which is reinforced here: Service interfaces. Services expose a service interface to which all inbound messages are sent. You can think of a service interface as a façade that exposes the business logic implemented in the application (typically, logic in the business layer) to potential consumers. And here: The service layer should be devoid of any application or business logic and should focus primarily on a few concerns. It should wrap Business Layer calls, translate your Domain in a common language that your clients can understand, and handle the communication medium between server and requesting client. This is a serious contrast to other resources that talk about the Service Layer: The service layer should consist of classes with methods that are units of work with actions that belong in the same transaction. Or the second answer to a question I've already linked: At some point, your application will want some business logic. Also, you might want to validate the input to make sure that there isn't something evil or nonperforming being requested. This logic belongs in your service layer. "Solution"? Following the guidelines in this answer, I came up with the following approach that uses a Service Layer: class UserController : Controller { private UserService _userService; public UserController(UserService userService){ _userService = userService; } public ActionResult MakeHimPay(string username, int amount) { _userService.MakeHimPay(username, amount); return RedirectToAction("ShowUserOverview"); } public ActionResult ShowUserOverview() { return View(); } } class UserService { private IUserRepository _userRepository; public UserService(IUserRepository userRepository) { _userRepository = userRepository; } public void MakeHimPay(username, amount) { _userRepository.GetUserByName(username).makePayment(amount); } } class UserRepository { public User GetUserByName(string name){ // Get appropriate user from database } } class User { private int debt; // debt in cents private string name; // getters public void makePayment(int cents){ debt -= cents; } } Conclusion All together not much has changed here: code from the controller has moved to the service layer (which is a good thing, so there is an upside to this approach). However this doesn't look like it had anything to do with my original answer. I realize design patterns are guidelines, not rules set in stone to be implemented whenever possible. Yet I have not found a definitive explanation of the service layer and how it should be regarded. Is it a means to simply extract logic from the controller and put it inside a service instead? Is it supposed to form a contract between the controller and the domain? Should there be a layer between the domain and the service layer? And, last but not least: following the original comment Business logic should really be in a service. Not in a model. Is this correct? How would I introduce my business logic in a service instead of the model?

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  • Best Software Development Methodology Environment for Fresh Graduates

    - by newbie
    I am looking online for IT-related jobs and most of the time, they are indicating the need that the candidate must have an experience in certain software development methodology (SCRUM, RAD, Waterfall, Agile, etc). Truly, different companies have different needs. What do you think is the best environment / software development methodology for a fresh graduate to be part of so that they could really be a good programmer? What will be avoided?

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