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  • Junior software developer - How to understand web applications in depth?

    - by nat_gr
    I am currently a junior developer in web applications and specifically in ASP.NET MVC technology. My problem is that the C# senior developer in the company has no experience with this technology and I try to learn without any guidance. I went through all tutorials (e.g music store), codeplex projects and also read Pro ASP.NET MVC 4. However, most of the examples are about CRUD and e-commerce applications. What I don't understand is how dependency injection fits in web applications (I have realized that is not only used for facilitating unit testing) or when I should use a custom model binder or how to model the business logic when there is already a database schema in place. I read the forum quite often and it would very helpful if some experienced developer could give me an insight about how to proceed. Do I need to read some books to understand the overall idea behind web applications? And what kind of application should I start building myself - I don't think it would be useful to create similar examples with the tutorials.

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  • Why does a bash-zenity script has that title on Unity Panel and that icon on Unity Launcher?

    - by Sadi
    I have this small bash script which helps use Infinality font rendering options via a more user-friendly Zenity window. But whenever I launch it I have this "Color Picker" title on Unity Panel together with the icon assigned for "Color Picker" utility. I wonder why and how this is happening and how I can change it? #!/bin/bash # A simple script to provide a basic, zenity-based GUI to change Infinality Style. # v.1.2 # infinality_current=`cat /etc/profile.d/infinality-settings.sh | grep "USE_STYLE=" | awk -F'"' '{print $2}'` sudo_password="$( gksudo --print-pass --message 'Provide permission to make system changes: Enter your password to start or press Cancel to quit.' -- : 2>/dev/null )" # Check for null entry or cancellation. if [[ ${?} != 0 || -z ${sudo_password} ]] then # Add a zenity message here if you want. exit 4 fi # Check that the password is valid. if ! sudo -kSp '' [ 1 ] <<<"${sudo_password}" 2>/dev/null then # Add a zenity message here if you want. exit 4 fi # menu(){ im="zenity --width=500 --height=490 --list --radiolist --title=\"Change Infinality Style\" --text=\"Current <i>Infinality Style</i> is\: <b>$infinality_current</b>\n? To <i>change</i> it, select any other option below and press <b>OK</b>\n? To <i>quit without changing</i>, press <b>Cancel</b>\" " im=$im" --column=\" \" --column \"Options\" --column \"Description\" " im=$im"FALSE \"DEFAULT\" \"Use default settings - a compromise that should please most people\" " im=$im"FALSE \"OSX\" \"Simulate OSX rendering\" " im=$im"FALSE \"IPAD\" \"Simulate iPad rendering\" " im=$im"FALSE \"UBUNTU\" \"Simulate Ubuntu rendering\" " im=$im"FALSE \"LINUX\" \"Generic Linux style - no snapping or certain other tweaks\" " im=$im"FALSE \"WINDOWS\" \"Simulate Windows rendering\" " im=$im"FALSE \"WIN7\" \"Simulate Windows 7 rendering with normal glyphs\" " im=$im"FALSE \"WINLIGHT\" \"Simulate Windows 7 rendering with lighter glyphs\" " im=$im"FALSE \"VANILLA\" \"Just subpixel hinting\" " im=$im"FALSE \"CLASSIC\" \"Infinality rendering circa 2010 - No snapping.\" " im=$im"FALSE \"NUDGE\" \"Infinality - Classic with lightly stem snapping and tweaks\" " im=$im"FALSE \"PUSH\" \"Infinality - Classic with medium stem snapping and tweaks\" " im=$im"FALSE \"SHOVE\" \"Infinality - Full stem snapping and tweaks without sharpening\" " im=$im"FALSE \"SHARPENED\" \"Infinality - Full stem snapping, tweaks, and Windows-style sharpening\" " im=$im"FALSE \"INFINALITY\" \"Infinality - Standard\" " im=$im"FALSE \"DISABLED\" \"Act without extra infinality enhancements - just subpixel hinting\" " } # option(){ choice=`echo $im | sh -` # if echo $choice | grep "DEFAULT" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"DEFAULT\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "OSX" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"OSX\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "IPAD" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"IPAD\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "UBUNTU" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"UBUNTU\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "LINUX" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"LINUX\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "WINDOWS" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"WINDOWS\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "WIN7" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"WINDOWS7\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "WINLIGHT" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"WINDOWS7LIGHT\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "VANILLA" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"VANILLA\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "CLASSIC" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"CLASSIC\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "NUDGE" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"NUDGE\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "PUSH" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"PUSH\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "SHOVE" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"SHOVE\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "SHARPENED" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"SHARPENED\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "INFINALITY" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"INFINALITY\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # if echo $choice | grep "DISABLED" > /dev/null; then sudo -Sp '' sed -i "s/USE_STYLE=\"${infinality_current}\"/USE_STYLE=\"DISABLED\"/g" '/etc/profile.d/infinality-settings.sh' <<<"${sudo_password}" fi # } # menu option # if test ${#choice} -gt 0; then echo "Operation completed" fi # exit 0

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  • Why a 10 years old software still is so slow even today?

    - by Cawas
    I just noted this question due to a game (which happens to be Diablo 2), but the matter of fact is: why is my brand new mac book pro, made in 2009 with latest technology (tho it's the cheapest one) can't rival my computer which used to run this much faster back in 2000? Really, it was much faster on my AMD K6 450 back in those days, and I could even run two clients at same time with no slow down. I've always had the feeling this machine was slow, but this is a very odd way to attest it. Granted, the machine is smaller, runs on wifi and "boots" way faster thanks to sleep mode. But other than that, what have we evolved after all?! I'm pretty sure this shouldn't be graphical card's fault. Sure if I buy latest technology it will run fast, and probably most people here can confirm this and won't even understand my question. But the thing is, all the hardware is supposedly much faster and better than the stuff from 10 years ago. The software and operating system became more complex, but also more well refined. Now I'm trying a piece of software that is actually 10 years old and it's not getting any better results! Why?

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  • Should "closed as duplicate" software programming be extreme or functional? [migrated]

    - by Web Developer
    I'm a web developer loving this site for it's potential, and it's Coffee look . I was reading a great question, that is this: click here and noticed 8 moderators tagged it as DUPLICATED! The question was closed! Obviously it isn't and I'm going to explain why if needed but it can be seen: the question is unique, is the case/story of a young who have SPECIFIC experience with C++ , VB and Assembler and asking, knowing this specifications an answer (It is not a general question like "hey I'm young can I do the programmer??") Let me know your opinion! do you think this question should or should not be closed? And let's think about also the people not only the "data" and "cases covered" ... do you think this is important too? or is better to keep a place where people doesn't count?

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  • Is it legal and ethical to reverse engineer software to port it to another system?

    - by Igor Zinov'yev
    I love gaming, I love games that allow modding and I love linux. But the fact that most games right now are targeted for windows (consoles aside), most mods and modding tools are also targeted for windows. There is a certain modder called Boris Vorontsov that makes a famous visual overhaul mod series called ENB. What he does (or I think he does) is he enhances or changes the behavior of classes defined in the d3d9.dll library. Needless to say it almost never works under wine. Recently I have asked him if he would ever release his version of the library under some open license, and he said "no". Now that I think of it, even if he did release his code, he would have surely faced some legal problems. Now there is my question. Is it legal and ethical to reverse engineer his version of the library to adapt the wine's open source version of d3d9.dll to be able to run his mods?

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  • How to get bearable 2D and 3D performance on AMD Radeon HD 6950?

    - by l0b0
    I have had an AMD Radeon HD 6950 (i.e., Cayman series) for a couple years now, and I have tried a lot of combinations of drivers and settings with terrible results. I'm completely at a loss as to how to proceed. The open source driver has much better 2D performance, but it offloads all OpenGL rendering to the CPU. What I've tried so far: All the latest stable Ubuntu releases in the period, plus one Linux Mint release. All the latest stable AMD Catalyst Proprietary Display Drivers, and currently 13.1. The unofficial wiki installation instructions for every Ubuntu version and the semi-official Ubuntu instructions. All the tips and tweaks I could find for Minecraft (Optifine, reducing settings to minimum), VLC (postprocessing at minimum, rendering at native video size), Catalyst Control Center (flipped every lever in there) and X11 (some binary toggles I can no longer remember). Results: Typically 13-15 FPS in Minecraft, 30 max (100+ in Windows with the same driver version). Around 10 FPS in Team Fortress 2 using the official Steam client. Choppy video playback, in Flash and with VLC. CPU use goes through the roof when rendering video (150% for 1080p on YouTube in Chromium, 100% for 1080p H264 in VLC). glxgears shows 12.5 FPS when maximized. fgl_glxgears shows 10 FPS when maximized. Hardware details from lshw: Motherboard ASUS P6X58D-E CPU Intel Core i7 CPU 950 @ 3.07GHz (never overclocked; 64 bit) 6 GB RAM Video card product "Cayman PRO [Radeon HD 6950]", vendor "Hynix Semiconductor (Hyundai Electronics)" 2 x 1920x1200 monitors, both connected with HDMI. I feel I must be missing something absolutely fundamental here. Is there no accelerated support for anything on 64-bit architectures? Does a dual monitor completely mess up the driver? $ fglrxinfo display: :0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: AMD Radeon HD 6900 Series OpenGL version string: 4.2.11995 Compatibility Profile Context $ glxinfo | grep 'direct rendering' direct rendering: Yes I am currently using the open source driver, with the following results: Full frame rate and low CPU load when playing 1080p video. Black screen (but music in the background) in Team Fortress 2. Similar performance in Minecraft as the Catalyst driver. In hindsight obvious, since both end up offloading the rendering to the CPU. My /var/log/Xorg.0.log after upgrading to AMD Catalyst 13.1. Some possibly important lines: (WW) Falling back to old probe method for fglrx (WW) fglrx: No matching Device section for instance (BusID PCI:0@3:0:1) found The generated xorg.conf. The disabled "monitor" 0-DFP9 is actually an A/V receiver, which sometimes confuses the monitor drivers when turned on/off (but not in Windows). All three "monitor" devices are connected with HDMI. Edit: Chris Carter's suggestion to use the xorg-edgers PPA (Catalyst 13.1) resulted in some improvement, but still pretty bad performance overall: Minecraft stabilizes at 13-17 FPS, but at least the CPU load is "only" at 45-60%. Still 150% CPU use for 1080p video rendering on YouTube in Chromium. Massive improvement for 1080p H264 in VLC: 40-50% CPU use and no visible jitter glxgears performance about doubled to 25-30 FPS when maximized. fgl_glxgears still at ~10 FPS when maximized.

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  • Where should SQL/DB Queries be encapsulated in a software system?

    - by Stephen Bennet
    I frequently write small applications (either web based or otherwise) that require heavy database usage. i've attempted various ways of handling where to put the actual sql queries (sort of ad-hoc ORM systems). These include: Models that build themselves up - and only allowing SQL to be inside of a model. A sort of factory style method where the models are built by a factory class that is allowed to know about SQL. A third entity that maps models based on their fields/keys into the database and generates SQL code on the fly based on this. Is there a common knowledge of which method is best? Or another way I have missed? Clearly a lot of it will be based on the context of the system itself, which for me is usually to produce lightweight tools or utility frameworks. In experimenting, I've never found any of them that feel intuitively "right" and not clunky, but I also do not want to go for a full framework such as Django or Ruby - both because the tools I create are in a variety of languages and because they usually do not warrant that level of surrounding footprint.

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  • Why is Safari on my computer rendering all of the colors -- not just for images -- incorrectly?

    - by richardhenry
    I’m not just talking about image color profile issues; every single color that the browser renders is incorrect. It’s like it’s in it’s own color space (or something!). Screenshot: http://drp.ly/DJk1O (Opera, Safari, Chrome, Firefox) Spot the odd one out? Open this up in Photoshop or similar and try using the eyedropper to select the colour. Safari renders the same hex color completely differently. That color is set using a background-color declaration in CSS, so it should be identical in all four of those browsers. Here’s the HTML I was using: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>untitled</title> <style type="text/css"> body { background-color: #114742; } </style> </head> <body> </body> </html> Literally every website I’m viewing with my install of Safari is displaying colors incorrectly. The blue of the bar on Facebook is slightly less rich. This doesn’t occur on any other Macs I’ve tried. Any idea what’s happened to my Safari install?

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  • Why don't research papers that mention custom software release the source code?

    - by Antoine
    Is there a reason why the source code of softwares mentioned in research papers is not released ? I understand that research papers are more about the general idea of accomplishing something than implementation details, but I don't get why they don't release the code. For example, in this paper ends with: Results The human line drawing system is implemented through the Qt framework in C++ using OpenGL, and runs on a 2.00 GHz Intel dual core processor workstation without any additional hardware assistance. We can interactively draw lines while the system synthesizes the new path and texture. Do they keep the source code closed intentionally because of a monetization they intend to make with it, or because of copyright ?

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  • How can I create a 3D model in Java without using modeling software?

    - by Galen Nare
    I am a lightly experienced game developer and this is my first time trying 3D objects in Java for the first time. I have been recently creating and updating games using AWT, Swing, and Graphics, but I want to delve farther into Java. I have looked into Java3D, but it's not what I want. I want to use Images and then crop the Image and place the respective textures in their respective places. I already know how to do the cropping and 2D Image editing, but how do I go 3D?

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  • Junior software developer - How to understand web aplications in depth?

    - by nat_gr
    I am currently a junior developer in web applications and specifically in asp.net mvc technology. My problem is that the c# senior developer in the company has no experience with this technology and I try to learn without any guidance. I went through all tutorials (e.g music store), codeplex projects and also read pro asp.net mvc 4. However, most of the examples are about crud and e-commerce applications. What I don't understand is how dependency injection fits in web applications (I have realized that is not only used for facilitating unit testing) or when i should use a custom model binder or how to model the business logic when there is already a database schema in place. I read the forum quite often and it would very helpful if some experienced developers could give me an insight about how to proceed. Do I need to read some books to understand the overall idea behind web applications? And what kind of application should I start building myself - I don't think it would be useful to create similar examples with the tutorials.

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  • Big Data Appliance X4-2 Release Announcement

    - by Jean-Pierre Dijcks
    Today we are announcing the release of the 3rd generation Big Data Appliance. Read the Press Release here. Software Focus The focus for this 3rd generation of Big Data Appliance is: Comprehensive and Open - Big Data Appliance now includes all Cloudera Software, including Back-up and Disaster Recovery (BDR), Search, Impala, Navigator as well as the previously included components (like CDH, HBase and Cloudera Manager) and Oracle NoSQL Database (CE or EE). Lower TCO then DIY Hadoop Systems Simplified Operations while providing an open platform for the organization Comprehensive security including the new Audit Vault and Database Firewall software, Apache Sentry and Kerberos configured out-of-the-box Hardware Update A good place to start is to quickly review the hardware differences (no price changes!). On a per node basis the following is a comparison between old and new (X3-2) hardware: Big Data Appliance X3-2 Big Data Appliance X4-2 CPU 2 x 8-Core Intel® Xeon® E5-2660 (2.2 GHz) 2 x 8-Core Intel® Xeon® E5-2650 V2 (2.6 GHz) Memory 64GB 64GB Disk 12 x 3TB High Capacity SAS 12 x 4TB High Capacity SAS InfiniBand 40Gb/sec 40Gb/sec Ethernet 10Gb/sec 10Gb/sec For all the details on the environmentals and other useful information, review the data sheet for Big Data Appliance X4-2. The larger disks give BDA X4-2 33% more capacity over the previous generation while adding faster CPUs. Memory for BDA is expandable to 512 GB per node and can be done on a per-node basis, for example for NameNodes or for HBase region servers, or for NoSQL Database nodes. Software Details More details in terms of software and the current versions (note BDA follows a three monthly update cycle for Cloudera and other software): Big Data Appliance 2.2 Software Stack Big Data Appliance 2.3 Software Stack Linux Oracle Linux 5.8 with UEK 1 Oracle Linux 6.4 with UEK 2 JDK JDK 6 JDK 7 Cloudera CDH CDH 4.3 CDH 4.4 Cloudera Manager CM 4.6 CM 4.7 And like we said at the beginning it is important to understand that all other Cloudera components are now included in the price of Oracle Big Data Appliance. They are fully supported by Oracle and available for all BDA customers. For more information: Big Data Appliance Data Sheet Big Data Connectors Data Sheet Oracle NoSQL Database Data Sheet (CE | EE) Oracle Advanced Analytics Data Sheet

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  • Which programming language to develop software for USC that also runs on other OS?? (WINDOWS/OSX)

    - by Marian Lux
    I have skills in JAVA and C#: First i had a closer look to JAVA (Eclipse with Windowbuilder-Plugin) - Swing: But there is no natvie GUI-Support for GTK3 (e.g., HUD seems not to work) Then i was at JAVA - SWT: It is to heavy. I want do code a small app that improves the Ubuntu desktop. I don't want to ship a program with eclipse included. After that i found C# Mono (Monodevelop): GTK-shparp is only for GTK2 available. A GTK3-port will come soon but is it possible to convert the program from GTK2 to GTK3 without extra adaptations? The next bad thing is, that MONO is now dropped from Ubuntu LTS 12.04. So i have no chance that my app would be a default-app in an Ubuntu-Image. (This is also a factor for me to choose a programming language). I know there are other techs but i want to use as programing language JAVA or C#.

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  • So we've got a code review tool, now what can we use for software documents?

    - by Tini
    We're using Subversion as a full CM for code and also for related project documents. We have JIRA and Fisheye. When we wanted to add a peer review tool, we looked at and tested several candidates. Our weighted requirements included both code and document review, but ultimately, the integration with JIRA slanted the scores in Crucible's favor. Atlassian has slammed the door on ever supporting Word or PDF in Crucible. I've tested several workaround methods to make Crucible work for documents without success. (The Confluence/Crucible plug-in was deprecated by Atlassian, so that option is out, too.) I haven't found a plugin for Crucible that adds this functionality, so short of writing my own plug-in, Crucible for documents is unworkable. Word Track Changes doesn't provide a method for true collaboration and commenting. Adobe PDF Comment and Markup is interesting, but doesn't provide a great way to keep a permanent quality record of the conversation. We can't go cloud-based, our documents must be locally hosted on our own server only. We're only on Sharepoint 2007. Help! Anyone have a suggestion?

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  • Would adding award points or game features to workplace software be viewed poorly amongst the programming community?

    - by Eric P
    So one of my responsibilities at work is to build an internal tool that helps the workers enter in all their information. It's an enterprise application that is similar to a Windows forms database tool. So it's not much different than like developing a Word + Excel combo application, but the average person in this workgroup is a 20-40 year old woman or a random chatty male type. Plus I know all of these people are heavily involved with Facebook on a daily basis. How bad would it be if I styled my new interface to be similar to what Facebook does. People could get award points and stuff when they fill out different types of forms and basically compete against each other like it was a game. When people had completed one, it would be posted on their wall and everyone could comment/like stuff just like in Facebook. And it would be like they are doing peer reviewing for fun. The rewards would be outstanding I would imagine. These people are so into Facebook and Facebook games that productivity would rise due to them trying to compete and earn points and achievements. Would this be taking advantage of the people by 'tricking them into working harder by giving them a game' or would it be viewed as something that would improve happiness at work?

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  • Why doesn't my graphic card software support 1280*1024?

    - by Allwar
    Hi, I have an external monitor which is an 20" 1280*1024. In windows 7 it works fine with that resolution but in ubuntu it can't. Example: In windows I connect it and activates it, done. In ubuntu I connect and the only resolution that is available is the ones my laptop screen support, 12" 1366*768. My laptop is an asus 1201n. If I force it to use 1280*1024 both screen crashes and i have to force a reboot. When I force it I only force the external monitor, the laptop is already at maximum 1366*768. I connect it throw VGA. ((The graphic card supports 1280*1024 in windows 7, #Fail)) alvar@alvars-laptop:~$ disper -l display DFP-0: HSD121PHW1 resolutions: 320x175, 320x200, 360x200, 320x240, 400x300, 416x312, 512x384, 640x350, 576x432, 640x400, 680x384, 720x400, 640x480, 720x450, 640x512, 700x525, 800x512, 840x525, 800x600, 960x540, 832x624, 1024x768, 1366x768 display CRT-0: CRT-0 resolutions: 320x240, 400x300, 512x384, 680x384, 640x480, 800x600, 1024x768, 1152x864, 1360x768

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  • What is the best way/Software to manage multiple short lived instances of virtual machines ?

    - by Newtopian
    Hi, We have a QA department that have to test our software on multiple combination of OS and DMBS. With Windows spewing out many different versions the combinatorial math of all this can be daunting. So we decided on visualizing our setups but so far it only displaces the problem. The cost of hardware is expensive and we need many different combination far exceeding your server capacity to deliver. Also, these instances are throw away, once the test is complete we no longer need it, furthermore to ensure proper test isolation we should start fresh from a new instance. Lastly we only need a small subset of these system online at any given time. What I am looking for is a way to manage inventory so that our QA staff can order instances to be put online as required and discarded once used. Instances are spawned from a pool of freshly installed systems with the appropriate combination ready to accept our software. It also should be possible for two or more people to start the same instance at the same time, though we could manage without this if it proves too complex to put in place. Finally our budget is pretty thin, we can probably make some purchases but ideally expenditures should be kept to a minimum. To summarize we should be able to : Bring instances online on demand. Ideally should offer queue and scheduling management Destroy instances on demand Keep masters in inventory but not online. Manage large inventory of VMs (30-100 maybe more) with small staff of users (5-10). Allow adding, deleting and changing instances from inventory (bring online, make changes and check back in, or create new and check in). Allow few long lived instances for support tools (normal VM server usage) Thanks for your answers

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  • What are some reasonable arguments in favor of closed source software? [closed]

    - by Goma
    I like a technology (including programming language) but its platform is closed sourece and many times I meet people who ask me, "why do you use a closed source platform, why not use an open source alternative? If there is something wrong it should be with the closed source not with the open source, (as they say)". Actually I don't know how to answer their question. Could anyone tell me a good answer? Why do you use a closed source platform?

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  • Why should most logic be in the monitor objects and not in the thread objects when writing concurrent software in Java?

    - by refuser
    When I took the Realtime and Concurrent programming course our lecturer told us that when writing concurrent programs in Java and using monitors, most of the logic should be in the monitor and as little as possible in the threads that access it. I never really understood why and I really would like to. Let me clarify. In this particular case we had several classes. Lift extends Thread Person extends Thread LiftView Monitor, all methods synchronized. This is nothing we came up with, our task was to implement a lift simulation with persons waiting on different floors, and theses were the class skeletons that were given. Then our lecturer said to implement most of the logic in the monitor (he was talking about class Monitor as THE monitor) and as little as possible in the threads. Why would he make a statement like that?

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  • PDF rendering of images seems to vary from viewer to viewer with blurring?

    - by AndyL
    I'm generating PDF figures in Adobe Illustrator CS5 that include embedded images. I've noticed that the images look dramatically different when I display the same PDF in Preview, Skim or Adobe Reader (I'm on OS X). See screenshots. Adobe Reader displays them "correctly" while Skim and Preview blurs the image out each in a different way. Is there a setting I can set when saving my PDF from Illustrator so that the images are displayed correctly in Skim and Preview? The PDF was generated in Illustrator and saved without any compression or downsampling. The original PDF is here: http://ge.tt/8iZMR2A Adobe Reader 9 Skim 1.3.18 Preview 4.2 Super User's client-side PDF renderer

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  • Paranoid Encryption

    - by Lord Jaguar
    Call me paranoid, but I really like to keep my stuff secret, but readily available on the cloud. So, asking this question. How safe and reliable is encryption software (e.g., truecrypt)? The reason I ask is that, what is I encrypt my data today with this software and after a couple of years, the software is gone ! What happens to my encrypted data? Is it equally safe to AES encrypt using 7-zip? Will it provide the same level or equivalent level of encryption as truecrypt or other encryption software? (I agree truecrypt will be better because of the container encryption it gives.) And what happens if 7-zip shuts down after 5 years? I am sorry if I am sounding paranoid, but I am coming back to my original question... Is there any application/software independent encryption? Meaning, can I encrypt with one software and decrypt with another so that I will not be dependent on just one vendor? I want my encryption to depend ONLY on the password and NOT on the encryption program/software? The next question, can I write my own program that does AES/stronger encryption when I give it a passphrase, so that I don't need to depend on third party software for encryption? If yes, which language supports the same? Can someone give me a heads up as to where to look for in case of writing my own encryption program?

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  • MVC and individual elements of the model under a common base class

    - by Stewart
    Admittedly my experience of using the MVC pattern is limited. It might be argued that I don't really separate the V from the C, though I keep the M separate from the VC to the extent I can manage. I'm considering the scenario in which the application's model includes a number of elements that have a common base class. For example, enemy characters in a video game, or shape types in a vector graphics app. The view wants to render these elements. Of course, the different subclasses call for different rendering. The problem is that the elements are part of the model. Rendering them is conceptually part of the view. But how they are to be rendered depends on parameters of both: Attributes and state of the element are parameters of the model User settings are parameters of the view - and to support multiple platforms and/or view modes, different views may be used What's your preferred way of dealing with this? Put the rendering code in the model classes, passing in any view parameters? Put the rendering code in the view, using a switch or similar to select the right rendering for the model element type? Have some intermediate classes as a model-view interface, of which the model will create objects on demand and the view will then render them? Something else?

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  • How do you explain to an "agile" team that they still need to plan the software they write?

    - by user23157
    This week at work I got agiled yet again. Having gone through the standard agile, TDD, shared ownership, ad hoc development methodology of never planning anything beyond a few user stories on a piece of card, verbally chewing the cud over the technicallities of a 3rd party integration ad nauseam without ever doing any real thinking or due dilligence and architecturally coupling all production code to the first test that comes into anyone's head for the past few months we reach the end of a release cycle and lo and behold the main externally visible feature that we have been developing is too slow to use, buggy, becoming labyrinthinly complex and completely inflexible. During this process "spikes" were done but never documented and not a single architectural design was ever produced (there was no FS, so what the hell eh, if you don't know what you are developing, how can you plan or research it?) - the project passed from pair to pair, each of whom only ever focused on a single user story at a time and well the result was inevitable. To resolve this I went off the radar, went (the dreaded) waterfall, planned, coded and basically didn't swap off the pair and tried as much as I could to work alone - focusing on solid architecture and specifications rather than unit tests which will come later once everything is pinned down. The code is now much better and is actually totally usable, flexible and fast. Certain people seem to have really resented me doing this and have gone out of their way to sabotage my efforts (possibly unconsciously) because it goes against the holy process of agile. So how do you, as a developer, explain to the team that it is not "un-agile" to plan their work, and how do you fit planning into the agile process? (I'm not talking about the IPM; I'm talking about sitting down with a problem and sketching out an end-to-end design that says how a problem should be solved in sufficient detail that anyone who works on the problem knows what architecture and patterns they should be using and where the new code should integrate into existing code)

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