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Articles indexed in November 2011

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• Mise à jour Systèmes n°10 de l'exercice 2012 – 25 octobre 2011

  - by swalker

  Logiciels Systèmes, Stockage et Serveurs Sun Modifications des tarifs : Oracle Révision de la tarification internationale pour les matériels et logiciels Systèmes Révision de la tarification internationale pour les matériels et logiciels hérités Oracle Que devez-vous faire ? Chaque mise à jour Systèmes inclut des modifications de la tarification Systèmes et deux fichiers : le document d'annonce (PDF) et les détails de l'annonce (XLS). Les numéros d'identification indiqués dans les documents d'annonce vous permettent de retrouver toutes les références produit concernées par l'annonce en question dans la feuille de calcul. Informations complémentaires Rendez-vous régulièrement sur la page des Tarifs Systèmes du portail OPN pour en savoir plus sur ces mises à jour et connaître les derniers tarifs et les dernières ressources applicables. * Avertissement : Les informations sur la tarification des systèmes Oracle sont des informations confidentielles Oracle, qui vous sont transmises en vertu des modalités de votre contrat Oracle PartnerNetwork.

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• Forms&Reports upgrade characterset issues

  - by Lukasz Romaszewski

  Hello,This quick post is based on my findings during recent IMC workshops, especially those related to upgrading the Forms 6i/9i/10g applications to Forms 11g platform. The upgrade process itself is pretty straightforward and it basically requires recompiling your Forms application with a latest version of frmcmp tool. For some cases though, especially when you migrate from Forms 6i which is a client-server architecture to a 3-tier web solution (Forms 11g), you need to rewrite some parts of your code to make it run on new platform. The things you need to change range from reimplementing (using webutil library) typical client-site functionality like local IO operation, access to WinAPI, invoking DLLs etc. to changing deprecated or obsolete APIs like RUN_PRODUCT to RUN_REPORT_OBJECT. To automate those changes Oracle provides complete Java API  which allows you to manipulate the code and structure of you modules (JDAPI). To make it even easier we can use Forms Migration Assistant tool (written in Java using JDAPI) which is able to replace all occurrences of old API entries with their 11g equivalents or warn you when the replacement is not possible. You can also add your own replacement definitions in the search_replace.properties file. But you need to be aware of some issues that can be encountered using this tool. First of all if you are using some hard-coded text inside your triggers you may notice that after processing them by the Migration Assistant tool the national characters may be lost. This is due to the fact that you need to explicitly tell Java application (which MA really is) what kind of characterset it should use to read those text properly. In order to do that just add to a script calling MA the following line:  export JAVA_TOOL_OPTIONS=-Dfile.encoding=<JAVA_ISO_ENCODING>  when the particular encoding must match the NLS_LANG in your Forms Builder environment (for example for Polish characterset you need to use ISO-8859-2).Second issue you can encounter related to national charactersets is lack of national symbols in you reports after migration. This can be solved by adding appropriate NLS_LANG entry in your reports environment. Sometimes instead of particular characterset you see "Greek characters" in your reports. This is just default font used by reports engine instead of the one defined in your report. To solve it you must copy fonts definitions from your old environment (e.g. Forms 10g installation) to appropriate directory in new installation (usually AFM folder). For more information about this and other issues please refer to https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=BULLETIN&id=1297012.1at My Oracle Support site. That's all for today, stay tuned for more posts on this topic! Lukasz

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• What do I need to develop a PHP extension in lampp?

  - by Fernando Costa

  Actually I'm dealing with a trouble in my system, I have to delivery the system to clients and it was built in PHP, JS, ShellScript and SQL. I would like to encrypt the code or obfuscate it from eyes of others! Then someone from the community told me about build my own PHP extension, it sounds to me as a great idea, since it will not be with the main code of the system. But I have a problem doing this way, if a programmer get in the extensions and find it, all the hard work has gone. Then I'm here to ask again about this matter. What is the best way to hide my Business Logic from third parties? I know that has stuffs like IonCube, Zend Guard, and many others. But I'm looking something that I can build myself. Is PHP extension the right way to follow? Or some Half SaaS system, with dependencies (Business Logic) in a remote server? About the environment OS: Kernel Linux 2.6.37.1-1.2 - LAMPP (Apache 2.2, MySQL 5.5 PHP 5.3.8) In php generally the extension is located at /php/ext/ but in lampp I have no idea where it is, I just found a folder /opt/lampp/lib/php/extensions/ is that right place?

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• Is there an open-source project that can be an example of well-written code?

  - by Renato Dinhani Conceição

  The title express my intention. I want to see the code of a big project that can be considered a good example of good code writing (clean code, modularization, comments, etc.) I don't want to know if the tool is good or not, but only how the code IS. There is some project that can be used as example? I'm asking this because must great projects have their flaws, some pieces or entire code that appears to be writing to a new person presented to system development (I think that maybe everyone do this in some part of their projects).

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• vim + Ruby on Rails: how do you bounce among those 4-5 files you're currently working on?

  - by glitch

  I'm just starting to get familiar with vim, and I'd like to use it as my primary Rails development tool. As a Visual Studio and RubyMine user, I find a lot of stuff to be missing from the barebones vim installation, and therefore I went ahead and attempted to soup it up with plugins such as: rails.vim tcomment ruby-vim NERDtree and a couple of others. The issue is that I still don't quite get the average work-flow of using vim as one's Rails IDE. In RubyMine (again, similarly to Visual Studio) I have a series of tabs always open, containing the main files I'm switching among, and I additionally use NERDtree to open files from the folder structure. I tried opening them as new tabs, but the tab system in vim is just a lot more awkward than that in real IDEs. (I haven't seen vim pros in action, but I imagine that they'd not be relying on tabs, but using numerous splits instead, keeping at least a couple of files per split and switching between them with CTRL + ^. Is that the case?) So, at the end of the day, how do I really squeeze the most from vim if I want to be able to quickly access several files at once? Thank you!

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• See number of SVN Checkins per folder

  - by Farseeker

  I have a very large SVN repository (working copy of several gb) that has just reached its 20,000th checkin. As a bit of an interesting statistic for our team (and to partly celebrate our 20,000th checkin) I'd like to make a graph showing which folders in the repository have had the most checkins. Is there any way to do this? We mostly use integrated SVN clients in our IDE and Tortoise SVN, but I'm willing to get other tools for this one-off thing.

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• How many tiers should my models have in a DB driven web app?

  - by Hanno Fietz

  In my experience, the "Model" in MVC is often not really a single layer. I would regularly have "backend" models and "frontend" models, where the backend ones would have properties that I want to hide from the UI code, and the frontend ones have derived or composite properties which are more meaningful in the context of the UI. Recently, I have started to introduce a third layer in between when database normalization created tables that did not really match the conceptual domain objects anymore. In those projects I have model classes that are equivalent with the DB structure, these become components of objects that represent the domain model, and finally these are filtered and amended for displaying information to the user. Are there patterns or guidelines for how, when and why to organize the data model across application layers?

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• PHP rand function (or not so rand)

  - by Badr Hari

  I was testing PHP rand function to write on a image. Of course the output shows that it's not so random. The code I used: <?php header('Content-Type: image/png'); $lenght = 512; $im = imagecreatetruecolor($lenght, $lenght); $blue = imagecolorallocate($im, 0, 255, 255); for ($y = 0; $y < $lenght; $y++) { for ($x = 0; $x < $lenght; $x++) { if (rand(0,1) == 0) { imagesetpixel($im, $x, $y, $blue); } } } imagepng($im); imagedestroy($im); ?> My question is, if I use image width/lenght (variable $lenght in this example) number like 512, 256 or 1024, it is very clear that it's not so random. When I change the variable to 513 for an example, it is so much harder for human eye to detect it. Why is that? What is so special about these numbers? 512: 513: Edit: I'm running xampp on Windows to test it.

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• Architecture Question

  - by katie77

  I am writing a rules/eligibility Module. I have 2 sets of data, one is the customer data and the other is the customer products data. Customer data to Customer products data is one to many. Now I have to go through a set of Eligibility rules for each of this Customer product data. For each customer products data, I can say the customer is eligible for that product or decline the eligibility and should move on to the next product record. So in all the rules, I need to have access to customer and customer product data(the particular record that the rules are being executed against). Since all the rules can either approve a product or decline a product, I created an interface with those 2 methods and is implementing the this interface for all the rules. I am passing the Customer data and one product data for all the rules (because rules should be executed on each row of customer product data). An Ideal situation would be having the customer and customer product data available for the rule instead of passing them to each rule. What is the best way of doing this in-terms of architecture?

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• How do you avoid name similarities between your classes and the native ones?

  - by Oscar

  I just ran into an "interesting problem", which I would like your opinion about: I am developing a system and for many reasons (meaning: abstraction, technology independence, etc) we create our own types for exchanging information. For instance: if there is a method which is called SendEmail and is invoked by the business logic, it way have a parameter of type OurCompany.EMailMessage, which is an object which is completely technology independent and contains only "business relevant data" (for instance, no information abut head encoding). Inside the SendEmail function, we get this information from our EMailMEssage object and create a MailMessage (this one is technolgy specific) object so it can be sent over the network. As you can already notice, our class has a very similar name to the "native" language class. The problem is: this is exactly what they are, email messages, so it is hard to find another meaningful name for them. Do you have this problem often? How do you manage it? Edit: @mgkrebbs just commented about using fully qualified names. This is our current approach, but a little bit too verbose, IMHO. I would like something cleaner, if possible.

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• What's the best way to acknowledge many FOSS sources in a single project?

  - by boost

  I have a project which uses a large number of LGPL, Artistic and other open-source licensed libraries. What's the canonical (i.e. the "standard") way of acknowledging multiple sources in a single project download? Also, some of the sources I've used are from sites where using the code is okay, but publishing the source isn't. What's the usual manner of attribution in that case, and the usual manner of making the source available in an open-source project?

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• How do you compare programming job offers from companies in different countries?

  - by Danny Tuppeny

  This isn't really a programmer-specific question, but I'm not sure of a more appropriate place, and I think the users of this site are best able to answer the question in the context of programmers. Relocating to the US seems fairly common in the programming industry. I live in the UK, and maybe one day, I might do it too. So, if that day comes - how would you go about comparing job offers? Benefits are fairly easy to compare, but given the differences in cost of living, how would you go about comparing salaries and the quality of living you'll have? In a country where the cost of living is lower, you might be able to accept a lower salary (based on exchange rate) and still have the same quality of living. But what can you do to ensure this? In some cases, you may even take a "pay rise" in terms of exchange rate, but end up far worse off. How can you compare job offers across different countries to get an idea of the salary you would need in order to not feel you've gone "backwards"?

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• How to make transition from one-man to small team successfull

  - by si2w

  I have started a big project 1 1/2 ago. It's time to have some help to face the future challenges. Actually I'm the engineer, the architect, the dba, the sysadmin etc... The transistion is not so simple and it's difficult to find the good person. When we will find this person, what's the best ways to manage him/her to give enough freedom to be happy and productive but have a clean, fast, reuseable, working, ... code ? Is there good books you advice ? Thanks !

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• Is reference to bug/issue in commit message considered good practice?

  - by Christian P

  I'm working on a project where we have the source control set up to automatically write notes in the bug tracker. We simply write the bug issue ID in the commit message and the commit message is added as a note to the bug tracker. I can see only a few downsides for this practice. If sometime in the future the source code gets separated from the bug tracking software (or the reported bugs/issues are somehow lost). Or when someone is looking in the history of commits but doesn't have access to our bug tracker. My question is if having a bug/issue reference in the commit message is considered good practice? Are there some other downsides?

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• What is a clean Agile (Scrum) Sprint Presentation?

  - by negarnil

  Suppose someone of your development team is presenting a sprint to the customer but he is having web connection problems such that a complete story cannot be presented. For the sake of the cleanness of the presentation, do you help your colleague suggesting possible solutions and try to fix it in the moment? Or is it kind of messy? May be the customer (who is "part" of the team) will understand? Why?

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• Can't install Ubuntu in a HP DV6 Laptop

  - by EApubs

  I just bought an HP DV6 6011tx (link) Laptop... I formated the disk through Windows and prepared for installing Ubuntu... When I insert the live CD, it shows the ubuntu start screen and then everything goes black (no cursor... Just like the screen is switched off (but the system is working)) When i try to install from the USB, it says Live media is not found! Some times it also give a black screen like the CD... Have any idea how to fix this? Thanks

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• Is there animation software available for Ubuntu?

  - by Robert Low

  Is there commercial-grade computer animation software available for Ubuntu, similar to the professional software sold for the Windows operating system? This question goes out to those of you who may be using such software professionally. My daughter recently graduated from the Art Institute of Seattle, and needs to put together an animation portfolio in order to interest employers in the field. As you know, such software is usually provided by the employer and the costs are high - several thousand dollars. I suggested that she investigate Ubuntu as a possible way to acquire the tools she needs. But, since I have no idea what might be available, either as open source or proprietary animation software, I am reaching out to the Ubuntu community for help in the hope someone who is using such software can help her. Thank you for reading this post, and for any information you might have.

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• Black frame around screen after HDMI connection failure

  - by Wolter Hellmund

  I was trying to watch a movie in my computer through the TV, so I connected both with an HDMI cable. I was unable to have a successful setup (the colors were all weird on the TV and the screen size, incorrect), I tried many resolutions using the nvidia-settings application and somehow my screen got framed by a black border and after that I have been unable to remove it, even after restarting the computer and not being connected to the HDMI cable anymore. I am using Ubuntu 11.10 amd64, my GPU is an nVidia GeForce 8600M GT and I am using the propietary driver version 280. The problem is due to some setting with my account only. I logged in to the guest session and the resolution is right there. Also, my desktop "thinks" the resolution is right (i.e. 1280x800), but it must be right in another scale because there is pixel area occupied by the black frame.

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• What is the correct way to restart udev in Ubuntu?

  - by zerkms

  I've changed the name of my eth1 interface to eth0. How to ask udev now to re-read the config? service udev restart and udevadm control --reload-rules don't help. So is there any valid way except of rebooting? (yes, reboot helps with this issue) UPD: yes, I know I should prepend the commands with sudo, but either one I posted above changes nothing in ifconfig -a output: I still see eth1, not eth0. UPD 2: I just changed the NAME property of udev-rule line. Don't know any reason for this to be ineffective. There is no any error in executing of both commands I've posted above, but they just don't change actual interface name in ifconfig -a output. If I perform reboot - then interface name changes as expected. UPD 3: let I explain all the case better ;-) For development purposes I write some script that clones virtual machines (VirtualBox-driven) and pre-sets them up in some way. So I perform a command to clone VM, start it and as long as network interface MAC is changed - udev adds the second rule to network persistent rules. Right after machine is booted for the first time there are 2 rules: eth0, which does not exist, as long as it existed in the original VM image MAC eth1, which exists, but all the configuration in all files refers to eth0, so it is not that good for me So I with sed delete the line with eth0 (it is obsolete and useless in cloned image) and replace eth1 with eth0. So currently I have valid persistent rule, but there is still eth1 in /dev. The issue: I don't want to reboot the machine (it will take another time, which is not good thing on building-VM-stage) and just want to have my /dev rebuilt with some command so I have ready-to-use VM without any reboots.

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• Unity doesn't autostart on second X screen

  - by Nonoo

  I have two Nvidia cards both with 2 heads and both configured as TwinView, so I have Screen0 and Screen1 in my xorg.conf. ccsm sees both screens (displays them in the Screens drop-down at the top left), but Unity starts only on Screen0 by default. The displays on Screen1 only show the default white screen and default X mouse cursor, when I hover over them. Is this the normal, expected behavior? Can I start Unity on Screen1 automatically without running custom shell scripts (like DISPLAY=:0.1 compiz --replace)?

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• Where is "open with..." in Nautilus?

  - by perebal

  In Ubuntu 11.04 I usually edit my *.fig files by clicking on the icons. The application (script) which opened the file was texfig. This script was chosen by "open with..." in nautilus. But now there is no possibilities to choose other applications than the predefined ones appropriate to the mimetype. How can I define a default application (or a self made script) in nautilus for the x-xfig mimetype?

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• Canon MG6100 series USB printer receives job but doesn't physically print

  - by Old-linux-fan

  Printer MP6150 driver installed itself upon plugging in the printer. Printer is recognized (lsusb shows it) but does not mount. If the printer is recognized, the driver must be working (or?), but something is blocking the system from mounting the printer. Tried the usual things: power of printer, restart Ubuntu etc. Listed below result of lsusb and fstab: hans@kontor-linux:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 004: ID 04a9:174a Canon, Inc. Bus 002 Device 002: ID 1058:1001 Western Digital Technologies, Inc. External Hard Disk [Elements] Bus 004 Device 002: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser hans@kontor-linux:~$ sudo cat /etc/fstab [sudo] password for hans: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda6 during installation UUID=eaf3b38d-1c81-4de9-98d4-3834d674ff6e / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=93a667d3-6132-45b5-ad51-1f8a46c5b437 none swap sw 0 0

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• Desktop not showing after playing with compiz

  - by Mark

  Having successfully installed Ubuntu 11.04 I decided to look into improving look and feel of the unity desktop. I could find no option to introduce any nice effects with the standard install, but a google session suggested Compiz would do the job. I installed this and selected the "Wobbly windows" option and this worked fine. After a while I thought I'd try some of the other available effects (can't remember which but may have been cube desktop) but this resulted in no windows showing at all. I now have just blank wall paper with no icons or menus. There are no error messages and right clicking the desktop produces a small context menu but nothing else. Rebooting brings me back to a blank desktop with just wallpaper. I do not know where to start.

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• Adding custom applications to Gnome launcher

  - by Shaftoe2702

  Looking for a utility that allows me insert an item into the list of applications that GNOME knows about. For example: I have downloaded Eclipse EE (I have some very special plugins that I need to work with, and those plugins don't "like" the version available in the default repository). I'm using GNOME 3, on Ubuntu 11.10. So I want to execute Eclipse w/o opening a terminal and running it. It must be something very simple.

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• Can't ping Ubuntu laptop from my LAN

  - by oskar

  My laptop has Ubuntu 10.10 and is connected to my router with full internet access, yet I can't ping it from other computers on my LAN. I tried the following: I can successfully ping those other computers from my Ubuntu laptop, so I didn't accidentally connect to someone else's network. I can successfully ping my Ubuntu laptop from itself, though I don't know if that means anything. I haven't messed with iptables at all, so it currently doesn't have any rules set that would cause it to reject anything. I made a DHCP reservation for my laptop's MAC address in my router to make sure I was always using the correct IP address. Please note that I am using a "command line only" install of Ubuntu, so I can't use any GUI network config tools. The reason I want to ping it is because I am trying to run an NFS server on the laptop, yet despite correctly setting it up I cannot access the NFS volume on another computer because it isn't even visible on the network right now.

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