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  • How to filter and intercept Linux packets by using net_dev_add() API?

    - by Khajavi
    I'm writing ethernet network driver for linux. I want to receive packets, edit and resend them. I know how to edit the packet in packet_interceptor function, but how can I drop incoming packets in this function?? #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/ip.h> #include <net/sock.h> struct packet_type my_proto; int packet_interceptor(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { // I dont want certain packets go to upper in net_devices for further processing. // How can I drop sk_buff here?! return 0; } static int hello_init( void ) { printk(KERN_INFO "Hello, world!\n"); my_proto.type = htons(ETH_P_ALL); my_proto.dev = NULL; my_proto.func = packet_interceptor; dev_add_pack(&my_proto); return 0; } static void hello_exit(void) { dev_remove_pack(&my_proto); printk(KERN_INFO "Bye, world\n"); } module_init(hello_init); module_exit(hello_exit);

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  • NULL pointer dereference in swiotlb_unmap_sg_attrs() on disk IO

    - by Inductiveload
    I'm getting an error I really don't understand when reading or writing files using a PCIe block device driver. I seem to be hitting an issue in swiotlb_unmap_sg_attrs(), which appears to be doing a NULL dereference of the sg pointer, but I don't know where this is coming from, as the only scatterlist I use myself is allocated as part of the device info structure and persists as long as the driver does. There is a stacktrace to go with the problem. It tends to vary a bit in exact details, but it always crashes in swiotlb_unmap_sq_attrs(). I think it's likely I have a locking issue, as I am not sure how to handle the locks around the IO functions. The lock is already held when the request function is called, I release it before the IO functions themselves are called, as they need an (MSI) IRQ to complete. The IRQ handler updates a "status" value, which the IO function is waiting for. When the IO function returns, I then take the lock back up and return to request queue handling. The crash happens in blk_fetch_request() during the following: if (!__blk_end_request(req, res, bytes)){ printk(KERN_ERR "%s next request\n", DRIVER_NAME); req = blk_fetch_request(q); } else { printk(KERN_ERR "%s same request\n", DRIVER_NAME); } where bytes is updated by the request handler to be the total length of IO (summed length of each scatter-gather segment).

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  • Why is the value of __name__ changing after assignment to sys.modules[__name__]?

    - by martineau
    While trying to do something similar to what's in the ActiveState recipe titled Constants in Python by Alex Martelli, I ran into an unexpected side-effect that assigning a class instance to an entry in sys.modules apparently has in Python 2.7 -- namely that doing so apparent changes the value of __name__ to None as illustrated in the following code fragment: class _test(object): pass import sys print '__name__: %r' % __name__ # __name__: '__main__' sys.modules[__name__] = _test() print '__name__: %r' % __name__ # __name__: None if __name__ == '__main__': # never executes... import test print "done" I'd like to understand why this is happening. I don't believe it was that way in Python 2.6 and earlier versions since I have some older code where apparently the if __name__ == '__main__': conditional worked as expected following the assignment (but no longer does). FWIW, I also noticed that the name _class is getting rebound from a class object to None, too, after the assignment. Also seems odd to me that they're being rebound to 'None' rather than disappearing altogether... Update: I'd like to add that any workarounds for achieving the effect of if __name__ == '__main__':, given what happens would be greatly appreciated. TIA!

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  • Magento - Code Question

    - by user349550
    I will have publications (news papers), under these publications there will be editions [location and language] and under these there will be offers and offers will have products. currently i have created all as modules i.e. publication to add / edit /delete publication, edition to add / edit/ update editions and so on. the problem is how can i get list of all publication when I am creating a edition and same way how can i get list of edition and publication when i am creating a offer. please help/ regards, saurabh

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  • How to add visible menu item from php code (drupal)

    - by uta
    I have a content type with important "created" date field. And I have a menu link (in primary links) which is link to page that shows list of all nodes of my content type. (http://example.com/mycontenttype) I want to have menu links (visible in primary links) to each year when nodes of my content type are displayed (http://example.com/mycontenttype/2010). And I want to add these menu links from mymodule_nodeapi function, when the node is creating and only if it has a "created" date of new year. I know that I can create a pathes in mymodule_menu function, but it doesn't create a visible menu item. (Maybe I can somehow set parent_link_id or something else to do it?)

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  • What would cause the "gi" module to be missing from python?

    - by Catalin Dumitru
    After some not so clever editing of the default Python version in Ubuntu, from 2.7 to 3.2, I ended up breaking my entire system. After my computer imploded and everything stopped working, I tried to revert back my changes (by linking /usr/bin/python2.7 to /usr/bin/python and changing the default version in /usr/share/python/debian_defaults back to 2.7) but some things are still broken. For example when I type "import gi" in the python interpreter I get the fallowing message : >>> import gi Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named gi >>> error which appears with some programs too (eg: gnome tweak tool). I have tried re-installing python both from the software center and from sources, but the same error persists. Python -- version now returns : Python 2.7.2 and also some software packages which depend on python 2.7 are now working (for example the software center), but some things are still broken. Is there anything I can do to completely re-install python 2.7 as the default version?

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  • On installing nvidia drivers on 12.10 I get "Bad return status for module build on kernel: 3.5.0-19-generic (x86_64)"

    - by james
    New Ubuntu user - just recently made the mistake of trying a different nvidia driver. I'd managed to get the last (nvidia-current) one working through software sources a few weeks ago. The other day I tried to cross over to nvidia-experimental-310 and this produced a system error. Swapping back and forth between proprietary drivers now always causes an error and I can't get any of them to work. Installing through the terminal I get this error message every time: Building initial module for 3.5.0-19-generic Error! Bad return status for module build on kernel: 3.5.0-19-generic (x86_64) Consult /var/lib/dkms/nvidia-experimental-310/310.14/build/make.log for more information On rebooting, I end up with the crappy screen resolution and the thick black border around the screen. I use gksudo software-properties-gtk to bring up sources, where I can change back to the nouveau driver, which restores my screen. After that I can't find /var/lib/dkms/nvidia-experimental-310/310.14/build/make.log so I can't tell you what's inside. Any ideas what might be preventing the nvidia driver from installing? SOLUTION FOUND Okay - so I have a workaround. This is what has worked: Upgrade to kernel 3.7.0 as detailed here upgrade to latest version of the nvidia drivers as detailed here No idea what was happening with kernel 3.5.0-19, but this seems to be better. A little slower maybe on boot, but after days of messing around it's nice to have something that works.

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  • How do I display a view as if it's the front page via a module?

    - by Justin
    I have a simple view that feeds a home page. I have a custom module that registers some specific URLs in hook_menu that I pass into my module so I can pass them as arguments into the view. I can get the module to display the view all right, but it doesn't use the teaser/is_front view that outputs when I access the home page. I looked through the APIs but I can't seem to figure out how I can output the view via my module as if it's the front page, meaning $is_front is true and the teasers would appear. The reason I'm not passing in the arguments via the URL bar into the view itself is: My argument list is known and finite The argument order is mixed, meaning I will sometimes have /argument1, /argument1/argument2 or just /argument2. I only want to capture the first level URL as an argument for specific, known strings (e.g. I don't want to pass /admin into my view but I do want to pass in /los-angeles, which I register in the menu system via hook_menu in my module) Here are some examples to make this more clear: /admin - loads the admin page /user - loads the login page /boston - passes into the first argument of the view; shows in front/teaser mode / - shows view with no arguments /bread - passes into argument 2 of the view; shows in front/teaser mode /boston/bread - Passes into argument 1 and 2 of the view; shows in front/teaser mode Maybe I'm going about this the wrong way? Or perhaps there is a way to have a module load a view and somehow set front/teaser mode? Details: Drupal 6, PHP 5, MySQL 5, Views, CCK

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  • DDD principlers and ASP.NET MVC project design

    - by kaivalya
    Two part questions I have a product aggregate that has; Prices PackagingOptions ProductDescriptions ProductImages etc I have modeled one product repository and did not create individual repositories for any of the child classes. All db operations are handled through product repository. Am I understanding the DDD concept correctly so far? Sometimes the question comes to my mind that having a repository for lets say packaging options could make my life easier by directly fetching a the packaging option from the DB by using its ID instead of asking the product repository to find it in its PackagingOptions collection and give it to me.. Second part is managing the edit create operations using ASP.MVC frame work I am currently trying to manage all add edit remove of these child collections of product through product controller(sound right?). One challenge I am now facing is; If I edit a specific packaging option of product through mydomain/product/editpackagingoption/10 I have access to the id of the packaging option But I don't have the ID of the product it self and this forces me to write a query to first find the product that has this specific packaging option then edit that product and the revelant packaging option. I can do this as all packaging option have their unique ID but this would fail if I have collections that don't have unique ID. That feels very wrong.. The next option I thought of is sending both the product and packaging option IDs on the url like; mydomain/product/editpackagingoption/3/10 But I am not sure if that is a good design either. So I am at a point that I am a bit confused. might be having fundamental misunderstandings around all of this... I would appreciate if you bear with the long question and help me put this together. thanks!

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  • warnings emitted during 'easy_install'

    - by Matt Anderson
    When I easy_install some python modules, warnings such as: <some module>: module references __file__ <some module>: module references __path__ <some module>: module MAY be using inspect.trace <some module>: module MAY be using inspect.getsourcefile sometimes get emitted. Where (what package / source file) do these messages come from? Why is referencing __file__ or __path__ considered a bad thing?

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  • zend_navigation and modules

    - by Grant Collins
    Hi, I am developing an application at the moment with zend and I have seperated the app into modules. The default module is the main site where unlogged in users access and have free reign to look around. When you log in, depending on the user type you either go to module A or module B, which is controlled by simple ACLs. If you have access to Module A you can not access Module B and visa versa. Both user types can see the default module. Now I want to use Zend_Navigation to manage the entire applications navigation in all modules. I am not sure how to go about this, as all the examples that I have seen work within a module or very simple application. I've tried to have my navigation.xml file look like this: <configdata> <navigation> <label>Home</label> <controller>index</controller> <action>index</action> <module>default</module> <pages> <tour> <label>tour</label> <controller>tour</controller> <action>index</action> <module>default</module> </tour> <blog> <label>blog</label> <url>http://blog.mysite.com</url> </blog> <support> <label>Support</label> <controller>support</controller> <action>index</action> <module>default</module> </support> </pages> </navigation> </configdata> This if fine for the default module, but how would I go about the other modules to this navigation page? Each module has it's own home page, and others etc. Would I be better off adding a unique navigation.xml file for each module that is loaded in the preDispatch plugin that I have written to handle my ACLs?? Or keep them in one massive navigation file? Any tips would be fantastic. Thanks, Grant

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  • Why won't my Broadcom BCM4312 LP-PHY work with the STA driver?

    - by Jackson Taylor
    I tried the steps here for a 4312: https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx Both of these: sudo modprobe -r b43 ssb wl sudo modprobe wl return: FATAL: Module wl not found. FATAL: Error running install command for wl (this one is only for the second one actually) I tried the broadcom-sta, didn't work. What's confusing is down below in the next steps for STA with internet access it says to use the bcmwl one. So I install that and it succeeds but with some errors: sudo apt-get install bcmwl-kernel-source Reading package lists... Done Building dependency tree Reading state information... Done The following package was automatically installed and is no longer required: module-assistant Use 'apt-get autoremove' to remove it. The following NEW packages will be installed: bcmwl-kernel-source 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/1,181 kB of archives. After this operation, 3,609 kB of additional disk space will be used. Selecting previously unselected package bcmwl-kernel-source. (Reading database ... 168005 files and directories currently installed.) Unpacking bcmwl-kernel-source (from .../bcmwl-kernel-source_5.100.82.112+bdcom-0ubuntu3_amd64.deb) ... Setting up bcmwl-kernel-source (5.100.82.112+bdcom-0ubuntu3) ... Loading new bcmwl-5.100.82.112+bdcom DKMS files... Building only for 3.5.0-21-generic Building for architecture x86_64 Module build for the currently running kernel was skipped since the kernel source for this kernel does not seem to be installed. ERROR: Module b43 does not exist in /proc/modules ERROR: Module b43legacy does not exist in /proc/modules ERROR: Module ssb does not exist in /proc/modules ERROR: Module bcm43xx does not exist in /proc/modules ERROR: Module brcm80211 does not exist in /proc/modules ERROR: Module brcmfmac does not exist in /proc/modules ERROR: Module brcmsmac does not exist in /proc/modules ERROR: Module bcma does not exist in /proc/modules FATAL: Module wl not found. FATAL: Error running install command for wl update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.5.0-21-generic jtaylor991@jtaylor991-whiteHP:~$ sudo modprobe wl FATAL: Module wl not found. FATAL: Error running install command for wl Then I do the modprobe wl commands listed above and it gives the above listed errors. It didn't work with the broadcom-sta driver either. I installed the b43 ones but nothing happened, and I don't know why so those are still installed. firmware-b43legacy-installer, b43-fwcutter and firmware-b43-lpphy-installer (yes it is a LP-PHY) are currently installed. If I go into System Settings Software Sources Additional Drivers it says "Using Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (proprietary) But bcmwl-kernel-source isn't installed. I could try again but I remember rebooting and it still said this. What's funny is it found wireless networks during the Ubuntu setup/installation, I don't remember if I got it to connect or not though. I think it kept asking for a password when I put it in (yes it was right I showed password and looked at it) so I just ignored it. But right now the Enable Wireless option in the top right is just gone, it's just Enable Networking and I'm on ethernet on this HP Pavilion dv4-1435dx right here. If I run rfkill list it shows: 0: hp-wifi: Wireless LAN Soft blocked: no Hard blocked: no It was hard blocked at the beginning but unblocking it makes no change. Also it's a touch sensitive button, and it appears to be always orange no matter if it's enabled or not because when I touch it the hard blocked changes between yes and no in rfkill list. I think it was blue for a minute at one point. What is going on?!?! Help me! Lol, thanks for any and all of your time guys. Oh yeah this is Ubuntu 12.10 fresh install.

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  • How to store Role Based Access rights in web application?

    - by JonH
    Currently working on a web based CRM type system that deals with various Modules such as Companies, Contacts, Projects, Sub Projects, etc. A typical CRM type system (asp.net web form, C#, SQL Server backend). We plan to implement role based security so that basically a user can have one or more roles. Roles would be broken down by first the module type such as: -Company -Contact And then by the actions for that module for instance each module would end up with a table such as this: Role1 Example: Module Create Edit Delete View Company Yes Owner Only No Yes Contact Yes Yes Yes Yes In the above case Role1 has two module types (Company, and Contact). For company, the person assigned to this role can create companies, can view companies, can only edit records he/she created and cannot delete. For this same role for the module contact this user can create contacts, edit contacts, delete contacts, and view contacts (full rights basically). I am wondering is it best upon coming into the system to session the user's role with something like a: List<Role> roles; Where the Role class would have some sort of List<Module> modules; (can contain Company, Contact, etc.).? Something to the effect of: class Role{ string name; string desc; List<Module> modules; } And the module action class would have a set of actions (Create, Edit, Delete, etc.) for each module: class ModuleActions{ List<Action> actions; } And the action has a value of whether the user can perform the right: class Action{ string right; } Just a rough idea, I know the action could be an enum and the ModuleAction can probably be eliminated with a List<x, y>. My main question is what would be the best way to store this information in this type of application: Should I store it in the User Session state (I have a session class where I manage things related to the user). I generally load this during the initial loading of the application (global.asax). I can simply tack onto this session. Or should this be loaded at the page load event of each module (page load of company etc..). I eventually need to be able to hide / unhide various buttons / divs based on the user's role and that is what got me thinking to load this via session. Any examples or points would be great.

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  • .Net Application & Database Modularity/Reuse

    - by Martaver
    I'm looking for some guidance on how to architect an app with regards to modularity, separation of concerns and re-usability. I'm working on an application (ASP.Net, C#) that has distinctly generic chunks of functionality, that I'd love to be able to lift out, all layers, into re-usable components. This means the module handles the database schema, data access, API, everything so that the next time I want to use it I can just register the module and hook into it. Developing modules of re-usable functionality is a no-brainer, but what is really confusing me is what to do when it comes to handling a core re-usable database schema that serves the module's functionality. In an ideal world, I would register a module and it would ensure that the associated database schema exists in the DB. I would code on the assumption that the tables exist, calling the module's functionality through the DLL, agnostic of the database layer. Kind of like Enterprise Library's Caching/Logging Application Block, which can create a DB schema in the target DB to use as a data store. My Questions is: What do you think is the best way to achieve this, firstly, in terms design architecture, and secondly solution structure. What patterns/frameworks do you know that exist & support this kind of thing? My thoughts so far: I mostly use Entity Framework and SQL Server DB Projects. I thought about a 'black box' approach to modules of functionality. I could use use a code-first approach in EF4, and use the ObjectContext to create a database when the module is initialized. However this means that all of the entities that my module encapsulates would be disconnected from the rest of the application because they belonged to an abstracted ObjectContext. Further - Creating appropriate indexes and references between domain entities and the module's entities would be impossible to do practically. I've thought of adopting Enterprise Library and creating my own Application Blocks. I'm not sure how this would play nice with Entity Framework (if at all) though. I like the idea of building on proven patterns & practices to encapsulate established, reusable functionality. I thought of abandoning Entity Framework for the Module, and just creating a separate DB schema for the module with its own set of stored procedures & ADO.Net. Then deploying the script at run-time if interrogation shows that it doesn't exist. But once again, for application developing outside of the application, I would want to use Entity Framework and I would have to use the module separately, disconnected from the domain ObjectContext. Has anyone had experience developing these sorts of full-stack modules? What advice can you offer? Am I biting off more than I can chew?

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  • PPP connection between PalmOS and Ubuntu (over ttyUSB0?) without crashy "visor" kernel module

    - by Chris Boyle
    I have a Palm Treo 680 which I'd like to use as a media remote, using Palm MPC. Almost the exact instructions on that page used to work perfectly for establishing a PPP connection over the USB cable; I think I last tried it in Ubuntu 9.04 (Jaunty). In Karmic, I find that /dev/ttyUSB{0,1} are not present by default, and when I modprobe visor to get them, the Palm immediately crashes and reboots, as seen in Ubuntu bug 522753 (it reboots again as long as the module is still loaded and USB is still connected). The usbserial module has the same result. From reading that bug and elsewhere, it appears that the visor module is abandoned, and jpilot and friends use some other approach to talk to PalmOS over USB these days, which might not even involve a ttyUSB device. My question is, therefore: How do I create a PPP connection between PalmOS and Karmic without crashing the Palm?

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  • Fedora12 Slow USB 2.0 Write Speed, ehci_hcd module is missing.

    - by MA1
    I am using Fedora 12, the problem i am facing is USB 2.0 write speed. I have a dual boot system with Window XP and Fedora 12. USB 2.0 write speed in Windows XP is much faster then what i am getting in Fedora 12. After some googling i came to know that ehci_hcd module is missing/not present in my system. ehci_hcd module is neither loaded nor it is present in the available list of modules. Can someone guide me how to fix this issue? Is ehci_hcd have something to do with USB 2.0 write speed or? Should i have to recompile the kernel and add/enable he ehci_hcd module?

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  • Can I make Puppet's module-to-file mapping to start searching at the top of the modules tree?

    - by John Siracusa
    Consider these two Puppet module files: # File modules/a/manifests/b/c.pp class a::b::c { include b::c } # File modules/b/manifests/c.pp class b::c { notify { "In b::c": } } It seems that when Puppet hits the include b::c directive in class a::b::c, it searches for the corresponding *.pp file by looking backwards from the current class and decides that it find the correct file located at ../../b/c.pp. In other words, it resolves b::c to the same *.pp file that the include b::c statement appears in: modules/a/manifests/b/c.pp I expected it (and would like it) to instead find and load the file modules/b/manifests/c.pp. Is there a way to make Puppet do this? If not, it seems to me that module names may not contain any other module names anywhere within them, which is a pretty surprising restriction.

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  • How to install PyQt on Mac OS X 10.6.

    - by Jebagnanadas
    Hello all, I'm quite new to Mac OS X. when i tried to install PyQt on Mac Os X after installing python 3.1, Qt 4.6.2 and SIP 4.10.1 i encounter the following error when i execute $python3 configure.py command. Determining the layout of your Qt installation... This is the GPL version of PyQt 4.7 (licensed under the GNU General Public License) for Python 3.1 on darwin. Type '2' to view the GPL v2 license. Type '3' to view the GPL v3 license. Type 'yes' to accept the terms of the license. Type 'no' to decline the terms of the license. Do you accept the terms of the license? yes Checking to see if the QtGui module should be built... Checking to see if the QtHelp module should be built... Checking to see if the QtMultimedia module should be built... Checking to see if the QtNetwork module should be built... Checking to see if the QtOpenGL module should be built... Checking to see if the QtScript module should be built... Checking to see if the QtScriptTools module should be built... Checking to see if the QtSql module should be built... Checking to see if the QtSvg module should be built... Checking to see if the QtTest module should be built... Checking to see if the QtWebKit module should be built... Checking to see if the QtXml module should be built... Checking to see if the QtXmlPatterns module should be built... Checking to see if the phonon module should be built... Checking to see if the QtAssistant module should be built... Checking to see if the QtDesigner module should be built... Qt v4.6.2 free edition is being used. Qt is built as a framework. SIP 4.10.1 is being used. The Qt header files are in /usr/include. The shared Qt libraries are in /Library/Frameworks. The Qt binaries are in /Developer/Tools/Qt. The Qt mkspecs directory is in /usr/local/Qt4.6. These PyQt modules will be built: QtCore. The PyQt Python package will be installed in /Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/site-packages. PyQt is being built with generated docstrings. PyQt is being built with 'protected' redefined as 'public'. The Designer plugin will be installed in /Developer/Applications/Qt/plugins/designer. The PyQt .sip files will be installed in /Library/Frameworks/Python.framework/Versions/3.1/share/sip/PyQt4. pyuic4, pyrcc4 and pylupdate4 will be installed in /Library/Frameworks/Python.framework/Versions/3.1/bin. Generating the C++ source for the QtCore module... sip: Usage: sip [-h] [-V] [-a file] [-b file] [-c dir] [-d file] [-e] [-g] [-I dir] [-j #] [-k] [-m file] [-o] [-p module] [-r] [-s suffix] [-t tag] [-w] [-x feature] [-z file] [file] Error: Unable to create the C++ code. Anybody here installed PyQt on Mac OS X 10.6.2 successfully.. Any help would be much appreciated.. Thanks in advance..

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  • Key ATG architecture principles

    - by Glen Borkowski
    Overview The purpose of this article is to describe some of the important foundational concepts of ATG.  This is not intended to cover all areas of the ATG platform, just the most important subset - the ones that allow ATG to be extremely flexible, configurable, high performance, etc.  For more information on these topics, please see the online product manuals. Modules The first concept is called the 'ATG Module'.  Simply put, you can think of modules as the building blocks for ATG applications.  The ATG development team builds the out of the box product using modules (these are the 'out of the box' modules).  Then, when a customer is implementing their site, they build their own modules that sit 'on top' of the out of the box ATG modules.  Modules can be very simple - containing minimal definition, and perhaps a small amount of configuration.  Alternatively, a module can be rather complex - containing custom logic, database schema definitions, configuration, one or more web applications, etc.  Modules generally will have dependencies on other modules (the modules beneath it).  For example, the Commerce Reference Store module (CRS) requires the DCS (out of the box commerce) module. Modules have a ton of value because they provide a way to decouple a customers implementation from the out of the box ATG modules.  This allows for a much easier job when it comes time to upgrade the ATG platform.  Modules are also a very useful way to group functionality into a single package which can be leveraged across multiple ATG applications. One very important thing to understand about modules, or more accurately, ATG as a whole, is that when you start ATG, you tell it what module(s) you want to start.  One of the first things ATG does is to look through all the modules you specified, and for each one, determine a list of modules that are also required to start (based on each modules dependencies).  Once this final, ordered list is determined, ATG continues to boot up.  One of the outputs from the ordered list of modules is that each module can contain it's own classes and configuration.  During boot, the ordered list of modules drives the unified classpath and configpath.  This is what determines which classes override others, and which configuration overrides other configuration.  Think of it as a layered approach. The structure of a module is well defined.  It simply looks like a folder in a filesystem that has certain other folders and files within it.  Here is a list of items that can appear in a module: MyModule: META-INF - this is required, along with a file called MANIFEST.MF which describes certain properties of the module.  One important property is what other modules this module depends on. config - this is typically present in most modules.  It defines a tree structure (folders containing properties files, XML, etc) that maps to ATG components (these are described below). lib - this contains the classes (typically in jarred format) for any code defined in this module j2ee - this is where any web-apps would be stored. src - in case you want to include the source code for this module, it's standard practice to put it here sql - if your module requires any additions to the database schema, you should place that schema here Here's a screenshots of a module: Modules can also contain sub-modules.  A dot-notation is used when referring to these sub-modules (i.e. MyModule.Versioned, where Versioned is a sub-module of MyModule). Finally, it is important to completely understand how modules work if you are going to be able to leverage them effectively.  There are many different ways to design modules you want to create, some approaches are better than others, especially if you plan to share functionality between multiple different ATG applications. Components A component in ATG can be thought of as a single item that performs a certain set of related tasks.  An example could be a ProductViews component - used to store information about what products the current customer has viewed.  Components have properties (also called attributes).  The ProductViews component could have properties like lastProductViewed (stores the ID of the last product viewed) or productViewList (stores the ID's of products viewed in order of their being viewed).  The previous examples of component properties would typically also offer get and set methods used to retrieve and store the property values.  Components typically will also offer other types of useful methods aside from get and set.  In the ProductViewed component, we might want to offer a hasViewed method which will tell you if the customer has viewed a certain product or not. Components are organized in a tree like hierarchy called 'nucleus'.  Nucleus is used to locate and instantiate ATG Components.  So, when you create a new ATG component, it will be able to be found 'within' nucleus.  Nucleus allows ATG components to reference one another - this is how components are strung together to perform meaningful work.  It's also a mechanism to prevent redundant configuration - define it once and refer to it from everywhere. Here is a screenshot of a component in nucleus:  Components can be extremely simple (i.e. a single property with a get method), or can be rather complex offering many properties and methods.  To be an ATG component, a few things are required: a class - you can reference an existing out of the box class or you could write your own a properties file - this is used to define your component the above items must be located 'within' nucleus by placing them in the correct spot in your module's config folder Within the properties file, you will need to point to the class you want to use: $class=com.mycompany.myclass You may also want to define the scope of the class (request, session, or global): $scope=session In summary, ATG Components live in nucleus, generally have links to other components, and provide some meaningful type of work.  You can configure components as well as extend their functionality by writing code. Repositories Repositories (a.k.a. Data Anywhere Architecture) is the mechanism that ATG uses to access data primarily stored in relational databases, but also LDAP or other backend systems.  ATG applications are required to be very high performance, and data access is critical in that if not handled properly, it could create a bottleneck.  ATG's repository functionality has been around for a long time - it's proven to be extremely scalable.  Developers new to ATG need to understand how repositories work as this is a critical aspect of the ATG architecture.   Repositories essentially map relational tables to objects in ATG, as well as handle caching.  ATG defines many repositories out of the box (i.e. user profile, catalog, orders, etc), and this is comprised of both the underlying database schema along with the associated repository definition files (XML).  It is fully expected that implementations will extend / change the out of the box repository definitions, so there is a prescribed approach to doing this.  The first thing to be sure of is to encapsulate your repository definition additions / changes within your own module (as described above).  The other important best practice is to never modify the out of the box schema - in other words, don't add columns to existing ATG tables, just create your own new tables.  These will help ensure you can easily upgrade your application at a later date. xml-combination As mentioned earlier, when you start ATG, the order of the modules will determine the final configpath.  Files within this configpath are 'layered' such that modules on top can override configuration of modules below it.  This is the same concept for repository definition files.  If you want to add a few properties to the out of the box user profile, you simply need to create an XML file containing only your additions, and place it in the correct location in your module.  At boot time, your definition will be combined (hence the term xml-combination) with the lower, out of the box modules, with the result being a user profile that contains everything (out of the box, plus your additions).  Aside from just adding properties, there are also ways to remove and change properties. types of properties Aside from the normal 'database backed' properties, there are a few other interesting types: transient properties - these are properties that are in memory, but not backed by any database column.  These are useful for temporary storage. java-backed properties - by nature, these are transient, but in addition, when you access this property (by called the get method) instead of looking up a piece of data, it performs some logic and returns the results.  'Age' is a good example - if you're storing a birth date on the profile, but your business rules are defined in terms of someones age, you could create a simple java-backed property to look at the birth date and compare it to the current date, and return the persons age. derived properties - this is what allows for inheritance within the repository structure.  You could define a property at the category level, and have the product inherit it's value as well as override it.  This is useful for setting defaults, with the ability to override. caching There are a number of different caching modes which are useful at different times depending on the nature of the data being cached.  For example, the simple cache mode is useful for things like user profiles.  This is because the user profile will typically only be used on a single instance of ATG at one time.  Simple cache mode is also useful for read-only types of data such as the product catalog.  Locked cache mode is useful when you need to ensure that only one ATG instance writes to a particular item at a time - an example would be a customers order.  There are many options in terms of configuring caching which are outside the scope of this article - please refer to the product manuals for more details. Other important concepts - out of scope for this article There are a whole host of concepts that are very important pieces to the ATG platform, but are out of scope for this article.  Here's a brief description of some of them: formhandlers - these are ATG components that handle form submissions by users. pipelines - these are configurable chains of logic that are used for things like handling a request (request pipeline) or checking out an order. special kinds of repositories (versioned, files, secure, ...) - there are a couple different types of repositories that are used in various situations.  See the manuals for more information. web development - JSP/ DSP tag library - ATG provides a traditional approach to developing web applications by providing a tag library called the DSP library.  This library is used throughout your JSP pages to interact with all the ATG components. messaging - a message sub-system used as another way for components to interact. personalization - ability for business users to define a personalized user experience for customers.  See the other blog posts related to personalization.

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  • Unable to use OpenGL or install nVidia driver on openSUSE 12.2

    - by djechelon
    I have an ASUS N76VZ laptop with 12.2 openSUSE and GeForce GT650M card. I found that KDE doesn't allow me to use OpenGL rendering. I tried to install nVidia's driver from script but once it writes the xorg.conf file I'm unable to boot desktop. I have the following errors in system log Oct 30 08:28:13 RAYNOR kdm[2727]: X server died during startup Oct 30 08:28:13 RAYNOR kdm[2727]: X server for display :0 cannot be started, session disabled I noticed that the /etc/X11/xorg.conf backup file was empty, so I renamed the new xorg.conf and left none: the desktop booted!!! How can I fix OpenGL rendering with or without driver installation? [Update]: Xorg.0.log says [ 1434.207] compiled for 4.0.2, module version = 1.0.0 [ 1434.207] Module class: X.Org Server Extension [ 1434.207] (II) NVIDIA GLX Module 304.60 Sun Oct 14 20:44:54 PDT 2012 [ 1434.207] (II) Loading extension GLX [ 1434.207] (II) LoadModule: "record" [ 1434.207] (II) Loading /usr/lib64/xorg/modules/extensions/librecord.so [ 1434.207] (II) Module record: vendor="X.Org Foundation" [ 1434.207] compiled for 1.12.3, module version = 1.13.0 [ 1434.207] Module class: X.Org Server Extension [ 1434.207] ABI class: X.Org Server Extension, version 6.0 [ 1434.207] (II) Loading extension RECORD [ 1434.207] (II) LoadModule: "dri" [ 1434.207] (II) Loading /usr/lib64/xorg/modules/extensions/libdri.so [ 1434.207] (II) Module dri: vendor="X.Org Foundation" [ 1434.207] compiled for 1.12.3, module version = 1.0.0 [ 1434.207] ABI class: X.Org Server Extension, version 6.0 [ 1434.207] (II) Loading extension XFree86-DRI [ 1434.207] (II) LoadModule: "nvidia" [ 1434.208] (II) Loading /usr/lib64/xorg/modules/drivers/nvidia_drv.so [ 1434.208] (II) Module nvidia: vendor="NVIDIA Corporation" [ 1434.208] compiled for 4.0.2, module version = 1.0.0 [ 1434.208] Module class: X.Org Video Driver [ 1434.208] (II) NVIDIA dlloader X Driver 304.60 Sun Oct 14 20:24:42 PDT 2012 [ 1434.208] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs [ 1434.208] (++) using VT number 8 [ 1434.320] (EE) No devices detected. [ 1434.320] Fatal server error: [ 1434.320] no screens found [ 1434.320] Please consult the The X.Org Foundation support at http://wiki.x.org for help.

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  • Software Center not opening after installing Ice from Peppermint

    - by darkapex
    Software Center is not opening since I installed "Ice" software (used in Peppermint OS) from ppa:kendalltweaver/peppermint and i keep getting this error - $ software-center ERROR:root:DebFileApplication import Traceback (most recent call last): File "/usr/share/software-center/softwarecenter/db/__init__.py", line 3, in <module> from debfile import DebFileApplication File "/usr/share/software-center/softwarecenter/db/debfile.py", line 25, in <module> from softwarecenter.db.application import Application, AppDetails File "/usr/share/software-center/softwarecenter/db/application.py", line 28, in <module> from softwarecenter.backend.channel import is_channel_available File "/usr/share/software-center/softwarecenter/backend/channel.py", line 25, in <module> from softwarecenter.distro import get_distro File "/usr/share/software-center/softwarecenter/distro/__init__.py", line 194, in <module> distro_instance = _get_distro() File "/usr/share/software-center/softwarecenter/distro/__init__.py", line 169, in _get_distro module = __import__(distro_id, globals(), locals(), [], -1) ImportError: No module named Peppermint

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  • Calling a GWT service in a different context than the GWT Module Base?

    - by Epaga
    I have a GWT module with the X-GWT-Module-Base http://host:8080/foo/ and would like to call a (GWT) service which is located at http://host:8080/bar/. The reason is for example that I want to be able to share a GWT service between two different GWT client projects. All I've gotten to work so far is if the service is located within the module context, i.e. http://host:8080/foo/bar works fine, using @RemoteServiceRelativePath("bar") in my service interface. It seems that the @RemoteServiceRelativePath only allows a value relative to the module base URL...so is there some other way to accomplish what I'm trying to accomplish?

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  • How to extend/patch an existing module or package?

    - by nat
    I want to extend some locale-specific features of a python application named OpenERP. All I need is implementing a third party module.function that would be called every time OpenERP calls locale.setlocale() function without changing neither OpenERP nor locale module source code. The only way I can imagine is provide a module named locale.py inside main application package dir, but It seems that is an unpythonic workaround.

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  • How do I make a module in PLT Scheme?

    - by kunjaan
    I tried doing this: #lang scheme (module duck scheme/base (provide num-eggs quack) (define num-eggs 2) (define (quack n) (unless (zero? n) (printf "quack\n") (quack (sub1 n))))) But I get this error: module: illegal use (not at top-level) in: (module duck scheme/base (provide num-eggs quack) (define num-eggs 2) (define (quack n) (unless (zero? n) (printf "quack\n") (quack (sub1 n))))) what is the correct way?

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  • My hardware needs a module to be blacklisted to work, how can I get this fix shipped?

    - by Jorge Castro
    I have an Acer Timeline 1830T. When I install 10.10 and 11.04 it needs to have the acer-wmi module blacklisted for wireless to work. I think I need to file a bug on the linux kernel but I am not sure. I've heard the term "quirk" being thrown around by developers when it comes to fixing something so that it works on certain pieces of hardware. Is this indeed a kernel bug? What steps should I take to ensure that this gets reported so that everyone with my laptop doesn't have to go through this over and over?

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