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  • OS X Lion - Installing Oracle 10g Standard Edition

    - by Cellze
    Im trying to install oracle 10g on to OS X Lion, I have previous achieved this on snow leopard with the following http://blog.rayapps.com/2009/09/14/how-to-install-oracle-database-10g-on-mac-os-x-snow-leopard/ The issue im having is that the ulimit settings in the oracle/.bash_profile cannot be modified. I have the following in the bash_profile: export DISPLAY=:0.0 export ORACLE_BASE=$HOME umask 022 # must match `sysctl kern.maxprocperuid` ulimit -Hu 512 ulimit -Su 512 # must match `sysctl kern.maxfilesperproc` ulimit -Hn 10240 ulimit -Sn 10240 Upon applying the bash_profile settings . ~/.bash_profile i get the following error: -bash: ulimit: max user processes: cannot be modify limit: Invalid argument This then results in $ sqlplus / as sysdba not functioning correctly with a Segmentation fault: 11 The output of $ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 10240 pipe size (512 bytes, -p) 1 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 512 virtual memory (kbytes, -v) unlimited If any one knows how I can apply these ulimit settings to the oracle user I have created to allow me to install sqlplus and therefore create a db, that would be great.

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  • Adobe Plugin in Firefox showing grey screen; something to do with range requests on Apache?

    - by Sam Minnée
    I have a web page with a link to a PDF file (target="_blank"). If I click the link, the PDF reader just shows a grey screen within the Firefox browser. If I copy that link and manually open it in a new tab, the PDF will display correctly, and subsequent requests made by clicking the original link now work, suggesting that the problem occurs when loading the file into the cache. It appears as though the Adobe PDF reader plugin is making byte-range requests (I see lots of 206 responses) and I suspect that this may be the cause of the issue. I am running an Apache webserver. Has anyone had problems with Apache and Adobe's byte-range requests? Are there any workarounds?

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  • Converting videos to AVI with AVIDemux for compatibility

    - by Synetech
    I am trying to convert a couple of short videos to AVI (XviD) using AVIDemux. I find that while the resulting videos play fine in VLC, they do not play in an XviD DVD player (nor presumably Xbox 360, PS3, etc.). In fact, they do not even show in Windows Explorer (that is, Explorer cannot read their metadata or display thumbnails). I tried using all three of the AVI Muxer Output Format options, but none worked. Does anyone know what settings to use to produce compatible AVIs with AVIDemux? (I found an old thread where someone complained about AVIs not working on Xbox, but that was a few years ago from an older version.)

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  • FreeNX Server w/ nxagent 3.5 not able to create shadow sessions

    - by Jenna Whitehouse
    I am running a FreeNX server on Ubuntu 11.10 and am unable to do session shadowing. I get the authorization prompt, but the shadow client crashes after. The NX server log in the user's .nx directory is as follows: Error: Aborting session with 'Server is already active for display 3000 If this server is no longer running, remove /tmp/.X3000-lock and start again'. Session: Aborting session at 'Mon Oct 1 14:26:44 2012'. Session: Session aborted at 'Mon Oct 1 14:26:44 2012'. This then deletes the lock file, which is the lock file for the initial Unix session and crashes out. Everything works for a normal session, and shadowing works up to the authorization prompt. I am using this software: Ubuntu 11.10 freenx-server 0.7.3.zgit.120322.977c28d-0~ppa11 nx-common 0.7.3.zgit.120322.977c28d-0~ppa11 nxagent 1:3.5.0-1-2-0ubuntu1ppa8 nxlibs 1:3.5.0-1-2-0ubuntu1ppa8 Any help is appreciated, thanks!

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  • How do I Connect a 30yr-old Tandy 1400LT laptop to the internet?

    - by Clemens Bergmann
    Just for the fun of it, I want to get an old Tandy 1400LT laptop: small monochrome display two floppy drives rs-232c connector "printer" connector connect the thing the internet and use it as an ssh terminal. How would I connect it to the internet? The software should be no problem as it is a 386 hardware. There should be a small linux distribution which can be run on it. But how would I phisically connect the hardware? It has no ethernet port. Has someone experience with Serial/Paralel-to-ethernet converters?

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  • How can I separate the user interface from the business logic while still maintaining efficiency?

    - by Uri
    Let's say that I want to show a form that represents 10 different objects on a combobox. For example, I want the user to pick one hamburguer from 10 different ones that contain tomatoes. Since I want to separate UI and logic, I'd have to pass the form a string representation of the hamburguers in order to display them on the combobox. Otherwise, the UI would have to dig into the objects fields. Then the user would pick a hamburguer from the combobox, and submit it back to the controller. Now the controller would have to find again said hamburguer based on the string representation used by the form (maybe an ID?). Isn't that incredibly inefficient? You already had the objects you wanted to pick one from. If you submited to the form the whole objects, and then returned a specific object, you wouldn't have to refind it later on since the form already returned a reference to that object. Moreover, if I'm wrong and you actually should send the whole object to the form, how can I isolate UI from logic?

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  • how do I remove the last connected users from the lightdm greeter list

    - by Christophe Drevet
    With gdm3, I was able to remove the last connected users from the list by removing the file '/var/log/ConsoleKit/history' With lightdm, the last users appears even when : removing /var/log/ConsoleKit/history removing /var/lib/lightdm/.cache/unity-greeter/state Where does lightdm store this list ? Edit: It seems like it's using the content from the last command. Then purging the content of the file /var/log/wtmp is sufficient to remove any previously connected user from the list : # > /var/log/wtmp But, after doing this, I have the unwanted side effect that users loging in via lightdm doesn't appears at all in this list. I must say that I'm in a enterprise network environment using NIS. Edit2: Well, it seems that lightdm uses wtmp to display recent network users list, but does not update it. So, lightdm will show a network user only if it logged in in another fashion (ssh, login), like I did on this computer before. cf: https://bugs.launchpad.net/lightdm/+bug/871070 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648604 Edit3: I just added the following line to the file /etc/pam.d/lightdm To force lightdm to store users in wtmp : session optional pam_lastlog.so silent

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  • Hebrew (utf8) characters in windows cmd console

    - by epeleg
    I previously asked this Q: utf8 hebrew on mysql console on debian (via putty on windows) And managed to get it working by starting mysql with --default-character-set=utf8 and setting putty to show utf8 as well. Now I need to do the same but on a windows server. The data is again the same but when I start mysql with --default-character-set=utf8 it I see multuple characters where I am supposed to see hebrew. I think the problem is with the set up of windows cmd console that it does not properly display utf8. any ideas ?

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  • What is Ubuntu's Definition of a "Registered Application"?

    - by Tom
    I've run into this a few times when installing apps from source, and during the occasional hack with update-alternatives. So far, it's only been a minor annoyance (ie, not got in the way of the end-goal) but it's now a frustration as it's pointing to a hole in my knowledge-base... so when I get a message that 'foo' is "not a registered application" (or I can't use foo's default icon cuz Ubuntu has no knowledge of 'foo'): (1) what defines a "registered application"? (2) how can I define an application installed from source (and likely residing in $HOME/bin/app-name) such that it packs the same functionality as a package installed from a .deb? (if the solution is not self-evident from answer 1) Example: I download and unpack daily dev builds of sublime-text-2 to /home/tom/bin/sublime-text-2. I've created a *.desktop file with appropriate shortcuts, etc. But the icon for sublime cannot be display in any launcher even if I provide a full pathname to the option. The solution is to install a 2nd instance of sublime from a deb package. When I install sublime-text-2 from a .deb package, it installs under /usr/bin && /usr/lib, the installed .desktop file is stored under /usr/share/applications, and the relevant line reads: icon=sublime_text. Where's the linkage I'm missing? Somehow Ubuntu knows how to exact the icon from sublime_text in the latter, but not in the former (again, even with a full path provided).

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  • outlook signature problem

    - by user20989
    i have created signature for my windows mail signature html file has following code. <table border="0" cellspacing="0" cellpadding="0"> <tr> <td>Regards</td> </tr> <tr> <td><img src="http://images.google.com/intl/en_ALL/images/logos/images_logo_lg.gif" align="Signature Picture" /></td> </tr> </table> its working fine once i send message, but when if i foreword send item again i got signature but image not display. once i check the source of email i found following change in signature image automatically like <IMG height=128 alt="Compnay Logo" src="mhtml:{4B829C94-37FC-44B9-A60C-CC4BB1E0AE9B}mid://00000152/!http://images.google.com/intl/en_ALL/images/logos/images_logo_lg.gif" width=206 border=0> how to fix it. or any other way to put image in signature (not image is also hosted on web server) Thanks

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  • Why does Ubuntu gets stuck on the loading screen?

    - by mohit
    I've been experiencing many problem lately since I fresh installed Ubuntu 12.04 LTS on my SONY VAIO VPCEH with Windows 7 previously installed. Sometimes when I try to boot Ubuntu, it gets stuck at loading screen. There seems to be some problem with driver (as far I can judge). Following is the log generated, when I press Esc during the boot (before the problem occurs): ... * Stopping System V initialization compatibility [ok] * Starting System V runlevel compatibility [ok] * Starting crash report submission daemon [ok] * Starting automatic crash report generation [ok] ... ... * Starting LightDM Display Manager [ok] Nothing works after that, no Esc, etc, except restart. Also I've observed the following: Inactivity of Hard-drive (Led doesn't glows). Flashing, or blinking, of Caps-lock and Scroll-lock On restart, Ubuntu seem to load successfully. However, the loading screen has somewhat basic graphics. This problem started after I installed Additional drivers: NVIDIA accelerated graphics driver Also, most of the times Ubuntu loads without any problem. However, it is annoying to restart everytime it fails. So my question is: Why this happens and what is the solution?

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  • Restrict Tile Map to its boundaries

    - by Farooq Arshed
    I have loaded a tmx file in cocos2dx and now I am trying to implement panning. I have successfully implemented the panning first part where the map moves. Now I want to restrict the map so it does not display the map beyond its boundary where it shows black screen. I am confused as to how to implement it. Below is my code any help would be appreciated. bool HelloWorld::init() { if ( !CCLayer::init() ) { return false; } const char* tmx= "isometric_grass_and_water.tmx"; _tileMap = new CCTMXTiledMap(); _tileMap->initWithTMXFile(tmx); this->addChild(_tileMap); this->setTouchEnabled(true); return true; } void HelloWorld::ccTouchesBegan(CCSet *touches, CCEvent *event){ CCSetIterator it; for (it=touches->begin(); it!=touches->end(); ++it){ CCTouch* touch = (CCTouch*)it.operator*(); CCLog("touches id: %d", touch->getID()); oldLoc = touch->getLocationInView(); oldLoc = CCDirector::sharedDirector()->convertToGL(oldLoc); } } void HelloWorld::ccTouchesMoved(CCSet *touches, CCEvent *event) { if (touches->count() == 1) { CCTouch* touch = (CCTouch*)( touches->anyObject() ); this->moveScreen(touch); } else if (touches->count() == 2) { this->scaleScreen(touches); } } void HelloWorld::moveScreen(CCTouch* touch) { CCPoint currentLoc = touch->getLocationInView(); currentLoc = CCDirector::sharedDirector()->convertToGL(currentLoc); CCPoint moveTo = ccpSub(oldLoc, currentLoc); moveTo = ccpMult(moveTo, -1); oldLoc = currentLoc; this->setPosition(ccpAdd(this->getPosition(), ccp(moveTo.x, moveTo.y))); }

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  • Re-enabling audio on an iMac

    - by Warren Seine
    Hello guys, I know Super User is not a 'tech support' forum, so I will try to make it short: my computer's sound does not work anymore. I have asked for support on the Apple board but I feel a bit on my own. To summarize, the Sound Panel of my iMac does not display any outgoing channel (headphones or internal speakers). It does not work on Windows either. Contrary to what it may seem, I have the feeling that it is not a hardware issue (and that GarageBand is somehow interfering). If you have an idea to solve the problem, please share. Making it work again is a lost cause without sending it back to Apple, so the question I'm asking is: What is the best workaround (cheap Firewire sound card?) for getting my sound back? Thanks.

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  • Java game object pool management

    - by Kenneth Bray
    Currently I am using arrays to handle all of my game objects in the game I am making, and I know how terrible this is for performance. My question is what is the best way to handle game objects and not hurt performance? Here is how I am creating an array and then looping through it to update the objects in the array: public static ArrayList<VboCube> game_objects = new ArrayList<VboCube>(); /* add objects to the game */ while (!Display.isCloseRequested() && !Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) { for (int i = 0; i < game_objects.size(); i++){ // draw the object game_objects.get(i).Draw(); game_objects.get(i).Update(); //world.updatePhysics(); } } I am not looking for someone to write me code for asset or object management, just point me into a better direction to get better performance. I appreciate the help you guys have provided me in the past, and I dont think I would be as far along with my project without the support on stack exchange!

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  • How to completely remove a wireless network setup from vista?

    - by 3d1l
    To remove a wireless connection setup I basically go to (network and sharing center) then select (manage wireless network) and then from the list of wireless networks I right click on the one that I want to remove and select (remove network) from the drop down menu. Problem is that when I go to define the wireless network again the system said that the network connection already exist so it seems that even when the wireless network definition is not longer display in the connections list, Vista keeps the configuration somewhere. So How can I be sure that a particular wireless network has been completely removed?

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  • Webmaster Tools, www and no-www, duplicate content and subdomains

    - by Jay
    I have not come to any conclusive answers on the following after many hours of research on many websites to the specific issue that I am trying to figure out. My company has two websites a main one at www.example.com and one at subdomain.example.com which is a subdomain of the first and is our self hosted blog. The way Google sees these with the www or no-www (called naked for now on) is that each of these actually are different when the www or naked version is used/not used in the front of the domain. I completely understand this. It is also advised that both should be set up in the Google Webmaster Tools, which I have done. Correct me if I am wrong on that in regard to having both set up. Now the way it appears is that we can set a preferred domain up in Webmaster Tools only at the root domain level. The subdomain can not have this and actually says the following "Restricted to root level domains only". So it appears that the domain should follow what the root domain says which on our preferred one says to display the www.example.com. and not the naked version. That is one issue I have in that one displays one way and the other displays another. Is it that we have the wrong redirects in place for the subdomain? Another question is does this have any affect on SEO in regards to duplicate content on the web in how we have set this up?

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  • ecryptfs - decrypt and mount at boot with USB key

    - by Josh McGee
    I have a system running Ubuntu Server as a testbed for some services that I want to get familiar with. I decided to let the installation procedure set up encryption. I knew all along that I would have to decrypt it with the passphrase in order to get the system booted, but I assumed it wouldn't matter since it will only boot once or twice a month. However, my brother has informed me that he is a victim of power outages at the residence where this server is located. This means we have to explain to his girlfriend how to turn on the computer, attach a keyboard, connect a monitor (she just can't understand that she can type to the computer without a display, so whatever) and input the passphrase for us, while we are at work. I have arrived at the conclusion that I should just put together a USB key that can be plugged in before powering on the computer, to avoid all the trouble. Is this possible with ecryptfs? Is there a tutorial or simple list of instructions available so that I can knock this out and focus back on the stuff I care about? EDIT: I am aware that this is possible with LUKS and dm-crypt, but unfortunately the magical encryption that Ubuntu hands you during the installation is only ecryptfs so my question is specific to that.

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  • Discover MAC address

    - by Kami
    I've to setup a bunch of server ! I need to discover their mac address with the following situation : MacBookPro >----------< Server I'm directly connected (not behind a router/switch) to the server. I've no clues about the ip address the server is using as default setup. I can't use a display connected to the server displaying its newtwork card config. How can I discover the MAC address of the server network card ? I'm looking for a command line tool. If something exists in MacPort it's also ok !

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  • Ethernet switch not working

    - by Froskoy
    I've just tried using two different ethernet switches on my network to replace an 8-port Netgear gigabit ethernet switch, which works fine, but doesn't have enough ports for what I need. Computers are connected to a TP-Link TD-8840T router via a switch. They use DHCP for IP address assignment. One switch is a TigerSwitch 6924M, which I'd expect to be difficult to set up, since it is second hand and has an advanced configuration menu, which I can't access without a serial port. However, the second switch that I tried is a new TP-Link TL-SF024, which doesn't appear to have any configuration options, so that can't be the problem. When I say "not working," I mean that although they display that they are connected to a network, they cannot access the internet. For example commands like "ping -c10 google.co.uk" come up with 100% packet loss. What could be causing the problem and how do I fix it?

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  • How to revert back to older xorg?

    - by wouter205
    Since the last update of ubuntu 12.04, the system won't boot into gui anymore. It states that it was unable to load the graphics drivers and gives me 4 options, these are: run in low graphics mode for 1 session reconfigure graphics troubleshoot the error exit to console login whichever option I choose, it doesn't solve anything. For instance, when i choose to reconfigure graphics and then switch to vesa drivers, the screen goes back to the option list. So i configured xorg.conf to vesa myself, and i see in the update history that ubuntu updated xserver-xorg-core and xserver-common whereas i blocked these updates in synaptic since i'm aware that updating these files caused troubles with my particular video card (radeon hd6800). So my solution is probably to revert these files to the older (working) versions. How can I do this please (in particular xserver-xorg-core since i think this is the main cause of my problem). thanks! output of ls /etc/X11 -app-defaults xorg.conf Xreset -cursors xorg.conf-backup-120529144709 Xreset.d -default-display-manager xorg.conf.fglrx-0 -Xresources -fonts xorg.conf.fglrx-1 Xsession -rgb.txt xorg.conf.fglrx-2 Xsession.d -X xorg.conf.original-0 -Xsession.options -xinit xorg.conf.original-1 -Xwrapper.config -xkb xorg.conf.vesa Output of sudo aptitude show xserver-xorg-core | grep Versie (read: Version in Flemish) Versie: 2:1.11.4-0ubuntu10.2

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  • Subterranean IL: Generics and array covariance

    - by Simon Cooper
    Arrays in .NET are curious beasts. They are the only built-in collection types in the CLR, and SZ-arrays (single dimension, zero-indexed) have their own commands and IL syntax. One of their stranger properties is they have a kind of built-in covariance long before generic variance was added in .NET 4. However, this causes a subtle but important problem with generics. First of all, we need to briefly recap on array covariance. SZ-array covariance To demonstrate, I'll tweak the classes I introduced in my previous posts: public class IncrementableClass { public int Value; public virtual void Increment(int incrementBy) { Value += incrementBy; } } public class IncrementableClassx2 : IncrementableClass { public override void Increment(int incrementBy) { base.Increment(incrementBy); base.Increment(incrementBy); } } In the CLR, SZ-arrays of reference types are implicitly convertible to arrays of the element's supertypes, all the way up to object (note that this does not apply to value types). That is, an instance of IncrementableClassx2[] can be used wherever a IncrementableClass[] or object[] is required. When an SZ-array could be used in this fashion, a run-time type check is performed when you try to insert an object into the array to make sure you're not trying to insert an instance of IncrementableClass into an IncrementableClassx2[]. This check means that the following code will compile fine but will fail at run-time: IncrementableClass[] array = new IncrementableClassx2[1]; array[0] = new IncrementableClass(); // throws ArrayTypeMismatchException These checks are enforced by the various stelem* and ldelem* il instructions in such a way as to ensure you can't insert a IncrementableClass into a IncrementableClassx2[]. For the rest of this post, however, I'm going to concentrate on the ldelema instruction. ldelema This instruction pops the array index (int32) and array reference (O) off the stack, and pushes a pointer (&) to the corresponding array element. However, unlike the ldelem instruction, the instruction's type argument must match the run-time array type exactly. This is because, once you've got a managed pointer, you can use that pointer to both load and store values in that array element using the ldind* and stind* (load/store indirect) instructions. As the same pointer can be used for both input and output to the array, the type argument to ldelema must be invariant. At the time, this was a perfectly reasonable restriction, and maintained array type-safety within managed code. However, along came generics, and with it the constrained callvirt instruction. So, what happens when we combine array covariance and constrained callvirt? .method public static void CallIncrementArrayValue() { // IncrementableClassx2[] arr = new IncrementableClassx2[1] ldc.i4.1 newarr IncrementableClassx2 // arr[0] = new IncrementableClassx2(); dup newobj instance void IncrementableClassx2::.ctor() ldc.i4.0 stelem.ref // IncrementArrayValue<IncrementableClass>(arr, 0) // here, we're treating an IncrementableClassx2[] as IncrementableClass[] dup ldc.i4.0 call void IncrementArrayValue<class IncrementableClass>(!!0[],int32) // ... ret } .method public static void IncrementArrayValue<(IncrementableClass) T>( !!T[] arr, int32 index) { // arr[index].Increment(1) ldarg.0 ldarg.1 ldelema !!T ldc.i4.1 constrained. !!T callvirt instance void IIncrementable::Increment(int32) ret } And the result: Unhandled Exception: System.ArrayTypeMismatchException: Attempted to access an element as a type incompatible with the array. at IncrementArrayValue[T](T[] arr, Int32 index) at CallIncrementArrayValue() Hmm. We're instantiating the generic method as IncrementArrayValue<IncrementableClass>, but passing in an IncrementableClassx2[], hence the ldelema instruction is failing as it's expecting an IncrementableClass[]. On features and feature conflicts What we've got here is a conflict between existing behaviour (ldelema ensuring type safety on covariant arrays) and new behaviour (managed pointers to object references used for every constrained callvirt on generic type instances). And, although this is an edge case, there is no general workaround. The generic method could be hidden behind several layers of assemblies, wrappers and interfaces that make it a requirement to use array covariance when calling the generic method. Furthermore, this will only fail at runtime, whereas compile-time safety is what generics were designed for! The solution is the readonly. prefix instruction. This modifies the ldelema instruction to ignore the exact type check for arrays of reference types, and so it lets us take the address of array elements using a covariant type to the actual run-time type of the array: .method public static void IncrementArrayValue<(IncrementableClass) T>( !!T[] arr, int32 index) { // arr[index].Increment(1) ldarg.0 ldarg.1 readonly. ldelema !!T ldc.i4.1 constrained. !!T callvirt instance void IIncrementable::Increment(int32) ret } But what about type safety? In return for ignoring the type check, the resulting controlled mutability pointer can only be used in the following situations: As the object parameter to ldfld, ldflda, stfld, call and constrained callvirt instructions As the pointer parameter to ldobj or ldind* As the source parameter to cpobj In other words, the only operations allowed are those that read from the pointer; stind* and similar that alter the pointer itself are banned. This ensures that the array element we're pointing to won't be changed to anything untoward, and so type safety within the array is maintained. This is a typical example of the maxim that whenever you add a feature to a program, you have to consider how that feature interacts with every single one of the existing features. Although an edge case, the readonly. prefix instruction ensures that generics and array covariance work together and that compile-time type safety is maintained. Tune in next time for a look at the .ctor generic type constraint, and what it means.

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  • Linux Journal Best Virtualization Solution Readers' Choice 2012

    - by Chris Kawalek
    I'm proud to report that in the latest issue of Linux Journal their readers named Oracle VM VirtualBox the "Best Virtualization Solution" for 2012. We're excited to receive this honor and want to thank Linux Journal and their readers for recognizing us!  This is the latest award won by Oracle VM VirtualBox, following a 2011 Bossie Award (best open source software) from InfoWorld, a 2012 Readers' Choice award from Virtualization Review, and several others. These awards help us know that people are using Oracle VM VirtualBox in their day to day work and that it's really useful to them. We truly appreciate their (your!) support. If you already use Oracle VM VirtualBox, you will know all this. But, just in case you haven't tried it yet, here's a few reasons you should download it: Free for personal use and open source. You can download it in minutes and start running multiple operating systems on your Windows PC, Mac, Oracle Solaris system, or Linux PC. It's fast and powerful, and easy to install and use. It has in-depth support for client technologies like USB, virtual CD/DVD, virtual display adapters with various flavors of 2D and 3D acceleration, and much more. If you've ever found yourself in a situation where you were concerned about installing a piece of software because it might be too buggy, or wanted to have a dedicated system to test things on, or wanted to run Windows on a Mac or Oracle Solaris on a PC (or hundreds of other combinations!), or didn't want to install your company's VPN software directly on your home system, then you should definitely give Oracle VM VirtualBox a try. Once you install it, you'll find a myriad of other uses, too. Thanks again to the readers of Linux Journal for selecting Oracle VM VirtualBox as the Best Virtualization Solution for 2012. If you'd like to read the whole article, you can purchase this month's issue over at the Linux Journal website. -Chris

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  • ArchBeat Link-o-Rama Top 20 for May 27-June 2, 2012

    - by Bob Rhubart
    The Top 20 most-clicked links as shared via my social networks for the week of May 27 - June 2, 2012. 10 Great WebCenter Sites Resources (FatWire) | John Brunswick Cloning a WebCenter Portal Managed Server | Maiko Rocha Identity Propagation across Web and Web Service 11g | Prakash Yamuna Oracle DB with OEM in Amazon Cloud | Frank Munz IT professionals: Very much the time to change our approach | Andy Mulholland Sorting and Filtering By Model-Based LOV Display Value | Steven Davelaar Enable Content editing of Iterative components |Stefan Krantz Complexity of Social Computing - Is it a Consideration for EAs? | Pat Shepherd Updating metadata in a WebCenter Content Presenter template | Yannick Ongena Eclipse DemoCamp - June 2012 - Redwood Shores, CA Roll Your Own Solaris Blogroll |  Larry Wake BI Architecture Master Class for Partners - Oracle Architecture Unplugged Sample External Login.jsp page for Oracle Access Manager 11g | Brian Eidelman 2012 Oracle Fusion Middleware Innovation Awards - Win a FREE Pass to Oracle OpenWorld 2012 in SF Application integration: reorganise, recycle, repurpose | Andrew Clarke RIDC Accelerator for Portal | Stefan Krantz Bay Area Coherence Special Interest Group (BACSIG) Meeting June 7 The Application Architecture Domain | Michael Glas Designing and Developing Cross-Cutting Features | Stephen Rylander Configuring the iPlanet as web tier for Oracle WebCenter Content (UCM) | Adao Junior Thought for the Day "Liberate yourself from that idea that people are watching you." — Russell Brand Source: Good Reads

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  • Where Facebook Stands Heading Into 2013

    - by Mike Stiles
    In our last blog, we looked at how Twitter is positioned heading into 2013. Now it’s time to take a similar look at Facebook. 2012, for a time at least, seemed to be the era of Facebook-bashing. Between a far-from-smooth IPO, subsequent stock price declines, and anxiety over privacy, the top social network became a target for comedians, politicians, business journalists, and of course those who were prone to Facebook-bash even in the best of times. But amidst the “this is the end of Facebook” headlines, the company kept experimenting, kept testing, kept innovating, and pressing forward, committed as always to the user experience, while concurrently addressing monetization with greater urgency. Facebook enters 2013 with over 1 billion users around the world. Usage grew 41% in Brazil, Russia, Japan, South Korea and India in 2012. In the Middle East and North Africa, an average 21 new signups happen per minute. Engagement and time spent on the site would impress the harshest of critics. Facebook, while not bulletproof, has become such an integrated daily force in users’ lives, it’s getting hard to imagine any future mass rejection. You want to see a company recognizing weaknesses and shoring them up. Mobile was a weakness in 2012 as Facebook was one of many caught by surprise at the speed of user migration to mobile. But new mobile interfaces, better mobile ads, speed upgrades, standalone Messenger and Pages mobile apps, and the big dollar acquisition of Instagram, were a few indicators Facebook won’t play catch-up any more than it has to. As a user, the cool thing about Facebook is, it knows you. The uncool thing about Facebook is, it knows you. The company’s walking a delicate line between the public’s competing desires for customized experiences and privacy. While the company’s working to make privacy options clearer and easier, Facebook’s Paul Adams says data aggregation can move from acting on what a user is engaging with at the moment to a more holistic view of what they’re likely to want at any given time. To help learn about you, there’s Open Graph. Embedded through diverse partnerships, the idea is to surface what you’re doing and what you care about, and help you discover things via your friends’ activities. Facebook’s Director of Engineering, Mike Vernal, says building mobile social apps connected to Facebook in such ways is the next wave of big innovation. Expect to see that fostered in 2013. The Facebook site experience is always evolving. Some users like that about Facebook, others can’t wait to complain about it…on Facebook. The Facebook focal point, the News Feed, is not sacred and is seeing plenty of experimentation with the insertion of modules. From upcoming concerts, events, suggested Pages you might like, to aggregated “most shared” content from social reader apps, plenty could start popping up between those pictures of what your friends had for lunch.  As for which friends’ lunches you see, that’s a function of the mythic EdgeRank…which is also tinkered with. When Facebook changed it in September, Page admins saw reach go down and the high anxiety set in quickly. Engagement, however, held steady. The adjustment was about relevancy over reach. (And oh yeah, reach was something that could be charged for). Facebook wants users to see what they’re most likely to like, based on past usage and interactions. Adding to the “cream must rise to the top” philosophy, they’re now even trying out ordering post comments based on the engagement the comments get. Boy, it’s getting competitive out there for a social engager. Facebook has to make $$$. To do that, they must offer attractive vehicles to marketers. There are a myriad of ad units. But a key Facebook marketing concept is the Sponsored Story. It’s key because it encourages content that’s good, relevant, and performs well organically. If it is, marketing dollars can amplify it and extend its reach. Brands can expect the rollout of a search product and an ad network. That’s a big deal. It takes, as Open Graph does, the power of Facebook’s user data and carries it beyond the Facebook environment into the digital world at large. No one could target like Facebook can, and some analysts think it could double their roughly $5 billion revenue stream. As every potential revenue nook and cranny is explored, there are the users themselves. In addition to Gifts, Facebook thinks users might pay a few bucks to promote their own posts so more of their friends will see them. There’s also word classifieds could be purchased in News Feeds, though they won’t be called classifieds. And that’s where Facebook stands; a wildly popular destination, a part of our culture, with ever increasing functionalities, the biggest of big data, revenue strategies that appeal to marketers without souring the user experience, new challenges as a now public company, ongoing privacy concerns, and innovations that carry Facebook far beyond its own borders. Anyone care to write a “this is the end of Facebook” headline? @mikestilesPhoto via stock.schng

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  • Functional Adaptation

    - by Charles Courchaine
    In real life and OO programming we’re often faced with using adapters, DVI to VGA, 1/4” to 1/8” audio connections, 110V to 220V, wrapping an incompatible interface with a new one, and so on.  Where the adapter pattern is generally considered for interfaces and classes a similar technique can be applied to method signatures.  To be fair, this adaptation is generally used to reduce the number of parameters but I’m sure there are other clever possibilities to be had.  As Jan questioned in the last post, how can we use a common method to execute an action if the action has a differing number of parameters, going back to the greeting example it was suggested having an AddName method that takes a first and last name as parameters.  This is exactly what we’ll address in this post. Let’s set the stage with some review and some code changes.  First, our method that handles the setup/tear-down infrastructure for our WCF service: 1: private static TResult ExecuteGreetingFunc<TResult>(Func<IGreeting, TResult> theGreetingFunc) 2: { 3: IGreeting aGreetingService = null; 4: try 5: { 6: aGreetingService = GetGreetingChannel(); 7: return theGreetingFunc(aGreetingService); 8: } 9: finally 10: { 11: CloseWCFChannel((IChannel)aGreetingService); 12: } 13: } Our original AddName method: 1: private static string AddName(string theName) 2: { 3: return ExecuteGreetingFunc<string>(theGreetingService => theGreetingService.AddName(theName)); 4: } Our new AddName method: 1: private static int AddName(string firstName, string lastName) 2: { 3: return ExecuteGreetingFunc<int>(theGreetingService => theGreetingService.AddName(firstName, lastName)); 4: } Let’s change the AddName method, just a little bit more for this example and have it take the greeting service as a parameter. 1: private static int AddName(IGreeting greetingService, string firstName, string lastName) 2: { 3: return greetingService.AddName(firstName, lastName); 4: } The new signature of AddName using the Func delegate is now Func<IGreeting, string, string, int>, which can’t be used with ExecuteGreetingFunc as is because it expects Func<IGreeting, TResult>.  Somehow we have to eliminate the two string parameters before we can use this with our existing method.  This is where we need to adapt AddName to match what ExecuteGreetingFunc expects, and we’ll do so in the following progression. 1: Func<IGreeting, string, string, int> -> Func<IGreeting, string, int> 2: Func<IGreeting, string, int> -> Func<IGreeting, int>   For the first step, we’ll create a method using the lambda syntax that will “eliminate” the last name parameter: 1: string lastNameToAdd = "Smith"; 2: //Func<IGreeting, string, string, int> -> Func<IGreeting, string, int> 3: Func<IGreeting, string, int> addName = (greetingService, firstName) => AddName(greetingService, firstName, lastNameToAdd); The new addName method gets us one step close to the signature we need.  Let’s say we’re going to call this in a loop to add several names, we’ll take the final step from Func<IGreeting, string, int> -> Func<IGreeting, int> in line as a lambda passed to ExecuteGreetingFunc like so: 1: List<string> firstNames = new List<string>() { "Bob", "John" }; 2: int aID; 3: foreach (string firstName in firstNames) 4: { 5: //Func<IGreeting, string, int> -> Func<IGreeting, int> 6: aID = ExecuteGreetingFunc<int>(greetingService => addName(greetingService, firstName)); 7: Console.WriteLine(GetGreeting(aID)); 8: } If for some reason you needed to break out the lambda on line 6 you could replace it with 1: aID = ExecuteGreetingFunc<int>(ApplyAddName(addName, firstName)); and use this method: 1: private static Func<IGreeting, int> ApplyAddName(Func<IGreeting, string, int> addName, string lastName) 2: { 3: return greetingService => addName(greetingService, lastName); 4: } Splitting out a lambda into its own method is useful both in this style of coding as well as LINQ queries to improve the debugging experience.  It is not strictly necessary to break apart the steps & functions as was shown above; the lambda in line 6 (of the foreach example) could include both the last name and first name instead of being composed of two functions.  The process demonstrated above is one of partially applying functions, this could have also been done with Currying (also see Dustin Campbell’s excellent post on Currying for the canonical curried add example).  Matthew Podwysocki also has some good posts explaining both Currying and partial application and a follow up post that further clarifies the difference between Currying and partial application.  In either technique the ultimate goal is to reduce the number of parameters passed to a function.  Currying makes it a single parameter passed at each step, where partial application allows one to use multiple parameters at a time as we’ve done here.  This technique isn’t for everyone or every problem, but can be extremely handy when you need to adapt a call to something you don’t control.

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