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  • Grow Your Business with Security

    - by Darin Pendergraft
    Author: Kevin Moulton Kevin Moulton has been in the security space for more than 25 years, and with Oracle for 7 years. He manages the East EnterpriseSecurity Sales Consulting Team. He is also a Distinguished Toastmaster. Follow Kevin on Twitter at twitter.com/kevin_moulton, where he sometimes tweets about security, but might also tweet about running, beer, food, baseball, football, good books, or whatever else grabs his attention. Kevin will be a regular contributor to this blog so stay tuned for more posts from him. It happened again! There I was, reading something interesting online, and realizing that a friend might find it interesting too. I clicked on the little email link, thinking that I could easily forward this to my friend, but no! Instead, a new screen popped up where I was asked to create an account. I was expected to create a User ID and password, not to mention providing some personally identifiable information, just for the privilege of helping that website spread their word. Of course, I didn’t want to have to remember a new account and password, I didn’t want to provide the requisite information, and I didn’t want to waste my time. I gave up, closed the web page, and moved on to something else. I was left with a bad taste in my mouth, and my friend might never find her way to this interesting website. If you were this content provider, would this be the outcome you were looking for? A few days later, I had a similar experience, but this one went a little differently. I was surfing the web, when I happened upon some little chotcke that I just had to have. I added it to my cart. When I went to buy the item, I was again brought to a page to create account. Groan! But wait! On this page, I also had the option to sign in with my OpenID account, my Facebook account, my Yahoo account, or my Google Account. I have all of those! No new account to create, no new password to remember, and no personally identifiable information to be given to someone else (I’ve already given it all to those other guys, after all). In this case, the vendor was easy to deal with, and I happily completed the transaction. That pleasant experience will bring me back again. This is where security can grow your business. It’s a differentiator. You’ve got to have a presence on the web, and that presence has to take into account all the smart phones everyone’s carrying, and the tablets that took over cyber Monday this year. If you are a company that a customer can deal with securely, and do so easily, then you are a company customers will come back to again and again. I recently had a need to open a new bank account. Every bank has a web presence now, but they are certainly not all the same. I wanted one that I could deal with easily using my laptop, but I also wanted 2-factor authentication in case I had to login from a shared machine, and I wanted an app for my iPad. I found a bank with all three, and that’s who I am doing business with. Let’s say, for example, that I’m in a regular Texas Hold-em game on Friday nights, so I move a couple of hundred bucks from checking to savings on Friday afternoons. I move a similar amount each week and I do it from the same machine. The bank trusts me, and they trust my machine. Most importantly, they trust my behavior. This is adaptive authentication. There should be no reason for my bank to make this transaction difficult for me. Now let's say that I login from a Starbucks in Uzbekistan, and I transfer $2,500. What should my bank do now? Should they stop the transaction? Should they call my home number? (My former bank did exactly this once when I was taking money out of an ATM on a business trip, when I had provided my cell phone number as my primary contact. When I asked them why they called my home number rather than my cell, they told me that their “policy” is to call the home number. If I'm on the road, what exactly is the use of trying to reach me at home to verify my transaction?) But, back to Uzbekistan… Should my bank assume that I am happily at home in New Jersey, and someone is trying to hack into my account? Perhaps they think they are protecting me, but I wouldn’t be very happy if I happened to be traveling on business in Central Asia. What if my bank were to automatically analyze my behavior and calculate a risk score? Clearly, this scenario would be outside of my typical behavior, so my risk score would necessitate something more than a simple login and password. Perhaps, in this case, a one-time password to my cell phone would prove that this is not just some hacker half way around the world. But, what if you're not a bank? Do you need this level of security? If you want to be a business that is easy to deal with while also protecting your customers, then of course you do. You want your customers to trust you, but you also want them to enjoy doing business with you. Make it easy for them to do business with you, and they’ll come back, and perhaps even Tweet about it, or Like you, and then their friends will follow. How can Oracle help? Oracle has the technology and expertise to help you to grown your business with security. Oracle Adaptive Access Manager will help you to prevent fraud while making it easier for your customers to do business with you by providing the risk analysis I discussed above, step-up authentication, and much more. Oracle Mobile and Social Access Service will help you to secure mobile access to applications by expanding on your existing back-end identity management infrastructure, and allowing your customers to transact business with you using the social media accounts they already know. You also have device fingerprinting and metrics to help you to grow your business securely. Security is not just a cost anymore. It’s a way to set your business apart. With Oracle’s help, you can be the business that everyone’s tweeting about. Image courtesy of Flickr user shareski

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  • Can't start HTTPD

    - by Kevin
    I'm trying to start httpd, but it only gives me '[FAILED]'. Now, I installed exim, but that didn't worked, so I uninstalled it. But then the web server didn't worked any more! I tried to /etc/init.d/httpd start, but that gives '[FAILED]' without a reason. What can I do to get it started? httpd -e debug gives: [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module auth_basic_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module auth_digest_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authn_file_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authn_alias_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authn_anon_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authn_dbm_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authn_default_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authz_host_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authz_user_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authz_owner_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authz_groupfile_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authz_dbm_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authz_default_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module ldap_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module authnz_ldap_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module include_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module log_config_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module logio_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module env_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module ext_filter_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module mime_magic_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module expires_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module deflate_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module headers_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module usertrack_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module setenvif_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module mime_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module dav_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module status_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module autoindex_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module info_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module dav_fs_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module vhost_alias_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module negotiation_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module dir_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module actions_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module speling_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module userdir_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module alias_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module rewrite_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module proxy_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module proxy_balancer_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module proxy_ftp_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module proxy_http_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module proxy_connect_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module cache_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module suexec_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module disk_cache_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module file_cache_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module mem_cache_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module cgi_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module version_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module ssl_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module fcgid_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module perl_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module php5_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module proxy_ajp_module [Wed Nov 23 11:47:25 2011] [debug] mod_so.c(246): loaded module python_module Regards, Kevin

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  • PHP install sqlite3 extension

    - by Kevin
    We are using PHP 5.3.6 here, but we used the --without-sqlite3 command when compiling PHP. (It stands in the 'Configure Command' column). But, it is very risky to recompile PHP on that server; there are many visitors. How can we install/use sqlite3? Regards, Kevin [EDIT] yum repolist gives: Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.nl.leaseweb.net * extras: mirror.nl.leaseweb.net * updates: mirror.nl.leaseweb.net repo id repo name status base CentOS-5 - Base 3,566 extras CentOS-5 - Extras 237 updates CentOS-5 - Updates 376 repolist: 4,179 rpm -qa | grep php gives: php-pdo-5.3.6-1.w5 php-mysql-5.3.6-1.w5 psa-php5-configurator-1.5.3-cos5.build95101022.10 php-mbstring-5.3.6-1.w5 php-imap-5.3.6-1.w5 php-cli-5.3.6-1.w5 php-gd-5.3.6-1.w5 php-5.3.6-1.w5 php-common-5.3.6-1.w5 php-xml-5.3.6-1.w5 php -i | grep sqlite gives: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/sqlite3.so' - /usr/lib64/php/modules/sqlite3.so: cannot open shared object file: No such file or directory in Unknown on line 0 Configure Command => './configure' '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/usr/com' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--cache-file=../config.cache' '--with-libdir=lib64' '--with-config-file-path=/etc' '--with-config-file-scan-dir=/etc/php.d' '--disable-debug' '--with-pic' '--disable-rpath' '--without-pear' '--with-bz2' '--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '--enable-gd-native-ttf' '--without-gdbm' '--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-dir=/usr' '--with-openssl' '--with-pcre-regex=/usr' '--with-zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' '--enable-sysvsem' '--enable-sysvshm' '--enable-sysvmsg' '--with-kerberos' '--enable-ucd-snmp-hack' '--enable-shmop' '--enable-calendar' '--without-mime-magic' '--without-sqlite' '--without-sqlite3' '--with-libxml-dir=/usr' '--enable-xml' '--with-system-tzdata' '--enable-force-cgi-redirect' '--enable-pcntl' '--with-imap=shared' '--with-imap-ssl' '--enable-mbstring=shared' '--enable-mbregex' '--with-gd=shared' '--enable-bcmath=shared' '--enable-dba=shared' '--with-db4=/usr' '--with-xmlrpc=shared' '--with-ldap=shared' '--with-ldap-sasl' '--with-mysql=shared,/usr' '--with-mysqli=shared,/usr/bin/mysql_config' '--enable-dom=shared' '--with-pgsql=shared' '--enable-wddx=shared' '--with-snmp=shared,/usr' '--enable-soap=shared' '--with-xsl=shared,/usr' '--enable-xmlreader=shared' '--enable-xmlwriter=shared' '--with-curl=shared,/usr' '--enable-fastcgi' '--enable-pdo=shared' '--with-pdo-odbc=shared,unixODBC,/usr' '--with-pdo-mysql=shared,/usr' '--with-pdo-pgsql=shared,/usr' '--with-pdo-sqlite=shared,/usr' '--with-pdo-dblib=shared,/usr' '--enable-json=shared' '--enable-zip=shared' '--with-readline' '--with-pspell=shared' '--enable-phar=shared' '--with-mcrypt=shared,/usr' '--with-tidy=shared,/usr' '--with-mssql=shared,/usr' '--enable-sysvmsg=shared' '--enable-sysvshm=shared' '--enable-sysvsem=shared' '--enable-posix=shared' '--with-unixODBC=shared,/usr' '--enable-fileinfo=shared' '--enable-intl=shared' '--with-icu-dir=/usr' '--with-recode=shared,/usr' /etc/php.d/pdo_sqlite.ini, /etc/php.d/sqlite3.ini, PHP Warning: Unknown: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead in Unknown on line 0 PDO drivers => mysql, sqlite pdo_sqlite PWD => /root/sqlite _SERVER["PWD"] => /root/sqlite _ENV["PWD"] => /root/sqlite

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  • How clean is deleting a computer object?

    - by Kevin
    Though quite skilled at software development, I'm a novice when it comes to Active Directory. I've noticed that AD seems to have a lot of stuff buried in the directory and schema which does not appear superficially when using simplified tools such as Active Directory Users and Computers. It kind of feels like the Windows registry, where COM classes have all kinds of intertwined references, many of which are purely by GUID, such that it's not enough to just search for anything referencing "GadgetXyz" by name in order to cleanly remove GadgetXyz. This occasionally leads to the uneasy feeling that I may have useless garbage building up in there which I have no idea how to weed out. For instance, I made the mistake a while back of trying to rename a DC, figuring I could just do it in the usual manner from Control Panel. I found references to the old name buried all over the place which made it impossible to reuse that name without considerable manual cleanup. Even long after I got it all working, I've stumbled upon the old name hidden away in LDAP. (There were no other DCs left in the picture at that time so I don't think it was a tombstone issue.) More specifically, I'm worried about the case of just outright deleting a computer from AD. I understand the cleanest way to do it is to log into the computer itself and tell it to leave the domain. (As an aside, doing this in Windows 8 seems to only disable the computer object and not delete it outright!) My concern is cases where this is not possible, for instance because it was on an already-deleted VM image. I can simply go into Active Directory Users and Computers, find the computer object, click it, and press Delete, and it seems to go away. My question is, is it totally, totally gone, or could this leave hanging references in any Active Directory nook or cranny I won't know to look in? (Excluding of course the expected tombstone records which expire after a set time.) If so, is there any good way to clean up the mess? Thank you for any insight! Kevin ps., It was over a year ago so I don't remember the exact details, but here's the gist of the DC renaming issue. I started with a single 2008 DC named ABC in a physical machine and wanted to end up instead with a DC of the same name running in a vSphere VM. Not wanting to mess with imaging the physical machine, my plan instead was: Rename ABC to XYZ. Fresh install 2008 on a VM, name it ABC, and join it to the domain. (I may have done the latter in the same step as promoting to DC; I don't recall.) dcpromo the new ABC as a 2nd DC, including GC. Make sure the new ABC replicated correctly from XYZ and then transfer the FSMO roles from XYZ to it. Once everything was confirmed to work with the new ABC alone, demote XYZ, remove the AD role, and remove it from the domain. Eventually I managed to do this but it was a much bumpier ride than expected. In particular, I got errors trying to join the new ABC to the domain. These included "The pre-windows 2000 name is already in use" and "No mapping between account names and security IDs was done." I eventually found that the computer object for XYZ had attributes that still referred to it as ABC. Among these were servicePrincipalName, msDS-AdditionalDnsHostName, and msDS-AdditionalSamAccountName. The latter I could not edit via Attribute Editor and instead had to run this against XYZ: NETDOM computername <simple-name> /add:<FQDN> There were some other hitches I don't remember exactly.

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  • Saving complex aggregates using Repository Pattern

    - by Kevin Lawrence
    We have a complex aggregate (sensitive names obfuscated for confidentiality reasons). The root, R, is composed of collections of Ms, As, Cs, Ss. Ms have collections of other low-level details. etc etc R really is an aggregate (no fair suggesting we split it!) We use lazy loading to retrieve the details. No problem there. But we are struggling a little with how to save such a complex aggregate. From the caller's point of view: r = repository.find(id); r.Ps.add(factory.createP()); r.Cs[5].updateX(123); r.Ms.removeAt(5); repository.save(r); Our competing solutions are: Dirty flags Each entity in the aggregate in the aggregate has a dirty flag. The save() method in the repository walks the tree looking for dirty objects and saves them. Deletes and adds are a little trickier - especially with lazy-loading - but doable. Event listener accumulates changes. Repository subscribes a listener to changes and accumulates events. When save is called, the repository grabs all the change events and writes them to the DB. Give up on repository pattern. Implement overloaded save methods to save the parts of the aggregate separately. The original example would become: r = repository.find(id); r.Ps.add(factory.createP()); r.Cs[5].updateX(123); r.Ms.removeAt(5); repository.save(r.Ps); repository.save(r.Cs); repository.save(r.Ms); (or worse) Advice please! What should we do?

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  • Good Books About Scaling Up Databases/Servers/etc.?

    - by Mehrdad
    I've applied for an internship at a startup company that expects its user base to grow by a large factor in a small amount of time, and so part of their project is to scale everything up so that they're ready: handling more/larger requests efficiently, handling server failures, load balancing, getting more JavaScript to run faster on the client computers, etc. Part of my job will also be figuring out what to do, so it's not obvious what my exact task will be at the moment. I was told that I should start reading up a little more about this so that I would have a little bit of an idea of what to do. What are some good books for me to read on this topic? I have a little bit of experience with the usage of MySQL (and also a little experience with web development), but in no way do I claim any knowledge on the internal workings of databases or distributed systems, so I might need readings more on the introductory side.

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  • How to Force Aero Peek to Stay Up

    - by user26900
    Let's say I have a video running in an application. If I hover my mouse over the taskbar, it shows a little popup windows that diplays the video (aero peek). Sometimes I'm running a maximized window and I want to have this little screen always popped up. (Kind've like when your using the TV Guide menu, you still see a little clip of the video)

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  • Time Machine for Windows

    - by Kevin L.
    A simple Google search for "Time Machine for Windows" results in a flurry of different little apps. But instead of relying on forum anecdotes and advertisements, I call on the much wiser Super User beta community for some depth on this one. Having Time Machine running on Leopard is like a warm, fuzzy blanket of comfort that I never got with RAID, rsync, or SyncToy on Windows. I'm not asking the community what the "best" backup software for Windows is, but instead: Is there any true Time Machine clone for Windows, one that includes as many of the following as possible: Completely transparent, "set-it-and-forget-it" backup Incremental backups (changes only) for every hour for a day, every day for a month, and every week until the backup disk is full Ability to rebuild from this backup disk in case of main drive meltdown (the backup doesn't have to be bootable; neither are Time Machine disks) Extremely easy to use UI (target user == wife). Bonus points for a beautiful UI

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  • Apply Group Policy to Remote Desktop Services users but not when they log on to their local system

    - by Kevin Murray
    Running Windows Server 2008 Service Pack 2 with Remote Desktop Services role. I want to hide the servers drives using a GPO, but not the users local drives when they are logged on to their local system. Using a GPO, I went to "User Configuration - Policies - Administrative Template - Windows Components - Windows Explorer" and enabled "Hide these specified drives in My Computer" and "Prevent access to drives from My Computer" and in both used "Restrict all drives". Then under "Security Filtering" for the GPO, I restricted it to the system running Remote Desktop Services and the specific users who will be using RDS. I then applied the GPO to our domain and it worked a little too well. Not only was I successful in getting the GPO to work for RDS users, but it also affected those same users at their local systems as well. I've tried everything I can think of, but can't figure out how to apply this just to the RDS but not at their local system. What am I missing?

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  • O'reilly certification in PHP worth it?

    - by editzombie
    I asked this question over on stack overflow but I didn't realise it wasn't really the place for not so technical questions. I've seen quite a few related threads on this forum so I thought I'd try and get some feedback here: This is my first time asking a question on this forum, though I´ve read it a lot. I apologise if this is repeating a thread. I´m interested in getting into web development. I am a video editor by trade but living in Spain the way things are at the moment its very difficult to find work. I have some very basic knowledge of HTML and CSS and a little bit of flash and have designed a few little personal websites myself. I also worked for a online marketing production company where I worked a little on blog design in Blogger amongst other social media. So thats my background, but I´m trying to expand my skills and get into web development as a career or in general part of my skill base, I was thinking particularly about PHP/MySQL. I have worked a little on some of the Lynda.com tutorials and have invested in a book (Sams Teach Yourself PHP, MySQL and Apache). I´m still finding it very difficult to progress. I know I should really try some practice projects (any reccomendations would be welcome). But I was also thinking about doing one of the O´Reilly certification courses and was wondering whether it would be worthwhile for a noob like me. I hear that the courses are associated with an American University which I guess gives it more clout. Any other thoughts you guys have about how to make progress in learning web development would be fantasic. Thanks in advance.

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  • How should I plan the inheritance structure for my game?

    - by Eric Thoma
    I am trying to write a platform shooter in C++ with a really good class structure for robustness. The game itself is secondary; it is the learning process of writing it that is primary. I am implementing an inheritance tree for all of the objects in my game, but I find myself unsure on some decisions. One specific issue that it bugging me is this: I have an Actor that is simply defined as anything in the game world. Under Actor is Character. Both of these classes are abstract. Under Character is the Philosopher, who is the main character that the user commands. Also under Character is NPC, which uses an AI module with stock routines for friendly, enemy and (maybe) neutral alignments. So under NPC I want to have three subclasses: FriendlyNPC, EnemyNPC and NeutralNPC. These classes are not abstract, and will often be subclassed in order to make different types of NPC's, like Engineer, Scientist and the most evil Programmer. Still, if I want to implement a generic NPC named Kevin, it would nice to be able to put him in without making a new class for him. I could just instantiate a FriendlyNPC and pass some values for the AI machine and for the dialogue; that would be ideal. But what if Kevin is the one benevolent Programmer in the whole world? Now we must make a class for him (but what should it be called?). Now we have a character that should inherit from Programmer (as Kevin has all the same abilities but just uses the friendly AI functions) but also should inherit from FriendlyNPC. Programmer and FriendlyNPC branched away from each other on the inheritance tree, so inheriting from both of them would have conflicts, because some of the same functions have been implemented in different ways on the two of them. 1) Is there a better way to order these classes to avoid these conflicts? Having three subclasses; Friendly, Enemy and Neutral; from each type of NPC; Engineer, Scientist, and Programmer; would amount to a huge number of classes. I would share specific implementation details, but I am writing the game slowly, piece by piece, and so I haven't implemented past Character yet. 2) Is there a place where I can learn these programming paradigms? I am already trying to take advantage of some good design patterns, like MVC architecture and Mediator objects. The whole point of this project is to write something in good style. It is difficult to tell what should become a subclass and what should become a state (i.e. Friendly boolean v. Friendly class). Having many states slows down code with if statements and makes classes long and unwieldy. On the other hand, having a class for everything isn't practical. 3) Are there good rules of thumb or resources to learn more about this? 4) Finally, where does templating come in to this? How should I coordinate templates into my class structure? I have never actually taken advantage of templating honestly, but I hear that it increases modularity, which means good code.

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  • How to use Sprockets Rails plugin on Heroku?

    - by Kevin
    Hi, I just deployed my Rails app to Heroku, but the Javascripts that were using Sprockets plugin don't work. I understood that, because my Heroku app is read-only, Sprockets won't work. I've found this sprockets_on_heroku plugin that should do the work, but I don't really get how to use it : I added config.gem sprockets in config/environment.rb I added sprockets in my .gems file I pushed these on Heroku and Sprockets was successfully installed I locally ran script/plugin install git://github.com/jeffrydegrande/sprockets_on_heroku.git and the plugin was successfully installed Nothing changed on Heroku, so I tried to install the plugin on Heroku with heroku plugins:install git://github.com/jeffrydegrande/sprockets_on_heroku.git, which returned sprockets_on_heroku installedbut then, a heroku restartor a heroku pluginscommand would return this: ~/.heroku/plugins/sprockets_on_heroku/init.rb:1: uninitialized constant ActionController (NameError) from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:25:in `load' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:25:in `load!' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:22:in `each' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:22:in `load!' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/command.rb:14:in `run' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/heroku:14 from /opt/local/bin/heroku:19:in `load' from /opt/local/bin/heroku:19 What should I do? Kevin

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  • .NET COM Interop on Windows 7 64Bit gives me a headache

    - by Kevin Stumpf
    Hey guys, .NET COM interop so far always has been working quite nicely. Since I upgraded to Windows 7 I don't get my .NET COM objects to work anymore. My COM object is as easy as: namespace Crap { [ComVisible(true)] [Guid("2134685b-6e22-49ef-a046-74e187ed0d21")] [ClassInterface(ClassInterfaceType.None)] public class MyClass : IMyClass { public MyClass() {} public void Test() { MessageBox.Show("Finally got in here."); } } } namespace Crap { [Guid("1234685b-6e22-49ef-a046-74e187ed0d21")] public interface IMyClass { } } assembly is marked ComVisible as well. I register the assembly using regasm /codebase /tlb "path" registers successfully (admin mode). I tried regasm 32 and 64bit. Both time I get the error "ActiveX component cant create object Crap.MyClass" using this vbscript: dim objReg Set objReg = CreateObject("Crap.MyClass") MsgBox typename(objReg) fuslogvw doesn't give me any hints either. That COM object works perfectly on my Vista 32 Bit machine. I don't understand why I haven't been able to google a solution for that problem.. am I really the only person that ever got into that problem? Looking at OleView I see my object is registered successfully. I am able to create other COM objects as well.. it only does not work with my own ones. Thank you, Kevin

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  • Intern working for Indian NGO - Help with PHP 4, advising staff

    - by Kevin Burke
    Hello, For the past three months I've been working for an Indian NGO (http://sevamandir.org), doing some volunteer work in the field but also trying to improve their website, which needs a ton of work. Recently I've been trying to fix the "subscribe to newsletter" button, which is broken. I used filter_var to filter the email input, but when I tried to test this out I got an error. Then I learned that the web host is still using php version 4.3.2 and register_globals is turned on. I've mentioned that they should upgrade their web host before (they are paying around $50 per year for Rediff Web Hosting, complete with 100MB storage and 1 MySQL database). That would add a lot of complexity for the IT staff of 3, who would have to update everyone's email information (I assume? this is a 250-person organization), and have me find a new web host and teach them about it. The staff isn't that sophisticated about web usage - the head guy still uses IE6, and the website's laid out in tables (they use Dreamweaver WYSIWYG to lay out pages). So I've got two options - use regular expressions to filter the email, which I'm not that skilled at doing (and would be more vulnerable to exploitation after I leave), turn off register globals and then try to teach the staff what I'm doing, or try to get them to upgrade their versions of PHP and MySQL and/or change web host. I'd appreciate some advice. Thanks for your help, Kevin

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  • BackgroundWorker From ASP.Net Application

    - by Kevin
    We have an ASP.Net application that provides administrators to work with and perform operations on large sets of records. For example, we have a "Polish Data" task that an administrator can perform to clean up data for a record (e.g. reformat phone numbers, social security numbers, etc.) When performed on a small number of records, the task completes relatively quickly. However, when a user performs the task on a larger set of records, the task may take several minutes or longer to complete. So, we want to implement these kinds of tasks using some kind of asynchronous pattern. For example, we want to be able to launch the task, and then use AJAX polling to provide a progress bar and status information. I have been looking into using the BackgroundWorker class, but I have read some things online that make me pause. I would love to get some additional advice on this. For example, I understand that the BackgroundWorker will actually use the thread pool from the current application. In my case, the application is an ASP.Net web site. I have read that this can be a problem because when the application recycles, the background workers will be terminated. Some of the jobs I mentioned above may take 3 minutes, but others may take a few hours. Also, we may have several hundred administrators all performing similar operations during the day. Will the ASP.Net application thread pool be able to handle all of these background jobs efficiently while still performing it's normal request processing? So, I am trying to determine if using the BackgroundWorker class and approach is right for our needs. Should I be looking at an alternative approach? Thanks and sorry for such a long post! Kevin

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  • Pass a data.frame column name to a function

    - by Kevin Middleton
    I'm trying to write a function to accept a data.frame (x) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function. The two minimal examples fun1 and fun2 below produce the desired result, being able to perform operations on x$column, using max() as an example. However, both rely on the seemingly (at least to me) inelegant (1) call to substitute() and possibly eval() and (2) the need to pass the column name as a character vector. fun1 <- function(x, column){ do.call("max", list(substitute(x[a], list(a = column)))) } fun2 <- function(x, column){ max(eval((substitute(x[a], list(a = column))))) } df <- data.frame(A = 1:20, B = rnorm(10)) fun1(df, "B") fun2(df, "B") I would like to be able to call the function as fun(df, B), for example. Other options I have considered but have not tried: Pass column as an integer of the column number. I think this would avoid substitute(). Ideally, the function could accept either. with(x, get(column)), but, even if it works, I think this would still require substitute Make use of formula() and match.call(), neither of which I have much experience with. Subquestion: Is do.call() preferred over eval()? Thanks, Kevin

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  • Sanitizing user input that will later be e-mailed - what should I be worried about?

    - by Kevin Burke
    I'm interning for an NGO in India (Seva Mandir, http://sevamandir.org) and trying to fix their broken "subscribe to newsletter" box. Because the staff isn't very sophisticated and our web host isn't great, I decided to send the relevant data to the publications person via mail() instead of storing it in a MySQL database. I know that it's best to treat user input as malicious, and I've searched the SO forums for posts relevant to escaping user data for sending in a mail message. I know the data should be escaped; what should I be worried about and what's the best way to sanitize the input before emailing it? Form flow: 1. User enters email on homepage and clicks Submit 2. User enters name, address, more information on second page (bad usability, I know, but my boss asked me to) and clicks "Submit" 3. Collect the data via $_POST and email it to the publications editor (and possibly send a confirmation to the subscriber). I am going to sanitize the email in step 2 and the other data in step 3. I appreciate your help, Kevin

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  • How to :update after :success with link_to_remote Rails method?

    - by Kevin
    Hi, I'm trying to get two things done after a user clicks on a link: Delete a div Add another element at the bottom of the page I played with Rails link_to_remote and what I get with the code below is that the element is added before the div is deleted: <%= link_to_remote "&#x2713;", :url => { :controller => :movies, :action => :mark_as_seen, :movie => movie, :render => 'movie' }, :success => "Effect.Fade('movie_#{movie.id}_wrapper', { duration: 0.4 })", :update => "movies", :position => "bottom", :failure => "alert('Ooops! An error occurred.')" %> I tried to put :update and :position in a :complete callback, but nothing happened. And when I put both of them in the :success callback (after Effect.Fade), all I get is a parsing error. Any idea? Thanks, Kevin

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  • How ZFS handles online replacement in a RAID-Z (theoretical)

    - by Kevin
    This is a somewhat theoretical question about ZFS and RAID-Z. I'll use a three disk single-parity array as an example for clarity, but the problem can be extended to any number of disks and any parity. Suppose we have disks A, B, and C in the pool, and that it is clean. Suppose now that we physically add disk D with the intention of replacing disk C, and that disk C is still functioning correctly and is only being replaced out of preventive maintenance. Some admins might just yank C and install D, which is a little more organized as devices need not change IDs - however this does leave the array degraded temporarily and so for this example suppose we install D without offlining or removing C. Solaris docs indicate that we can replace a disk without first offlining it, using a command such as: zpool replace pool C D This should cause a resilvering onto D. Let us say that resilvering proceeds "downwards" along a "cursor." (I don't know the actual terminology used in the internal implementation.) Suppose now that midways through the resilvering, disk A fails. In theory, this should be recoverable, as above the cursor B and D contain sufficient parity and below the cursor B and C contain sufficient parity. However, whether or not this is actually recoverable depnds upon internal design decisions in ZFS which I am not aware of (and which the manual doesn't say in certain terms). If ZFS continues to send writes to C below the cursor, then we are fine. If, however, ZFS internally treats C as though it were gone, resilvering D only from parity between A and B and only writing A and B below the cursor, then we're toast. Some experimenting could answer this question but I was hoping maybe someone on here already knows which way ZFS handles this situation. Thank you in advance for any insight!

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  • SSAS processing error: Client unable to establish connection; 08001; Encryption not supported on the client.; 08001

    - by Kevin Shyr
    After getting the cube to successfully deploy and process on Friday, I was baffled on Monday that the newly added dimension caused the cube processing to break.  I then followed the first instinct, discarded all my changes to reverted back to the version on Friday, and had no luck.  The error message (attached below) did not help as I was looking for some kind of SQL service error.  After examining the windows server log and the SQL server log, I just couldn't see anything wrong with it.After swearing for some time, and with the help of going off and working on something else for a while.  I came back to the solution and looked at the data source.  Even though I know I have never changed the provider (the default setup gave me SQL native client), I decided to change it and give OLE DB a try.This simple change allows my cube to process successfully again.  While I don't understand why the same settings that worked last week doesn't work this week, I don't have all the information to say with certainty that nothing has changed in the environment (firewall changes, server updates, etc.).SSAS processing error:<Batch >  <Parallel>    <Process xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ddl2="http://schemas.microsoft.com/analysisservices/2003/engine/2" xmlns:ddl2_2="http://schemas.microsoft.com/analysisservices/2003/engine/2/2" xmlns:ddl100_100="http://schemas.microsoft.com/analysisservices/2008/engine/100/100" xmlns:ddl200="http://schemas.microsoft.com/analysisservices/2010/engine/200" xmlns:ddl200_200="http://schemas.microsoft.com/analysisservices/2010/engine/200/200">      <Object>        <DatabaseID>DWH Sales Facts</DatabaseID>        <CubeID>DWH Sales Facts</CubeID>      </Object>      <Type>ProcessFull</Type>      <WriteBackTableCreation>UseExisting</WriteBackTableCreation>    </Process>  </Parallel></Batch>                Processing Dimension 'Date' completed.                                Errors and Warnings from Response                OLE DB error: OLE DB or ODBC error: A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online.; 08001; Client unable to establish connection; 08001; Encryption not supported on the client.; 08001.                Errors in the high-level relational engine. A connection could not be made to the data source with the DataSourceID of 'DWH Sales Facts', Name of 'DWH Sales Facts'.                Errors in the OLAP storage engine: An error occurred while the dimension, with the ID of 'Currency', Name of 'Currency' was being processed.                Errors in the OLAP storage engine: An error occurred while the 'Currency Dim ID' attribute of the 'Currency' dimension from the 'DWH Sales Facts' database was being processed.                Internal error: The operation terminated unsuccessfully.                Server: The operation has been cancelled.

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  • How to run Repository Creation Utility (RCU) on 64-bit Linux

    - by Kevin Smith
    I was setting up WebCenter Content (WCC) on a new virtual box running 64-bit Linux and ran into a problem when I tried to run the Repository Creation Utility (RCU). I saw this error when trying to start RCU .../rcuHome/jdk/jre/bin/java: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory I think I remember running into this before and reading something about RCU only being supported on 32-bit Linux. I decided to try and see if I could get it to run on 64-bit Linux. I saw it was using it's own copy of java (.../rcuHome/jdk/jre/bin/java), so I decided to try and get it to use the 64-bit JRockit I had already installed. I edited the rcu script in rcuHome/bin and replaced JRE_DIR=$ORACLE_HOME/jdk/jre with JRE_DIR=/apps/java/jrockit-jdk1.6.0_29-R28.2.2-4.1.0 Sure enough that fixed it. I was able to run RCU and create the WCC schema.

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  • System can't sleep, can't shutdown (might be networking related)

    - by Kevin Q
    I speculate it's networking related since I could only shut down my system if I do /etc/init.d/networking stop first. If I tried to put the system to sleep, it disconnect the network then reconnect it automatically, never goes to sleep. I uninstalled the network manager, then /etc/init.d/networking stop will not help shutdown the system anymore. When I boot into the OS, there were some warning about Unknown job:S20acpid,S20network-interface, S20network-manager . I got some advices to do update-rc.d -f to remove all those script, which I am not certain if it's right thing to do. The messages are gone but the problem remains. When I tried to restart, I used to get this message It doesn't seem to be the modem manager since I later removed it. Once upon a time, the fronze shutting down/restarting can be restarted when I presses Ctrl+Alt+Delete, and it says something like networking is stopped externally. If I log in single user mode, and shutdown or reboot, it show this screen I also tried GRUB_CMDLINE_LINUX_DEFAULT = "acpi=force" This is a Ubuntu 12.04 running on Thinkpad T520, not new installation, no such problems occurred before.

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  • Some New .NET Toys (Repost)

    - by Kevin Grossnicklaus
    Last week I was fortunate enough to spend time in Redmond on Microsoft’s campus for the 2011 Microsoft MVP Summit. It was great to hang out with a number of old friends and get the opportunity to talk tech with the various product teams up at Microsoft. The weather wasn’t exactly sunny but Microsoft always does a great job with the Summit and everyone had a blast (heck, I even got to run the bases at SafeCo field) While much of what we saw is covered under NDA, there a ton of great things in the pipeline from Microsoft and many things that are already available (or just became so) that I wasn’t necessarily aware of. The purpose of this post is to share some of the info I learned on resources and tools available to .NET developers today. Please let me know if you have any questions (or if you know of something else cool which might benefit others). Enjoy! Visual Studio 2010 SP1 Microsoft has issued the RTM release of Visual Studio 2010 SP1. You can download the full SP1 on MSDN as of today (March 10th to the general public) and take advantage of such things as: Silverlight 4 is included in the box (as opposed to a separate install) Silverlight 4 Profiling WCF RIA Services SP1 Intellitrace for 64-bit and SharePoint ASP.NET now easily supports IIS Express and SQL CE Want a description of all that’s new beyond the above biased list (which arguably only contains items I think are important)? Check out this KB article. Portable Library Tools CTP Without much fanfare Microsoft has released a CTP of a new add-in to Visual Studio 2010 which simplifies code sharing between projects targeting different runtimes (i.e. Silverlight, WPF, Win7 Phone, XBox). With this Add-In installed you can add a new project of type “Portable Library” and specify which platforms you wish to target. Once that is done, any code added to this library will be limited to use only features which are common to all selected frameworks. Other projects can now reference this portable library and be provided assemblies custom built to their environment. This greatly simplifies the current process of sharing linked files between platforms like WPF and Silverlight. You can find out more about this CTP and how it works on this great blog post. Visual Studio Async CTP Microsoft has also released a CTP of a set of language and framework enhancements to provide a much more powerful asynchronous programming model. Due to the focus on async programming in all types of platforms (and it being the ONLY option in Silverlight and Win7 phone) a move towards a simpler and more understandable model is always a good thing. This CTP (called Visual Studio Async CTP) can be downloaded here. You can read more about this CTP on this blog post. MSDN Code Samples Gallery Microsoft has also launched new code samples gallery on their MSDN site: http://code.msdn.microsoft.com/. This site allows you to easily search for small samples of code related to a particular technology or platform. If a sample of code you are looking for is not found, you can request one via the site and other developers can see your request and provide a sample to the site to suit your needs. You can also peruse requested samples and, if you find a scenario where you can provide value, upload your own sample for the benefit of others. Samples are packaged into the VS .vsix format and include any necessary references/dependencies. By using .vsix as the deployment mechanism, as samples are installed from the site they are kept in your Visual Studio 2010 Samples Gallery and kept for your future reference. If you get a chance, check out the site and see how it is done. Although a somewhat simple concept, I was very impressed with their implementation and the way they went about trying to suit a need. I’ll definitely be looking there in the future as need something or want to share something. MSDN Search Capabilities Another item I learned recently and was not aware of (that might seem trivial to some) is the power of the MSDN site’s search capabilities. Between the Code Samples Gallery described above and the search enhancements on MSDN, Microsoft is definitely investing in their platform to help provide developers of all skill levels the tools and resources they need to be successful. What do I mean by the MSDN search capability and why should you care? If you go to the MSDN home page (http://msdn.microsoft.com) and use the “Search MSDN with Big” box at the very top of the page you will see some very interesting results. First, the search actually doesn’t just search the MSDN library it searches: MSDN Library All Microsoft Blogs CodePlex StackOverflow Downloads MSDN Magazine Support Knowledgebase (I’m not sure it even ends there but the above are all I know of) Beyond just searching all the above locations, the results are formatted very nicely to give some contextual information based on where the result came from. For example, if a keyword search returned results from CodePlex, each row in the search results screen would include a large amount of information specific to CodePlex such as: Looking at the above results immediately tells you everything from the page views to the CodePlex ratings. All in all, knowing that this much information is indexed and available from a single search location will lead me to utilize this as one of my initial searches for development information.

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