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• Switching to a VPS

  - by Damian

  Well, I know absolutely nothing about the subject, so I really need help. I currently have a website running on google app-engine (Java) and I can't get it to what I want because of app engine's limitations (no full text search mainly). The traffic is low, never reached 15% of the free quota (around 1500 daily pageviews). I also have 3 sites in drupal hosted in a shared hosting service, and this is giving me problems, because the server speed is awful. The sites are VERY low trafic, but load times are bad, and I might need to add more sites for some clients, so this will only get worse. So, i'm planning to move all that to VPS. The question is, can I have 2 http servers running in the same VPS? because I will need Apache-php-drupal server and a java server (tomcat?). I have really no idea on this, so any tip will be very helpful to me. Thanks!

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• "a valid provisioning file for this executable was not found" in XCode

  - by dbonneville

  I'm trying to submit my second app to the App Store. I've followed all the instructions to the best of my knowledge, but I keep getting this error when I try to build and run: "a valid provisioning file for this executable was not found" I'm letting XCode auto select the profile automatically. The one I'd like to select is greyed out. But the dropdown selection in the Build tab of the Target window says "profile doesn't match application identifier" The other thing I don't get about this is that the selection dropdown shows "com.mycompany.myapp" and then "ABCDEDFG.com.mycompany.myapp" (both of those made up) so that I see they don't match. I have the unique identifier profile installed in the Organizer and in plist file. I'm totally confused. I have followed the instructions in my book a few times and just can't get it.

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• using core data with web services

  - by Jayshree

  Hi. i am a noob in xcode. I am developing an iphone app where i need to send and receive data from a web service. And i need to store them temporarily in my app. i dont want to use sqlite. so i was wondering if i should use core data for this purpose. I read some articles but i still dont have a clear picture of how to do it, coz i have used core data only with sqlite. I want to do the following things : Will receive table data from a web service. Have to perform certain calculations on those fields. Will send the data back in xml format to the server. How do i convert the xml data into int, date or any other data type? and how do i store it in managed data objects? Can anyone please help me with this??? thnx for your time.

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• tabbarcontroller as a subview

  - by Boaz

  Hi I have a main view screen with navcontroller in my app with two UIbuttons. Now i want that when I press one button a subview will be pushed. this I know how to do. The problem is that I want this subview to be with tabbarcontroller. I know how to implement tabbar on the main views (within the app delegate), but I have really hard time to do this as a subview.. How should I implement this? Thanks.

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• Test/Dummy SMTP server for Windows

  - by geoaxis

  I would like to install a Test/Dummy SMTP server on a Windows 2008 server (virtual box). I just want to test my web application on the machine it self so I don't need the mails to go out on the internet, but just to be written to disk (so that I can verify that the mail function was indeed called and the correct data was handed over to SMTP) Can you recommend some tool. I guess starting your own SMTP server in python is an option. I am looking for a simple (ready to use) solution, targeted for tests systems. I will need to integrate it to automated tests (Selenium) at a later stage. Thanks

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• Sendmail relay out of Amazon EC2?

  - by Stephen Belanger

  I have a site running on CentOS 5.4 through Amazon EC2. Unfortunately, Amazon has had nothing but trouble with their entire IP range getting black listed from spam tracking services regularly. I need a mail server, so I setup an smtp server elsewhere that I want to send to, but I can't just send directly to it through PHP because the direct smtp request is way too slow. What I want to do is relay through sendmail, but I've never used sendmail before, so I have no idea how to configure it. All I want is for all emails sent from localhost to be relayed to one specific external server, but I don't know how to do that. I tried to find a tutorial online, but couldn't find anything that was particularly clear as to how I go about doing that. Can anyone help me out?

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• caching static files for ruby on rails application using nginx

  - by splintercell

  I have been trying for some time to serve & cache static files for my rails app using nginx. the rails app server runs mongrel_cluster and is deployed on a different host than that of nginx. following many of the available discussions I tried the following server { listen 80; server_name www.myappserver.com; ssl on; root /var/apps/myapp/current/public; location ~ ^/(images|javascripts|stylesheets)/ { root /var/apps/myapp/current; expires 10y; } location / { proxy_pass http://myapp_upstream; } } But nginx fails to find the images and to load the css and js files. Can anyone help me out here? My aim is to configure nginx in such a way that it caches the static files till expiry. Please suggest me some way to achieve this or am I missing any point here?

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• starting subactivity for the second time causes java.lang.OutOfMemoryError

  - by Zacherl

  Hi there, I am developing a simple app which does a little bit of image-processing. It's divided in two activities; the main one with some display elements and the second one which is used to capture images off the phone's camera. To discribe my problem: I start the app, capture an image (by starting a new Intent with the subactivity) and all data is displayed correctly. If I capture another image after this, I run in an java.lang.OutOfMemoryError - bitmap size exceeds VM budget I dont store the captured bitmap, in the second activity I just extract some data from it and pass it to the main-activity; finishing (finish()) the sub-activity afterwards. I really dont know what I can do about it. Thanks in advance! greetings, Zacherl PS: It is my first approach to android, so I apologize for any stupid beginner error I did; if someone needs any further information, I would be happy to provide it.

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• Servlet request getparameter's performance

  - by Bob

  Hi, I noticed that my app is very slow sometimes, so I've done some tests. It's a very simple web app. One servlet gets some parameters than stores them. Everything's fine except one thing. It takes too long to get a parameter for the first time. It doesn't matter which parameter I try to get, but for the first time it is very slow. The strange thing is this doesn't happen always. Sometimes getting a parameter for the first time is not slow. My code looks like this request.getParameter("paramName"); request.getParameter("paramName2"); request.getParameter("paramName3"); Getting "paramName" is slow. Getting the others is very fast. By slow I mean : 200-800 millisec By very fast I mean: ~0 millisec (in the code snippet, I didn't write the performance test, but I'm using System.currentTimeMillis())

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• Ways to call Blocks within Magento: createBlock vs Layout xml file

  - by N. B.

  Context: I'm trying to include Adminhtml blocks in the frontend of the site to replace some of the user account blocks. The first thing I'm trying to do is simply display the block on the correct page. I can replace the entire page by setting the Body of the response inside the controller, but I'm having a hard time including the block in the layout xml file and then calling it within the template. Why would I be able to create an adminhtml/sales_order_grid from Mage_Sales_OrderController using createBlock: $this->getResponse()->setBody($this->getLayout()->createBlock('adminhtml/sales_order_grid')->toHtml()); But not from a frontend layout, using a declaration <block type="adminhtml/sales_order_grid" name="orders_widget"/> within app/design/frontend/default/default/layout/sales.xml The latter produces an error without a stack trace: Fatal error: Call to a member function toHtml() on a non-object in app/code/core/Mage/Core/Model/Layout.php on line 526 Thanks for any guidance!

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• Testing perceived performance

  - by Josh Kelley

  I recently got a shiny new development workstation. The only disadvantage of this is that the desktop apps I'm developing now run very, very fast, and so I fear that parts of the code that would be annoyingly slow on end users' machines will go unnoticed during my testing. Is there a good way to slow down an application for testing? I've tried searching around, but all of the results I've been able to find seem pretty fiddly to set up (e.g., manually setting up a high-priority CPU-bound task on the same CPU core as the target app, or running a background process that rapidly interrupts and resumes the target app), and I don't know if the end result is actually a good representation of running on a slower computer (with its slower CPU, slower RAM, slower disk I/O...). I don't think that this is a job for a profiler; I'm interested in the user's perception of end-to-end performance rather than in where the time goes for particular operations.

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• Xcode: Using a custom framework

  - by Robert

  The error I'm getting: in /Users/robert/Documents/funWithFrameworks/build/Debug-iphonesimulator/funWithFrameworks.framework/funWithFrameworks, can't link with a main executable Cliff notes: trying to include framework doesn't want to link More detail: I'm developing for a mobile device... hint, hint using Xcode and I'm trying to make my own custom framework which I can include from another application. So far, I've done the following: Create a new project; an iPhone OS window based app. Go to target info- under packaging, change the wrapper extension from app to framework Go to Action-new build phase - copy headers. Change roles of headers to 'public' From my application, I add the framework to the frameworks group.

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• Wicket Drag and drop functionality for adding an image

  - by Marcel

  I'm making a wicket app that can manage some options for a cashdesk app. One of the options is to change the image of a selected Product. The user(manager) can choose from the already present images in the database (SQL) when this option is selected, or add a new image if the desired image is not present. Don't mention the test names and awesome images (it's still in test-fase) I prefer to see the adding of an image achieved by Drag and Drop html5 demo [dnd-upload] (From the desktop into the browser) I'm currently using Wicket-6.2.0 and wicket-dnd 0.5.0 and i can't seem to get this working! All examples I can find are from wicket 2.x or lower. It is possible to use drag and drop in Wicket-6.2, but how do I achieve this? There seems to be some DraggableBehavior in wicket? Any help is welcome! [UPDATE] Upgraded to wicket-dnd 0.6

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• Explanation of various domain name records?

  - by Kumar

  At the time of hosting, normally we just change name servers in the domain control panel. It's fine if both mail and web servers are the same. When they're different, we need to change the DNS records. When I try to point my blog to my domain name, I came to know about the various types of DNS records - A Records, AAA Records, MX Records, CNAME Records, NS Records, TXT Records, SRV Records, SOA Records, etc. I searched on Google, but would like to know more about these deeply. I found this link on the Internet - http://www.directnic.com/help/faq/?question_id=103 and got some idea about the different DNS records. But I have some more questions. How do the domain name records work? Is there any difference between NS record and other records in the way they work? Where should the NS record point to when using A record, CNAME record and MX record?

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• How do I mock a custom field that is deleted so that south migrations run?

  - by muhuk

  I have removed an app that contained a couple of custom fields from my project. Now when I try to run my migrations I get ImportError, naturally. These fields were very basic customizations like below: from django.db.models.fields import IntegerField class SomeField(IntegerField): def get_internal_type(self): return "SomeField" def db_type(self, connectio=None): return 'integer' def clean(self, value): # some custom cleanup pass So, none of them contain any database level customizations. When I removed this code, I've created migrations so the subsequent migration all ran fine. But when I try to run them on a pre-deletion database I realized my mistake. I can re-create a bare-bones app and make these imports work, but Ideally I would like to know if South has a mechanism to resolve these issues? Or is there any best practises? It would be cool if I could solve these issues just by modifying my migrations and not touching the codebase. (Django 1.3, South 0.7.3)

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• Java and gstreamer-java initialisation error

  - by Mark

  I am building a small app which will play streaming audio from the internet in java (mainly internet radio stations). I have decided to use the gstreamer-java library for the sound, which uses JNA. I would like to include a check in the code, to see whether the gstreamer library has been initialised. When I have left the "Gst.init()" code out (to mimic when the library has not been initialised correctly), the application throws out the following messages: (process:21888): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function (process:21888): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed The app calls the gstreamer-java library. The error messages appear but the thread continues to run, hogging the CPU. Is there any way to catch the error or to add a check to prevent it from happening? An alternative would be to put the "Gst.init()" in the main class, but I am not sure if this would always guarantee the gstreamer library is initialised.

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• error with gtkmm 3 in ubuntu 12.04

  - by Grohiik

  i install libgtkmm-3.0-dev in ubuntu 12.04 and i try to learn and write program with c++ and gtkmm 3 i go to this link "http://developer.gnome.org/gtkmm-tutorial/unstable/sec-basics-simple-example.html.en" and try to compile simple example program : #include <gtkmm.h> int main(int argc, char *argv[]) { Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.examples.base"); Gtk::ApplicationWindow window; return app->run(window); } my file name is "basic.cc" and i open terminal and type following command to compile: g++ basic.cc -o basic `pkg-config gtkmm-3.0 --cflags --libs` compile completed without any error but when i try to run program with type ./basic in terminal i get following error : ~$ ./simple ./simple: symbol lookup error: ./simple: undefined symbol:_ZN3Gtk11Application6createERiRPPcRKN4Glib7ustringEN3Gio16ApplicationFlagsE ~$ how can i solve this problem ? i can cimpile any gtkmm 2.4 code with this command : " g++ basic.cc -o basic pkg-config gtkmm-3.0 --cflags --libs " and this command : " g++ basic.cc -o basic pkg-config gtkmm-2.4 --cflags --libs " thanks

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• Git Specify Remote Source Durring Push

  - by ThinkBohemian

  I have a local git repository a "central" repo at github. I'm working on a part of a project, while a friend is working on a related piece that is its entirely seperate repo, is it possible for me to simply link directly to my friends repo? For example, the app is called widgets. I have all my code in widgets/app/mycode and my friend is writing code that goes into widgets/plugins/awesome/hiscode. I want to be able to always have http://github.com/mycode/widgets/plugins/hiscode to be a direct link or clone to http://github.com/hiscode/awesome ? It could be possible i'm missing something basic in my question or knowledge of git, if so please ask, and i'll be happy to try to fill in the blanks.

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• Android Market Publishing Issues

  - by Steve

  I have an app which I have just updated to froyo to take advantage of the move to SD card feature. I am now trying to upload the update to the market but I keep getting the following error: "The file is invalid: W/ResourceType( 7193): Bad string block: last string is not 0- terminated ERROR getting 'android:label' attribute: attribute is not a string value". I changed the value in the manifest from "android:label="@string/app_name" " to "android:label="test" " and uploaded it, then it started complaining about the icon, saying that it wasn't a string. Anyone have any ideas? The application part of my manifest is shown below and I'm properly confused. The app compiles into an APK, it even installs and runs fine on my N1 (installing from SD card) it just won't upload to the market. Any help would be greatly appreciated, I have absolutely no idea what's wrong, seems like I've tried everything I can think of including re-installing eclipse. Cheers Steve

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• postfix uses hostname instead of myhostname.

  - by sunny.oxide

  Hi there, I am trying to set up an outgoing mail server for sending emails which is to relay to our ISP. In /etc/postfix/main.cf I have myhostname to ourcompany.example.com and myorigin and mydomain to $myhostname. ourcompany.example.com is resolvable. But looking at the logs in /var/log/maillog it appears that postfix does use the myhostname for the send address, but uses whatever from getmyhostname(), which is set to an internal DNS name since this is an internal server and we only send email out, but not handling incoming email. Any ideas?

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• Call Babel .Net Obfuscator from C# Code

  - by aron

  Hello, I have a C# WinForms app that I use to create software patches for my app. In noticed that Babel .Net includes Babel.Build.dll and Babel.Code.dll Is there a way, in my C# code, I can call Babel .Net something like: ExecuteCommand(C:\Program Files\Babel\babel.exe "C:\Patch\v6\Demo\Bin\Lib.dll" --rules "C:\Patch\babelRules.xml", 600) Here's a common script to execute a CMD prompt in C#. However if I just include the Babel.Build.dll in my winform I may be able to do it seamlessly. public static int ExecuteCommand(string Command, int Timeout) { int ExitCode; ProcessStartInfo ProcessInfo; Process Process; ProcessInfo = new ProcessStartInfo("cmd.exe", "/C " + Command); ProcessInfo.CreateNoWindow = true; ProcessInfo.UseShellExecute = false; Process = Process.Start(ProcessInfo); Process.WaitForExit(Timeout); ExitCode = Process.ExitCode; Process.Close(); return ExitCode; }

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• Log "date -s" command

  - by LinuxPenseur

  Hi, I know that the date -s <STRING> command sets the time described by the string STRING. What i want is to log the above command whenever it is used to set the time into the file /tmp/log/user.log. In my Linux distribution the logging is done by syslog-ng. I already have some logs going into /tmp/log/user.log. This is the content of /etc/syslog-ng/syslog-ng.conf in my system for logging into /tmp/log/user.log destination d_notice { file("/tmp/log/user.log");}; filter f_filter10 { level(notice) and not facility(mail,authpriv,cron); }; log { source(s_sys); filter(f_filter10); destination(d_notice); }; What should i do so that date -s command is also logged into /tmp/log/user.log

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• Is it possible to set the name of the current virtual desktop via commandline?

  - by Dave Vogt

  The utility wmctrl has the possiblity to list the names of all virtual desktops: % wmctrl -d 0 - DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 Mail / Comm 1 * DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 Web / Docs 2 - DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 A 3 - DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 B I would like to be able to change, from the commandline, the name of the current desktop to something else. This is possible by using some pagers, for example, but I couldn't find out how to do it from the command line. Update: the xprop utility seems to be able to set the desktop names, but I could not figure out the exact format to do so, yet: % xprop -root -f _NET_DESKTOP_NAMES 8s -set _NET_DESKTOP_NAMES asdf % xprop -root _NET_DESKTOP_NAMES _NET_DESKTOP_NAMES(UTF8_STRING) = "asdf", "Web / Docs", "A"

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• How do I consume a COM+ local server from C#?

  - by Mystere Man

  I have a web application from a company that has gone out of business. We're looking to extend the web app a bit with some asp.net functionality. The web app was written as an ISAPI application in Delphi, and uses COM+ to talk to the SQL Server and handles things like session management and authentication. So, in order to get the current user and other details, I have to use the undocument COM+ components. I was able to dig out the type library and auto generated IDL, but at this point i'm lost in creating a .NET proxy class for this. Is there a way to autogenerate the .net COM+ proxy either from the .dll itself (extracting the typelib info) or from the IDL? Note: These seem to be simple COM style objects hosted in COM+ servers, no subscriptions or transaction monitoring..

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• using C function in C#

  - by andrew

  i have a dll, built with mingw one of the header files contains this: extern "C" { int get_mac_address(char * mac); //the function returns a mac address in the char * mac } I use this dll in another c++ app, built using Visual C++ (2008SP1), not managed, but plain c++ (simply include the header, and call the function) But now I have to use it in a C# application The problem is that i can't figure out how exactly (i'm new in .net programming) this is what i've tried public class Hwdinfo { [DllImport("mydll.dll")] public static extern void get_mac_address(string s); } When i call the function, nothing happens (the mydll.dll file is located in the bin folder of the c# app, and it gives me no errors or warnings whatsoever)

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