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Articles indexed in April 2010

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  • Why does Windows spooler require an administrator account?

    - by Software Monkey
    Does anyone know what changes I might need to make to allow restricted users to print using a printer configured for spooling? My Windows XP SP3 system currently requires me to use an Admin account for printing if the printer is configured to spool documents before printing. If the printer is configured for direct printing it works for all accounts. This used to work and some months back it just stopped, and I can't pin down why. The printer, which is an HP PSC 1200 (an old printer) itself is configured for Everyone to have Print authority and my specific (restricted) account to have Full authority, that is Print, Manage Printers and Manager Documents. My HDD is locked down for restricted users given them only read authority to the entire file system except their data directories, which is how I have run my systems for years. I assume there may be a directory somewhere that I need to allow users to write to.

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  • SQL Saturday Atlanta: Intro To Performance Tuning

    - by Mike Femenella
    I'm looking forward to speaking in Atlanta on the 24th, will be fun to get back down that way to visit with some friends and present two topics that I really enjoy. First, an introduction to performance tuning. Performance tuning is a very wide and deep topic and we're staying close to the surface. I direct this class for newbie sql users who have less than 2 years of experience. It's all the things I wish someone would have told me in my first 2 years about what to look for when the database was slow...or allegedly slow I should say. We'll cover using profiler to find slow performing queries and how to save the data off to a table as well as a tour of other features. The difference between clustered, non clustered and covering indexes. How to look at and understand an execution plan (at a high level) and finally the difference between a temp table and a table variable and what the implications are of using either one in your code. That pretty much takes up a full hour. Second presentation, Loading Data in Real Time. It's really a presentation about partitioning but with a twist that we used at work recently to solve a need to load some data quickly and put it into production with minimal downtime. We'll cover partition functions, schemes,$partition, merge, sys.partitions and show some examples of building a set of partitioned tables and using the switch statement to move it from one table to another. Finally we'll cover the differences in partitioning between 2005 and 2008. Hope to see you there! And if you read my blog please introduce yourself!

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  • Moving and resizing JPanels object inside JFrame.

    - by Gabriel A. Zorrilla
    Continuing my quest of learning Java by doing a simple game, i stumbled upon a little issue. My gameboard extends JPanel as well as each piece of the board. Now, this presents some problems: Cant set size of each piece, therefore, each piece JPanel ocupy the whole JFrame, concealing the rest of the pieces and the background (gameboard). Cant set the position of the pieces. I have the default flow manager. Tried setbounds and no luck. Perhaps i should make the piece to extend other JComponent?

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  • Core Data - How to check if a managed object's properties have been deallocated?

    - by georryan
    I've created a program that uses core data and it works beautifully. I've since attempted to move all my core data methods calls and fetch routines into a class that is self contained. My main program then instantiates that class and makes some basic method calls into that class, and the class then does all the core data stuff behind the scenes. What I'm running into, is that sometimes I'll find that when I grab a managed object from the context, I'll have a valid object, but its properties have been deallocated, and I'll cause a crash. I've played with the zombies and looked for memory leaks, and what I have gathered is it seems that the run loop is probably responsible for deallocating the memory, but I'm not sure. Is there a way to determine if that memory has been deallocated and force the core data to get it back if I need to access it? My managedObjectContext never gets deallocated, and the fetchedResultsController never does, either. I thought maybe I needed to use the [managedObjectContext refreshObject:mergeData:] method, or the [managedObjectContext setRetainsRegisteredObjects:] method. Although, I'm under the impression that last one may not be the best bet since it will be more memory intensive (from what I understand). These errors only popped up when I moved the core data calls into another class file, and they are random when they show up. Any insight would be appreciated. -Ryan

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  • Linq to SQL and concurrency with Rob Conery repository pattern

    - by David Hall
    I have implemented a DAL using Rob Conery's spin on the repository pattern (from the MVC Storefront project) where I map database objects to domain objects using Linq and use Linq to SQL to actually get the data. This is all working wonderfully giving me the full control over the shape of my domain objects that I want, but I have hit a problem with concurrency that I thought I'd ask about here. I have concurrency working but the solution feels like it might be wrong (just one of those gitchy feelings). The basic pattern is: private MyDataContext _datacontext private Table _tasks; public Repository(MyDataContext datacontext) { _dataContext = datacontext; } public void GetTasks() { _tasks = from t in _dataContext.Tasks; return from t in _tasks select new Domain.Task { Name = t.Name, Id = t.TaskId, Description = t.Description }; } public void SaveTask(Domain.Task task) { Task dbTask = null; // Logic for new tasks omitted... dbTask = (from t in _tasks where t.TaskId == task.Id select t).SingleOrDefault(); dbTask.Description = task.Description, dbTask.Name = task.Name, _dataContext.SubmitChanges(); } So with that implementation I've lost concurrency tracking because of the mapping to the domain task. I get it back by storing the private Table which is my datacontext list of tasks at the time of getting the original task. I then update the tasks from this stored Table and save what I've updated This is working - I get change conflict exceptions raised when there are concurrency violations, just as I want. However, it just screams to me that I've missed a trick. Is there a better way of doing this? I've looked at the .Attach method on the datacontext but that appears to require storing the original version in a similar way to what I'm already doing. I also know that I could avoid all this by doing away with the domain objects and letting the Linq to SQL generated objects all the way up my stack - but I dislike that just as much as I dislike the way I'm handling concurrency.

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  • Of patents, open source, and IBM

    <b>Cyber Cynic:</b> "After covering the war of words over IBM's use of patents in a business dispute with French start-up TurboHercules and giving my two cents on this open-source family fight, I'd hope the matter would die down. I was wrong."

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  • Exploratory Question for Security Admins (/etc/passwd + PHP)

    - by JPerkSter
    Hi everyone, I've been seeing a few issues lately on a few of my servers where an account gets hacked via outdated scripts, and the hacker uploads a cPanel / FTP Brute forcing PHP script inside the account. The PHP File reads /etc/passwd to get the usernames, and than uses a passwd.txt file to try and brute force it's way in to 127.0.0.1:2082. I'm trying to think of a way to block this. It doesn't POST anything except "GET /path/phpfile.php", so I can't use mod_security to block this. I've been thinking of maybe changing permissions on /etc/passwd to 600, however I'm unsure how this will result in regards to my users. I was also thinking of rate-limiting localhost connections to :2082, however I'm worried about mod_proxy being affected. Any suggestions?

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  • Compile C# into objective-C

    - by Ali Shafai
    Now that monotouch is being banned, I was wondering if there is a way to translate C# (or some other modern language for that matter) into objective-C? I won't mind using apple's api as long as I don't have to declare my variables in 3-4 stages (ivar-property-synthesize-dealloc). All I want is a less wordy language to concentrate on my intent and not on the compiler syntax. unfortunately apple in its arrogance thinks objective-c is a "modern" language and if you are looking for an alternative (monotouch) it's because you are incapable of coding. also if you don't find programming in itunes; sorry, xcode enjoyable, it is not because there are better alternatives, it's because you are stupid. anyway back to my original question: can it be done?

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  • How to display image that is located on another server on the network (ASP.NET)

    - by eviljack
    I've got a ASP.NET site that's located on a local server (MY_SERVER). And one of the things it does is pull up tiff files which are located on another server (ANOTHER_SERVER). The location of each of these files is stored in SQL. I pull up each of these images and am supposed to display them. The problem is: the files are not named with a tiff extension (does it matter?) they aren't displaying at all. I am using an Image control to display these images, and I'm not sure if it matters that the extension is not set (does the image control know the difference between an jpg and a tiff without the extension?) I am guessing the images aren't displaying because they are not on the same server MY_SERVER that the images are located (ANOTHER_SERVER). Any ideas on how to fix this?

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  • SQL model optimization question

    - by supermogx
    I need to keep track of number of "hits" on a particular item in a DB. The thing is that the "hits" should stay unique with a user ID, so if a user hits the item 3 times, it should still count for a hit of 1. Also, I need to display the total number of hits for a particular item. Is there a better way than to store each hits for each items by each users in a separate table? Would keeping the user ID in a string separated by commas a better and efficient way?

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  • ViewModel updates after Model server roundtrip

    - by Pavel Savara
    I have stateless services and anemic domain objects on server side. Model between server and client is POCO DTO. The client should become MVVM. The model could be graph of about 100 instances of 20 different classes. The client editor contains diverse tab-pages all of them live-connected to model/viewmodel. My problem is how to propagate changes after server round-trip nice way. It's quite easy to propagate changes from ViewModel to DTO. For way back it would be possible to throw away old DTO and replace it whole with new one, but it will cause lot of redrawing for lists/DataTemplates. I could gather the server side changes and transmit them to client side. But the names of fields changed would be domain/DTO specific, not ViewModel specific. And the mapping seems nontrivial to me. If I should do it imperative way after round-trip, it would break SOC/modularity of viewModels. I'm thinking about some kind of mapping rule engine, something like automappper or emit mapper. But it solves just very plain use-cases. I don't see how it would map/propagate/convert adding items to list or removal. How to identify instances in collections so it could merge values to existing instances. As well it should propagate validation/error info. Maybe I should implement INotifyPropertyChanged on DTO and try to replay server side events on it ? And then bind ViewModel to it ? Would binding solve the problems with collection merges nice way ? Is EventAgregator from PRISM useful for that ? Is there any event record-replay component ? Is there better client side pattern for architecture with server side logic ?

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  • HOM with Objective C

    - by Coxer
    Hey, i am new to objective C, but i tried to use HOM in order to iterate over an NSArray and append a string to each element. here is my code: void print( NSArray *array ) { NSEnumerator *enumerator = [array objectEnumerator]; id obj; while ( nil!=(obj = [enumerator nextObject]) ) { printf( "%s\n", [[obj description] cString] ); } } int main( int argc, const char *argv[] ) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSArray *names = [[NSArray alloc] init]; NSArray *names_concat = [[NSArray alloc] init]; names = [NSArray arrayWithObjects:@"John",@"Mary",@"Bob",nil]; names_concat = [[names collect] stringByAppendingString: @" Doe"]; print(names_concat); [pool release]; } What is wrong with this code? My compiler (gcc) says NSArray may not respond to "-collect"

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  • AS3 Classes - Should I use them?

    - by Eric
    I'm working on a project in Flash CS4/AS3 and I have a document class set up but I am wondering about using that, as opposed to frame-based scripting. Most of what I have seen so far deals with how to create them, but doesn't offer much about why or when to use them. I know I can also pull in other classes beyond the document class but, again, why and when? Could I get some input from you fine people out there on usage/best practice, etc? Thanks

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  • load testing of "cookieless Session" asp.net

    - by anshu
    I have been trying using MS VSTS 2008, no luck so far.. After the redirection from server to accomodate the sessionID in URL, the test fails during the first time recording. I am open to looking at other tools which are not very expensive. Does anyone have any experience using any tool for testing cookieless sessionID website?

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  • How to parse IP addresses with perl?

    - by Andrey Zentavr
    Hello! I have list of IPs: 238.51.208.96/28 238.51.209.180-199 238.51.209.100-109 238.51.213.2-254 ... How can I easily parse them? I need first and last IP from range. For First line I can use Net::Netmask CPAN module, but what can I do with others lines?

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  • When is a PHP project too small for a framework?

    - by Jonathan Nicol
    I'm about to start on a small, static website project: no database or CMS required. Basically, a brochure website. I used the CodeIgniter framework recently to develop a full-blown web application, and I'm wondering if it appropriate to also use CI for smaller, simpler sites. Typically for a static brochure site I would write regular PHP pages with a few includes thrown in to save on repetition (i.e. HTML with a sprinking of PHP), but this time around I'm wondering if my new friend CodeIgniter might be able to streamline the development process. Is it sensible to consider a framework for such a simple project, or is it overkill? I'm worried that I might be the proverbial carpenter whose only tool is a hammer, and sees every problem as a nail!

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  • How to get maven gwt 2.0 build working

    - by Pieter Breed
    EDIT: Added some of the output of the mvn -X -e commands at the end My company is developing a GWT application. We've been using maven 2 and GWT 1.7 successfully for quite a while. We recently decided to upgrade to GWT 2.0. We've already updated the eclipse project and we are able to successfully run the application in dev-mode. We are struggling to get the application built using maven though. I'm hoping somebody can tell me what I'm doing wrong here since I'm running out of time on this. The exacty bit of the output that worries me is the 'GWT compilation skipped' message: [INFO] Copying 119 resources [INFO] [compiler:compile {execution: default-compile}] [INFO] Compiling 704 source files to K:\iCura\assessor\target\classes [INFO] [gwt:compile {execution: default}] [INFO] using GWT jars for specified version 2.0.0 [INFO] establishing classpath list (scope = compile) [INFO] com.curasoftware.assessor.Assessor is up to date. GWT compilation skipped [INFO] [jspc:compile {execution: jspc}] [INFO] Built File: \index.jsp I'm pasting the gwt-maven-plugin section below. If you need anything else please ask. <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>gwt-maven-plugin</artifactId> <version>1.2</version> <configuration> <localWorkers>1</localWorkers> <warSourceDirectory>${basedir}/war</warSourceDirectory> <logLevel>ALL</logLevel> <module>${cura.assessor.module}</module> <!-- use style OBF for prod --> <style>OBFUSCATED</style> <extraJvmArgs>-Xmx2048m -Xss1024k</extraJvmArgs> <gwtVersion>${version.gwt}</gwtVersion> <disableCastChecking>true</disableCastChecking> <soyc>false</soyc> </configuration> <executions> <execution> <goals> <!-- plugin goals --> <goal>clean</goal> <goal>compile</goal> </goals> </execution> </executions> </plugin> I executed mvn clean install -X -e and this is some of the output that I get: [DEBUG] Configuring mojo 'org.codehaus.mojo:gwt-maven-plugin:1.2:compile' --> [DEBUG] (f) disableCastChecking = true [DEBUG] (f) disableClassMetadata = false [DEBUG] (f) draftCompile = false [DEBUG] (f) enableAssertions = false [DEBUG] (f) extra = K:\iCura\assessor\target\extra [DEBUG] (f) extraJvmArgs = -Xmx2048m -Xss1024k [DEBUG] (f) force = false [DEBUG] (f) gen = K:\iCura\assessor\target\.generated [DEBUG] (f) generateDirectory = K:\iCura\assessor\target\generated-sources\gwt [DEBUG] (f) gwtVersion = 2.0.0 [DEBUG] (f) inplace = false [DEBUG] (f) localRepository = Repository[local|file://K:/iCura/lib] [DEBUG] (f) localWorkers = 1 [DEBUG] (f) logLevel = ALL [DEBUG] (f) module = com.curasoftware.assessor.Assessor [DEBUG] (f) project = MavenProject: com.curasoftware.assessor:assessor:3.5.0.0 @ K:\iCura\assessor\pom.xml [DEBUG] (f) remoteRepositories = [Repository[gwt-maven|http://gwt-maven.googlecode.com/svn/trunk/mavenrepo/], Repository[main-maven|http://www.ibiblio.org/maven2/], Repository[central|http://repo1.maven.org/maven2]] [DEBUG] (f) skip = false [DEBUG] (f) sourceDirectory = K:\iCura\assessor\src [DEBUG] (f) soyc = false [DEBUG] (f) style = OBFUSCATED [DEBUG] (f) treeLogger = false [DEBUG] (f) validateOnly = false [DEBUG] (f) warSourceDirectory = K:\iCura\assessor\war [DEBUG] (f) webappDirectory = K:\iCura\assessor\target\assessor [DEBUG] -- end configuration -- and then this: [DEBUG] SOYC has been disabled by user [DEBUG] GWT module com.curasoftware.assessor.Assessor found in K:\iCura\assessor\src [INFO] com.curasoftware.assessor.Assessor is up to date. GWT compilation skipped [DEBUG] com.curasoftware.assessor:assessor:war:3.5.0.0 (selected for null) [DEBUG] com.curasoftware.dto:dto-gen:jar:3.5.0.0:compile (selected for compile) ... It's finding the correct sourceDirectory. That folders has a 'com' folder within which ultimately is the source of the application organized in folders as per the package structure.

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