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• 4 Key Ingredients for the Cloud

  - by Kellsey Ruppel

  It's a short week here with the US Thanksgiving Holiday. So, before we put on our stretch pants and get ready to belly up to the dinner table for turkey, stuffing and mashed potatoes, let's spend a little time this week talking about the Cloud (kind of like the feathery whipped goodness that tops the infamous Thanksgiving pumpkin pie!) But before we dive into the Cloud, let's do a side by side comparison of the key ingredients for each. Cloud Whipped Cream  Application Integration  1 cup heavy cream  Security  1/4 cup sugar  Virtual I/O  1 teaspoon vanilla  Storage  Chilled Bowl It’s no secret that millions of people are connected to the Internet. And it also probably doesn’t come as a surprise that a lot of those people are connected on social networking sites.  Social networks have become an excellent platform for sharing and communication that reflects real world relationships and they play a major part in the everyday lives of many people. Facebook, Twitter, Pinterest, LinkedIn, Google+ and hundreds of others have transformed the way we interact and communicate with one another.Social networks are becoming more than just an online gathering of friends. They are becoming a destination for ideation, e-commerce, and marketing. But it doesn’t just stop there. Some organizations are utilizing social networks internally, integrated with their business applications and processes and the possibility of social media and cloud integration is compelling. Forrester alone estimates enterprise cloud computing to grow to over $240 billion by 2020. It’s hard to find any current IT project today that is NOT considering cloud-based deployments. Security and quality of service concerns are no longer at the forefront; rather, it’s about focusing on the right mix of capabilities for the business. Cloud vs. On-Premise? Policies & governance models? Social in the cloud? Cloud’s increasing sophistication, security in applications, mobility, transaction processing and social capabilities make it an attractive way to manage information. And Oracle offers all of this through the Oracle Cloud and Oracle Social Network. Oracle Social Network is a secure private network that provides a broad range of social tools designed to capture and preserve information flowing between people, enterprise applications, and business processes. By connecting you with your most critical applications, Oracle Social Network provides contextual, real-time communication within and across enterprises. With Oracle Social Network, you and your teams have the tools you need to collaborate quickly and efficiently, while leveraging the organization’s collective expertise to make informed decisions and drive business forward. Oracle Social Network is available as part of a portfolio of application and platform services within the Oracle Cloud. Oracle Cloud offers self-service business applications delivered on an integrated development and deployment platform with tools to rapidly extend and create new services. Oracle Social Network is pre-integrated with the Fusion CRM Cloud Service and the Fusion HCM Cloud Service within the Oracle Cloud. If you are looking for something to watch as you veg on the couch in a post-turkey dinner hangover, you might consider watching these how-to videos! And yes, it is perfectly ok to have that 2nd piece of pie

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• Procedual level generation for a platformer game (tilebased) using player physics

  - by Notbad

  I have been searching for information about how to build a 2d world generator (tilebased) for a platformer game I am developing. The levels should look like dungeons with a ceiling and a floor and they will have a high probability of being just made of horizontal rooms but sometimes they can have exits to a top/down room. Here is an example of what I would like to achieve. I'm refering only to the caves part. I know level design won't be that great when generated but I think it is possible to have something good enough for people to enjoy the procedural maps (Note: Supermetrod Spoiler!): http://www.snesmaps.com/maps/SuperMetroid/SuperMetroidMapNorfair.html Well, after spending some time thinking about this I have some ideas to create the maps that I would like to share with you: 1) I have read about celular automatas and I would like to use them to carve the rooms but instead of carving just a tile at once I would like to carve full columns of tiles. Of course this carving system will have some restrictions like how many tiles must be left for the roof and the ceiling, etc... This way I could get much cleaner rooms than using the ussual automata. 2) I want some branching into the rooms. It will have little probability to happen but I definitely want it. Thinking about carving I came to the conclusion that I could be using some sort of path creation algorithm that the carving system would follow to create a path in the rooms. This could be more noticiable if we make the carving system to carve columns with the height of a corridor or with the height of a wide room (this will be added to the system as a param). This way at some point I could spawn a new automa beside the main one to create braches. This new automata should play side by side with the first one to create dead ends, islands (both paths created by the automatas meet at some point or lead to the same room. It would be too long to explain here all the tests I have done, etc... just will try to summarize the problems to see if anyone could bring some light to solve them (I don't mind sharing my successes but I think they aren't too relevant): 1) Zone reachability: How can I make sure that the player will be able to reach all zones I created (mainly when branches happen or vertical rooms are created). When branches are created I have to make sure that there will be a way to get onto the new created branch. I mean a bifurcation that the player could follow. Player will follow the main path or jump to a platform to get onto the other way). On the other hand if an island is created by the meeting of both branches I need to make sure the player will be able to get onto the island too. 2) When a branch is created and corridors are generated for each branch how can I make then both merge or repel to create an island or just make them separated corridors. 3) When I create a branch and an island is created becasue both corridors merge at somepoint or they lead to the same room, is there any way to detect this and randomize where to create the needed platforms to get onto the created isle? This platforms could be created at the start of the island or at the end. I guess part of the problem could be solved using some sort of graph following the created paths but I'm a bit lost in this sea of precedural content creation :). On the other hand I don't expect a solution to the problem but some information to get me moving forward again. Thanks in advance.

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• Share code between projects in tfs 2010

  - by Jimmy Engtröm

  Hi What is the best way to handle code sharing in TFS 2010? We have a couple of Visual studio projects that other Visual Studio projects use. ex: Shared Project Project 1 Solution -Shared Project -Project 1 Project Project 2 Solution -Shared Project -Project 2 Project Also we have Third party code for example: Third Party -Telerik --2009.1.402.35 --2009.02.0701.35 When I open my "Project 1" solution i want my shared code project to be included in that solution. (thats the way we work today). We basically have one TFS Project that contains all the code. Now we want to use it the "right" (?) way, We would like to have Project 1 and 2 in separate TFS solutions. If I for example makes sure we have all our project in the same structure on disk and just add the shared project to my Project 1 solution (even if the projects reside in two different TFS Projects) would that work with builds? How have you solved the problem, I guess we are not the only ones having shared code between projects? Cheers /Jimmy

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• NullPointerException when showing JFileChooser

  - by Geo

  I show a JFileChooser with this snippet: public File getDestination() { JFileChooser chooser = new JFileChooser(); chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); int option = chooser.showSaveDialog(null); if(option == JFileChooser.APPROVE_OPTION) { return chooser.getSelectedFile().getAbsolutePath(); } return new File("."); } Usually, the first time it's showed, it displays & works correctly. The second time, it will always throw this exception: Exception in thread "Basic L&F File Loading Thread" java.lang.NullPointerException at sun.awt.shell.Win32ShellFolder2.pidlsEqual(Unknown Source) at sun.awt.shell.Win32ShellFolder2.equals(Unknown Source) at sun.awt.shell.Win32ShellFolderManager2.isFileSystemRoot(Unknown Source) at sun.awt.shell.ShellFolder.isFileSystemRoot(Unknown Source) at javax.swing.filechooser.FileSystemView.isFileSystemRoot(Unknown Source) at javax.swing.filechooser.WindowsFileSystemView.isTraversable(Unknown Source) at javax.swing.JFileChooser.isTraversable(Unknown Source) at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run0(Unknown Source) at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run(Unknown Source) Java -version says: java version "1.6.0_20" Java(TM) SE Runtime Environment (build 1.6.0_20-b02) Java HotSpot(TM) Client VM (build 16.3-b01, mixed mode, sharing) And the thread I found here says I should downgrade the Java version. Should I follow their advice, or is there something I could have done wrong?

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• close long poll connection, jQuery-ajax

  - by MyGGaN

  Background I use a Tornado-like server with support for long-polls. Each web pages a user clicks around to sets up a long poll to the server like this: $.ajax({ type: 'GET', url: "/mylongpollurl/", dataType: 'application/json', success: function(json) { // I do stuff here }, error: function(xhr, errText, ex) { // If timeout I send a new long-poll request } }); Problem I will now rely on data that I get from Fiddler monitoring all requests made from my browser (FF at the moment). Page 1 is loaded and the long poll request is made, now idling at server side. I click a link to page 2 and that page is loaded and setting up a long poll request, BUT the long poll request from page 1 is still idling at server side (according to Fiddler). This means that I will stack all long poll calls when clicking around the page, thus end up with lots of active connections on the server (or are they maybe sharing connection?) My thoughts - As it's a Tornado-like server (using epoll) it can handle quite a lot of connections. But this fact is not to exploit in my opinion. What I mean is that I prefer not to have a timeout on the server for this case (were the client disappears). - I know those stand alone pages better uses a common head and only swap content via ajax calls but this design we use today was not my call... - The best way to solve this would probably be to have the connection reused (hard to pull off I think) or closed as soon as the browser leaves the page (you click to another page). Thanks -- MyGGaN

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• Git subtree not properly using .gitignore when doing a partial clone

  - by D W

  I am a graduate student with many scripts, bibliography data in bibtex, thesis draft in latex, presentations in open office, posters in scribus, and figures and result data. I would like to put everything in one project under version control. Then when I need to work on a portion such as the bibliography data, I would like to check that subdirectory out, modify it as necessary and merge it back.I would like the ability to check out one version to my home computer, and a different one to my work computer and make changes to each independently and eventually merge them back. I would also like to be able to check out a piece of code from this big project and import it with versioning into a separate project. If I may changes I'd like to be able to merge them back to the original project. Based on my understanding git subtree can do this. http://github.com/apenwarr/git-subtree There is an example that is along the lines of what I'm trying to do at: http://psionides.jogger.pl/2010/02/04/sharing-code-between-projects-with-git-subtree/ Say the trunk of my project contained the directories: (bib bin cfg data fig src todo). When I use git subtree split -P bib -b export git checkout export I get a the bib directory, plus all files that should have been ignored or considered binary based on .gitignore such as the src directory and everything in it that ends in a tilde or the ./data directory. dwickrama@DWwork:~/research/trunk$ ls * -r biblography.bib JabRef src: script1.sh~ README~ script2.sh~ script3.sh~ script4.R~ script5.awk~ script5.py~ cfg: cfgFile1.ini~ cfgFile2.ini~ cfgFile3.ini~ bin: bigBinaryPackage1 bigBinaryPackage2 dwickrama@DWwork:~/research/trunk$ My .gitignore file is as follows: *.doc diff=word *.tex diff=tex *.bib diff=bibtex *.py diff=python *.eps binary *.jpg binary *.png binary ./bin/* binary *~ How do I prevent this?

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• Is this a good implementation of DefaultHttpClient and ThreadSafeClientConnManager in Android?

  - by johnrock

  In my Android app I am sharing one httpclient for all activities/threads. All requests are made by callling getHttpClient().execute(httpget) or getHttpClient().execute(httppost). Is this implementation complete/correct and safe for multiple threads? Is there anything else missing i.e. Do I have to worry about releasing connections at all? private static HttpClient httpclient ; public static HttpClient getHttpClient() { if(httpclient == null){ return getHttpClientNew(); } else{ return httpclient; } } public static synchronized HttpClient getHttpClientNew() { HttpParams params = new BasicHttpParams(); ConnManagerParams.setMaxTotalConnections(params, 100); HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1); HttpProtocolParams.setContentCharset(params, "UTF_8"); HttpProtocolParams.setUseExpectContinue(params, false); HttpConnectionParams.setConnectionTimeout(params, 10000); HttpConnectionParams.setSoTimeout(params, 10000); SchemeRegistry schemeRegistry = new SchemeRegistry(); schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80)); ClientConnectionManager cm = new ThreadSafeClientConnManager(params, schemeRegistry); httpclient = new DefaultHttpClient(cm, params); return httpclient; } This is an example of how the httpclient is used: private void update() { HttpGet httpget = new HttpGet(URL); httpget.setHeader(USER_AGENT, userAgent); httpget.setHeader(CONTENT_TYPE, MGUtils.APP_XML); HttpResponse response; try { response = getHttpClient().execute(httpget); HttpEntity entity = response.getEntity(); if (entity != null) { // parse stuff } } catch (Exception e) { } }

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• Using git subtree to clone a subdirectory of a project with versioning history then merge it back af

  - by D W

  I am a graduate student with many scripts, bibliography data in bibtex, thesis draft in latex, presentations in open office, posters in scribus, and figures and result data. I would like to put everything in one project under version control. Then when I need to work on a portion such as the bibliography data, I would like to check that subdirectory out, modify it as necessary and merge it back.I would like the ability to check out one version to my home computer, and a different one to my work computer and make changes to each independently and eventually merge them back. I would also like to be able to check out a piece of code from this big project and import it with versioning into a separate project. If I may changes I'd like to be able to merge them back to the original project. Based on my understanding git subtree can do this. http://github.com/apenwarr/git-subtree There is an example that is along the lines of what I'm trying to do at: http://psionides.jogger.pl/2010/02/04/sharing-code-between-projects-with-git-subtree/ This code is from that site: git clone git://git2.kernel.org/pub/scm/git/git.git newtree=$(git subtree split --prefix=gitweb --annotate='(split) ' \ 0a8f4f0^.. --onto=1130ef3 --rejoin) git branch latest_gitweb $newtree gitk latest_gitweb Say the trunk of my project contained the directories: (bib bin cfg data fig src todo). How would I use git-subtree to split off the bib (bibliography) directory with versioning? When I use git-subtree split --prefix=bib I get 884842f6f4e9896e2e4e9402ee0ef762cd617257 as output, but I don't know where to go from there.

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• How to share session cookies between Internet Explorer and an ActiveX components hosted in a webpage

  - by jerem

  I am currently working on a .Net application which makes HTTP requests to some web applications hosted on a IIS server. The application is deployed through ClickOnce and is working fine on simple networks architectures. One of our customers has a very complex network involving a custom authentication server on which the user has first to log himself in order to be authenticated and get access to other applications on this network. Once authenticated on this server, a session cookie is created and sent to the user. Every time the user then makes a request on a secured server of the network, this cookie is checked to grant access to the user. If this cookie is not sent with the request, the user is redirected to the login page. The only browser used is Internet Explorer. This cookie cannot be accessed from our .net application since it is executed in another process than the Internet Explorer process which was used to log the user in, and thus is not sent with our requests, which cannot be completed since the server redirects every of our requests to the login page. I had a look at embedding my application into Internet Explorer by making the main control COM visible and creating it on an HTML page with an tag. It is working properly, however the sessions cookies set earlier in the browser are not sent when the ActiveX control makes web requests. I was hoping this sharing of the session information would be automatic (although I didn't really believe it). So my questions are : Is it possible to have access to this cookie in the embedded ActiveX? How? Does it make a difference to use a .Net COM-interop component instead of a "true" ActiveX control? Also, are there specific security words to describe this kind of behaviors (given that I am not an expert at all on security topics, this lack of proper terminology makes it a lot harder to find the needed resources)? My goal is to have my application's requests look the same from the requests made by the host browser's requests, and I thought that embedding the application as an ActiveX control into the browser was the only way to achieve this, however any suggestion on another to do this is welcome.

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• Python progression path - From apprentice to guru

  - by Morlock

  Hi all, I've been learning, working, and playing with Python for a year and a half now. As a biologist slowly making the turn to bio-informatics, this language has been a the very core of all the major contributions I have made in the lab. (bash and R scripts have helped some too. My C++ capabilities are very not functional yet). I more or less fell in love with the way Python permits me to express beautiful solutions and also with the semantics of the language that allows such a natural flow from thoughts to workable code. What I would like to know from you is your answer to a kind of question I have seldom seen in this or other forums. Let me sum up what I do NOT want to ask first ;) I don't want to know how to QUICKLY learn Python Nor do I want to find out the best way to get acquainted with the language Finally, I don't want to know a 'one trick that does it all' approach. What I do want to know your opinion about, is: What are the steps YOU would recommend to a Python journeyman, from apprenticeship to guru status (feel free to stop wherever your expertise dictates it), in order that one IMPROVES CONSTANTLY, becoming a better and better Python coder, one step at a time. The kind of answers I would enjoy (but feel free to surprise the readership :P ), is formatted more or less like this: Read this (eg: python tutorial), pay attention to that kind of details Code for so manytime/problems/lines of code Then, read this (eg: this or that book), but this time, pay attention to this Tackle a few real-life problems Then, proceed to reading Y. Be sure to grasp these concepts Code for X time Come back to such and such basics or move further to... (you get the point :) This process depicts an iterative Learn/Code cycle, and I really care about knowing your opinion on what exactly one should pay attention to, at various stages, in order to progress CONSTANTLY (with due efforts, of course). If you come from a specific field of expertise, discuss the path you see as appropriate in this field. Thanks a lot for sharing your opinions and good Python coding!

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• issues make a persistent object in Objective C

  - by oden

  Attempting to make a NSObject called 'Person' that will hold the login details for my application (nothing to fancy). The app is made of a navigation controller with multiple table views but I am having issues sharing the Person object around. Attempted to create a static object like this: + (Person *)sharedInstance { static Person *sharedInstance; @synchronized(self) { if(!sharedInstance) sharedInstance = [[Person alloc] init]; return sharedInstance; } return nil; } And here is the header // Person.h #import <Foundation/Foundation.h> @interface Person : NSObject { NSString *fullName; NSString *firstName; NSString *lastName; NSString *mobileNumber; NSString *userPassword; } @property(nonatomic, retain) NSString *fullName; @property(nonatomic, retain) NSString *firstName; @property(nonatomic, retain) NSString *lastName; @property(nonatomic, retain) NSString *mobileNumber; @property(nonatomic, retain) NSString *userPassword; + (Person *)sharedInstance; -(BOOL) setName:(NSString*) fname; -(BOOL) setMob:(NSString*) mnum; -(BOOL) setPass:(NSString*) pwd; @end This object setters and getters are needed in different parts of the application. I have been attempting to access them like this Person * ThePerson = [[Person alloc] init]; ThePerson = nil; NSString * PersonsName; PersonsName = [[Person sharedInstance] firstName]; Everything works well at the login screen but it dies at the next use. usually EXC_BAD_ACCESS (eek!). Clearly I am doing something very wrong here. Is there an easier way to share objects between different a number view controllers (both coded and xib)?

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• Android SDK fails to install

  - by Paul Breed

  When I try to install the android SDK it fails to install. My OS is Windows XP I just downloaded and installed Java JDK 1.6 Java -version from the command line returns: http://stackoverflow.com/questions/ask java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing) My environment vars have: JAVA_HOME=c:\progra~1\java\jdk1.6.0_11 I downloaded android-sdk-r04-windows.zip I unziped it in V:\AndroidInstall\ When I go to the V:\androindinstall\android-sdk-windows and type "SDK Install.exe" nothing happens... If I go this from graph When I do this from a graphical file viewer I get a quick flash that looks like a command line window and nothing.... When I try to run android list targets from the tool directory I get: Error: Error parsing the sdk. Error: V:\androindinstall\android-sdk-windows\platforms is missing. Error: Unable to parse SDK content. So the basic install setup is not happening. Additional clues: I have a G1 and Android 1.0 was running on this machine. (Almost a year ago) I've updated my G1 to 1.6 so I thought I'd update my SDK before starting new development. When I tried to upgrade it tried and then died as the "directory was in use" So I cleaned out all the android directories, rebooted and redownloaded everythign from scratch. Now it won't run at all. I've clearly got something in an unhappy state, but I've cleaned up all the directories and no remanants seem to be running I've rebooted.... I've missed somethign I just can't figure out what. Paul

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• Android Share - Facebook SDK - ShareActionProvider

  - by Vlasto Benny Lava

  I am trying to implement sharing a simple string inside my application. Obviously everything other than Facebook works. As far as I know, now I have to use their Facebook SDK to post statuses on a wall. However, if I do implement it using their SDK, is there a way to have it incorporated into the chooser (default or ShareActionProvider) and somehow override it and insert the Facebook SDK's implementation? Or do I have to create a dedicated button? //EDIT package com.example.shareactionproviderdemo; import android.app.Activity; import android.content.Intent; import android.os.Bundle; public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Intent sharingIntent = new Intent(Intent.ACTION_SEND); sharingIntent.setType("text/plain"); sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Test message"); startActivity(Intent.createChooser(sharingIntent, "Share using")); } }

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• nth ugly number

  - by Anil Katti

  Numbers whose only prime factors are 2, 3 or 5 are called ugly numbers. Example: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, ... 1 can be considered as 2^0. I am working on finding nth ugly number. Note that these numbers are extremely sparsely distributed as n gets large. I wrote a trivial program that computes if a given number is ugly or not. For n 500 - it became super slow. I tried using memoization - observation: ugly_number * 2, ugly_number * 3, ugly_number * 5 are all ugly. Even with that it is slow. I tried using some properties of log - since that will reduce this problem from multiplication to addition - but, not much luck yet. Thought of sharing this with you all. Any interesting ideas? Using a concept similar to "Sieve of Eratosthenes" (thanks Anon) for (int i(2), uglyCount(0); ; i++) { if (i % 2 == 0) continue; if (i % 3 == 0) continue; if (i % 5 == 0) continue; uglyCount++; if (uglyCount == n - 1) break; } i is the nth ugly number. Even this is pretty slow. I am trying to find 1500th ugly number.

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• Enterprise SSO & Identity management / recommendations

  - by Maxim Veksler

  Hello Friends, We've discussed SSO before. I would like to re-enhance the conversation with defined requirements, taking into consideration recent new developments. In the past week I've been doing market research looking for answers to the following key issues: The project should should be: Requirements SSO solution for web applications. Integrates into existing developed products. has Policy based password security (Length, Complexity, Duration and co) Security Policy can be managed using a web interface. Customizable user interface (the password prompt and co. screens). Highly available (99.9%) Scalable. Runs on Red Hat Linux. Nice to have Contains user Groups & Roles. Written in Java. Free Software (open source) solution. None of the solutions came up so far are "killer choice" which leads me to think I will be tooling several projects (OWASP, AcegiSecurity + X??) hence this discussion. We are ISV delivering front-end & backend application suite. The frontend is broken into several modules which should act as autonomous unit, from client point of view he uses the "application" - which leads to this discussion regrading SSO. I would appreciate people sharing their experience & ideas regarding the appropriete solutions. Some solutions are interesting CAS Sun OpenSSO Enterprise JBoss Identity IDM JOSSO Tivoli Access Manager for Enterprise Single Sign-On Or more generally speaking this list Thank you, Maxim.

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• Implementation review for a MVC.NET app with custom membership

  - by mrjoltcola

  I'd like to hear if anyone sees any problems with how I implemented the security in this Oracle based MVC.NET app, either security issues, concurrency issues or scalability issues. First, I implemented a CustomOracleMembershipProvider to handle the database interface to the membership store. I implemented a custom Principal named User which implements IPrincipal, and it has a hashtable of Roles. I also created a separate class named AuthCache which has a simple cache for User objects. Its purpose is simple to avoid return trips to the database, while decoupling the caching from either the web layer or the data layer. (So I can share the cache between MVC.NET, WCF, etc.) The MVC.NET stock MembershipService uses the CustomOracleMembershipProvider (configured in web.config), and both MembershipService and FormsService share access to the singleton AuthCache. My AccountController.LogOn() method: 1) Validates the user via the MembershipService.Validate() method, also loads the roles into the User.Roles container and then caches the User in AuthCache. 2) Signs the user into the Web context via FormsService.SignIn() which accesses the AuthCache (not the database) to get the User, sets HttpContext.Current.User to the cached User Principal. In global.asax.cs, Application_AuthenticateRequest() is implemented. It decrypts the FormsAuthenticationTicket, accesses the AuthCache by the ticket.Name (Username) and sets the Principal by setting Context.User = user from the AuthCache. So in short, all these classes share the AuthCache, and I have, for thread synchronization, a lock() in the cache store method. No lock in the read method. The custom membership provider doesn't know about the cache, the MembershipService doesn't know about any HttpContext (so could be used outside of a web app), and the FormsService doesn't use any custom methods besides accessing the AuthCache to set the Context.User for the initial login, so it isn't dependent on a specific membership provider. The main thing I see now is that the AuthCache will be sharing a User object if a user logs in from multiple sessions. So I may have to change the key from just UserId to something else (maybe using something in the FormsAuthenticationTicket for the key?).

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• How effective can this Tagging solution be?

  - by Pablo

  Im working on an image sharing site and want to implement tagging for the images. I've read Questions #20856 and #2504150 I have few concerns with the approach on the questions above. First of all it looks easy to link an image to a tag. However getting images by tag relation is not as easy. Not easy because you will have to get the image-to-tag relation from one table and then make a big query with a bunch of OR statements( one OR for every image). Before i even research the tagging topic i started testing the following method: This tables as examples: Table: Image Columns: ItemID, Title, Tags Table: Tag Columns: TagID, Name The Tags column in the Image table takes a string with multiple tagID from the Tag table enclosed by dashes(-). For example: -65-25-105- Links an image with the TagID 65,25 and 105. With this method i find it easier to get images by tag as i can get the TagID with one query and get all the images with another simple query like: SELECT * FROM Image WHERE Tags LIKE %-65-% So if i use this method for tagging, How effective this is? Is querying by LIKE %-65-% a slow process? What problems can i face in the future?

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• Why does Facebook iOS dialog for feed publish disappear after login?

  - by Mason G. Zhwiti

  I'm trying to use the Facebook iOS "feed" dialog call to allow my app's user to share something on their Facebook wall. When the facebook app is not installed, it attempts to let them authenticate within the app (presumably using a web view). The issue is that this dialog just disappears once they authenticate. I was expecting the web view to return to the "feed" sharing view. How do I detect that they authenticated so that I can re-open the feed dialog? I've added fbDidLogin to my app delegate, but it's not being called. (I wasn't sure if this would normally be called or not, but I read several people recommending this.) SBJSON *jsonWriter = [SBJSON new]; // The action links to be shown with the post in the feed NSArray* actionLinks = [NSArray arrayWithObjects:[NSDictionary dictionaryWithObjectsAndKeys: @"More Videos",@"name",@"http://www.example.com/",@"link", nil], nil]; NSString *actionLinksStr = [jsonWriter stringWithObject:actionLinks]; NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys: @"Test Caption", @"caption", @"Test Description", @"description", @"https://s3.amazonaws.com/example/images/test.png", @"source", self.video.blogLink, @"link", @"01234567890123", @"app_id", actionLinksStr, @"actions", nil]; [delegate facebook].sessionDelegate = delegate; [[delegate facebook] dialog:@"feed" andParams:params andDelegate:self];

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• RIA Services: Inserting multiple presentation-model objects

  - by nlawalker

  I'm sharing data via RIA services using a presentation model on top of LINQ to SQL classes. On the Silverlight client, I created a couple of new entities (album and artist), associated them with each other (by either adding the album to the artist's album collection, or setting the Artist property on the album - either one works), added them to the context, and submitted changes. On the server, I get two separate Insert calls - one for the album and one for the artist. These entitites are new so their ID values are both set to the default int value (0 - keep in mind that depending on my DB, this could be a valid ID in the DB) because as far as I know you don't set IDs for new entities on the client. This all would work fine if I was transferring the LINQ to SQL classes via my RIA services, because even though the Album insert includes the Artist and the Artist insert includes the Album, both are Entities and the L2S context recognizes them. However, with my custom presentation model objects, I need to convert them back to the LINQ to SQL classes maintaining the associations in the process so they can be added to the L2S context. Put simply, as far as I can tell, this is impossible. Each entity gets its own Insert call, but there's no way you can just insert the one entity because without IDs the associations are lost. If the database used GUID identifiers it would be a different story because I could set those on the client. Is this possible, or should I be pursuing another design?

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• Using Git with shared (symbolic link) directories

  - by chmike

  I'm working on a big Qt application with multiple widgets which are quite complex. One of this widget is a webcam stream viewer. The application is organized so that each program module (i.e. widgets) is stored in its own directory with a .pri file. All these are stored in one main directory grouping all the widget directories. Next to this main project directory I also have application directories. Let say one for each widget. In these directory I have a symbolic link (alias on windows) to the module directory in the main project folder. This application has then the necessary code to build a standalone application showing only the widget. So for instance I have a webcam viewer application, another to control some devices, etc. This source code organization works well and allows me to develop and test the widgets in independent applications while sharing the code with the main application. Currently only the main project directory is under version control using subversion. Now I would like to start using git and would like to know if this shared directory model would work with it or if there is a better way to do it.

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• Delphi: Alternative to using Assign/ReadLn for text file reading

  - by Ian Boyd

  i want to process a text file line by line. In the olden days i loaded the file into a StringList: slFile := TStringList.Create(); slFile.LoadFromFile(filename); for i := 0 to slFile.Count-1 do begin oneLine := slFile.Strings[i]; //process the line end; Problem with that is once the file gets to be a few hundred megabytes, i have to allocate a huge chunk of memory; when really i only need enough memory to hold one line at a time. (Plus, you can't really indicate progress when you the system is locked up loading the file in step 1). The i tried using the native, and recommended, file I/O routines provided by Delphi: var f: TextFile; begin Assign(filename, f); while ReadLn(f, oneLine) do begin //process the line end; Problem withAssign is that there is no option to read the file without locking (i.e. fmShareDenyNone). The former stringlist example doesn't support no-lock either, unless you change it to LoadFromStream: slFile := TStringList.Create; stream := TFileStream.Create(filename, fmOpenRead or fmShareDenyNone); slFile.LoadFromStream(stream); stream.Free; for i := 0 to slFile.Count-1 do begin oneLine := slFile.Strings[i]; //process the line end; So now even though i've gained no locks being held, i'm back to loading the entire file into memory. Is there some alternative to Assign/ReadLn, where i can read a file line-by-line, without taking a sharing lock? i'd rather not get directly into Win32 CreateFile/ReadFile, and having to deal with allocating buffers and detecting CR, LF, CRLF's. i thought about memory mapped files, but there's the difficulty if the entire file doesn't fit (map) into virtual memory, and having to maps views (pieces) of the file at a time. Starts to get ugly. i just want Assign with fmShareDenyNone!

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• ASP.NET Membership

  - by Gary McGill

  I'd like to use the ASP.NET membership provider in the following (low-security) scenario... My company will create and administer user accounts on behalf of our clients. These accounts will likely be shared amongst several people in the client company (is that a problem?). There will be 2 types of users (2 roles): client and administrator. Administrators are the people within my company that will have special privileges to create client user accounts, etc. Clients will not be able to self-register. They also won't get to choose their own password, and they should not be able to change their password either, since that will just create confusion where several people are sharing the same account. My internal users (admins) will set the password for each client. Here's the bit I'm struggling with: if a client phones up and asks to be reminded of their password, how can my admin users find out what the password is? Can I configure the provider to store the password in clear text (or other recoverable form), and if so can I get at the password through the .NET API? As I said at the outset, this is a low-security application, and so I plan simply to show the password in the (internal) web page where I have a list of all users.

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• fixed layout in formview template

  - by Jeroen

  I have n pages with formviews, all sharing a similar layout inside their item/edit/insert templates. For example all item and edit templates have a header and body part inside where i put the fields. The header has a certain style and the body part too. My question is how can i enforce this style in all my formviews without repeating the same bulk css styles all the time. Now i'm using masterpages for this with multiple formviews on 1 page. That's not good i think. I want one 1 page for edit/insert/item and 1 formview. I would prefer somehow to define the style for edit template once and load it into every formview. Ofcourse not all the formviews have the same fields, so like masterpages i would like to have 'areas' where i can put my fields. The perfect way i suppose would be to have a formview span a complete masterpage based page including the contentplaceholders inside it's edit/insert/item templates. Any ideas are more than welcome. Edit: I read it's possible in .Net 4 using dynamic data. I'm stuck with 3.5 for the moment.

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• Not all TFS Build type files are getting copied

  - by k4k4sh1

  Because I have several builds sharing some assemblies containing common build tasks, I have one TFSBuild.proj for all builds and import different targets depending on the build, like the following: <Project DefaultTargets="DesktopBuild" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5"> <Import Project="Build_1.targets" Condition="'$(BuildDefinition)'=='Build_1'" /> <Import Project="Build_2.targets" Condition="'$(BuildDefinition)'=='Build_2'" /> <Import Project="Build_3.targets" Condition="'$(BuildDefinition)'=='Build_3'" /> </Project> Each target for a particular build has your usual content for a build type file, but in my case, I also reference some tasks inside assemblies checked into the same folder as TFSBuild.proj in source control. I wanted to add folders to contain some test build targets, since my folder was getting a bit full and cluttered. The following illustrates what I mean. $(TFS project)\build\ TFSBuild.proj Build_1.targets ... Assembly1.dll Assembly2.dll ... Folder\ Test_target_1.targets .... When I stated my build, however, I found that Test_target_1.targets and other files in Folder were not being copied to the build directory, while TFSBuild.proj and other files in the root level, as it were, of the build type folder were being copied. This caused my test build to not be able to reference files inside Folder, causing my build to immediately fail. I realize the simplest work-around would be to get rid of Folder and move all of its contents up to the build folder, but I would really like to have Folder if at all possible. Thanks for your help in advance.

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• How do I connect to a Java command-line tool with the YourKit Java Profiler?

  - by Daryl Spitzer

  I've build a command-line tool in Java, which I would now like to profile with YourKit. I launch the command-line tool with something like: $ java -classpath .:foo.bar.jar com.foobar.tools.TheTool arg1 arg2 arg3 It runs to completion in less than 2 seconds. After reading http://www.yourkit.com/docs/80/help/agent.jsp, I tried the following: $ java -agentpath:/home/dspitzer/yjp-8.0.24/bin/linux-x86-32/libyjpagent.so -classpath .:foo.bar.jar com.foobar.tools.TheTool arg1 arg2 arg3 ...and I get: [YourKit Java Profiler 8.0.24] JVMTI version 3001016d; 14.3-b01; Sun Microsystems Inc.; mixed mode, sharing; Linux; 32-bit JVM [YourKit Java Profiler 8.0.24] Profiler agent is listening on port 10001... [YourKit Java Profiler 8.0.24] *** HINT ***: To get profiling results, connect to the application from the profiler UI ... But I guess YourKit is designed to only connect to running application. How should I modify my command-line tool to allow connection from YourKit? I could add a command-line option that will have it pause for input, and I won't press return for it to continue until I've connected to it from YourKit. Is there a YourKit API that I could add to my tool that would cause it to block until I've connected with YourKit? Is there a YourKit API or a java command-line option that would create a profiling "snapshot" that I could load and analyze later (after the command-line tool has completed) with YourKit?

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