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• Why no Win16 support in 64-bit Windows?

  - by dsimcha

  My understanding (from Wikipedia) is that the x64 instruction set supports executing 16-bit protected mode code from long mode, but cannot execute real mode code without being switched out of long mode because long mode lacks virtual 8086 mode. Therefore, it stands to reason that real mode DOS apps can't be run in Win64 w/o software emulation or dynamic translation. However, why was support for Win16 protected-mode apps excluded when support for them seems (at least at first glance) to be reasonably implementable and is included in newer versions of Win32? Was it just a matter of demand not being high enough to justify implementation costs (and the win32 version was already implemented), or is there a good technical reason?

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• Should a MobiTex service with a highly resilient website offer content over WAP?

  - by makerofthings7

  I'm trying to offer services over the MobiTex network (also see wiki) and want to reduce double-work. I'm trying to understand if it is a good idea to WAP enable my website. Given that WAP usage is increasing (since MMS is a hybrid of SMS + WAP), and the FCC has required every operator in the 700Mhz range to implement it I'd like to fully understand if there are benefits to the technology for certain critical applications. For example, if GPRS allows SMS traffic, voice, and Data, presumably they are handled by different Gateways. If there is another gateway for WAP traffic I would think that it would act as a backup if the data gateway was overloaded. Are there resiliency benefits to using WAP on a critical website? i.e. Content delivery (push or pull)

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• Career advice: I am best at what I hate most

  - by flybywire

  I think my career has entered a vicious circle which I would like to exit: I am best at what I hate most. And because I am good at that, I always receive that kind of assignments, and I do them as expected or even better. Which makes me more of an expert and brings me more similar tasks. My "expertise" is what (I think) every programmer hates: legacy systems. I can very quickly learn systems, and modify them, migrate them, extract web services from them whatever (without breaking them). Never to develop more functionality or to solve interesting or original problems. Just have that work with Java 1.4, or convert it into a rest-full service or support oracle too. I feel (and I am told) that I am highly regarded and very helpful to my company. But I hate what I do. What would you do in my place?

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• Is there any way to use getaddrinfo() and freeaddrinfo() and still be the program compatible with le

  - by Sam C.

  Hi, in the Winsock2 library getaddrinfo() and freeaddrinfo() was only added in Windows XP and on. I know how to replace them in legacy systems, but a conditional use depending on the Windows version won't help. The application won't start in 9x with a message saying that it was linked to a missing export in WS2_32.dll. I'm using MinGW to compile and link the code and would like to keep using it. Maybe writing those functions by myself? Thank you very much for everything.

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• Delete or comment out non-working JUnit tests?

  - by Chris Knight

  I'm currently building a CI build script for a legacy application. There are sporadic JUnit tests available and I will be integrating a JUnit execution of all tests into the CI build. However, I'm wondering what to do with the 100'ish failures I'm encountering in the non-maintained JUnit tests. Do I: 1) Comment them out as they appear to have reasonable, if unmaintained, business logic in them in the hopes that someone eventually uncomments them and fixes them 2) Delete them as its unlikely that anyone will fix them and the commented out code will only be ignored or be clutter for evermore 3) Track down those who have left this mess in my hands and whack them over the heads with the printouts of the code (which due to long-method smell will be sufficently suited to the task) while preaching the benefits of a well maintained and unit tested code base

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• Can a CWinApp be placed in a DLL?

  - by jmucchiello

  I'm updating some legacy apps to Visual Studio 10 and am in linker hell. All of these DLLs derive classes from CWinApp and use AfxGetApp() to get access to the object. When I link the DLLs I get unresolved externals that look like global static objects that would get pulled in by a normal app's main(): Shell.lib(SHELL.obj) : error LNK2001: unresolved external symbol "public: static struct CRuntimeClass const CException::classCException" (?classCException@CException@@2UCRuntimeClass@@B) Shell.lib(SHELL.obj) : error LNK2001: unresolved external symbol "public: static struct CRuntimeClass const CFrameWnd::classCFrameWnd" (?classCFrameWnd@CFrameWnd@@2UCRuntimeClass@@B) Shell.lib(SHELL.obj) : error LNK2001: unresolved external symbol "public: static class CRect const CFrameWnd::rectDefault" (?rectDefault@CFrameWnd@@2VCRect@@B) My current combination of ignore default libraries and additional libraries (the method you can easily google to find the answer to linker hell) is: msvcprtd.lib,mfc100d.lib,mfcs100d.lib,libcmtd.lib When I add nafxcwd.lib (the mfc library), these three external symbols resolve but I end up with a bunch of other duplicate symbols (requiring the use of /FORCE:MULTIPLE) and in end __argc and __argv become unresolved. So the basic question is: Can you link a DLL containing a CWinApp in VS10? How do you setup the linker to do it?

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• How can I sell a legacy program rewrite to the business?

  - by Wil

  We have a legacy classic ASP application that's been around since 2001. It badly needs to be re-written, but it's working fine from an end user perspective. The reason I feel like a rewrite is necessary is that when we need to update it (which is admittedly not that often) then it takes forever to go through all the spaghetti code and fix problems. Also, adding new features is also a pain since it was architect-ed and coded badly. I've run cost analysis for them on maintenance but they are willing to spend more for the small maintenance jobs than a rewrite. Any suggestions on convincing them otherwise?

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• Is it possible to share a masterpage between MVC and webforms?

  - by Craig Quillen

  I am adding MVC to a project that has MANY legacy webform pages. This works fine. However, I currently have a separate masterpage for MVC and for the webforms. The two master pages produce essentially identical output. I'd really like to kill the webforms one and just use the MVC master page with all my pages and stay DRY. Not being DRY has already bitten me a couple times when I forgot to change both. I tried doing the obvious way and just pointing the webform content page's MasterPage attribute at the MVC masterpage. This throws an error saying the MVC masters only work with MVC views. This seems like it would be a pretty common problem with mixed MVC and webform projects. My MVC master isn't doing anything with ViewData, so I don't see any reason the webforms couldn't use them.

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• Do you know of a bleeding-edge HTML5 leveraging, legacy-ignoring JavaScript framework?

  - by Ivan

  What's the best framework (sort of jquery, extjs, etc like) to use if I'd like to intensively use all the freshest technologies of the HTML5 stack provided by modern browsers (Firefox 3.6+ (Minefield especially), Safari 4+, Chrome 4+) and have absolutely no need to support any legacy browsers (incl. no need in IE support at all, no need in Firefox prior to 3.5, etc.)? I'd like to get all the newest available goodness without having (even abstracted by a library layer) a line of code meant just fore legacy compatibility and keeping no legacy-induced things in mind. To soften the filter, taking very humble hope of such an ideally fresh framework to exist, the least (the maximum level of legacy support) I'd like to agree is not supporting IE versions older than IE8, or better just not supporting IE at all.

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• How should I handle using two databases with a legacy PHP application?

  - by Toby Allen

  I have a legacy PHP application that was written in 2004 and uses MSSQL as a database backend. At this stage MSSQL is still supported by PHP but only just via a Microsoft driver. I have looked at converting to mysql via automated tools, which work quite well, but I have quite complex views which need a lot of individual work to convert. I don't have a great deal of time to do this. Many tools I wish to use and frameworks I would like to move the application to, don't support MSSQL, so I was considering adding new features using a new mysql database and wondered if anyone had opinions on the pros and cons of using two seperate database backends in a single application?

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• Qu'est qui ne va plus avec Subversion ? Le système de gestion de versions est de plus en plus décrié et remplacé par d'autres outils

  Qu'est qui ne va plus avec Subversion ? De plus en plus décrié et remplacé par d'autres systèmes de gestion de versions Tout comme PHP, Subversion est en perte de vitesse ou en tout cas en perte rapide de popularité au profit d'autres systèmes de gestion de versions jugés plus dans l'air du temps, comme Git, Mercurial ou encore Perforce. De plus en plus de développeurs l'abandonnent. Les plus blogueurs d'entre n'hésitent souvent pas à expliquer les raisons de leur infidélité dans des billets qui ...

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• How do you map a composite id to a composite user type with Fluent NHibernate?

  - by gabe

  i'm working w/ a legacy database is set-up stupidly with an index composed of a char id column and two char columns which make up a date and time, respectively. I have created a icompositeusertype for the date and time columns to map to a single .NET DateTime property on my entity, which works by itself when not part of the id. i need to somehow use a composite id with key property mapping that includes my icompositeusertype for mapping to the two char date and time columns. Apparently w/ my version of Fluent NHibernate, CompositeIdentityPart doesn't have a CustomTypeIs() method, so i can't just do the following in my override: mapping.UseCompositeId() .WithKeyProperty(x => x.Id, CommonDatabaseFieldNames.Id) .WithKeyProperty(x => x.FileCreationDateTime) .CustomTypeIs<FileCreationDateTimeType>(); is something like this even possible w/ NHibernate let alone Fluent? I haven't been able to find anything on this.

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• What are the effects of using VS2005 to migrate from .NET 1.1

  - by andy

  Hey guys, I'm working on some legacy code for a client, involving Microsoft Content Management System (MCMS). Currently, everything is local, the code, MCMS, SQLServer, and IIS (5.x). I copied the project folder, and then opened the new copied solution in VS2005, and let it do it's conversion thing. But now nothing works. I've nnotice there have been some changes to IIS profile. What are the extent of these changes...?? Also, my VS2003 fails to recognize the Web Project?? Anyone have any idea what's going on? cheers!

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• PRISM : la NSA met sur pied de nouveaux systèmes de sécurité informatique pour surveiller les administrateurs système

  Le projet PRISM autorise les fédéraux américains à fouiller nos données stockées en ligne un ancien employé aux renseignements le dévoileSe basant sur des fuites d'un ancien employé au renseignement américain, l'éditorial américain Washington Post a révélé que l'agence de sécurité nationale américaine (NSA) et le FBI avaient accès aux bases de données de neuf poids lourds sur internet, parmi lesquels Facebook, Google ou même encore plus récemment Apple. Le projet, au nom de code PRISM, mis en place depuis 2007, permet aux deux agences de fouiller les données clients de ces entreprises sans aucune ordonnance préalable de la justice.

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• How do I do a B43 Legacy install on Ubuntu 11.10?

  - by Gozzy

  I recently installed ubuntu onto an extra hard drive and everything booted correctly. However, my Linksys wireless card is not working. I went though all the forums and walk throughs and I know that I need to install the b43 legacy firmware to get the card to work. When I try to install the files, I keep getting the message in Terminal saying "No such file or directory" for every file i need to run. It's Ubuntu 11.10 on a dell optiplex gx280. Also, the "pool" file that is supposed to be on the file system is not there

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• Ne dites plus iPhone OS 4, mais iOS 4 : le nouveau système d'exploitation pour terminaux mobiles d'A

  Comme on vous l'avait annoncé précédemment, Apple avait invité certains journalistes pour leur présenter certaines nouveautés de l'iPhone OS 4.0. Voici un tout petit résumé des nouveautés introduites dans iPhone OS 4.0 : 1500 nouvelles API à disposition des développeurs 100 nouvelles fonctionnalités proposées aux utilisateurs Parmi les nouvelles fonctionnalités proposées aux utilisateurs, Apple a mis l'accent sur 7 nouvelles fonctionnalités : Le multi-tache, mais de façon limitée (on reviendra là dessus plus tard) Les dossiers : vous pouvez maintenant avoir plus de 2000 applications réparties dans les dossiers. Au lieu de 180 auparavant. iBooks disponible également sur l'iPhone. Messagerie un...

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• Firefox OS : une nouvelle vidéo montre les avancées du projet de système d'exploitation mobile "ouvert" de Mozilla en HTML5

  Le projet de « Smartphone Open Web » de plus en plus soutenu Mozilla veut prouver la puissance du HTML 5 et en faire une technologie de développement natif pour mobiles Le projet de smartphone « ouvert » de Mozilla semble trouver de plus en plus de soutiens au sein de l'industrie mobile. De là à dire qu'il sera un succès, il y a une étape qui n'est pas encore franchie, mais le Mobile World Congress (MWC) de Barcelone reste prometteur pour la fondation. Première bonne nouvelle pour Mozilla, à l'occasion d'une conférence de presse conjointe, l'opérateur espagnol Telefónica a dévoilé son intention de commercialiser dès 2012 les tous premiers appareils « Open Web ». Il s'agit, en cla...

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• Delphi - E2010 Incompatible types: 'Integer' and 'Char' - Any ideas

  - by zeencat

  I've been tasked with porting a legacy Delphi application over to C# .Net. The original delphi developer left several months before I was hired. I'm receiving the E2010 Incompatible types: 'Integer' and 'Char' error for the below method. I'm trying to compile the application within the Delphi 2007 IDE, I've been told that original application is either Delphi 4 or 5 if that helps any. I understand what the error is telling me but I don't understand why\how it is applied to the code snippet below. Any help\direction would be greatly appreciated. Thanks in advance function StrIComp_JOH_PAS_1(const Str1, Str2: PChar): Integer; var Ch1, Ch2 : Char; Offset : Integer; PStr : PChar; begin; PStr := Str1; Offset := Str2 - PStr; repeat Ch1 := Upper[PStr^]; Ch2 := Upper[PStr[Offset]]; if (Ch1 = #0) or (Ch1 <> Ch2) then Break; Inc(PStr); until False; Result := Integer(Ch1) - Integer(Ch2); end;

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• Method for finding memory leak in large Java heap dumps

  - by Rickard von Essen

  I have to find a memory leak in a Java application. I have some experience with this but would like advice on a methodology/strategy for this. Any reference and advice is welcome. About our situation: Heap dumps are larger than 1 GB We have heap dumps from 5 occasions. We don't have any test case to provoke this. It only happens in the (massive) system test environment after at least a weeks usage. The system is built on a internally developed legacy framework with so many design flaws that they are impossible to count them all. Nobody understands the framework in depth. It has been transfered to one guy in India who barely keeps up with answering e-mails. We have done snapshot heap dumps over time and concluded that there is not a single component increasing over time. It is everything that grows slowly. The above points us in the direction that it is the frameworks homegrown ORM system that increases its usage without limits. (This system maps objects to files?! So not really a ORM) Question: What is the methodology that helped you succeed with hunting down leaks in a enterprise scale application?

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• How to access SQL CE 3.5 from VB6

  - by Masterfu

  We have a .NET 3.5 SP1 application written in C# that stores data in an SQL CE 3.5 Database. We also need to access (read only) this very data from a legacy VB6 application. I don't know if this is at all possible. There are several approaches to this problem that I can think of. 1) I have read about ADOCE Connections, but this seems to be an option for embedded Visual Basic only 2) I can't seem to get a connection working using ADODB.Connection Objects like so Dim MyConnObj As New ADODB.Connection ' Microsoft.SQLSERVER.CE.OLEDB.3.5 ' Microsoft.SQLSERVER.MOBILE.OLEDB.3.0 MyConnObj.ConnectionString = "Provider=SQLOLEDB;Data Source=c:\test.sdf" MyConnObj.Open Maybe this is just a bad choice of providers? I also tried the providers that appear as comments above and different connection strings, but to no avail. Both providers are not installed on my dev machine and won't be installed on my customer's machine. 3) Maybe there is a way to use a more generic approach like ODBC? But I believe this would result in setup / deployment work, right? Does anyone have any experience with this scenario? As you can see, I am really looking for some good starting points. I also accept answers like "This is drop dead simple and so are you" as long as they come with some guiding directions ;-)

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• How to (unit-)test data intensive PL/SQL application

  - by doom2.wad

  Our team is willing to unit-test a new code written under a running project extending an existing huge Oracle system. The system is written solely in PL/SQL, consists of thousands of tables, hundreds of stored procedures packages, mostly getting data from tables and/or inserting/updating other data. Our extension is not an exception. Most functions return data from a quite complex SELECT statementa over many mutually bound tables (with a little added logic before returning them) or make transformation from one complicated data structure to another (complicated in another way). What is the best approach to unit-test such code? There are no unit tests for existing code base. To make things worse, only packages, triggers and views are source-controlled, table structures (including "alter table" stuff and necessary data transformations are deployed via channel other than version control). There is no way to change this within our project's scope. Maintaining testing data set seems to be impossible since there is new code deployed to the production environment on weekly basis, usually without prior notice, often changing data structure (add a column here, remove one there). I'd be glad for any suggestion or reference to help us. Some team members tend to be tired by figuring out how to even start for our experience with unit-testing does not cover PL/SQL data intensive legacy systems (only those "from-the-book" greenfield Java projects).

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• Seeking suggestions on redesigning the interface

  - by ratkok

  As a part of maintaining large piece of legacy code, we need to change part of the design mainly to make it more testable (unit testing). One of the issues we need to resolve is the existing interface between components. The interface between two components is a class that contains static methods only. Simplified example: class ABInterface { static methodA(); static methodB(); ... static methodZ(); }; The interface is used by component A so that different methods can use ABInterface::methodA() in order to prepare some input data and then invoke appropriate functions within component B. Now we are trying to redesign this interface for various reasons: Extending our unit test coverage - we need to resolve this dependency between the components and stubs/mocks are to be introduced The interface between these components diverged from the original design (ie. a lots of newer functions, used for the inter-component i/f are created outside this interface class). The code is old, changed a lot over the time and needs to be refactored. The change should not be disruptive for the rest of the system. We try to limit leaving many test-required artifacts in the production code. Performance is very important and should be no (or very minimal) degradation after the redesign. Code is OO in C++. I am looking for some ideas what approach to take. Any suggestions on how to do this efficiently?

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• Being pressured to GOTO the dark-side

  - by Dan McG

  We have a situation at work where developers working on a legacy (core) system are being pressured into using GOTO statements when adding new features into existing code that is already infected with spagetti code. Now, I understand there may be arguments for using 'just one little GOTO' instead of spending the time on refactoring to a more maintainable solution. The issue is, this isolated 'just one little GOTO' isn't so isolated. At least once every week or so there is a new 'one little GOTO' to add. This codebase is already a horror to work with due to code dating back to or before 1984 being riddled with GOTOs that would make many Pastafarians believe it was inspired by the Flying Spagetti Monster itself. Unfortunately the language this is written in doesn't have any ready made refactoring tools, so it makes it harder to push the 'Refactor to increase productivity later' because short-term wins are the only wins paid attention to here... Has anyone else experienced this issue whereby everybody agrees that we cannot be adding new GOTOs to jump 2000 lines to a random section, but continually have Anaylsts insist on doing it just this one time and having management approve it? tldr; How can one go about addressing the issue of developers being pressured (forced) to continually add GOTO statements (by add, I mean add to jump to random sections many lines away) because it 'gets that feature in quicker'? I'm beginning to fear we may loses valuable developers to the raptors over this...

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• In the Aggregate: How Will We Maintain Legacy Systems?

  - by Jim G.

  NEW YORK - With a blast that made skyscrapers tremble, an 83-year-old steam pipe sent a powerful message that the miles of tubes, wires and iron beneath New York and other U.S. cities are getting older and could become dangerously unstable. July 2007 Story About a Burst Steam Pipe in Manhattan We've heard about software rot and technical debt. And we've heard from the likes of: "Uncle Bob" Martin - Who warned us about "the consequences of making a mess". Michael C. Feathers - Who gave us guidance for 'Working Effectively With Legacy Code'. So certainly the software engineering community is aware of these issues. But I feel like our aggregate society does not appreciate how these issues can plague working systems and applications. As Steve McConnell notes: ...Unlike financial debt, technical debt is much less visible, and so people have an easier time ignoring it. If this is true, and I believe that it is, then I fear that governments and businesses may defer regular maintenance and fortification against hackers until it is too late. [Much like NYC and the steam pipes.] My Question: Do you share my concern? And if so, is there a way that we can avoid the software equivalent of NYC and the steam pipes?

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• How to make a legacy system time-zone sensitive?

  - by Jerry Dodge

  I need to implement time zones in a very large and old Delphi system, where there's a central SQL Server database and possibly hundreds of client installations around the world in different time zones. The application already interacts with the database by only using the date/time of the database server. So, all the time stamps saved in both the database and on the client machines are the date/time of the database server when it happened, never the time of the client machine. So, when a client is about to display the date/time of something (such as a transaction) which is coming from this database, it needs to show the date/time converted to the local time zone. This is where I get lost. I would naturally assume there should be something in SQL to recognize the time zone and convert a DateTime field dynamically. I'm not sure if such a thing exists though. If so, that would be perfect, but if not, I need to figure out another way. This Delphi system (multiple projects) utilizes the SQL Server database using ADO components, VCL data-aware controls, and QuickReports (using data sources). So, there's many places where the data goes directly from the database query to rendering on the screen, without any code to actually put this data on the screen. In the end, I need to know when and how should I get the properly converted time? What is the proper way to ensure that I handle Dates and Times correctly in a legacy application?

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