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• Exposing business logic as WCF service

  - by Oren Schwartz

  I'm working on a middle-tier project which encapsulates the business logic (uses a DAL layer, and serves a web application server [ASP.net]) of a product deployed in a LAN. The BL serves as a bunch of services and data objects that are invoked upon user action. At present times, the DAL acts as a separate application whereas the BL uses it, but is consumed by the web application as a DLL. Both the DAL and the web application are deployed on different servers inside organization, and since the BL DLL is consumed by the web application, it resides in the same server. The worst thing about exposing the BL as a DLL is that we lost track with what we expose. Deployment is not such a big issue since mostly, product versions are deployed together. Would you recommend migrating from DLL to WCF service? If so, why? Do you know anyone who had a similar experience?

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• Questions about Microsoft's new Cloud certification

  - by makerofthings7

  I'm evaluating taking the cloud certification exams from Microsoft, and have a few questions How highly do you think employers will value this exam? What job roles would require this cert? In your personal experience, how would this certification be weighed against other factors such as real world experience, other certifications, and having a Bachelors degree? If you mention that other certifications are more valued, which ones are they?

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• Windows Phone 8 development on Windows 7 - is it or will be possible?

  - by Tiby

  I was trying to install Windows Phone 8 SDK on my Windows 7 machine and it hit me with the 'supported only on Windows 8' message. I actually wanted to develop Phone 7.5 apps on Visual Studio 2012, impossible thing with the 7.1 SDK, so I thought 8 SDK will do the job. As if it was not enough that the 8 SDK was controversial upon release, now that it's generally available, to me it seems like a horrible decision to make it available only for Windows 8, because in my humble opinion, no serious and sane developer will install Windows 8 ever, or at least in the near future, just because of the Metro UI. So, anyone knows any workarounds for developing Windows Phone 8 on Windows 7, or at least develop for 7.5 but using Visual Studio 2012?

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• Submitting Java Code with Junit unit test

  - by LivingThing

  I have mostly work on simple java programs and compiled and run it with eclipse on Windows. So, i have no experience of using command prompt for compiling Java projects and do not have much info about what actually happens beneath the play button in Eclipse. Now i have to submit a Java application which will have basic operation on XML. My project also will have (JUnit) Unit Test. My question is related to submission of this Project. Which files would be necessary to submit the code. So, it executes properly? Does chosing eclipse as an IDE or junit as a unit testing framweork produces any dependenices i.e the executor of the program should have eclipse/libraries to execute the program on his machine?

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• Java HttpURLConnection class Program

  - by pandu

  I am learning java. Here is the sample code of HttpURLConnection class usage in some text book import java.net.*; import java.io.*; import java.util.*; class HttpURLDemo { public static void main(String args[]) throws Exception { URL hp = new URL("http://www.google.com"); HttpURLConnection hpCon = (HttpURLConnection) hp.openConnection(); // Display request method. System.out.println("Request method is " + hpCon.getRequestMethod()); // Display response code. System.out.println("Response code is " + hpCon.getResponseCode()); // Display response message. System.out.println("Response Message is " + hpCon.getResponseMessage()); // Get a list of the header fields and a set // of the header keys. Map<String, List<String>> hdrMap = hpCon.getHeaderFields(); Set<String> hdrField = hdrMap.keySet(); System.out.println("\nHere is the header:"); // Display all header keys and values. for(String k : hdrField) { System.out.println("Key: " + k + " Value: " + hdrMap.get(k)); } } } Question is Why hpCon Object is declared in the following way? HttpURLConnection hpCon = (HttpURLConnection) hp.openConnection(); instead of declaring like this HttpURLConnection hpCon = new HttpURLConnection(); Author provided the following explanation. I cant understand Java provides a subclass of URLConnection that provides support for HTTP connections. This class is called HttpURLConnection. You obtain an HttpURLConnection in the same way just shown, by calling openConnection( ) on a URL object, but you must cast the result to HttpURLConnection. (Of course, you must make sure that you are actually opening an HTTP connection.) Once you have obtained a reference to an HttpURLConnection object, you can use any of the methods inherited from URLConnection

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• Dapper and object validation/business rules enforcement

  - by Eugene

  This isn't really Dapper-specific, actually, as it relates to any XML-serializeable object.. but it came up when I was storing an object using Dapper. Anyways, say I have a user class. Normally, I'd do something like this: class User { public string SIN {get; private set;} public string DisplayName {get;set;} public User(string sin) { if (string.IsNullOrWhiteSpace(sin)) throw new ArgumentException("SIN must be specified"); this.SIN = sin; } } Since a SIN is required, I'd just create a constructor with a sin parameter, and make it read-only. However, with a Dapper (and probably any other ORM), I need to provide a parameterless constructor, and make all properties writeable. So now I have this: class User: IValidatableObject { public int Id { get; set; } public string SIN { get; set; } public string DisplayName { get; set; } public IEnumerable<ValidationResult> Validate(ValidationContext validationContext) { // implementation } } This seems.. can't really pick the word, a bad smell? A) I'm allowing to change properties that should not be changed ever after an object has been created (SIN, userid) B) Now I have to implement IValidatableObject or something like that to test those properties before updating them to db. So how do you go about it ?

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• Java - learning / migrating fast

  - by Yippie-Kai-Yay

  This is not one of those questions like "How do I learn Java extremely fast, I know nothing about programming, but I heard Java is cool, yo". I have an interview for a Java Software Developer in a couple of weeks and the thing is that I think that I know C++ really good and I am somewhat good at C# (like, here I can probably answer on a lot of questions related to these languages), but I have almost zero experience with Java. I have a lot of projects written in both languages, I participiated in several open-source projects (mostly C++, though). Now, what should I do (in your opinion) to prepare myself for this Java interview. I guess migrating from C# to Java should be kind of fast, especially when you know a lot about programming in global, patterns, modern techniques and have a lot of practical experience behind you. But still two weeks is obviously not enough to get Java in-depth - so what should I focus on to have the best chances to pass the interview? Thank you.

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• Code Style - Do you prefer to return from a function early or just use an IF statement?

  - by Rachel

  I've often written this sort of function in both formats, and I was wondering if one format is preferred over another, and why. public void SomeFunction(bool someCondition) { if (someCondition) { // Do Something } } or public void SomeFunction(bool someCondition) { if (!someCondition) return; // Do Something } I usually code with the first one since that is the way my brain works while coding, although I think I prefer the 2nd one since it takes care of any error handling right away and I find it easier to read

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• I'm 15 years old. What would you recommend for resources?

  - by JacKeown

  Hi. I'm a 15 year old kid who seems to excel in all of his classes, likes talking in 3rd person, and wants to learn more about programming and a little about html/php stuff. I already know a little python and I'm hoping to eventually learn Java/Javascript and C. I've been looking around and I've found some online lectures like this and some other tutorials that are so mind numbingly boring and difficult to understand...I was wondering if any of you knew of any good books or other resources that would actually teach me everything I'd need to know incrementally... Thanks in advance!

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• Compatibility of Enum Vs. string constants

  - by Yosi

  I was recently told that using Enum: public enum TaskEndState { Error, Completed, Running } may have compatibility/serialization issues, and thus sometimes it's better to use const string: public const string TASK_END_STATE = "END_STATE"; public const string TASK_END_STATE_ERROR = "TASK_END_STATE_ERROR"; public const string TASK_END_STATE_COMPLETE = "TASK_END_STATE_COMPLETE"; public const string TASK_END_STATE_RUNNING = "TASK_END_STATE_RUNNING"; Can you find practical use case where it may happen, is there any guidelines where Enum's should be avoided? Edit: My production environment has multiple WFC services (different versions of the same product). A later version may/or may not include some new properties as Task end state (this is just an example). If we try to deserialize a new Enum value in an older version of a specific service, it may not work.

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• How to document/verify consistent layering?

  - by Morten

  I have recently moved to the dark side: I am now a CUSTOMER of software development -- mainly websites. With this new role comes new concerns. As a programmer i know how solid an application becomes when it is properly layered, and I want to use this knowledge in my new job. I don't want business logic in my presentation layer, and certainly not presentation stuff in my data layer. Thus, I want to be able to demand from my supllier that they document the level of layering, and how neat and consistent the layering is. The big question is: How is the level of layering documented to me as a customer, and is that a reasonable demmand for me to have, so I don't have to look in the code (I'm not supposed to do that anymore)?

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• Thoughts of Cloud Development/Google App Engine

  - by jiewmeng

  I use mainly PHP for web development, but recently, I started thinking about using Google App Engine. It doesn't use PHP which I am already familiar with, so there will be a steeper learning curve. Probably using Python/Django. But I think it maybe worthwhile. Some advantages I see: Focus on App/Development. No need to setup/maintain server ... no more server configs Scales automatically Pay for what you use. Free for low usage Reliable, it's Google after all Some concerns though: Does database with no joins pose a problem for those who used App Engine before? Do I have to upload to Google just to test? Will it be slow compared to testing locally? What are your thoughts and opinions? Why would you use or not use App Engine?

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• Test interface implementation

  - by Michael

  I have a interface in our code base that I would like to be able to mock out for unit testing. I am writing a test implementation to allow the individual tests to be able to override the specific methods they are concerned with rather than implementing every method. I've run into a quandary over how the test implementation should behave if the test fails to override a method used by the method under test. Should I return a "non-value" (0, null) in the test implementation or throw a UnsupportedOperationException to explicitly fail the test?

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• how do I write a functional specification quickly and efficiently

  - by giddy

  So I just read some fabulous articles by Joel on specs here. (Was written in 2000!!) I read all 4 parts, but Im looking for some methodical approaches to writing my specs. Im the only lonely dev, working on this fairly complicated app (or family of apps) for a very well known finance company. I've never made something this serious, I started out writing something like a bad spec, an overview of some sorts, and it has wasted a LOT of my time. Ive also made 3 mockup-kinda-thingies for my client so I have a good understanding of what they want. Also released a preview (a throw away working app with the most basic workflow), and Ive only written and tested some of the very core/base systems. I think the mistake Ive been making so far is not writing a detailed spec, so Im getting to it now. So the whole thing comprises of An MVC website (for admins & data viewing) 2 Silverlight modules (For 2 specific tasks) 1 Desktop Application Im totally short on time, resources and need to get this done quick, also, need to make sure these guys read it up equally quick and painlessly. So how do I go about it, Im looking for any tips, any real world stuff, how do you guys usually do it? Do you make a mock screenie of every dialog/form/page? Im thinking of making a dummy asp.net web forms project, then filling in html files in folders and making it look like my mvc url structure. Then having a section in the spec for the website and write up a page for every URL Ive got with a screenie. For my win forms app, Ive made somewhat of a demo Win Form project, would I then put in a dialog or stucture everything as I would in the real app and then screen shot it?

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• Data Storage Options

  - by Kenneth

  When I was working as a website designer/engineer I primarily used databases for storage of much of my dynamic data. It was very easy and convenient to use this method and seemed like a standard practice from my research on the matter. I'm now working on shifting away from websites and into desktop applications. What are the best practices for data storage for desktop applications? I ask because I have noticed that most programs I use on a personal level don't appear to use a database for data storage unless its embedded in the program. (I'm not thinking of an application like a word processor where it makes sense to have data stored in individual files as defined by the user. Rather I'm thinking of something more along the lines of a calendar application which would need to store dates and event info and such where accessing that information would be much easier if stored in a database... at least as far as my experience would indicate.) Thanks for the input!

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• How to ...set up new Java environment - largely interfaces...

  - by Chris Kimpton

  Hi, Looks like I need to setup a new Java environment for some interfaces we need to build. Say our system is X and we need to interfaces to systems A, B and C. Then we will be writing interfaces X-A, X-B, X-C. Our system has a bus within it, so the publishing on our side will be to the bus and the interface processes will be taking from the bus and mapping to the destination system. Its for a vendor based system - so most of the core code we can't touch. Currently thinking we will have several processes, one per interface we need to do. The question is how to structure things. Several of the APIs we need to work with are Java based. We could go EJB, but prefer to keep it simple, one process per interface, so that we can restart them individually. Similarly SOA seems overkill, although I am probably mixing my thoughts about implementations of it compared to the concepts behind it... Currently thinking that something Spring based is the way to go. In true, "leverage a new tech if possible"-style, I am thinking maybe we can shoe horn some jruby into this, perhaps to make the APIs more readable, perhaps event-machine-like and to make the interface code more business-friendly, perhaps even storing the mapping code in the DB, as ruby snippets that get mixed in... but thats an aside... So, any comments/thoughts on the Spring approach - anything more up-to-date/relevant these days. EDIT: Looking a JRuby further, I am tempted to write it fully in JRuby... in which case do we need any frameworks at all, perhaps some gems to make things clearer... Thanks in advance, Chris

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• displaying multi-section html documents - best practices

  - by ecpepper

  I work at a research organization and we publish a lot of large-ish documents, usually organized in sections. What I want to know is how best to present these multi-section documents on our website. Presently, what I do is load the entire document as a single page, with each section as its own div. Then I show and hide divs as needed via a table of contents and "next" and "prev" buttons. The advantages to this are mainly: 1) that you can move between sections very quickly, 2) it produces consistent analytics (when a page is loaded, I know a report is being read). The disadvantages, however, are real: Readers can't take advantage of browser back/forward buttons to move between sections. It's complicated to create direct links to individual sections (I can do it with javascript but it's not easy for other people to grab and share). For long reports, you have to wait for the full report to load before you can move around (and that can include hordes of images and charts). Do other people have thoughts on better ways to organize this? Here's an example of the current system: http://massbudget.org/825

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• Developing JSON API for a Carpool Engine

  - by Siddharth

  I am developing a new set of API methods for carpooling/cab booking, so if a developer needs to develop an app or webportal for carpooling, he can call my JSON API. Basically making it easy for developers. My API current has: AddVehicle AddJourney SearchJourney SubscribeToThisJourney(journey) SubscriberList(journey) to get list of people who have subscribed for this journey AcceptSubscription(subscriber) AcceptedSubcriberList SubscriberList to get list of providers I have subscribed to I need help with replacing subscriber with something else. It's difficult to remember, and confusing when you see 3 methods that mean very different things: SubscriberList, SubscribedToThisJourneyList and AcceptedSubscriberList. Confusing to remember. One is a list of who I have subscribed to Who has subscribed to me Whose subscription I have accepted How can I name these methods to make them easier to understand and remember?

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• Will LAMP meet the following needs?

  - by Telis Duvoir

  I remember a few years back, when I had a web-site I wanted to develop, that many people recommended I go the LAMP route. Unfortunately, I never got around to studying/practicing that. I'm currently revisiting the web-site idea. The web-site will be dynamic, transactional, and hopefully end up with around 1,000,000 pv/mo and 300,000 members within 18 months. Will LAMP adequately support a site like that (i.e. have you seen it under a site with those specs)?

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• Architecture for interfacing multiple applications

  - by Erwin

  Let's say you have a Master Database and a few External/Internal applications that use WebServices to interface data. What would be your preferred architecture to interface data from and to those applications? Would you put some sort of Enterprise Service Bus in between? Like BizTalk? Or something cheaper? We don't want to block applications while they are interfacing, but we do want to use return codes from the interfaces to determine if we need to take some actions in the originating application or not.

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• What are the drawbacks of Python?

  - by Rook

  Python seems all the rage these days, and not undeservingly - for it is truly a language with which one almost enjoys being given a new problem to solve. But, as a wise man once said (calling him a wise man only because I've no idea as to who actually said it; not sure whether he was that wise at all), to really know a language one does not only know its syntax, design, etc., advantages but also its drawbacks. No language is perfect, some are just better than others. So, what would be in your opinion, objective drawbacks of Python. Note: I'm not asking for a language comparison here (i.e. C# is better than Python because ... yadda yadda yadda) - more of an objective (to some level) opinion which language features are badly designed, whether, what are maybe some you're missing in it and so on. If must use another language as a comparison, but only to illustrate a point which would be hard to elaborate on otherwise (i.e. for ease of understanding)

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• HTML Parsing for multiple input files using java code [closed]

  - by mkp

  FileReader f0 = new FileReader("123.html"); StringBuilder sb = new StringBuilder(); BufferedReader br = new BufferedReader(f0); while((temp1=br.readLine())!=null) { sb.append(temp1); } String para = sb.toString().replaceAll("<br>","\n"); String textonly = Jsoup.parse(para).text(); System.out.println(textonly); FileWriter f1=new FileWriter("123.txt"); char buf1[] = new char[textonly.length()]; textonly.getChars(0,textonly.length(),buf1,0); for(i=0;i<buf1.length;i++) { if(buf1[i]=='\n') f1.write("\r\n"); f1.write(buf1[i]); } I've this code but it is taking only one file at a time. I want to select multiple files. I've 2000 files and I've given them numbering name from 1 to 2000 as "1.html". So I want to give for loop like for(i=1;i<=2000;i++) and after executing separate txt file should be generated.

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• Different database for Membership and our web data or use just one?

  - by Jesus Rodriguez

  Is better to keep our Membership stuff on the DefaultConnection and create another connection (another database) for our data? Or just one database for all? If I have a MyAppContext and I want migrations for that context, It seems that I cannot have migrations for UserContext (In other words, I can just migrate one context) So, having two different databases I can migrate or the users (maybe membership migration is weird) or the web data. Or, I can mix the UserContext and MyAppContext in one UserAndAppContext and migrate all in one place, but this mixing also seems weird. What's the normal way to do this, one or two databases and what should be migrated?

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• Five new junior developers and lots of complex tasks. What's now?

  - by mxe

  Our company has hired five new junior developers to help me to developer our product. Unfortunately the new features and incoming bug fixes usually require deeper knowledge than a recently graduated developer usually has (threading/concurrency, debugging performance bottlenecks in a complex system, etc.) Delegating (and planning) tasks which they (probably) can solve, answering their questions, mentoring/managing them, reviewing their code use up all of my time and I often feel that I could solve the issues less time than the whole delegating process takes (counting only my time). In addition I don't have time to solve the tasks which require deeper system knowledge/more advanced skills and it does not seem that it will change in the near future. So, what's now? What should I do to use their and my time effectively?

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• Django as Python extension?

  - by NoobDev4iPhone

  I come from php community and just started learning Python. I have to create server-side scripts that manipulate databases, files, and send emails. Some of it I found hard to do in python, comparing to php, like sending emails and querying databases. Where in php you have functions like mysql_query(), or email(), in python you have to write whole bunch of code. Recently I found Django, and my question is: is it a good framework for network-oriented scripts, instead of using it as a web-framework?

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