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  • Guidance for Web XML Api's

    - by qstarin
    I have to create an API for our application that is accessible over HTTP. I envision the API's responses to be simple XML documents. It won't be a REST API (not in the strict sense of REST). I am fairly new to this space - of course I've had to consume some Web API's in my work, but often they are already wrapped in language native libraries (i.e., TweetSharp). I'm looking for information to guide the design of an API. Are there any articles, blog posts, etc. that review and expound upon the design choices to be made in a Web API? Design choices would be things like how to authenticate, URL structure, when users submit should the URL they POST to determine the action being performed or should all requests go to a common URL and some part of the POST'd data is responsible for routing to a command, should all responses have the same document root or should errors have a different root, etc., etc. Ideally, such articles or blog posts would enumerate through the common variations for any given point of design and expound on the advantages and disadvantages, such that they would inform me to make my own decision (as opposed to articles that simply explain one single way to do something). Does anyone have any links or wisdom they can share?

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  • Telecomunication SID model and resources [on hold]

    - by andygluk
    There is a SID model well-known in telecom industry. Following this model you define resources as resources owned by your enterprise, and then you build resource-oriented services on top of it and then customer-oriented services and so on... So everything is based on enterprise-owned resources, which you have to identify first. What I am looking for and what I am asking is some alternative to this model, build not on enterprise-owned resources, but on resources sell by enterprise. Say, you are selling licenses for using your products. So instead of building model on top of enterprise resources you may be interested to build it on top of licenses you are selling.

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  • Technologie Roadmap: Portlet JSR286 vs Widget/Gadget

    - by Aerosteak
    Hello IBM got me confused (again). For many years IBM have been pushing for Portlet Containers with the JSR 168 and later the JSR 286 Specification. 2008-2009, IBM the Lotus division introduced the iWidget Specification. Based on my reading, it is a more dynamic and lightweight version of the Portlets, close to Google Gadget. It uses a different paradigm than Porlet while providing the same features. A major differentiator with this kind of client side technologies is that you don’t need a big and costly Portal infrastructure. To not fall in the ‘It depends on needs’ discussions, let consider the following: * New company, no legacy portlet, no portal in place. What are your thoughts on this?

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  • What is an effective git process for managing our central code library?

    - by Mathew Byrne
    Quick background: we're a small web agency (3-6 developers at any one time) developing small to medium sized Symfony 1.4 sites. We've used git for a year now, but most of our developers have preferred Subversion and aren't used to a distributed model. For the past 6 months we've put a lot of development time into a central Symfony plugin that powers our custom CMS. This plugin includes a number of features, helpers, base classes etc. that we use to build custom functionality. This plugin is stored in git, but branches wildly as the plugin is used in various products and is pulled from/pushed to constantly. The repository is usually used as a submodule within a major project. The problems we're starting to see now are a large number of Merge conflicts and backwards incompatible changes brought into the repository by developers adding custom functionality in the context of their own project. I've read Vincent Driessen's excellent git branching model and successfully used it for projects in the past, but it doesn't seem to quite apply well to our particular situation; we have a number of projects concurrently using the same core plugin while developing new features for it. What we need is a strategy that provides the following: A methodology for developing major features within the code repository. A way of migrating those features into other projects. A way of versioning the core repository, and of tracking which version each major project uses. A plan for migrating bug fixes back to older versions. A cleaner history that's easier to see where changes have come from. Any suggestions or discussion would be greatly appreciated.

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  • Pronunciation of "char"

    - by Zannjaminderson
    I know there's another question on here already about pronunciation here, but it's got a whole list of programming terms. I'm just interested in finding out how everybody pronounces just one thing - "char". I personally like "care" as in the first syllable of "character", since that's what it represents, but in past experience I've found there are far more people who say "char" as in "char-broiled", and some who say "car". Sorry to start a holy war, but I'm curious.

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  • What do you think of the following job specification?

    - by m.edmondson
    Just received this out of the blue from a recruiter - a number of things stand out to me: PERSON PROFILE Hard working - with a stay until the job in done mentality Thrive on the pressure of tight weekly development deadlines Good attention to detail to ensure bug free development Ability to test all development work from user's perpective Ability to think like a user as well as a developer Good communication skills to understand new funcationality and bugs Flexibility to contribute outside main responsbilities when needed. BENEFITS Salary dependant on skills Contributary Pension with 4% contribution from employer (after 1 year of service) Private Healthcase (after 1 year of service) 20 days holiday + 3-4 days holiday between Christmas and New year - 1 day extra holiday available each quarter you don't have a day off sick (and an additional day if you are not off sick for the whole year ). Would you want to work here? From what I can see they want a work-a-holic who will crawl out of his death bed in order to not lose holiday entitlement.

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  • Implementing MVC pattern in SWT application

    - by Pradeep Simha
    I am developing an SWT application (it's basically an Eclipse plugin, so I need to use SWT). Currently my design is as follows: Model: In model, I have POJOs which represents the actual fields in views. View: It is a dumb layer, it contains just UI and contains no logic (not even event handlers) Controller: It acts as a mediator b/w those two layers. Also it is responsible for creating view layer, handling events etc. Basically I have created all of the controls in view as a static like this public static Button btnLogin and in controller I have a code like this: public void createLoginView(Composite comp) { LoginFormView.createView(comp); //This createView method is in view layer ie LoginFormView LoginFormView.btnLogin.addSelectionListener(new SelectionListener() { //Code goes here }); } Similalrly I have done for other views and controls. So that in main class and other classes I am calling just createLoginView of controller. I am doing similar thing for other views. So my question, is what I am doing is correct? Is this design good? Or I should have followed any other approach. Since I am new to SWT and Eclipse plugin development (basically I am Java EE developer having 4+ years of exp). Any tips/pointers would be appreciated.

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  • Configuration data: single-row table vs. name-value-pair table

    - by Heinzi
    Let's say you write an application that can be configured by the user. For storing this "configuration data" into a database, two patterns are commonly used. The single-row table CompanyName | StartFullScreen | RefreshSeconds | ... ---------------+-------------------+------------------+-------- ACME Inc. | true | 20 | ... The name-value-pair table ConfigOption | Value -----------------+------------- CompanyName | ACME Inc. StartFullScreen | true (or 1, or Y, ...) RefreshSeconds | 20 ... | ... I've seen both options in the wild, and both have obvious advantages and disadvantages, for example: The single-row tables limits the number of configuration options you can have (since the number of columns in a row is usually limited). Every additional configuration option requires a DB schema change. In a name-value-pair table everything is "stringly typed" (you have to encode/decode your Boolean/Date/etc. parameters). (many more) Is there some consensus within the development community about which option is preferable?

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  • Equal Gifts Algorithm Problem

    - by 7Aces
    Problem Link - http://opc.iarcs.org.in/index.php/problems/EQGIFTS It is Lavanya's birthday and several families have been invited for the birthday party. As is customary, all of them have brought gifts for Lavanya as well as her brother Nikhil. Since their friends are all of the erudite kind, everyone has brought a pair of books. Unfortunately, the gift givers did not clearly indicate which book in the pair is for Lavanya and which one is for Nikhil. Now it is up to their father to divide up these books between them. He has decided that from each of these pairs, one book will go to Lavanya and one to Nikhil. Moreover, since Nikhil is quite a keen observer of the value of gifts, the books have to be divided in such a manner that the total value of the books for Lavanya is as close as possible to total value of the books for Nikhil. Since Lavanya and Nikhil are kids, no book that has been gifted will have a value higher than 300 Rupees... For the problem, I couldn't think of anything except recursion. The code I wrote is given below. But the problem is that the code is time-inefficient and gives TLE (Time Limit Exceeded) for 9 out of 10 test cases! What would be a better approach to the problem? Code - #include<cstdio> #include<climits> #include<algorithm> using namespace std; int n,g[150][2]; int diff(int a,int b,int f) { ++f; if(f==n) { if(a>b) { return a-b; } else { return b-a; } } return min(diff(a+g[f][0],b+g[f][1],f),diff(a+g[f][1],b+g[f][0],f)); } int main() { int i; scanf("%d",&n); for(i=0;i<n;++i) { scanf("%d%d",&g[i][0],&g[i][1]); } printf("%d",diff(g[0][0],g[0][1],0)); } Note - It is just a practice question, & is not part of a competition.

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  • How do I handle 3rd party search result data (via cache)

    - by reikyoushin
    I have a search function on my site and it is taking data from 6 different 3rd party resources. The problem is, it takes too long requesting the data over and over again on the results page. I've read for questions like this on SO about session not being a good choice but for me 'memcache' is not an option, because the server doesn't have memcached installed and I have no way to install it now. Is there any other approach to do this? Storing in the database seem inappropriate because the data depends on the search terms requested. What I've been thinking is writing a file on the server that would act as a cache for this file but I don't know how I would know when to delete it after.

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  • How to deal with a boss who is extremely competitive [closed]

    - by user72101
    Okay, so I recently joined this group. My boss who I reported to, left a while ago and my colleague was made the team lead. We both now report to the same head, but she heads the team I work in. I am not sure on how to deal with various situations. I would imagine a team lead who motivates the rest of the team, and not someone who would take credit for what others do. I am the only one who works at the same geographic location. She is very smart, no doubt about it. Things get to me, for example I work on an issue and email a dev team, she would respond on top of my emails and as she is the lead, people respond to her rather than to me. If there is an email addressed with the head on it, she would get it to faster than I do, even when she knew I am looking into it. The rest of the team keeps asking me questions or help. I find it hard to say no, and I try to help them as i feel I might need their help someday as well. I slack in my own work or I could have used the time to learn things. I feel that she should be the go to person and not me. If one gets the benefits of being a lead, why not the work that goes with it? I feel I am stuck in a very unfortunate situation and am totally helpless about it. Everyday it is something or the other. I work on a project for months and finally when it is about to go live and there was a minor issue and the head started asking questions, she completely stole my thunder on a call. She would not let me speak and I have to actually cut her off to speak up. The ideal would be not to give it a thought and just do the best I can,but I feel I am capable of much more and not able to give my best because of this constant war at work. Neetu

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  • June 25 changes to BIS 742.15 How does it impact SSL iPhone App export compliance

    - by Rob
    This question isn't strictly development-related but I hope it's still acceptable :) On June 25, 2010 the BIS updated 742.15 and of interest to me is the new 742.14(b)(4) "Exclusions from mass market classification request, encryption registration and self-classification reporting requirements" and 742.15(b)(4)(ii) which states… (ii) Foreign products developed with or incorporating U.S.-origin encryption source code, components, or toolkits. Foreign products developed with or incorporating U.S. origin encryption source code, components or toolkits that are subject to the EAR, provided that the U.S. origin encryption items have previously been classified or registered and authorized by BIS and the cryptographic functionality has not been changed. Such products include foreign developed products that are designed to operate with U.S. products through a cryptographic interface. I take this to mean that my Canadian produced product that uses https is now excluded from requiring a CCATTS. What does everyone else think?

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  • Qt Certification Exams

    - by karlphillip
    I'm wondering about doing a Qt Certification Exam this year, but I'm not 100% sure the investment is worth. I'm considering it because I think it could be a nice + on my resume, and as you know, I'm all for improving my software engineer persona. As I already earn a BSc and MSc degrees in computer stuff, I guess I see the certification process as some kind of adventure. Anyway, I know I'll spend a lot of time preparing myself for the exam and I just wanted to know if a Qt certification is worth the effort. Apparently there are 2 certificates that you can get in the Qt world: Nokia Certified Qt Developer (basic) Nokia Certified Qt Specialist (advanced) Nowadays I build cross-platform software in C++ and this exam would fit beautifully in my resume. My main concern is that, given the obscure future of Qt, I might be throwing time and money out the window. I'm looking for some advice regarding the usefulness of such certifications.

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  • What are the best practices for phasing out obsolete code?

    - by P.Brian.Mackey
    I have the need to phase out an obsolete method. I am aware of the [Obsolete] attribute. Does Microsoft have a recommended best practice guide for doing this? Here's my current plan: A. I do not want to create a new assembly because developers would have to add a new reference to their projects and I expect to get a lot of grief from my boss and co-workers if they must do this. We also do not maintain multiple assembly versions. We only use the latest version. Changing this practice would require changing our deployment process which is a big issue (have to teach people how to do things with TFS instead of FinalBuilder and get them to give up FinalBuilder) B. Mark the old method obsolete. C. Because the implementation is changing (not the method signature), I need to rename the method rather than create an overload. So, to make users aware of the proper method I plan to add a message to the [Obsolete] attribute. This part bothers me, because the only change I'm making is decoupling the method from the connection string. But, because I'm not adding a new assembly, I see no way around this. Result: [Obsolete("Please don't use this anymore because it does not implement IMyDbProvider. Use XXX instead.")]; /// <summary> /// /// </summary> /// <param name="settingName"></param> /// <returns></returns> public static Dictionary<string, Setting> ReadSettings(string settingName) { return ReadSettings(settingName, SomeGeneralClass.ConnectionString); } public Dictionary<string, Setting> ReadSettings2(string settingName) { return ReadSettings(settingName);// IMyDbProvider.ConnectionString private member added to class. Probably have to make this an instance method. }

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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 to avoid code duplication for a system which has logic that may change year wise?

    - by aravind
    What would be the way to design a system which has logic that may change year wise? There is an application which conducts online exams. There are five questions for a particular subject. The questions may (or may not) change year wise. As per my current design, the questions in database are stored year wise. There are some year specific code logic as well. In order to enable the application for another year, the year specific database records and code will be copied or duplicated. How to avoid this code duplication?

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  • jQuery + Perl CGI to vb.net transition

    - by user1257458
    I've been developing oracle database-heavy "web applications" forever by building my html by hand, adding some jquery to handle ajax requests (html inserts for forms processing etc), and always did my server side stuff in perl cgi. I really love how easy it is to read some form input, execute some select statements through dbi (SO EASY), and generate HTML to be inserted by the jquery request. That's a web application to me. However, my new boss builds everything in visual studio 2010, vb.net, usually webforms. So, for work reasons, I now need to start developing in vb.net so it can be collectively maintained, and I'm just seeking advice on where to start learning/how to approach this. I know I could at least learn ASP.net and VB.net, and create a webform, have it read parameters, return HTML, etc. which would allow me to use my previously written HTML and client-side scripts (jQuery). Although- since we're moving heavily to mobile applications I really need to reduce client-side processing load. Is there any advantage to my boss' method? Thanks a ton.

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  • The University with the best Computer Science degree?

    - by Shinnok
    Which University provides the best Computer Science degree in your opinion(non US Universities welcomed too)? I do realize that you most probably didn't attend more then one University so you can't really provide a truly insightful opinion on several institutions, but what you can do instead, is describe the one you attended and outline it's strengths and weaknesses. What do i mean by the best is essentially the University that upon graduation and given a subject's assumed reasonable level of passion and interest in the field, one can trust upon the fact he was at least exposed to the best and most deep, correct and up to date courses on Programming, Operating Systems, Internet and Computer Technology overall. We have all heard of recent horror stories in Computer Science teaching, thus an exposure the best of the best, essentially the University you would grant your children to if they were to be interested into this field, would be a great thing.

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  • Improvements to Joshua Bloch's Builder Design Pattern?

    - by Jason Fotinatos
    Back in 2007, I read an article about Joshua Blochs take on the "builder pattern" and how it could be modified to improve the overuse of constructors and setters, especially when an object has a large number of properties, most of which are optional. A brief summary of this design pattern is articled here [http://rwhansen.blogspot.com/2007/07/theres-builder-pattern-that-joshua.html]. I liked the idea, and have been using it since. The problem with it, while it is very clean and nice to use from the client perspective, implementing it can be a pain in the bum! There are so many different places in the object where a single property is reference, and thus creating the object, and adding a new property takes a lot of time. So...I had an idea. First, an example object in Joshua Bloch's style: Josh Bloch Style: public class OptionsJoshBlochStyle { private final String option1; private final int option2; // ...other options here <<<< public String getOption1() { return option1; } public int getOption2() { return option2; } public static class Builder { private String option1; private int option2; // other options here <<<<< public Builder option1(String option1) { this.option1 = option1; return this; } public Builder option2(int option2) { this.option2 = option2; return this; } public OptionsJoshBlochStyle build() { return new OptionsJoshBlochStyle(this); } } private OptionsJoshBlochStyle(Builder builder) { this.option1 = builder.option1; this.option2 = builder.option2; // other options here <<<<<< } public static void main(String[] args) { OptionsJoshBlochStyle optionsVariation1 = new OptionsJoshBlochStyle.Builder().option1("firefox").option2(1).build(); OptionsJoshBlochStyle optionsVariation2 = new OptionsJoshBlochStyle.Builder().option1("chrome").option2(2).build(); } } Now my "improved" version: public class Options { // note that these are not final private String option1; private int option2; // ...other options here public String getOption1() { return option1; } public int getOption2() { return option2; } public static class Builder { private final Options options = new Options(); public Builder option1(String option1) { this.options.option1 = option1; return this; } public Builder option2(int option2) { this.options.option2 = option2; return this; } public Options build() { return options; } } private Options() { } public static void main(String[] args) { Options optionsVariation1 = new Options.Builder().option1("firefox").option2(1).build(); Options optionsVariation2 = new Options.Builder().option1("chrome").option2(2).build(); } } As you can see in my "improved version", there are 2 less places in which we need to add code about any addition properties (or options, in this case)! The only negative that I can see is that the instance variables of the outer class are not able to be final. But, the class is still immutable without this. Is there really any downside to this improvement in maintainability? There has to be a reason which he repeated the properties within the nested class that I'm not seeing?

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  • Are there examples of non CRUD approaches?

    - by Pieter B
    I'm a programmer but also have worked as an archivist. As archivist it's a lot about keeping data. I often get into arguments with colleagues when it comes to operations on data. I don't like the U and the D in CRUD too much. Rather then update a record I prefer to add a new one and have a reference to the old record. That way you build a history of changes. I also don't like deleting records but rather mark them as inactive. Is there a term for this? Basically only creating and reading data? Are there examples of this approach?

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  • Reverse horizontal and vertical for a HTML table

    - by porton
    There is a two-dimensional array describing a HTML table. Each element of the array consists of: the cell content rowspan colspan Every row of this two dimensional array corresponds to <td> cells of a <tr> of the table which my software should generate. I need to "reverse" the array (interchange vertical and horizontal direction). Insofar I considered algorithm based on this idea: make a rectangular matrix of the size of the table and store in every element of this matrix the corresponding index of the element of the above mentioned array. (Note that two elements of the matrix may be identical due rowspan/colspan.) Then I could use this matrix to calculate rowspan/colspan for the inverted table. But this idea seems bad for me. Any other algorithms? Note that I program in PHP.

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  • When there's no TCO, when to worry about blowing the stack?

    - by Cedric Martin
    Every single time there's a discussion about a new programming language targetting the JVM, there are inevitably people saying things like: "The JVM doesn't support tail-call optimization, so I predict lots of exploding stacks" There are thousands of variations on that theme. Now I know that some language, like Clojure for example, have a special recur construct that you can use. What I don't understand is: how serious is the lack of tail-call optimization? When should I worry about it? My main source of confusion probably comes from the fact that Java is one of the most succesful languages ever and quite a few of the JVM languages seems to be doing fairly well. How is that possible if the lack of TCO is really of any concern?

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  • Should I reuse variables?

    - by IAdapter
    Should I reuse variables? I know that many best practice say you should not do it, however later when different developer is debugging the code and have 3 variables that look a like and only difference is that they are created in different places in the code he might be confused. unit-testing is a great example of this. However I do know that best practice are most of the time against it. For example they say not to "overide" method parameters. Best practice are even are against nulling the previous variables (in Java there is Sonar that has warning when you assign null to variable that you don't need to do it to call garbage collector since Java6. you cant always control what warnings are turned off, most of the time the default is on)

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  • Managing Eclipse projects in source control

    - by Matt Phillips
    I've been using eclipse for a long time to do development. One of the problems I've come across when working on other people's projects is if they come from source control, some of the eclipse project files "default.properties" and other xml config files are missing. Its usually a big pain in the butt to get the project running in eclipse. I understand the reasoning to not have certain files tracked because they may be full of specific stuff to a certain eclipse install. How do all of you manage that?

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  • Where can I find out the following info on python (coming from Ruby)

    - by Michael Durrant
    I'm coming from Ruby and Ruby on Rails to Python. Where can I find or find resources about: The command prompt, what is python's version of 'irb' django, what is a good resource for installing, using, etc. pythoncasts... is there anything like railscats, i.e. good video tutorials web sites with the api info about what version have what and which to use. info and recommendations on editors, plugins and IDE's common gotchas for newbies and good things to know at the outset scaling issues, common reasons what is the equivalent of 'gems', i.e. components I can plug in what are popular plugins for django authentication and forms similar to devise and simple_form testing, what's available, anything similar to rspec? database adapters - any preferences? framework info - is django MVC like rails? OO'yness. Is everything an object that gets send messages? Different paradign? syntax - anything like jslint for checking for well-formed code?

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