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• DDD: service contains two repository

  - by tikhop

  Does it correct way to have two repository inside one service and will it be an application or domain service? Suppose I have a Passenger object that should contains Passport (government id) object. I am getting Passenger from PassengerRepository. PassengerRepository create request to server and obtain data (json) than parse received data and store inside repository. I have confused because I want to store Passport as Entity and put it to PassportRepository but all information about password contains inside json than i received above. I guess that I should create a PassengerService that will be include PassengerRepository and PassportRepository with several methods like removePassport, addPassport, getAllPassenger and etc. UPDATE: So I guess that the better way is represent Passport as VO and store all passports inside Passenger aggregate. However there is another question: Where I should put the methods (methods calls server api) for management passenger's passport. I think the better place is so within Passenger aggregate.

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• My proposed design is usually worse than my colleague's - how do I get better?

  - by user151193

  I have been programming for couple of years and am generally good when it comes to fixing problems and creating small-to-medium scripts, however, I'm generally not good at designing large scale programs in object oriented way. Few questions Recently, a colleague who has same number of years of experience as me and I were working on a problem. I was working on a problem longer than him, however, he came up with a better solution and in the end we're going to use his design. This really affected me. I admit his design is better, but I wanted to come up with a design as good as his. I'm even contemplating quitting the job. Not sure why but suddenly I feel under some pressure e.g. what would juniors think of me and etc? Is it normal? Or I'm thinking a little too much into this? My job involves programming in Python. I try to read source code but how do you think I can improve me design skills? Are there any good books or software that I should study? Please enlighten me. I will really appreciate your help.

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• A PHP design pattern for the model part [PHP Zend Framework]

  - by Matthieu

  I have a PHP MVC application using Zend Framework. As presented in the quickstart, I use 3 layers for the model part : Model (business logic) Data mapper Table data gateway (or data access object, i.e. one class per SQL table) The model is UML designed and totally independent of the DB. My problem is : I can't have multiple instances of the same "instance/record". For example : if I get, for example, the user "Chuck Norris" with id=5, this will create a new model instance wich members will be filled by the data mapper (the data mapper query the table data gateway that query the DB). Then, if I change the name to "Duck Norras", don't save it in DB right away, and re-load the same user in another variable, I have "synchronisation" problems... (different instances for the same "record") Right now, I use the Multiton pattern : like Singleton, but multiple instances indexed by a key (wich is the user ID in our example). But this is complicating my developpement a lot, and my testings too. How to do it right ?

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• Interface Design Problem: Storing Result of Transactions

  - by jboyd

  Requirements: multiple sources of input (social media content) into a system multiple destinations of output (social media api's) sources and destinations WILL be added some pseudo: IContentProvider contentProvider = context.getBean("contentProvider"); List<Content> toPost = contentProvider.getContent(); for (Content c : toPost) { SocialMediaPresence smPresence = socialMediaService.getSMPresenceBySomeId(c.getDestId()); smPresence.hasTwitter(); smPresence.hasFacebook(); //just to show what this is smPresence.postContent(c); //post content could fail for some SM platforms, but shoulnd't be lost forever } So now I run out of steam, I need to know what content has been successfully posted, and if it hasn't gone too all platforms, or if another platform were added in the future that content needs to go out for it as well (therefore my content provider will need to not only know if content has gone out, but for what platforms). I'm not looking for code, although sample/pseudo is fine... I'm looking for an approach to this problem that I can implement

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• Expose subset of a class - design question

  - by thanikkal

  Suppose i have a product class with about close to 100 properties. Now for some operations (Say tax calculation) i dont really need this bulky product type, rather only a subset that has price related properties. I am not sure if i should create different snap shots(class) of products that just has the properties that i am interested in. what would be the ideal approach so that i don't unnecessarily pass around unsought fluff? Thanks in advance.

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• Choosing a design pattern for a class that might change it's internal attributes

  - by the_drow

  I have a class that holds arbitrary state and it's defined like this: class AbstractFoo { }; template <class StatePolicy> class Foo : public StatePolicy, public AbstractFoo { }; The state policy contains only protected attributes that represent the state. The state might be the same for multiple behaviors and they can be replaced at runtime. All Foo objects have the same interface to abstract the state itself and to enable storing Foo objects in containers. I would like to find the least verbose and the most maintainable way to express this.

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• Book Review: Pro SQL Server 2008 Relational Database Design and Implementation

  - by Alexander Kuznetsov

  Investing in proper database design is a very efficient way to cut maintenance costs. If we expect a system to last, we need to make sure it has a good solid foundation - high quality database design. Surely we can and sometimes do cut corners and save on database design to get things done faster. Unfortunately, such cutting corners frequently comes back and bites us: we may end up spending a lot of time solving issues caused by poor design. So, solid understanding of relational database design is...(read more)

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• Are there any GUI or user interface design patterns? [closed]

  - by Niranjan Kala

  I was curious about GUI design patterns, so I searched and got some information, including a list of UI patterns for the web. This UI patterns website says that: UI Patterns is a growing collection of User Interface Design Principles and User Interface Usability Patterns present on web applications and sites today. Are there any other design patterns for constructing websites or other user interfaces? Are there any books that describe these patterns? I'm particularly interested in patterns for Windows desktop development and web development in the .NET platform.

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• Is there a definitive reference on Pinball playfield design?

  - by World Engineer

  I'm looking at designing tables for Future Pinball but I'm not sure where to start as I've little background in game design per se. I've played scores of pinball tables over the years so I've a fairly good idea of what is "fun" in those terms. However, I'd like to know if there is a definitive "bible" of pinball design as far as layout and scoring/mode design goes. I've looked but there doesn't seem to be anything really coherent that I could find. Is it simply a lost art or am I missing some buried gem?

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• Tool to Convert table base design to table less design

  - by brz dot net

  What is the best optimized way to convert table base design to table less design? the layout should be cross browser compatible and SEO Friendly. Is there any tool/editor which converts existing table base design to table less design? Is there any option in dreamweaver to convert the design in tableless?

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• HTML Editing in Novell Evolution

  - by DLH

  Is there a way to directly edit the HTML source of an email in Evolution? I'm never quite sure if my links are coming out right, and I'd like to be able to tweak them directly.

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• How to synchronizing Windows Mobile 6.1 phone with Kontact, Evolution, or Sunbird

  - by Good Time Tribe

  I would like to synchronize my Windows mobile 6.1 phone with Kontact. I'm somewhat flexible and would be willing to use Evolution or Sun bird. Provide step-by-step instruction in Ubuntu Jaunty Jackalope

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• Organize mail with Evolution & Gmail IMAP

  - by Phuong Nguyen

  With thunderbird & Gmail POP, things are very easy. I can create filter that will automatically move the mail to the appropriate sub-folder. However, with evolution & Gmail IMAP, I find things very messy. I cannot figure out how to create filter that will automatically move my email to a sub folder. Please advice. Thanks

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• Separate mail section for POP mail account in Evolution

  - by Phuong Nguyen

  In Evolution, if I use IMAP as the incoming protocol for the mail account, then this account will have a separated section. However, if I use POP as the incoming protocol, then this account is merged into On this Computer group. I want POP account to have a separated section. How would I do that?

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• No new mail icon in panel when using evolution

  - by ant2009

  I am using Ubuntu 10.04, kernel 2.6.32-21-generic, with Evolution 2.83.3. I have noticed that when I get a new email, it never shows a new mail icon in the panel. I had the same problem with 9.10, and I thought the problem would go away when I upgraded to 10.04. I have checked the properties in Mail preferences: Play sound - yes Display a notification - yes Indicate new messages in panel - yes Many thanks for any suggestions.

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• how should I design Objects around this business requirement?

  - by brainydexter

  This is the business requirement: " A Holiday Package (e.g. New York NY Holiday Package) can be offered in different ways based on the Origin city: From New Delhi to NY From Bombay to NY NY itself ( Land package ) (Bold implies default selection) a. and b. User can fly from either New Delhi or Bombay to NY. c. NY is a Land package, where a user can reach NY by himself and is a standalone holidayPackage. " Let's say I have a class that represents HolidayPackage, Destination (aka City). public class HolidayPackage{ Destination holidayCity; ArrayList<BaseHolidayPackageVariant> variants; BaseHolidayPackageVariant defaultVariant; } public abstract class BaseHolidayPackageVariant { private Integer variantId; private HolidayPackage holidayPackage; private String holidayPackageType; } public class LandHolidayPackageVariant extends BaseHolidayPackageVariant{ } public class FlightHolidayPackageVariant extends BaseHolidayPackageVariant{ private Destination originCity; } What data structure/objects should I design to support: options a default within those options Sidenote: A HolidayPackage can also be offered in different ways based on Hotel selections. I'd like to follow a design which I can leverage to support that use case in the future. This is the backend design I have in mind.

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• Design Code Outside of an IDE (C#)?

  - by ryanzec

  Does anyone design code outside of an IDE? I think that code design is great and all but the only place I find myself actually design code (besides in my head) is in the IDE itself. I generally think about it a little before hand but when I go to type it out, it is always in the IDE; no UML or anything like that. Now I think having UML of your code is really good because you are able to see a lot more of the code on one screen however the issue I have is that once I type it in UML, I then have to type the actual code and that is just a big duplicate for me. For those who work with C# and design code outside of Visual Studio (or at least outside Visual Studio's text editor), what tools do you use? Do those tools allow you to convert your design to actual skeleton code? It is also possible to convert code to the design (when you update the code and need an updated UML diagram or whatnot)?

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• Logo Design Online: Process Of Hiring And Working With An Online Logo Design Company

  Hiring an online logo design company is not easy these days; you will find hundreds of logo design companies on just click of a mouse. But it';s up to your decision making skills how you select a best... [Author: Gisselle Gloria - Web Design and Development - October 05, 2009]

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• On which crowdsourced design site have you the best experience? (ie, crowdspring, mycroburst, etc)

  - by Darryl Hein

  I wasn't sure which site to ask this on (as Graphic Design hasn't reached beta yet), so I thought I would try here. I'm looking to have a couple logos and website designs done. I've had some great local designers, but each one has moved or gone else where so I keep having to look for new designers. My thought and realization in the last couple days is to go to a crowdsourced design site like crowdspring.com or mycroburst.com. Both of these sites look good, but I'm wondering what else is out there? Are there better ones and how have your experiences been them?

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• Evolution Gmail Mashup + Fixing Time stamp

  - by Dan

  I wanted to migrate my university email (including subfolders) to my gmail account. Since gmail only imports POP3 which doesn't have subfolders, I had to connect to both gmail and my university mail using an email client (I am using Evolution) and then drag each folder from my university account to my gmail account. This worked for the most part, but the time stamp on every email I dragged over from my university account to gmail reads as todays date, when it was dragged over. If I enter the email and hit details it shows the actual sent date. How can I get it to not overwrite the received date when transferring? (as I assume this is what is happening). Thanks

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• How to intergrate Pidgin and Evolution into the message indicator?

  - by Steven Robert Chetwynd

  I upgraded to 12.10, I was using Unity 2d, but as it no longer exists I moved to gnome classic, something in the upgrade seems to have change the message indicator in the "Indicator Applet Complete". How do I integrate Pidgin and Evolution into the message indicator, there is only a button to launch Pidgin, but a new message does not change the colour of the icon or show up in the dropdown part. Also when minimizing Pidgin it minimizes like a normal window instead of minimizing to the applet. There is nothing in the menu for Evolution at all. Thanks in advanced.

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• Is there a Design Pattern for preventing dangling references?

  - by iFreilicht

  I was thinking about a design for custom handles. The thought is to prevent clients from copying around large objects. Now a regular handle class would probably suffice for that, but it doesn't solve the "dangling reference problem"; If a client has multiple handles of the same object and deletes the object via one of them, all the others would be invalid, but not know it, so the client could write or read parts of the memory he shouldn't have access to. Is there a design pattern to prevent this from happening? Two ideas: An observer-like pattern where the destructor of an object would notify all handles. "Handle handles" (does such a thing even exist?). All the handles don't really point to the object, but to another handle. When the object gets destroyed, this "master-handle" invalidates itself and therefore all that point to it.

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• Is It "Wrong"/Bad Design To Put A Thread/Background Worker In A Class?

  - by Jetti

  I have a class that will read from Excel (C# and .Net 4) and in that class I have a background worker that will load the data from Excel while the UI can remain responsive. My question is as follows: Is it bad design to have a background worker in a class? Should I create my class without it and use a background worker to operate on that class? I can't see any issues really of creating my class this way but then again I am a newbie so I figured I would make sure before I continue on. I hope that this question is relevant here as I don't think it should be on stackoverflow as my code works, this just a design issue.

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• How to integrate Pidgin and Evolution into the message indicator?

  - by Steven Robert Chetwynd

  I upgraded to 12.10, I was using Unity 2d, but as it no longer exists I moved to gnome classic, something in the upgrade seems to have change the message indicator in the "Indicator Applet Complete". How do I integrate Pidgin and Evolution into the message indicator, there is only a button to launch Pidgin, but a new message does not change the colour of the icon or show up in the dropdown part. Also when minimizing Pidgin it minimizes like a normal window instead of minimizing to the applet. There is nothing in the menu for Evolution at all.

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• How to make Evolution mail work with my work email address?

  - by Fady

  this is the 1st time to write here and the 1st time to use a mail client other than outlook. I tried to add my enterprise email address to evolution mail, I tried both server types exchange mapi and microsoft exchange. With exchange mapi i get this error message "Authentication failed. MapiLogonProvider: Failed to login into the server" With Microsoft Exchange I get this error "Could not connect to server . Make sure the URL is correct and try again." Although I'm sure of all the steps Server: ip address of the mail server Username: Domainname\Username Domain: domain name My system is Ubuntu Release 11.04 (natty) Kernel Linux 2.6.38-15-generic Genome 2.32.1 Evolution 2.32.2 Any kind of help is appreciated and thanks in advance

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