Tagged Questions
1
vote
1answer
62 views
Task Consumer/Processor architecture
PROBLEM
We have various tasks in our system which can take up to 20 minutes. These tasks are generally started from the web interface and run on a new thread. This is obviously a terrible solution ...
-2
votes
1answer
104 views
DDD/SOA Using .NET Message pattern(s) / Request Response with File Saving [closed]
I've done some research on this but I can't find more specific examples to help me with this. I'm new to SOA/Patterns in general please take it easy... :)
Can you display an example of using the ...
14
votes
9answers
2k views
Are too many if-else statements for validation bad? [duplicate]
From the book Professional Enterprise .Net, which has 5 star rating on Amazon that I am doubting after having a read through. Here is a Borrower class (In C# but it's pretty basic; anyone can ...
2
votes
4answers
329 views
Get rid of long/Complex if..else statements using Chain of Responsibility?
I've an HttpHandler, which allows users to login to a system by passing in an encrypted code.
Inside the ProcessRequest it performs quite a few steps.
Retrieve the encrypted code from request ...
3
votes
3answers
193 views
Confusion with Factory pattern regarding Liskov's Substitution Principle, code maintainability and Unit Testing?
I have a confusion regarding Factory Pattern there are basically two ways You can implement that.
Approach 1:
public interface IProductFactory
{
IProduct GetProductA();
IProduct ...
1
vote
4answers
208 views
Design Pattern for data import of various source types and to various destination types
I have to design and build an import script (in C#) that can handle the following:
read data from various sources (XML, XSLX, CSV)
verify data
write the data to various object types (customer, ...
3
votes
3answers
1k views
SOLID Application Structure and Design
A one possible structure for an application is to have it broken down into modules such as Data Access, Core, Services, UI. Now depending on what type of ORM you are using Data Access layer will have ...
3
votes
3answers
219 views
Design Pattern dilemma. Strategy seems wrong?
I would like some help/advice on a design pattern or similar I could use for my problem.
I have some shared functionality in my code and I use the Strategy pattern at present. I have a base class
...
1
vote
1answer
57 views
Where to put entity model classes in case of using a dataservice layer?
If my solution has both a "dataservice" project and a "business logic" project, where do the entity models, which represent database tables, belong?
At first i thought putting them in the ...
1
vote
3answers
293 views
Does non-virtual-by-default lead us to composition-over-inheritance?
There are some design guidelines about testable code in “The Art of Unit Testing”. The first one is “Make methods virtual by default”. I’m curious to know your idea about non-virtual-by-default ...
2
votes
1answer
488 views
DI / IoC Abstract Factory Galore
Given a project architecture as follows, where each box represents an assembly (all are class libraries), and each arrow stands for a dependency:
Might be worth nothing that this project is massive ...
0
votes
2answers
360 views
MVVM pattern - Best design approach to manage an application
One year ago, I discovered the WPF technology and I developed a little application, as first experiment, to compare the content of two different directories. The content of each directory is shown in ...
4
votes
2answers
297 views
Hide or Show singleton?
Singleton is a common pattern implemented in both native libraries of .NET and Java. You will see it as such:
C#: MyClass.Instance
Java: MyClass.getInstance()
The question is: when writing APIs, ...
1
vote
3answers
426 views
Dependency Injection Confusion
I think I have a decent grasp of what Dependency Inversion principle (DIP) is, my confusion is more around dependency injection.
My understanding is the whole point of DI is to decouple parts of an ...
2
votes
3answers
218 views
Recommened design pattern to handle multiple compression algorithms for a class hierarchy
For all you OOD experts. What would be the recommended way to model the following scenario?
I have a certain class hierarchy similar to the following one:
class Base {
...
}
class Derived1 : ...
