All Questions
9 questions
-2
votes
3
answers
283
views
Should I do dependency inversion on the same layer level
I'm working on an accounting service. I have to generate invoice for a user and upload it to the file storage. So my service would have to use a service from file storage team. File storage service ...
- 233
6
votes
1
answer
437
views
Should operations on properties of list objects be encapsulated in a domain class that wraps the list?
I have a list of product price objects, List<ProductPrice>.
@Value
public class ProductPrice {
Long id;
LocalDate startDate;
LocalDate endDate;
BigDecimal value;
}
From ...
- 243
2
votes
2
answers
499
views
Exposing methods for polymorphic children from the aggregate root
Consider the following fictitious toy example:
There is an aggregate root DayChecklist that holds a list of Tasks planned for the day:
class DayChecklist {
String id;
DateTime today;
...
...
- 87
7
votes
2
answers
453
views
DRY polymorphic object creation (always valid)
Assuming we have polymorphic entities such as the following, with constructors enforcing invariants (assume there could be lots of sub-classes). What would be an effective/elegant approach to ...
- 399
8
votes
3
answers
2k
views
Microservices - What does it mean to deploy & upgrade independently?
In this article, it is mentioned (emphasis mine):
...the microservice architectural style is an approach to developing a
single application as a suite of small services, each running in its
own ...
- 2,305
1
vote
3
answers
2k
views
How to design an API wrapper with bulky operations on domain object? (Need guidance)
I need some guidance in designing an API wrapper for my backend APIs. I have tried to keep it as specific as possible.
Context: We have a project which supports certain file operations like edit, ...
- 37
4
votes
4
answers
187
views
Class design problem - splitting differences or making workarounds?
I have this problem: Class1 and Class2 are of same Base type. They are representing the same concept but with slightly different implementation. If I model them "the right way" in Java, I would have ...
- 367
1
vote
1
answer
841
views
Rich Model vs God Class [duplicate]
I have a legacy code containing some behaviour classes, like services and controllers. My model is pretty anaemic. It's just a repository of getters and setters, and I want to refactor it. There is a ...
- 29
4
votes
2
answers
1k
views
A design decision in composition or aggregation
I've recently had doubts about some design decisions that I frequently make, so this time I decided to take some time and try to analyze it to find the best solution. I will describe a simple scenario ...
- 141