1,479 questions
3
votes
2
answers
106
views
How to write an abstraction in Rust with multiple implementations
In my application I want to have an EventPersister trait that defines an abstraction of persisting events, then have various implementations that, for example, persist events in memory, in the file ...
- 2,589
0
votes
0
answers
19
views
Building a "Catalogue" mapping configurations to classes in python
I have many classes in Python, all inherited from the same abstract class. Each class has a config of its own. I want to create a catalog/builder class where I map the configs to the classes once. The ...
- 185
0
votes
0
answers
40
views
Using Factory Pattern yields No qualifying bean for service interface injected into springboot controller
I am facing an issue with my spring-boot application. The API is using the factory design pattern along with JpaRepository. The API manages creation of "Route" which is "Road" in ...
- 433
0
votes
0
answers
99
views
How to ensure initialization of static variables without explicitly including the header file
Considering the following example: A class named ObjectFactory is defined to manage the creation of several classes. These managed classes should be registered with the factory so that we can create ...
- 484
2
votes
1
answer
178
views
The way to filter objects by type in the factory
I have the factory that contains a map with the names of objects as key and pointer to function as value
template<class T>
static T* makeObj()
{
return new T();
}
using createFunction = std:...
- 23
0
votes
2
answers
334
views
Understanding Factory Design Pattern in Python
The Python version of the Factory pattern in Refactoring Guru is:
from __future__ import annotations
from abc import ABC, abstractmethod
class Creator(ABC):
@abstractmethod
def factory_method(...
- 134
0
votes
2
answers
95
views
How to Use Factory Pattern With Dependency Injection and input parameters?
I'm trying to understand how to create an instance of a service (for example, ITransport) with some input config at runtime using the Factory Pattern and Dependency Injection (Microsoft.Extensions....
- 49
2
votes
1
answer
81
views
C++ factory of a container type without defining the container element type
Based on this topic, I wonder if it would be possible to have a factory class that would provide a container type, without defining the type of element of the container.
Something like:
template <...
- 687
0
votes
0
answers
40
views
Factory Reverse design pattern discussion
I used to use factory method as a creational design pattern, but now I got stucked in the situation which is reversing the problem.
The normal behavior to create the factory pattern. I am facing the ...
0
votes
0
answers
109
views
How to merge two view content using factory design pattern in swift
I am following factory design pattern . From the view model state response I am rendering the view. For movie details view I am rendering
MovieDetailsDisplayViewController.
view content.
Here is view ...
user23454452
0
votes
1
answer
97
views
Why do we use factory class to instantiate interface
I'm currently reading book pro spring 6. I am a bit confused on one example from book
Here is the main class:
public class HelloWorldDecoupledWithFactory {
public static void main(String... args)...
- 23
0
votes
2
answers
211
views
Does factory design pattern violate Dependency Inversion Principle of solid principle in C#? [duplicate]
By definition, dependency injection promotes loosely coupled, maintainable, and testable code, and using interface and constructor injection we can get the object of the class implementing the ...
0
votes
1
answer
46
views
Factory Method: Why not one CreateMethod in Factory for each Type?
So I was reading along Design Patterns book to look up some details on the Factory Pattern. I was reading about two main variants of implementation:
Using the abstract Factory and ConcreteFactories ...
- 45
1
vote
2
answers
2k
views
How to resolve services in factory class using dependency injection? | C#
I have six implementations for the same interface registered on my DI container, like so:
services.AddScoped<IProductService, ProductService1>();
services.AddScoped<IProductService, ...
- 51
0
votes
1
answer
77
views
Mod-wsgi calls flask factory function twice
I am trying to build a flask app and using mod_wsgi server for hosting. I use a factory function to create the flask app but I observe that mod-wsgi calls the factory function twice within the same ...
- 11