What is the difference between design patterns and architectural patterns?

Question

When we read about design patterns on the Internet, we note that there are 3 categories:

• Creations
• Structural
• behavioral

But when we create a software architecture, we think about MVP, MVC or MVVM.

For example, among the creation templates, I found a singleton template, but I also used singleton in my MPV.

So my question is: is the design pattern the whole structure of the product?

• If so, how can singleton be a design pattern? Because I can use it anywhere in the application. In principle, it is limited only to create one instance at a time in memory, but doesn’t this concept determine how software is developed?

• If not, where are MVP, MVC, and MVVM in the three template categories? And what is the difference between design and software architecture?

Answer 1

This requires a detailed explanation, but I will try to outline the differences as far as I know.

Templates are the overtaking community you will find in programs. This allows us to deconstruct a large complex structure and build using simple parts. It provides a general solution to a class of problems.

Large comprehensive software goes through a series of deconstructs at different levels. At a high level, architectural patterns are tools. At a lower level, design patterns are tools and at the implementation level, programming paradigms are tools.

Sample can occur at a variety of levels. See Fractals . Quick sorting, merge sorting - all algorithmic templates for organizing a group of elements in order.

For the most simplified view:

Programming paradigms Specific to programming language ...................... Design patterns Solves reoccurring problems in software construction ...................... Architectural patterns Fundamental structural organization for software systems ...................... 

Idioms are language-specific and language-specific programming methods that fill low-level details.

Design patterns are usually associated with common levels of code. It provides various schemes for processing and building small subsystems. It is usually affected by a programming language. Some patterns fade in insignificance due to language paradigms . Design patterns are average tactics that shape the structure and behavior of entities and their relationships.

Although architectural patterns are considered as generality at a higher level than design patterns. Architectural patterns are high-level strategies that relate to large-scale components, global properties, and system mechanisms.

How are the patterns obtained? Across:

• reuse
• classification
• and finally, abstraction to separate the community.

If you followed the thoughts outlined above. You will see that Singleton is a "design pattern" and MVC is one of the "architectural" patterns for troubleshooting.

Try to read:

• http://en.wikipedia.org/wiki/Architectural_pattern_(computer_science)
• http://en.wikipedia.org/wiki/Design_pattern
• http://en.wikipedia.org/wiki/Anti-pattern

Answer 2

Design patterns are well-known patterns for solving technical problems in such a way that it turns out many times. Design patterns are common design patterns and structures that are created to create reusable object-oriented software. Examples of design patterns: Factory Pattern, Singleton, Facade, State, etc. Design patterns can be used to solve small problems throughout the application and it is much easier to insert, modify, add than the general architecture.

Architectural patterns are well-known patterns for solving application software architecture problems. Application software architecture is the process of defining a structured solution that meets all technical and operational requirements. Application architecture is the general "organization" of code. Examples of different architectures can be MVC, MVVM, MVP, n-layer (e.g. UI-BLL-DAL), etc. The architecture usually needs to be decided in advance and it is often difficult to change after creating the application.

Answer 3

Architectural elements tend to collections of classes or modules, usually represented as boxes. Architecture diagrams represent the highest level, looking down, while class diagrams are at the atomic level. The purpose of architecture patterns is to understand how the main parts of the system are combined, how messages and data pass through the system, and other structural problems. Architectural patterns use different types of components, each of which consists of successively smaller modules. Each component is responsible for the architecture. Design patterns are low-level or class-level design patterns for small particles of applications.

For more information: https://www.oreilly.com/ideas/contrasting-architecture-patterns-with-design-patterns

Answer 4

Well, for the main part this is a matter of language. In my experience, the border between design and architecture, in terms of software, is a wide river with its width, due to the water level, which, in turn, mainly depends on the marketing seasons. Typically, the term “design” is used with a strong aspect of the behavior of the software product recognized by end users, while “architecture” means the technical structure of the software, i.e. e. components, libraries, protocols, and everything he needs to complete the design. "Design patterns" have two roles: 1 they are considered as the best methods for solving the category of (more or less) standard problems, and not prodiucts; 2nd they help developers communicate. Staying with your Singleton example, it lets us know what mechanics are, just using the word, instead of explaining each time that we created one instance using the assigned dataspace (variable or whatever) that is set to be controlled and guaranteed to be the only one because we protected the constructor of the class, etc. Therefore, IMHO a short answer to your question: it depends on who is speaking. It makes sense?

Answer 5

Design patterns differ from architectural patterns in their scope, they are more localized, they have less impact on the code base, they affect a specific section of the code base, for example:

 How to instantiate an object when we only know what type needs to be instantiated at run time (maybe a Factory Class?) How to make an object behave differently according to its state (maybe a state machine, or a Strategy Pattern?) 

Architectural patterns have a significant impact on the code base, most often affecting the entire application horizontally (i.e. how to structure the code inside the layer) or vertically (i.e. how the request is processed from the outer layers to the inner layers and back). Examples of architectural patterns: model-view-controller, model-view-view