Architectural Patterns VS Design Patterns

December 19, 2013
Design patterns VS

It requires a detailed explanation but I will try to sketch the differences to best of my knowledge.

Patterns are distilled commonality that you find in programs. It allows us to deconstruct a large complex structure and build using simple parts. It provides a general solution for a class of problems.

A large complex software goes through a series of deconstruction at different levels. At large level, architectural patterns are the tools. At smaller level, design patterns are the tools and at implementation level, programming paradigms are the tools.

For a most simplistic 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 paradigm-specific and language-specific programming techniques that fill in low-level details.

Design patterns are usually associated with code level commonalities. It provides various schemes for refining and building smaller subsystems. It is usually influenced by programming language. Some patterns pale into insignificance due to language paradigms. Design patterns are medium-scale tactics that flesh out some of the structure and behavior of entities and their relationships.

While architectural patterns are seen as commonality at higher level than design patterns. Architectural patterns are high-level strategies that concerns large-scale components, the global properties and mechanisms of a system.

How are patterns obtained? Through :

  1. re-use,
  2. classification
  3. and finally abstraction to distill the commonality.

If you have followed the thoughts laid above. You will see that Singleton is a "design pattern" while MVC is one of the "architectural" pattern to deal with separation of concerns.

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MVC Design Pattern
MVC Design Pattern
Observer Design Pattern
Observer Design Pattern
Design Patterns, Architectural Patterns
Design Patterns, Architectural Patterns
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