![]() Flyweight pattern: reduce the number of objects created and to decrease memory footprint and increase performance.Façade pattern: provide a unified interface to a set of hides the complexities of the system and provides an interface to the client using which the client can access the system.Decorator pattern: allows adding new functionality to an existing object without altering its structure.It composes objects in term of a tree structure to represent part as well as a whole hierarchy Composite pattern: provide a way to treat a group of objects in a similar way as a single object.Filter pattern: Also known as criteria pattern, it provides a way to filter a set of objects using different criteria and chaining them in a decoupled way through logical operations.Bridge pattern: provide a way to decouple the abstraction from its implementation.Adapter pattern: it works as a bridge between two incompatible interfaces and combines their capabilities.For example: how to separate the UI of the data module in our architectural style? How to integrate a third-party component with our system? how many tires will we have in our client-server architecture? Examples of architectural patterns are microservices, message bus, service requester/ consumer, MVC, MVVM, microkernel, n-tier, domain-driven design, and presentation-abstraction-control. Personally, I prefer to define architectural patterns as a way to implement our architectural style. Moreover, the architectural pattern is describing the architectural style of our system and provides solutions for the issues in our architectural style. In another word, it reflects how a code or components interact with each other. The architectural pattern shows how a solution can be used to solve a reoccurring problem. Adaptive system styles: such as microkernel style, reflection, domain-specific language styles.Shared memory styles: such as role-based, blackboard, database-centric styles.Distributed systems: such as service-oriented, peer to peer style, object request broker, and cloud computing styles.Messaging styles: such as Implicit invocation, asynchronous messaging and publish-subscribe style.Structure architectural styles: such as layered, pipes and filters and component-based styles.Below is a list of architectural styles and examples for each category: There are different types of architectural styles, and moreover, we can mix them and produce a hybrid style that consists of a mix between two and even more architectural styles. Furthermore, when building the architectural style of our system we focus on layers and modules and how they are communicating with each other. The architectural style shows how do we organize our code, or how the system will look like from 10000 feet helicopter view to show the highest level of abstraction of our system design. ![]() So, what’s the difference between the terminologies and how can we differentiate between them? Architectural Style In software engineering, the terminology must be more clear and describe something specific. However, these definitions show two different things. But how can it be? The word style means: “a manner of doing something” while a pattern means: “a repeated decorative design”. In this article, we’re going to summarize the differences between them.Īccording to MSDN, architectural styles and patterns are the same things. Sadly, some of the software developers don’t understand the difference between architectural patterns and design patterns. Many software professionals think that architectural styles and patterns are the same.
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