This contact is a port.Īs Cockburn explains, the word “hexagon” was chosen not because the number six is important, but rather to allow the people designing the architecture to have enough room to insert ports and adapters as required, ensuring they aren’t constrained by a one-dimensional layered drawing. User specific business logic class, such as “User”Ī contract between User and UserDataAdapter so that they can interact with each other - eg.: IUserDataPort. You want isolation between business logic and persistence so that both can perform and grow into their core responsibilities.Ī database-specific logic will be wrapped into an adapter class, for example, UserDataAdapter As a developer, you need to design a user related business logic, which will persist in a database. This isolation is supported through the concept of ports and adapters. Alistair Cockburn introduced it in 2005, with the core idea behind it being to make applications independent of direct dependency from UI and database. Hexagonal Architecture is sometimes referred to as ports and adapters architecture. We’ll explore them shortly, but first let’s have a look at what each of these patterns are about individually and how they compare to one another. If we look at them all together, they offer some useful architectural takeaways that are applicable regardless of the design approach you choose to use. #All business letters software softwareThey all suggest approaches to make software architectures more manageable and testable, but do so in their own way. They all define a loosely coupled testable system that avoids any direct dependencies in terms of implementation, yet do so using their own terminology and each with specific nuances. When I observe these patterns, I feel all three patterns are trying to advocate similar ideas. When we think about software architecture design, especially in the object-oriented world, the three most talked about patterns are Clean Architecture, Hexagonal Architecture, and Onion Architecture. So metimes different design approaches try to achieve similar objectives. There are several ways to design a system in software engineering, and every design has its own merits and challenges.
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