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Component-based software engineering - Wikipedia

From Wikipedia, the free encyclopedia

Engineering focused on building software from reusable components

Component-based software engineering (CBSE), also called component-based development (CBD), is a style of software engineering that aims to construct a software system from components that are loosely-coupled and reusable. This emphasizes the separation of concerns among components.[1][2]

To find the right level of component granularity, software architects have to continuously iterate their component designs with developers. Architects need to take into account user requirements, responsibilities and architectural characteristics.[3]

An example of two components in UML: Checkout processes a customer's order, which requires the other one to bill the credit card.

For large-scale systems developed by large teams, a disciplined culture and process is required to achieve the benefits of CBSE.[4] Third-party components are often utilized in large systems.

The system can be designed visually with the Unified Modeling Language (UML). Each component is shown as a rectangle, and an interface is shown as a lollipop to indicate a provided interface and as a socket to indicate consumption of an interface.

Component-based usability testing is for components that interact with the end user.

Programming paradigms

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Comparison by language

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Imperative Structured Object-oriented
(comparison, list) Declarative Functional
(comparison) Dataflow Logic DSL Concurrent,
distributed,
parallel Metaprogramming Separation
of concerns

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