Eric Evans in the book DDD: Tackling Complexity in the Heart of Software presents a model characteristic for Domain Driven Design, which consists of layers: User Interface, Application, Domain and …
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Designing a domain model with as few relationships as possible prevents the code from being complicated and difficult to maintain. On most large systems, relationships between entities cannot be avoided. …
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Many objects do not have their own identity. An example are windows with the same dimensions and the same way of opening and fixing, which do not differ from each …
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Many things are defined by their identity (uniqueness) and not by their attributes. A very good example is a man with features that can change or disappear completely throughout his …
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Bounded context In large applications, there are many models without clearly defined dependencies. As the system develops, the boundaries between models blur and the links between objects become unclear. For …
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The ubiquitous language is used to find an agreement between people who know the technological vocabulary and those who do not use it. Thanks to this, we can create a …
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Strategy pattern What is the strategy pattern? Via wikipedia For instance, a class that performs validation on incoming data may use a strategy pattern to select a validation algorithm based …
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Command pattern Another design pattern it is very popular.I’s used inter alia in approach CQRS (for more information about CQRS). What is command pattern and when to use it: Sometimes, …
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Observer pattern Today, I will try to present a observer pattern.It is part of behavioral patterns and is relatively simple so I think it’s worth it to present. Subject – the object of …
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State pattern Design pattern, which aims to facilitate the extension of the building of the new states. With the change of state is changing the behavior of object. States are …
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Composite is a structural design patterns. Via wikipedia: The composite pattern describes that a group of objects is to be treated in the same way as a single instance of …
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