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React 2014 : Dean Wampler - Reactive Design & Language Paradigms 

React Conference
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Can reactive designs be implemented in any programming language? Or, are some languages and programming paradigms better for building reactive systems? How do traditional design approaches, like Object-Oriented Design (OOD) and Domain-Driven Design (DDD), apply to reactive applications. The Reactive Manifesto strikes a balance between specifying the essential features for reactive systems and allowing implementation variations appropriate for each language and execution environment.
In this presentation Dean compares and contrasts different techniques, like Reactive Streams, callbacks, Actors, Futures, and Functional Reactive Programming (FRP), and shows examples of how they are realised in various languages and toolkits. And he provides a personal opinion on the relative strengths and weaknesses of the language options for building reactive applications more effectively.

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14 апр 2014

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Комментарии : 2   
@ingodettling
@ingodettling 10 лет назад
After around 23 minutes Dean discusses DDD and describes an Entity as being stateless. I am sorry to disagree. An Entity by definition has state and an identity. If modeled correctly the identity of an Entity has to be unique, which means there is only one instance of an Entity with a certain identity in the whole system. It also can be queried by identity. In contrast Value Objects do not have an identity and therefore can not be queried. They are not unique. Often (complex) Value Objects one way or another belong to a certain instance of an Entity meaning that without the Entity it would not make sense to create or have the Value Object. On the other hand it is not uncommon to model Domain Events as Value Objects. Value Objects are also useful for context mapping. Nevertheless this is one of the most brilliant talks I have seen in recent years. Thanks Dean.
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