October 2017
Intermediate to advanced
442 pages
12h 33m
English
Content preview from Architecting Modern Java EE Applications
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Domain event
Domain events represent events that are relevant to the business domain. They usually emerge from business use cases and have specific domain semantics. Examples for domain events are UserLoggedIn, ActiclePurchased, or CoffeeBrewFinished.
Domain events are typically implemented as value objects containing the required information. In Java, we realize events as immutable POJOs. Events happened in the past and can't be changed later on, so it is highly recommended to make them immutable. As seen before, we can use the CDI events functionality to publish and observe events with loose coupling. In CDI, all Java types can be used to be published as events. The concept of domain events is therefore a business definition rather than ...
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