February 2013
Intermediate to advanced
656 pages
21h 26m
English
Content preview from Implementing Domain-Driven Design
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Layers
The Layers Architecture [Buschmann et al.] pattern is considered by many to be the granddaddy of all. It supports N-tier systems and is, thus, commonly used in Web, enterprise, and desktop applications. Here we rigorously separate the various concerns of our application or system into well-defined layers.
Isolate the expression of the domain model and the business logic, and eliminate any dependency on infrastructure, user interface, or even application logic that is not business logic. Partition a complex program into layers. Develop a design within each layer that is cohesive and that depends only on the layers below. [Evans, Ref, p. 16]
Figure 4.1 shows the layers common to a DDD application that uses a traditional Layers Architecture. ...
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