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This video provides a live coding introduction to the Spring Data JPA project by Oliver Gierke. Spring JPA aims to significantly improve the implementation of data access layers by reducing the effort to the amount that's actually needed. As a developer you write your repository interfaces, including custom finder methods, and Spring will provide the implementation automatically. Spring JPA also takes the concept of a specification from Eric Evans' book Domain Driven Design, that carries the same semantics and provides an API to define such Specifications using the JPA criteria API.

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