How does spring boot JpaRepository work?
The Spring Data JPA framework can then inspect that contract, and automatically build the interface implementation under the covers for you.
For Spring Data JPA to intelligently generate an implementation of your Repository interface, a Query DSL is needed.
DSL is an acronym for Domain Specific Language..
What is a repository class in Java?
The repository pattern is extremely popular. In its modern interpretation, it abstracts the data store and enables your business logic to define read and write operations on a logical level. It does that by providing a set of methods to read, persist, update and remove an entity from the underlying data store.
What does @repository annotation do?
The @Repository annotation is a marker for any class that fulfils the role or stereotype of a repository (also known as Data Access Object or DAO). Among the uses of this marker is the automatic translation of exceptions, as described in Exception Translation.
Is JPA an ORM?
By itself, JPA is not a tool or framework; rather, it defines a set of concepts that can be implemented by any tool or framework. While JPA’s object-relational mapping (ORM) model was originally based on Hibernate, it has since evolved.
What is difference between JpaRepository and CrudRepository?
Crud Repository is the base interface and it acts as a marker interface. JPA also provides some extra methods related to JPA such as delete records in batch and flushing data directly to a database. … JpaRepository ties your repositories to the JPA persistence technology so it should be avoided.