ATTENTION: You are on the develop branch.
This has been renamed to master.
The develop branch will not be maintained anymore.
It is only left here to avoid broken links to existing content.
Please update links to point to the master branch.
For details look at issue #320.
The data-access layer is responsible for all outgoing connections to access and process data. This is mainly about accessing data from a persistent data-store but also about invoking external services.
You need to make your choice for a database. Options are documented here.
The classical approach is to use a Relational Database Management System (RDMS). In such a case, we strongly recommend to follow our JPA Guide. Some NoSQL databases are supported by spring-data so you can consider the repository guide.