August 2018
Intermediate to advanced
314 pages
8h 9m
English
Content preview from Java EE 8 Design Patterns and Best Practices
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Explaining the concept of the data-access object pattern
In the business world, the application always needs to be integrated with the data source in order to read, write, delete, or update data. This data source could be a relational database, NoSQL database, LDAP (Lightweight Directory Access Protocol), or filesystem, for example. Each type of data source has its structure and has a complexity to connect to, read, and write data. These complexities shouldn't be exposed to business logic and instead should be decoupled from it.
The data-access object pattern is a pattern used to abstract and hides all access to data sources from the business tier. This pattern encapsulates all data-source access logic and its complexities from the business ...
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